Lead screw nut machining device and control method

Abstract

The invention discloses a lead screw nut machining device and a control method. An upper cross beam assembly is arranged on a base, a retainer assembly is arranged below the upper cross beam assembly, and a clamping assembly is arranged below the retainer assembly; the lower cross beam assembly is arranged below the clamping assembly; the two ends of the cutter shaft in the length direction are detachably fixed with the upper locking part and the lower locking part respectively; according to the feed screw nut machining device and the control method, the tool shaft is fixed through cooperation of the upper cross beam assembly and the lower cross beam assembly, the upper cross beam assembly and the lower cross beam assembly independently work, a larger freedom degree is provided for the fixing form of the tool shaft, and a foundation is provided for improvement of the machining efficiency; the distance between the retainer frame and the upper locking part of the upper cross beam is consistent, so that a high-quality guide function is always formed between the retainer and the cutter shaft, the vibration and deformation trend of the cutter shaft is limited, and finally, the machining precision of the screw rod nut is improved.

Description

Technical Field

[0001] The invention relates to a screw rod nut processing device, and in particular to a screw rod nut processing device and a control method. Background Art

[0002] As a core component in the field of mechanical transmission, the lead screw pair occupies a pivotal position in intelligent manufacturing fields such as machine tools and automated production lines. With the continuous growth of market demand, the fast-feed lead screw pair has gradually highlighted its high-speed and stable transmission advantages in the field of automated production lines. Among them, the large lead nut is an important component of the fast-feed lead screw pair, and its processing technology plays a vital role in ensuring the precision and stability of the transmission. Therefore, the processing technology of the large lead nut has become a key link in the manufacturing process of the fast-feed lead screw pair.

[0003] There are two main strategies to increase the thread lead: one is to directly increase the thread lead during the processing process, and the other is to increase the number of thread starts. From the perspective of the stability of the transmission system, increasing the number of thread starts is usually used to increase the nut lead. The increase in the number of thread starts means that the linear feed of the screw nut will increase accordingly for each rotation of the screw.

[0004] For the processing of the inner raceway of large lead nuts, the traditional method is to use the form grinding method. This method uses a grinding wheel with a specific cross-section to cut the metal material to form the required inner raceway shape. However, this processing process is relatively complicated and inefficient, and during the cutting process, the metal material structure of the screw nut is cut off, while the mechanical properties of the parent material are not improved. Especially for screw nuts with smaller diameters, the yield rate of this method is low due to the limited insertion length of the tool.

[0005] In order to overcome the above challenges, the extrusion one-step forming technology was introduced into the processing of large lead nuts. This technology uses the steel ball embedded in the tool to spirally extrude the inside of the nut. By adjusting the embedding depth of the steel ball, the tool can gradually extrude the inside of the nut from shallow to deep, thus completing one-step forming. Since the extrusion forming technology does not require material reduction processing of the nut, it effectively improves the forming quality of the nut and significantly improves the yield of small diameter and large lead nuts. However, the current extrusion forming nuts cannot achieve coordination in terms of fixing effect and processing efficiency. Summary of the invention

[0006] The main purpose of the present invention is to provide a screw nut processing device and a control method, aiming to solve the problem that the current extrusion forming nut device cannot achieve coordination in terms of fixing effect and processing efficiency.

[0007] In order to achieve the above object, the present invention provides a screw nut processing device, comprising: A base having a plurality of optical axes arranged in a length direction; An upper crossbeam assembly is arranged on the base and comprises an upper linear drive and an upper crossbeam, wherein the upper crossbeam is connected to an output end of the upper linear drive and moves in a vertical direction, and an upper locking portion is arranged on the lower surface of the upper crossbeam; A retainer assembly, disposed below the upper beam assembly and comprising a retainer frame and a retainer disposed on the retainer frame, wherein the retainer frame is slidably disposed on the optical axis and connected to an output end of the upper linear drive; a clamping assembly disposed below the retainer assembly and comprising a spindle and a chuck disposed on the spindle, the spindle drive being connected to a rotary drive; A lower crossbeam assembly is disposed below the clamping assembly and includes a lower linear drive, a lower crossbeam, and a lower locking portion. The lower crossbeam is driven in a vertical direction by the lower linear drive, and a lower locking portion is disposed on an upper surface of the lower crossbeam. The tool shaft has two ends in the length direction which are detachably fixed to the upper locking part and the lower locking part respectively, and processing heads are arranged in an array on the outer wall of the tool shaft; A processing unit, controlling the operation of the upper linear drive, the rotary drive, the chuck and the lower linear drive; The retainer, the chuck and the center axis of the main shaft all penetrate and match the tool axis.

[0008] Furthermore, a first inner groove is provided on the circumferential wall at both ends of the tool shaft, and a second inner groove matching the first inner groove is provided on the inner walls of the upper locking part and the lower locking part. When the tool shaft is combined with the upper locking part and the lower locking part, the first inner groove and the second inner groove form a channel structure extending to the outer surface of the upper locking part and the outer surface of the lower locking part.

[0009] Furthermore, a locking shaft for controlling the processing part is telescopically arranged corresponding to the channel structure.

[0010] Further, one of the upper linear drive and the lower linear drive is a pneumatic drive type, and the other is a motor drive type.

[0011] Furthermore, the upper locking portion and the lower locking portion are provided with a supporting structure corresponding to the tool axis in the height direction.

[0012] Furthermore, a robot for loading and unloading is provided corresponding to the clamping assembly.

[0013] Furthermore, the retainer includes a plane bearing and a nut portion, the plane bearing has a base ring and a mounting ring that are relatively rotatably fixed, the base ring is connected to the retainer frame, the nut portion is mounted on the mounting ring, and the shape of the nut portion corresponds to the tool axis.

[0014] The present invention provides a control method, which is applied to the above-mentioned screw nut processing device, comprising: S1, after receiving the first signal that the upper locking part and the tool shaft are released, controlling the lower linear drive to drive the lower beam downward to a first preset position; S2, receiving a second signal of sampling completion, and controlling the lower linear drive to drive the lower beam upward to a second preset position; S3, receiving a third signal indicating that the upper locking part and the tool shaft are locked, receiving a fourth signal indicating that the lower locking part and the tool shaft are released, and controlling the lower linear drive to drive the lower beam upward to a third preset position; S4, receiving a fourth signal indicating that the lofting is completed, and controlling the upper locking part to drive the lower beam downward to a fourth preset position; S5, receiving the fifth signal indicating that the locking of the lower locking part and the tool shaft is completed, and controlling the lower linear drive and the upper locking part to move downward until the lower beam reaches the second preset position.

[0015] Further, the peripheral walls at both ends of the tool shaft are provided with first inner grooves, and the inner walls of the upper locking portion and the lower locking portion are provided with second inner grooves matching the first inner grooves. When the tool shaft is combined with the upper locking portion and the lower locking portion, the first inner groove and the second inner groove form a channel structure extending to the outer surface of the upper locking portion and the outer surface of the lower locking portion, and a locking shaft for controlling the processing portion is telescopically provided corresponding to the channel structure, and the step S1 includes: Control the locking shaft on the upper locking part to retract outward; The steps between step S2 and step S3 include: Control the locking shaft on the upper locking part to extend inwards, and control the locking shaft on the lower locking part to retract outwards; The steps between step S4 and step S5 include: Control the locking shaft on the lower locking part to extend inward.

[0016] Furthermore, a manipulator for loading and unloading is provided corresponding to the clamping assembly, and the step S2 includes: receiving a second signal sent by the manipulator indicating that sampling is completed, and controlling the lower linear drive to drive the lower beam upward to a second preset position; The steps of S4 include: A fourth signal indicating that the lofting is completed is received from the manipulator, and the upper locking part is controlled to drive the lower beam downward to a fourth preset position.

[0017] The screw nut processing device and control method provided by the present invention achieve fixation of the tool shaft through the cooperation of the upper beam assembly and the lower beam assembly, and the upper beam assembly and the lower beam assembly work independently to provide greater freedom for the fixation of the tool shaft, providing a basis for improving processing efficiency; the distance between the retainer frame and the upper locking portion of the upper beam is consistent, ensuring that the retainer can always form a high-quality guiding effect with the tool shaft, so that the vibration and deformation tendency of the tool shaft are limited, and ultimately the processing accuracy of the screw nut is improved; changing the size of the tool shaft and adjusting the corresponding matching parts at the same time can realize the processing of screw nuts of different models. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a schematic diagram of a screw rod nut processing device according to an embodiment of the present invention; Figure 2 It is a schematic diagram of the main structure of the screw rod and nut processing device in one embodiment of the present invention in the screw rod and nut processing state; Figure 3 yes Figure 3 A partial enlarged view of; Figure 4 yes Figure 4 B is a partial enlarged view; Figure 5 It is a schematic diagram of the main structure of the screw nut processing device in one embodiment of the present invention in the screw nut blanking state; Figure 6 It is a schematic diagram of the main structure of the screw nut processing device in one embodiment of the present invention in the screw nut loading state; Figure 7 It is a schematic diagram of a tool shaft in a screw nut processing device according to an embodiment of the present invention; Figure 8 It is a schematic diagram of a retainer in a screw nut processing device according to an embodiment of the present invention.

[0019] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0020] It should be understood that the specific embodiments described herein are only used to explain the present invention, and are not used to limit the present invention.

[0021] Those skilled in the art will appreciate that, unless expressly stated otherwise, the singular forms "a", "an", "said", "above", and "the" used herein may also include plural forms. It should be further understood that the term "comprising" used in the specification of the present invention refers to the presence of the features, integers, steps, operations, elements, units, modules, and / or components, but does not exclude the presence or addition of one or more other features, integers, steps, operations, elements, units, modules, components, and / or groups thereof. It should be understood that when we refer to an element as being "connected" or "coupled" to another element, it may be directly connected or coupled to the other element, or there may be intermediate elements. In addition, the "connection" or "coupling" used herein may include wireless connection or wireless coupling. The term "and / or" used herein includes all or any unit and all combinations of one or more associated listed items.

[0022] Those skilled in the art will understand that, unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as those generally understood by those skilled in the art in the field to which the present invention belongs. It should also be understood that terms such as those defined in common dictionaries should be understood to have meanings consistent with the meanings in the context of the prior art, and will not be interpreted with idealized or overly formal meanings unless specifically defined as here.

[0023] Reference Figures 1 to 8 In one embodiment of the present invention, a screw nut processing device includes: The base 100 is provided with a plurality of optical axes 110 in the length direction; An upper beam assembly 200 is disposed on the base 100 and includes an upper linear drive and an upper beam 210. The upper beam 210 is connected to the output end of the upper linear drive and moves in a vertical direction. An upper locking portion 220 is disposed on the lower surface of the upper beam 210. A holder assembly 300 is disposed below the upper beam assembly 200 and includes a holder frame 310 and a holder 320 disposed on the holder frame 310, wherein the holder frame 310 is slidably disposed on the optical axis 110 and connected to an output end of the upper linear drive; The clamping assembly 400 is disposed below the retainer assembly 300 and includes a spindle 410 and a chuck 420 disposed on the spindle 410 , wherein the spindle 410 is drivingly connected to a rotation drive 430 ; The lower beam assembly 500 is disposed below the clamping assembly 400 and includes a lower linear drive, a lower beam 510, and a lower locking portion 520. The lower beam 510 is driven in the vertical direction by the lower linear drive, and the upper surface of the lower beam 510 is provided with a lower locking portion 520; The tool shaft 600, both ends of which are detachably fixed to the upper locking portion 220 and the lower locking portion 520, respectively, and processing heads are arranged in an array on the outer wall of the tool shaft 600; A processing unit, controlling the operation of the upper linear drive, the rotary drive 430, the chuck 420 and the lower linear drive; The central axes of the retainer 320 , the chuck 420 , and the main shaft 410 all penetrate and match the tool shaft 600 .

[0024] In the prior art, the fixing effect and processing efficiency of the extruded nut cannot be coordinated.

[0025] In the present invention, the base 100 serves as the overall structural foundation, providing an installation foundation for subsequent related components. A plurality of optical axes 110 are arranged in the length direction of the base 100, and the optical axes 110 are preferably arranged at intervals in the width direction. The optical axes 110 provide a foundation for subsequent components to slide in the vertical direction.

[0026] The upper beam assembly 200 is arranged on the base 100 and includes an upper linear drive and an upper beam 210. The upper beam 210 is connected to the output end of the upper linear drive and moves in the vertical direction. The lower surface of the upper beam 210 is provided with an upper locking portion 220. The upper locking portion 220 provides a basis for fixing the subsequent tool shaft 600. The driving mode of the upper linear drive can be pneumatic drive, hydraulic drive, motor drive, etc.

[0027] The holder assembly 300 is arranged on the base 100 and is located below the upper beam assembly 200. The holder assembly 300 includes a holder frame 310 and a holder 320 arranged on the holder frame 310. The holder frame 310 is slidably arranged on the optical axis 110 and connected to the output end of the upper linear drive. The function of the holder 320 is to fix the subsequent tool shaft 600, and the tool shaft 600 has an extrusion molding head arrangement, which limits the connection of the holder frame 310 to the output end of the upper linear drive, and finally makes the distance between the holder frame 310 and the upper locking portion 220 of the upper beam 210 consistent, ensuring that the holder 320 can always form a high-quality guiding effect with the tool shaft 600. The processing head on the tool shaft 600 is preferably aligned in the length direction of the tool shaft 600, at which time the holder 320 and the tool shaft 600 are easily slidably connected in the length direction, otherwise the holder 320 and the tool shaft 600 should be clearance-fitted, or the molding of the holder 320 should be set.

[0028] The clamping assembly 400 is disposed on the base 100 and is located below the retainer assembly 300. The clamping assembly 400 includes a main shaft 410 and a chuck 420 disposed on the main shaft 410. The main shaft 410 is driven and connected to a rotary drive 430. When the rotary drive 430 is working, the main shaft 410 is driven to rotate, and the chuck 420 thereon also rotates. The chuck 420 is used to clamp the screw nut raw material 010, and the specific working mode of the chuck 420 can be pneumatic clamping or motor clamping.

[0029] The lower crossbeam assembly 500 is arranged on the base 100 and is located below the clamping assembly 400. The lower crossbeam assembly 500 includes a lower linear drive, a lower crossbeam 510, and a lower locking portion 520. The lower crossbeam 510 is driven in the vertical direction by the lower linear drive, and the upper surface of the lower crossbeam 510 is provided with a lower locking portion 520. The driving mode of the lower linear drive can be pneumatic drive, hydraulic drive, motor drive, etc. The two ends of the tool shaft 600 in the length direction are respectively fixed to the upper locking portion 220 and the lower locking portion 520 in a detachable manner. The connection mode of the tool shaft 600 with the upper locking portion 220 and the lower locking portion 520 can be various, and even the upper locking portion 220 and the lower locking portion 520 can be set as an automatic chuck structure, so as to achieve the clamping and release of the tool shaft 600. According to different types, the upper linear drive, the rotary drive 430 and the lower linear drive can be matched with a reduction device to increase the torque at the output end. The movement of the upper beam 210, the retainer frame 310 and the lower beam 510 on the base 100 can be provided with a guiding mechanism (such as the optical axis 110), and the guiding mechanism can also be shared, specifically, the guidance can be achieved by the matching of holes and columns.

[0030] The processing unit controls the upper linear drive, the rotary drive 430, the chuck 420 and the lower linear drive. The specific control method of the processing unit can be completed by a preset program in the single chip microcomputer, or by real-time detection and control through corresponding sensors, or a combination of the two control methods.

[0031] The central axes of the holder 320, the chuck 420, and the spindle 410 all penetrate and match the tool shaft 600. For example, the upper end of the tool shaft 600 in the length direction is connected to the upper locking portion 220, and then passes through the holder 320, the chuck 420 and the spindle 410 in sequence, and then the lower end of the tool shaft 600 in the length direction is connected to the lower locking portion 520.

[0032] During the working process, the process is as follows: drive the upper beam assembly 200 to a high position (at this time, the tool shaft 600 is fixed to the upper beam assembly 200), complete the placement of the screw nut raw material 010 in the clamping assembly 400; drive the upper beam assembly 200 downward, and the tool shaft 600 passes through the screw nut raw material 010 and the clamping assembly 400 (when the tool shaft 600 is first installed, it is also necessary to pass through the retainer assembly 300), and the specific driving position is to make the tool shaft 600 connected to the lower beam assembly 500; after the tool shaft 600 is connected to the lower beam assembly 500, drive the upper beam assembly 200 and the lower crossbeam assembly 500 move downward at the same time, and start the rotary drive 430 to start working, thereby completing the processing of the screw nut raw material 010; the tool shaft 600 is disengaged from the upper crossbeam assembly 200, and the lower crossbeam assembly 500 continues to move downward until the tool shaft 600 is separated from the screw nut product, thereby completing the sampling action; after the lower crossbeam assembly 500 is driven upward to the position where the tool shaft 600 can be connected to the upper crossbeam assembly 200, the tool shaft 600 is connected to the upper crossbeam assembly 200, and then the tool shaft 600 is disengaged from the lower crossbeam assembly 500. Repeating the above process can complete the processing of the screw nut, the specific steps are as follows: S1. After receiving the first signal indicating that the upper locking portion 220 and the tool shaft 600 have been released, the lower linear drive is controlled to drive the lower beam 510 downward to the first preset position. In the previous cycle before this step, the screw nut product has been processed. In this step, the tool shaft 600 is moved downward to provide a basis for the removal of the screw nut product. S2. After receiving the second signal indicating that sampling is completed, the lower linear drive is controlled to drive the lower beam 510 upward to the second preset position. In this step, after sampling is completed, the tool shaft 600 is moved upward again to provide a basis for the upper end of the tool shaft 600 to be connected to the upper beam assembly 200.

[0033] S3, receiving the third signal indicating that the upper locking part 220 and the tool shaft 600 are locked, receiving the fourth signal indicating that the lower locking part 520 and the tool shaft 600 are released, and controlling the lower linear drive to drive the lower beam 510 upward to the third preset position. In this step, the tool shaft 600 is only connected to the upper beam assembly 200 and moves upward, providing a basis for the lofting of the screw nut raw material 010.

[0034] S4, receiving the fourth signal of completion of lofting, controlling the upper locking part 220 to drive the lower beam 510 downward to the fourth preset position. In this step, after lofting is completed (including completion of positioning and clamping), the tool shaft 600 moves downward again to provide a basis for reconnecting its lower end with the lower beam assembly 500.

[0035] S5, receiving the fifth signal indicating that the lower locking part 520 and the tool shaft 600 are locked, controlling the lower linear drive and the upper locking part 220 to move downward and controlling the rotary drive 430 to work until the lower crossbeam 510 reaches the second preset position. In this step, both ends of the tool shaft 600 are fixed and pass through the lead screw nut raw material 010, thereby completing the processing process.

[0036] Repeating the above steps S1 to S5 can complete the batch efficient processing of the screw nuts. The signal of the upper locking part 220 and the tool shaft 600 releasing / locking completion, and the signal of the lower locking part 520 and the tool shaft 600 releasing / locking completion can be sent manually or by related sensors.

[0037] In summary, the tool shaft 600 is fixed by the cooperation of the upper beam assembly 200 and the lower beam assembly 500, and the upper beam assembly 200 and the lower beam assembly 500 work independently, which provides a greater degree of freedom for the fixation of the tool shaft 600 and provides a basis for improving the processing efficiency; the distance between the retainer frame 310 and the upper locking portion 220 of the upper beam 210 is consistent, which ensures that the retainer 320 can always form a high-quality guiding effect with the tool shaft 600, so that the vibration and deformation tendency of the tool shaft 600 are limited, and finally the processing accuracy of the screw nut is improved; by changing the size of the tool shaft 600 and adjusting the corresponding matching parts at the same time, the processing of screw nuts of different models can be realized.

[0038] Reference Figures 2 to 8 In one embodiment, the circumferential walls at both ends of the tool shaft 600 are provided with first inner grooves 610, and the inner walls of the upper locking portion 220 and the lower locking portion 520 are provided with second inner grooves 620 matching the first inner grooves 610. When the tool shaft 600 is combined with the upper locking portion 220 and the lower locking portion 520, the first inner groove 610 and the second inner groove 620 form a channel structure 630 extending to the outer surface of the upper locking portion 220 and the outer surface of the lower locking portion 520.

[0039] In this embodiment, considering that during a processing cycle of a screw nut, the tool shaft 600 needs to be combined / separated with the upper locking portion 220 and the lower locking portion 520, a matching structure that facilitates separation and combination is introduced. Specifically, the overall shape of the upper locking portion 220 and the lower locking portion 520 are both cylindrical, and the two ends of the tool shaft 600 in the length direction are respectively inserted into the upper locking portion 220 and the lower locking portion 520 to form a detachable fixation. The peripheral walls of the two ends of the tool shaft 600 in the length direction are provided with first inner grooves 610. Taking the upper end of the tool shaft 600 in the length direction as an example, the number of the first inner grooves 610 is one or two. When there are two, the two first inner grooves 610 are arranged in parallel. The inner walls of the upper locking part 220 and the lower locking part 520 are provided with a second inner groove 620 matching the first inner groove 610. When the tool shaft 600 is combined with the upper locking part 220 and the lower locking part 520, the first inner groove 610 and the second inner groove 620 form a channel structure 630 extending to the outer surface of the upper locking part 220 and the outer surface of the lower locking part 520. A fixed shaft and a fixed ball can be provided corresponding to the channel structure 630, and the locking and release of the tool shaft 600 can be achieved by installing and removing the fixed shaft and the fixed ball.

[0040] In one embodiment, a locking shaft for controlling the processing portion is telescopically arranged corresponding to the channel structure 630 .

[0041] In the present embodiment, the telescopic structure of the specific locking shaft can be various. For example, a telescopic drive is provided corresponding to the locking shaft, and the locking shaft is connected to the output end of the telescopic drive. The processing unit controls the operation of the telescopic drive, and the type of telescopic drive is preferably pneumatic, which has the advantages of simplicity, convenience and reliability. When the locking shaft is inserted into the channel structure 630, it is locked, and when the locking shaft is separated from the channel structure 630, it is released. It should be noted that if the upper locking part 220 and the lower locking part 520 are set as a chuck-type structure, the structure and control are complex, and the chuck-type structure is easy to cause unnecessary deformation to the tool shaft 600. In the present embodiment, the structure of the locking shaft can be simplified to a large extent, while ensuring low deformation.

[0042] In one embodiment, one of the upper linear drive and the lower linear drive is of pneumatic drive type, and the other is of motor drive type.

[0043] In this embodiment, since only one of the upper linear drive and the lower linear drive can provide a stronger driving force and a higher driving accuracy, one of the upper linear drive and the lower linear drive is a pneumatic linear drive, and the other is a servo motor linear drive, which reduces the overall cost while ensuring the accurate driving of the tool axis 600. In particular, the pneumatic linear drive can provide position adaptability. For example, when the driving strokes of the pneumatic linear drive and the servo motor linear drive are inconsistent, the precise position of the servo motor linear drive can correct the error of the pneumatic linear drive.

[0044] In one embodiment, the upper locking portion 220 and the lower locking portion 520 are provided with a supporting structure corresponding to the tool axis 600 in the height direction.

[0045] In the aforementioned embodiment, both the upper locking portion 220 and the lower locking portion 520 can clamp and fix the tool shaft 600. In this embodiment, in order to improve the stability of the tool shaft 600 in the height direction during operation, the upper locking portion 220 and the lower locking portion 520 are provided with a holding structure corresponding to the tool shaft 600 in the height direction. Then, during operation, the tool shaft 600 is mechanically clamped by the upper locking portion 220 and the lower locking portion 520 in the height direction, thereby ensuring the stability of the tool shaft 600 in the height direction.

[0046] In one embodiment, a robot for loading and unloading is provided corresponding to the clamping assembly 400 .

[0047] In this embodiment, considering that the tool shaft 600 does not need to be replaced during operation except when an abnormality occurs, and the operation of the tool shaft 600 has been optimized to improve production efficiency, it is only necessary to discharge and unload the screw nut raw material 010 and the screw nut product; therefore, a manipulator is introduced to complete the loading and unloading actions, thereby improving the automation of the entire processing process. Specifically, during use, the corresponding manipulator can also be set with a two-dimensional sample table to achieve regular storage of the screw nut raw material 010 and the screw nut product.

[0048] Reference Figure 8 In one embodiment, the retainer 320 includes a plane bearing 321 and a nut portion 322, the plane bearing 321 is relatively rotationally fixed with a base ring 323 and a mounting ring 324, the base ring 323 is connected to the retainer frame 310, the nut portion 322 is mounted on the mounting ring 324, and the shape of the nut portion 322 corresponds to the tool axis 600.

[0049] In this embodiment, the retainer 320 is limited, and the internal thread structure of the nut part 322 is specifically consistent with the structure of the final screw nut, so that smooth rotation can be formed between the nut part 322 and the tool shaft 600. During the operation, when the tool shaft 600 moves upward or downward, the nut part 322 drives the mounting ring 324 of the plane bearing 321 to rotate, and the retainer 320 does not interfere with the movement of the tool shaft 600, while limiting the deformation and vibration of the tool shaft 600.

[0050] In one embodiment, the upper beam 210 is slidably disposed on the optical axis 110 .

[0051] In this embodiment, the position accuracy of the upper crossbeam 210 during the movement process is improved by setting the optical axis 110. There can be two optical axes 110, which are arranged at intervals in the width direction of the base 100 (that is, the length direction of the upper crossbeam 210). A linear bearing structure is arranged at the matching position of the optical axis 110 and the upper crossbeam, thereby improving the guiding function of the optical axis 110.

[0052] The present invention also provides a control method, which is applied to the above-mentioned screw nut processing device, comprising: S1, after receiving the first signal indicating that the upper locking part 220 and the tool shaft 600 have been released, controlling the lower linear drive to drive the lower beam 510 downward to a first preset position; S2, receiving a second signal indicating that sampling is completed, and controlling the lower linear drive to drive the lower beam 510 upward to a second preset position; S3, receiving a third signal indicating that the upper locking portion 220 and the tool shaft 600 are locked, receiving a fourth signal indicating that the lower locking portion 520 and the tool shaft 600 are released, and controlling the lower linear drive to drive the lower beam 510 upward to a third preset position; S4, receiving a fourth signal indicating that the lofting is completed, and controlling the upper locking portion 220 to drive the lower crossbeam 510 downward to a fourth preset position; S5, receiving the fifth signal indicating that the locking of the lower locking part 520 and the tool shaft 600 is completed, and controlling the lower linear drive and the upper locking part 220 to move downward until the lower beam 510 reaches the second preset position.

[0053] In this embodiment, in step S1, after receiving the first signal that the upper locking portion 220 and the tool shaft 600 have been released, the lower linear drive is controlled to drive the lower beam 510 downward to the first preset position. In the previous cycle before this step, the screw nut product has been processed. In this step, the tool shaft 600 is moved downward to provide a basis for removing the screw nut product.

[0054] In step S2, a second signal indicating that sampling is completed is received, and the lower linear drive is controlled to drive the lower beam 510 upward to a second preset position. In this step, after sampling is completed, the tool shaft 600 moves upward again to provide a basis for the upper end of the tool shaft 600 to be connected to the upper beam assembly 200.

[0055] In step S3, a third signal indicating that the upper locking part 220 and the tool shaft 600 are locked is received, and a fourth signal indicating that the lower locking part 520 and the tool shaft 600 are released is received, and the lower linear drive is controlled to drive the lower beam 510 upward to the third preset position. In this step, the tool shaft 600 is only connected to the upper beam assembly 200 and moves upward, providing a basis for the lofting of the screw nut raw material 010.

[0056] In step S4, a fourth signal indicating that the lofting is completed is received, and the upper locking part 220 is controlled to work to drive the lower beam 510 downward to the fourth preset position. In this step, after the lofting is completed (including the completion of the positioning and clamping), the tool shaft 600 moves downward again to provide a basis for its lower end to be reconnected with the lower beam assembly 500.

[0057] In step S5, a fifth signal indicating that the lower locking part 520 and the tool shaft 600 are locked is received, and the lower linear drive and the upper locking part 220 are controlled to move downward and the rotary drive 430 is controlled to work until the lower crossbeam 510 reaches the second preset position. In this step, both ends of the tool shaft 600 are fixed and pass through the lead screw nut raw material 010, thereby completing the processing process.

[0058] Repeating the above steps S1 to S5 can complete the batch efficient processing of the screw nuts. The signal of the upper locking part 220 and the tool shaft 600 releasing / locking completion, and the signal of the lower locking part 520 and the tool shaft 600 releasing / locking completion can be sent manually or by related sensors.

[0059] In one embodiment, the peripheral walls at both ends of the tool shaft 600 are provided with first inner grooves 610, and the inner walls of the upper locking portion 220 and the lower locking portion 520 are provided with second inner grooves 620 matching the first inner grooves 610. When the tool shaft 600 is combined with the upper locking portion 220 and the lower locking portion 520, the first inner groove 610 and the second inner groove 620 form a channel structure 630 extending to the outer surface of the upper locking portion 220 and the outer surface of the lower locking portion 520, and a locking shaft for controlling the processing portion is telescopically provided corresponding to the channel structure 630, and the step S1 includes: Controlling the locking shaft on the upper locking portion 220 to retract outward; The steps between step S2 and step S3 include: Control the locking shaft on the upper locking part 220 to extend inward, and control the locking shaft on the lower locking part 520 to retract outward; The steps between step S4 and step S5 include: The locking shaft on the lower locking portion 520 is controlled to extend inwardly.

[0060] Compared with the aforementioned embodiment, the upper locking portion 220 and the lower locking portion 520 can be manual; in the present embodiment, the operation of the upper locking portion 220 and the lower locking portion 520 is limited to automatic. The telescopic structure of the locking shaft can be various, for example, a telescopic drive is provided corresponding to the locking shaft, and the locking shaft is connected to the output end of the telescopic drive. The processing unit controls the operation of the telescopic drive, and the type of the telescopic drive is preferably pneumatic, which has the advantages of simplicity, convenience and reliability. When the locking shaft is extended into the channel structure 630, it is locked, and when the locking shaft is separated from the channel structure 630, it is released. By controlling the operation of the locking shaft by the processing unit, the degree of automation of the screw nut processing device is improved.

[0061] In one embodiment, a manipulator for loading and unloading is provided corresponding to the clamping assembly 400, and the step S2 includes: receiving a second signal sent by the manipulator indicating that sampling is completed, and controlling the lower linear drive to drive the lower beam 510 upward to a second preset position; The steps of S4 include: A fourth signal indicating that the lofting is completed is received from the manipulator, and the upper locking portion 220 is controlled to work to drive the lower beam 510 downward to a fourth preset position.

[0062] In this embodiment, considering that the tool shaft 600 does not need to be replaced during operation except for abnormalities, and in order to improve production efficiency, the operation of the tool shaft 600 has been optimized, and only the screw nut raw material 010 and the screw nut product need to be discharged and unloaded; therefore, a manipulator is introduced to complete the loading and unloading actions, and the degree of automation of the entire processing process is improved. Specifically, during use, the corresponding manipulator can also be provided with a two-dimensional sample table to realize the regular storage of the screw nut raw material 010 and the screw nut product. The work between the manipulator and the upper beam assembly 200 and the lower beam assembly 500 can be directly coordinated according to a preset program or coordinated through a travel switch type sensor.

[0063] In summary, the screw nut processing device and control method provided by the present invention achieve the fixation of the tool shaft 600 through the cooperation of the upper beam assembly 200 and the lower beam assembly 500, and the upper beam assembly 200 and the lower beam assembly 500 work independently, which provides greater freedom for the fixation of the tool shaft 600 and provides a basis for improving the processing efficiency; the distance between the retainer frame 310 and the upper locking portion 220 of the upper beam 210 is consistent, which ensures that the retainer 320 can always form a high-quality guiding effect with the tool shaft 600, so that the vibration and deformation tendency of the tool shaft 600 are limited, and finally the processing accuracy of the screw nut is improved; by changing the size of the tool shaft 600 and adjusting the corresponding matching parts at the same time, the processing of screw nuts of different models can be realized.

[0064] The above description is only a preferred embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the present invention specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A screw nut processing device, characterized in that: include: A base (100) is provided with a plurality of optical axes (110) in a length direction; An upper crossbeam assembly (200) is arranged on the base (100) and comprises an upper linear drive and an upper crossbeam (210), wherein the upper crossbeam (210) is connected to an output end of the upper linear drive and moves in a vertical direction, and an upper locking portion (220) is arranged on a lower surface of the upper crossbeam (210); A retainer assembly (300) is arranged below the upper crossbeam assembly (200) and comprises a retainer frame (310) and a retainer (320) arranged on the retainer frame (310), wherein the retainer frame (310) is slidably arranged on the optical axis (110) and connected to an output end of the upper linear drive; A clamping assembly (400) is arranged below the retainer assembly (300) and comprises a main shaft (410) and a chuck (420) arranged on the main shaft (410), wherein the main shaft (410) is drivingly connected to a rotation drive (430); A lower crossbeam assembly (500) is arranged below the clamping assembly (400) and comprises a lower linear drive, a lower crossbeam (510), and a lower locking portion (520); the lower crossbeam (510) is driven by the lower linear drive in a vertical direction, and a lower locking portion (520) is provided on an upper surface of the lower crossbeam (510); The tool shaft (600) has two ends in the length direction which are respectively detachably fixed to the upper locking portion (220) and the lower locking portion (520), and processing heads are arranged in an array on the outer wall of the tool shaft (600); a processing unit, controlling the operation of the upper linear drive, the rotational drive (430), the chuck (420) and the lower linear drive; The central axes of the retainer (320), the chuck (420) and the main shaft (410) all penetrate and match the tool shaft (600).

2. The screw nut processing device according to claim 1, characterized in that: The circumferential walls at both ends of the tool shaft (600) are provided with first inner grooves (610), and the inner walls of the upper locking portion (220) and the lower locking portion (520) are provided with second inner grooves (620) matching the first inner grooves (610). When the tool shaft (600) is combined with the upper locking portion (220) and the lower locking portion (520), the first inner groove (610) and the second inner groove (620) form a channel structure (630) extending to the outer surface of the upper locking portion (220) and the outer surface of the lower locking portion (520).

3. The screw nut processing device according to claim 2, characterized in that: A locking shaft for controlling the processing unit is telescopically arranged corresponding to the channel structure (630).

4. The screw nut processing device according to claim 1, characterized in that: One of the upper linear drive and the lower linear drive is a pneumatic drive type, and the other is a motor drive type.

5. The screw nut processing device according to any one of claims 1 to 4, characterized in that: The upper locking portion (220) and the lower locking portion (520) are provided with a supporting structure corresponding to the tool axis (600) in the height direction.

6. The screw nut processing device according to any one of claims 1 to 4, characterized in that: Corresponding to the clamping assembly (400), a manipulator for loading and unloading materials is provided.

7. The screw nut processing device according to any one of claims 1 to 4, characterized in that: The retainer (320) comprises a plane bearing (321) and a nut portion (322), the plane bearing (321) being relatively rotatably fixed with a base ring (323) and a mounting ring (324), the base ring (323) being connected to the retainer frame (310), the nut portion (322) being mounted on the mounting ring (324), and the shape of the nut portion (322) corresponding to the tool shaft (600).

8. A control method, applied to the screw nut processing device according to any one of claims 1 to 7, characterized in that: include: S1, after receiving a first signal indicating that the upper locking portion (220) and the tool shaft (600) have been released, controlling the lower linear drive to drive the lower beam (510) downward to a first preset position; S2, receiving a second signal indicating that sampling is completed, and controlling the lower linear drive to drive the lower beam (510) upward to a second preset position; S3, receiving a third signal indicating that the upper locking portion (220) and the tool shaft (600) are locked, receiving a fourth signal indicating that the lower locking portion (520) and the tool shaft (600) are released, and controlling the lower linear drive to drive the lower beam (510) upward to a third preset position; S4, receiving a fourth signal indicating that the lofting is completed, and controlling the upper locking portion (220) to drive the lower crossbeam (510) downward to a fourth preset position; S5, receiving a fifth signal indicating that the locking of the lower locking portion (520) and the tool shaft (600) is completed, and controlling the lower linear drive and the upper locking portion (220) to move downward until the lower crossbeam (510) reaches a second preset position.

9. The control method according to claim 8, characterized in that: The peripheral walls at both ends of the tool shaft (600) are provided with first inner grooves (610), and the inner walls of the upper locking portion (220) and the lower locking portion (520) are provided with second inner grooves (620) matching the first inner grooves (610). When the tool shaft (600) is combined with the upper locking portion (220) and the lower locking portion (520), the first inner groove (610) and the second inner groove (620) form a channel structure (630) extending to the outer surface of the upper locking portion (220) and the outer surface of the lower locking portion (520). A locking shaft for controlling the processing portion is telescopically provided corresponding to the channel structure (630), and the step S1 includes: Controlling the locking shaft on the upper locking portion (220) to retract outward; The steps between step S2 and step S3 include: Controlling the locking shaft on the upper locking portion (220) to extend inwards, and controlling the locking shaft on the lower locking portion (520) to retract outwards; The steps between step S4 and step S5 include: Controlling the locking shaft on the lower locking portion (520) to extend inward.

10. The control method according to claim 8, characterized in that: A manipulator for loading and unloading materials is provided corresponding to the clamping assembly (400), and the step S2 comprises: receiving a second signal sent by the robot indicating that sampling is completed, and controlling the lower linear drive to drive the lower beam (510) upward to a second preset position; The steps of S4 include: A fourth signal indicating that the lofting is completed is received from the manipulator, and the upper locking portion (220) is controlled to work to drive the lower crossbeam (510) downward to a fourth preset position.

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