An external circulation system for cyclic grinding of rolling surfaces of bearing rollers

Abstract

The present invention discloses an external circulation system for cyclic grinding of the rolling surface of bearing rollers, comprising a material receiving subsystem, a material feeding subsystem, a material storage station, a plurality of material storage units, and a control subsystem. The material storage station is used to store the material storage units, and the material storage space of the material storage unit is a plurality of mutually parallel material storage channels. The material receiving subsystem is used to sequentially store the bearing rollers leaving the outlet in the material storage unit in a single-line queue, with parallel axes and rolling surfaces close to the rolling surface. The material feeding subsystem is used to load the bearing rollers unloaded from the material storage unit into the entrance in an orderly manner according to the posture requirements of the grinding area for the bearing rollers. The control subsystem is used to decide when to unload the bearing rollers from which material storage unit. During the grinding process, after the bearing rollers complete one grinding in the grinding area, they enter the grinding area again after changing the order of entering the grinding area through the external circulation system, and the cycle continues until the specified technical indicators are met. The present invention can improve the dimensional consistency of the rolling surface of the bearing rollers.

Description

Technical Field

[0001] The invention relates to an external circulation system for cyclic grinding of the rolling surface of a bearing roller, and belongs to the technical field of precision machining of bearing rollers. Background Art

[0002] Roller bearings are widely used in various types of rotating machinery. As one of the most important parts of roller bearings, the dimensional consistency of the rolling surface of the bearing roller has a significant impact on the performance of the roller bearing.

[0003] Currently, known bearing rollers include cylindrical rollers, tapered rollers, and spherical rollers. The rolling surface machining process for these rollers includes: blank forming (turning, cold heading, or rolling), rough machining (soft grinding of the rolling surface), heat treatment, semi-finishing (hard grinding of the rolling surface), and finishing. The main known finishing method for rolling surfaces is centerless grinding combined with superfinishing. However, due to the inherent processing principles of centerless grinding and superfinishing, it is difficult to effectively improve the diameter dispersion of the rolling surface of bearing rollers.

[0004] Patent document with publication number CN113524018A discloses a grinding tool kit, equipment and method for finishing the rolling surface of cylindrical rollers. The equipment includes a main machine, an external circulation system and a grinding tool kit. The grinding tool kit includes a grinding sleeve and a grinding bar assembly. The grinding bar assembly includes a plurality of grinding bars with linear grooves on the front, and the inner surface of the grinding sleeve is provided with a cylindrical spiral groove. During the grinding process, a cylindrical roller to be processed is distributed at each intersection of the spiral groove and the linear groove; corresponding to each intersection, the area enclosed by the working surface of the spiral groove and the working surface of the linear groove is the grinding process area. Figure 1 (Original Attachment Figure 13 ), the external circulation system includes a collecting unit, a sorting unit, a feeding unit and a transmission subsystem. The collecting unit is arranged at the outlet of the spiral groove, and is used to collect the cylindrical rollers leaving the grinding processing area from the outlet of each spiral groove. The sorting unit is used to sort the cylindrical rollers into the queue required by the feeding unit. For the rotary type main machine of the grinding bar assembly, the feeding unit is arranged at the entrance of the spiral groove, and is used to feed the cylindrical rollers into the linear groove; for the rotary type main machine of the grinding sleeve, the feeding unit is arranged at the end of the grinding sleeve at the entrance of the spiral groove, and is used to feed the cylindrical rollers into the entrance of the spiral groove. The transmission subsystem is used to transfer cylindrical rollers between the various units in the external circulation system. During the grinding process, the path of the cylindrical roller in the external circulation system is: from the outlet of the spiral groove through the collecting unit, the sorting unit, the feeding unit to the entrance of the spiral groove.

[0005] Patent document with publication number CN113601277A discloses a grinding tool kit, equipment and method for finishing the rolling surface of a tapered roller. The equipment includes a main machine, an external circulation system and a grinding tool kit. The grinding tool kit includes a grinding sleeve and a grinding bar assembly. The inner surface of the grinding sleeve is provided with a cylindrical spiral groove, and the grinding bar assembly includes a plurality of grinding bars with linear grooves on the front. During the grinding process, a processed tapered roller is distributed at each intersection of the spiral groove and the linear groove. Corresponding to each intersection, the area enclosed by the working surface of the spiral groove and the working surface of the linear groove is the grinding process area. Figure 2 (Original Attachment Figure 15 ), the external circulation system includes a collecting unit, a sorting unit, a feeding unit and a transmission subsystem. The collecting unit is arranged at the outlet of the spiral groove, and is used to collect the tapered rollers leaving the grinding processing area from the outlet of each spiral groove. The sorting unit is used to sort the tapered rollers into the queue required by the feeding unit, and to adjust the direction of the small end of the tapered roller to be consistent. For the rotary main machine of the grinding bar assembly, the feeding unit is arranged at the entrance of the spiral groove, and is used to feed the tapered rollers into the linear groove; for the rotary main machine of the grinding sleeve, the feeding unit is arranged at the end of the grinding sleeve at the entrance of the spiral groove, and is used to feed the tapered rollers into the entrance of the spiral groove; the transmission subsystem is used to transfer the tapered rollers between the various units in the external circulation system. During the grinding process, the path of the tapered roller in the external circulation system is: from the outlet of the spiral groove through the collecting unit, the sorting unit, the feeding unit to the entrance of the spiral groove.

[0006] The patent document with publication number CN113524014A discloses a grinding tool kit, equipment and method for finishing the rolling surface of a spherical roller. The equipment includes a main machine, an external circulation system and a grinding tool kit. The inner surface of the grinding sleeve is provided with a first spiral groove. The grinding tool kit includes a grinding sleeve and a grinding bar assembly. The grinding bar assembly includes a plurality of grinding bars with straight grooves or second spiral grooves on the front. During the grinding process, a spherical roller to be processed is distributed at each intersection of the first spiral groove and the grinding bar groove. Corresponding to each intersection, the area enclosed by the working surface of the first spiral groove and the working surface of the grinding bar groove is the grinding processing area. Figure 3 (Original Attachment Figure 26), the external circulation system includes a collecting unit, a sorting unit, a feeding unit and a transmission subsystem. The collecting unit is arranged at the outlet of the first spiral groove, and is used to collect the spherical rollers leaving the grinding processing area from the outlet of each first spiral groove. When the spherical roller is a symmetrical spherical roller without a spherical base surface or a symmetrical spherical roller with a spherical base surface, the sorting unit is used to sort the spherical rollers into the queue required by the feeding unit; when the spherical roller is an asymmetric spherical roller, the sorting unit is used to sort the spherical rollers into the queue required by the feeding unit and adjust the direction of the small end of the spherical roller to be consistent. The transmission subsystem is used to transmit the spherical rollers between the various units in the external circulation system. For the rotary type main machine of the grinding bar assembly, the feeding unit is arranged at the entrance of the first spiral groove, and is used to feed the spherical rollers into the grinding bar groove; for the rotary type main machine of the grinding sleeve, the feeding unit is arranged at one end of the grinding sleeve at the entrance of the first spiral groove, and is used to feed the spherical rollers into the entrance of the first spiral groove. During the grinding process, the path of the cylindrical roller in the external circulation system is: from the outlet of the spiral groove through the collecting unit, the sorting unit, the feeding unit to the inlet of the first spiral groove.

[0007] The patent document with publication number CN108908094A discloses a grinding disc, equipment and method for finishing the rolling surface of cylindrical rollers. The equipment includes a main machine, a grinding disc kit and a roller circulation disc external system. The grinding disc kit includes a first grinding disc and a second grinding disc. The front of the first grinding disc includes a group of radially distributed straight grooves, and the front of the second grinding disc includes one or more spiral grooves. During the grinding process, a cylindrical roller to be processed is distributed at each intersection of each spiral groove of the second grinding disc and each linear groove of the first grinding disc. Corresponding to each intersection, the area enclosed by the working surface of the linear groove of the first grinding disc and the working surface of the spiral groove of the second grinding disc is the grinding process area. As Figure 4 (Original Attachment Figure 18), the roller circulation disc external system includes a roller collecting device, a roller conveying system, a roller sorting mechanism and a roller feeding mechanism. The roller collecting device is arranged at the outlet of each linear groove of the first grinding disc, and is used to collect the cylindrical rollers leaving the grinding processing area from the outlet of each linear groove. The roller sorting mechanism is arranged at the front end of the roller feeding mechanism, and is used to adjust the axis of the cylindrical roller to the direction required by the roller feeding mechanism. Corresponding to the main mechanism type one, the roller feeding mechanism is respectively installed at the entrance of each spiral groove of the second grinding disc, and is used to push the cylindrical roller into the entrance of the linear groove of the first grinding disc; corresponding to the main mechanism type two, the roller feeding mechanism is respectively installed at the entrance of each linear groove of the first grinding disc, and is used to push the cylindrical roller into the entrance of the linear groove of the first grinding disc. The roller conveying system is used to transport the cylindrical roller from the roller collecting device to the roller feeding mechanism. During the grinding process, the path of the cylindrical roller in the roller circulation disk external system is: from the outlet of the linear groove of the first grinding disk, through the roller collection device, roller conveying system, roller sorting mechanism and roller feeding mechanism in sequence, to enter the entrance of the linear groove of the first grinding disk.

[0008] The patent document with publication number CN108890516A discloses a grinding disc, equipment and method for finishing the rolling surface of circular arc convex cylindrical rollers. The equipment includes a main machine, a grinding disc kit and a roller circulation disc external system. The grinding disc kit includes a pair of coaxial first and second grinding discs arranged opposite to each other on the front. The front of the first grinding disc includes a group of radially distributed inward concave arc grooves, and the front of the second grinding disc includes one or more outward convex circular arc rotating surface spiral grooves. During the grinding process, a processed circular arc convex cylindrical roller is distributed at each intersection of the spiral groove of the second grinding disc and the inward concave arc groove of the first grinding disc. Corresponding to each intersection, the area enclosed by the working surface of the inward concave arc groove of the first grinding disc and the working surface of the spiral groove of the second grinding disc is the grinding process area. As Figure 5 (Original Attachment Figure 19), the outer system of the roller circulation disk includes a roller collecting device, a roller conveying system, a roller sorting mechanism and a roller feeding mechanism. The roller collecting device is arranged at the outlet of each concave arc groove of the first grinding disk, and is used to collect the arc convex cylindrical rollers leaving the grinding processing area from the outlet of each concave arc groove. The roller sorting mechanism is arranged at the front end of the roller feeding mechanism, and is used to adjust the axis of the arc convex cylindrical roller to the direction required by the roller feeding mechanism. The roller conveying system is used to transport the arc convex cylindrical rollers from the roller collecting device to the roller feeding mechanism. Corresponding to the main machine type one, the roller feeding mechanism is installed at the entrance of each spiral groove of the second grinding disk, and is used to push the arc convex cylindrical rollers into the entrance of the concave arc groove of the first grinding disk. Corresponding to the main machine type two, the roller feeding mechanism is installed at the entrance of each concave arc groove of the first grinding disk, and is used to push the arc convex cylindrical rollers into the entrance of the concave arc groove of the first grinding disk. During the grinding process, the path of the arc convex cylindrical roller in the outer system of the roller circulation disk is: from the exit of the concave arc groove in the first grinding disk, it passes through the roller collection device, roller conveying system, roller sorting mechanism and roller feeding mechanism in sequence, and enters the entrance of the concave arc groove in the first grinding disk.

[0009] The patent document with publication number CN108723979A discloses a grinding disc, equipment and method for finishing the rolling surface of a tapered roller. The equipment includes a main machine, a grinding disc kit and a roller circulation disc external system. The grinding disc kit includes a first grinding disc and a second grinding disc. The front of the first grinding disc includes a group of radially distributed straight grooves, and the front of the second grinding disc includes one or more spiral grooves. During the grinding process, a processed tapered roller is distributed at each intersection of the spiral groove of the second grinding disc and the straight groove of the first grinding disc. Corresponding to each intersection, the area enclosed by the working surface of the straight groove of the first grinding disc and the working surface of the spiral groove of the second grinding disc is the grinding process area. As Figure 6 (Original Attachment Figure 20), the roller circulation disc external system includes a roller collection device, a roller conveying system, a roller sorting mechanism, and a roller feeding mechanism. The roller collection device is arranged at the outlet of each linear groove of the first grinding disc, and is used to collect the tapered rollers leaving the grinding processing area from the outlet of each linear groove. The roller sorting mechanism is arranged at the front end of the roller feeding mechanism, and is used to adjust the axis of the tapered roller to the direction required by the roller feeding mechanism, and adjust the direction of the small end of the tapered roller to a direction that is compatible with the cross-sectional profile of the working surface of the spiral groove of the second grinding disc. Corresponding to the main machine model one, the roller feeding mechanism is respectively installed at the entrance of each spiral groove of the second grinding disc, and is used to push the tapered roller into the entrance of the linear groove of the first grinding disc; corresponding to the main machine model two, the roller feeding mechanism is respectively installed at the entrance of each linear groove of the first grinding disc, and is used to push the tapered roller into the entrance of the linear groove of the first grinding disc. The roller conveying system is used to transport the tapered rollers from the roller collection device to the roller feeding mechanism. During the grinding process, the path of the tapered roller in the roller circulation disk external system is: from the outlet of the linear groove of the first grinding disk, through the roller collection device, roller conveying system, roller sorting mechanism and roller feeding mechanism in sequence, to enter the entrance of the linear groove of the first grinding disk.

[0010] The patent document with publication number CN108673331A discloses a grinding disc, equipment and method for finishing the rolling surface of arc convex tapered rollers. The equipment includes a main machine, a grinding disc kit and a roller circulation disc external system. The grinding disc kit includes a pair of coaxial first and second grinding discs arranged opposite to each other on the front. The front of the first grinding disc includes a group of radially distributed inward concave arc grooves, and the front of the second grinding disc includes one or more outward convex arc rotating surface spiral grooves. During the grinding process, a processed arc convex tapered roller is distributed at each intersection of each spiral groove of the second grinding disc and each concave arc groove of the first grinding disc. Corresponding to each intersection, the area enclosed by the working surface of the concave arc groove of the first grinding disc and the working surface of the spiral groove of the second grinding disc is the grinding process area. As Figure 7 (Original Attachment Figure 20), the roller circulation disc external system includes a roller collection device, a roller conveying system, a roller sorting mechanism, and a roller feeding mechanism. The roller collection device is arranged at the exit of each concave arc groove of the first grinding disc, and is used to collect the arc convex tapered rollers that leave the grinding processing area from the exit of each concave arc groove. The roller sorting mechanism is arranged at the front end of the roller feeding mechanism, and is used to adjust the axis of the arc convex tapered roller to the direction required by the roller feeding mechanism, and adjust the direction of the small end of the arc convex tapered roller to the direction that is suitable for the cross-sectional profile of the working surface of the spiral groove of the second grinding disc. Corresponding to the main machine model 1, the roller feeding mechanism is respectively installed at the entrance of each spiral groove of the second grinding disc, and is used to push the arc convex tapered roller into the entrance of the concave arc groove of the first grinding disc. Corresponding to the main machine model 2, the roller feeding mechanism is respectively installed at the entrance of each concave arc groove of the first grinding disc, and is used to push the arc convex tapered roller into the entrance of the concave arc groove of the first grinding disc. The roller conveyor system is used to transport the arc-shaped, crowned, and tapered rollers from the roller collection device to the roller feed mechanism. During the grinding process, the arc-shaped, crowned, and tapered rollers follow a path within the roller circulation disc's outer system: from the exit of the concave arc groove within the first grinding disc, through the roller collection device, the roller conveyor system, the roller arranging mechanism, and the roller feed mechanism, to the entrance of the concave arc groove within the first grinding disc.

[0011] The processing methods disclosed in the above patent documents are precision evolution processing methods that have the ability to remove more material from the rolling surface of bearing rollers with larger diameters and less material from the rolling surface of bearing rollers with smaller diameters, which is beneficial for improving the dimensional consistency of the rolling surface of bearing rollers under mass production conditions. The "grinding processing area" mentioned in these patent documents can be summarized as the area where the grinding action occurs on the processed bearing rollers. The "entrance of the spiral groove," "entrance of the first spiral groove," "entrance of the straight groove," and "entrance of the concave arc groove" mentioned can be summarized as the entrance for the processed bearing rollers to enter the grinding processing area. The "exit of the spiral groove," "exit of the first spiral groove," "exit of the straight groove," and "exit of the concave arc groove" can be summarized as the exit for the processed bearing rollers to leave the grinding processing area. The equipment disclosed in the above patent documents is a typical representative of bearing roller circulation grinding equipment in the prior art. The external circulation system (roller circulation disk external system) in the disclosed equipment includes a collection unit (roller collection device), a transmission subsystem (roller conveying system), a sorting unit (roller sorting mechanism), and a feeding unit (roller feeding mechanism). During the grinding process, the path of the bearing rollers in the external circulation system is: from the exit of the grinding process area, it passes through the collection unit (roller collection device), the sorting unit (roller sorting mechanism), the feeding unit (roller feeding mechanism) to the entrance of the grinding process area. On the one hand, these external circulation systems do not involve structures related to the mixing method and mixing efficiency of the bearing rollers, and the dimensional consistency and convergence efficiency of the bearing rollers cannot be guaranteed; on the other hand, although the bearing rollers are in an orderly position and have a certain posture when in the grinding process area, the axial direction of the bearing rollers and the direction of the small end of the tapered roller or the asymmetric spherical roller need to be adjusted by the sorting unit before re-entering the grinding process area. This means that the bearing rollers are in an uncertain posture state from leaving the grinding process area to reaching the roller sorting mechanism. This posture uncertainty can easily cause collisions between the bearing rollers during rapid movement, resulting in non-negligible bumps and scratches on the surface of the bearing rollers. Summary of the Invention

[0012] The bearing rollers described in the present invention refer to the bearing rollers being processed, and the grinding zone described in the present invention refers to the area where the grinding action occurs on the bearing rollers. During grinding, the bearing rollers enter the grinding zone from the entrance and leave the grinding zone from the exit. The bearing rollers are cylindrical rollers, tapered rollers, or spherical rollers. The cylindrical rollers include cylindrical rollers with circular arc convexity, and the tapered rollers include tapered rollers with circular arc convexity. The types of spherical rollers include symmetrical spherical rollers without a spherical base surface, symmetrical spherical rollers with a spherical base surface, and asymmetric spherical rollers. The present invention classifies needle rollers as cylindrical rollers.

[0013] The conveying mechanism described in the present invention is used to transport the bearing rollers from one place to another in a single-line queue and posture-controlled manner. The conveying mechanism is a conveying mechanism in the prior art such as a flat belt conveying mechanism, a double-circular belt conveying mechanism, or a conveying mechanism developed in the future that can be used for the purpose described in the present invention. The present invention does not impose specific restrictions on the structure of the conveying mechanism.

[0014] The lifting mechanism described in the present invention is used to lift the bearing roller from a low place to a high place in a single-isolated, single-line queue, and posture-controlled manner. The lifting mechanism is a lifting mechanism in the existing technology such as a push plate lifting mechanism, a chain plate lifting mechanism, etc., or a lifting mechanism developed in the future that can be used for the purpose described in the present invention. The present invention does not impose specific restrictions on the structure of the lifting mechanism.

[0015] According to patent documents CN108908094A, CN108890516A, CN108723979A and CN108673331A and their accompanying drawings, the present invention refers to the first grinding disc and the second grinding disc in the grinding disc set of the prior art as the lower grinding disc and the upper grinding disc, respectively.

[0016] The present invention takes into account a variation of the grinding tool kit disclosed in patent documents CN113524018A, CN113601277A and CN113524014A, that is, a group of multiple coaxial annular grooves of equal diameter are provided on the inner wall of the grinding sleeve instead of cylindrical spiral grooves, and a through hole for the bearing roller to enter or leave the grinding processing area is provided corresponding to each annular groove and leads to the upper outer wall of the grinding sleeve, and the through hole is both the entrance 41 for the bearing roller to enter the grinding processing area and the exit 42 for the bearing roller to leave the grinding processing area. Figure 8 shown.

[0017] According to patent documents CN113524018A, CN113601277A and CN113524014A and their drawings as well as future technological developments, the present invention refers to the grinding tool kit including the grinding sleeve and the grinding strip assembly as a shaft sleeve type grinding tool kit, the grinding strip assembly as the grinding shaft, and the linear grooves or spiral grooves provided on the grinding strip assembly as grinding shaft grooves.

[0018] To address the challenges of existing bearing roller recirculation grinding technology, the present invention proposes an external circulation system for recirculating grinding of the rolling surfaces of bearing rollers. On the one hand, the structure of the present invention's external circulation system, related to the mixing method and mixing efficiency of the bearing rollers, helps improve the dimensional consistency and convergence efficiency of the bearing rollers. On the other hand, the unique design of the present invention's external circulation system ensures that the bearing rollers are always in an orderly and controlled position during the external circulation process, effectively preventing significant bumps and scratches on the bearing roller surfaces during the external circulation process.

[0019] In order to solve the above technical problems, the present invention proposes an external circulation system for cyclic grinding of the rolling surface of bearing rollers, comprising a material receiving subsystem, a material feeding subsystem, a material storage station, a plurality of material storage units and a control subsystem;

[0020] The storage station is used to store the storage units; the storage units are used to temporarily store the bearing rollers, and the storage units include one or more storage channels, and the bearing rollers are sequentially stored in the storage channels of the storage units in a single-line queue with axes parallel to each other and rolling surfaces close to rolling surfaces to reduce mutual collisions between the bearing rollers and avoid collision injuries; the storage channels gradually transition from the channel entrance to the channel exit from top to bottom to facilitate the unpowered rolling of the bearing rollers in the storage channels under the action of their own gravity; the storage units are the hardware basis for adjusting the order and position of the bearing rollers in the bearing roller queue in blocks under the condition that there is no physical contact between the bearing rollers loaded in different storage units, and the bearing roller queue is a closed-loop queue including all bearing rollers in the grinding processing area and the external circulation system;

[0021] The material receiving subsystem is used to load the bearing rollers leaving the exit of the grinding processing area into the unloaded material storage unit in a queue and posture-controlled manner to prevent the bearing rollers from being damaged by collision with each other;

[0022] The feeding subsystem is used to unload the bearing rollers from the storage unit selected in the storage station according to the decision of the control subsystem, and load them into the entrance of the grinding processing area in an orderly manner in a queue and posture-controlled manner according to the posture requirements of the grinding processing area for the bearing rollers, and prevent the bearing rollers from being damaged by collision with each other;

[0023] The bearing rollers in the same storage channel enter the storage channel from the channel entrance and leave the storage channel from the channel exit in the order of first-in-first-out and last-in-last-out;

[0024] The control subsystem is used to decide when to unload the bearing rollers from which storage unit; the control subsystem is the software basis for adjusting the order and position of the bearing rollers in the bearing roller queue in blocks without physical contact between the bearing rollers loaded in different storage units;

[0025] During the grinding process, the bearing rollers that have completed one grinding process in the grinding process area leave the grinding process area from the outlet, and are temporarily stored in an unloaded storage unit and stored in the storage station. According to the decision of the control subsystem, the bearing rollers are unloaded from the storage unit selected in the storage station and sent to the grinding process area from the entrance to continue to receive the grinding process. The order and position of the bearing rollers sent to the grinding process area in the bearing roller queue are updated according to the decision of the control subsystem, thereby realizing the mixed replacement of the bearing rollers in blocks without physical contact between the bearing rollers loaded in different storage units.

[0026] A process in which all the bearing rollers enter the grinding processing area from the entrance, undergo grinding in the grinding processing area, and leave the grinding processing area from the exit is called a grinding cycle;

[0027] The changes in the order and position of the bearing rollers in the outer circulation system that occur when the bearing rollers leave the grinding zone from the outlet change the combination of the bearing rollers when they subsequently enter the grinding zone, thereby extending the selective material removal effect between the bearing rollers in the grinding zone to the entire batch of bearing rollers; with the increase in grinding cycles, the dimensional consistency of the bearing rollers continues to improve until it reaches the specified technical indicators;

[0028] In order to improve the dimensional consistency of the bearing rollers, a feeding sequence rule for loading the bearing rollers into the inlet is required, and the timing of unloading the bearing rollers from each storage unit during the grinding process is planned based on the feeding sequence rule. The feeding sequence rule can ensure that the number of grinding cycles experienced by all the bearing rollers is close, while at the same time weakening the order and position characteristics of the bearing rollers compared with each other in the grinding process area in the bearing roller queue;

[0029] On the one hand, the external circulation system is used to cope with the grinding processing of large quantities of bearing rollers that exceeds the capacity of the grinding processing area; on the other hand, it is used to establish a logistics channel for the bearing rollers between the outlet and the inlet; and on the other hand, it is used to mix and replace the bearing rollers to weaken the order and position characteristics of the bearing rollers in the bearing roller queue.

[0030] Furthermore, the external circulation system is suitable for a bearing roller rolling surface circulation grinding device equipped with a grinding disc kit, wherein the grinding disc kit includes a lower grinding disc and an upper grinding disc, and the front of the lower grinding disc is provided with a group of no less than 3 straight grooves distributed radially in a plane or radially distributed on a conical surface or radially distributed inward concave arc grooves, and the front of the upper grinding disc is correspondingly provided with a plane spiral groove or a conical surface spiral groove or an outward convex circular arc rotating surface spiral groove, and the entrance of the grinding processing area is provided at the plane spiral groove or the conical surface spiral groove or the outward convex circular arc rotating surface spiral groove The outlet of the grinding processing area is located adjacent to one end of the inner edge of the upper grinding disc and leads to the back of the upper grinding disc. The outlet of the grinding processing area is located at one end of the outer edge of the upper grinding disc in the corresponding plane spiral groove, conical spiral groove, or convex arc rotary spiral groove. During grinding, the bearing rollers continuously enter the grinding processing area from the inlet and continuously leave the grinding processing area from the outlet. The bearing rollers enter the grinding processing area from the inlet and leave the grinding processing area from the outlet synchronously with the grinding process. The bearing rollers are cylindrical rollers or tapered rollers.

[0031] The storage space of the storage unit is divided into a plurality of storage channels parallel to each other, and the storage channels are arranged obliquely relative to the horizontal plane so as to facilitate the unpowered rolling of the bearing rollers in the storage channels under the action of their own gravity; the width of the storage channel matches the axial length of the bearing rollers so as to constrain the posture of the bearing rollers when rolling in the storage channel to avoid being stuck; the upper end of the storage channel is the channel entrance, and the lower end of the storage channel is the channel exit and is provided with an exit gate; the bearing rollers are sequentially stored in the storage channel in a single-line queue, with their axes parallel to each other and their rolling surfaces close to the rolling surfaces; the exit gate is in an open state when the bearing rollers are unloaded from the storage channel;

[0032] The material storage units are installed in layers in the material storage station;

[0033] The material receiving subsystem includes a material receiving mechanism, a pre-station material receiving unit and a pre-station transition unit;

[0034] The front-station material receiving unit and the front-station transition unit are both provided with a material storage channel consistent with that in the material storage unit;

[0035] The material receiving mechanism includes a U-shaped guide frame, a support base plate and a material receiving transition channel; the U-shaped guide frame is fixedly connected to the lower grinding disc (31), the U-shaped opening is opposite to the straight groove or the concave arc groove, and the inner width of the U-shaped guide frame matches the diameter of the bearing roller; the support base plate is fixedly connected to the bed of the circulating grinding equipment, arranged around the outer edge of the lower grinding disc, and set under the U-shaped guide frame; under the constraint guidance of the U-shaped guide frame and the support of the support base plate, the bearing roller maintains its posture in the grinding processing area during the process of leaving the grinding processing area from the outlet; the material receiving transition channel includes an arc channel, which is arranged around the outer edge of the lower grinding disc and docked with the support base plate, and the arc The channel starts from the docking point with the supporting base plate and gradually sinks to the end point of the arc channel to ensure that the U-shaped guide frame does not interfere with the bearing roller that gradually escapes from the constraint and guidance of the U-shaped guide frame when passing over the end point of the arc channel, and the width of the material receiving transition channel matches the axial length of the bearing roller to constrain the posture of the bearing roller when rolling along the material receiving transition channel to avoid being stuck; the material receiving transition channel is docked with the storage channel of the pre-station material receiving unit or the storage channel of the pre-station material receiving unit through the conveying mechanism, and the bearing roller enters the storage channel of the pre-station material receiving unit through the material receiving transition channel, or enters the storage channel of the pre-station material receiving unit through the material receiving transition channel and the conveying mechanism in sequence;

[0036] When the pre-station material receiving unit is fully loaded with the bearing rollers, the channel entrance of the pre-station transition unit is connected to the channel exit of the pre-station material receiving unit, and all the bearing rollers in the pre-station material receiving unit are transferred to the storage channel of the pre-station transition unit in a rolling manner, and the storage channel of the pre-station material receiving unit is emptied; the channel exit of the fully loaded pre-station transition unit is connected to the channel entrance of the empty storage unit in the storage station, and all the bearing rollers in the pre-station transition unit are loaded into the storage channel of the storage unit in a rolling manner;

[0037] The feeding subsystem includes a post-station transition unit, a post-station feeding unit and a feeding channel;

[0038] The post-station transition unit and the post-station feeding unit are both provided with a storage channel consistent with that in the storage unit; the feeding channel is provided in the upper space on the back side of the upper grinding disc and is communicated with the inlet;

[0039] According to the decision of the control subsystem, the channel entrance of the post-station transition unit is connected to the channel exit of the selected storage unit in the storage station, and all the bearing rollers in the storage unit are unloaded to the storage channel of the post-station transition unit in a rolling manner, and the storage channel of the storage unit is emptied; the channel exit of the fully loaded post-station transition unit is connected to the channel entrance of the post-station feeding unit, and all the bearing rollers in the post-station transition unit are transferred to the storage channel of the post-station feeding unit in a rolling manner; the channel exits of multiple storage channels of the post-station feeding unit are connected to the feeding channel one by one or are connected to the feeding channel one by one through the feeding transition channel to send the bearing rollers into the entrance through the feeding channel;

[0040] The feeding channel is a curved channel, a broken line channel or a zigzag combined channel; in the process of entering the entrance through the feeding channel, the bearing rollers from the post-station feeding unit roll in the feeding channel from top to bottom in a single-line queue, with axes parallel to each other and rolling surfaces close to rolling surfaces along a curved path, a broken line path or a zigzag combined path with the help of the bearing rollers' own weight; the width of the feeding channel matches the axial length of the bearing rollers to constrain the posture of the bearing rollers when rolling in the feeding channel to avoid getting stuck.

[0041] Furthermore, the external circulation system is suitable for a bearing roller rolling surface circulation grinding device equipped with a grinding disc kit, wherein the grinding disc kit includes a lower grinding disc and an upper grinding disc, and the front of the lower grinding disc is provided with a group of no less than 3 straight grooves distributed radially in a plane or radially distributed on a conical surface or radially distributed inward concave arc grooves, and the front of the upper grinding disc is correspondingly provided with a plane spiral groove or a conical surface spiral groove or an outward convex circular arc rotating surface spiral groove, and the entrance of the grinding processing area is provided at the plane spiral groove or the conical surface spiral groove or the outward convex circular arc rotating surface spiral groove The outlet of the grinding processing area is located adjacent to one end of the inner edge of the upper grinding disc and leads to the back of the upper grinding disc. The outlet of the grinding processing area is located at one end of the outer edge of the upper grinding disc in the corresponding plane spiral groove, conical spiral groove, or convex arc rotary spiral groove. During grinding, the bearing rollers continuously enter the grinding processing area from the inlet and continuously leave the grinding processing area from the outlet. The bearing rollers enter the grinding processing area from the inlet and leave the grinding processing area from the outlet synchronously with the grinding process. The bearing rollers are cylindrical rollers or tapered rollers.

[0042] The storage space of the storage unit is one or more vertical storage channels arranged in parallel, and the storage channels are curved channels, folded line channels or zigzag channels; during the process of storing or unloading the storage unit, the bearing rollers roll in the storage channel from top to bottom with the axes parallel to each other and the rolling surfaces close to the rolling surface by virtue of the deadweight of the bearing rollers; the width of the storage channel matches the axial length of the bearing rollers to constrain the posture of the bearing rollers when rolling in the storage channel to avoid being stuck; the upper end of the storage channel is the channel entrance, and the lower end of the storage channel is the channel exit and is provided with an exit gate; the bearing rollers are sequentially stored in the storage channel from bottom to top in a single-line queue, with the axes parallel to each other and the rolling surfaces close to the rolling surface; when the bearing rollers are unloaded from the storage channel, the exit gate is in an open state;

[0043] The storage station is provided with a transport robot, and the transport robot is used to move the storage unit;

[0044] The material receiving subsystem is provided with a material receiving mechanism;

[0045] The material receiving mechanism includes a U-shaped guide frame, a support base plate and a material receiving transition channel; the U-shaped guide frame is fixedly connected to the lower grinding disc (31), the U-shaped opening is opposite to the linear groove or the inwardly concave arc groove, and the inner width of the U-shaped guide frame matches the diameter of the bearing roller; the support base plate is fixedly connected to the bed of the circulating grinding equipment, arranged around the outer edge of the lower grinding disc, and arranged under the U-shaped guide frame; under the constraint guidance of the U-shaped guide frame and the support of the support base plate, the bearing roller maintains its posture in the grinding processing area during the process of leaving the grinding processing area from the outlet; the material receiving transition channel includes a circular arc channel, which is arranged around the outer edge of the lower grinding disc and docked with the support base plate. The arc channel gradually sinks from the docking point with the supporting base plate to the end point of the arc channel to ensure that the U-shaped guide frame does not interfere with the bearing roller that gradually escapes from the constraint and guidance of the U-shaped guide frame when passing over the end point of the arc channel, and the width of the material connection transition channel matches the axial length of the bearing roller to constrain the posture of the bearing roller when rolling along the material connection transition channel to avoid being stuck; the material connection transition channel is docked with the storage channel of the material storage unit or is docked with the storage channel of the material storage unit through a conveying mechanism, and the bearing roller enters the storage channel of the material storage unit through the material connection transition channel, or enters the storage channel of the material storage unit through the material connection transition channel and the conveying mechanism in sequence;

[0046] The handling robot removes an empty storage unit from the storage station and docks the channel entrance of the storage unit with the material receiving transition channel or the conveying mechanism to receive the bearing rollers from the material receiving mechanism; when the storage unit is fully loaded with the bearing rollers, the handling robot returns the storage unit to the storage station for temporary storage;

[0047] The feeding subsystem is provided with a feeding channel; the feeding channel is provided in the upper space on the back side of the upper grinding disc and is communicated with the inlet;

[0048] According to the decision of the control subsystem, the handling robot moves the selected storage unit in the storage station and docks the channel outlet of the storage unit with the feeding channel to unload the bearing roller;

[0049] The feeding channel is a curved channel, a folded line channel, or a zigzag channel; in the process of entering the inlet through the feeding channel, the bearing rollers from the storage unit roll in the feeding channel from top to bottom in a single-line queue, with axes parallel to each other and rolling surfaces close to rolling surfaces, along the curved path, folded line path, or zigzag path; the width of the feeding channel matches the axial length of the bearing rollers to constrain the posture of the bearing rollers when rolling in the feeding channel to avoid being stuck;

[0050] The material receiving subsystem may also be provided with a material receiving buffer station, the material receiving buffer station is provided with a material receiving station and a buffer station, the material receiving buffer station comprises a first bracket and a first guide rail, the first bracket is used to place the material storage unit, the first bracket together with the material storage unit thereon switches between the material receiving station and the buffer station along the first guide rail; the handling robot moves an empty material storage unit from the material storage station and places it on the first bracket located at the buffer station; the material storage unit located at the material receiving station moves along the first guide rail The channel entrance is connected to the material receiving transition channel or the conveying mechanism to receive the bearing rollers from the material receiving mechanism; when the storage unit located at the material receiving station is fully loaded with the bearing rollers, the fully loaded storage unit is switched to the buffer station, and the empty storage unit is switched to the material receiving station; the handling robot returns the fully loaded storage unit located at the buffer station to the storage station for temporary storage, and removes the empty storage unit from the storage station again and places it on the first bracket located at the buffer station, and repeats this process continuously;

[0051] The feeding subsystem may also be provided with a feeding buffer station, the feeding buffer station is provided with a feeding station and a buffer station, the feeding buffer station comprises a second bracket and a second guide rail, the second bracket is used to place the storage unit, the second bracket together with the storage unit thereon switches between the feeding station and the buffer station along the second guide rail; the handling robot moves out the fully loaded storage unit selected by the control subsystem from the storage station and places it on the second bracket located at the buffer station; the storage unit located at the feeding station switches along the second guide rail The second guide rail moves so that the channel outlet docks with the feeding channel to unload the bearing rollers; when the bearing rollers in the storage unit located at the feeding station are emptied, the empty storage unit is switched to the buffer station, and the fully loaded storage unit is switched to the feeding station; the handling robot returns the empty storage unit located at the buffer station to the storage station, and removes the fully loaded storage unit selected by the control subsystem from the storage station again and places it on the second bracket located at the buffer station, and repeats this process continuously.

[0052] Furthermore, the external circulation system is suitable for a bearing roller rolling surface circulation grinding device equipped with a sleeve-type grinding tool kit, wherein the grinding tool kit includes a horizontally arranged grinding shaft and a grinding sleeve, the outer peripheral surface of the grinding shaft is provided with a group of no less than three grinding shaft grooves distributed in a circumferential array, the inner wall of the grinding sleeve is provided with a cylindrical spiral groove, the inlet of the grinding processing area is provided at one end of the cylindrical spiral groove and leads to the upper half of the outer wall of the grinding sleeve, and the outlet of the grinding processing area is provided at the other end of the cylindrical spiral groove; during grinding processing, the bearing rollers continuously enter the grinding processing area from the inlet and continuously leave the grinding processing area from the outlet; the bearing rollers enter the grinding processing area from the inlet and leave the grinding processing area from the outlet synchronously with the grinding process; the bearing rollers are cylindrical rollers, tapered rollers or spherical rollers;

[0053] The storage space of the storage unit is divided into a plurality of storage channels parallel to each other, and the storage channels are arranged obliquely relative to the horizontal plane so as to facilitate the unpowered rolling of the bearing rollers in the storage channels under the action of their own gravity; the width of the storage channel matches the axial length of the bearing rollers so as to constrain the posture of the bearing rollers when rolling in the storage channel to avoid being stuck; the upper end of the storage channel is the channel entrance, and the lower end of the storage channel is the channel exit and is provided with an exit gate; the bearing rollers are sequentially stored in the storage channel in a single-line queue, with their axes parallel to each other and their rolling surfaces close to the rolling surfaces; the exit gate is in an open state when the bearing rollers are unloaded from the storage channel;

[0054] The material storage units are installed in layers in the material storage station;

[0055] The material receiving subsystem includes a material receiving channel, a pre-station material receiving unit and a pre-station transition unit;

[0056] The front-station material receiving unit and the front-station transition unit are both provided with a material storage channel consistent with that in the material storage unit;

[0057] The outlet of the grinding processing area is connected to the material storage channel of the material receiving unit before the station through the material receiving channel, or is connected to the material storage channel of the material receiving unit before the station through the material receiving channel and the conveying mechanism; during grinding processing, the bearing roller leaves the outlet and passes through the material receiving channel to enter the material storage channel of the material receiving unit before the station, or passes through the material receiving channel and the conveying mechanism in sequence to enter the material storage channel of the material receiving unit before the station;

[0058] When the pre-station material receiving unit is fully loaded with the bearing rollers, the channel entrance of the pre-station transition unit is connected to the channel exit of the pre-station material receiving unit, and all the bearing rollers in the pre-station material receiving unit are transferred to the storage channel of the pre-station transition unit in a rolling manner, and the storage channel of the pre-station material receiving unit is emptied; the channel exit of the fully loaded pre-station transition unit is connected to the channel entrance of the empty storage unit in the storage station, and all the bearing rollers in the pre-station transition unit are loaded into the storage channel of the storage unit in a rolling manner;

[0059] The feeding subsystem includes a post-station transition unit, a post-station feeding unit and a feeding channel;

[0060] The post-station transition unit and the post-station feeding unit are both provided with a storage channel consistent with that in the storage unit; the feeding channel is provided in the upper space of the outer wall of the grinding sleeve and is communicated with the inlet;

[0061] According to the decision of the control subsystem, the channel entrance of the post-station transition unit is connected to the channel exit of the selected storage unit in the storage station, and all the bearing rollers in the storage unit are unloaded to the storage channel of the post-station transition unit in a rolling manner, and the storage channel of the storage unit is emptied; the channel exit of the fully loaded post-station transition unit is connected to the channel entrance of the post-station feeding unit, and all the bearing rollers in the post-station transition unit are transferred to the storage channel of the post-station feeding unit in a rolling manner; the channel exits of multiple storage channels of the post-station feeding unit are connected to the feeding channel one by one or are connected to the feeding channel one by one through the feeding transition channel to send the bearing rollers into the entrance through the feeding channel;

[0062] The feeding channel is a curved channel, a broken line channel or a zigzag combined channel; in the process of entering the entrance through the feeding channel, the bearing rollers from the feeding unit after the station roll in the feeding channel from top to bottom in a single-line queue, with axes parallel to each other and rolling surfaces close to rolling surfaces along a curved path, a broken line path or a zigzag combined path with the help of the weight of the bearing rollers; the width of the feeding channel matches the axial length of the bearing rollers to constrain the posture of the bearing rollers when rolling in the feeding channel to avoid being stuck.

[0063] Furthermore, the external circulation system is suitable for a bearing roller rolling surface circulation grinding device equipped with a sleeve-type grinding tool kit, wherein the grinding tool kit includes a horizontally arranged grinding shaft and a grinding sleeve, the outer peripheral surface of the grinding shaft is provided with a group of no less than three grinding shaft grooves distributed in a circumferential array, the inner wall of the grinding sleeve is provided with a cylindrical spiral groove, the inlet of the grinding processing area is provided at one end of the cylindrical spiral groove and leads to the upper half of the outer wall of the grinding sleeve, and the outlet of the grinding processing area is provided at the other end of the cylindrical spiral groove; during grinding processing, the bearing rollers continuously enter the grinding processing area from the inlet and continuously leave the grinding processing area from the outlet; the bearing rollers enter the grinding processing area from the inlet and leave the grinding processing area from the outlet synchronously with the grinding process; the bearing rollers are cylindrical rollers, tapered rollers or spherical rollers;

[0064] The storage space of the storage unit is one or more vertical storage channels arranged in parallel, and the storage channels are curved channels, folded line channels or zigzag channels; during the process of storing or unloading the storage unit, the bearing rollers roll in the storage channel from top to bottom with the axes parallel to each other and the rolling surfaces close to the rolling surface by virtue of the deadweight of the bearing rollers; the width of the storage channel matches the axial length of the bearing rollers to constrain the posture of the bearing rollers when rolling in the storage channel to avoid being stuck; the upper end of the storage channel is the channel entrance, and the lower end of the storage channel is the channel exit and is provided with an exit gate; the bearing rollers are sequentially stored in the storage channel from bottom to top in a single-line queue, with the axes parallel to each other and the rolling surfaces close to the rolling surface; when the bearing rollers are unloaded from the storage channel, the exit gate is in an open state;

[0065] The storage station is provided with a transport robot, and the transport robot is used to move the storage unit;

[0066] The material receiving subsystem is provided with a material receiving channel;

[0067] The outlet of the grinding processing area is connected to the material storage channel of the material storage unit through the material receiving channel, or is connected to the material storage channel of the material storage unit through the material receiving channel and the conveying mechanism; during grinding processing, the bearing roller leaves the outlet and enters the material storage channel of the material storage unit through the material receiving channel, or enters the material storage channel of the material storage unit through the material receiving channel and the conveying mechanism in sequence;

[0068] The transport robot removes an empty storage unit from the storage station and docks the channel entrance of the storage unit with the receiving channel or the conveying mechanism to receive the bearing rollers from the receiving channel; when the storage unit is fully loaded with the bearing rollers, the transport robot returns the storage unit to the storage station for temporary storage;

[0069] The feeding subsystem is provided with a feeding channel; the feeding channel is provided in the upper space of the outer wall of the grinding sleeve and is communicated with the inlet;

[0070] According to the decision of the control subsystem, the handling robot moves the selected storage unit in the storage station and docks the channel outlet of the storage unit with the feeding channel to unload the bearing roller;

[0071] The feeding channel is a curved channel, a folded line channel, or a zigzag channel; in the process of entering the inlet through the feeding channel, the bearing rollers from the storage unit roll in the feeding channel from top to bottom in a single-line queue, with axes parallel to each other and rolling surfaces close to rolling surfaces, along the curved path, folded line path, or zigzag path; the width of the feeding channel matches the axial length of the bearing rollers to constrain the posture of the bearing rollers when rolling in the feeding channel to avoid being stuck;

[0072] The material receiving subsystem may also be provided with a material receiving buffer station, the material receiving buffer station is provided with a material receiving station and a buffer station, the material receiving buffer station comprises a first bracket and a first guide rail, the first bracket is used to place the material storage unit, the first bracket together with the material storage unit thereon switches between the material receiving station and the buffer station along the first guide rail; the handling robot moves an empty material storage unit from the material storage station and places it on the first bracket located at the buffer station; the material storage unit located at the material receiving station moves along the first guide rail The channel entrance is moved to connect with the material receiving channel or the conveying mechanism to receive the bearing rollers from the material receiving channel; when the storage unit located at the material receiving station is fully loaded with the bearing rollers, the fully loaded storage unit is switched to the buffer station, and the empty storage unit is switched to the material receiving station; the handling robot sends the fully loaded storage unit located at the buffer station back to the storage station for temporary storage, and removes the empty storage unit from the storage station again and places it on the first bracket located at the buffer station, and this process is repeated continuously;

[0073] The feeding subsystem may also be provided with a feeding buffer station, the feeding buffer station is provided with a feeding station and a buffer station, the feeding buffer station comprises a second bracket and a second guide rail, the second bracket is used to place the storage unit, the second bracket together with the storage unit thereon switches between the feeding station and the buffer station along the second guide rail; the handling robot moves out the fully loaded storage unit selected by the control subsystem from the storage station and places it on the second bracket located at the buffer station; the storage unit located at the feeding station switches along the second guide rail The second guide rail moves so that the channel outlet docks with the feeding channel to unload the bearing rollers; when the bearing rollers in the storage unit located at the feeding station are emptied, the empty storage unit is switched to the buffer station, and the fully loaded storage unit is switched to the feeding station; the handling robot returns the empty storage unit located at the buffer station to the storage station, and removes the fully loaded storage unit selected by the control subsystem from the storage station again and places it on the second bracket located at the buffer station, and repeats this process continuously.

[0074] Furthermore, the external circulation system is suitable for a bearing roller rolling surface circulation grinding device equipped with a shaft sleeve type grinding tool kit, the grinding tool kit includes a horizontally arranged grinding shaft and a grinding sleeve, the outer peripheral surface of the grinding shaft is provided with a group of no less than 3 linear grooves distributed in a circumferential array, the inner wall of the grinding sleeve is provided with a group of multiple coaxial annular grooves of equal diameter, corresponding to each annular groove, a through hole is provided for the bearing roller to enter the grinding processing area and leads to the upper half outer wall of the grinding sleeve, the through hole is both the entrance for the bearing roller to enter the grinding processing area and the exit for the bearing roller to leave the grinding processing area; the bearing roller enters the grinding processing area from the through hole or leaves the grinding processing area from the through hole in a time-sharing manner with the grinding process, and the grinding process is suspended during the period when the bearing roller enters or leaves the grinding processing area; the bearing roller is a cylindrical roller, a tapered roller or a spherical roller;

[0075] The storage space of the storage unit is divided into a plurality of storage channels parallel to each other, and the storage channels are arranged obliquely relative to the horizontal plane so as to facilitate the unpowered rolling of the bearing rollers in the storage channels under the action of their own gravity; the width of the storage channel matches the axial length of the bearing rollers so as to constrain the posture of the bearing rollers when rolling in the storage channel to avoid being stuck; the upper end of the storage channel is the channel entrance, and the lower end of the storage channel is the channel exit and is provided with an exit gate; the bearing rollers are sequentially stored in the storage channel in a single-line queue, with their axes parallel to each other and their rolling surfaces close to the rolling surfaces; the exit gate is in an open state when the bearing rollers are unloaded from the storage channel;

[0076] The material storage units are installed in layers in the material storage station;

[0077] The material receiving subsystem includes a unloading robot, a front-station material receiving unit and a front-station transition unit;

[0078] The front-station material receiving unit and the front-station transition unit are both provided with a material storage channel consistent with that in the material storage unit;

[0079] The feeding subsystem includes a post-station transition unit, a post-station feeding unit and a loading robot;

[0080] The post-station transition unit and the post-station feeding unit are both provided with a storage channel consistent with that in the storage unit;

[0081] The loading robot and the unloading robot are both provided with a group of parallel arranged finger-shaped grippers, the ends of the finger-shaped grippers are provided with suction cups for adsorbing the bearing rollers, and the suction cups are vacuum suction cups or electromagnetic suction cups;

[0082] Whenever the bearing roller in the grinding processing area completes a round of grinding processing, unloading and loading work is carried out once; the grinding shaft is rotated until a certain linear groove is opposite to the through-port, and the finger-shaped clamp of the unloading robot is respectively inserted into each through-port, and a bearing roller located in the linear groove is adsorbed and taken out from each through-port in parallel, and then the bearing rollers are respectively placed in each storage channel of the station front receiving unit or placed on the conveying mechanism. The bearing rollers placed on the conveying mechanism pass through the conveying mechanism and enter each storage channel of the station front receiving unit; the finger-shaped clamp of the loading robot enters the station rear feeding unit from the station rear feeding unit Each storage channel of the grinding machine simultaneously absorbs and takes out a bearing roller, and then places the bearing roller into the linear groove through each opening according to the posture requirement of the grinding processing area for the bearing roller, and the finger-shaped clamp withdraws from the opening; the grinding shaft is continued to rotate until the next linear groove is opposite to the opening, and the above operation is repeated until all the bearing rollers of the previous round of grinding processing are unloaded from the grinding processing area and the subsequent bearing rollers are loaded, and the grinding process continues; during each round of grinding processing, the average material removal amount of the bearing roller in the diameter direction must be controlled within 0.5 microns;

[0083] When the pre-station material receiving unit is fully loaded with the bearing rollers, the channel entrance of the pre-station transition unit is connected to the channel exit of the pre-station material receiving unit, and all the bearing rollers in the pre-station material receiving unit are transferred to the storage channel of the pre-station transition unit in a rolling manner, and the storage channel of the pre-station material receiving unit is emptied; the channel exit of the fully loaded pre-station transition unit is connected to the channel entrance of the empty storage unit in the storage station, and all the bearing rollers in the pre-station transition unit are loaded into the storage channel of the storage unit in a rolling manner;

[0084] According to the decision of the control subsystem, the channel entrance of the post-station transition unit is connected to the channel exit of the selected storage unit in the storage station, and all the bearing rollers in the storage unit are unloaded to the storage channel of the post-station transition unit in a rolling manner, and the storage channel of the storage unit is emptied; the channel exit of the fully loaded post-station transition unit is connected to the channel entrance of the post-station feeding unit, and all the bearing rollers in the post-station transition unit are transferred to the storage channel of the post-station feeding unit in a rolling manner.

[0085] At the same time, the present invention also proposes another external circulation system for cyclic grinding of the rolling surface of a bearing roller, comprising a material receiving mechanism, a lifting mechanism and a material feeding channel;

[0086] The receiving mechanism is used to deliver the bearing rollers leaving the exit of the grinding processing area into the lifting mechanism in a queue and posture-controlled manner to prevent the bearing rollers from being damaged by collision with each other;

[0087] The lifting mechanism is used to lift the bearing rollers upward in a single, isolated, single-line, and posture-controlled manner to dock with the feed channel or dock with the feed channel through a conveying mechanism. The bearing rollers enter the feed channel through the lifting mechanism or enter the feed channel through the lifting mechanism and the conveying mechanism in sequence.

[0088] The feed channel is a curved channel, a folded line channel, or a zigzag channel. In the process of entering the entrance of the grinding processing area through the feed channel, the bearing rollers from the lifting mechanism or the conveying mechanism roll in the feed channel from top to bottom in a single-line queue, with axes parallel to each other and rolling surfaces close to rolling surfaces, along the curved path, folded line path, or zigzag path. The width of the feed channel matches the axial length of the bearing rollers to constrain the posture of the bearing rollers when rolling in the feed channel to prevent them from getting stuck.

[0089] A grinding cycle is a process in which all the bearing rollers enter the grinding processing area from the entrance, undergo grinding in the grinding processing area, and leave the grinding processing area from the exit. As the number of grinding cycles increases, the selective material removal effect between the bearing rollers in the grinding processing area gradually extends to the entire batch of bearing rollers, and the dimensional consistency of the bearing rollers continues to improve until the specified technical indicators are reached.

[0090] Furthermore, the external circulation system is suitable for a bearing roller rolling surface circulation grinding device equipped with a grinding disc kit, wherein the grinding disc kit includes a lower grinding disc and an upper grinding disc, and the front of the lower grinding disc is provided with a group of no less than 3 straight grooves distributed radially in a plane or radially distributed on a conical surface or radially distributed inward concave arc grooves, and the front of the upper grinding disc is correspondingly provided with a plane spiral groove or a conical surface spiral groove or an outward convex circular arc rotating surface spiral groove, and the entrance of the grinding processing area is provided at the plane spiral groove or the conical surface spiral groove or the outward convex circular arc rotating surface spiral groove The outlet of the grinding processing area is located adjacent to one end of the inner edge of the upper grinding disc and leads to the back of the upper grinding disc. The outlet of the grinding processing area is located at one end of the outer edge of the upper grinding disc in the corresponding plane spiral groove, conical spiral groove, or convex arc rotary spiral groove. During grinding, the bearing rollers continuously enter the grinding processing area from the inlet and continuously leave the grinding processing area from the outlet. The bearing rollers enter the grinding processing area from the inlet and leave the grinding processing area from the outlet synchronously with the grinding process. The bearing rollers are cylindrical rollers or tapered rollers.

[0091] The material receiving mechanism includes a U-shaped guide frame, a supporting base plate and a material receiving transition channel; the U-shaped guide frame is fixedly connected to the lower grinding disc, the U-shaped opening is opposite to the straight groove or the concave arc groove, and the inner width of the U-shaped guide frame matches the diameter of the bearing roller; the supporting base plate is fixedly connected to the bed of the circulating grinding equipment, arranged around the outer edge of the lower grinding disc, and set under the U-shaped guide frame; under the constraint guidance of the U-shaped guide frame and the support of the supporting base plate, the bearing roller maintains its posture in the grinding processing area during the process of leaving the grinding processing area from the outlet; the material receiving transition channel includes a circular arc channel, which is arranged around the outer edge of the lower grinding disc, The supporting base plate is docked, and the arc channel gradually sinks from the docking point with the supporting base plate to the end point of the arc channel to ensure that the U-shaped guide frame does not interfere with the bearing roller that gradually escapes from the constraint and guidance of the U-shaped guide frame when passing over the end point of the arc channel. The width of the material connection transition channel matches the axial length of the bearing roller to constrain the posture of the bearing roller when rolling along the material connection transition channel to avoid being stuck; the material connection transition channel is docked with the lifting mechanism or is docked with the lifting mechanism through the conveying mechanism, and the bearing roller enters the lifting mechanism through the material connection transition channel, or enters the lifting mechanism through the material connection transition channel and the conveying mechanism in sequence;

[0092] The feeding channel is arranged in the upper space of the back side of the upper grinding disc and is communicated with the inlet.

[0093] Furthermore, the external circulation system is suitable for a bearing roller rolling surface circulation grinding device equipped with a sleeve-type grinding tool kit, wherein the grinding tool kit includes a horizontally arranged grinding shaft and a grinding sleeve, the outer peripheral surface of the grinding shaft is provided with a group of no less than three grinding shaft grooves distributed in a circumferential array, the inner wall of the grinding sleeve is provided with a cylindrical spiral groove, the inlet of the grinding processing area is provided at one end of the cylindrical spiral groove and leads to the upper half of the outer wall of the grinding sleeve, and the outlet of the grinding processing area is provided at the other end of the cylindrical spiral groove; during grinding processing, the bearing rollers continuously enter the grinding processing area from the inlet and continuously leave the grinding processing area from the outlet; the bearing rollers enter the grinding processing area from the inlet and leave the grinding processing area from the outlet synchronously with the grinding process; the bearing rollers are cylindrical rollers, tapered rollers or spherical rollers;

[0094] The material receiving mechanism is provided with a material receiving channel;

[0095] The outlet of the grinding processing area is connected to the lifting mechanism through the material receiving channel or connected to the lifting mechanism through the material receiving channel and the conveying mechanism; during grinding processing, the bearing roller leaves the outlet and enters the lifting mechanism through the material receiving channel, or enters the lifting mechanism through the material receiving channel and the conveying mechanism in sequence;

[0096] The feeding channel is arranged in the upper space of the outer wall of the grinding sleeve and is communicated with the inlet.

[0097] Compared with the prior art, the present invention has the following beneficial effects:

[0098] On the one hand, in the two external circulation systems for cyclic grinding of the rolling surface of bearing rollers proposed in the embodiments of the present invention, the bearing rollers are always in a state of orderly position and controlled posture, which can effectively avoid non-negligible bumps and scratches on the surface of the bearing rollers during the external circulation process. On the other hand, in the first external circulation system for cyclic grinding of the rolling surface of bearing rollers proposed in the embodiments of the present invention, in the process of the bearing rollers entering the inlet from the outlet through the external circulation system, the first-in-first-out and fixed feeding order is broken according to certain rules, which is conducive to overcoming the disadvantage of the fixed feeding order that the bearing rollers that are far apart in the bearing roller queue cannot be compared with each other in the grinding processing area, thereby improving the dimensional consistency convergence efficiency of the bearing rollers. BRIEF DESCRIPTION OF THE DRAWINGS

[0099] Figure 1 This is a schematic diagram of the logistics of cylindrical rollers in the external circulation system disclosed in patent document CN113524018A;

[0100] Figure 2 This is a schematic diagram of the logistics of tapered rollers in the external circulation system disclosed in patent document CN113601277A;

[0101] Figure 3 This is a schematic diagram of the logistics of the spherical roller in the external circulation system disclosed in patent document CN113524014A;

[0102] Figure 4 This is a schematic diagram of the logistics of cylindrical rollers in the external circulation system disclosed in patent document CN108908094A;

[0103] Figure 5 This is a schematic diagram of the logistics of the arc-shaped convex cylindrical roller in the external circulation system disclosed in patent document CN108890516A;

[0104] Figure 6 This is a schematic diagram of the logistics of tapered rollers in the external circulation system disclosed in patent document CN108723979A;

[0105] Figure 7This is a schematic diagram of the logistics of the arc convex tapered roller in the external circulation system disclosed in patent document CN108673331A;

[0106] Figure 8 It is a schematic diagram of the inlet and outlet of the grinding processing area when the grinding tool kit includes a grinding shaft and a grinding sleeve, and the inner wall of the grinding sleeve is provided with a set of multiple coaxial annular grooves of equal diameter;

[0107] Figure 9 It is a schematic diagram of the structure of cylindrical roller;

[0108] Figure 10 It is a schematic diagram of the structure of the tapered roller;

[0109] Figure 11 It is a schematic diagram of the structure of the spherical roller;

[0110] Figure 12 It is a schematic diagram of the structure of the needle roller;

[0111] Figure 13 It is a schematic diagram of the inlet and outlet of the grinding processing area when the grinding disc set includes upper and lower grinding discs;

[0112] Figure 14 This is a schematic diagram of a storage unit when the storage channel is arranged horizontally and tilted;

[0113] Figure 15 This is a schematic diagram of the operation of the storage station, the material receiving subsystem and the material feeding subsystem when the storage channel of the storage unit is arranged horizontally and tilted;

[0114] Figure 16 It is a schematic diagram of the material receiving mechanism;

[0115] Figure 17 The feeding channel is arranged on the upper space on the back of the upper grinding disc and is connected to the inlet;

[0116] Figure 18 This is a schematic diagram of a storage unit when the storage channel is arranged vertically;

[0117] Figure 19 This is a schematic diagram of a storage station when the storage channel of the storage unit is arranged vertically;

[0118] Figure 20 This is a schematic diagram of the material receiving buffer station;

[0119] Figure 21 This is a schematic diagram of the feeding buffer station;

[0120] Figure 22 Schematic diagram of the inlet and outlet of the grinding processing area when the grinding tool kit includes a grinding shaft and a grinding sleeve, and the inner wall of the grinding sleeve is provided with a cylindrical spiral groove;

[0121] Figure 23This is a diagram of the spherical roller entering the conveyor belt from the outlet through the material receiving channel;

[0122] Figure 24 This is a diagram of the cylindrical roller entering the conveyor belt from the outlet through the material receiving channel;

[0123] Figure 25 The feeding channel is arranged in the upper space of the outer wall of the grinding sleeve and is connected to the inlet;

[0124] Figure 26 This is a diagram of the unloading robot taking out the tapered roller from the outlet and placing it on the conveyor belt;

[0125] Figure 27 This is the second operation diagram of the storage station, material receiving subsystem and material feeding subsystem when the storage channel of the storage unit is arranged horizontally and inclined.

[0126] In the picture:

[0127] 11- cylindrical roller; 12- tapered roller; 13- spherical roller; 14- axis of bearing roller; 15- rolling surface; 21- linear groove;

[0128] 22- plane spiral groove; 23- cylindrical spiral groove; 24- annular groove;

[0129] 31- lower grinding disc; 32- upper grinding disc; 33- grinding sleeve;

[0130] 41- inlet; 42- outlet; 43- collection unit; 44- transmission subsystem; 45- sorting unit; 46- feeding unit; 47- feeding channel;

[0131] 5-External circulatory system;

[0132] 61-Storage unit; 62-Exit gate; 63-Storage channel; 64-Transportation robot;

[0133] 71-U-shaped guide frame; 72-support bottom plate; 73-material receiving channel; 74-conveyor belt; 75-material receiving transition channel; 76-arc channel; 78-pre-station material receiving unit; 79-pre-station transition unit;

[0134] 81-post-station transition unit; 82-post-station feeding unit; 83-feeding channel; 84-feeding transition channel;

[0135] 91 - first bracket; 91' - second bracket; 92 - first guide rail; 92' - second guide rail; 93 - finger-shaped gripper; 94 - suction cup. DETAILED DESCRIPTION

[0136] The present invention will be further described below in conjunction with the accompanying drawings. The embodiments described with reference to the accompanying drawings are illustrative and intended to explain the present invention, and should not be construed as limiting the scope of the present invention. Furthermore, the dimensions, materials, shapes, and relative arrangements of the components described in the following embodiments do not limit the scope of the present invention to these dimensions, materials, and relative arrangements, unless otherwise specified.

[0137] The bearing rollers described in the present invention specifically refer to the bearing rollers being processed. The grinding processing area described in the present invention refers to the area where the bearing rollers undergo grinding. During grinding processing, the bearing rollers enter the grinding processing area from the inlet 41 of the grinding processing area and leave the grinding processing area from the outlet 42 of the grinding processing area. The bearing rollers are cylindrical rollers 11, tapered rollers 12, or spherical rollers 13. The cylindrical rollers 11 include cylindrical rollers with circular arc convexity, the tapered rollers 12 include tapered rollers with circular arc convexity, and the types of spherical rollers 13 include symmetrical spherical rollers without a spherical base surface, symmetrical spherical rollers with a spherical base surface, and asymmetrical spherical rollers. The present invention classifies needle rollers as the cylindrical rollers 11. Figure 9 The figure shows the structure of the cylindrical roller 11. Figure 10 The figure shows the structure of the tapered roller 12. Figure 11 The figure shows the structure of the symmetrical spherical roller 13 without a spherical base surface. Figure 12 The figure shows a schematic diagram of the structure of the needle roller. Figure 9 、 Figure 10 、 Figure 11 and Figure 12 In the figure, reference numeral 14 indicates the axis of the bearing roller, and reference numeral 15 indicates the rolling surface of the bearing roller.

[0138] The conveying mechanism described in the present invention is used to transport the bearing rollers from one place to another in a single-line queue and posture-controlled manner. The conveying mechanism is a conveying mechanism in the prior art such as a flat belt conveying mechanism, a double-circular belt conveying mechanism, or a conveying mechanism developed in the future that can be used for the purpose described in the present invention. The present invention does not limit the structure of the conveying mechanism.

[0139] The lifting mechanism described in the present invention is used to lift the bearing roller from a low place to a high place in a single-isolated, single-line queue, and posture-controlled manner. The lifting mechanism is a lifting mechanism in the existing technology such as a push plate lifting mechanism, a chain plate lifting mechanism, etc., or a lifting mechanism developed in the future that can be used for the purpose described in the present invention. The present invention does not limit the structure of the lifting mechanism.

[0140] Example 1: An external circulation system for cyclic grinding of the rolling surface of bearing rollers

[0141] The external circulation system 5 is suitable for a bearing roller rolling surface circulation grinding device equipped with a grinding disc kit, wherein the grinding disc kit includes a lower grinding disc 31 and an upper grinding disc 32, and the front of the lower grinding disc 31 is provided with a group of no less than 3 straight grooves 21 distributed radially in a plane or radially distributed on a conical surface, or radially distributed inward concave arc grooves, and the front of the upper grinding disc 32 is correspondingly provided with a plane spiral groove or a conical surface spiral groove or an outward convex circular arc rotating surface spiral groove, and the entrance 41 of the grinding processing area is provided at the inner edge end of the plane spiral groove or the conical surface spiral groove or the outward convex circular arc rotating surface spiral groove adjacent to the upper grinding disc 32 and leads to the back side of the upper grinding disc 32, and the outlet 42 of the grinding processing area is at the outer edge end of the corresponding plane spiral groove or the conical surface spiral groove or the outward convex circular arc rotating surface spiral groove adjacent to the upper grinding disc 32. During the grinding process, the bearing rollers continuously enter the grinding zone from the inlet 41 and continuously exit the grinding zone from the outlet 42. The bearing rollers enter the grinding zone from the inlet 41 and exit the grinding zone from the outlet 42 synchronously with the grinding process. The bearing rollers are cylindrical rollers 11 or tapered rollers 12. Figure 13 The figure shows the entrance and exit of the grinding processing area when the front surface of the lower grinding disc 31 of the grinding disc set is provided with linear grooves 21 distributed in a plane radial pattern and the front surface of the upper grinding disc 32 is provided with planar spiral grooves 22.

[0142] The external circulation system 5 includes a material receiving subsystem, a material feeding subsystem, a material storage station, a plurality of material storage units 61 and a control subsystem.

[0143] The storage station is used to store the storage unit 61. The storage unit 61 is used to temporarily store the bearing rollers. The bearing rollers are sequentially stored in the storage channel 63 of the storage unit 61 in a single-line queue with their axes parallel to each other and the rolling surfaces 15 close to the rolling surfaces 15 to reduce the mutual collision between the bearing rollers and avoid collision damage. The storage channel 63 gradually transitions from the channel entrance to the channel exit from top to bottom to facilitate the unpowered rolling of the bearing rollers in the storage channel 63 under the action of their own gravity. The storage unit 61 is the hardware basis for adjusting the order and position of the bearing rollers in the bearing roller queue in blocks under the condition that there is no physical contact between the bearing rollers loaded in different storage units 61. The bearing roller queue is a closed-loop queue that includes all bearing rollers in the grinding processing area and the external circulation system 5.

[0144] like Figure 14As shown, the storage space of the storage unit 61 is divided into a plurality of storage channels 63 parallel to each other. The storage channels 63 are arranged obliquely relative to the horizontal plane to facilitate the unpowered rolling of the bearing rollers in the storage channels 63 under the action of their own gravity. The width of the storage channel 63 matches the axial length of the bearing rollers to constrain the posture of the bearing rollers when rolling in the storage channel 63 to avoid being stuck. The upper end of the storage channel 63 is the channel entrance, and the lower end of the storage channel 63 is the channel exit and is provided with an exit gate 62. The bearing rollers are sequentially stored in the storage channel 63 in a single-line queue, with the axes parallel to each other and the rolling surfaces 15 close to the rolling surfaces 15. When the bearing rollers are unloaded from the storage channel 63, the exit gate 62 is in an open state.

[0145] like Figure 15 As shown, the storage units 61 are installed in layers in the storage station.

[0146] The material receiving subsystem is used to load the bearing rollers leaving the outlet 42 into the empty storage unit 61 in a queue and posture-controlled manner to prevent the bearing rollers from being damaged by collisions with each other.

[0147] The material receiving subsystem includes a material receiving mechanism, a pre-station material receiving unit 78 and a pre-station transition unit 79.

[0148] The pre-station material receiving unit 78 and the pre-station transition unit 79 are both provided with a material storage channel 63 consistent with that in the material storage unit 61 .

[0149] The material receiving mechanism includes a U-shaped guide frame 71, a support base 72, and a material receiving transition channel 75. The U-shaped guide frame 71 is fixedly connected to the lower grinding disc 31, with the U-shaped opening facing the linear groove 21 or the inwardly concave arc groove. The inner width of the U-shaped guide frame 71 matches the diameter of the bearing roller. The U-shaped guide frame 71 is located outside the lower grinding disc 31, replacing the linear groove 21 or the inwardly concave arc groove to constrain and guide the bearing roller. The support base 72 is fixedly connected to the bed of the circulating grinding machine, arranged around the outer edge of the lower grinding disc 31, and disposed below the U-shaped guide frame 71. The support base 72 supports the bearing roller outside the lower grinding disc 31, replacing the linear groove 21 or the inwardly concave arc groove. Under the restraint and guidance of the U-shaped guide frame 71 and the support of the support base 72, the bearing roller maintains its original position in the grinding process area during its exit from the exit 42. The material connection transition channel 75 includes an arc channel 76, which is arranged around the outer edge of the lower grinding disc 31 and docked with the support base plate 72. The arc channel 76 gradually sinks from the docking point with the support base plate 72 to the end point of the arc channel 76 to ensure that the U-shaped guide frame 71 does not interfere with the bearing roller that gradually breaks away from the constraint and guidance of the U-shaped guide frame 71 when passing over the end point of the arc channel 76. The width of the material connection transition channel 75 matches the axial length of the bearing roller to constrain the posture of the bearing roller when rolling along the material connection transition channel 75 to avoid being stuck. The material receiving transition channel 75 is connected to the material storage channel 63 of the pre-station material receiving unit 78 or is connected to the material storage channel 63 of the pre-station material receiving unit 78 through the conveying mechanism, and the bearing roller enters the material storage channel 63 of the pre-station material receiving unit 78 through the material receiving transition channel 75, or enters the material storage channel 63 of the pre-station material receiving unit 78 through the material receiving transition channel 75 and the conveying mechanism in sequence. Figure 16 This is a schematic diagram of the material receiving mechanism. The front of the lower grinding disc shown in the figure is provided with linear grooves 21 distributed radially in a plane. The figure also shows the docking relationship between the material receiving transition channel 75 and the conveyor belt 74. The bearing roller enters the conveyor belt 74 through the material receiving transition channel 75. How the bearing roller enters the storage channel 63 of the pre-station material receiving unit 78 from the conveying mechanism is not the inventive point of this embodiment. Depending on the specific application scenario, those skilled in the art can design a variety of technical solutions based on existing technologies or simple combinations of existing technologies to solve this problem. This embodiment does not limit these technical solutions and their implementation structures.

[0150] like Figure 15As shown, the channel entrances of the multiple storage channels of the pre-station material receiving unit 78 are successively connected to the material receiving transition channel 75 or the conveying mechanism to receive the bearing rollers from the material receiving mechanism (the pre-station material receiving unit 78 in the figure is receiving the tapered rollers 12 from the material receiving mechanism). When the pre-station material receiving unit 78 is fully loaded with the bearing rollers, the channel entrance of the pre-station transition unit 79 is connected to the channel outlet of the pre-station material receiving unit 78, and all the bearing rollers in the pre-station material receiving unit 78 are transferred to the storage channel 63 of the pre-station transition unit 79 in a rolling manner, and the storage channel 63 of the pre-station material receiving unit 78 is emptied. The channel outlet of the fully loaded pre-station transition unit 79 is connected to the channel entrance of the unloaded storage unit 61 in the storage station, and all the bearing rollers in the pre-station transition unit 79 are loaded into the storage channel 63 of the storage unit 61 in a rolling manner (the pre-station transition unit 79 in the figure is loading the tapered rollers 12 into the storage unit 61).

[0151] The feeding subsystem is used to unload the bearing rollers from the storage unit 61 selected in the storage station according to the decision of the control subsystem, and load them into the entrance 41 in an orderly manner according to the posture requirements of the grinding processing area for the bearing rollers in a queue and posture-controlled manner, and avoid the bearing rollers from being damaged by collisions with each other.

[0152] The feeding subsystem includes a post-station transition unit 81 , a post-station feeding unit 82 and a feeding channel 83 .

[0153] The post-station transition unit 81 and the post-station feeding unit 82 are both provided with a storage channel 63 that is consistent with the storage unit 61. The feeding channel 83 is provided in the upper space on the back of the upper grinding disc 32 and is connected to the inlet 41. Figure 17 shown.

[0154] According to the decision of the control subsystem, such as Figure 15As shown, the channel entrance of the post-station transition unit 81 is connected to the channel exit of the selected storage unit 61 in the storage station, and all the bearing rollers in the storage unit 61 are unloaded to the storage channel 63 of the post-station transition unit 81 in a rolling manner (the post-station transition unit 81 in the figure is unloading the tapered rollers 12 from the storage unit 61), and the storage channel 63 of the storage unit 61 is emptied. The channel exit of the fully loaded post-station transition unit 81 is connected to the channel entrance of the post-station feeding unit 82, and all the bearing rollers in the post-station transition unit 81 are transferred to the storage channel 63 of the post-station feeding unit 82 in a rolling manner. The channel outlets of the multiple storage channels of the post-station feeding unit 82 are successively connected to the feeding channel 83 or are successively connected to the feeding channel 83 through the feeding transition channel 84 to deliver the bearing roller into the inlet 41 through the feeding channel 83 (the post-station feeding unit 82 in the figure is successively connected to the feeding channel 83 through the feeding transition channel 84).

[0155] The feeding channel 83 is a curved channel, a broken line channel or a zigzag channel. Figure 17 As shown, as the bearing rollers from the post-station feeding unit 82 enter the inlet 41 through the feed channel 83, they roll in the feed channel 83 from top to bottom under their own weight, in a single-line formation, with their axes parallel to each other and their rolling surfaces 15 close to each other, along a curved path, a broken line path, or a combination of curved and zigzag paths. The width of the feed channel 83 matches the axial length of the bearing rollers to constrain the bearing rollers' rolling posture within the feed channel 83 and prevent them from becoming stuck. The length of the feed channel 83 is sufficient to accommodate dozens or more bearing rollers.

[0156] The bearing rollers in the same storage channel 63 enter the storage channel 63 from the channel entrance and leave the storage channel 63 from the channel exit in the order of first-in-first-out and last-in-last-out.

[0157] The control subsystem is used to decide when to unload the bearing rollers from which storage unit 61. The control subsystem is the software basis for adjusting the order and position of the bearing rollers in the bearing roller queue in blocks without physical contact between the bearing rollers loaded in different storage units 61.

[0158] During grinding processing, the bearing rollers that have completed one grinding process in the grinding processing area leave the grinding processing area from the outlet 42. The bearing rollers leaving the grinding processing area are temporarily stored in the unloaded storage unit 61 and stored in the storage station. According to the decision of the control subsystem, the bearing rollers are unloaded from the storage unit 61 selected in the storage station and sent to the grinding processing area from the entrance 41 to continue to receive grinding processing. The order and position of the bearing rollers sent to the grinding processing area in the bearing roller queue are updated according to the decision of the control subsystem, thereby realizing the block mixed replacement of the bearing rollers without physical contact between the bearing rollers loaded in different storage units 61.

[0159] The process in which all the bearing rollers enter the grinding processing area from the inlet 41 , undergo grinding in the grinding processing area, and leave the grinding processing area from the outlet 42 is one grinding cycle.

[0160] The changes in the order and position of the bearing rollers exiting the grinding zone through the outlet 42 within the outer circulation system 5 alter the roller assembly upon subsequent entry into the grinding zone, thereby extending the selective material removal effect occurring between the rollers within the grinding zone to the entire batch of rollers. As the number of grinding cycles increases, the dimensional consistency of the bearing rollers continues to improve until it reaches the specified technical specifications.

[0161] To improve the dimensional consistency of the bearing rollers, a feed sequence rule is established for loading the bearing rollers into the inlet 41. This feed sequence rule is also used to plan the timing of unloading the bearing rollers from the storage units 61 during the grinding process. This feed sequence rule ensures that all bearing rollers undergo a similar number of grinding cycles while also minimizing the order and positional characteristics of the bearing rollers in the bearing roller queue when compared with each other in the grinding process area.

[0162] On the one hand, the external circulation system 5 is used to cope with the grinding processing of large quantities of bearing rollers that exceeds the capacity of the grinding processing area; on the other hand, it is used to establish a logistics channel for the bearing rollers between the outlet 42 and the inlet 41; and on the other hand, it is used to mix and replace the bearing rollers to weaken the order and position characteristics of the bearing rollers in the bearing roller queue.

[0163] During the logistics process of the bearing rollers from the outlet 42 to the inlet 41 through the external circulation system 5, the first-in-first-out, fixed feeding order is broken according to certain rules, which is helpful to overcome the disadvantage that the bearing rollers that are far apart in the bearing roller queue cannot be compared with each other in the grinding processing area due to the fixed feeding order.

[0164] During the logistics process of the external circulation system 5, the bearing rollers are temporarily stored in the storage unit 61 in an orderly manner, and then unloaded from the selected storage unit 61 according to the planned sequence and loaded into the inlet 41 in an orderly manner, which can effectively avoid surface damage caused by collisions between the bearing rollers.

[0165] Example 2: An external circulation system for cyclic grinding of the rolling surface of bearing rollers

[0166] The main differences between the external circulation system described in Example 1 are:

[0167] The storage space of the storage unit 61 is one or more vertical storage channels 63 arranged in parallel. The storage channels 63 are curved channels, broken-line channels or zigzag channels. Figure 18 The storage space of the storage unit 61 shown has three storage channels 63. During the process of storing or unloading materials from the storage unit 61, the bearing rollers roll from top to bottom within the storage channels 63 under their own weight, with their axes parallel to each other and their rolling surfaces 15 in close proximity to each other, along a curved path, a broken line path, or a combination of curved and zigzag paths. The width of the storage channels 63 matches the axial length of the bearing rollers to constrain the rollers' rolling posture within the storage channels 63 and prevent them from becoming stuck. The upper end of the storage channels 63 serves as the channel entrance, while the lower end serves as the channel exit, equipped with an exit gate 62. The bearing rollers are sequentially stored in the storage channels 63 from bottom to top in a single-line arrangement, with their axes parallel to each other and their rolling surfaces 15 in close proximity to each other. The exit gate 62 is open when the bearing rollers are unloaded from the storage channels 63.

[0168] like Figure 19 As shown, the storage station is provided with a transport robot 64 , and the transport robot 64 is used to move the storage unit 61 .

[0169] The material receiving subsystem is provided with a material receiving mechanism as described in Example 1.

[0170] The material receiving transition channel 75 is connected to the material storage channel 63 of the material storage unit 61 or is connected to the material storage channel 63 of the material storage unit 61 through a conveying mechanism, and the bearing roller enters the material storage channel 63 of the material storage unit 61 through the material receiving transition channel 75, or enters the material storage channel 63 of the material storage unit 61 through the material receiving transition channel 75 and the conveying mechanism in sequence.

[0171] The handling robot 64 removes an empty storage unit 61 from the storage station and connects the channel entrance of the storage unit 61 to the material receiving transition channel 75 or the conveying mechanism to receive the bearing rollers from the material receiving mechanism. When the storage unit 61 is fully loaded with the bearing rollers, the handling robot 64 returns the storage unit 61 to the storage station for temporary storage.

[0172] The feeding subsystem is provided with a feeding channel 83 as described in Example 1.

[0173] According to the decision of the control subsystem, the handling robot 64 moves the selected storage unit 61 in the storage station and docks the channel outlet of the storage unit 61 with the feeding channel 83 to unload the bearing rollers.

[0174] like Figure 20 As shown, the material receiving subsystem may also be provided with a material receiving buffer station, which is equipped with a material receiving station and a buffer station. The material receiving buffer station includes a first bracket 91 and a first guide rail 92. The first bracket 91 is used to accommodate the material storage unit 61. The first bracket 91, together with the material storage unit 61 mounted thereon, switches between the material receiving station and the buffer station along the first guide rail 92. The handling robot 64 removes an empty material storage unit 61 from the material storage station and places it on the first bracket 91 located at the buffer station. The material storage unit 61 at the material receiving station moves along the first guide rail 92 so that the channel entrance aligns with the material receiving transition channel 75 or the conveying mechanism to receive the bearing rollers from the material receiving mechanism. When the material storage unit 61 at the material receiving station is fully loaded with the bearing rollers, the fully loaded material storage unit 61 switches to the buffer station, and the empty material storage unit 61 switches to the material receiving station. The handling robot 64 sends the fully loaded storage unit 61 located at the buffer station back to the storage station for temporary storage, and removes the empty storage unit 61 from the storage station again and places it on the first bracket 91 located at the buffer station, and repeats this process.

[0175] like Figure 21As shown, the feeding subsystem may also be provided with a feeding buffer station, which is equipped with a feeding station and a buffer station. The feeding buffer station includes a second bracket 91' and a second guide rail 92'. The second bracket 91' is used to accommodate the storage unit 61. The second bracket 91' and the storage unit 61 thereon are switched between the feeding station and the buffer station along the second guide rail 92'. The handling robot 64 removes a fully loaded storage unit 61 selected by the control subsystem from the storage station and places it on the second bracket 91' located at the buffer station. The storage unit 61 located at the feeding station moves along the second guide rail 92' so that the channel outlet aligns with the feeding channel 83 to unload the bearing rollers. When the bearing rollers in the storage unit 61 located at the feeding station are emptied, the empty storage unit 61 switches to the buffer station, and the fully loaded storage unit 61 switches to the feeding station. The handling robot 64 returns the empty storage unit 61 at the buffer station to the storage station, and removes the fully loaded storage unit 61 selected by the control subsystem from the storage station and places it on the second bracket 91' at the buffer station, and repeats this process.

[0176] Example 3: An external circulation system for cyclic grinding of the rolling surface of bearing rollers

[0177] The main differences between the external circulation system described in Example 1 are:

[0178] The external circulation system 5 is suitable for use in a bearing roller rolling surface grinding apparatus equipped with a sleeve-type grinding tool kit. The grinding tool kit comprises a horizontally arranged grinding shaft and a grinding sleeve 33. The outer circumferential surface of the grinding shaft is provided with a set of at least three grinding shaft grooves arranged in a circumferential array. The inner wall of the grinding sleeve 33 is provided with a cylindrical spiral groove 23. The inlet 41 of the grinding zone is located at one end of the cylindrical spiral groove 23 and opens into the upper half of the outer wall of the grinding sleeve 33. The outlet 42 of the grinding zone is located at the other end of the cylindrical spiral groove 23. During grinding, the bearing rollers continuously enter the grinding zone through the inlet 41 and continuously exit the grinding zone through the outlet 42. The entry and exit of the bearing rollers from the inlet 41 and outlet 42 occur synchronously with the grinding process. The bearing rollers are cylindrical rollers 11, tapered rollers 12, or spherical rollers 13. Figure 22 The figure shows the entrance and exit of the grinding processing area when the outer surface of the grinding shaft of the grinding tool kit is provided with a group of linear grooves distributed in a circumferential array and the inner wall of the grinding sleeve is provided with cylindrical spiral grooves.

[0179] The material receiving subsystem includes a material receiving channel 73 and a pre-station material receiving unit 78 and a pre-station transition unit 79 as described in Example 1.

[0180] The outlet 42 of the grinding processing area is connected to the material storage channel 63 of the pre-station material receiving unit 78 through the material receiving channel 73, or is connected to the material storage channel 63 of the pre-station material receiving unit 78 through the material receiving channel 73 and the conveying mechanism. During grinding, the bearing rollers leave the outlet 42 and pass through the material receiving channel 73 to enter the material storage channel 63 of the pre-station material receiving unit 78, or pass through the material receiving channel 73 and the conveying mechanism in sequence to enter the material storage channel 63 of the pre-station material receiving unit 78. Figure 23 and Figure 24 The connection between the receiving channel 73 and the conveyor belt 74 is shown, wherein: Figure 23 The figure shows that the spherical roller 13 passes through the material receiving channel 73 and enters the conveyor belt 74. Figure 24 It is shown that the cylindrical roller 11 passes through the material receiving channel 73 and enters the conveyor belt 74.

[0181] The feed channel 83 is disposed in the upper space of the outer wall of the grinding sleeve 33 and is connected to the inlet 41. Figure 25 shown.

[0182] Example 4: An external circulation system for cyclic grinding of the rolling surface of bearing rollers

[0183] The main differences between the external circulation system described in Example 2 are:

[0184] The external circulation system 5 is suitable for use in a bearing roller rolling surface grinding apparatus equipped with a sleeve-type grinding tool kit. The grinding tool kit comprises a horizontally arranged grinding shaft and a grinding sleeve 33. The outer circumferential surface of the grinding shaft is provided with a set of at least three grinding shaft grooves arranged in a circumferential array. The inner wall of the grinding sleeve 33 is provided with a cylindrical spiral groove 23. The inlet 41 of the grinding zone is located at one end of the cylindrical spiral groove 23 and opens into the upper half of the outer wall of the grinding sleeve 33. The outlet 42 of the grinding zone is located at the other end of the cylindrical spiral groove 23. During grinding, the bearing rollers continuously enter the grinding zone through the inlet 41 and continuously exit the grinding zone through the outlet 42. The entry and exit of the bearing rollers from the inlet 41 and outlet 42 occur synchronously with the grinding process. The bearing rollers are cylindrical rollers 11, tapered rollers 12, or spherical rollers 13. Figure 22 The figure shows the entrance and exit of the grinding processing area when the outer surface of the grinding shaft of the grinding tool kit is provided with a group of linear grooves distributed in a circumferential array and the inner wall of the grinding sleeve is provided with cylindrical spiral grooves.

[0185] The material receiving subsystem is provided with a material receiving channel 73 as described in Example 3.

[0186] The outlet 42 of the grinding processing area is connected to the material storage channel 63 of the material storage unit 61 through the material receiving channel 73, or is connected to the material storage channel 63 of the material storage unit 61 through the material receiving channel 73 and the conveying mechanism. During grinding, the bearing roller leaves the outlet 42 and enters the material storage channel 63 of the material storage unit 61 through the material receiving channel 73, or enters the material storage channel 63 of the material storage unit 61 through the material receiving channel 73 and the conveying mechanism in sequence. Figure 23 The spherical roller 13 passes through the material receiving channel 73 and enters the conveyor belt 74. Figure 24 It is shown that the cylindrical roller 11 passes through the material receiving channel 73 and enters the conveyor belt 74.

[0187] The handling robot 64 removes an empty storage unit 61 from the storage station and connects the channel entrance of the storage unit 61 to the receiving channel 73 or the conveying mechanism to receive the tapered rollers 1 from the receiving channel 73. When the storage unit 61 is fully loaded with tapered rollers 1, the handling robot 64 returns the storage unit 61 to the storage station for temporary storage.

[0188] The feed channel 83 is disposed in the upper space of the outer wall of the grinding sleeve 33 and communicates with the inlet 41 .

[0189] Example 5: An external circulation system for cyclic grinding of the rolling surface of bearing rollers

[0190] The main differences between the external circulation system described in Example 3 are:

[0191] The external circulation system 5 is suitable for a bearing roller rolling surface circulation grinding device equipped with a sleeve type grinding tool kit, such as Figure 8As shown, the grinding tool kit includes a horizontally arranged grinding shaft and a grinding sleeve 33. The outer circumferential surface of the grinding shaft is provided with a set of no less than three linear grooves 21 distributed in a circumferential array. The inner wall of the grinding sleeve 33 is provided with a set of multiple coaxial annular grooves 24 of equal diameter. Corresponding to each annular groove 24, an entrance 41 is provided for the bearing rollers to enter the grinding process area and leads to the upper outer wall of the grinding sleeve 33. The entrance 41 also serves as the exit 42 for the bearing rollers to exit the grinding process area. When the circulating grinding equipment is in operation, the bearing rollers are first loaded into the grinding process area through the entrance 41. After the grinding process area is fully loaded with the bearing rollers, the grinding process begins. After a period of processing, the bearing rollers in the grinding process area are discharged from the exit 42, and the subsequent bearing rollers are loaded into the grinding process area through the entrance 41 to continue the grinding process. The bearing rollers enter the grinding zone from the inlet 41 or exit the grinding zone from the outlet 42 in a time-sharing manner with the grinding process, and the grinding process is suspended during the period when the bearing rollers enter or exit the grinding zone. The bearing rollers are cylindrical rollers 11, tapered rollers 12, or spherical rollers 13.

[0192] The material receiving subsystem includes a unloading robot and a pre-station material receiving unit 78 and a pre-station transition unit 79 as described in Example 1.

[0193] The feeding subsystem includes a loading robot and the post-station transition unit 81 and the post-station feeding unit 82 as described in Example 1.

[0194] The loading robot and the unloading robot are both provided with a set of parallel arranged finger-shaped grippers 93, and the ends of the finger-shaped grippers 93 are provided with suction cups 94 to absorb the bearing rollers. Figure 26 As shown, the suction cup 94 is a vacuum suction cup or an electromagnetic suction cup.

[0195] Each time the bearing roller in the grinding area completes a round of grinding, unloading and loading are performed. The grinding shaft is rotated until a linear groove 21 faces the outlet 42, and the finger-shaped gripper 93 of the unloading robot is inserted into each outlet 42, and a bearing roller located in the linear groove 21 is sucked and taken out from each outlet 42 in parallel, and then the bearing roller is placed in each storage channel 63 of the front-end receiving unit 78 or in a conveying mechanism (such as Figure 26As shown, the unloading robot is placing the tapered roller 12 taken out from the outlet 42 onto the conveyor belt 74), and the bearing rollers placed on the conveying mechanism pass through the conveying mechanism into the various storage channels 63 of the station front receiving unit 78. The finger-shaped gripper 93 of the loading robot absorbs and takes out a bearing roller from each storage channel 63 of the station rear feeding unit in parallel, and then places the bearing roller into the linear groove 21 through each entrance 41 according to the posture requirements of the grinding processing area for the bearing roller, and the finger-shaped gripper 93 withdraws from the entrance 41. Continue to rotate the grinding shaft until the next linear groove 21 is opposite the outlet 42, and repeat the above operations until all the bearing rollers that have completed the previous round of grinding are unloaded from the grinding processing area and loaded into the subsequent bearing rollers, and the grinding process continues. As shown Figure 27 As shown, the third storage channel 3 of the front-end receiving unit 78 is receiving tapered rollers 12 from the conveyor mechanism. The loading robot has already removed two tapered rollers 12 from each storage channel 63 of the rear-end feeding unit 82. The conveyor mechanism is not shown. During each grinding cycle, the average material removal along the diameter of the bearing roller must be controlled within 0.5 microns.

[0196] Example 6: An external circulation system for cyclic grinding of the rolling surface of bearing rollers

[0197] The external circulation system 5 is suitable for a bearing roller rolling surface circulation grinding device equipped with a grinding disc kit, wherein the grinding disc kit includes a lower grinding disc 31 and an upper grinding disc 32, and the front of the lower grinding disc 31 is provided with a group of no less than 3 straight grooves 21 distributed radially in a plane or radially distributed on a conical surface, or radially distributed inward concave arc grooves, and the front of the upper grinding disc 32 is correspondingly provided with a plane spiral groove or a conical surface spiral groove or an outward convex circular arc rotating surface spiral groove, and the entrance 41 of the grinding processing area is provided at the inner edge end of the plane spiral groove or the conical surface spiral groove or the outward convex circular arc rotating surface spiral groove adjacent to the upper grinding disc 32 and leads to the back side of the upper grinding disc 32, and the outlet 42 of the grinding processing area is at the outer edge end of the corresponding plane spiral groove or the conical surface spiral groove or the outward convex circular arc rotating surface spiral groove adjacent to the upper grinding disc 32. During the grinding process, the bearing rollers continuously enter the grinding zone from the inlet 41 and continuously exit the grinding zone from the outlet 42. The bearing rollers enter the grinding zone from the inlet 41 and exit the grinding zone from the outlet 42 synchronously with the grinding process. The bearing rollers are cylindrical rollers 11 or tapered rollers 12. Figure 13The figure shows the entrance and exit of the grinding processing area when the front surface of the lower grinding disc 31 of the grinding disc set is provided with linear grooves 21 distributed in a plane radial pattern and the front surface of the upper grinding disc 32 is provided with planar spiral grooves 22.

[0198] The external circulation system 5 includes a material receiving mechanism, a lifting mechanism and a material feeding channel 83 .

[0199] The feeding channel 83 is provided in the upper space of the back side of the upper grinding disc 32 and is connected to the inlet 41. Figure 17 shown.

[0200] The material receiving mechanism includes a U-shaped guide frame 71, a support base 72, and a material receiving transition channel 75. The U-shaped guide frame 71 is fixedly connected to the lower grinding disc 31, with the U-shaped opening facing the linear groove 21 or the inwardly concave arc groove. The inner width of the U-shaped guide frame 71 matches the diameter of the bearing roller. The U-shaped guide frame 71 is located outside the lower grinding disc 31, replacing the linear groove 21 or the inwardly concave arc groove to constrain and guide the bearing roller. The support base 72 is fixedly connected to the bed of the circulating grinding machine, arranged around the outer edge of the lower grinding disc 31, and disposed below the U-shaped guide frame 71. The support base 72 supports the bearing roller outside the lower grinding disc 31, replacing the linear groove 21 or the inwardly concave arc groove. Under the restraint and guidance of the U-shaped guide frame 71 and the support of the support base 72, the bearing roller maintains its original position in the grinding process area during its exit from the exit 42. The material receiving transition channel 75 includes an arc channel 76, which is arranged around the outer edge of the lower grinding disc 31 and docked with the support base plate 72. The arc channel 76 gradually sinks from the docking point with the support base plate 72 to the end point of the arc channel 76 to ensure that the U-shaped guide frame 71 does not interfere with the bearing rollers that are gradually disengaging from the restraint and guidance of the U-shaped guide frame 71 when passing over the end point of the arc channel 76. The width of the material receiving transition channel 75 matches the axial length of the bearing rollers to constrain the posture of the bearing rollers when rolling along the material receiving transition channel 75 to avoid being stuck. The material receiving transition channel 75 docks with the lifting mechanism or docks with the lifting mechanism through a conveying mechanism. The bearing rollers enter the lifting mechanism through the material receiving transition channel 75, or enter the lifting mechanism through the material receiving transition channel 75 and the conveying mechanism in sequence. Figure 16 The figure is a schematic diagram of the material receiving mechanism, in which the front surface of the lower grinding disc is provided with linear grooves 21 distributed in a plane radial pattern. The figure also shows the docking relationship between the material receiving transition channel 75 and the conveyor belt 74, and the bearing roller enters the conveyor belt 74 through the material receiving transition channel 75.

[0201] The lifting mechanism is used to lift the bearing roller upward in a single isolated, single-line queue, and posture-controlled manner to dock with the feed channel 83 or dock with the feed channel 83 through a conveying mechanism. The bearing roller enters the feed channel 83 through the lifting mechanism or enters the feed channel 83 through the lifting mechanism and the conveying mechanism in sequence.

[0202] The feeding channel 83 is a curved channel, a broken line channel or a zigzag channel. Figure 17 As shown, as the bearing rollers from the lifting mechanism or the conveying mechanism enter the inlet 41 through the feed channel 83, they roll downward in a single-line formation, along a curved path, a broken line path, or a combination of curved and zigzag paths, under their own weight, with their axes parallel to each other and their rolling surfaces 15 in close proximity to each other. The width of the feed channel 83 matches the axial length of the bearing rollers to constrain the rollers' rolling posture within the feed channel 83 and prevent them from becoming stuck. The length of the feed channel 83 is sufficient to accommodate dozens or more bearing rollers.

[0203] A grinding cycle is the process in which all bearing rollers enter the grinding zone from the inlet 41, undergo grinding in the grinding zone, and exit the grinding zone from the outlet 42. As the number of grinding cycles increases, the selective material removal effect between the bearing rollers in the grinding zone gradually expands to the entire batch of bearing rollers, continuously improving the dimensional consistency of the bearing rollers until the specified technical specifications are met.

[0204] Example 7: An external circulation system for cyclic grinding of the rolling surface of bearing rollers

[0205] The main differences between the external circulation system described in Example 6 are:

[0206] The external circulation system 5 is suitable for use in a bearing roller rolling surface grinding apparatus equipped with a sleeve-type grinding tool kit. The grinding tool kit comprises a horizontally arranged grinding shaft and a grinding sleeve 33. The outer circumferential surface of the grinding shaft is provided with a set of at least three grinding shaft grooves arranged in a circumferential array. The inner wall of the grinding sleeve 33 is provided with a cylindrical spiral groove 23. The inlet 41 of the grinding zone is located at one end of the cylindrical spiral groove 23 and opens into the upper half of the outer wall of the grinding sleeve 33. The outlet 42 of the grinding zone is located at the other end of the cylindrical spiral groove 23. During grinding, the bearing rollers continuously enter the grinding zone through the inlet 41 and continuously exit the grinding zone through the outlet 42. The entry and exit of the bearing rollers from the inlet 41 and outlet 42 occur synchronously with the grinding process. The bearing rollers are cylindrical rollers 11, tapered rollers 12, or spherical rollers 13. Figure 22 The figure shows the entrance and exit of the grinding processing area when the outer surface of the grinding shaft of the grinding tool kit is provided with a group of linear grooves distributed in a circumferential array and the inner wall of the grinding sleeve is provided with cylindrical spiral grooves.

[0207] The material receiving mechanism is provided with a material receiving channel 73 .

[0208] The outlet 42 of the grinding area is connected to the lifting mechanism through the material receiving channel 73, or is connected to the lifting mechanism through the material receiving channel 73 and the conveying mechanism. During grinding, the bearing roller leaves the outlet 42 and enters the lifting mechanism through the material receiving channel 73, or enters the lifting mechanism through the material receiving channel 73 and the conveying mechanism in sequence. Figure 23 and Figure 24 The connection between the receiving channel 73 and the conveyor belt 74 is shown, wherein: Figure 23 The figure shows that the spherical roller 13 passes through the material receiving channel 73 and enters the conveyor belt 74. Figure 24 It is shown that the cylindrical roller 11 passes through the material receiving channel 73 and enters the conveyor belt 74.

[0209] The feed channel 83 is disposed in the upper space of the outer wall of the grinding sleeve 33 and is connected to the inlet 41. Figure 25 shown.

Claims

1. An external circulation system for cyclic grinding of the rolling surface of a bearing roller, wherein the bearing roller refers to a bearing roller to be processed, and the bearing roller is a cylindrical roller (11) or a tapered roller (12) or a spherical roller (13), wherein the cylindrical roller (11) includes an arc-convex cylindrical roller and a needle roller, the tapered roller (12) includes an arc-convex tapered roller, and the spherical roller (13) includes a symmetrical spherical roller without a spherical base surface, a symmetrical spherical roller with a spherical base surface, and an asymmetrical spherical roller; a grinding processing area is defined as an area where the bearing roller undergoes grinding; during grinding, the bearing roller enters the grinding processing area from an entrance (41) of the grinding processing area and leaves the grinding processing area from an exit (42) of the grinding processing area; It is characterized in that The external circulation system includes a material receiving subsystem, a material feeding subsystem, a material storage station, a plurality of material storage units (61) and a control subsystem; The storage station is used to store the storage unit (61); the storage unit (61) is used to temporarily store bearing rollers, the storage unit (61) includes one or more storage channels (63), the bearing rollers are sequentially stored in the storage channels (63) of the storage unit (61) in a single-line queue, with axes parallel to each other and rolling surfaces (15) close to the rolling surfaces (15); the storage channels (63) extend from the channel entrance to the channel exit from top to bottom; the storage unit (61) is a hardware basis for adjusting the order and position of the bearing rollers in the bearing roller queue in blocks under the condition that there is no physical contact between the bearing rollers loaded in different storage units (61), and the bearing roller queue is a closed-loop queue including all bearing rollers in the grinding processing area and the external circulation system (5); The material receiving subsystem is used to sequentially load the bearing rollers leaving the outlet (42) of the grinding processing area into the empty material storage unit (61) in a queue-moving and posture-controlled manner; The feeding subsystem is used to unload the bearing rollers from the storage unit (61) selected in the storage station according to the decision of the control subsystem, and load them into the entrance (41) of the grinding processing area in an orderly manner in a queue and posture-controlled manner according to the posture requirements of the grinding processing area for the bearing rollers; The bearing rollers in the same storage channel (63) enter the storage channel (63) from the channel entrance and leave the storage channel (63) from the channel exit in a first-in-first-out and last-in-last-out order; The control subsystem is used to decide when to unload the bearing rollers from which storage unit (61); the control subsystem is the software basis for adjusting the order and position of the bearing rollers in the bearing roller queue in blocks without physical contact between the bearing rollers loaded in different storage units (61); During the grinding process, the bearing rollers that have completed one grinding process in the grinding process area leave the grinding process area from the outlet (42), and the bearing rollers that have left the grinding process area are temporarily stored in an unloaded storage unit (61) and stored in the storage station. According to the decision of the control subsystem, the bearing rollers are unloaded from the storage unit (61) selected in the storage station and sent to the grinding process area from the entrance (41) to continue to receive the grinding process. The order and position of the bearing rollers sent to the grinding process area in the bearing roller queue are updated according to the decision of the control subsystem, thereby realizing the mixed replacement of the bearing rollers in blocks without physical contact between the bearing rollers loaded in different storage units (61); The process in which all the bearing rollers complete one time of entering the grinding processing area from the inlet (41), undergoing grinding in the grinding processing area, and leaving the grinding processing area from the outlet (42) is called one grinding cycle; The changes in the order and position of the bearing rollers in the outer circulation system (5) that exit the grinding zone from the outlet (42) change the combination of the bearing rollers when they subsequently enter the grinding zone, thereby extending the selective material removal effect between the bearing rollers in the grinding zone to the entire batch of bearing rollers; with the increase in grinding cycles, the dimensional consistency of the bearing rollers continues to improve until it reaches the specified technical indicators; The external circulation system (5) is used, on the one hand, to cope with the grinding of large quantities of bearing rollers that exceed the capacity of the grinding processing area; on the other hand, it is used to establish a logistics channel for the bearing rollers between the outlet (42) and the inlet (41); and on the other hand, it is used to mix and replace the bearing rollers.

2. The external circulation system for cyclic grinding of rolling surfaces of bearing rollers according to claim 1, characterized in that: The external circulation system is suitable for a bearing roller rolling surface circulation grinding device equipped with a grinding disc set, wherein the grinding disc set includes a lower grinding disc (31) and an upper grinding disc (32), wherein the front of the lower grinding disc (31) is provided with a group of no less than 3 straight grooves (21) distributed in a plane radial shape or a conical surface radial shape or radially distributed inward concave arc grooves, and the front of the upper grinding disc (32) is correspondingly provided with a plane spiral groove or a conical surface spiral groove or an outward convex arc rotary surface spiral groove, and the entrance (41) of the grinding processing area is provided at the plane spiral groove or the conical surface spiral groove or the outward convex arc rotary surface spiral groove adjacent to the upper grinding disc (32). ) and leads to the back side of the upper grinding disc (32), and the outlet (42) of the grinding processing area is adjacent to the outer edge of the upper grinding disc (32) at the corresponding plane spiral groove or conical spiral groove or convex arc rotary surface spiral groove; during grinding processing, the bearing rollers continuously enter the grinding processing area from the inlet (41) and continuously leave the grinding processing area from the outlet (42); the bearing rollers enter the grinding processing area from the inlet (41) and leave the grinding processing area from the outlet (42) synchronously with the grinding process; the bearing rollers are cylindrical rollers (11) or tapered rollers (12); The storage space of the storage unit (61) is divided into a plurality of storage channels (63) parallel to each other, and the storage channels (63) are arranged at an angle relative to a horizontal plane so as to facilitate the bearing rollers to roll unpowered in the storage channels (63) under the action of their own gravity; the width of the storage channels (63) matches the axial length of the bearing rollers; the upper end of the storage channels (63) is the channel entrance, and the lower end of the storage channels (63) is the channel exit and is provided with an exit gate (62); the bearing rollers are sequentially stored in the storage channels (63) in a single-line queue, with their axes parallel to each other and their rolling surfaces (15) close to the rolling surfaces (15); when the bearing rollers are unloaded from the storage channels (63), the exit gate (62) is in an open state; The material storage units (61) are installed in layers in the material storage station; The material receiving subsystem includes a material receiving mechanism, a front-station material receiving unit (78) and a front-station transition unit (79); The front-station receiving unit (78) and the front-station transition unit (79) are both provided with a material storage channel (63) consistent with that in the material storage unit (61); The material receiving mechanism comprises a U-shaped guide frame (71), a supporting bottom plate (72) and a material receiving transition channel (75); The U-shaped guide frame (71) is fixedly connected to the lower grinding disc (31), and the U-shaped opening is opposite to the linear groove (21) or the inwardly concave arc groove. The inner width of the U-shaped guide frame (71) matches the diameter of the bearing roller; the supporting base plate (72) is fixedly connected to the bed of the circulating grinding equipment, arranged around the outer edge of the lower grinding disc (31), and disposed under the U-shaped guide frame (71); under the restraint guidance of the U-shaped guide frame (71) and the support of the supporting base plate (72), the bearing roller maintains its posture in the grinding processing area during the process of leaving the grinding processing area from the outlet (42); the material receiving transition channel (75) includes a circular arc channel (76), which is arranged around the outer edge of the lower grinding disc (31) and docked with the supporting base plate (72). ), the arc channel (76) gradually sinks from the docking point with the supporting base plate (72) to the end point of the arc channel (76) to ensure that the U-shaped guide frame (71) does not interfere with the bearing roller that gradually escapes from the constraint guidance of the U-shaped guide frame (71) when passing over the end point of the arc channel (76), and the width of the material receiving transition channel (75) matches the axial length of the bearing roller; the material receiving transition channel (75) docks with the material storage channel (63) of the front-station material receiving unit (78) or docks with the material storage channel (63) of the front-station material receiving unit (78) through the conveying mechanism, and the bearing roller passes through the material receiving transition channel (75) or sequentially passes through the material receiving transition channel (75) and the conveying mechanism to enter the material storage channel (63) of the front-station material receiving unit (78); When the station-front receiving unit (78) is fully loaded with the bearing rollers, the channel entrance of the station-front transition unit (79) docks with the channel exit of the station-front receiving unit (78), and all the bearing rollers in the station-front receiving unit (78) are transferred to the storage channel (63) of the station-front transition unit (79) in a rolling manner; the channel exit of the fully loaded station-front transition unit (79) docks with the channel entrance of the empty storage unit (61) in the storage station, and all the bearing rollers in the station-front transition unit (79) are loaded into the storage channel (63) of the storage unit (61) in a rolling manner; The feeding subsystem includes a post-station transition unit (81), a post-station feeding unit (82) and a feeding channel (83); The post-station transition unit (81) and the post-station feeding unit (82) are both provided with a storage channel (63) that is consistent with the storage unit (61); the feeding channel (83) is provided in the upper space on the back side of the upper grinding disc (32) and is communicated with the inlet (41); According to the decision of the control subsystem, the channel entrance of the post-station transition unit (81) is docked with the channel exit of the selected storage unit (61) in the storage station, and all the bearing rollers in the storage unit (61) are unloaded to the storage channel (63) of the post-station transition unit (81) in a rolling manner, and the storage channel (63) of the storage unit (61) is emptied; the channel exit of the fully loaded post-station transition unit (81) is docked with the channel entrance of the post-station feeding unit (82), and all the bearing rollers in the post-station transition unit (81) are transferred to the storage channel (63) of the post-station feeding unit (82) in a rolling manner; the channel exits of multiple storage channels of the post-station feeding unit (82) are docked with the feeding channel (83) one by one or docked with the feeding channel (83) one by one through the feeding transition channel (84) to send the bearing rollers into the entrance (41) through the feeding channel (83); The feeding channel (83) is a curved channel, a broken line channel or a zigzag combined channel; in the process of entering the inlet (41) through the feeding channel (83), the bearing rollers from the post-station feeding unit (82) roll in the feeding channel (83) from top to bottom in a single-line queue, with the axes parallel to each other and the rolling surfaces (15) close to the rolling surface (15) in the manner of a curved path, a broken line path or a zigzag combined path by the weight of the bearing rollers; the width of the feeding channel (83) matches the axial length of the bearing rollers.

3. The external circulation system for cyclic grinding of rolling surfaces of bearing rollers according to claim 1, characterized in that: The invention relates to a bearing roller rolling surface circulation grinding device installed with a grinding disc set, wherein the grinding disc set comprises a lower grinding disc (31) and an upper grinding disc (32), wherein the front surface of the lower grinding disc (31) is provided with a group of not less than 3 straight grooves (21) distributed radially on a plane or radially distributed on a conical surface, or radially distributed inward concave arc grooves, and the front surface of the upper grinding disc (32) is correspondingly provided with a plane spiral groove or a conical spiral groove or an outward convex circular arc rotating surface spiral groove, and the entrance (41) of the grinding processing area is provided at the inner side of the plane spiral groove or the conical spiral groove or the outward convex circular arc rotating surface spiral groove adjacent to the upper grinding disc (32). Along one end and leading to the back side of the upper grinding disc (32), the outlet (42) of the grinding processing area is located at the corresponding plane spiral groove or conical spiral groove or convex arc rotary surface spiral groove adjacent to one end of the outer edge of the upper grinding disc (32); during grinding, the bearing rollers continuously enter the grinding processing area from the inlet (41) and continuously leave the grinding processing area from the outlet (42); the bearing rollers enter the grinding processing area from the inlet (41) and leave the grinding processing area from the outlet (42) synchronously with the grinding process; the bearing rollers are cylindrical rollers (11) or tapered rollers (12); The storage space of the storage unit (61) is one or more vertical storage channels (63) arranged in parallel, and the storage channels (63) are curved channels, broken-line channels, or zigzag channels. During the process of storing in the storage unit (61) or unloading from the storage unit (61), the bearing rollers roll along a curved path, a broken line path or a zigzag combined path from top to bottom in the storage channel (63) by virtue of their own weight, with their axes being parallel to each other and their rolling surfaces (15) close to the rolling surface (15); the width of the storage channel (63) matches the axial length of the bearing rollers; the upper end of the storage channel (63) is the channel entrance, and the lower end of the storage channel (63) is the channel exit and is provided with an exit gate (62); the bearing rollers are sequentially stored in the storage channel (63) from bottom to top in a single-line queue, with their axes being parallel to each other and their rolling surfaces (15) close to the rolling surface (15); the exit gate (62) is in an open state when the bearing rollers are unloaded from the storage channel (63); The storage station is provided with a transport robot (64) for moving the storage unit (61); The material receiving subsystem is provided with a material receiving mechanism; The material receiving mechanism comprises a U-shaped guide frame (71), a supporting bottom plate (72) and a material receiving transition channel (75); The U-shaped guide frame (71) is fixedly connected to the lower grinding disc (31), and the U-shaped opening is opposite to the linear groove (21) or the concave arc groove. The inner width of the U-shaped guide frame (71) matches the diameter of the bearing roller; the supporting base plate (72) is fixedly connected to the bed of the circulating grinding equipment, arranged around the outer edge of the lower grinding disc (31), and disposed under the U-shaped guide frame (71); under the constraint guidance of the U-shaped guide frame (71) and the support of the supporting base plate (72), the bearing roller maintains its posture in the grinding processing area during the process of leaving the grinding processing area from the outlet (42); the material receiving transition channel (75) includes a circular arc channel (76), which is arranged around the outer edge of the lower grinding disc (31) and docked with the supporting base plate (72), the arc channel (76) gradually sinks from the docking point with the supporting base plate (72) to the end point of the arc channel (76) to ensure that the U-shaped guide frame (71) does not interfere with the bearing roller that gradually escapes from the constraint and guidance of the U-shaped guide frame (71) when passing over the end point of the arc channel (76), and the width of the material connection transition channel (75) matches the axial length of the bearing roller; the material connection transition channel (75) docks with the material storage channel (63) of the material storage unit (61) or docks with the material storage channel (63) of the material storage unit (61) through the conveying mechanism, and the bearing roller passes through the material connection transition channel (75) or sequentially passes through the material connection transition channel (75) and the conveying mechanism to enter the material storage channel (63) of the material storage unit (61); The feeding subsystem is provided with a feeding channel (83); the feeding channel (83) is provided in the upper space on the back side of the upper grinding disc (32) and is communicated with the inlet (41); The operation of the handling robot (64) includes: removing an empty storage unit (61) from the storage station, and docking the channel entrance of the storage unit (61) with the material receiving transition channel (75) or the conveying mechanism to receive the bearing rollers from the material receiving mechanism; when the storage unit (61) is fully loaded with the bearing rollers, the handling robot (64) returns the storage unit (61) to the storage station for temporary storage; according to the decision of the control subsystem, the handling robot (64) moves the selected storage unit (61) in the storage station, and docks the channel outlet of the storage unit (61) with the feeding channel (83) to unload the bearing rollers; The feeding channel (83) is a curved channel, a broken line channel or a zigzag combined channel; in the process of entering the inlet (41) through the feeding channel (83), the bearing rollers from the storage unit (61) roll in the feeding channel (83) from top to bottom in a single-line queue, with the axes parallel to each other and the rolling surfaces (15) close to the rolling surface (15) along the curved path, broken line path or zigzag combined path by virtue of the deadweight of the bearing rollers; the width of the feeding channel (83) matches the axial length of the bearing rollers.

4. The external circulation system for cyclic grinding of rolling surfaces of bearing rollers according to claim 1, characterized in that: The invention relates to a bearing roller rolling surface circulation grinding device suitable for being installed with a sleeve-type grinding tool kit, wherein the grinding tool kit comprises a grinding shaft and a grinding sleeve (33) arranged horizontally, wherein the outer peripheral surface of the grinding shaft is provided with a group of grinding shaft grooves distributed in a circumferential array of not less than three, and the inner wall of the grinding sleeve (33) is provided with a cylindrical spiral groove (23), the inlet (41) of the grinding processing area is provided at one end of the cylindrical spiral groove (23) and leads to the upper outer wall of the grinding sleeve (33), and the outlet (42) of the grinding processing area is provided at the other end of the cylindrical spiral groove (23); during grinding processing, the bearing roller continuously enters the grinding processing area from the inlet (41) and continuously leaves the grinding processing area from the outlet (42); the bearing roller enters the grinding processing area from the inlet (41) and leaves the grinding processing area from the outlet (42) synchronously with the grinding process; The storage space of the storage unit (61) is divided into a plurality of storage channels (63) parallel to each other, and the storage channels (63) are arranged at an angle relative to a horizontal plane so as to facilitate the bearing rollers to roll unpowered in the storage channels (63) under the action of their own gravity; the width of the storage channels (63) matches the axial length of the bearing rollers; the upper end of the storage channels (63) is the channel entrance, and the lower end of the storage channels (63) is the channel exit and is provided with an exit gate (62); the bearing rollers are sequentially stored in the storage channels (63) in a single-line queue, with their axes parallel to each other and their rolling surfaces (15) close to the rolling surfaces (15); when the bearing rollers are unloaded from the storage channels (63), the exit gate (62) is in an open state; The material storage units (61) are installed in layers in the material storage station; The material receiving subsystem includes a material receiving channel (73), a pre-station material receiving unit (78) and a pre-station transition unit (79); The front-station receiving unit (78) and the front-station transition unit (79) are both provided with a material storage channel (63) consistent with that in the material storage unit (61); The outlet (42) of the grinding processing area is connected to the material storage channel (63) of the pre-station material receiving unit (78) through the material receiving channel (73), or is connected to the material storage channel (63) of the pre-station material receiving unit (78) through the material receiving channel (73) and the conveying mechanism; during grinding processing, the bearing roller leaves the outlet (42) and passes through the material receiving channel (73) or passes through the material receiving channel (73) and the conveying mechanism in sequence to enter the material storage channel (63) of the pre-station material receiving unit (78); When the station-front receiving unit (78) is fully loaded with the bearing rollers, the channel entrance of the station-front transition unit (79) docks with the channel exit of the station-front receiving unit (78), and all the bearing rollers in the station-front receiving unit (78) are transferred to the storage channel (63) of the station-front transition unit (79) in a rolling manner; the channel exit of the fully loaded station-front transition unit (79) docks with the channel entrance of the empty storage unit (61) in the storage station, and all the bearing rollers in the station-front transition unit (79) are loaded into the storage channel (63) of the storage unit (61) in a rolling manner; The feeding subsystem includes a post-station transition unit (81), a post-station feeding unit (82) and a feeding channel (83); The post-station transition unit (81) and the post-station feeding unit (82) are both provided with a storage channel (63) that is consistent with the storage unit (61); the feeding channel (83) is provided in the upper space of the outer wall of the grinding sleeve (33) and is communicated with the inlet (41); According to the decision of the control subsystem, the channel entrance of the post-station transition unit (81) is connected to the channel exit of the selected storage unit (61) in the storage station, and all the bearing rollers in the storage unit (61) are unloaded to the storage channel (63) of the post-station transition unit (81) in a rolling manner; the channel exit of the fully loaded post-station transition unit (81) is connected to the channel entrance of the post-station feeding unit (82), and all the bearing rollers in the post-station transition unit (81) are transferred to the storage channel (63) of the post-station feeding unit (82) in a rolling manner; the channel exits of multiple storage channels of the post-station feeding unit (82) are connected to the feeding channel (83) one by one or are connected to the feeding channel (83) one by one through the feeding transition channel (84) to send the bearing rollers into the entrance (41) through the feeding channel (83); The feeding channel (83) is a curved channel, a broken line channel or a zigzag combined channel; in the process of entering the inlet (41) through the feeding channel (83), the bearing rollers from the post-station feeding unit (82) roll in the feeding channel (83) from top to bottom in a single-line queue, with the axes parallel to each other and the rolling surfaces (15) close to the rolling surface (15) in the manner of a curved path, a broken line path or a zigzag combined path by the weight of the bearing rollers; the width of the feeding channel (83) matches the axial length of the bearing rollers.

5. The external circulation system for cyclic grinding of rolling surfaces of bearing rollers according to claim 1, characterized in that: The invention relates to a bearing roller rolling surface circulation grinding device suitable for being installed with a sleeve-type grinding tool kit, wherein the grinding tool kit comprises a grinding shaft and a grinding sleeve (33) arranged horizontally, wherein the outer peripheral surface of the grinding shaft is provided with a group of grinding shaft grooves distributed in a circumferential array of not less than three, and the inner wall of the grinding sleeve (33) is provided with a cylindrical spiral groove (23), the inlet (41) of the grinding processing area is provided at one end of the cylindrical spiral groove (23) and leads to the upper outer wall of the grinding sleeve (33), and the outlet (42) of the grinding processing area is provided at the other end of the cylindrical spiral groove (23); during grinding processing, the bearing roller continuously enters the grinding processing area from the inlet (41) and continuously leaves the grinding processing area from the outlet (42); the bearing roller enters the grinding processing area from the inlet (41) and leaves the grinding processing area from the outlet (42) synchronously with the grinding process; The storage space of the storage unit (61) is one or more vertical storage channels (63) arranged in parallel, and the storage channels (63) are curved channels, broken-line channels, or zigzag channels. During the process of storing in the storage unit (61) or unloading from the storage unit (61), the bearing rollers roll along a curved path, a broken line path or a zigzag combined path from top to bottom in the storage channel (63) by virtue of their own weight, with their axes being parallel to each other and their rolling surfaces (15) close to the rolling surface (15); the width of the storage channel (63) matches the axial length of the bearing rollers; the upper end of the storage channel (63) is the channel entrance, and the lower end of the storage channel (63) is the channel exit and is provided with an exit gate (62); the bearing rollers are sequentially stored in the storage channel (63) from bottom to top in a single-line queue, with their axes being parallel to each other and their rolling surfaces (15) close to the rolling surface (15); the exit gate (62) is in an open state when the bearing rollers are unloaded from the storage channel (63); The storage station is provided with a handling robot (64) for moving the storage unit (61); The material receiving subsystem is provided with a material receiving channel (73); The outlet (42) of the grinding processing area is connected to the storage channel (63) of the storage unit (61) through the material receiving channel (73) or sequentially through the material receiving channel (73) and the conveying mechanism; during grinding processing, the bearing roller leaves the outlet (42) and passes through the material receiving channel (73) or sequentially passes through the material receiving channel (73) and the conveying mechanism to enter the storage channel (63) of the storage unit (61); The feeding subsystem is provided with a feeding channel (83); the feeding channel (83) is provided in the upper space of the outer wall of the grinding sleeve (33) and is communicated with the inlet (41); The operation of the handling robot (64) includes: removing an empty storage unit (61) from the storage station, and docking the channel entrance of the storage unit (61) with the receiving channel (73) or the conveying mechanism to receive the bearing rollers from the receiving channel (73); when the storage unit (61) is fully loaded with the bearing rollers, the handling robot (64) returns the storage unit (61) to the storage station for temporary storage; according to the decision of the control subsystem, the handling robot (64) moves the selected storage unit (61) in the storage station, and docks the channel outlet of the storage unit (61) with the feeding channel (83) to unload the bearing rollers; The feeding channel (83) is a curved channel, a broken line channel or a zigzag combined channel; in the process of entering the inlet (41) through the feeding channel (83), the bearing rollers from the storage unit (61) roll in the feeding channel (83) from top to bottom in a single-line queue, with the axes parallel to each other and the rolling surfaces (15) close to the rolling surface (15) along the curved path, broken line path or zigzag combined path by virtue of the deadweight of the bearing rollers; the width of the feeding channel (83) matches the axial length of the bearing rollers.

6. The external circulation system for cyclic grinding of rolling surfaces of bearing rollers according to claim 1, characterized in that: The invention relates to a bearing roller rolling surface circulation grinding device suitable for being installed with a sleeve-type grinding tool kit, wherein the grinding tool kit comprises a grinding shaft and a grinding sleeve (33) arranged horizontally, wherein the outer peripheral surface of the grinding shaft is provided with a group of not less than three linear grooves (21) distributed in a circumferential array, and the inner wall of the grinding sleeve (33) is provided with a group of multiple coaxial annular grooves (24) of equal diameter, and corresponding to each annular groove (24), a through-hole for the bearing roller to enter or leave the grinding processing area is provided, wherein the through-hole leads to the upper outer wall of the grinding sleeve (33), and the through-hole is both the entrance for the bearing roller to enter the grinding processing area and the exit for the bearing roller to leave the grinding processing area; the bearing roller enters the grinding processing area from the through-hole or leaves the grinding processing area from the through-hole in a time-sharing manner with the grinding process, and the grinding process is suspended during the period when the bearing roller enters or leaves the grinding processing area; The storage space of the storage unit (61) is divided into a plurality of storage channels (63) parallel to each other, and the storage channels (63) are arranged at an angle relative to a horizontal plane so as to facilitate the bearing rollers to roll unpowered in the storage channels (63) under the action of their own gravity; the width of the storage channels (63) matches the axial length of the bearing rollers; the upper end of the storage channels (63) is the channel entrance, and the lower end of the storage channels (63) is the channel exit and is provided with an exit gate (62); the bearing rollers are sequentially stored in the storage channels (63) in a single-line queue, with their axes parallel to each other and their rolling surfaces (15) close to the rolling surfaces (15); when the bearing rollers are unloaded from the storage channels (63), the exit gate (62) is in an open state; The material storage units (61) are installed in layers in the material storage station; The material receiving subsystem includes a material unloading robot, a front-station material receiving unit (78) and a front-station transition unit (79); The front-station receiving unit (78) and the front-station transition unit (79) are both provided with a material storage channel (63) consistent with that in the material storage unit (61); The feeding subsystem includes a post-station transition unit (81), a post-station feeding unit (82) and a loading robot; The post-station transition unit (81) and the post-station feeding unit (82) are both provided with a storage channel (63) consistent with that in the storage unit (61); The loading robot and the unloading robot are both provided with a group of parallel arranged finger-shaped grippers (93), and the ends of the finger-shaped grippers (93) are provided with suction cups (94) for adsorbing the bearing rollers, and the suction cups (94) are vacuum suction cups or electromagnetic suction cups; Whenever the bearing roller in the grinding processing area completes a round of grinding processing, an unloading and loading operation is performed; the grinding shaft is rotated until a certain linear groove (21) is opposite to the through-port, and the finger-shaped clamper (93) of the unloading robot is respectively inserted into each through-port, and a bearing roller located in the linear groove (21) is adsorbed and taken out from each through-port in parallel, and then the bearing roller is respectively placed in each storage channel (63) of the front-station receiving unit (78) or placed in the conveying mechanism, and the bearing roller placed in the conveying mechanism passes through the conveying mechanism and enters each storage channel (63) of the front-station receiving unit (78); the finger-shaped clamper (93) of the loading robot is taken out from the Each storage channel (63) of the rear feeding unit (82) absorbs and takes out a bearing roller in parallel, and then places the bearing roller into the linear groove (21) through each opening according to the posture requirement of the grinding processing area for the bearing roller, and the finger-shaped clamp (93) is withdrawn from the opening; the grinding shaft is continued to rotate until the next linear groove (21) is opposite to the opening, and the above operation is repeated until the bearing rollers of the previous round of grinding processing are completely unloaded from the grinding processing area and the subsequent bearing rollers are loaded, and the grinding process continues; in each round of grinding processing, the average material removal amount of the bearing roller in the diameter direction needs to be controlled within 0.5 microns; When the station-front material receiving unit (78) is fully loaded with bearing rollers, the channel entrance of the station-front transition unit (79) docks with the channel exit of the station-front material receiving unit (78), and all the bearing rollers in the station-front material receiving unit (78) are transferred to the material storage channel (63) of the station-front transition unit (79) in a rolling manner; the channel exit of the fully loaded station-front transition unit (79) docks with the channel entrance of the unloaded material storage unit (61) in the material storage station, and all the bearing rollers in the station-front transition unit (79) are loaded into the material storage channel (63) of the material storage unit (61) in a rolling manner; According to the decision of the control subsystem, the channel entrance of the post-station transition unit (81) is connected to the channel exit of the selected storage unit (61) in the storage station, and all the bearing rollers in the storage unit (61) are unloaded to the storage channel (63) of the post-station transition unit (81) in a rolling manner; the channel exit of the fully loaded post-station transition unit (81) is connected to the channel entrance of the post-station feeding unit (82), and all the bearing rollers in the post-station transition unit (81) are transferred to the storage channel (63) of the post-station feeding unit (82) in a rolling manner.

7. The external circulation system for cyclic grinding of rolling surfaces of bearing rollers according to claim 3 or 5, characterized in that: The material receiving subsystem is provided with a material receiving buffer station, and the material receiving buffer station is provided with a material receiving station and a buffer station, and the material receiving buffer station comprises a first bracket (91) and a first guide rail (92), the first bracket (91) is used to place the material storage unit (61), and the first bracket (91) and the material storage unit (61) thereon are switched between the material receiving station and the buffer station along the first guide rail (92); the handling robot (64) moves the empty material storage unit (61) from the material storage station and places it on the first bracket (91) located at the buffer station; the material storage unit (61) located at the material receiving station is switched along the first guide rail (92) between the material receiving station and the buffer station. A guide rail (92) moves to make the channel entrance dock with the material receiving transition channel (75) or the material receiving channel (73) or the conveying mechanism to receive the bearing roller from the material receiving mechanism or the material receiving channel (73); the fully loaded storage unit (61) is switched to the buffer station, and the empty storage unit (61) is switched to the material receiving station; the handling robot (64) sends the fully loaded storage unit (61) located at the buffer station back to the storage station for temporary storage, and removes the empty storage unit (61) from the storage station again and places it on the first bracket (91) located at the buffer station, and this is repeated continuously; The feeding subsystem is provided with a feeding buffer station, which is provided with a feeding station and a buffer station. The feeding buffer station comprises a second bracket (91') and a second guide rail (92'). The second bracket (91') is used to place the storage unit (61). The second bracket (91') together with the storage unit (61) thereon switches between the feeding station and the buffer station along the second guide rail (92'); the handling robot (64) removes the fully loaded storage unit (61) selected by the control subsystem from the storage station and places it on the second bracket (91') located at the buffer station. ; The storage unit (61) located at the feeding station moves along the second guide rail (92') so that the channel outlet docks with the feeding channel (83) to unload the bearing roller; the empty storage unit (61) is switched to the buffer station, and the fully loaded storage unit (61) is switched to the feeding station; the handling robot (64) returns the empty storage unit (61) located at the buffer station to the storage station, and removes the fully loaded storage unit (61) selected by the control subsystem from the storage station again and places it on the second bracket (91') located at the buffer station, and repeats this process continuously.

8. An external circulation system for cyclic grinding of the rolling surface of a bearing roller, wherein the bearing roller refers to a bearing roller to be processed, and the bearing roller is a cylindrical roller (11) or a tapered roller (12) or a spherical roller (13), wherein the cylindrical roller (11) includes an arc-convex cylindrical roller and a needle roller, the tapered roller (12) includes an arc-convex tapered roller, and the spherical roller (13) includes a symmetrical spherical roller without a spherical base surface, a symmetrical spherical roller with a spherical base surface, and an asymmetrical spherical roller; a grinding processing area is defined as an area where the bearing roller undergoes grinding; during grinding, the bearing roller enters the grinding processing area from the entrance (41) of the grinding processing area and leaves the grinding processing area from the exit (42) of the grinding processing area; It is characterized in that It includes a material receiving mechanism, a lifting mechanism and a material feeding channel (83); The material receiving mechanism is used to send the bearing rollers leaving the outlet (42) of the grinding processing area into the lifting mechanism in a queue-moving and posture-controlled manner; The lifting mechanism is used to lift the bearing rollers upward in a manner of single isolation, single line queue, and posture control to dock with the feed channel (83) or dock with the feed channel (83) through a conveying mechanism, and the bearing rollers enter the feed channel (83) through the lifting mechanism or through the lifting mechanism and the conveying mechanism in sequence; The feed channel (83) is a curved channel, a broken line channel or a zigzag channel. In the process of entering the entrance (41) of the grinding processing area through the feed channel (83), the bearing rollers from the lifting mechanism or the conveying mechanism roll in the feed channel (83) from top to bottom in a single-line queue, with axes parallel to each other and rolling surfaces (15) close to the rolling surface (15) in the process of entering the entrance (41) of the grinding processing area through the feed channel (83). The width of the feed channel (83) matches the axial length of the bearing rollers. The process in which all the bearing rollers complete one time of entering the grinding processing area from the inlet (41), undergoing grinding in the grinding processing area, and leaving the grinding processing area from the outlet (42) is called one grinding cycle; As the grinding cycles increase, the selective material removal effect between the bearing rollers in the grinding process area gradually extends to the entire batch of bearing rollers, and the dimensional consistency of the bearing rollers continues to improve until the specified technical indicators are reached; The invention relates to a bearing roller rolling surface circulation grinding device equipped with a grinding disc set, wherein the grinding disc set comprises a lower grinding disc (31) and an upper grinding disc (32), wherein the front surface of the lower grinding disc (31) is provided with a group of not less than three straight grooves (21) distributed radially in a plane or radially distributed in a conical surface, or radially distributed inward concave arc grooves, and the front surface of the upper grinding disc (32) is correspondingly provided with a plane spiral groove or a conical surface spiral groove or an outward convex arc rotary surface spiral groove, and the entrance (41) of the grinding processing area is provided at the inner edge of the plane spiral groove or the conical surface spiral groove or the outward convex arc rotary surface spiral groove adjacent to the upper grinding disc (32). One end of the grinding process area leads to the back side of the upper grinding disc (32); the outlet (42) of the grinding process area is located at one end of the outer edge of the corresponding plane spiral groove, conical spiral groove or convex arc rotary spiral groove adjacent to the upper grinding disc (32); during grinding, the bearing rollers continuously enter the grinding process area from the inlet (41) and continuously leave the grinding process area from the outlet (42); the bearing rollers enter the grinding process area from the inlet (41) and leave the grinding process area from the outlet (42) synchronously with the grinding process; the bearing rollers are cylindrical rollers (11) or tapered rollers (12); The material receiving mechanism includes a U-shaped guide frame (71), a support base plate (72) and a material receiving transition channel (75); the U-shaped guide frame (71) is fixedly connected to the lower grinding disc (31), the U-shaped opening is opposite to the linear groove (21) or the concave arc groove, and the inner width of the U-shaped guide frame (71) matches the diameter of the bearing roller; the support base plate (72) is fixedly connected to the bed of the circulating grinding equipment, arranged around the outer edge of the lower grinding disc (31), and set under the U-shaped guide frame (71); under the constraint guidance of the U-shaped guide frame (71) and the support of the support base plate (72), the bearing roller maintains its posture in the grinding processing area during the process of leaving the grinding processing area from the outlet (42); the material receiving transition channel (75) includes a circular arc channel (7 6), the arc channel (76) is arranged around the outer edge of the lower grinding disc (31) and docked with the support base plate (72), the arc channel (76) gradually sinks from the docking point with the support base plate (72) to the end point of the arc channel (76) to ensure that the U-shaped guide frame (71) does not interfere with the bearing roller that gradually escapes from the constraint and guidance of the U-shaped guide frame (71) when passing over the end point of the arc channel (76), the width of the material connection transition channel (75) matches the axial length of the bearing roller; the material connection transition channel (75) docks with the lifting mechanism or docks with the lifting mechanism through the conveying mechanism, and the bearing roller passes through the material connection transition channel (75) or passes through the material connection transition channel (75) and the conveying mechanism in sequence to enter the lifting mechanism; The feeding channel (83) is arranged in the upper space on the back side of the upper grinding disc (32) and is communicated with the inlet (41).

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