Special-shaped neodymium-iron-boron polishing device

Abstract

The application provides a special-shaped neodymium-iron-boron polishing device, and belongs to the technical field of neodymium-iron-boron processing. The device comprises a workbench, a mounting seat fixedly arranged on the workbench, an X-axis displacement assembly assembled on the mounting seat, a support frame connected to the execution end of the X-axis displacement assembly, a Y-axis displacement assembly assembled on one side of the support frame, a connecting seat connected to the execution end of the Y-axis displacement assembly, a Z-axis displacement assembly assembled on the connecting seat, a first spindle box fixedly connected to the execution end of the Z-axis displacement assembly, a grinding head connected to the output end of the first spindle box, and a fourth motor drivingly connected to the power input end of the grinding head. A second spindle box corresponding to the position of the first spindle box is fixedly arranged on the workbench, and a disc is coaxially fixedly connected to the output end of the second spindle box. The device eliminates the cumbersome steps of workpiece overturning, reloading and secondary positioning in the traditional process, greatly shortens the single-batch processing period, and effectively improves the batch production efficiency of the arc-shaped neodymium-iron-boron workpiece.

Description

TECHNICAL FIELD

[0001] The application relates to the neodymium iron boron processing technology field, in particular to a special-shaped neodymium iron boron polishing device. BACKGROUND

[0002] The neodymium iron boron magnet is a third-generation rare earth permanent magnet material taking neodymium, iron and boron as main components and a small amount of rare earth elements or transition metals as modified components. The magnetic energy product index of the neodymium iron boron magnet is in the leading level among existing permanent magnet materials, has the core characteristics of high coercivity and high remanence, and has the technical advantages of compact volume, light weight and low unit magnetic force cost. The neodymium iron boron magnet can stably output strong magnetic force under various working conditions and has become a commonly used permanent magnet functional material in the modern industrial field.

[0003] The conventional production process of the neodymium iron boron magnet mainly includes basic processes such as batching, vacuum smelting, powdering, pressing forming and sintering densification. The sintered blank needs to be processed after processing to meet the actual application requirements, and polishing is an important post-processing step. The process is usually realized by using diamond grinding wheel grinding and precision grinding processes. The main function is to correct the size deviation of the blank, ensure that the flatness, perpendicularity and other form and position tolerances of the product meet the design standards, and remove the surface oxidation layer and machining burrs to improve the surface finish. The machining precision of the polishing process is directly related to the assembly adaptability, magnetic force transmission effect and service stability of the neodymium iron boron magnet.

[0004] Referring to the Chinese patent document with the publication number CN217255152U and the name of high-temperature-resistant sintered neodymium iron boron product polishing device, it comprises a main frame, a polishing platform, a coaming, a top plate, a clamping device, a polishing disc and a polishing motor. The polishing motor is fixed on both sides of the polishing motor. The outer end of the supporting rod is fixed with a lifting screw sleeve. The lifting screw sleeve is provided with a lifting screw. The lifting motor is fixed on the top plate. The clamping device comprises a placing plate. The placing plate is provided with a mounting cavity. The top of the mounting cavity is provided with an opening. The mounting cavity is provided with a clamping screw. The clamping screw is provided with threads with opposite rotation directions. The clamping screw is provided with an adjusting screw sleeve. The top of the adjusting screw sleeve is fixed with a connecting block. The connecting block is fixed with a clamping plate. The file rotates the hand-operated turntable to drive the clamping screw to rotate, thereby driving the adjusting screw sleeves on both sides to move towards the middle at the same time, so that the clamping plate clamps the neodymium iron boron for processing work.

[0005] The technical scheme has the advantages that the workpiece clamping operation is convenient, and the workpiece can be quickly positioned and clamped, but the polishing device has obvious adaptability limitations for the polishing of the arc-shaped Nd-Fe-B magnet workpiece. Since the workpiece has two curved surfaces to be processed, namely, an inner arc surface and an outer arc surface, the clamping and polishing structure of the prior art can only process one curved surface (the inner arc surface or the outer arc surface) at a time. After the polishing of a single curved surface is completed, the workpiece needs to be disassembled from the clamping mechanism, manually flipped to switch the curved surface to be processed, reinstalled in the clamping mechanism, and positioned and calibrated again. The operation process is not only complicated, but also requires additional time for disassembly, flipping, reinstallation, and secondary positioning, and the repeated positioning is prone to error accumulation, which eventually leads to an increase in the overall processing period, a low production efficiency of the polishing operation, and difficulty in meeting the high production efficiency requirement in the batch processing scenario. SUMMARY

[0006] Therefore, the application provides an irregularly-shaped Nd-Fe-B polishing device, which is mainly used to solve the problem that the irregularly-shaped Nd-Fe-B polishing device can only process a single curved surface at a time, needs to be disassembled, flipped, reinstalled, and positioned again, and has a low production efficiency for the arc-shaped Nd-Fe-B magnet workpiece with inner and outer arc surfaces.

[0007] To solve the above technical problems, the application provides an irregularly-shaped Nd-Fe-B polishing device, which comprises a workbench, a mounting seat fixedly arranged on the workbench, an X-axis displacement assembly assembled on the mounting seat, a support frame connected to an execution end of the X-axis displacement assembly, a Y-axis displacement assembly assembled on one side of the support frame, a connecting seat connected to an execution end of the Y-axis displacement assembly, a Z-axis displacement assembly assembled on the connecting seat, a first spindle box fixedly connected to an execution end of the Z-axis displacement assembly, a grinding head connected to an output end of the first spindle box, and a fourth motor transmissionally connected to a power input end of the grinding head.

[0008] By adopting the above technical scheme, the Nd-Fe-B workpieces are placed one by one into the corresponding placing grooves of the disc, and then the screws on the protrusions are tightened to press and fix the workpieces by the ring pressing plate; during operation, the X-axis displacement assembly, the Y-axis displacement assembly and the Z-axis displacement assembly act in coordination to adjust the spatial position of the grinding head on the first spindle box, that is, the grinding head is first moved to the corresponding position inside the ring pressing plate to synchronously grind the inner arc surfaces of all the workpieces, and then the grinding head is moved to the corresponding position outside the ring pressing plate by the three-axis displacement assembly without disassembling the workpieces to continue to synchronously grind the outer arc surfaces of all the workpieces. The entire operation does not require workpiece overturning, reassembly and secondary positioning, is labor-saving and fast, can synchronously process multiple workpieces at a time, greatly improves the grinding efficiency of the arc-shaped Nd-Fe-B workpieces, and is suitable for large-batch production requirements.

[0009] Optionally, the side of the disc away from the grinding head is movably provided with a ring frame, a plurality of connecting rods are fixedly connected on the ring frame in a circumferential direction and at intervals, one end of each connecting rod penetrates the disc along the axial direction of the disc and is fixedly connected with a limiting ring; a positioning piece corresponding to the placing groove is fixedly arranged on the ring frame, and a through hole corresponding to the placing groove is formed on the disc, and one end of the positioning piece is movably inserted into the corresponding through hole; a limiting assembly is arranged on the disc to limit the ring frame so that the ring frame and the disc maintain different distances.

[0010] By adopting the above technical scheme, when the inner side surface of the Nd-Fe-B workpiece is ground, the limiting ring will abut against the outer side surface of the workpiece to form a lateral auxiliary limiting, effectively preventing the workpiece from being displaced or shaken due to cutting force during grinding; similarly, when the outer side surface of the workpiece is ground, the positioning piece, i.e., the fixed plate and the positioning plate, will extend into the inner side of the workpiece through the through hole on the disc to provide rigid support for the inner side surface of the workpiece, ensuring that the workpiece always maintains a stable posture, and further ensuring the grinding accuracy and surface quality of the inner and outer arc surfaces. In addition, during the workpiece installation stage, the operator places the Nd-Fe-B workpieces one by one into the corresponding placing grooves of the disc, and the limiting ring will immediately form a bottom pre-support and lateral positioning for each workpiece without the need for workers to hold and align the workpieces throughout the process; after all the workpieces are placed in position, the screws on the protrusions are tightened to drive the ring pressing plate to uniformly press and fix all the workpieces, and the entire clamping process does not require individual positioning and fixing, which is simple, efficient, time-saving and labor-saving.

[0011] Optionally, the limiting assembly has two groups, and the two groups of limiting assemblies are symmetrically arranged on the disc; the positioning member includes a fixed plug plate and a positioning plug plate, the total number of the fixed plug plate and the positioning plug plate is consistent with the number of the placing grooves, the positioning plug plate is provided in two, and the two positioning plug plates are arranged in one-to-one correspondence with the two groups of limiting assemblies; the limiting assembly includes a mounting block, a plug rod, a spring, and an end block, the plug rod is movably inserted into the inside of the mounting block, the end block is fixedly arranged at the end of the plug rod, the spring is sleeved on the outside of the plug rod, one end of the spring is fixedly connected with the mounting block, and the other end of the spring is fixedly connected with the end block; the positioning plug plate is provided with a first plug hole and a second plug hole matched with the plug rod.

[0012] By means of the above technical scheme, the ring frame is bidirectionally limited by the symmetrically arranged limiting assemblies, so that the stress on both sides of the ring frame is always balanced, the deflection and shaking of the ring frame when it rotates at high speed or bears the impact of polishing and cutting force are effectively avoided, the overall operation state is more stable and reliable, and the polishing precision of the workpiece is continuously guaranteed.

[0013] Optionally, the end block is provided with a T-shaped slot, a clamping block is movably inserted into the inside of the T-shaped slot, the disc is provided with a plug slot matched with the clamping block, and the clamping block cooperates with the plug slot to lock the position of the end block.

[0014] By means of the above technical scheme, when the limiting constraint of the ring frame by any one group of limiting assemblies is released, the clamping block on the end block of the limiting assembly is pushed along the T-shaped slot of the end block, so that the clamping block is accurately inserted into the corresponding plug slot of the disc, and the end block can be reliably locked; after locking, it is not necessary for the staff to manually continuously hold the end block or apply external force to maintain the unlocked state, fatigue caused by continuous force application during operation is effectively avoided, and the whole operation procedure is simple, intuitive, convenient, and labor-saving.

[0015] Optionally, the side of the protrusion close to the ring pressing plate is fixedly connected with a connecting piece, the side of the ring pressing plate close to the protrusion is fixedly connected with a locking piece matched with and matched with the connecting piece in one-to-one correspondence, and the connecting piece cooperates with the locking piece to realize the pre-positioning of the ring pressing plate.

[0016] By means of the above technical scheme, when the ring pressing plate is installed, it is first aligned with the disc, and then slightly rotated in the circumferential direction, so that the connecting piece on the protrusion is clamped with the locking piece on the ring pressing plate, and the temporary fixing of the ring pressing plate can be quickly realized. The temporary fixing structure can keep the ring pressing plate in a stable posture, and during the subsequent screwing process, the staff does not need to hold the ring pressing plate with hands to maintain positioning, the displacement or deflection of the ring pressing plate is effectively avoided, and the screw installation operation is more convenient and efficient.

[0017] Optionally, recesses matched with the connecting rods are formed in the protrusion and the ring pressing plate.

[0018] By adopting the technical scheme, the mounting height of the connecting rod is designed to be lower than the outer circular arc surface of the Nd-Fe-B workpiece, and the connecting rod is stably connected with the limiting ring through the ring frame, which not only ensures the support and limiting reliability of the limiting ring on the workpiece, but also enables the connecting rod to completely avoid the polishing area of the outer circular arc surface of the workpiece, avoids interference with the grinding head when polishing the outer circular arc, and thus does not affect the polishing precision and operation fluency of the outer circular arc surface, and both the connection stability and the processing adaptability are considered.

[0019] Optionally, the X-axis displacement assembly comprises a first lead screw, two first sliding rails, and a first motor. The two first sliding rails are symmetrically arranged on the two sides of the first lead screw. The bottom of the support frame is threadedly connected with the first lead screw and slidably connected with the two first sliding rails. The first motor is fixedly installed on one side of the mounting seat and used to drive the first lead screw to rotate.

[0020] Optionally, the Y-axis displacement assembly comprises a second lead screw, two vertical rods, and a second motor. The two vertical rods are symmetrically arranged on the two sides of the second lead screw. The connecting seat is threadedly connected with the second lead screw and slidably connected with the two vertical rods. The second motor is fixedly installed on the top of the support frame and used to drive the second lead screw to rotate.

[0021] Optionally, the Z-axis displacement assembly comprises a support seat, a strip-shaped hole, a second sliding rail, a third lead screw, and a third motor. The support seat is horizontally fixed on one side of the connecting seat. The strip-shaped hole is formed in the middle of the support seat along the length direction of the support seat. The bottom of the first spindle box is fixedly connected with a fixed block matched with the strip-shaped hole. The fixed block is threadedly connected with the third lead screw. The first spindle box is slidably connected with the second sliding rail. The third motor is fixedly installed on one side of the support seat and used to drive the third lead screw to rotate.

[0022] Optionally, a manual speed controller is connected in series between the second spindle box and the fifth motor. The manual speed controller is fixedly installed on the housing of the second spindle box and used to manually adjust the output rotating speed of the second spindle box.

[0023] By adopting the above technical scheme, the rotating speed can be fine-tuned during the polishing operation, which is convenient and efficient. At the same time, the cutting demand under different working conditions can be accurately matched, which not only ensures the polishing surface processing quality of the Nd-Fe-B workpiece, but also further widens the processing adaptation range of the equipment and improves the overall processing flexibility.

[0024] In summary, compared with the prior art, the present application has at least one of the following beneficial technical effects:

[0025] 1、Through the cooperation between the disc, the placing groove, the ring pressure plate and the screw, multiple Nd-Fe-B workpieces can be clamped at one time, reducing repeated clamping operations. Then, relying on the three-axis displacement assembly to drive the grinding head to flexibly switch the machining station, the synchronous grinding operation of all workpiece inner and outer arc surfaces can be continuously completed without disassembling the workpiece. This design eliminates the cumbersome steps of workpiece overturning, re-clamping and secondary positioning in traditional processes, greatly shortens the single batch processing cycle, effectively improves the batch production efficiency of arc-shaped Nd-Fe-B workpieces, and adapts to the demand of large-scale processing.

[0026] 2、Through the cooperation between the limiting ring, the positioning piece, the disc and the ring frame, two-way collaborative support can be formed, effectively inhibiting the displacement or shaking of the workpiece due to cutting force, and ensuring the machining precision and surface quality of the inner and outer arc surfaces; When the workpiece is installed, the limiting ring can pre-support and laterally position the workpiece placed in the placing groove one by one, without the need for manual continuous support and alignment. Subsequently, the ring pressure plate is uniformly pressed and fixed. The entire clamping process is simple and efficient, significantly reducing the labor intensity of the operator. BRIEF DESCRIPTION OF DRAWINGS

[0027] Figure 1 It is a whole structure schematic diagram of a special-shaped Nd-Fe-B grinding device of the present application;

[0028] Figure 2 It is a left view structure schematic diagram of a special-shaped Nd-Fe-B grinding device of the present application;

[0029] Figure 3 It is a whole structure schematic diagram of a clamping mechanism in the present application;

[0030] Figure 4 It is a front view structure schematic diagram of a clamping mechanism in the present application;

[0031] Figure 5 It is a rear view structure schematic diagram of a clamping mechanism in the present application;

[0032] Figure 6 It is an assembly structure schematic diagram of a connecting piece and a locking piece in the present application;

[0033] Figure 7 It is a cross-sectional structure schematic diagram of a positioning insert plate and a limiting assembly in the present application;

[0034] Figure 8 It is a top view structure schematic diagram of a clamping driving assembly and a clamping mechanism in the present application;

[0035] Figure 9 It is a cross-sectional structure schematic diagram of a supporting seat in the present application;

[0036] Figure 10 It is a structure schematic diagram of a ring frame, a positioning piece and a limiting ring in the present application;

[0037] Figure 11 Figure 8 is a schematic view of the movement state of the clamping mechanism when polishing the outer arc surface of the workpiece in the embodiment of the present application.

[0038] The reference signs are explained as follows: 1, workbench; 11, mounting seat; 111, first lead screw; 112, first sliding rail; 113, first motor; 12, support frame; 121, second lead screw; 122, vertical rod; 123, second motor; 13, connecting seat; 131, support seat; 132, strip-shaped hole; 133, second sliding rail; 134, third lead screw; 135, third motor; 2, first spindle box; 21, polishing head; 22, fourth motor; 23, fixed block; 3, second spindle box; 31, disc; 311, placing groove; 312, protruding block; 313, connecting piece; 314, through hole; 32, ring frame; 321, connecting rod; 322, limiting ring; 323, fixed insertion plate; 324, positioning insertion plate; 325, first insertion hole; 326, second insertion hole; 33, ring pressing plate; 331, groove; 332, locking piece; 34, screw; 35, manual speed controller; 36, fifth motor; 4, mounting block; 41, insertion rod; 42, spring; 43, end block; 431, T-shaped slot; 432, clamping block; 44, insertion groove; 5, Nd-Fe-B workpiece. DETAILED DESCRIPTION

[0039] To make the objectives, technical solutions, and advantages of the embodiments of the present application clearer, the following will combine the Figures 1-11 technical solutions of the embodiments of the present application are clearly and completely described. Based on the described embodiments of the present application, all other embodiments obtained by a person of ordinary skill in the art belong to the scope of protection of the present application.

[0040] With reference to Figure 1 , Figure 2 and Figure 3 , the embodiment provides a special-shaped Nd-Fe-B polishing device, which comprises a workbench 1, a polishing mechanism, a clamping mechanism, and a displacement mechanism. The workbench 1 is a basic bearing component of the overall device, adopts an L-shaped integrated structure design, provides an installation reference and stable support for each mechanism; the polishing mechanism comprises a polishing execution assembly and a clamping driving assembly, the polishing execution assembly integrates a grinding tool and a matching driving unit, can drive the grinding tool to rotate at a high speed, and realizes cutting and polishing on the surface of the Nd-Fe-B workpiece 5; the clamping driving assembly is an installation carrier of the clamping mechanism, is equipped with a power output module, can drive the clamping mechanism and the clamped Nd-Fe-B workpiece 5 to rotate synchronously and stably, and provides adaptive motion cooperation for polishing operation. The clamping mechanism adopts a multi-station synchronous clamping structure, is used for stably fixing the Nd-Fe-B workpiece 5 to be polished, and makes the Nd-Fe-B workpiece 5 stable during rotation and polishing; the displacement mechanism is fixedly installed on the workbench 1, can accurately control the spatial position and operation posture of the polishing execution assembly, makes the grinding tool be able to flexibly switch to a corresponding machining station of the inner arc surface or the outer arc surface of the Nd-Fe-B workpiece 5, and realizes integrated continuous polishing operation.

[0041] wherein, with reference to Figure 1 , Figure 2 and Figure 8 , the polishing mechanism comprises a polishing execution assembly and a clamping driving assembly, both of which cooperate to complete the polishing work of the Nd-Fe-B workpiece 5. Specifically, the polishing execution assembly comprises a first spindle box 2, a grinding head 21 and a fourth motor 22, the grinding head 21 is rigidly fixed to the output end of the first spindle box 2, and the fourth motor 22 is fixedly assembled at the power input end of the first spindle box 2. The transmission structure inside the first spindle box 2 realizes efficient transmission of power, drives the grinding head 21 to rotate at a high speed with a preset speed, and provides cutting power for the polishing work; the clamping driving assembly comprises a second spindle box 3 and a fifth motor 36, the second spindle box 3 is stably installed on the preset mounting surface of the workbench 1, and the fifth motor 36 is fixedly installed at the power input end of the second spindle box 3. The clamping mechanism is rigidly connected with the output end of the second spindle box 3, and the power of the fifth motor 36 is transmitted to the clamping mechanism through the second spindle box 3 to drive the clamping mechanism and the clamped Nd-Fe-B workpiece 5 to rotate stably, and the polishing action of the grinding head 21 forms a dynamic adaptation.

[0042] When working, the fourth motor 22 starts to drive the grinding head 21 to rotate at a high speed through the first spindle box 2 to form a polishing cutting power; at the same time, the fifth motor 36 drives the clamping mechanism and the Nd-Fe-B workpiece 5 to rotate synchronously and stably through the second spindle box 3, so that the inner arc surface or the outer arc surface of the workpiece to be polished continuously contacts the grinding head 21 rotating at a high speed; cooperating with the position control of the displacement mechanism on the polishing execution assembly, the continuous and uniform polishing of the workpiece surface is realized.

[0043] wherein, with reference to Figure 3 , Figure 4 , Figure 8 and Figure 11 , the clamping mechanism comprises a disc 31, a placing groove 311, a protrusion 312, a ring pressing plate 33 and a screw 34. The disc 31 is coaxially fixed to the output end of the second spindle box 3, and a plurality of placing grooves 311 are uniformly and spaced apart on the side close to the grinding head 21 for positioning and placing the Nd-Fe-B workpiece 5. One protrusion 312 is arranged between two adjacent placing grooves 311, and the protrusion 312 and the disc 31 are designed as an integrated structure. The ring pressing plate 33 is assembled on the side of the disc 31 close to the protrusion 312, a plurality of connecting holes are formed on the plate body for the screws 34 to pass through, and a plurality of threaded holes matched with the screws 34 are formed on the protrusion 312. There are five screws 34, which are uniformly distributed in a circumferential array, the number of connecting holes corresponds to the number of screws 34, and the number of screws 34 can be flexibly adjusted according to the clamping requirements in actual application, for example, four or six.

[0044] In actual clamping operation, the Nd-Fe-B workpieces 5 are placed in the corresponding placing grooves 311 one by one, then the ring pressing plate 33 is assembled by being attached to the end face of the convex block 312, the connecting holes on the ring pressing plate 33 are accurately aligned with the threaded holes of the convex block 312, and then the screws 34 are tightened one by one to complete the locking of the ring pressing plate 33. This structure does not need to fix each Nd-Fe-B workpiece 5 individually, but realizes the synchronous clamping of multiple workpieces through the overall pressing of the ring pressing plate 33, significantly simplifies the clamping process, and improves the convenience and operation efficiency of workpiece installation.

[0045] Wherein, with reference to Figure 1 、 Figure 2 and Figure 9 , the displacement mechanism comprises a mounting seat 11, an X-axis displacement assembly, a support frame 12, a Y-axis displacement assembly, a connecting seat 13 and a Z-axis displacement assembly. The mounting seat 11 is fixedly installed on a predetermined mounting surface of the workbench 1, the X-axis displacement assembly is assembled on the top of the mounting seat 11, and the support frame 12 is fixedly connected with the execution end of the X-axis displacement assembly; the Y-axis displacement assembly is vertically assembled on the side end face of the support frame 12 close to the first spindle box 2, and the connecting seat 13 is fixedly connected with the execution end of the Y-axis displacement assembly; the Z-axis displacement assembly is horizontally assembled on one side of the connecting seat 13, and the first spindle box 2 is rigidly fixed with the execution end of the Z-axis displacement assembly.

[0046] Specifically, the X-axis displacement assembly comprises a first lead screw 111, a first sliding rail 112 and a first motor 113, the first sliding rail 112 has two, the two first sliding rails 112 are symmetrically arranged on the two sides of the first lead screw 111, the bottom of the support frame 12 is threadedly connected with the first lead screw 111 and is in sliding fit with the two first sliding rails 112; the first motor 113 is fixedly installed on one side of the mounting seat 11, and its output end is in transmission connection with the first lead screw 111 through a shaft coupling. The Y-axis displacement assembly comprises a second lead screw 121, a vertical rod 122 and a second motor 123, the vertical rod 122 has two, the two vertical rods 122 are symmetrically arranged on the two sides of the second lead screw 121, the connecting seat 13 is threadedly connected with the second lead screw 121 and is in sliding fit with the two vertical rods 122; the second motor 123 is fixedly installed on the top of the support frame 12, and its output end is in transmission connection with the second lead screw 121 through a shaft coupling. The Z-axis displacement assembly comprises a support seat 131, a strip-shaped hole 132, a second sliding rail 133, a third lead screw 134 and a third motor 135, the support seat 131 is horizontally fixed on one side of the connecting seat 13, the strip-shaped hole 132 is formed in the middle of the support seat 131 along the length direction of the support seat 131, the bottom of the first spindle box 2 is fixedly connected with a fixing block 23 matched with the strip-shaped hole 132, the fixing block 23 is threadedly connected with the third lead screw 134, the first spindle box 2 is in sliding fit with the second sliding rail 133, and the third motor 135 is fixedly installed on one side of the support seat 131, and its output end is in transmission connection with the third lead screw 134 through a shaft coupling.

[0047] In operation, the first motor 113 drives the first screw rod 111 to rotate, driving the support frame 12, the connecting seat 13 and the polishing execution assembly to translate along the X-axis direction; the second motor 123 drives the second screw rod 121 to rotate, driving the connecting seat 13 and the polishing execution assembly to ascend and descend along the Y-axis direction; the third motor 135 drives the third screw rod 134 to rotate, directly driving the polishing execution assembly to translate along the Z-axis direction. Through independent driving and collaborative linkage of the first motor 113, the second motor 123 and the third motor 135, the polishing execution assembly can realize accurate positioning of different stations in a three-dimensional space and flexibly switch to corresponding machining positions of the inner arc surface or the outer arc surface of the Nd-Fe-B workpiece 5.

[0048] In addition, with reference to Figure 3 、 Figure 4 、 Figure 5 、 Figure 7 、 Figure 10 and Figure 11 , the side of the disc 31 away from the grinding head 21 is axially slidably provided with a ring frame 32, which is a ring-shaped frame structure and is fixedly connected with a plurality of connecting rods 321 at intervals in the circumferential direction. One end of the connecting rod 321 axially penetrates the disc 31 and is fixedly connected with a limiting ring 322. After the limiting ring 322 is positioned corresponding to the placement groove 311, it can form lateral support for the Nd-Fe-B workpiece 5 in the placement groove 311. The ring frame 32 is fixedly provided with a positioning member corresponding to the placement groove 311, and the disc 31 is correspondingly provided with a through hole 314 for the positioning member to movably pass through. One end of the positioning member away from the ring frame 32 can extend into the placement groove 311 through the through hole 314 to form rigid support for the inner side of the workpiece. The disc 31 is provided with two groups of limiting assemblies symmetrically distributed for limiting the ring frame 32, adjusting the distance between the ring frame 32 and the disc 31, and further switching the working state of the limiting ring 322 and the positioning member. The convex block 312 and the ring pressing plate 33 are both provided with grooves 331 adapted to the connecting rods 321. The installation height of the connecting rod 321 is lower than the outer arc surface of the Nd-Fe-B workpiece 5, which not only ensures the support reliability of the limiting ring 322 for the Nd-Fe-B workpiece 5, but also allows the connecting rod 321 to avoid the polishing area of the outer arc surface of the workpiece, taking into account the connection stability and processing adaptability.

[0049] Specifically, the positioning member includes fixed insertion plates 323 and positioning insertion plates 324, and the total number of the fixed insertion plates 323 and the positioning insertion plates 324 is consistent with the number of the placement grooves 311, so that each neodymium iron boron workpiece 5 can be subjected to an auxiliary force; the positioning insertion plates 324 are provided in two sets, and the two sets of positioning insertion plates 324 are provided in one-to-one correspondence with the two sets of limiting assemblies. The limiting assembly includes a mounting block 4, an insertion rod 41, a spring 42, and an end block 43, the insertion rod 41 is movably inserted into the inside of the mounting block 4, the end block 43 is fixedly connected to the end of the insertion rod 41, the spring 42 is sleeved on the outside of the insertion rod 41, one end of the spring 42 is fixedly connected to the mounting block 4, and the other end of the spring 42 is fixedly connected to the end block 43; the positioning insertion plate 324 is provided with a first insertion hole 325 and a second insertion hole 326 which are adapted to the insertion rod 41.

[0050] When the inner arc surface of the neodymium iron boron workpiece 5 needs to be polished, the insertion rod 41 is inserted into the second insertion hole 326, at this time the limiting ring 322 abuts against the outer side surface of the neodymium iron boron workpiece 5, a lateral auxiliary limiting action is formed, and the displacement or shaking of the workpiece caused by the cutting force in the polishing process is effectively blocked; when the outer arc surface of the neodymium iron boron workpiece 5 needs to be polished, the insertion rod 41 is switched to the first insertion hole 325, the fixed insertion plate 323 and the positioning insertion plate 324 provide rigid support for the inner side surface of the neodymium iron boron workpiece 5 through the through hole 314 on the disc 31, the stable posture of the workpiece in the polishing process is ensured, and then the polishing precision and the surface quality of the inner and outer arc surfaces are ensured. In addition, during the workpiece installation stage, after the operator places the neodymium iron boron workpieces 5 into the corresponding placement grooves 311 one by one, the limiting ring 322 will immediately form a pre-support and lateral positioning for the outer arc surface of each workpiece, and the workers do not need to hold the workpieces by hand throughout the process; after all the workpieces are placed in position, the ring pressing plate 33 is driven by tightening the screw 34 to uniformly press and fix all the workpieces, and the entire clamping process does not need to be positioned and fixed individually, which is simple, efficient, time-saving and labor-saving.

[0051] With reference to Figure 5 and Figure 7 , the end block 43 is provided with a T-shaped groove 431, a clamping block 432 is movably inserted into the inside of the T-shaped groove 431, and the disc 31 is provided with an insertion slot 44 which is adapted to the clamping block 432, and the position of the end block 43 can be locked through the clamping cooperation of the clamping block 432 and the insertion slot 44.

[0052] When the axial position of the ring frame 32 is adjusted, after the limiting constraint of one set of limiting assemblies is released, the clamping block 432 on the end block 43 only needs to be pushed along the T-shaped groove 431 to the disc 31, so that it is accurately clamped into the corresponding insertion slot 44 of the disc 31, and the reliable locking of the end block 43 can be realized. After locking, the workers do not need to manually hold the end block 43 or apply external force to maintain the unlocked posture, which effectively avoids the operation fatigue caused by continuous force application, provides convenience for releasing the constraint of the other set of limiting assemblies, and the entire operation step is simple, convenient, labor-saving and efficient.

[0053] With reference to Figure 6 , the protruding block 312 is fixedly connected with a connecting piece 313 on the side close to the ring pressing plate 33, the ring pressing plate 33 is fixedly connected with a locking piece 332 corresponding to the connecting piece 313 and matching on the side close to the protruding block 312, and the connecting piece 313 cooperates with the locking piece 332 to realize the pre-positioning of the ring pressing plate 33.

[0054] When installing the ring pressing plate 33, first align it coaxially with the disc 31, then slightly rotate the ring pressing plate 33 in the circumferential direction, so that the connecting piece 313 on the protruding block 312 is clamped with the locking piece 332 on the ring pressing plate 33, and the temporary positioning of the ring pressing plate 33 can be quickly completed. This temporary positioning structure can keep the ring pressing plate 33 in a stable state at all times, and the staff does not need to manually support or fix the ring pressing plate 33 during the subsequent tightening of the screw 34, which not only avoids the displacement of the ring pressing plate 33, but also makes the installation operation of the screw 34 more efficient.

[0055] With reference to Figure 1 , Figure 2 and Figure 8 , the second spindle box 3 and the fifth motor 36 are connected in series with the manual speed controller 35, which is fixedly installed on the shell of the second spindle box 3, and is used for manually adjusting the output speed of the second spindle box 3.

[0056] By setting the manual speed controller 35, the speed can be adjusted immediately during the polishing operation, which is convenient and efficient; at the same time, this structure can adapt to the polishing needs of different working conditions, ensure the polishing surface quality of the neodymium iron boron workpiece 5, and further improve the overall processing flexibility.

[0057] The implementation principle of the embodiment of the application is as follows:

[0058] When clamping the workpiece, the neodymium iron boron workpiece 5 to be polished is placed one by one into the corresponding placing groove 311 on the disc 31, at this time the inserting rod 41 is inserted into the second insertion hole 326, and the limiting ring 322 on the ring frame 32 pre-supports the outer arc surface of each workpiece to keep it in a stable posture. Then, the ring pressing plate 33 is coaxially aligned with the disc 31, and the connecting piece 313 on the protruding block 312 is clamped with the locking piece 332 of the ring pressing plate 33 by slightly rotating in the circumferential direction, to complete the pre-positioning of the ring pressing plate 33; then the screw 34 is aligned with the threaded hole of the protruding block 312 through the connecting hole of the ring pressing plate 33 and is tightened one by one, and the synchronous clamping of multiple workpieces is realized by the overall compression of the ring pressing plate 33.

[0059] The first motor 113, the second motor 123 and the third motor 135 of the displacement mechanism are started, and three-dimensional positioning of the grinding head 21 is realized through independent driving and collaborative linkage: the first motor 113 drives the first lead screw 111 to rotate, driving the support frame 12 to translate along the X-axis direction; the second motor 123 drives the second lead screw 121 to rotate, driving the connecting seat 13 to ascend and descend along the vertical rod 122; the third motor 135 drives the third lead screw 134 to rotate, driving the first spindle box 2 to translate along the strip-shaped hole 132 through the fixed block 23. Finally, the grinding head 21 is adjusted to the corresponding machining position of the inner arc surface of the Nd-Fe-B workpiece 5.

[0060] When polishing the inner side surface of the Nd-Fe-B workpiece 5, the fourth motor 22 is started, and its output shaft drives the grinding head 21 to rotate at a preset speed through the transmission structure inside the first spindle box 2, forming a cutting power; at the same time, the fifth motor 36 is started, and the disc 31 and the clamped Nd-Fe-B workpiece 5 are driven to rotate stably through the second spindle box 3, and the workpiece rotation speed can be adjusted in real time through the manual speed controller 35, so that the inner side surface of the Nd-Fe-B workpiece 5 can be polished.

[0061] After polishing the inner arc surface, the equipment is temporarily stopped. Then the end block 43 of one set of limiting components is pulled, and the insertion rod 41 is pulled out of the second insertion hole 326 of the positioning insertion plate 324, at this time the spring 42 of the set of limiting components is in a stretched state; then the corresponding clamping block 432 on the end block 43 is pushed, so that it is clamped into the insertion slot 44 of the disc 31, and the limiting constraint of the set of limiting components on the ring frame 32 is released. Another set of limiting components is operated according to the same steps, and the ring frame 32 is completely unlocked. Then the ring frame 32 is pushed to move axially, so that the first insertion hole 325 on the positioning insertion plate 324 is accurately aligned with the position of the insertion rod 41; then the clamping block 432 is pulled out of the insertion slot 44, and the insertion rod 41 is automatically inserted into the first insertion hole 325 under the elastic restoring force of the spring 42, completing the position locking of the ring frame 32. At this time, the limiting ring 322 moves away from the disc 31 with the ring frame 32, avoiding the workpiece polishing area to avoid interference; at the same time, the fixed insertion plate 323 and the positioning insertion plate 324 extend through the through hole 314 on the disc 31 and are in close contact with the inner side surface of the corresponding Nd-Fe-B workpiece 5, providing rigid auxiliary support for the workpiece, and ensuring that it always maintains a stable posture in the subsequent polishing process.

[0062] The first motor 113, the second motor 123 and the third motor 135 of the displacement mechanism are started again, and the spatial position and working posture of the first spindle box 2 and the grinding head 21 are adjusted through the collaborative driving of the X-axis, Y-axis and Z-axis displacement components, so that the grinding head 21 is switched to the corresponding machining position of the outer arc surface of the Nd-Fe-B workpiece 5. Restarting the fourth motor 22 and the fifth motor 36 can polish the outer arc surface of the workpiece.

[0063] The above are preferred embodiments of the present application, it should be pointed out that, for those skilled in the art, without departing from the principles described in the present application, can make a number of improvements and refinements, these improvements and refinements should also be considered as the scope of protection of the present application.

Claims

1. A special-shaped NdFeB grinding device, comprising a worktable, characterized in that: A mounting base is fixedly installed on the worktable. An X-axis displacement component is mounted on the mounting base. The execution end of the X-axis displacement component is connected to a support frame. A Y-axis displacement component is mounted on one side of the support frame. The execution end of the Y-axis displacement component is connected to a connecting seat. A Z-axis displacement component is mounted on the connecting seat. The execution end of the Z-axis displacement component is fixedly connected to a first spindle box. The output end of the first spindle box is connected to a grinding head, and its power input end is connected to a fourth motor. A second spindle box corresponding to the position of the first spindle box is fixedly installed on the worktable. A disc is coaxially fixedly connected to the output end of the second spindle box, and a fifth motor is driven to its power input end. The disc has multiple placement slots spaced apart along the circumference on the side near the grinding head, and a protrusion is provided between two adjacent placement slots; a ring pressure plate is provided on the side of the disc near the protrusion, and multiple screws are provided on the ring pressure plate in a circumferential distribution. The threaded end of the screw is threadedly connected to the corresponding protrusion to lock the ring pressure plate onto the protrusion. A ring frame is movably mounted on the side of the disc away from the grinding head. Multiple connecting rods are fixedly connected at intervals along the circumference of the ring frame. One end of each connecting rod passes through the disc along the axial direction and is fixedly connected to a limit ring. A positioning component corresponding to the placement slot is fixedly mounted on the ring frame. The disc has through holes that correspond one-to-one with the placement slots. One end of the positioning component is movably inserted into the corresponding through hole. A limit component is provided on the disc to limit the ring frame and maintain different distances between the ring frame and the disc. There are two sets of limiting components, which are symmetrically arranged on the disc. The positioning components include a fixed insert plate and a positioning insert plate. The total number of fixed insert plates and positioning insert plates is the same as the number of placement slots. There are two positioning insert plates, and the two positioning insert plates are set one-to-one with the two sets of limiting components. The limiting components include a mounting block, a rod, a spring, and an end block. The rod is movably inserted into the interior of the mounting block, and the end block is fixedly set at the end of the rod. The spring is sleeved on the outside of the rod, with one end fixedly connected to the mounting block and the other end fixedly connected to the end block. The positioning insert plate has a first insertion hole and a second insertion hole that are adapted to the rod.

2. The non-circular NdFeB grinding device according to claim 1, characterized in that: The end block has a T-shaped groove, and a locking block is movably inserted inside the T-shaped groove. The disc has a slot that matches the locking block, and the locking block and the slot cooperate to lock the position of the end block.

3. The non-circular NdFeB grinding device according to claim 1, characterized in that: A connector is fixedly connected to the side of the protrusion near the ring pressure plate, and a locking member is fixedly connected to the side of the ring pressure plate near the protrusion, which corresponds to and is adapted to the connector. The connector and the locking member cooperate to achieve the pre-positioning of the ring pressure plate.

4. The non-circular NdFeB grinding device according to claim 1, characterized in that: Both the protrusion and the ring pressure plate are provided with grooves that are adapted to the connecting rod.

5. The non-circular NdFeB grinding device according to claim 1, characterized in that: The X-axis displacement assembly includes a first lead screw, a first slide rail, and a first motor. There are two first slide rails, which are symmetrically arranged on both sides of the first lead screw. The bottom of the support frame is threadedly connected to the first lead screw and slides in cooperation with the two first slide rails. The first motor is fixedly installed on one side of the mounting base and is used to drive the first lead screw to rotate.

6. The non-circular NdFeB grinding device according to claim 1, characterized in that: The Y-axis displacement assembly includes a second lead screw, two vertical rods, and a second motor. There are two vertical rods, which are symmetrically arranged on both sides of the second lead screw. The connecting seat is threadedly connected to the second lead screw and slides with the two vertical rods. The second motor is fixedly installed on the top of the support frame and is used to drive the second lead screw to rotate.

7. The non-circular NdFeB grinding device according to claim 1, characterized in that: The Z-axis displacement assembly includes a support base, a strip hole, a second slide rail, a third lead screw, and a third motor. The support base is horizontally fixed on one side of the connecting seat. The strip hole is opened in the middle of the support base along its length. A fixing block adapted to the strip hole is fixedly connected to the bottom of the first spindle box. The fixing block is threadedly connected to the third lead screw. The first spindle box is slidably fitted with the second slide rail. The third motor is fixedly installed on one side of the support base and is used to drive the third lead screw to rotate.

8. The non-circular NdFeB grinding device according to claim 1, characterized in that: A manual speed controller is connected in series between the second spindle box and the fifth motor. The manual speed controller is fixedly installed on the housing of the second spindle box and is used to manually adjust the output speed of the second spindle box.

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