Neodymium iron boron processing device and processing method

Abstract

The invention provides a neodymium iron boron machining device and method, and belongs to the technical field of neodymium iron boron machining. A neodymium iron boron machining device comprises a rack, a gear motor is fixedly arranged on the rack, a rotating disc is coaxially fixed to an output shaft of the gear motor, placing holes are evenly distributed in the rotating disc in the circumferential direction, and clamping blocks sliding in the radial direction are evenly distributed on the outer edges of the placing holes in the circumferential direction; two arc-shaped plates are vertically connected to the rack in a sliding mode, a coarse grinding disc and a fine grinding disc are fixedly installed on the opposite inner side faces of the two arc-shaped plates, the fine grinding disc is located at the right ends of arc-shaped notches of the arc-shaped plates, the fine grinding disc is driven by a fine grinding motor, and the two arc-shaped plates are synchronously controlled by a reverse lead screw to vertically and reversely move. The upper surfaces and the lower surfaces of workpieces with different thicknesses can be ground at the same time, the grinding quality is guaranteed, through continuous machining of rough grinding and accurate grinding, the grinding cycle frequency is reduced, and the grinding efficiency is improved.

Description

Technical Field

[0001] The present application relates to the technical field of NdFeB processing, and in particular to a NdFeB processing device and method. Background Art

[0002] As a high-performance permanent magnet material, NdFeB boasts excellent properties such as high magnetic energy product and strong coercivity, making it widely used in high-end manufacturing applications such as new energy vehicles, wind power generation, and medical devices. Its machining accuracy directly impacts the performance of end products, with strict control of surface flatness and dimensional tolerances, in particular, placing extremely high demands on the stability and precision of the machining equipment.

[0003] The vertical double-sided grinding mill is the mainstream equipment for double-sided machining of NdFeB magnets. Its core structure consists of symmetrically arranged grinding discs, a transmission mechanism for the NdFeB workpiece (hereinafter referred to as the workpiece), and a positioning assembly. During operation, the workpiece is fed between the upper and lower grinding discs via the transmission mechanism. The relative rotation of the grinding discs achieves simultaneous double-sided grinding, completing the machining of both upper and lower surfaces in one operation. This machine boasts high efficiency and the ability to achieve continuous batch production, making it a key player in the large-scale machining of NdFeB magnets. However, in practical applications, the machining accuracy and adaptability of vertical double-sided grinding mills still require improvement.

[0004] Reference is made to a Chinese patent document with announcement number CN222627139U and announcement date March 18, 2025, entitled "A device for double-sided grinding", which includes a base, a fixed ring, a lower grinding disc, a driving disc, a movable disc, a pressure plate and an upper grinding disc. A clamping mechanism is provided inside the movable disc, and the clamping mechanism includes a clamping hole, and the clamping hole passes through the movable disc. Clamping blocks are provided on both sides of the clamping hole, and the limiting slider of the rear end plate of the clamping block slides with the inner cavity of the movable disc. Worm gears are rotatably installed on both sides of the inside of the movable disc, and a threaded transmission rod is fixed on the shaft at one end of the worm gear. The threaded transmission rod extends to the limiting slider of the clamping block and frictionally fits with its inner screw hole. A worm is installed on one side of the worm wheel, and the worm is adapted to the worm wheel.

[0005] Referring to the above technical solution, when fixing the workpiece, it is placed between the two clamping blocks, and the staff uses a tool to rotate the adjusting wheel to drive the worm on the lower end shaft to rotate. The rotation of the worm drives the worm wheel to rotate, and then drives the threaded transmission rod to rotate. The inner screw hole of the limit slider at the rear end of the clamping block rubs against the threaded transmission rod, and the guiding effect of the limit slider on the inner cavity of the movable disk is used to realize the movement of the clamping block toward the workpiece, thereby achieving effective fixation of the workpiece. In the actual production process, the upper grinding disc moves downward to grind multiple workpieces at the same time. Due to certain cutting errors in the workpieces, there will be inconsistent thickness. The thin workpiece contacts the lower grinding disc under the action of gravity, while the upper grinding disc cannot contact the upper surface of the thin workpiece due to the height limit of the thick workpiece. During multiple cycles of grinding, the lower surface of the thin workpiece will be over-ground and the upper surface will not be completely ground, which reduces the processing quality and efficiency. Summary of the Invention

[0006] In view of this, the present application provides a NdFeB processing device and method, which can not only grind the upper and lower surfaces of NdFeB workpieces of different thicknesses at the same time to ensure the grinding quality, but also reduce the number of cycles by combining rough grinding and fine grinding to improve the grinding efficiency.

[0007] To solve the above technical problems, in a first aspect, the present application provides a NdFeB processing device, comprising a frame, a reduction motor is fixedly mounted on the frame, a turntable is coaxially fixed to the output shaft of the reduction motor, placement holes are uniformly distributed circumferentially on the turntable, and radially sliding clamping blocks are uniformly distributed circumferentially on the outer edges of the placement holes; Two arc-shaped plates are vertically slidably connected on the frame, and a coarse grinding disc and a fine grinding disc are fixedly mounted on the opposite inner sides of the two arc-shaped plates. The fine grinding disc is located at the right end of the arc-shaped notch of the arc-shaped plate. The fine grinding disc is driven by a fine grinding motor, and the two arc-shaped plates are synchronously controlled by reverse screws to move vertically in opposite directions. The left end of the arc-shaped plate is provided with a guide column for vertical sliding, and the end of the guide column is fixedly provided with a bending plate. A pre-tightening spring is sleeved on the guide column, and the two ends of the pre-tightening spring are respectively in contact with the bending plate and the arc-shaped plate. The frame is provided with a supporting platform vertically corresponding to the placement hole.

[0008] By adopting the above technical solution, when the reduction motor drives the turntable to rotate, the side wall of the placement hole pushes the workpiece to move synchronously with the turntable, and the guide column at the front end of the arc plate is provided with a preloaded spring, so that the bending plate has elastic adjustment ability. When the workpiece enters between the two bending plates, the bending plate adaptively adjusts the vertical position of the workpiece under the elastic force of the preloaded spring to center it, preventing the workpiece with smaller thickness from only contacting the coarse grinding disc below in the initial stage and reducing the grinding quality. The clamping block moves radially to clamp the workpiece, which can straighten the workpiece with an uneven lower surface so that its axis is aligned with the axis of the placement hole. The coarse grinding disc and the fine grinding disc are arranged in sequence along the arc plate, and the workpiece can complete coarse grinding and fine grinding in sequence as the turntable rotates. The workpiece is quickly approached to the preset thickness through coarse grinding, and then the processing quality of the upper and lower surfaces of the workpiece is improved through fine grinding. No secondary clamping is required, which reduces clamping errors and thus improves processing efficiency and precision.

[0009] Optionally, an H-shaped groove is provided on the outer side of the placement hole in a radial direction, the clamping block is slidably connected to the H-shaped groove, the lower surface of the turntable is circumferentially connected to a linkage gear ring, the inner circumference of the linkage gear ring is evenly distributed with arc guide grooves, the clamping block is slidably connected to the inner wall of the arc guide groove, the lower surface of the turntable is circumferentially connected to a rack, the rack is meshed with teeth set on the outer arc surface of the linkage gear ring, and a driving part for driving the rack to move is provided on the frame.

[0010] By adopting the above technical solution, the H-shaped slide groove forms a radial guide for the clamping block, limiting the clamping block to slide only in the radial direction, avoiding skew or offset when the clamping block moves, and ensuring stable movement. The linkage gear ring on the lower surface of the turntable is slidably connected to multiple clamping blocks through circumferentially evenly distributed arc guide grooves. When the linkage gear ring rotates, the inner wall of the arc guide groove will synchronously apply force to all clamping blocks, so that multiple clamping blocks move synchronously in the radial direction, ensuring that the clamping force on the workpiece is evenly distributed, and the rack meshes with the teeth on the outer arc surface of the linkage gear ring. Driven by the driving member, the movement of the rack can stably drive the linkage gear ring to rotate, thereby realizing precise control of the synchronous clamping or release action of multiple clamping blocks, and further improving the reliability of workpiece clamping.

[0011] Optionally, the driving member includes a base mounting plate, which is fixedly mounted on the frame, and an inner disk body and an outer ring body are provided on the upper surface of the base mounting plate, the inner disk body and the outer ring body are coaxially arranged, and a guide groove is formed between the inner disk body and the outer ring body, and a guide wheel is rotatably provided at the end of the rack close to the axis of the turntable, and the guide wheel is slidably connected to the inner wall of the outer ring body.

[0012] By adopting the above technical solution, the guide groove provides a certain motion trajectory for the guide wheel, thereby controlling the radial position of the rack relative to the turntable. Due to the constraint effect of the guide groove, multiple racks are limited at the same time, ensuring the clamping stability while simplifying the structure, facilitating control, and reducing equipment costs.

[0013] Optionally, the outer ring body includes a fixed part and a rotating part, the rotating part is rotatably connected to the base mounting plate through a pin shaft, an electric push rod is rotatably arranged under the base mounting plate through a support shaft, and the actuator end of the electric push rod is rotatably connected to the rotating part through a connecting shaft.

[0014] By adopting the above technical solution, when the electric push rod is extended or retracted, the actuator end of the electric push rod drives the rotating part to rotate around the pin shaft through the connecting shaft, thereby realizing the opening and closing of the rotating part and the fixed part. When the rotating part is opened, the guide groove is in an open state, and the guide wheel constraint is released, which facilitates the resetting of the rack to release the workpiece; when the rotating part is closed, the guide groove forms a closed loop, and the guide wheel is constrained to drive the rack to move, driving the clamp to clamp the workpiece, thereby realizing multiple cycles of grinding for workpieces with large grinding volumes, and switching between clamping and releasing can be achieved without manual operation, thereby improving the degree of automation of the processing process.

[0015] Optionally, a slider cam is provided on the upper surface of the rack, and a dovetail groove with closed ends is provided on the lower surface of the turntable. The slider cam is slidably connected to the inner wall of the dovetail groove, and a return spring is provided inside the dovetail groove. The outer end of the return spring abuts against the side of the slider cam close to the axis of the turntable.

[0016] By adopting the above technical solution, the reset spring always applies an elastic force to the slider cam toward the axis of the turntable. When the rotating part is opened and the constraint of the guide wheel is released, the elastic force of the reset spring pushes the slider cam to move along the dovetail groove, driving the rack to automatically reset, and then driving the linked gear ring to rotate in the opposite direction to release the clamping block from the workpiece. The rack can be reset without the need for additional driving components, which simplifies the release mechanism and ensures the timeliness and accuracy of the release action.

[0017] Optionally, two vertical guide columns are provided on the frame, and the two curved plates are provided with sliding holes adapted to the vertical guide columns. The two curved plates are slidingly connected to the outer curved surfaces of the two vertical guide columns through the sliding holes. A lifting motor is provided on the frame, and the lower end of the output shaft of the lifting motor is fixedly connected to a reverse screw through a coupling, and the two curved plates are threadedly connected to the reverse screw.

[0018] By adopting the above technical solution, the lifting motor drives the reverse screw to rotate through the coupling. Since the threaded connection directions of the two arc plates and the reverse screw are opposite, the rotation of the reverse screw will drive the two arc plates to move in the opposite direction synchronously, and accurately adjust the distance between the two coarse grinding discs and the two fine grinding discs to adapt to workpieces of different thicknesses.

[0019] Optionally, a brush is provided at the left end of each bending plate.

[0020] By adopting the above technical solution, the bristles of the brush are in contact with the upper and lower surfaces of the workpiece respectively, and the surface impurities are cleaned before the workpiece enters the rough grinding area, which can prevent the impurities from being crushed by the grinding disc during the subsequent rough grinding or fine grinding process, and prevent scratches, dents and other defects on the workpiece surface. At the same time, the wear of the grinding disc by impurities is reduced, and the grinding quality is further guaranteed on the basis of the positioning function of the bending plate.

[0021] Optionally, the end of the guide column facing away from the bending plate is threadedly connected with a nut, and the nut abuts against the outer side surface of the corresponding arc plate.

[0022] By adopting the above technical solution, rotating the nut can change the extension length of the guide column relative to the arc plate, thereby adjusting the compression amount of the preload spring, realizing the adjustment of the preload force of the preload spring, and ensuring the centering effect of the workpiece.

[0023] Optionally, a discharge plate is provided on the frame, and the feed port of the discharge plate is arranged vertically corresponding to the right end of the arc plate, so as to discharge the workpieces that fall after processing.

[0024] In a second aspect, the present application provides a NdFeB processing method, which is applied to the NdFeB processing device described in the first aspect. The processing method includes: In step S1, the lifting motor drives the reverse screw to rotate, adjusting the distance between the two curved plates to match the thickness of the workpiece. The actuator of the electric push rod extends, the rotating part and the fixed part open, and the guide slot is in an open state. The reduction motor drives the turntable to rotate, and the workpiece to be processed is placed on the support table through the placement hole on the front side. The side wall of the placement hole pushes the workpiece to rotate synchronously with the turntable. S2: As the turntable rotates, the workpiece is vertically centered under the action of the bending plate. The guide wheel enters the guide groove between the fixed part and the inner disk body under the guidance of the rotating part. At the same time, the rack moves under the drive of the guide wheel and drives the linked gear ring to rotate. The clamp moves radially and clamps the workpiece. S3, controls the actuator of the electric push rod to retract, the rotating part and the fixed part are closed, the guide groove is in a closed loop state, and when the workpiece rotates with the turntable to the coarse grinding disc, the coarse grinding disc performs coarse grinding on the workpiece; when it continues to rotate to the fine grinding disc, the fine grinding motor drives the fine grinding disc to fine grind the workpiece; S4, after the processing is completed, the actuator of the electric push rod extends, driving the rotating part to open, the rack resets under the action of the reset spring, and the linked gear ring rotates in the opposite direction to release the clamping block and the workpiece is unloaded through the unloading plate.

[0025] By adopting the above technical solution, the clamping block and the bending plate cooperate to achieve central clamping of the workpiece, so that the axis of the workpiece is collinear with the axis of the placement hole, avoiding affecting the processing accuracy due to the tilt of the lower surface of the workpiece or inconsistent thickness.

[0026] In summary, compared with the prior art, this application has at least one of the following beneficial technical effects: 1. When the workpiece enters between the two bending plates, the bending plates adaptively adjust the vertical position of the workpiece under the elastic force of the preloaded spring to center it. The clamping block moves radially to clamp the workpiece. The clamping block and the bending plate cooperate to achieve adaptive centering clamping of the workpiece, avoiding single-sided contact of the thin workpiece with the grinding disc, ensuring the processing quality of the upper and lower surfaces, and reducing clamping errors.

[0027] 2. The coarse grinding disc and the fine grinding disc are set in sequence. The workpiece is continuously coarsely ground and finely ground as the turntable rotates. No secondary clamping is required, which improves processing efficiency and accuracy.

[0028] 3. The electric push rod controls the opening and closing of the rotating part, and cooperates with the reset spring to realize automatic clamping and release of the clamping block. The clamping force is uniform, and single processing and cycle processing can be selected according to processing requirements to improve the degree of automation. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 This is a schematic structural diagram of a NdFeB processing device for this application; Figure 2 A schematic diagram of the right side structure of the NdFeB processing device is shown for this application; Figure 3 For this application Figure 2 Schematic diagram of the enlarged structure of area A in the middle; Figure 4 This is a schematic diagram of the right side cross-sectional structure of the rack of this application; Figure 5 This is a schematic diagram of the cross-sectional structure of the linkage gear ring of this application when viewed from above; Figure 6 This is a schematic diagram of the top cross-sectional structure of the driving component of this application; Figure 7 This is a right-side structural diagram of the turntable of this application; Figure 8 This is a schematic diagram of the top view of the rack of this application.

[0030] Explanation of Reference Numerals: 1. Frame; 2. Rotary Clamping Mechanism; 21. Reducer Motor; 22. Turntable; 221. Placement Hole; 222. H-Shaped Slide Groove; 223. Dovetail Groove; 23. Linking Gear Ring; 231. Arc-Shaped Guide Groove; 232. Tooth; 24. Rack; 241. Slider Key; 25. Clamping Block; 26. Return Spring; 3. Driving Component; 31. Base Mounting Plate; 32. Inner Disc; 33. Outer Ring; 331. Fixing Portion; 332. Rotating part; 34. Guide groove; 35. Guide wheel; 36. Electric push rod; 4. Grinding assembly; 41. Arc plate; 411. Arc notch; 42. Rough grinding disc; 43. Fine grinding disc; 44. Fine grinding motor; 5. Driving mechanism; 51. Lifting motor; 52. Reverse screw; 53. Vertical guide column; 6. Guide column; 7. Bending plate; 8. Preload spring; 9. Nut; 10. Brush; 11. Support platform; 12. Unloading plate. DETAILED DESCRIPTION

[0031] The following is a summary of the embodiments of this application. Figures 1-8 , clearly and completely describes the technical solutions of the embodiments of this application. Obviously, the described embodiments are part of the embodiments of this application, not all of them. Based on the described embodiments of this application, all other embodiments obtained by ordinary technicians in this field fall within the scope of protection of this application.

[0032] In the first aspect, the present application provides a NdFeB processing device, which adopts the following technical solution: Reference Figure 1 and Figure 2 This embodiment provides a NdFeB processing device, comprising a frame 1, a rotary clamping mechanism 2 for clamping a workpiece, a grinding assembly 4 for performing multi-stage grinding on the workpiece, and a drive mechanism 5 for vertically driving the grinding assembly 4. The drive mechanism 5 is mounted on the frame 1. The frame 1 is also provided with a stripper plate 12. The feed opening of the stripper plate 12 is aligned vertically with the right end of the curved plate 41, facilitating the discharge of the processed workpiece.

[0033] Reference Figure 2 and Figure 5The rotating clamping mechanism 2 includes a reduction motor 21, a turntable 22, a linkage gear ring 23 and a rack 24. The reduction motor 21 is arranged on the frame 1, and the turntable 22 is coaxially fixed to the output shaft of the reduction motor 21. The turntable 22 is evenly provided with placement holes 221 in the circumferential direction, and an H-shaped slide groove 222 is provided on the outer side of the placement hole 221 in the radial direction. A clamping block 25 is slidably provided on the H-shaped slide groove 222, and the linkage gear ring 23 is rotatably connected to the lower surface of the turntable 22. The inner circumference of the linkage gear ring 23 is evenly distributed with arc guide grooves 231, and the clamping block 25 is slidably connected to the inner wall of the arc guide groove 231. The arc guide groove 231 is an eccentric arc structure, and its distance from the center of the linkage gear ring 23 gradually changes along the circumferential direction; when the linkage gear ring 23 rotates, the inner wall of the arc guide groove 231 squeezes the clamping block 25, driving the clamping block 25 to slide radially along the H-shaped slide groove 222 close to or away from the center of the placement hole 221. The rack 24 is circumferentially slidably connected to the lower surface of the turntable 22 , and is meshed with teeth 232 provided on the outer arc surface of the linkage gear ring 23 . A driving member 3 for driving the rack 24 to move is provided on the frame 1 .

[0034] During processing, the reduction motor 21 drives the turntable 22 to rotate at a low speed, and drives the linked gear ring 23 to rotate by controlling the rack 24 to slide relative to the turntable 22; since the clamping block 25 is slidingly connected to the H-shaped slide groove 222 and the arc-shaped guide groove 231 respectively, when the H-shaped slide groove 222 and the arc-shaped guide groove 231 rotate relative to each other, the clamping block 25 will be driven to move radially, thereby clamping or releasing the workpiece in the placement hole 221.

[0035] Reference Figure 6 The driving member 3 includes a base mounting plate 31, an inner disk body 32 and an outer ring body 33. The base mounting plate 31 is fixedly set on the frame 1. The inner disk body 32 and the outer ring body 33 are coaxially arranged on the base mounting plate 31. A guide groove 34 is formed between the outer arc surface of the inner disk body 32 and the inner wall surface of the outer ring body 33. A guide wheel 35 is rotatably provided at the end of the rack 24 close to the axis of the turntable 22. The guide wheel 35 is slidably connected to the inner wall of the outer ring body 33. The guide groove 34 controls the position of the rack 24 relative to the turntable 22 by limiting the guide wheel 35.

[0036] Reference Figure 6 The outer ring body 33 includes a fixed part 331 and a rotating part 332. The rotating part 332 is rotatably connected to the base mounting plate 31 through a pin shaft. An electric push rod 36 is rotatably connected to the base mounting plate 31 through a support shaft. The actuator end of the electric push rod 36 is rotatably connected to the rotating part 332 through a connecting shaft. By controlling the opening and closing of the rotating part 332, the clamping block 25 can clamp or release the workpiece.

[0037] Reference Figure 7 and Figure 8A slider cam 241 is provided on the upper surface of the rack 24, and a dovetail groove 223 with closed ends is provided on the lower surface of the turntable 22. The slider cam 241 is slidably connected to the inner wall of the dovetail groove 223, and a return spring 26 is provided inside the dovetail groove 223. The outer end of the return spring 26 abuts against the side of the slider cam 241 close to the axis of the turntable 22. The return spring 26 applies pressure to the rack 24 through the slider cam 241, so that the rack 24 slides automatically when the rotating part 332 is opened, thereby releasing the clamping of the workpiece.

[0038] The specific clamping process is as follows: the actuator of the electric push rod 36 is in an extended state. At this time, the end of the rotating part 332 and the fixed part 331 are not closed, the guide groove 34 is in an open state, and the turntable 22 drives the rack 24 to rotate along the axis of the turntable 22. During the rotation, the workpiece to be ground is placed on the supporting platform 11 through the frontmost placement hole 221. The side wall of the placement hole 221 pushes the workpiece to rotate clockwise. At the same time, the rotating part 332 guides the guide wheel 35 so that the guide wheel 35 enters between the fixed part 331 and the inner disk body 32. During this process, the rack 24 drives the rotating ring to rotate, switching the workpiece from a release state to a clamping state.

[0039] Reference Figure 4 The driving mechanism 5 includes a lifting motor 51, a vertical guide column 53 and a reverse screw 52. The lifting motor 51 is arranged on the frame 1. The reverse screw 52 is fixed to the lower end of the output shaft of the lifting motor 51 through a coupling. The grinding assembly 4 is synchronously controlled by the reverse screw 52 to move vertically in the reverse direction. The vertical guide column 53 is fixed on the frame 1 and is used to limit and guide the grinding assembly 4.

[0040] Reference Figure 1 and Figure 4 The grinding assembly 4 includes an arc-shaped plate 41, a coarse grinding disc 42 and a fine grinding disc 43. The arc-shaped plates 41 are respectively slidably connected to the outer arc surfaces of the two vertical guide pillars 53. The two ends of the reverse screw 52 are provided with thread segments with opposite rotation directions. The two arc-shaped plates 41 are respectively threadedly connected with the thread segments with different rotation directions. When the reverse screw 52 rotates, the two arc-shaped plates 41 are driven to move synchronously in opposite directions along the vertical guide pillars 53. There are two coarse grinding discs 42 and they are respectively fixedly mounted on the opposite inner sides of the two arc-shaped plates 41. The right ends of the two arc-shaped plates 41 are respectively provided with fine grinding motors 44, and the fine grinding discs 43 are respectively fixedly mounted on the output shafts of the fine grinding motors 44.

[0041] The lifting motor 51 drives the reverse screw 52 to rotate, adjusts the spacing between the two arc plates 41, and then controls the distance between the grinding surfaces of the two rough grinding discs 42. During processing, the side wall of the placement hole 221 drives the workpiece to rotate between the two rough grinding discs 42. The positions of the two rough grinding discs 42 are fixed. When the workpiece rotates, the position is offset relative to the rough grinding disc 42. The relative position of the workpiece and the rough grinding disc 42 is moved to grind and remove burrs, ridges and bevels on the upper and lower surfaces of the workpiece, reducing the processing amount required for the fine grinding process and avoiding the situation where multiple cycles of processing are required due to excessive single grinding amount. This indirectly improves the overall processing efficiency and creates conditions for ensuring the final accuracy of the fine grinding process. When the workpiece rotates clockwise to the right end of the arc plate 41, the fine grinding motor 44 drives the fine grinding disc 43 to rotate at high speed, finely grinding the rough-ground surface to improve the grinding accuracy.

[0042] Reference Figure 1 、 Figure 2 and Figure 3 The left end of the curved plate 41 is vertically slidably provided with a guide column 6, and the end of the guide column 6 is fixedly provided with a bending plate 7. A pre-tightening spring 8 is sleeved on the guide column 6, and the two ends of the pre-tightening spring 8 are respectively abutted against the bending plate 7 and the curved plate 41. The end of the guide column 6 away from the bending plate 7 is threadedly connected with a nut 9, and the nut 9 is abutted against the outer side surface of the corresponding curved plate 41. Rotating the nut 9 can change the extension length of the guide column 6, and then adjust the compression amount of the pre-tightening spring 8 to adapt to workpieces of different sizes.

[0043] The pre-tightening spring 8 applies a vertical pre-tightening force to the bending plate 7, so that the distance between the two bending plates 7 is slightly smaller than the thickness of the workpiece. When the workpiece is placed on the supporting platform 11 through the placement hole 221, the side wall of the placement hole 221 drives the workpiece to rotate. At this time, the workpiece is lifted upward under the guidance of the inclined surface of the bending plate 7 below, and at the same time is centered under the restriction of the bending plate 7 above (the gravity of the workpiece can be ignored relative to the elastic force of the pre-tightening spring 8). As the turntable 22 continues to rotate, the clamping block 25 clamps the workpiece and transports it between the two rough grinding discs 42 for rough grinding.

[0044] By centering and clamping the workpiece, it is possible to avoid excessive grinding of the lower surface of the thinner workpiece due to continuous contact with the lower grinding disc due to gravity when grinding a thicker workpiece. At the same time, it can prevent the workpiece from vibrating and tilting due to the large size of the placement hole 221 during high-speed fine grinding, thereby improving the processing yield.

[0045] In addition, if multiple rounds of grinding are required on the workpiece, the actuator of the electric push rod 36 is kept in a retracted state so that the rotating part 332 and the fixed part 331 are closed. At this time, the clamping block 25 continues to clamp the workpiece to prevent the workpiece from falling at the arc-shaped notch 411 of the arc plate 41, thereby expanding the scope of application of the device.

[0046] Reference Figure 2 and Figure 3 A brush 10 is provided at the left end of the bending plate 7. The bristles of the brush 10 are in contact with the upper and lower surfaces of the workpiece respectively. Before the workpiece enters between the two coarse grinding discs 42, the brush 10 automatically cleans the foreign particles adhering to the surface of the workpiece to avoid affecting the grinding effect.

[0047] The implementation principle of the NdFeB processing device in the embodiment of the present application is as follows: During loading, the lifting motor 51 first drives the reverse screw 52, ​​causing the two curved plates 41 to slide in opposite directions along the vertical guide posts 53, adjusting the spacing to accommodate the workpiece thickness. Simultaneously, the electric push rod 36 extends, pushing the rotating portion 332 of the outer ring 33 open, leaving the guide groove 34 formed by the inner and outer rings 32 and 33 open. The reduction motor 21 then activates, driving the turntable 22 to rotate at a constant speed. The operator then places the workpiece to be processed onto the corresponding support platform 11 through the placement hole 221 at the front of the turntable 22. The sidewalls of the placement hole 221 push the workpiece to rotate synchronously with the turntable 22.

[0048] When the workpiece rotates with the turntable 22 to the front end of the curved plate 41, the workpiece is automatically vertically centered under the guiding action of the inclined surface of the bending plate 7 and the elastic force of the preloaded spring 8 on the guide column 6, preventing position deviation. The brush 10 on the left end of the bending plate 7 simultaneously cleans impurities on the surface of the workpiece to ensure the quality of subsequent grinding. At the same time, the guide wheel 35 at the end of the rack 24, guided by the rotating portion 332, enters the guide groove 34 formed by the inner disk body 32 and the fixed portion 331 of the outer ring body 33, driving the rack 24 to slide along the dovetail groove 223 on the lower surface of the turntable 22. The rack 24 engages with the teeth 232 on the outer curved surface of the linkage gear ring 23, driving the linkage gear ring 23 to rotate. The arc-shaped guide groove 231 inside the linkage gear ring 23 and the H-shaped slide groove outside the placement hole 221 produce relative displacement, prompting the clamp 25 to move radially and clamp the workpiece.

[0049] The actuator of the electric push rod 36 then contracts, pulling the rotating portion 332 and the fixed portion 331 together, and the guide slot 34 forms a closed loop. The workpiece continues to rotate along the turntable 22 to the coarse grinding disc 42. The coarse grinding disc 42 on the inner side of the two curved plates 41 performs a preliminary grinding on the workpiece, quickly approaching the preset thickness. When the workpiece continues to rotate to the right end of the curved plate 41, the fine grinding motor 44 drives the fine grinding disc 43 to rotate at high speed, finely grinding the workpiece and improving the surface accuracy.

[0050] After the processing is completed, the electric push rod 36 actuator extends again, the rotating part 332 opens, and the guide groove 34 returns to the open state; the rack 24 is reset under the elastic force of the reset spring 26 in the dovetail groove 223, driving the linked gear ring 23 to rotate in the opposite direction, so that the clamping block 25 retreats radially and releases the workpiece; under the action of gravity, the workpiece falls to the unloading plate 12 vertically corresponding to the right end of the arc plate 41, and is discharged along the unloading plate 12, completing the entire processing and unloading process.

[0051] In a second aspect, the present application provides a NdFeB processing method, which is applied to a NdFeB processing device according to the first aspect. The processing method includes: S1: The lifting motor 51 drives the reverse screw 52 to rotate, adjusting the distance between the two curved plates 41 to match the thickness of the workpiece. The actuator of the electric push rod 36 extends, the rotating portion 332 and the fixed portion 331 open, and the guide slot 34 is in an open state. The reduction motor 21 drives the turntable 22 to rotate, and the workpiece to be processed is placed on the support platform 11 through the placement hole 221 at the front. The side wall of the placement hole 221 pushes the workpiece to rotate synchronously with the turntable 22. S2, as the turntable 22 rotates, the workpiece is vertically centered under the action of the bending plate 7. The guide wheel 35, guided by the rotating part 332, enters the guide groove 34 between the fixed part 331 and the inner disk body 32. The rack 24 moves under the drive of the guide wheel 35 and drives the linked gear ring 23 to rotate. The clamping block 25 moves radially and clamps the workpiece. S3, the actuator of the electric push rod 36 is controlled to retract, the rotating part 332 and the fixed part 331 are closed, the guide groove 34 is in a closed loop state, and when the workpiece rotates with the turntable 22 to the coarse grinding disc 42, the coarse grinding disc 42 performs coarse grinding on the workpiece; when it continues to rotate to the fine grinding disc 43, the fine grinding motor 44 drives the fine grinding disc 43 to fine grind the workpiece; S4, after the processing is completed, the actuator of the electric push rod 36 extends, driving the rotating part 332 to open, the rack 24 is reset under the action of the reset spring 26, and the linked gear ring 23 rotates in the opposite direction to make the clamping block 25 release the workpiece, and the workpiece is discharged through the unloading plate 12.

[0052] In addition, in the description of this application, the terms "install", "connect", "connect", and "set" should be understood in a broad sense. For those skilled in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

Claims

1. A NdFeB processing device, characterized in that: include: A frame (1), wherein a reduction motor (21) is fixedly provided on the frame (1), a turntable (22) is coaxially fixed to the output shaft of the reduction motor (21), placement holes (221) are uniformly distributed circumferentially on the turntable (22), and radially sliding clamping blocks (25) are uniformly distributed circumferentially on the outer edges of the placement holes (221); Two arc-shaped plates (41) are vertically slidably connected to the frame (1), and a coarse grinding disc (42) and a fine grinding disc (43) are fixedly mounted on opposite inner sides of the two arc-shaped plates (41), and the fine grinding disc (43) is located at the right end of the arc-shaped notch (411) of the arc-shaped plate (41). The fine grinding disc (43) is driven by a fine grinding motor (44), and the two arc-shaped plates (41) are synchronously controlled by a reverse screw (52) to move in opposite directions vertically; The left end of the arc plate (41) is provided with a guide column (6) for vertical sliding, and the end of the guide column (6) is fixedly provided with a bending plate (7). A preload spring (8) is sleeved on the guide column (6), and the two ends of the preload spring (8) are respectively in contact with the bending plate (7) and the arc plate (41). The frame (1) is provided with a supporting platform (11) vertically corresponding to the placement hole (221).

2. The NdFeB processing device according to claim 1, characterized in that: An H-shaped slide groove (222) is provided on the outer side of the placement hole (221) in a radial direction, the clamping block (25) is slidably connected to the H-shaped slide groove (222), the lower surface of the turntable (22) is circumferentially connected to a linkage gear ring (23), the inner circumference of the linkage gear ring (23) is uniformly distributed with arc guide grooves (231), the clamping block (25) is slidably connected to the inner wall of the arc guide groove (231), the lower surface of the turntable (22) is circumferentially connected to a rack (24), the rack (24) is meshed with teeth (232) provided on the outer arc surface of the linkage gear ring (23), and a driving member (3) for driving the rack (24) to move is provided on the frame (1).

3. The NdFeB processing device according to claim 2, characterized in that: The driving member (3) includes a base mounting plate (31), the base mounting plate (31) is fixedly arranged on the frame (1), an inner disc body (32) and an outer ring body (33) are arranged on the upper surface of the base mounting plate (31), the inner disc body (32) and the outer ring body (33) are coaxially arranged, and a guide groove (34) is formed between the inner disc body (32) and the outer ring body (33), and a guide wheel (35) is rotatably arranged at the end of the rack (24) close to the axis of the turntable (22), and the guide wheel (35) is slidably connected to the inner side wall of the outer ring body (33).

4. The NdFeB processing device according to claim 3, characterized in that: The outer ring body (33) includes a fixed portion (331) and a rotating portion (332), the rotating portion (332) being rotatably connected to the base mounting plate (31) via a pin shaft, an electric push rod (36) being rotatably provided below the base mounting plate (31) via a support shaft, and an actuator end of the electric push rod (36) being rotatably connected to the rotating portion (332) via a connecting shaft.

5. The NdFeB processing device according to claim 4, characterized in that: The upper surface of the rack (24) is provided with a slider cam (241), and the lower surface of the turntable (22) is provided with a dovetail groove (223) with closed ends. The slider cam (241) is slidably connected to the inner wall of the dovetail groove (223), and a return spring (26) is provided inside the dovetail groove (223). The outer end of the return spring (26) abuts against the side of the slider cam (241) close to the axis of the turntable (22).

6. A NdFeB processing device according to any one of claims 1 to 5, characterized in that: Two vertical guide columns (53) are provided on the frame (1), and the two arc-shaped plates (41) are each provided with a sliding hole adapted to the vertical guide columns (53). The two arc-shaped plates (41) are slidably connected to the outer arc surfaces of the two vertical guide columns (53) through the sliding holes. A lifting motor (51) is provided on the frame (1), and the lower end of the output shaft of the lifting motor (51) is fixedly connected to a reverse screw (52) through a coupling. The two arc-shaped plates (41) are both threadedly connected to the reverse screw (52).

7. The NdFeB processing device according to claim 1, characterized in that: The left end of each bending plate (7) is provided with a brush (10).

8. The NdFeB processing device according to claim 1, characterized in that: A discharge plate (12) is provided on the frame (1), and a feed port of the discharge plate (12) is vertically arranged corresponding to the right end of the arc-shaped plate (41).

9. The NdFeB processing device according to claim 1, characterized in that: The end of the guide column (6) facing away from the bending plate (7) is threadedly connected to a nut (9), and the nut (9) abuts against the outer side surface of the corresponding arc-shaped plate (41).

10. A NdFeB processing method, applied to the NdFeB processing device according to claim 6, characterized in that: include: S1, the lifting motor (51) drives the reverse screw (52) to rotate, adjusts the distance between the two arc plates (41) to match the thickness of the workpiece, the actuator of the electric push rod (36) extends, the rotating part (332) and the fixed part (331) are opened, and the guide groove (34) is in an open state; the reduction motor (21) drives the turntable (22) to rotate, and the workpiece to be processed is placed on the support table (11) through the placement hole (221) at the front side, and the side wall of the placement hole (221) pushes the workpiece to rotate synchronously with the turntable (22); S2, as the turntable (22) rotates, the workpiece is vertically centered under the action of the bending plate (7), and the guide wheel (35) enters the guide groove (34) between the fixed part (331) and the inner disk body (32) under the guidance of the rotating part (332). At the same time, the rack (24) moves under the drive of the guide wheel (35) and drives the linkage gear ring (23) to rotate, and the clamping block (25) moves radially and clamps the workpiece; S3, the actuator of the electric push rod (36) is controlled to retract, the rotating part (332) and the fixed part (331) are closed, the guide groove (34) is in a closed loop state, and when the workpiece rotates with the turntable (22) to the coarse grinding disc (42), the coarse grinding disc (42) performs coarse grinding on the workpiece; when the workpiece continues to rotate to the fine grinding disc (43), the fine grinding motor (44) drives the fine grinding disc (43) to fine grind the workpiece; S4, after the processing is completed, the actuator of the electric push rod (36) extends, driving the rotating part (332) to open, the rack (24) is reset under the action of the reset spring (26), and the linked gear ring (23) rotates in the opposite direction to release the clamping block (25) and the workpiece is discharged through the unloading plate (12).

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