Grinding disc assembly for a finishing of rolling surfaces of bearing rollers and a grinding device thereof

Abstract

A grinding disc assembly for a finishing of rolling surfaces of bearing rollers and a grinding device, the grinding device includes the grinding disc assembly, a main machine, and an external circulation equipment. The grinding disc assembly includes a lower grinding disc, an upper grinding disc, and a separating disc. A front surface of the lower grinding disc is flat or conical, and is equipped with a planar spiral groove or a conical spiral groove. The main machine includes a rotary component and a loading component. During grinding process, after completing one grinding process in the grinding processing area, the bearing rollers are temporarily stored in the storage bins of the external circulation equipment and the order of entering the grinding processing area is changed before entering the grinding area again, and continuously improving the size consistency of the bearing rollers until the specified technical indicators are met.

Description

CROSS REFERENCE TO RELATED APPLICATIONS

[0001] This application claims foreign priority of Chinese Patent Application No. 202311108571.2, filed on Aug. 29, 2023 in the China National Intellectual Property Administration, the disclosures of all of which are hereby incorporated by reference.TECHNICAL FIELD

[0002] The present disclosure relates to the technical field of finishing of bearing rollers technology, in particular to a grinding disc assembly for a finishing of rolling surfaces of bearing rollers and a grinding device thereof.BACKGROUND

[0003] Roller bearings are widely used in various types of rotating machinery. The size consistency of rolling surfaces of the bearing rollers, an important component of roller bearings, significantly affects the performance of the roller bearings.

[0004] Currently, the known processing flow for the rolling surfaces of bearing rollers includes: blank forming (turning, cold heading, or rolling), rough machining (soft grinding of the rolling surfaces), heat treatment, semi-finish machining (hard grinding of the rolling surface), and finishing, where the primary processing method for the finishing of the rolling surfaces is center-less grinding combined with ultra-precision grinding. However, due to the fundamental principles of center-less grinding and ultra-precision grinding, it is challenging to effectively improve the diameter dispersion of the rolling surfaces of bearing rollers.

[0005] Chinese patent of CN108908094A discloses a grinding disc, equipment, and method for a finishing of rolling surfaces of cylindrical rollers. The equipment includes a main machine, a grinding disc assembly, and an external roller circulation equipment. The grinding disc assembly includes a first grinding disc and a second grinding disc, with the front side of the first grinding disc featuring a set of radially distributed linear grooves, and the front side of the second grinding disc featuring one or more helical grooves. The external roller circulation equipment includes a roller collecting device, a roller conveying mechanism, a roller sorting mechanism, and a roller feeding mechanism.

[0006] Chinese patent document CN108723979A discloses a grinding disc, equipment, and method for finishing of rolling surfaces of cone rollers. The equipment also includes a main machine, a grinding disc assembly, and an external roller circulation equipment. Similar to the previous patent, the grinding disc assembly consists of a first grinding disc and a second grinding disc, with the first grinding disc featuring a set of radially distributed linear grooves and the second grinding disc including one or more helical grooves. The external roller circulation equipment includes a roller collecting device, a roller conveying mechanism, a roller sorting mechanism, and a roller feeding mechanism.

[0007] The processing methods disclosed in these patents belong to precision evolution processing methods, which have the capability to remove more material from the rolling surfaces of larger diameter bearing rollers and less material from the rolling surfaces of smaller diameter bearing rollers. This is beneficial for improving the size consistency of the rolling surfaces of bearing rollers under mass production conditions. The key to achieving this processing method is how to ensure that the processed bearing rollers continuously and stably rotate in the linear grooves. Although these patents provide methods for grinding ferromagnetic and non-ferromagnetic material bearing rollers by introducing electromagnetic suction through magnetic structures set within grinding discs with helical grooves, and by optimizing the pairing of helical groove working surface materials and linear groove working surface materials, both types of methods have varying degrees of limitations. Due to the limited materials that can be used as working surfaces for grinding discs, it is often challenging to optimize the pairing of helical groove working surface materials and linear groove working surface materials. Introducing electromagnetic suction can effectively resolve the self-rotation problem of the processed bearing rollers within the linear grooves; however, the complex electromagnetic structures and their control brought new challenges for high-precision grinding of bearing rollers.SUMMARY

[0008] The bearing rollers referred to in this disclosure are processed bearing rollers, which can be either cylindrical rollers or cone rollers. In this disclosure, needle rollers are classified as cylindrical rollers. The surfaces of the cylindrical rollers are defined to include a rolling surface and an end surface of the cylindrical rollers, while the surfaces of the cone rollers are defined to include a rolling surface and a large end surface of the cone rollers, with a cone angle of the cone roller is denoted as 2φ.

[0009] The conveying mechanism described in this disclosure is used to transport the bearing rollers in a single line queue with controlled posture from one location to another. The conveying mechanism can be a flat belt conveyor, a double round belt conveyor, or any other conveying mechanism known in the art, or it may be a conveying mechanism developed in the future for the purpose of this disclosure. This disclosure does not impose specific structural limitations on the conveying mechanism.

[0010] The lifting mechanism described in this disclosure is used to elevate the bearing rollers in an isolated, single line queue with controlled posture from a lower position to a higher position. This lifting mechanism can be a push disc lifting mechanism, a chain disc lifting mechanism, or any other lifting mechanism known in the art, or it may be a lifting mechanism developed in the future for the purpose of this disclosure. This disclosure does not impose specific structural limitations on the lifting mechanism.

[0011] To address the problems existing in the prior art, this disclosure proposes a grinding disc assembly and grinding equipment for a finishing of rolling surfaces of bearing rollers, which possess the capability for high-volume precision finishing of the rolling surfaces of bearing rollers. For both cylindrical rollers and cone rollers, the grinding disc assembly in this disclosure does not include linear groove structures similar to those found in the prior art. During the grinding process, the relative motion between the bearing rollers and the working surfaces of the grinding disc assembly is a combination of rolling and differential sliding, which naturally ensures the continuous and stable self-rotation of the bearing rollers during the grinding process.

[0012] To solve the above problems, the present disclosure provides a grinding disc assembly for a finishing of rolling surfaces of bearing rollers, including: a lower grinding disc, an upper grinding disc, and a separating disc, a front surface of the lower grinding disc is arranged opposite a front surface of the upper grinding disc, with the separating disc positioned in a gap between the front surface of the lower grinding disc and the front surface of the upper grinding disc.

[0013] Furthermore, the grinding disc assembly has three configurations.

[0014] Configuration one: the front surface of the lower grinding disc is a working surface of the lower grinding disc, which is flat, and the front surface of the upper grinding disc is equipped with a planar spiral groove, and a surface of the planar spiral groove is a working surface of the upper grinding disc, and an axis of the planar spiral groove aligns with an axis of the upper grinding disc; and the separating disc is a flat disc that features linear isolation grooves arranged in a flat radial and a circumferential array, with the axes of the linear isolation grooves array being the axis of the separating disc; the upper grinding disc is coaxial with the separating disc, and the axis of the upper grinding disc and the axis of the separating disc are perpendicular to the working surface of the lower grinding disc.

[0015] Furthermore, an area enclosed by the working surface of the lower grinding disc and the working surface of the upper grinding disc is defined as a grinding processing zone, an entrance for the bearing rollers to enter the grinding processing zone is located at one end of the planar spiral groove, near an inner edge of the upper grinding disc, and leads to a back of the upper grinding disc; an other end of the planar spiral groove, adjacent to an outer edge of the upper grinding disc, serves as an exit for the bearing rollers to leave the grinding processing zone; the linear isolation grooves extend from the entrance outward beyond an outer edge of the lower grinding disc, and a width of the linear isolation grooves is matched to a radial size of the bearing rollers.

[0016] Furthermore, during a grinding process, the bearing rollers within the grinding processing zone are spaced apart by the separating disc and distributed discretely along the planar spiral groove of the front surface of the upper grinding disc; and the lower grinding disc and the upper grinding disc approach each other to apply grinding loads to the bearing rollers distributed within the grinding processing zone, resulting in a line contact between the bearing rollers and the working surfaces of the lower grinding discs and the upper grinding discs, respectively; and the lower grinding disc and the upper grinding disc rotate relative to each other around the axis of the separating disc, causing the bearing rollers to continuously roll between the working surfaces of the lower grinding discs and upper grinding discs under friction drive from both surfaces; simultaneously, the bearing rollers move from the entrance to the exit along the planar spiral groove and the linear isolation grooves, respectively, with the surfaces of the cylindrical rollers or the conical rollers continuously tangent to the working surface of the upper grinding disc; and the rolling surfaces of the bearing rollers experience differential sliding against the working surfaces of the lower grinding discs and the upper grinding discs, thus achieving a grinding process of the rolling surfaces.

[0017] Furthermore, during the grinding process, the separating disc rotates around its own axis to drive the bearing rollers to revolve around the axis of the separating disc; alternatively, the separating disc is driven to rotate around its own axis by the bearing rollers within the grinding processing zone.

[0018] Furthermore, when the bearing rollers are placed as a reference on the working surface of the lower grinding disc and maintain a contact state during the grinding process, a geometric center of the bearing rollers on the working surface of the lower grinding disc lies on a plane parallel to the working surface of the lower grinding disc, referred to as a base plane of the lower grinding disc; and when the bearing rollers are cylindrical rollers, axes of the cylindrical rollers are located on the base plane of the lower grinding disc; and when the bearing rollers are the conical rollers, axes of the conical rollers intersect the base plane of the lower grinding disc at an angle φ, which is half of the cone angle of the conical rollers.

[0019] Furthermore, when the bearing rollers are placed as a reference within the planar spiral groove and maintains the contact state during the grinding process, the geometric center of the bearing rollers within the planar spiral groove lies on a helical line, which is referred to as a groove baseline, and the groove baseline lies on an upper grinding disc base plane; during the grinding process, the upper grinding disc base plane coincides with the base plane of the lower grinding disc.

[0020] Furthermore, the working surface of the upper grinding disc is a pair of conjugate surfaces with the surfaces of the bearing rollers, a planar helical movement of the bearing rollers around the axis of the upper grinding disc represents a conjugate motion between the upper grinding disc and the bearing rollers.

[0021] Configuration two: the front surface of the lower grinding disc is the working surface of the lower grinding disc, which is a conical surface with an axis of the conical surface being the axis of the lower grinding disc; and the front surface of the upper grinding disc features conical spiral grooves, with a groove surface of the conical spiral grooves being the working surface of the upper grinding disc, and an axis of each conical spiral groove aligning with the axis of the upper grinding disc; and the separating disc is a conical disc, which has linear isolation grooves arranged in a conical radial and circumferential array, with axis of the linear isolation grooves array being the axis of the separating disc; and the lower grinding disc, the upper grinding disc, and the separating disc are coaxial.

[0022] Furthermore, the area enclosed by the working surfaces of the lower and upper grinding discs forms the grinding processing zone; the entrance for the bearing rollers to enter the grinding processing zone is located at one end of the conical spiral grooves adjacent to the inner edge of the upper grinding disc, leading to the back of the upper grinding disc; and another end of the conical spiral grooves adjacent to the outer edge of the upper grinding disc serves as the exit for the bearing rollers leaving the grinding processing zone; the linear isolation grooves extend from the entrance to beyond the outer edge of the upper grinding disc, with the width of the linear isolation grooves matching the radial dimensions of the bearing rollers.

[0023] Furthermore, during the grinding process, the bearing rollers in the grinding processing zone are separated by the separating disc and distributed discretely within the linear isolation grooves along the conical spiral grooves of the upper grinding disc front surface; the lower grinding disc and the upper grinding disc move closer to apply grinding loads on the bearing rollers distributed in the grinding processing zone, resulting in line contact between the bearing rollers and both the working surfaces of the lower grinding disc and upper grinding disc; the lower grinding disc and the upper grinding disc rotate relative to each other around the axis of the separating disc, causing the bearing rollers to roll continuously between the working surfaces of the lower grinding disc and upper grinding disc under the friction drive from those working surfaces; at the same time, the bearing rollers move from the entrance to the exit along the conical spiral grooves and the linear isolation grooves, with either the surfaces of the cylindrical rollers or the surfaces of the conical rollers continuously tangent to the working surface of the upper grinding disc; and the rolling surfaces of the bearing rollers engage in differential sliding with the working surfaces of both the lower grinding disc and the upper grinding disc, achieving the grinding process of the rolling surfaces.

[0024] Furthermore, during the grinding process, the separating disc rotates around its own axis, propelling the bearing rollers to revolve around the axis of the separating disc; alternatively, the separating disc is rotated around its own axis by the bearing rollers within the grinding processing zone.

[0025] Furthermore, when the bearing roller is positioned as a reference on the working surface of the lower grinding disc and maintains the contact state of the grinding process, the geometric center of the bearing rollers on the working surface of the lower grinding disc lies on the conical surface that is coaxial with the working surface of the lower grinding disc and has a same conical angle; the conical surface is referred to the lower grinding disc base conical surface; when the bearing rollers are the cylindrical rollers, the axis of the cylindrical rollers lies on the lower grinding disc base conical surface; when the bearing rollers are the conical rollers, the axis of the conical rollers lies within an axial section of the lower grinding disc base conical surface, intersecting with an intersection line of the axial section of the lower grinding disc base conical surface at the angle φ, which is half of the conical angle of the conical rollers.

[0026] Furthermore, when the bearing roller is placed as a reference within the conical spiral grooves and maintains the contact state of the grinding process, the geometric center of the bearing roller in the conical spiral grooves lies on the helical line, referred to as the conical spiral groove baseline; and the groove baseline lies on the conical spiral conical surface, referred to as a upper grinding disc base conical surface; during grinding, the upper grinding disc base conical surface coincides with the lower grinding disc base conical surface.

[0027] Furthermore, the working surface of the upper grinding disc and the surfaces of the bearing rollers form a pair of conjugate surfaces; the conical helical motion of the bearing roller around the axis of the upper grinding disc represents the conjugate motion between the upper grinding disc and the bearing rollers.

[0028] Furthermore, configuration three: the configuration three is only applicable for the finishing of the rolling surfaces of cylindrical rollers, the front face of the lower grinding disc is the working surface of the lower grinding disc, which is flat; the front face of the upper grinding disc is the working surface of the upper grinding disc, which is also flat; and the separating disc is a flat disc that features linear isolation grooves arranged in a radial and circumferential array, with the axis of the array of linear isolation grooves aligned with the axis of the separating disc; the working surface of the upper grinding disc is parallel to that of the lower grinding disc, and the axis of the separating disc is perpendicular to both the working surfaces of the upper grinding disc and lower grinding disc.

[0029] Furthermore, the area enclosed by the working surfaces of the lower grinding disc and the upper grinding disc forms the grinding processing area; the entrance for the cylindrical roller to enter the grinding processing area is located at the inner edge of the upper grinding disc and leads from the working surface of the upper grinding disc to its back; and the exit for the cylindrical roller to leave the grinding processing area is at the outer edge of the upper grinding disc; the linear isolation grooves extend from the entrance beyond the outer edge of the lower grinding disc, and the width of the linear isolation groove matches the radial size of the cylindrical rollers, to allow the cylindrical roller slide along the linear isolation groove.

[0030] Furthermore, during the grinding process, the cylindrical rollers in the grinding processing area is separated by the separating disc within each linear isolation groove; the lower grinding disc and the upper grinding disc approach each other to apply a grinding load to the cylindrical roller distributed within the grinding processing area, resulting in line contact between the rolling surface of the cylindrical roller and the working surfaces of both the lower and upper grinding discs; the lower grinding disc and the upper grinding disc rotate relative to each other around the axis of the separating disc; the cylindrical rollers roll continuously between the working surfaces of the lower grinding disc and upper grinding disc, driven by friction, while simultaneously moving from the entrance to the exit along the linear isolation grooves; and the rolling surfaces of the cylindrical rollers experience differential sliding with both the working surfaces of the lower grinding disc and the upper grinding disc, achieving the grinding process of the rolling surfaces.

[0031] Furthermore, during the grinding process, the separating disc rotates around its own axis, propelling the bearing rollers to revolve around the axis of the separating disc; alternatively, the separating disc is driven to rotate around its own axis by the cylindrical rollers within the grinding processing area.

[0032] Furthermore, when the cylindrical roller is used as a reference and is placed within the grinding disc assembly while maintaining contact with the lower grinding disc and the upper grinding disc during the grinding process, the geometric center of the cylindrical roller within the same linear isolation groove lie along a same line, referred to as a isolation groove baseline; the isolation groove baseline intersects perpendicularly with the axis of the separating disc and has an eccentric distance; the axis of the cylindrical rollers lies on the isolation groove baseline.

[0033] For the grinding disc assembly of the three configurations described, during the grinding process, the bearing rollers distributed in the grinding area coordinate to bear the grinding load. The bearing rollers, based on the working surfaces of the lower grinding disc and upper grinding disc, experience a selective material removal effect. Larger diameter bearing rollers bear a greater grinding load and have more material removed, while smaller diameter bearing rollers bear a smaller grinding load and have less material removed.

[0034] The present disclosure further provides a grinding device for a finishing of rolling surfaces of bearing rollers, including a main machine, an external circulation equipment, and the grinding disc assembly for the finishing of rolling surfaces of bearing rollers.

[0035] Furthermore, the main machine includes a rotary component and a loading component.

[0036] Furthermore, the rotary component is configured to drive the lower grinding disc to rotate relative to the upper grinding disc, and the loading component is configured to drive the lower grinding disc to approach the upper grinding disc in order to apply the grinding load to the bearing rollers distributed within the grinding processing area.

[0037] Furthermore, the external circulation equipment includes a material receiving device, a feeding device, a storage station, and a plurality of storage bins, and a controller.

[0038] Furthermore, the storage station is configured to store the storage bins; the storage bins are configured to temporarily hold the bearing rollers; each storage bin includes one or more storage channels, wherein the bearing rollers are stored in a single line queue, with axes parallel to each other and rolling surfaces in close proximity to each other, to reduce mutual collisions between the bearing rollers and avoid impact damage; the storage channel runs vertically from the channel entrance to the channel exit; the storage bins serve as a hardware basis for adjusting order and position of the bearing rollers in a bearing roller queue under conditions where there is no physical contact between the bearing rollers loaded into different storage bins; the bearing roller queue includes a closed-loop queue of all bearing rollers located within the grinding processing area and the external circulation equipment.

[0039] Furthermore, the material receiving device is configured to load the bearing rollers leaving the exit of the grinding processing area into empty storage bins in way of the bearing roller queue being processed and a posture being controlled, to avoid collision damage caused by mutual collision between the bearing rollers.

[0040] Furthermore, the feeding device is configured to unload the bearing rollers from a selected storage bin within the storage station based on decisions from the controller, to enter the grinding processing area in a controlled posture according to posture requirements of the bearing rollers, to avoid collision damage caused by mutual collision between the bearing rollers.

[0041] Furthermore, the bearing rollers in the same storage channel enter the storage channel and exit in a first-in, first-out sequence.

[0042] Furthermore, the controller is configured to decide when to unload the bearing rollers from which of the storage bins; the controller serves as a software basis for adjusting the order and position of the bearing rollers in the bearing roller queue under conditions where there is no physical contact between the bearing rollers loaded into different storage bins.

[0043] Furthermore, during the grinding process, the bearing rollers that have completed a grinding operation leave the grinding processing area from the exit, the bearing rollers leaving the grinding processing area are temporarily stored in the empty storage bins and placed in the storage station; and based on the decisions of the controller, the bearing rollers are unloaded from the selected storage bin and sent from the entrance into the grinding processing area to continue receiving grinding; and the order and position of the bearing rollers entering the grinding processing area are updated according to the decisions of the controller, thus achieving a block mixing and swapping of the bearing rollers without physical contact between the bearing rollers loaded into different storage bins.

[0044] Furthermore, an entire process of the bearing rollers constitutes one grinding cycle, includes entering into the grinding processing area from the entrance, undergoing grinding within the grinding processing area, and exiting the grinding processing area from the exit.

[0045] Furthermore, the changes in the order and position of the bearing rollers leaving the grinding processing area from the exit that occur within the external circulation equipment modify the combination of the bearing rollers entering the grinding processing area subsequently, thereby extending a material selective removal effect occurring among the bearing rollers in the grinding processing area to an entire batch of bearing rollers; with an increase in grinding cycles, and a size consistency of the bearing rollers improves continuously until specified technical indicators are reached.

[0046] On one hand, the external circulation equipment is configured to manage the grinding processing of large batches of the bearing rollers exceeding a capacity of the grinding processing area; and on the other hand, to establish a logistics channel for the bearing rollers between the exit and the entrance; the external circulation equipment is also configured for mixing and location exchanging the bearing rollers, to weak the sequence and position characteristics of the bearing rollers in the bearing roller queue.

[0047] Furthermore, storage space of the storage bins is divided into multiple parallel storage channels, which are arranged at an inclination relative to the horizontal plane; a width of each storage channel matches an axial length of the bearing rollers; an upper end of each storage channel is the entrance, and a lower end of each storage channel is the exit, equipped with an exit gate; the bearing rollers are sequentially stored in the storage channels in the single line queue, with their axes parallel to each other and the rolling surfaces closely adjacent to the rolling surfaces; the exit gate is in an open state when the bearing rollers are unloaded from the storage channels.

[0048] Furthermore, the storage bins are installed in layers within the storage station; and the receiving device includes a receiving mechanism, a front station receiving mechanism, and a front station transition mechanism.

[0049] Furthermore, both the front station receiving mechanism and the front station transition mechanism are equipped with the storage channels consistent with those in the storage bins.

[0050] Furthermore, the receiving mechanism includes a support base disc and a receiving transition channel; the support base disc is fixedly connected to a bed of the grinding device, arranged around the outer edge of the lower grinding disc, and positioned below the separating disc; under a constraint guidance of the linear isolation grooves and a support of the support base disc, the bearing rollers maintain their posture as they leave the grinding processing area from the exit; the receiving transition channel includes an arc channel, which is arranged around the outer edge of the lower grinding disc and connects to the support base disc; and the arc channel gradually descends from the connection point with the support base disc to its endpoint, ensuring that the linear isolation grooves passes above the endpoint of the arc channel without interfering with the bearing rollers that are gradually disengaging from the constraint guidance of the linear isolation grooves; and a width of the receiving transition channel matches the axial length of the bearing rollers; the receiving transition channel connects to the storage channels of the front station receiving mechanism or connects to the storage channels of the front station receiving mechanism through a conveyor mechanism; and the bearing rollers enter the storage channels of the front station receiving mechanism via the receiving transition channel, or they sequentially pass through the receiving transition channel and the conveyor mechanism to enter the storage channels of the front station receiving mechanism.

[0051] Furthermore, when the front station receiving mechanism is fully loaded with bearing rollers, a channel entrance of the front station transition mechanism connects to a channel exit of the front station receiving mechanism, allowing all bearing rollers within the front station receiving mechanism to be transferred in a rolling manner to the storage channels of the front station transition mechanism; the channel exit of the fully loaded front station transition mechanism connects to the channel entrance of the empty storage bins within the storage station, allowing all bearing rollers within the front station transition mechanism to be loaded into the storage channels of the storage bins in the rolling manner.

[0052] Furthermore, the feeding device includes a rear station transition mechanism, a rear station feeding mechanism, and a feeding channel; both the rear station transition mechanism and the rear station feeding mechanism are equipped with the storage channels consistent with those in the storage bin; the feeding channel is positioned in upper space at the back of the upper grinding disc and communicates with the entrance.

[0053] Furthermore, based on the decision of the controller, the channel entrance of the rear station transition mechanism connects to the channel exit of the selected storage bin in the storage station, unloading all the bearing rollers in the storage bin in a rolling manner to the storage channel of the rear station transition mechanism, thereby emptying the storage channel of the storage bins; the channel exit of the fully loaded rear station transition mechanism connects to the channel entrance of the rear station feeding mechanism, allowing the bearing rollers within the rear station transition mechanism to be transferred in a rolling manner to the storage channel of the rear station feeding mechanism; the channel exits of multiple storage channels in the rear station feeding mechanism sequentially connect to the feeding channel or sequentially connect to the feeding channel through the feeding transition channel to send the bearing rollers into the entrance through the feeding channel.

[0054] Furthermore, the feeding channel is a curved channel, a zigzag channel, or a winding combination channel; during a process of entering the entrance via the feeding channel, the bearing rollers from the rear station feeding mechanism roll down in a single line queue, with their axes parallel to each other and their rolling surfaces closely adjacent to the rolling surfaces along a curved path, a zigzag path, or a twisted combination path, assisted by their own weight; a width of the feeding channel matches the axial length of the bearing rollers, to constrain the posture of the bearing roller when rolling in the feeding channel and avoid getting stuck.

[0055] Furthermore, the grinding device for the finishing of the rolling surfaces of the bearing rollers, each storage bin has a storage space composed of one or more vertically arranged parallel storage channels; the storage channels are the curved path, the zigzag path, or have the twisted combination path; during a process of depositing into or unloading from the storage bins, the bearing rollers roll in the storage channel from top to bottom under their own weight, maintaining a single line alignment with their axes parallel and their rolling surfaces close to each other along the curved path, the zigzag path, or the twisted path; the width of the storage channel matches the axial length of the bearing rollers; the upper end of the storage channel serves as the channel entrance, while the lower end serves as the channel outlet and is equipped with an outlet gate; the bearing rollers are stored in the storage channel in a single line arrangement, with their axes parallel and rolling surfaces close together, in an upward sequence; the outlet gate is in the open state when the bearing rollers are unloaded from the storage channel.

[0056] Furthermore, the storage station is equipped with a transport robot for moving the storage bins; and the receiving device is equipped with a receiving mechanism.

[0057] Furthermore, the receiving mechanism includes the supporting base disc and the receiving transition channel; the supporting base disc is fixedly connected to the bed of the grinding device, arranged around the outer edge of the lower grinding disc, and positioned below the separating disc; under the guidance of the linear isolation grooves and the support of the supporting base disc, the bearing rollers maintain their posture as they leave the grinding area from the exit; the receiving transition channel includes an arc channel, which is arranged around the outer edge of the lower grinding disc and interfaces with the supporting base disc; the arc channel gradually descends from its junction with the supporting base disc to its endpoint to ensure that the linear isolation grooves pass over the endpoint of the arc channel without interfering with the bearing rollers that are gradually departing from the linear isolation grooves; the width of the receiving transition channel matches the axial length of the bearing rollers, which constrains their posture as they roll through the receiving transition channel to avoid getting stuck; and the receiving transition channel connects to the storage channel of the storage bins or interfaces with the storage channels of the storage bins through the conveying mechanism; the bearing rollers pass through the receiving transition channel or sequentially through the receiving transition channel and the conveying mechanism into the storage channels of the storage bins.

[0058] Furthermore, the feeding device is equipped with a feeding channel; the feeding channel is located in the upper space at the back of the upper grinding disc and communicates with the entrance.

[0059] Furthermore, the operation of the transport robot includes: moving the empty storage bins out of the storage station and ensuring that the channel entrance of the storage bin connects to the receiving transition channel or the conveying mechanism to receive bearing rollers from the receiving mechanism; and when the storage bins are fully loaded with bearing rollers, the transport robot returns the empty storage bins to the storage station for temporary storage; based on decisions made by the controller, the transport robot moves the fully loaded storage bin within the storage station and ensures that the exit of the storage bins connect to the feeding channel to unload the bearing rollers.

[0060] Furthermore, the feeding channel is the curved, zigzag, or twisted combination channel; during the process in which the bearing rollers enter the entrance via the feeding channel, the bearing rollers from the storage bins roll in the feeding channel under their own weight in a single line arrangement, with their axes parallel and rolling surfaces close together, along the curved path, the zigzag path, or the twisted combination path; the width of the feeding channel matches the axial length of the bearing rollers, to constrain the posture of the bearing roller when rolling in the feeding channel and avoid getting stuck.

[0061] Furthermore, the grinding device for the finishing of the rolling surfaces of the bearing rollers, the receiving device is equipped with a receiving buffer station, which has a receiving station and a first buffer station; the receiving buffer station includes a first bracket and a first guide rail; and the first bracket is configured to hold the storage bins, and the first bracket along with the storage bins moves back and forth between the receiving station and the first buffer station along the first guide rail; the transport robot removes the empty storage bins from the storage station and places them on the first bracket located at the first buffer station; the storage bins at the receiving station move along the first guide rail so that the channel entrance aligns with the receiving transition channel or the conveyor mechanism to receive bearing rollers from the receiving mechanism; after being fully loaded, the fully loaded storage bins switch to the first buffer station, while the empty storage bins switch to the receiving station; the transport robot sends one selected fully loaded storage bin located at the first buffer station back to the storage station for temporary storage, and then removes another empty storage bin from the storage station and places it on the first bracket located at the first buffer station, continuously repeating this process.

[0062] Furthermore, the feeding device is equipped with a feeding buffer station, which has a feeding station and a second buffer station, the feeding buffer station includes a second bracket and a second guide rail; and the second bracket is configured to hold the storage bins, and the second bracket along with the storage bins moves back and forth between the feeding station and the second buffer station along the second guide rail; the transport robot removes the fully loaded storage bins selected by the controller from the storage station and places it on the second bracket located at the buffer station; and the storage bins at the feeding station move along the second guide rail so that the channel exit aligns with the feeding channel to unload the bearing rollers; after being emptied, the empty storage bins switch to the buffer station, while the fully loaded storage bins switch to the feeding station; and the transport robot sends one selected empty storage bin located at the second buffer station back to the storage station and then removes another fully loaded storage bin selected by the controller from the storage station and places it on the second bracket located at the buffer station, continuously repeating this process.

[0063] The present disclosure also provides a grinding device for finishing of rolling surfaces of bearing rollers, including a main machine, an external circulation equipment, and the grinding disc assembly for the finishing of rolling surfaces of bearing rollers.

[0064] Furthermore, the main machine includes a rotating component and a loading component; and the rotating component is configured to drive the lower grinding disc to rotate relative to the upper grinding disc, while the loading component is configured to drive the lower grinding disc to approach the upper grinding disc in order to apply grinding load to the bearing rollers distributed in the grinding processing area; and the external circulation equipment includes a receiving mechanism, a lifting mechanism, and the feeding channel; and the feeding channel is located in the upper space on the back of the upper grinding disc and communicates with the entrance.

[0065] Furthermore, the receiving mechanism includes a supporting base and a receiving transition channel; and the supporting base is fixedly connected to the body of the grinding equipment, arranged around the outer edge of the lower grinding disc, and positioned beneath the separating disc; and under the constraint and guidance of the linear isolation grooves and the support of the supporting base, the bearing rollers maintain their posture while leaving the grinding processing area from the exit; and the receiving transition channel includes an arc channel, which is arranged around the outer edge of the lower grinding disc and connects to the supporting base; the arc channel gradually descends from a connection point with the supporting base to its endpoint, ensuring that the linear isolation grooves do not interfere with the bearing rollers that are gradually leaving the constraint of the linear isolation grooves while passing above the endpoint of the arc channel; and the width of the receiving transition channel matches the axial length of the bearing rollers.

[0066] Furthermore, the receiving transition channel connects to the lifting mechanism or interfaces with the lifting mechanism through a conveyor mechanism; the bearing rollers enter the lifting mechanism through the receiving transition channel, or sequentially pass through the receiving transition channel and the conveyor mechanism into the lifting mechanism.

[0067] Furthermore, the lifting mechanism is used to elevate the bearing rollers in a single isolated, single line queue with controlled posture, either connecting with the feeding channel or interfacing with the feeding channel through the conveyor mechanism; the bearing rollers enter the feeding channel via the lifting mechanism or sequentially pass through the lifting mechanism and the conveyor mechanism into the feeding channel.

[0068] Furthermore, the feeding channel is the curved channel, the zigzag channel, or the combined winding channel; during the process of entering the grinding processing area through the entrance via the feeding channel, the bearing rollers from the lifting mechanism or conveyor mechanism roll in a single line queue, with axes parallel and rolling surfaces close to each other, along the curved path, the zigzag path, or the combined winding path, aided by their own weight; and the width of the feeding channel matches the axial length of the bearing rollers, to constrain the posture of the bearing roller when rolling in the feeding channel and avoid getting stuck.

[0069] Furthermore, all the bearing rollers complete the grinding cycle when they 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 occurring between the bearing rollers in the grinding processing area gradually expands to the entire batch of bearing rollers, continuously improving the size consistency of the bearing rollers until the specified technical indicators are met.

[0070] Compared with the prior arts, the beneficial effects of the present disclosure are as follows:

[0071] the grinding disc kit proposed in the embodiments of the present disclosure, the working surface of the lower grinding disc is either a flat surface or a conical surface, while the corresponding working surface of the upper grinding disc is a flat surface, a planar spiral groove, or a conical spiral groove. During the grinding process, the bearing rollers roll between the working surfaces of the lower and upper grinding discs under the frictional drive of the two working surfaces. The rolling surfaces of the bearing rollers engage in differential sliding with the working surfaces of the lower and upper grinding discs, respectively. The rolling of the bearing rollers between the working surfaces of the lower and upper grinding discs includes both the translational motion of the center of mass of the bearing rollers and their rotational motion around their own axes, which naturally overcomes the limitations of the prior arts in ensuring the continuous and stable rotation of the bearing rollers.BRIEF DESCRIPTION OF THE DRAWINGS

[0072] FIG. 1 is a schematic structural diagram of a cylindrical roller according to an embodiment of the present disclosure.

[0073] FIG. 2 is a schematic structural diagram of a conical roller according to an embodiment of the present disclosure.

[0074] FIG. 3 is a schematic structural diagram of a needle roller according to an embodiment of the present disclosure.

[0075] FIG. 4 is a schematic structural diagram of a grinding disc assembly of configuration one according to an embodiment of the present disclosure.

[0076] FIG. 5 is a schematic structural diagram of a base plane of the lower grinding disc according to an embodiment of the present disclosure.

[0077] FIG. 6 is a schematic structural diagram of a base plane of the upper grinding disc according to an embodiment of the present disclosure.

[0078] FIG. 7 is a schematic structural diagram of a grinding disc assembly of configuration two according to an embodiment of the present disclosure.

[0079] FIG. 8 is a schematic structural diagram of a lower grinding disc base conical surface according to an embodiment of the present disclosure.

[0080] FIG. 9 is a schematic structural diagram of an upper grinding disc base conical surface according to an embodiment of the present disclosure.

[0081] FIG. 10 is a schematic structural diagram of a grinding disc assembly of configuration three according to an embodiment of the present disclosure.

[0082] FIG. 11 is a schematic structural diagram of a storage bin with storage channels in horizontally and inclined arrangement according to an embodiment of the present disclosure.

[0083] FIG. 12 is a work schematic structural diagram of a storage station, a material receiving device and a feeding device with storage channels of the storage bin in horizontally and inclined arrangement according to an embodiment of the present disclosure.

[0084] FIG. 13 is a schematic structural diagram of a material receiving mechanism according to an embodiment of the present disclosure.

[0085] FIG. 14 is a schematic structural diagram showing the conical rollers enter a grinding processing area through a feeding channel according to an embodiment of the present disclosure.

[0086] FIG. 15 is a schematic structural diagram of a storage bin with the storage channels in vertical arrangement according to an embodiment of the present disclosure.

[0087] FIG. 16 is a schematic structural diagram of a storage station with the storage channels of the storage bin in vertical arrangement according to an embodiment of the present disclosure.

[0088] FIG. 17 is a schematic structural diagram of a receiving buffer station according to an embodiment of the present disclosure.

[0089] FIG. 18 is a schematic structural diagram of a feeding buffer station according to an embodiment of the present disclosure.LABELS AND DESCRIPTION110 cylindrical roller, 12 conical roller, 14 axis of a conical roller, 15 rolling surface of the bearing roller, 16 large end surface of the conical roller, 17 end surface of the cylindrical roller; and

[0091] 2 lower grinding disc, 21 front surface of the lower grinding disc, 22 axis of the lower grinding disc, 23 base plane of the lower grinding disc, 24 lower grinding disc base conical surface, 25 axial section,26 intersection line, 27 separating disc, 28 linear isolation groove, 29 isolation groove baseline; and

[0092] 3 upper grinding disc, 31 upper grinding disc front surface, 32 axis of the upper grinding disc, 33 planar spiral groove, 34 conical spiral groove, 35 conical spiral groove baseline, 36 upper grinding disc base plane, 37 upper grinding disc base conical surface; and 41 entrance, 42 exit; and

[0093] 5 external circulation equipment; and

[0094] 61 storage bin, 62 exit gate, 63 storage channel, 64 transport robot; and

[0095] 72 supporting base disc, 74 conveyor, 75 receiving transition channel, 76 arc channel, 78 front station receiving mechanism, 79 front station transition mechanism; and

[0096] 91 first bracket, 91′ second bracket, 92 first guide rail, 92′ second guide rail; and

[0097] P refers to geometric center, e refers to eccentric distance, 2φ refers to cone angle of the conical roller.DETAILED DESCRIPTION OF THE EMBODIMENTS

[0098] The following provides a more detailed description of the present invention in conjunction with the accompanying drawings. The embodiments described with reference to the accompanying drawings are exemplary and intended to illustrate the invention, not to be construed as limitations thereof. Furthermore, the dimensions, materials, shapes, and relative arrangements of the constituent parts described in the following embodiments are not intended to limit the scope of the present invention unless specifically stated otherwise.

[0099] The bearing rollers of the present disclosure refer to the bearing rollers that are processed, which are cylindrical rollers 11 or conical rollers 12, with needle rollers classified as the cylindrical rollers 11. FIG. 1 is a schematic structural diagram of a cylindrical roller according to an embodiment of the present disclosure. The surfaces of the cylindrical rollers are defined to includes rolling surfaces 15 and end surfaces 17 of the cylindrical rollers 11. FIG. 2 is a schematic structural diagram of a conical roller according to an embodiment of the present disclosure. The surfaces of the conical rollers are defined to includes the rolling surfaces 15 and large end surfaces 16 of the conical rollers 12, with a cone angle of the conical rollers 12 is denoted as 2φ. FIG. 3 is a schematic structural diagram of a needle roller according to an embodiment of the present disclosure. As shown in FIGS. 1-3, a nominal diameter of the bearing rollers is D.

[0100] The conveying mechanism described in this disclosure is configured to transport the bearing rollers in a single line queue with controlled posture from one location to another. The conveying mechanism can be a flat belt conveyor, a double round belt conveyor, or any other conveying mechanism known in the art, or it may be a conveying mechanism developed in the future for the purpose of this disclosure. This disclosure does not impose specific structural limitations on the conveying mechanism.

[0101] The lifting mechanism described in this disclosure is used to elevate the bearing rollers in an isolated and single line queue with controlled posture from a lower position to a higher position. This lifting mechanism can be a push disc lifting mechanism, a chain disc lifting mechanism, or any other lifting mechanism known in the art, or it may be a lifting mechanism developed in the future for the purpose of this disclosure. This disclosure does not impose specific structural limitations on the lifting mechanism.

[0102] An embodiment of a grinding disc assembly, the grinding disc assembly for a finishing of rolling surfaces of bearing rollers.

[0103] The grinding disc assembly includes a lower grinding disc 2, an upper grinding disc 3, and a separating disc 27.

[0104] A front surface 21 of the lower grinding disc is arranged opposite a front surface 31 of the upper grinding disc, with the separating disc 27 positioned in a gap between the front surface 21 of the lower grinding disc and the front surface 31 of the upper grinding disc.

[0105] The grinding disc assembly has the following three configurations.

[0106] Configuration one: as shown in FIG. 4, the front surface 21 of the lower grinding disc is a working surface of the lower grinding disc, which is flat. The front surface 31 of the upper grinding disc is equipped with a planar spiral groove 33, and a surface of the planar spiral groove 33 is a working surface of the upper grinding disc, and an axis of the planar spiral groove 33 aligns with an axis 32 of the upper grinding disc. The separating disc 27 is a flat disc that features linear isolation grooves 28 arranged in a flat radial and a circumferential array, with the axes of the linear isolation grooves array being the axis of the separating disc 27. The upper grinding disc 3 is coaxial with the separating disc 27, and the axis 32 of the upper grinding disc and the axis of the separating disc 27 are perpendicular to the working surface of the lower grinding disc.

[0107] An area enclosed by the working surface of the lower grinding disc and the working surface of the upper grinding disc is defined as a grinding processing zone. An entrance 41 for the bearing rollers to enter the grinding processing zone is located at one end of the planar spiral groove 33, near an inner edge of the upper grinding disc 3, and leads to a back of the upper grinding disc 3. Another end of the planar spiral groove 33, adjacent to an outer edge of the upper grinding disc 3, serves as an exit 42 for the bearing rollers to leave the grinding processing zone. The linear isolation grooves 28 extend from the entrance 41 outward beyond an outer edge of the lower grinding disc 2, and a width of the linear isolation grooves 28 is matched to a radial size of the bearing rollers. So that the bearing rollers can slide along the linear isolation groove 28. The bearing rollers shown in FIG. 4 are conical rollers 12.

[0108] During a grinding process, the bearing rollers within the grinding processing zone are spaced apart by the separating disc 27 and distributed discretely along the planar spiral groove 33 of the front surface 31 of the upper grinding disc. The lower grinding disc 2 and the upper grinding disc 3 approach each other to apply grinding loads to the bearing rollers distributed within the grinding processing zone, resulting in a line contact between the bearing rollers and the working surfaces of the lower grinding discs and the upper grinding discs, respectively. The lower grinding disc 2 and the upper grinding disc 3 rotate relative to each other around the axis of the separating disc 27, causing the bearing rollers to continuously roll between the working surfaces of the lower grinding discs and upper grinding discs under friction drive from both surfaces. Simultaneously, the bearing rollers move from the entrance 41 to the exit 42 along the planar spiral groove 33 and the linear isolation grooves 28, respectively, with the surfaces of the cylindrical rollers or the conical rollers continuously tangent to the working surface of the upper grinding disc. The rolling surfaces 15 of the bearing rollers experience differential sliding against the working surfaces of the lower grinding discs and the upper grinding discs, thus achieving a grinding process of the rolling surfaces 15.

[0109] During the grinding process, the separating disc 27 rotates around its own axis to drive the bearing rollers to revolve around the axis of the separating disc 27. Alternatively, the separating disc 27 is driven to rotate around its own axis by the bearing rollers within the grinding processing zone.

[0110] When the bearing rollers are placed as a reference on the working surface of the lower grinding disc and maintain a contact state during the grinding process. As shown in FIG. 5, a geometric center P of the bearing rollers on the working surface of the lower grinding disc lies on a plane parallel to the working surface of the lower grinding disc, referred to as a base plane of the lower grinding disc 23. When the bearing rollers are cylindrical rollers 11, axes 14 of the cylindrical rollers 11 are located on the base plane 23 of the lower grinding disc. When the bearing rollers are the conical rollers 12, axes 14 of the conical rollers 12 intersect the base plane 23 of the lower grinding disc at an angle φ, which is half of the cone angle of the conical rollers 12. The bearing rollers shown in FIG. 5 are cylindrical rollers 11.

[0111] When the bearing rollers are placed as a reference within the planar spiral groove 33 and maintains the contact state during the grinding process, the geometric center of the bearing rollers within the planar spiral groove 33 lies on a helical line, which is referred to as a groove baseline 35. As shown in FIG. 6, the groove baseline 35 lies on an upper grinding disc base plane 36. During the grinding process, the upper grinding disc base plane 36 coincides with the base plane of the lower grinding disc 23. The bearing rollers shown in FIG. 6 are conical rollers 12.

[0112] According to the definition of conjugate surfaces, “a pair of surfaces on two components of a mechanism that are continuously tangent to achieve a given motion law is a pair of conjugate surfaces”. The working surface of the upper grinding disc is a pair of conjugate surfaces with the surfaces of the bearing rollers, a planar helical movement of the bearing rollers around the axis 32 of the upper grinding disc represents a conjugate motion between the upper grinding disc 3 and the bearing rollers.

[0113] Given the conjugate motion and one surface of the conjugate surfaces, solving for the other surface is a fundamental problem in the principle of conjugate surfaces. In this embodiment, the conjugate motion of the upper grinding disc 3 and the bearing rollers, as well as the surface of the bearing rollers, are known, based on the principle of conjugate surfaces, the surface of the planar spiral groove 33 can be solved.

[0114] Configuration two: as shown in FIG. 7, the front surface 21 of the lower grinding disc is the working surface of the lower grinding disc, which is a conical surface with an axis of the conical surface being the axis 22 of the lower grinding disc. The front surface 31 of the upper grinding disc features conical spiral grooves 34, with a groove surface of the conical spiral grooves 34 being the working surface of the upper grinding disc, and an axis of each conical spiral groove 34 aligning with the axis 32 of the upper grinding disc. The separating disc 27 is a conical disc, which has linear isolation grooves 28 arranged in a conical radial and circumferential array, with axis of the linear isolation grooves array being the axis of the separating disc 27. The lower grinding disc 2, the upper grinding disc 3, and the separating disc 27 are coaxial.

[0115] The area enclosed by the working surfaces of the lower and upper grinding discs forms the grinding processing zone; the entrance 41 for the bearing rollers to enter the grinding processing zone is located at one end of the conical spiral grooves 34 adjacent to the inner edge of the upper grinding disc 3, leading to the back of the upper grinding disc 3. Another end of the conical spiral grooves 34 adjacent to the outer edge of the upper grinding disc 3 serves as the exit 42 for the bearing rollers leaving the grinding processing zone. The linear isolation grooves 28 extend from the entrance 41 to beyond the outer edge of the upper grinding disc 3, with the width of the linear isolation grooves 28 matching the radial dimensions of the bearing rollers. So that the bearing rollers can slide along the linear isolation grooves 28. The bearing rollers shown in FIG. 7 are cylindrical rollers 11.

[0116] During the grinding process, the bearing rollers in the grinding processing zone are separated by the separating disc 27 and distributed discretely within the linear isolation grooves 28 along the conical spiral grooves 34 of the upper grinding disc front surface 31. The lower grinding disc 2 and the upper grinding disc 3 move closer to apply grinding loads on the bearing rollers distributed in the grinding processing zone, resulting in line contact between the bearing rollers and both the working surfaces of the lower grinding disc and upper grinding disc. The lower grinding disc 2 and the upper grinding disc 3 rotate relative to each other around the axis of the separating disc 27, causing the bearing rollers to roll continuously between the working surfaces of the lower grinding disc and upper grinding disc under the friction drive from those working surfaces. At the same time, the bearing rollers move from the entrance 41 to the exit 42 along the conical spiral grooves 34 and the linear isolation grooves 28, with either the surfaces of the cylindrical rollers or the surfaces of the conical rollers continuously tangent to the working surface of the upper grinding disc. The rolling surfaces 15 of the bearing rollers engage in differential sliding with the working surfaces of both the lower grinding disc and the upper grinding disc, achieving the grinding process of the rolling surfaces 15.

[0117] During the grinding process, the separating disc 27 rotates around its own axis, propelling the bearing rollers to revolve around the axis of the separating disc 27. Alternatively, the separating disc 27 is rotated around its own axis by the bearing rollers within the grinding processing zone.

[0118] When the bearing roller is positioned as a reference on the working surface of the lower grinding disc and maintains the contact state of the grinding process, the geometric center of the bearing rollers on the working surface of the lower grinding disc lies on the conical surface that is coaxial with the working surface of the lower grinding disc and has a same conical angle. The conical surface is referred to the lower grinding disc base conical surface 24. When the bearing rollers are the cylindrical rollers 11, the axis 14 of the cylindrical rollers lies on the lower grinding disc base conical surface 24. When the bearing rollers are the conical rollers 12, the axis 14 of the conical rollers lies within an axial section 25 of the lower grinding disc base conical surface 24, intersecting with an intersection line 26 of the axial section of the lower grinding disc base conical surface 24 at the angle φ, which is half of the conical angle of the conical rollers 12. The bearing rollers shown in FIG. 8 are conical rollers 12.

[0119] When the bearing roller is placed as a reference within the conical spiral grooves 34 and maintains the contact state of the grinding process, the geometric center of the bearing roller in the conical spiral grooves 34 lies on the helical line, referred to as the conical spiral groove baseline 35. As shown in FIG. 9, The conical spiral groove baseline 35 lies on the conical surface, referred to as a upper grinding disc base conical surface 37. During grinding, the upper grinding disc base conical surface 37 coincides with the lower grinding disc base conical surface 24.

[0120] According to the definition of conjugate surfaces, “a pair of surfaces on two components of a mechanism that are continuously tangent to achieve a given motion law is a pair of conjugate surfaces”. The working surface of the upper grinding disc is a pair of conjugate surfaces with the surfaces of the bearing rollers, a planar helical movement of the bearing rollers around the axis 32 of the upper grinding disc represents a conjugate motion between the upper grinding disc 3 and the bearing rollers.

[0121] Given the conjugate motion and one surface of the conjugate surfaces, solving for the other surface is a fundamental problem in the principle of conjugate surfaces. In this embodiment, the conjugate motion of the upper grinding disc 3 and the bearing rollers, as well as the surface of the bearing rollers, are known, based on the principle of conjugate surfaces, the surface of the conical spiral grooves 34 can be solved.

[0122] Configuration three: as shown in FIG. 10, the configuration three is only applicable for the finishing of the rolling surfaces 15 of cylindrical rollers. The front face 21 of the lower grinding disc is the working surface of the lower grinding disc, which is flat. The front face 31 of the upper grinding disc is the working surface of the upper grinding disc, which is also flat. The separating disc 27 is a flat disc that features linear isolation grooves 28 arranged in a radial and circumferential array, with the axis of the array of linear isolation grooves aligned with the axis of the separating disc 27. The working surface of the upper grinding disc is parallel to that of the lower grinding disc, and the axis of the separating disc 27 is perpendicular to both the working surfaces of the upper grinding disc and lower grinding disc.

[0123] The area enclosed by the working surfaces of the lower grinding disc and the upper grinding disc forms the grinding processing area. The entrance 41 for the cylindrical roller 11 to enter the grinding processing area is located at the inner edge of the upper grinding disc 3 and leads from the working surface of the upper grinding disc to its back. The exit 42 for the cylindrical roller 11 to leave the grinding processing area is at the outer edge of the upper grinding disc 3. The linear isolation grooves 28 extend from the entrance 41 beyond the outer edge of the lower grinding disc 2, and the width of the linear isolation groove 28 matches the radial size of the cylindrical rollers. So that the bearing rollers can slide along the linear isolation groove 28.

[0124] During the grinding process, the cylindrical rollers 11 in the grinding processing area is separated by the separating disc 27 within each linear isolation groove 28. The lower grinding disc 2 and the upper grinding disc 3 approach each other to apply a grinding load to the cylindrical roller 11 distributed within the grinding processing area, resulting in line contact between the rolling surface 15 of the cylindrical roller and the working surfaces of both the lower and upper grinding discs. The lower grinding disc 2 and the upper grinding disc 3 rotate relative to each other around the axis of the separating disc 27. The cylindrical rollers 11 roll continuously between the working surfaces of the lower grinding disc and upper grinding disc, driven by friction, while simultaneously moving from the entrance 41 to the exit 42 along the linear isolation grooves 28. The rolling surfaces 15 of the cylindrical rollers experience differential sliding with both the working surfaces of the lower grinding disc and the upper grinding disc, achieving the grinding process of the rolling surfaces 15.

[0125] During the grinding process, the separating disc 27 rotates around its own axis, propelling the bearing rollers to revolve around the axis of the separating disc 27. Alternatively, the separating disc 27 is driven to rotate around its own axis by the cylindrical rollers 11 within the grinding processing area.

[0126] When the cylindrical roller is used as a reference and is placed within the grinding disc assembly while maintaining contact with the lower grinding disc 2 and the upper grinding disc 3 during the grinding process, the geometric center of the cylindrical roller 11 within the same linear isolation groove 28 lie along a same line, referred to as a isolation groove baseline 29. The isolation groove baseline 29 intersects perpendicularly with the axis of the separating disc 27 and has an eccentric distance. The axis 14 of the cylindrical rollers lies on the isolation groove baseline 29.

[0127] During the grinding process, the bearing rollers, which are distributed discretely in the grinding processing area, coordinate to bear the grinding load. The bearing rollers, relying on the working surfaces of the lower and upper grinding discs, undergo a selective material removal effect. The larger diameter bearing rollers bear a greater grinding load and have more material removed, while the smaller diameter bearing rollers bear a smaller grinding load and have less material removed.

[0128] First embodiment of the grinding device: a grinding device for a finishing of rolling surfaces of bearing rollers.

[0129] The grinding device for a finishing of rolling surfaces of bearing rollers, including a main machine, an external circulation equipment 5, and the grinding disc assembly for the finishing of rolling surfaces of bearing rollers.

[0130] The main machine includes a rotary component and a loading component.

[0131] The rotary component is configured to drive the lower grinding disc 2 to rotate relative to the upper grinding disc 3, and the loading component is configured to drive the lower grinding disc 2 to approach the upper grinding disc 3 in order to apply the grinding load to the bearing rollers distributed within the grinding processing area.

[0132] When the separating disc 27 rotates around its own axis to drive the bearing rollers to revolve around the axis of the separating disc 27, the main machine also includes an separating disc rotation component that drives the rotation of the separating disc 27.

[0133] The external circulation equipment 5 includes a material receiving device, a feeding device, a storage station, and a plurality of storage bins 61, and a controller.

[0134] The storage station is configured to store the storage bins 61; the storage bins 61 are configured to temporarily hold the bearing rollers. Each storage bin 61 includes one or more storage channels 63, the bearing rollers are stored in a single line queue, with axes parallel to each other and rolling surfaces 15 in close proximity to each other, to reduce mutual collisions between the bearing rollers and avoid impact damage; the storage channel 63 runs vertically from the channel entrance to the channel exit. The storage bins 61 serve as a hardware basis for adjusting order and position of the bearing rollers in a bearing roller queue under conditions where there is no physical contact between the bearing rollers loaded into different storage bins 61. The bearing roller queue includes a closed-loop queue of all bearing rollers located within the grinding processing area and the external circulation equipment 5.

[0135] As shown in FIG. 11, storage space of the storage bins 61 is divided into multiple parallel storage channels 63, which are arranged at an inclination relative to the horizontal plane. A width of each storage channel 63 matches an axial length of the bearing rollers. An upper end of each storage channel 63 is the entrance, and a lower end of each storage channel 63 is the exit, equipped with an exit gate 62. The bearing rollers are sequentially stored in the storage channels 63 in the single line queue, with their axes parallel to each other and the rolling surfaces 15 closely adjacent to the rolling surfaces 15. The exit gate 62 is in an open state when the bearing rollers are unloaded from the storage channels 63.

[0136] As shown in FIG. 12, the storage bins 61 are installed in layers within the storage station.

[0137] The receiving device includes a receiving mechanism, a front station receiving mechanism 78, and a front station transition mechanism 79.

[0138] Both of the front station receiving mechanism 78 and the front station transition mechanism 79 are equipped with the storage channels 63 consistent with those in the storage bins 61.

[0139] The receiving mechanism includes a support base disc 72 and a receiving transition channel 75. The support base disc 72 is fixedly connected to a bed of the grinding device, arranged around the outer edge of the lower grinding disc 2, and positioned below the separating disc 27. Under a constraint guidance of the linear isolation grooves 28 and a support of the support base disc 72, the bearing rollers maintain their posture as they leave the grinding processing area from the exit 42. The receiving transition channel 75 includes an arc channel 76, which is arranged around the outer edge of the lower grinding disc 2 and connects to the support base disc 72. The arc channel 76 gradually descends from the connection point with the support base disc 72 to its endpoint, ensuring that the linear isolation grooves 28 passes above the endpoint of the arc channel 76 without interfering with the bearing rollers that are gradually disengaging from the constraint guidance of the linear isolation grooves 28. A width of the receiving transition channel 75 matches the axial length of the bearing rollers; the receiving transition channel 75 connects to the storage channels 63 of the front station receiving mechanism 78 or connects to the storage channels 63 of the front station receiving mechanism 78 through a conveyor mechanism. The bearing rollers enter the storage channels 63 of the front station receiving mechanism 78 via the receiving transition channel 75, or they sequentially pass through the receiving transition channel 75 and the conveyor mechanism to enter the storage channels 63 of the front station receiving mechanism 78.

[0140] FIG. 13 is a schematic structure diagram of the receiving mechanism, where the working surface of the lower grinding disc is flat, and the working surface of the upper grinding disc is the groove surface of the planar spiral groove 33. The figure also shows a docking relationship between the receiving transition channel 75 and the conveyor belt 74, where the bearing rollers enter the conveyor belt 74 through the receiving transition channel 75. The method by which the bearing rollers enter the storage channel 63 of the front station receiving mechanism 78 from the conveying mechanism is not the focus of this embodiment. Skilled personal in the field can design various technical solutions to address this based on existing technologies and simple combinations of existing techniques, and this embodiment does not restrict these technical solutions and their implementation structures.

[0141] As shown in FIG. 12, the channel entrance of multiple storage channels in the front station receiving mechanism 78 sequentially docks with the receiving transition channel 75 or the conveying mechanism to receive the bearing rollers from the receiving mechanism. The front station receiving mechanism 78 in the FIG. 12 is currently receiving the cone rollers 12 from the receiving mechanism.

[0142] When the front station receiving mechanism 78 is fully loaded with bearing rollers, a channel entrance of the front station transition mechanism 79 connects to a channel exit of the front station receiving mechanism 78, allowing all bearing rollers within the front station receiving mechanism 78 to be transferred in a rolling manner to the storage channels 63 of the front station transition mechanism 79. The channel exit of the fully loaded front station transition mechanism 79 connects to the channel entrance of the empty storage bins 61 within the storage station, allowing all bearing rollers within the front station transition mechanism 79 to be loaded into the storage channels 63 of the storage bins 61 in the rolling manner. The front station transition mechanism 79 in the FIG. 12 is currently loading the cone rollers 12 into the storage bin 61.

[0143] The material receiving device is configured to load the bearing rollers leaving the exit 42 of the grinding processing area into empty storage bins 61 in way of the bearing roller queue being processed and a posture being controlled, and avoid the bearing rollers from being damaged by mutual collision.

[0144] The feeding device includes a rear station transition mechanism 81, a rear station feeding mechanism 82, and a feeding channel 83.

[0145] Both the rear station transition mechanism 81 and the rear station feeding mechanism 82 are equipped with the storage channels 63 consistent with those in the storage bin 61; the feeding channel 83 is positioned in upper space at the back of the upper grinding disc 3 and communicates with the entrance 41, as shown in FIG. 14.

[0146] Based on the decision of the controller, as shown in FIG. 12, the channel entrance of the rear station transition mechanism 81 connects to the channel exit of the selected storage bin 61 in the storage station, unloading all the bearing rollers in the storage bin 61 in a rolling manner to the storage channel 63 of the rear station transition mechanism 81, the rear station transition mechanism 81 in this figure is currently unloading the cone rollers 12 from the storage bins 61, thereby emptying the storage channel 63 of the storage bins 61. The channel exit of the fully loaded rear station transition mechanism 81 connects to the channel entrance of the rear station feeding mechanism 82, allowing the bearing rollers within the rear station transition mechanism 81 to be transferred in a rolling manner to the storage channel 63 of the rear station feeding mechanism 82. The channel exits of multiple storage channels in the rear station feeding mechanism 82 sequentially connect to the feeding channel 83 or sequentially connect to the feeding channel 83 through the feeding transition channel 84 to send the bearing rollers into the entrance 41 through the feeding channel 83, the rear station feeding mechanism 82 in this figure is sequentially docking with the feeding channel 83 through the feeding transition channel 84.

[0147] The feeding channel 83 is a curved channel, a zigzag channel, or a winding combination channel. During a process of entering the entrance 41 via the feeding channel 83, the bearing rollers from the rear station feeding mechanism 82 roll down in a single line queue, with their axes parallel to each other and their rolling surfaces 15 closely adjacent to the rolling surfaces 15 along a curved path, a zigzag path, or a twisted combination path, assisted by their own weight. A width of the feeding channel 83 matches the axial length of the bearing rollers, to constrain the orientation of the bearing rollers while rolling in the feeding channel 83 and prevent them from getting jammed. The length of the feeding channel 83 is sufficient to accommodate dozens of bearing rollers.

[0148] The bearing rollers in the same storage channel 63 enter the storage channel 63 and exit in a first-in, first-out sequence.

[0149] The controller is configured to decide when to unload the bearing rollers from which of the storage bins 61; the controller serves as a software basis for adjusting the order and position of the bearing rollers in the bearing roller queue under conditions where there is no physical contact between the bearing rollers loaded into different storage bins 61.

[0150] During the grinding process, the bearing rollers that have completed a grinding operation leave the grinding processing area from the exit 42, the bearing rollers leaving the grinding processing area are temporarily stored in the empty storage bins 61 and placed in the storage station. Based on the decisions of the controller, the bearing rollers are unloaded from the selected storage bin 61 and sent from the entrance 41 into the grinding processing area to continue receiving grinding. The order and position of the bearing rollers entering the grinding processing area are updated according to the decisions of the controller, thus achieving a block mixing and swapping of the bearing rollers without physical contact between the bearing rollers loaded into different storage bins 61.

[0151] An entire process of the bearing rollers constitutes one grinding cycle, includes entering into the grinding processing area from the entrance 41, undergoing grinding within the grinding processing area, and exiting the grinding processing area from the exit 42.

[0152] The changes in the order and position of the bearing rollers leaving the grinding processing area from the exit 42 that occur within the external circulation equipment 5 modify the combination of the bearing rollers entering the grinding processing area subsequently, thereby extending a material selective removal effect occurring among the bearing rollers in the grinding processing area to an entire batch of bearing rollers. With an increase in grinding cycles, and a size consistency of the bearing rollers improves continuously until specified technical indicators are reached.

[0153] In order to improve the size consistency of the bearing rollers, it is necessary to establish a feeding sequence rule for loading the bearing rollers into the entrance 41 and to plan the timing for unloading the bearing rollers from each storage bin 61 during the grinding process according to this feeding sequence rule. The feeding sequence rule can ensure that all bearing rollers undergo a similar number of grinding cycles, while also weakening the sequence and positional characteristics of the bearing rollers in the bearing roller queue during mutual comparison in the grinding processing area.

[0154] On one hand, the external circulation equipment 5 is configured to manage the grinding processing of large batches of the bearing rollers exceeding a capacity of the grinding processing area; and on the other hand, to establish a logistics channel for the bearing rollers between the exit 42 and the entrance 41. The external circulation equipment 5 is also configured for mixing and location exchanging the bearing rollers, This will help to diminish the sequence and positional characteristics of the bearing rollers in the bearing roller queue.

[0155] During the transport process of the bearing rollers moving from the exit 42 to the inlet 41 via the external circulation device 5, breaking the fixed and unchanging feeding sequence according to a specific rule is beneficial to overcome the issue where bearing rollers that are far apart in the bearing roller queue cannot be compared with each other in the grinding processing area.

[0156] During the transport process of the external circulation device 5, the bearing rollers are orderly temporarily stored in the storage bin 61 and are then unloaded in a planned sequence from the selected storage bin 61 to be loaded into the entrance 41. This effectively prevents surface damage caused by collisions between the bearing rollers.

[0157] Second embodiment of the grinding device: a grinding device for a finishing of rolling surfaces of bearing rollers.

[0158] The main differences between the grinding equipment of the second embodiment and the grinding equipment described in the first embodiment are as following.

[0159] Each storage bin 61 has a storage space composed of one or more vertically arranged parallel storage channels 63. The storage channels 63 are the curved path, the zigzag path, or have the twisted combination path. The storage space of the storage bin 61 shown in FIG, 5 has three storage channels 63. During a process of depositing into or unloading from the storage bins 61, the bearing rollers roll in the storage channel 63 from top to bottom under their own weight, maintaining a single line alignment with their axes parallel and their rolling surfaces 15 close to each other along the curved path, the zigzag path, or the twisted path. The width of the storage channel 63 matches the axial length of the bearing rollers. The upper end of the storage channel 63 serves as the channel entrance, while the lower end serves as the channel exit and is equipped with an outlet gate 62. The bearing rollers are stored in the storage channel 63 in a single line arrangement, with their axes parallel and rolling surfaces 15 close together, in an upward sequence. The outlet gate 62 is in the open state when the bearing rollers are unloaded from the storage channel 63.

[0160] As shown in FIG. 16, the storage station is equipped with a transport robot 64 for moving the storage bins 61.

[0161] The receiving device is equipped with a receiving mechanism that shown in the first embodiment.

[0162] The receiving transition channel 75 connects to the storage channels 63 of the front station receiving mechanism 78 or connects to the storage channels 63 of the front station receiving mechanism 78 through a conveyor mechanism. The bearing rollers enter the storage channels 63 of the storage bins 61 through the receiving transition channel 75, or they sequentially pass through the receiving transition channel 75 and the conveying mechanism to enter the storage channels 63 of the storage bins 61.

[0163] The transport robot 64 is configured to move the empty storage bins 61 out of the storage station and ensuring that the channel entrance of the storage bin 61 connects to the receiving transition channel 75 or the conveying mechanism to receive bearing rollers from the receiving mechanism. When the storage bins 61 are fully loaded with bearing rollers, the transport robot 64 returns the empty storage bins 61 to the storage station for temporary storage.

[0164] The feeding device is equipped with a feeding channel 83 that shown in the first embodiment.

[0165] Based on decisions made by the controller, the transport robot 64 moves the fully loaded storage bin 61 within the storage station and ensures that the exit of the storage bins 61 connect to the feeding channel 83 to unload the bearing rollers.

[0166] As shown in FIG. 17, the receiving device is equipped with a receiving buffer station, which has a receiving station and a first buffer station. The receiving buffer station includes a first bracket 91 and a first guide rail 92. The first bracket 91 is configured to hold the storage bins 61, and the first bracket 91 along with the storage bins 61 moves back and forth between the receiving station and the first buffer station along the first guide rail 92. The transport robot 64 removes the empty storage bins 61 from the storage station and places them on the first bracket 91 located at the first buffer station; the storage bins 61 at the receiving station move along the first guide rail 92 so that the channel entrance aligns with the receiving transition channel 75 or the conveyor mechanism to receive bearing rollers from the receiving mechanism. After being fully loaded, the fully loaded storage bins 61 switch to the first buffer station, while the empty storage bins 61 switch to the receiving station. The transport robot 64 sends one selected fully loaded storage bin 61 located at the first buffer station back to the storage station for temporary storage, and then removes another empty storage bin 61 from the storage station and places it on the first bracket 91 located at the first buffer station, continuously repeating this process.

[0167] As shown in FIG. 18, the feeding device is equipped with a feeding buffer station, which has a feeding station and a second buffer station, the feeding buffer station includes a second bracket 91′ and a second guide rail 92′. The second bracket 91′ is configured to hold the storage bins 61, and the second bracket 91′ along with the storage bins 61 moves back and forth between the feeding station and the second buffer station along the second guide rail 92′. The transport robot 64 removes the fully loaded storage bins 61 selected by the controller from the storage station and places it on the second bracket 91′ located at the buffer station. The storage bins 61 at the feeding station move along the second guide rail 92′ so that the channel exit aligns with the feeding channel 83 to unload the bearing rollers. After being emptied, the empty storage bins 61 switch to the buffer station, while the fully loaded storage bins 61 switch to the feeding station. The transport robot 64 sends one selected empty storage bin 61 located at the second buffer station back to the storage station and then removes another fully loaded storage bin 61 selected by the controller from the storage station and places it on the second bracket 91′ located at the buffer station, continuously repeating this process.

[0168] Third embodiment of the grinding device: a grinding device for a finishing of rolling surfaces of bearing rollers.

[0169] The grinding device including a main machine, an external circulation equipment 5, and the grinding disc assembly for the finishing of rolling surfaces of bearing rollers.

[0170] The main machine includes a rotating component and a loading component.

[0171] The rotating component is configured to drive the lower grinding disc 2 to rotate relative to the upper grinding disc 3, while the loading component is configured to drive the lower grinding disc 2 to approach the upper grinding disc 3 in order to apply grinding load to the bearing rollers distributed in the grinding processing area.

[0172] The external circulation equipment 5 includes a receiving mechanism, a lifting mechanism, and the feeding channel 83 The feeding channel 83 is located in the upper space on the back of the upper grinding disc 3 and communicates with the entrance 41, as shown in FIG. 14.

[0173] The receiving mechanism includes a supporting base 72 and a receiving transition channel 75; and the supporting base 72 is fixedly connected to the body of the grinding equipment, arranged around the outer edge of the lower grinding disc 2, and positioned beneath the separating disc 27. Under the constraint and guidance of the linear isolation grooves 28 and the support of the supporting base 72, the bearing rollers maintain their posture while leaving the grinding processing area from the exit 42; and the receiving transition channel 75 includes an arc channel 76, which is arranged around the outer edge of the lower grinding disc 2 and connects to the supporting base 72. The arc channel 76 gradually descends from a connection point with the supporting base 72 to its endpoint, ensuring that the linear isolation grooves 28 do not interfere with the bearing rollers that are gradually leaving the constraint of the linear isolation grooves 28 while passing above the endpoint of the arc channel 76. The width of the receiving transition channel 75 matches the axial length of the bearing rollers, to constrain the posture of the bearing roller when rolling along the receiving transition channel 75 to avoid getting stuck.

[0174] The receiving transition channel 75 connects to the lifting mechanism or interfaces with the lifting mechanism through a conveyor mechanism; the bearing rollers enter the lifting mechanism through the receiving transition channel 75, or sequentially pass through the receiving transition channel 75 and the conveyor mechanism into the lifting mechanism. FIG. 13 is a schematic structure diagram of the receiving mechanism, the working surface of the lower grinding disc shown in the figure is flat, while the working surface of the upper grinding disc is the surface of the planar spiral groove 33. FIG. 13 also illustrates the docking relationship between the receiving transition channel 75 and the conveyor belt 74, where the bearing rollers enter the conveyor belt 74 through the receiving transition channel 75.

[0175] The lifting mechanism is used to elevate the bearing rollers in a single isolated, single line queue with controlled posture, either connecting with the feeding channel 83 or interfacing with the feeding channel 83 through the conveyor mechanism. The bearing rollers enter the feeding channel 83 via the lifting mechanism or sequentially pass through the lifting mechanism and the conveyor mechanism into the feeding channel 83.

[0176] The feeding channel 83 is the curved channel, the zigzag channel, or the combined winding channel. During the process of entering the grinding processing area through the entrance 41 via the feeding channel 83, the bearing rollers from the lifting mechanism or conveyor mechanism roll in a single line queue, with axes parallel and rolling surfaces 15 close to each other, along the curved path, the zigzag path, or the combined winding path, aided by their own weight;. The width of the feeding channel 83 matches the axial length of the bearing rollers. To constrain the posture of the bearing rollers while rolling in the feed channel 83 to avoid jamming. The length of the feed channel 83 is sufficient to accommodate dozens of bearing rollers.

[0177] All the bearing rollers complete the grinding cycle when they enter the grinding processing area from the entrance 41, undergo grinding in the grinding processing area, and leave the grinding processing area from the exit 42; as the number of grinding cycles increases, the selective material removal effect occurring between the bearing rollers in the grinding processing area gradually expands to the entire batch of bearing rollers, continuously improving the size consistency of the bearing rollers until the specified technical indicators are met.

Claims

1. A grinding disc assembly for a finishing of rolling surfaces of bearing rollers, wherein, comprising a lower grinding disc (2), an upper grinding disc (3), and a separating disc (27), a front surface (21) of the lower grinding disc is arranged opposite a front surface (31) of the upper grinding disc, with the separating disc (27) positioned in a gap between the front surface (21) of the lower grinding disc and the front surface (31) of the upper grinding disc; andthe bearing rollers refer to the bearing rollers being processed, which are cylindrical rollers (11) or conical rollers (12), with needle rollers classified as the cylindrical rollers (11); the surfaces of the cylindrical rollers are defined to comprises rolling surfaces (15) and end surfaces (17) of the cylindrical rollers (11); and the surfaces of the conical rollers are defined to comprises the rolling surfaces (15) and large end surfaces (16) of the conical rollers (12), with a cone angle of the conical rollers (12) is denoted as 2φ; andthe grinding disc assembly has the following three configurations:configuration one: the front surface (21) of the lower grinding disc is a working surface of the lower grinding disc, which is flat, and the front surface (31) of the upper grinding disc is equipped with a planar spiral groove (33), and a surface of the planar spiral groove (33) is a working surface of the upper grinding disc, and an axis of the planar spiral groove (33) aligns with an axis (32) of the upper grinding disc; and the separating disc (27) is a flat disc that features linear isolation grooves (28) arranged in a flat radial and a circumferential array, with the axes of the linear isolation grooves array being the axis of the separating disc (27); the upper grinding disc (3) is coaxial with the separating disc (27), and the axis (32) of the upper grinding disc and the axis of the separating disc (27) are perpendicular to the working surface of the lower grinding disc; andan area enclosed by the working surface of the lower grinding disc and the working surface of the upper grinding disc is defined as a grinding processing zone, an entrance (41) for the bearing rollers to enter the grinding processing zone is located at one end of the planar spiral groove (33), near an inner edge of the upper grinding disc (3), and leads to a back of the upper grinding disc (3);another end of the planar spiral groove (33), adjacent to an outer edge of the upper grinding disc (3), serves as an exit (42) for the bearing rollers to leave the grinding processing zone; the linear isolation grooves (28) extend from the entrance (41) outward beyond an outer edge of the lower grinding disc (2), and a width of the linear isolation grooves (28) is matched to a radial size of the bearing rollers; andduring a grinding process, the bearing rollers within the grinding processing zone are spaced apart by the separating disc (27) and distributed discretely along the planar spiral groove (33) of the front surface (31) of the upper grinding disc; and the lower grinding disc (2) and the upper grinding disc (3) approach each other to apply grinding loads to the bearing rollers distributed within the grinding processing zone, resulting in a line contact between the bearing rollers and the working surfaces of the lower grinding discs and the upper grinding discs, respectively; and the lower grinding disc (2) and the upper grinding disc (3) rotate relative to each other around the axis of the separating disc (27), causing the bearing rollers to continuously roll between the working surfaces of the lower grinding discs and upper grinding discs under friction drive from both surfaces;simultaneously, the bearing rollers move from the entrance (41) to the exit (42) along the planar spiral groove (33) and the linear isolation grooves (28), respectively, with the surfaces of the cylindrical rollers or the conical rollers continuously tangent to the working surface of the upper grinding disc; and the rolling surfaces (15) of the bearing rollers experience differential sliding against the working surfaces of the lower grinding discs and the upper grinding discs, thus achieving a grinding process of the rolling surfaces (15); andduring the grinding process, the separating disc (27) rotates around its own axis to drive the bearing rollers to revolve around the axis of the separating disc (27); alternatively, the separating disc (27) is driven to rotate around its own axis by the bearing rollers within the grinding processing zone; andwhen the bearing rollers are placed as a reference on the working surface of the lower grinding disc and maintain a contact state during the grinding process, a geometric center of the bearing rollers on the working surface of the lower grinding disc lies on a plane parallel to the working surface of the lower grinding disc, referred to as a base plane of the lower grinding disc (23); andwhen the bearing rollers are cylindrical rollers (11), axes (14) of the cylindrical rollers (11) are located on the base plane (23) of the lower grinding disc; and when the bearing rollers are the conical rollers (12), axes (14) of the conical rollers (12) intersect the base plane (23) of the lower grinding disc at an angle φ, which is half of the cone angle of the conical rollers (12); andwhen the bearing rollers are placed as a reference within the planar spiral groove (33) and maintains the contact state during the grinding process, the geometric center of the bearing rollers within the planar spiral groove (33) lies on a helical line, which is referred to as a groove baseline (35) and the groove baseline (35) lies on an upper grinding disc base plane (36); during the grinding process, the upper grinding disc base plane (36) coincides with the base plane of the lower grinding disc (23); andthe working surface of the upper grinding disc is a pair of conjugate surfaces with the surfaces of the bearing rollers, a planar helical movement of the bearing rollers around the axis (32) of the upper grinding disc represents a conjugate motion between the upper grinding disc (3) and the bearing rollers; andconfiguration two: the front surface (21) of the lower grinding disc is the working surface of the lower grinding disc, which is a conical surface with an axis of the conical surface being the axis (22) of the lower grinding disc; and the front surface (31) of the upper grinding disc features conical spiral grooves (34), with a groove surface of the conical spiral grooves (34) being the working surface of the upper grinding disc, and an axis of each conical spiral groove (34) aligning with the axis (32) of the upper grinding disc; and the separating disc (27) is a conical disc, which has linear isolation grooves (28) arranged in a conical radial and circumferential array, with axis of the linear isolation grooves array being the axis of the separating disc (27); and the lower grinding disc (2), the upper grinding disc (3), and the separating disc (27) are coaxial; andthe area enclosed by the working surfaces of the lower and upper grinding discs forms the grinding processing zone; the entrance (41) for the bearing rollers to enter the grinding processing zone is located at one end of the conical spiral grooves (34) adjacent to the inner edge of the upper grinding disc (3), leading to the back of the upper grinding disc (3); and another end of the conical spiral grooves (34) adjacent to the outer edge of the upper grinding disc (3) serves as the exit (42) for the bearing rollers leaving the grinding processing zone; the linear isolation grooves (28) extend from the entrance (41) to beyond the outer edge of the upper grinding disc (3), with the width of the linear isolation grooves (28) matching the radial dimensions of the bearing rollers; andduring the grinding process, the bearing rollers in the grinding processing zone are separated by the separating disc (27) and distributed discretely within the linear isolation grooves (28) along the conical spiral grooves (34) of the upper grinding disc front surface (31); the lower grinding disc (2) and the upper grinding disc (3) move closer to apply grinding loads on the bearing rollers distributed in the grinding processing zone, resulting in line contact between the bearing rollers and both the working surfaces of the lower grinding disc and upper grinding disc; the lower grinding disc (2) and the upper grinding disc (3) rotate relative to each other around the axis of the separating disc (27), causing the bearing rollers to roll continuously between the working surfaces of the lower grinding disc and upper grinding disc under the friction drive from those working surfaces; at the same time, the bearing rollers move from the entrance (41) to the exit (42) along the conical spiral grooves (34) and the linear isolation grooves (28), with either the surfaces of the cylindrical rollers or the surfaces of the conical rollers continuously tangent to the working surface of the upper grinding disc; and the rolling surfaces (15) of the bearing rollers engage in differential sliding with the working surfaces of both the lower grinding disc and the upper grinding disc, achieving the grinding process of the rolling surfaces (15); andduring the grinding process, the separating disc (27) rotates around its own axis, propelling the bearing rollers to revolve around the axis of the separating disc (27); alternatively, the separating disc (27) is rotated around its own axis by the bearing rollers within the grinding processing zone; andwhen the bearing roller is positioned as a reference on the working surface of the lower grinding disc and maintains the contact state of the grinding process, the geometric center of the bearing rollers on the working surface of the lower grinding disc lies on the conical surface that is coaxial with the working surface of the lower grinding disc and has a same conical angle; the conical surface is referred to the lower grinding disc base conical surface (24); when the bearing rollers are the cylindrical rollers (11), the axis (14) of the cylindrical rollers lies on the lower grinding disc base conical surface (24); when the bearing rollers are the conical rollers (12), the axis (14) of the conical rollers lies within an axial section (25) of the lower grinding disc base conical surface (24), intersecting with an intersection line (26) of the axial section of the lower grinding disc base conical surface (24) at the angle φ, which is half of the conical angle of the conical rollers (12); andwhen the bearing roller is placed as a reference within the conical spiral grooves (34) and maintains the contact state of the grinding process, the geometric center of the bearing roller in the conical spiral grooves (34) lies on the helical line, referred to as the conical spiral groove baseline (35); and the conical spiral groove baseline (35) lies on the conical surface, referred to as a upper grinding disc base conical surface (37); during grinding, the upper grinding disc base conical surface (37) coincides with the lower grinding disc base conical surface (24); andthe working surface of the upper grinding disc and the surfaces of the bearing rollers form a pair of conjugate surfaces; the conical helical motion of the bearing roller around the axis (32) of the upper grinding disc represents the conjugate motion between the upper grinding disc (3) and the bearing rollers; andconfiguration three: the configuration three is only applicable for the finishing of the rolling surfaces (15) of cylindrical rollers, the front face (21) of the lower grinding disc is the working surface of the lower grinding disc, which is flat; the front face (31) of the upper grinding disc is the working surface of the upper grinding disc, which is also flat; and the separating disc (27) is a flat disc that features linear isolation grooves (28) arranged in a radial and circumferential array, with the axis of the array of linear isolation grooves aligned with the axis of the separating disc (27); the working surface of the upper grinding disc is parallel to that of the lower grinding disc, and the axis of the separating disc (27) is perpendicular to both the working surfaces of the upper grinding disc and lower grinding disc; andthe area enclosed by the working surfaces of the lower grinding disc and the upper grinding disc forms the grinding processing area; the entrance (41) for the cylindrical roller (11) to enter the grinding processing area is located at the inner edge of the upper grinding disc (3) and leads from the working surface of the upper grinding disc to its back; and the exit (42) for the cylindrical roller (11) to leave the grinding processing area is at the outer edge of the upper grinding disc (3); the linear isolation grooves (28) extend from the entrance (41) beyond the outer edge of the lower grinding disc (2), and the width of the linear isolation groove (28) matches the radial size of the cylindrical rollers; andduring the grinding process, the cylindrical rollers (11) in the grinding processing area is separated by the separating disc (27) within each linear isolation groove (28); the lower grinding disc (2) and the upper grinding disc (3) approach each other to apply a grinding load to the cylindrical roller (11) distributed within the grinding processing area, resulting in line contact between the rolling surface (15) of the cylindrical roller and the working surfaces of both the lower and upper grinding discs; the lower grinding disc (2) and the upper grinding disc (3) rotate relative to each other around the axis of the separating disc (27); the cylindrical rollers (11) roll continuously between the working surfaces of the lower grinding disc and upper grinding disc, driven by friction, while simultaneously moving from the entrance (41) to the exit (42) along the linear isolation grooves (28); and the rolling surfaces (15) of the cylindrical rollers experience differential sliding with both the working surfaces of the lower grinding disc and the upper grinding disc, achieving the grinding process of the rolling surfaces (15);during the grinding process, the separating disc (27) rotates around its own axis, propelling the bearing rollers to revolve around the axis of the separating disc (27); alternatively, the separating disc (27) is driven to rotate around its own axis by the cylindrical rollers (11) within the grinding processing area; andwhen the cylindrical roller is used as a reference and is placed within the grinding disc assembly while maintaining contact with the lower grinding disc (2) and the upper grinding disc (3) during the grinding process, the geometric center of the cylindrical roller (11) within the same linear isolation groove (28) lie along a same line, referred to as a isolation groove baseline (29); the isolation groove baseline (29) intersects perpendicularly with the axis of the separating disc (27) and has an eccentric distance; the axis (14) of the cylindrical rollers lies on the isolation groove baseline (29).

2. A grinding device for a finishing of rolling surfaces of bearing rollers, wherein, comprising a main machine, an external circulation equipment (5), and the grinding disc assembly for the finishing of rolling surfaces of bearing rollers of claim 1;the main machine comprises a rotary component and a loading component;the rotary component is configured to drive the lower grinding disc (2) to rotate relative to the upper grinding disc (3), and the loading component is configured to drive the lower grinding disc (2) to approach the upper grinding disc (3) in order to apply the grinding load to the bearing rollers distributed within the grinding processing area;the external circulation equipment (5) comprises a material receiving device, a feeding device, a storage station, and a plurality of storage bins (61), and a controller; andthe storage station is configured to store the storage bins (61); the storage bins (61) are configured to temporarily hold the bearing rollers; each storage bin (61) comprises one or more storage channels (63), wherein the bearing rollers are stored in a single line queue, with axes parallel to each other and rolling surfaces (15) in close proximity to each other, to reduce mutual collisions between the bearing rollers and avoid impact damage; the storage channel (63) runs vertically from the channel entrance to the channel exit; the storage bins (61) serve as a hardware basis for adjusting order and position of the bearing rollers in a bearing roller queue under conditions where there is no physical contact between the bearing rollers loaded into different storage bins (61); the bearing roller queue comprises a closed-loop queue of all bearing rollers located within the grinding processing area and the external circulation equipment (5); andthe material receiving device is configured to load the bearing rollers leaving the exit (42) of the grinding processing area into empty storage bins (61) in way of the bearing roller queue being processed and a posture being controlled; andthe feeding device is configured to unload the bearing rollers from a selected storage bin (61) within the storage station based on decisions from the controller, to enter the grinding processing area in a controlled posture according to posture requirements of the bearing rollers;the bearing rollers in the same storage channel (63) enter the storage channel (63) and exit in a first-in, first-out sequence;the controller is configured to decide when to unload the bearing rollers from which of the storage bins (61); the controller serves as a software basis for adjusting the order and position of the bearing rollers in the bearing roller queue under conditions where there is no physical contact between the bearing rollers loaded into different storage bins (61); andduring the grinding process, the bearing rollers that have completed a grinding operation leave the grinding processing area from the exit (42), the bearing rollers leaving the grinding processing area are temporarily stored in the empty storage bins (61) and placed in the storage station; and based on the decisions of the controller, the bearing rollers are unloaded from the selected storage bin (61) and sent from the entrance (41) into the grinding processing area to continue receiving grinding; and the order and position of the bearing rollers entering the grinding processing area are updated according to the decisions of the controller, thus achieving a block mixing and swapping of the bearing rollers without physical contact between the bearing rollers loaded into different storage bins (61); andan entire process of the the bearing rollers constitutes one grinding cycle, includes entering into the grinding processing area from the entrance (41), undergoing grinding within the grinding processing area, and exiting the grinding processing area from the exit (42); andthe changes in the order and position of the bearing rollers leaving the grinding processing area from the exit (42) that occur within the external circulation equipment (5) modify the combination of the bearing rollers entering the grinding processing area subsequently, thereby extending a material selective removal effect occurring among the bearing rollers in the grinding processing area to an entire batch of bearing rollers; with an increase in grinding cycles, and a size consistency of the bearing rollers improves continuously until specified technical indicators are reached; andon one hand, the external circulation equipment (5) is configured to manage the grinding processing of large batches of the bearing rollers exceeding a capacity of the grinding processing area; and on the other hand, to establish a logistics channel for the bearing rollers between the exit (42) and the entrance (41); the external circulation equipment (5) is also configured for mixing and location exchanging the bearing rollers.

3. The grinding device for the finishing of the rolling surfaces of the bearing rollers according to claim 2, wherein, storage space of the storage bins (61) is divided into multiple parallel storage channels (63), which are arranged at an inclination relative to the horizontal plane; a width of each storage channel (63) matches an axial length of the bearing rollers; an upper end of each storage channel (63) is the entrance, and a lower end of each storage channel (63) is the exit, equipped with an exit gate (62); the bearing rollers are sequentially stored in the storage channels (63) in the single line queue, with their axes parallel to each other and the rolling surfaces (15) closely adjacent to the rolling surfaces (15); the exit gate (62) is in an open state when the bearing rollers are unloaded from the storage channels (63); andthe storage bins (61) are installed in layers within the storage station; andthe receiving device comprises a receiving mechanism, a front station receiving mechanism (78), and a front station transition mechanism (79); andboth the front station receiving mechanism (78) and the front station transition mechanism (79) are equipped with the storage channels (63) consistent with those in the storage bins (61); andthe receiving mechanism comprises a support base disc (72) and a receiving transition channel (75); the support base disc (72) is fixedly connected to a bed of the grinding device, arranged around the outer edge of the lower grinding disc (2), and positioned below the separating disc (27); under a constraint guidance of the linear isolation grooves (28) and a support of the support base disc (72), the bearing rollers maintain their posture as they leave the grinding processing area from the exit (42); the receiving transition channel (75) comprises an arc channel (76), which is arranged around the outer edge of the lower grinding disc (2) and connects to the support base disc (72); and the arc channel (76) gradually descends from the connection point with the support base disc (72) to its endpoint, ensuring that the linear isolation grooves (28) passes above the endpoint of the arc channel (76) without interfering with the bearing rollers that are gradually disengaging from the constraint guidance of the linear isolation grooves (28); and a width of the receiving transition channel (75) matches the axial length of the bearing rollers; the receiving transition channel (75) connects to the storage channels (63) of the front station receiving mechanism (78) or connects to the storage channels (63) of the front station receiving mechanism (78) through a conveyor mechanism; and the bearing rollers enter the storage channels (63) of the front station receiving mechanism (78) via the receiving transition channel (75), or they sequentially pass through the receiving transition channel (75) and the conveyor mechanism to enter the storage channels (63) of the front station receiving mechanism (78); andwhen the front station receiving mechanism (78) is fully loaded with bearing rollers, a channel entrance of the front station transition mechanism (79) connects to a channel exit of the front station receiving mechanism (78), allowing all bearing rollers within the front station receiving mechanism (78) to be transferred in a rolling manner to the storage channels (63) of the front station transition mechanism (79); the channel exit of the fully loaded front station transition mechanism (79) connects to the channel entrance of the empty storage bins (61) within the storage station, allowing all bearing rollers within the front station transition mechanism (79) to be loaded into the storage channels (63) of the storage bins (61) in the rolling manner; andwherein the feeding device comprises a rear station transition mechanism (81), a rear station feeding mechanism (82), and a feeding channel (83); andboth the rear station transition mechanism (81) and the rear station feeding mechanism (82) are equipped with the storage channels (63) consistent with those in the storage bin (61); the feeding channel (83) is positioned in upper space at the back of the upper grinding disc (3) and communicates with the entrance (41); andbased on the decision of the controller, the channel entrance of the rear station transition mechanism (81) connects to the channel exit of the selected storage bin (61) in the storage station, unloading all the bearing rollers in the storage bin (61) in a rolling manner to the storage channel (63) of the rear station transition mechanism (81), thereby emptying the storage channel (63) of the storage bins (61); the channel exit of the fully loaded rear station transition mechanism (81) connects to the channel entrance of the rear station feeding mechanism (82), allowing the bearing rollers within the rear station transition mechanism (81) to be transferred in a rolling manner to the storage channel (63) of the rear station feeding mechanism (82); the channel exits of multiple storage channels in the rear station feeding mechanism (82) sequentially connect to the feeding channel (83) or sequentially connect to the feeding channel (83) through the feeding transition channel (84) to send the bearing rollers into the entrance (41) through the feeding channel (83); andthe feeding channel (83) is a curved channel, a zigzag channel, or a winding combination channel; during a process of entering the entrance (41) via the feeding channel (83), the bearing rollers from the rear station feeding mechanism (82) roll down in a single line queue, with their axes parallel to each other and their rolling surfaces (15) closely adjacent to the rolling surfaces (15) along a curved path, a zigzag path, or a twisted combination path, assisted by their own weight; a width of the feeding channel (83) matches the axial length of the bearing rollers.

4. The grinding device for the finishing of the rolling surfaces of the bearing rollers according to claim 2, wherein, each storage bin (61) has a storage space composed of one or more vertically arranged parallel storage channels (63); the storage channels (63) are the curved path, the zigzag path, or have the twisted combination path; during a process of depositing into or unloading from the storage bins (61), the bearing rollers roll in the storage channel (63) from top to bottom under their own weight, maintaining a single line alignment with their axes parallel and their rolling surfaces (15) close to each other along the curved path, the zigzag path, or the twisted path; the width of the storage channel (63) matches the axial length of the bearing rollers; the upper end of the storage channel (63) serves as the channel entrance, while the lower end serves as the channel exit and is equipped with an outlet gate (62); the bearing rollers are stored in the storage channel (63) in a single line arrangement, with their axes parallel and rolling surfaces (15) close together, in an upward sequence; the outlet gate (62) is in the open state when the bearing rollers are unloaded from the storage channel (63); andthe storage station is equipped with a transport robot (64) for moving the storage bins (61); andthe receiving device is equipped with a receiving mechanism; andthe receiving mechanism comprises the supporting base disc (72) and the receiving transition channel (75); the supporting base disc (72) is fixedly connected to the bed of the grinding device, arranged around the outer edge of the lower grinding disc (2), and positioned below the separating disc (27); under the guidance of the linear isolation grooves (28) and the support of the supporting base disc (72), the bearing rollers maintain their posture as they leave the grinding area from the exit (42); the receiving transition channel (75) comprises an arc channel (76), which is arranged around the outer edge of the lower grinding disc (2) and interfaces with the supporting base disc (72); the arc channel (76) gradually descends from its junction with the supporting base disc (72) to its endpoint to ensure that the linear isolation grooves (28) pass over the endpoint of the arc channel (76) without interfering with the bearing rollers that are gradually departing from the linear isolation grooves (28); the width of the receiving transition channel (75) matches the axial length of the bearing rollers, which constrains their posture as they roll through the receiving transition channel (75) to avoid getting stuck; and the receiving transition channel (75) connects to the storage channel (63) of the storage bins (61) or interfaces with the storage channels (63) of the storage bins (61) through the conveying mechanism; the bearing rollers pass through the receiving transition channel (75) or sequentially through the receiving transition channel (75) and the conveying mechanism into the storage channels (63) of the storage bins (61);the feeding device is equipped with a feeding channel (83); the feeding channel (83) is located in the upper space at the back of the upper grinding disc (3) and communicates with the entrance (41); andthe operation of the transport robot (64) comprises: moving the empty storage bins (61) out of the storage station and ensuring that the channel entrance of the storage bin (61) connects to the receiving transition channel (75) or the conveying mechanism to receive bearing rollers from the receiving mechanism; and when the storage bins (61) are fully loaded with bearing rollers, the transport robot (64) returns the empty storage bins (61) to the storage station for temporary storage;based on decisions made by the controller, the transport robot (64) moves the fully loaded storage bin (61) within the storage station and ensures that the exit of the storage bins (61) connect to the feeding channel (83) to unload the bearing rollers; andthe feeding channel (83) is the curved, zigzag, or twisted combination channel; during the process in which the bearing rollers enter the entrance (41) via the feeding channel (83), the bearing rollers from the storage bins (61) roll in the feeding channel (83) under their own weight in a single line arrangement, with their axes parallel and rolling surfaces (15) close together, along the curved path, the zigzag path, or the twisted combination path; the width of the feeding channel (83) matches the axial length of the bearing rollers.

5. The grinding device for the finishing of the rolling surfaces of the bearing rollers according to claim 4, wherein, the receiving device is equipped with a receiving buffer station, which has a receiving station and a first buffer station; the receiving buffer station comprises a first bracket (91) and a first guide rail (92); and the first bracket (91) is configured to hold the storage bins (61), and the first bracket (91) along with the storage bins (61) moves back and forth between the receiving station and the first buffer station along the first guide rail (92); the transport robot (64) removes the empty storage bins (61) from the storage station and places them on the first bracket (91) located at the first buffer station; the storage bins (61) at the receiving station move along the first guide rail (92) so that the channel entrance aligns with the receiving transition channel (75) or the conveyor mechanism to receive bearing rollers from the receiving mechanism; after being fully loaded, the fully loaded storage bins (61) switch to the first buffer station, while the empty storage bins (61) switch to the receiving station; the transport robot (64) sends one selected fully loaded storage bin (61) located at the first buffer station back to the storage station for temporary storage, and then removes another empty storage bin (61) from the storage station and places it on the first bracket (91) located at the first buffer station, continuously repeating this process; andthe feeding device is equipped with a feeding buffer station, which has a feeding station and a second buffer station, the feeding buffer station includes a second bracket (91′) and a second guide rail (92′); and the second bracket (91′) is configured to hold the storage bins (61), and the second bracket (91′) along with the storage bins (61) moves back and forth between the feeding station and the second buffer station along the second guide rail (92′); the transport robot (64) removes the fully loaded storage bins (61) selected by the controller from the storage station and places it on the second bracket (91′) located at the buffer station; and the storage bins (61) at the feeding station move along the second guide rail (92′) so that the channel exit aligns with the feeding channel (83) to unload the bearing rollers; after being emptied, the empty storage bins (61) switch to the buffer station, while the fully loaded storage bins (61) switch to the feeding station; and the transport robot (64) sends one selected empty storage bin (61) located at the second buffer station back to the storage station and then removes another fully loaded storage bin (61) selected by the controller from the storage station and places it on the second bracket (91′) located at the buffer station, continuously repeating this process.

6. A grinding device for finishing of rolling surfaces of bearing rollers, wherein comprising a main machine, an external circulation equipment (5), and the grinding disc assembly for the finishing of rolling surfaces of bearing rollers of claim 1;the main machine comprises a rotating component and a loading component; andthe rotating component is configured to drive the lower grinding disc (2) to rotate relative to the upper grinding disc (3), while the loading component is configured to drive the lower grinding disc (2) to approach the upper grinding disc (3) in order to apply grinding load to the bearing rollers distributed in the grinding processing area; andthe external circulation equipment (5) comprises a receiving mechanism, a lifting mechanism, and the feeding channel (83); andthe feeding channel (83) is located in the upper space on the back of the upper grinding disc (3) and communicates with the entrance (41); andthe receiving mechanism comprises a supporting base (72) and a receiving transition channel (75); and the supporting base (72) is fixedly connected to the body of the grinding equipment, arranged around the outer edge of the lower grinding disc (2), and positioned beneath the separating disc (27); and under the constraint and guidance of the linear isolation grooves (28) and the support of the supporting base (72), the bearing rollers maintain their posture while leaving the grinding processing area from the exit (42); and the receiving transition channel (75) comprises an arc channel (76), which is arranged around the outer edge of the lower grinding disc (2) and connects to the supporting base (72); the arc channel (76) gradually descends from a connection point with the supporting base (72) to its endpoint, ensuring that the linear isolation grooves (28) do not interfere with the bearing rollers that are gradually leaving the constraint of the linear isolation grooves (28) while passing above the endpoint of the arc channel (76); and the width of the receiving transition channel (75) matches the axial length of the bearing rollers; andthe receiving transition channel (75) connects to the lifting mechanism or interfaces with the lifting mechanism through a conveyor mechanism; the bearing rollers enter the lifting mechanism through the receiving transition channel (75), or sequentially pass through the receiving transition channel (75) and the conveyor mechanism into the lifting mechanism; andthe lifting mechanism is used to elevate the bearing rollers in a single isolated, single line queue with controlled posture, either connecting with the feeding channel (83) or interfacing with the feeding channel (83) through the conveyor mechanism; the bearing rollers enter the feeding channel (83) via the lifting mechanism or sequentially pass through the lifting mechanism and the conveyor mechanism into the feeding channel (83); andthe feeding channel (83) is the curved channel, the zigzag channel, or the combined winding channel; during the process of entering the grinding processing area through the entrance (41) via the feeding channel (83), the bearing rollers from the lifting mechanism or conveyor mechanism roll in a single line queue, with axes parallel and rolling surfaces (15) close to each other, along the curved path, the zigzag path, or the combined winding path, aided by their own weight; and the width of the feeding channel (83) matches the axial length of the bearing rollers;all the bearing rollers complete the grinding cycle when they enter the grinding processing area from the entrance (41), undergo grinding in the grinding processing area, and leave the grinding processing area from the exit (42); as the number of grinding cycles increases, the selective material removal effect occurring between the bearing rollers in the grinding processing area gradually expands to the entire batch of bearing rollers, continuously improving the size consistency of the bearing rollers until the specified technical indicators are met.

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