A device for automatically treating the surface of NdFeB magnets

Abstract

The present invention relates to the field of surface treatment technology, and in particular to an automatic surface treatment device for NdFeB magnets; comprising a fixed plate and an inverted concave frame installed at its front end, the frame is provided with a grinding mechanism and a fixing mechanism; the grinding mechanism comprises four rectangularly distributed grinding rollers and a pushing portion for limiting the magnet so that it remains stable during grinding. The present invention coordinates the position of the magnet by means of a guide portion and a drive portion, so that the outer arc edge and the inner arc edge of the magnet always maintain normal vertical contact with the grinding roller, thereby avoiding the mismatch problem of curvature change caused by the vertical feed method. The present invention adopts a mechanism that coordinates magnet position control with the real-time, continuous and stable position of the magnet, and solves the problems of overcutting and undergrinding from multiple angles from the two aspects of position control and position restriction, thereby improving the quality and uniformity of magnet grinding.

Description

Technical Field

[0001] The present invention relates to the technical field of surface treatment, in particular to an automatic surface treatment device for a neodymium iron boron magnet. Background Art

[0002] Neodymium iron boron (NdFeB) materials are widely used in new energy vehicles, wind power generation, consumer electronics, and other fields due to their excellent magnetic properties. During the magnet preparation process, multiple surface treatments are required, including chamfering, electroplating, and phosphating. Chamfering is achieved by grinding away sharp angles, burrs, and microcracks on the magnet's edges to prevent them from interfering with the subsequent phosphating process. This process is primarily performed by a square chamfering machine, which secures the magnet in place before moving it vertically to contact a grinding wheel for edge chamfering.

[0003] Currently, the following problems exist in the magnet processing process: First, the vertical feed method cannot adapt to the change of arc surface curvature, resulting in overcutting of the arc top area and under-grinding of the transition areas at both ends, causing uneven chamfer width, thereby affecting the uniformity of subsequent phosphating treatment. The phosphate film layer in the overcut area is easy to peel off, and the sharp edges of the under-grinded area become the starting point of corrosion due to plating leakage, which greatly reduces the protective life of the magnet. At the same time, the position stability of the magnet during grinding needs to be improved, and the stability of the magnet will directly affect the grinding quality and consistency, causing under-grinding or overcutting.

[0004] Therefore, the vertical feeding method cannot adapt to the change of the curvature of the arc surface and the insufficient position stability of the magnet during grinding, which easily leads to the problem of under-grinding or over-cutting, which is a technical problem that technical personnel in this field need to solve. Summary of the Invention

[0005] In view of the above problems, an embodiment of the present invention provides an automatic surface treatment device for NdFeB magnets to solve the above-mentioned technical problems.

[0006] In order to achieve the above-mentioned purpose, the embodiment of the present invention provides the following technical solutions: an automatic surface treatment device for NdFeB magnets, comprising a fixing plate and an inverted concave frame installed at its front end, the frame being provided with a grinding mechanism and a fixing mechanism; the grinding mechanism comprising four rectangularly distributed grinding rollers and a pushing portion for limiting the magnet so that it remains stable during grinding, the axes of the upper and lower grinding rollers being perpendicular to each other, and the grinding rollers being slid left and right on the frame; the fixing mechanism comprising a supporting plate slidably installed in the frame forward and backward, a lifting plate being slidably installed in the supporting plate upward and downward, a turntable with a vertical axis being rotatably installed at the upper end of the lifting plate, and two fixedly installed at the upper end of the turntable There are two symmetrical limit plates, and suction cups with a horizontal rotation reference line are installed on the two limit plates for joint rotation. A module is set on the upper end of the suction cup, and a guide part and a driving part for driving the guide part to drive the suction cup to rotate at a fixed angle are provided on the turntable; when the arc edge of the magnet is ground, the driving part drives the suction cup to rotate through the guide part. During the rotation process, the arc edge of the magnet is always in perpendicular contact with the normal of the corresponding grinding roller, and the cutting depth of the grinding roller on the arc edge of the magnet is constant; when the horizontal edge of the magnet is ground, the turntable rotates ninety degrees so that the horizontal edge of the magnet corresponds to the grinding roller; during the grinding period, the magnet is always under force balance under the action of the pushing part and maintains a stable position with the suction cup.

[0007] As a preferred solution, the grinding mechanism also includes two slide grooves respectively opened on the left and right sides of the frame, and the slide grooves are located on the rear side of the through hole. An H-shaped frame is slidably installed in the slide grooves, and the two horizontal sections of the H-shaped frame are fixedly installed with shaft seats at one end close to the support plate, and the grinding roller is rotatably installed on the corresponding shaft seat.

[0008] As a preferred solution, the H-shaped frame is provided with an actuator for driving the grinding roller to rotate, and the actuator includes a rotating shaft rotatably mounted on the shaft seat, the rotating shaft rotates through the vertical section of the H-shaped frame, and the two upper and lower opposite rotating shafts are connected by a bevel gear set. A transmission shaft is rotatably mounted on the connecting plate, and the transmission shaft and the corresponding rotating shaft, as well as the grinding roller and the corresponding rotating shaft are connected by belt transmission.

[0009] As a preferred solution, the frame is equipped with a push-pull member for pushing and pulling the H-shaped frame, and the push-pull member includes a connecting plate. The two horizontal sections of the H-shaped frame are fixedly installed with a connecting plate at one end away from the lifting plate. The opposite surfaces of the two vertical sections of the frame are fixedly installed with a No. 1 cylinder. The telescopic section of the No. 1 cylinder slides through the frame and is fixedly connected to the corresponding connecting plate.

[0010] As a preferred solution, an axis plate is fixedly installed at the front end of the frame, and two sliding rods that are symmetrical on the left and right and located below the horizontal section of the frame are fixedly installed between the axis plate and the fixed plate. Two sliding sleeves are slidably installed on the two sliding rods, and the lower end of the sliding sleeve is fixedly connected to the upper end of the support plate. A No. 4 cylinder is fixedly installed at the lower end of the horizontal section of the frame, and the telescopic section of the No. 4 cylinder is fixedly connected to the sliding sleeve on the front side.

[0011] As a preferred solution, the guide portion includes an arc-shaped guide groove opened on the limit plate, and the lower end of the suction cup is hingedly installed with two pairs of front-to-back symmetrical push-pull rods located between the two limit plates. The push-pull rods in each pair are symmetrical left and right, and the opposite sections are hingedly installed with guide columns that cooperate with the guide groove. The opposite ends of the two limit plates are rotatably installed with support plates, and the two support plates are fixedly installed at the lower end of the suction cup.

[0012] As a preferred solution, the driving part includes a No. 2 cylinder fixedly installed on the upper end of the turntable, and the telescopic section of the No. 2 cylinder is fixedly installed with a slide that is slidably connected to the turntable, and a rack is installed on the upper end of the slide, and a gear meshing with the rack is coaxially installed at the rotation point of one of the support plates.

[0013] As a preferred solution, a No. 3 cylinder whose telescopic section is fixedly connected to the lifting plate is fixedly installed at the front end of the rear vertical section of the support plate, and a servo motor whose output shaft is fixedly connected to the turntable is fixedly installed at the lower end of the lifting plate.

[0014] As a preferred solution, the pushing part includes pressure rods symmetrically arranged on the front and rear sides of the grinding roller, the pressure rods are fixedly mounted on the corresponding shaft seats, an inverted L-shaped mounting plate is arranged between the grinding roller located on the lower side and the corresponding pressure rods, the mounting plate is fixedly mounted on the corresponding shaft seat, and a pressure roller located above the grinding roller is rotatably mounted on the end of the mounting plate away from the shaft seat.

[0015] As a preferred solution, a connecting rod is fixedly installed between the two push-pull rods in the same pair; and a ball bearing is provided at the end of the pressure rod.

[0016] The above-mentioned one or more technical solutions in the embodiments of the present invention have at least one of the following technical effects: 1. The present invention adjusts the position of the magnet by cooperating the guide part and the drive part, so that the outer arc edge and the inner arc edge of the magnet always maintain vertical contact with the normal of the grinding roller, thereby avoiding the mismatch problem of the vertical feed method to the curvature change, ensuring that the chamfer width of the transition zone from the arc top to the end is consistent, eliminating the risk of stress peeling of the film layer in the over-cut area and the risk of sharp edge plating leakage in the under-ground area, and ensuring uniform coverage of the subsequent phosphating film.

[0017] 2. The present invention is based on the realization that the outer arc edge and the inner arc edge of the magnet always maintain vertical contact with the normal of the grinding roller. During the period when the magnet is being polished by the grinding roller, the pushing part gives the magnet a force in the opposite direction to the force applied by the grinding roller, thereby balancing the force on the magnet and ensuring that the magnet, the grinding roller and the suction cup always maintain a stable relative position, avoiding under-grinding or over-cutting due to the deviation of the magnet, resulting in reduced grinding quality, consistency and uniformity of the arc edge and horizontal edge of the magnet.

[0018] 3. The present invention adopts a mechanism that combines magnet position control with real-time, continuous and stable magnet position. Starting from the two aspects of position control and position limitation, it solves the problems of overcutting and under-grinding from multiple angles, thereby improving the quality and uniformity of magnet grinding.

[0019] Additional aspects and advantages of the present invention will be set forth in part in the description which follows and, in part, will be obvious from the description which follows, or may be learned by practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are merely embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying any creative work.

[0021] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention.

[0022] Figure 2 It is a three-dimensional structural schematic diagram of the local structure of the present invention.

[0023] Figure 3 This is a schematic diagram of the process of the suction cup driving the magnet to rotate according to the present invention.

[0024] Figure 4 It is a schematic diagram of the three-dimensional structure of the grinding roller and the pushing part of the present invention.

[0025] Figure 5 It is a schematic diagram of the state when the upper and lower grinding rollers of the present invention are in contact with the arc edge of the magnet respectively.

[0026] Figure 6 This is a schematic diagram of the state when the horizontal edges at both ends of the magnet are being polished.

[0027] Reference numerals: 10, fixing plate; 11, frame; 12, through hole; 2, grinding mechanism; 20, grinding roller; 21, H-shaped frame; 22, shaft seat; 23, actuator; 230, rotating shaft; 231, bevel gear set; 232, transmission shaft; 24, push-pull member; 240, connecting plate; 241, No. 1 cylinder; 3, fixing mechanism; 30, supporting plate; 31, lifting plate; 32, turntable; 33, limit plate; 3 4. Suction cup; 35. Module; 36. Push-pull rod; 4. Guide part; 40. Guide groove; 41. Guide column; 42. Support plate; 43. Connecting rod; 5. Driving part; 50. No. 2 cylinder; 51. Slide; 52. Gear; 53. Rack; 9. Pushing part; 90. Pressure rod; 91. Mounting plate; 92. Pressure roller; 60. Slide rod; 61. Sleeve; 62. No. 4 cylinder; 7. No. 3 cylinder; 8. Servo motor. DETAILED DESCRIPTION

[0028] To make the above-mentioned objects, features, and advantages of the present invention more readily apparent, specific embodiments of the present invention are described in detail below with reference to the accompanying drawings. The following description sets forth numerous specific details to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways than those described herein, and those skilled in the art may make similar modifications without departing from the scope of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0029] like Figure 1 As shown, an automatic surface treatment device for NdFeB magnets includes a fixing plate 10 and an inverted concave frame 11 installed at its front end; through holes 12 for feeding and discharging materials are respectively opened at the left and right ends of the frame 11, and a grinding mechanism 2 and a fixing mechanism 3 are provided on the frame 11.

[0030] like Figure 1 and Figure 2 As shown, the grinding mechanism 2 includes four rectangularly distributed grinding rollers 20, the axes of the upper and lower grinding rollers 20 are perpendicular to each other, and the grinding rollers 20 are slid left and right on the frame 11. The grinding mechanism 2 also includes a pushing part 9 for limiting the magnet so that it remains stable during grinding.

[0031] like Figure 1 、 Figure 2 and Figure 3 The cam 31 is provided with a lifting plate 31 for sliding up and down between the two vertical sections of the support plate 30, and a turntable 32 with a vertical axis is rotatably installed on the upper end of the lifting plate 31. Two left-right symmetrical limit plates 33 are fixedly installed on the upper end of the turntable 32, and a suction cup 34 with a horizontal rotation reference line is rotatably installed on the two limit plates 33. A module 35 is detachably installed on the upper end of the suction cup 34. The detachable installation method is adopted to facilitate the replacement of the module 35. When processing tile-shaped magnets, the upper end of the module 35 is an arc-shaped convex surface. When processing rectangular magnets, a module 35 with a flat upper end can be installed to ensure the fixing effect of the magnet, thereby improving the grinding quality. Two pairs of front-to-back symmetrical push-pull rods 36 are hingedly installed at the lower end of the suction cup 34. A guide part 4 and a driving part 5 for driving the guide part 4 to drive the suction cup 34 to rotate are provided on the turntable 32.

[0032] like Figure 2 As shown, the front end of the rear vertical section of the support plate 30 is fixedly installed with a No. 3 cylinder 7 whose telescopic section is fixedly connected to the lifting plate 31, and the lower end of the lifting plate 31 is fixedly installed with a servo motor 8 whose output shaft is fixedly connected to the turntable 32.

[0033] like Figures 1 to 6As shown, during specific operation, the NdFeB magnet surface automatic processing device is fixed to the processing area of ​​the existing square piece chamfering machine to replace the existing chamfering device, and the existing conveyors are set on the left and right sides of the magnet surface automatic processing device. A pusher is set on the right conveyor, and the pusher pushes the magnet conveyed by the right conveyor to the module 35, and then the suction cup 34 adsorbs and fixes the magnet through the module 35, and then the guide part 4 drives the suction cup 34 to rotate through the driving part 5. When the suction cup 34 rotates, the push-pull rod 36 moves accordingly under the action of the guide part 4. The setting of the push-pull rod 36 In order to improve the stability of the rotation of the suction cup 34, the suction cup 34 drives the magnet to rotate synchronously at a fixed angle, so that the arc edge of the magnet can always maintain normal vertical contact with the grinding roller 20, so that the cutting depth of the grinding roller 20 at the contact point with the arc edge of the magnet is constant, thereby ensuring that the chamfer width of the transition zone from the top of the magnet arc to the end is consistent, and then the No. 3 cylinder 7 pulls the lifting plate 31 upward, and the lifting plate 31 drives the fixed magnet to move up to the processing area, and the grinding mechanism 2 drives the rotating grinding roller 20 to move, so that the two grinding rollers 20 on the upper side respectively contact the outer arc edges at both ends of the magnet for grinding (such as Figure 5 As shown in the upper middle side view, during grinding, the suction cup 34 drives the magnet to rotate to ensure the integrity of the outer arc edge grinding of the magnet. Then the grinding mechanism 2 is reset first, and the lifting plate 31 moves down to the processing area. Then the grinding mechanism 2 moves, and the two grinding rollers 20 on the lower side synchronously grind and chamfer the inner arc edges of the left and right ends of the magnet (as shown in the upper middle view). Figure 5 (shown in lower middle side view).

[0034] After the arc edge grinding of the magnet is completed, the grinding mechanism 2 is reset first, and the servo motor 8 drives the turntable 32 to rotate 90 degrees so that the horizontal edge of the magnet corresponds to the grinding roller 20. Then the driving part 5 drives the guide part 4 to drive the suction cup 34 to rotate to adjust the grinding position of the magnet. Then the lifting plate 31 moves up to the processing area, and the corresponding single grinding roller 20 moves to contact the horizontal edge of the upper side of one end of the magnet for grinding (such as Figure 6 As shown in the upper middle view), the grinding mechanism 2 is reset first, and the lifting plate 31 is moved down to the processing area, and then the corresponding single grinding roller 20 is brought into contact with the lower horizontal edge of the end of the magnet for grinding (as shown in the upper middle view). Figure 6 (As shown in the lower-middle side view), follow the above steps to chamfer the two horizontal edges at the other end of the magnet.

[0035] After the horizontal edge of the magnet is polished, the polishing mechanism 2 is reset, and the servo motor 8 drives the turntable 32 to rotate in the opposite direction and reset. Then, the suction cup 34 releases its adsorption on the magnet, and the external pusher pushes the processed magnet to the left conveyor for transportation to the subsequent processing station. The pusher then pushes the magnet to be processed to the module 35 for further polishing. It should be noted that whether the horizontal edge or the arc edge of the magnet is polished, the grinding roller 20 moves toward the magnet after the magnet moves to the processing area.

[0036] like Figure 2 、 Figure 3 and Figure 4 As shown, the guide portion 4 includes an arc-shaped guide groove 40 opened on the limit plate 33, and the push-pull rod 36 is located between the two limit plates 33. The push-pull rod 36 in each pair is symmetrical on the left and right, and the opposite sections are hingedly installed with guide columns 41 that cooperate with the guide groove 40. A connecting rod 43 is fixedly installed between the two push-pull rods 36 of the same pair, and the opposite ends of the two limit plates 33 are rotatably installed with support plates 42. The two support plates 42 are fixedly installed at the lower end of the suction cup 34, and the rotation point of the support plate 42 is located on the vertical diameter line of the guide groove 40 but is not co-center with the guide groove 40.

[0037] like Figure 1 、 Figure 2 and Figure 3 As shown, the driving part 5 includes a No. 2 cylinder 50 fixedly mounted on the upper end of the turntable 32, and the telescopic section of the No. 2 cylinder 50 is fixedly mounted with a slide 51 slidably connected to the turntable 32, and a rack 53 is mounted on the upper end of the slide 51, and a gear 52 meshing with the rack 53 is coaxially mounted at the rotation point of one of the support plates 42.

[0038] like Figures 1 to 6 As shown, during operation, cylinder 50 pushes slide 51 forward and backward, which in turn drives rack 53. The movement of rack 53 causes gear 52 to rotate support plate 42, which in turn drives the magnet via suction cup 34. During this process, suction cup 34 drives push-pull rod 36, while guide post 41 moves along guide groove 40 for position limiting. The tilt of push-pull rod 36 changes relative to its initial state. When grinding the arc edge of the magnet, support plate 42 drives the magnet forward and backward via suction cup 34. When grinding the horizontal edge of the magnet, turntable 32 is first rotated 90 degrees so that the horizontal edge of the magnet aligns with grinding roller 20, effectively contacting the grinding roller 20. At this point, support plate 42 drives the magnet left and right via suction cup 34, thereby adjusting the position of the magnet's horizontal edge and ensuring the quality and effect of the chamfer.

[0039] like Figure 1 and Figure 2As shown, the grinding mechanism 2 also includes two slide grooves respectively opened on the left and right sides of the frame 11, and the slide grooves are located on the rear side of the through hole 12. An H-shaped frame 21 is slidably installed in the slide groove, and the two horizontal sections of the H-shaped frame 21 are fixedly installed with shaft seats 22 at one end close to the support plate 30. The grinding rollers 20 are rotatably installed on the corresponding shaft seats 22, and the axes of the upper and lower grinding rollers 20 on the same H-shaped frame 21 are perpendicular to each other.

[0040] like Figure 1 and Figure 2 As shown, the H-shaped frame 21 is provided with an actuator 23 for driving the grinding roller 20 to rotate. The actuator 23 includes a rotating shaft 230 rotatably mounted on the shaft seat 22. The rotating shaft 230 rotates through the vertical section of the H-shaped frame 21. The two rotating shafts 230 opposite to each other are connected by a bevel gear set 231. A transmission shaft 232 is rotatably mounted on the connecting plate 240. The transmission shaft 232 and a corresponding rotating shaft 230, and the grinding roller 20 and the corresponding rotating shaft 230 are all connected by belt transmission.

[0041] like Figure 1 and Figure 2 As shown, the frame 11 is equipped with a push-pull member 24 for pushing and pulling the H-shaped frame 21 to move. The push-pull member 24 includes a connecting plate 240. The two horizontal sections of the H-shaped frame 21 are fixedly installed with a connecting plate 240 at one end away from the lifting plate 31. The opposite surfaces of the two vertical sections of the frame 11 are fixedly installed with a No. 1 cylinder 241. The telescopic section of the No. 1 cylinder 241 slides through the frame 11 and is fixedly connected to the corresponding connecting plate 240.

[0042] like Figure 1 and Figure 2 As shown, an axis plate is fixedly installed at the front end of the frame 11, and two sliding rods 60 that are symmetrical on the left and right and are located below the horizontal section of the frame 11 are fixedly installed between the axis plate and the fixed plate 10. Two sliding sleeves 61 are slidably installed on the two sliding rods 60, and the lower end of the sliding sleeve 61 is fixedly connected to the upper end of the support plate 30. A No. 4 cylinder 62 is fixedly installed at the lower end of the horizontal section of the frame 11, and the telescopic section of the No. 4 cylinder 62 is fixedly connected to the front sleeve 61.

[0043] like Figure 1 、 Figure 4 、 Figure 5 and Figure 6 As shown, the pushing portion 9 includes pressure rods 90 symmetrically arranged on the front and rear sides of the grinding roller 20. The pressure rods 90 are fixedly mounted on the corresponding shaft seat 22, and a ball is provided at the end of the pressure rod 90. An inverted L-shaped mounting plate 91 is provided between the grinding roller 20 located on the lower side and the corresponding pressure rod 90. The mounting plate 91 is fixedly mounted on the corresponding shaft seat 22, and a pressure roller 92 located above the grinding roller 20 is rotatably mounted on the end of the mounting plate 91 away from the shaft seat 22.

[0044] like Figures 1 to 6 As shown, during specific operation, after the magnet moves to the processing area, the external motor installed on the connecting plate 240 drives the corresponding transmission shaft 232 to rotate, and the transmission shaft 232 drives the corresponding rotating shaft 230 to rotate through the corresponding belt, and the rotating shaft 230 drives the corresponding rotating shaft 230 to rotate through the bevel gear set 231, and the rotating shaft 230 drives the corresponding grinding roller 20 to rotate through the corresponding belt, and then, the No. 1 cylinder 241 pulls the corresponding H-shaped frame 21 to move toward the lifting plate 31 through the connecting plate 240, and then the grinding roller 20 moves toward the lifting plate 31.

[0045] When grinding the outer arc edges of both ends of the magnet, the lifting plate 31 drives the magnet to move to the processing area, and the two upper grinding rollers 20 contact the corresponding ends of the magnet at the same time. However, at this time, the pressure rods 90 corresponding to the two grinding rollers 20 do not contact the magnet. Under the action of the symmetrical pressing force exerted by the grinding rollers 20 on both sides, the magnet can maintain a relatively stable state with the suction cup 34 (see Figure 5 When the inner arc edges at both ends of the magnet are polished, the two lower grinding rollers 20 are in contact with the corresponding ends of the magnet at the same time, and the pressure rollers 92 corresponding to the two grinding rollers 20 are in contact with the upper end surface of the magnet, but the pressure rod 90 does not contact the magnet (see Figure 5 The lower middle side view) uses the left-right symmetrical pressure roller 92 to press against the upper end surface of the magnet and cooperate with the two grinding rollers 20 on the lower side to balance the force on the magnet, so that the magnet and the suction cup 34 remain in a relatively stable state.

[0046] When grinding the upper horizontal edge of the magnet end, the lifting plate 31 drives the magnet to move to the processing area, and one of the upper grinding rollers 20 contacts the corresponding horizontal edge, but the pressure rod 90 corresponding to this grinding roller 20 does not contact the magnet, and the ball on the pressure rod 90 corresponding to the other upper grinding roller 20 contacts the upper end surface of the magnet (see Figure 6 The upper middle side view) balances the force on the magnet, so that the magnet and the suction cup 34 remain relatively stable. When grinding the lower horizontal edge of the magnet end, one of the lower grinding rollers 20 contacts the corresponding horizontal edge, but the pressure rod 90 corresponding to this grinding roller 20 does not contact the magnet. The ball on the pressure rod 90 corresponding to the other lower grinding roller 20 contacts the upper end face of the magnet, and the pressure rollers 92 corresponding to the two lower grinding rollers 20 do not contact the magnet (see Figure 6 The purpose of the above operation is also to balance the force on the magnet so that the magnet and the suction cup 34 remain in a relatively stable state, thereby improving the grinding quality of the magnet and the grinding consistency of each edge, and avoiding under-grinding or over-cutting.

[0047] In addition, while the grinding roller 20 is grinding the horizontal edge of the magnet, the No. 4 cylinder 62 will push the support plate 30 back and forth through the sleeve 61, so that the horizontal edge of the magnet is completely ground by the corresponding grinding roller 20. After all processing is completed, the grinding mechanism 2 and the fixing mechanism 3 are reset, the suction cup 34 releases the fixation of the magnet, the magnet is pushed out, and the magnet to be processed is moved again to the module 35 to continue the grinding process.

[0048] In the description of the present invention, it should be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "horizontal, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of the present invention; the directional words "inside and outside" refer to the inside and outside relative to the outline of each component itself.

[0049] Furthermore, the terms "first," "second," "number one," and "number two" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature designated as "first," "second," "number one," or "number two" may explicitly or implicitly include at least one such feature. In the description of the present invention, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0050] In the description of the present invention, it should also be noted that, unless otherwise expressly specified or limited, the terms "disposed," "connected," "installed," and "connected" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; they may refer to mechanical connections or electrical connections; they may refer to direct connections or indirect connections through an intermediate medium; and they may refer to internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0051] The embodiments of this specific implementation method are all preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Therefore, any equivalent changes made based on the structure, shape, and principle of the present invention should be included in the scope of protection of the present invention.

Claims

1. An automatic surface treatment device for NdFeB magnets, comprising a fixed plate and an inverted concave frame mounted at its front end, characterized in that: The frame is provided with a grinding mechanism and a fixing mechanism; The grinding mechanism includes four rectangular grinding rollers and a push portion for restraining the magnet to keep it stable during grinding. The axes of the upper and lower grinding rollers are perpendicular to each other, and the grinding rollers are slidable left and right on the frame. The fixing mechanism includes a support plate that is slidably mounted in the frame forward and backward, a lifting plate that is slidably mounted in the support plate upward and downward, a turntable with a vertical axis rotatably mounted on the upper end of the lifting plate, two left-right symmetrical limit plates fixedly mounted on the upper end of the turntable, a suction cup with a horizontal rotation reference line rotatably mounted on the two limit plates, a module is provided on the upper end of the suction cup, and a guide portion and a driving portion for driving the guide portion to drive the suction cup to rotate at a fixed angle are provided on the turntable; When grinding the arc edge of the magnet, the drive unit drives the suction cup to rotate the magnet through the guide unit. During the rotation, the arc edge of the magnet is always in perpendicular contact with the normal of the corresponding grinding roller, and the grinding roller cuts the arc edge of the magnet at a constant depth. When grinding the horizontal edge of the magnet, the turntable rotates 90 degrees so that the horizontal edge of the magnet corresponds to the grinding roller. During the grinding process, the magnet is always under force balance under the action of the pushing part and maintains a stable position state with the suction cup.

2. The automatic surface treatment device for NdFeB magnets according to claim 1, characterized in that: The grinding mechanism also includes two slide grooves respectively opened on the left and right sides of the frame, and the slide grooves are located on the rear side of the through hole. An H-shaped frame is slidably installed in the slide groove. The two horizontal sections of the H-shaped frame are fixedly installed with shaft seats at one end close to the support plate, and the grinding roller is rotatably installed on the corresponding shaft seat.

3. The automatic surface treatment device for NdFeB magnets according to claim 2, characterized in that: The H-shaped frame is provided with an actuator for driving the grinding roller to rotate. The actuator includes a rotating shaft rotatably mounted on the shaft seat. The rotating shaft rotates through the vertical section of the H-shaped frame. The two rotating shafts opposite to each other are connected by a bevel gear set. A transmission shaft is rotatably mounted on the connecting plate. The transmission shaft and the corresponding rotating shaft, and the grinding roller and the corresponding rotating shaft are all connected by belt transmission.

4. The automatic surface treatment device for NdFeB magnets according to claim 2, characterized in that: The frame is equipped with a push-pull member for pushing and pulling the H-shaped frame, and the push-pull member includes a connecting plate. The two horizontal sections of the H-shaped frame are fixedly installed with a connecting plate at one end away from the lifting plate. The opposite surfaces of the two vertical sections of the frame are fixedly installed with a No. 1 cylinder. The telescopic section of the No. 1 cylinder slides through the frame and is fixedly connected to the corresponding connecting plate.

5. The automatic surface treatment device for NdFeB magnets according to claim 1, characterized in that: An axis plate is fixedly installed at the front end of the frame, and two sliding rods that are symmetrical on the left and right and are located below the horizontal section of the frame are fixedly installed between the axis plate and the fixed plate. Two sliding sleeves are slidably installed on the two sliding rods, and the lower end of the sliding sleeve is fixedly connected to the upper end of the support plate. A No. 4 cylinder is fixedly installed at the lower end of the horizontal section of the frame, and the telescopic section of the No. 4 cylinder is fixedly connected to the sliding sleeve on the front side.

6. The automatic surface treatment device for NdFeB magnets according to claim 1, characterized in that: The guide portion includes an arc-shaped guide groove opened on the limit plate. The lower end of the suction cup is hingedly installed with two pairs of front-to-back symmetrical push-pull rods located between the two limit plates. The push-pull rods in each pair are left-right symmetrical and the opposite sections are hingedly installed with guide columns that cooperate with the guide groove. The opposite ends of the two limit plates are rotatably installed with support plates, and the two support plates are fixedly installed at the lower end of the suction cup.

7. The automatic surface treatment device for NdFeB magnets according to claim 6, characterized in that: The driving part includes a No. 2 cylinder fixedly installed on the upper end of the turntable. The telescopic section of the No. 2 cylinder is fixedly installed with a slide that is slidably connected to the turntable. A rack is installed on the upper end of the slide. A gear that meshes with the rack is coaxially installed at the rotation point of one of the support plates.

8. The automatic surface treatment device for NdFeB magnets according to claim 1, characterized in that: A No. 3 air cylinder, whose telescopic section is fixedly connected to the lifting plate, is fixedly installed at the front end of the rear vertical section of the support plate, and a servo motor, whose output shaft is fixedly connected to the turntable, is fixedly installed at the lower end of the lifting plate.

9. The automatic surface treatment device for NdFeB magnets according to claim 6, characterized in that: The pushing part includes pressure rods symmetrically arranged on the front and rear sides of the grinding roller, the pressure rods are fixedly mounted on the corresponding shaft seats, an inverted L-shaped mounting plate is arranged between the grinding roller located on the lower side and the corresponding pressure rods, the mounting plate is fixedly mounted on the corresponding shaft seat, and a pressure roller located above the grinding roller is rotatably mounted on the end of the mounting plate away from the shaft seat.

10. The automatic surface treatment device for NdFeB magnets according to claim 9, characterized in that: A connecting rod is fixedly installed between the two push-pull rods in the same pair; and a ball is arranged at the end of the pressure rod.

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