Neodymium-iron-boron magnet surface automatic treatment device

Abstract

The invention relates to the technical field of surface treatment, in particular to an automatic surface treatment device for a neodymium-iron-boron magnet. Comprising a fixing plate and an inverted-concave-shaped frame installed at the front end of the fixing plate, and a grinding mechanism and a fixing mechanism are arranged on the frame; the polishing mechanism comprises four polishing rollers distributed in a rectangular mode and a pushing and pressing part used for limiting the magnet to enable the magnet to be kept stable in the polishing period. The position of the magnet is regulated and controlled through cooperation of the guide part and the driving part, so that the outer arc edge and the inner arc edge of the magnet are always kept in normal vertical contact with the grinding roller, and the problem of mismatching of a vertical feeding mode to curvature change is avoided. The mechanism that magnet position regulation and control are matched with real-time, continuous and stable magnet position is adopted, the problems of over-cutting and under-grinding are solved from two aspects of position regulation and control and position limitation, and then the quality and uniformity of magnet grinding are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of surface treatment, and particularly relates to an automatic surface treatment device for neodymium-iron-boron magnets. Background Art

[0002] Neodymium-iron-boron materials are widely used in new energy vehicles, wind power generation, consumer electronics and other fields due to their excellent magnetic properties. During the preparation of magnets, multiple surface treatment processes such as chamfering, electroplating, and phosphating are required. Among them, chamfering is to eliminate the acute angles, burrs, and microcracks on the edges of the magnets by grinding to avoid affecting subsequent phosphating. The magnets pushed are mainly fixed by a square sheet chamfering machine, and then the magnets move vertically and contact the grinding wheel for edge chamfering.

[0003] Currently, the following problems exist in the magnet processing: First, the vertical feeding method cannot adapt to the change of the arc surface curvature, resulting in over-cutting in the arc top area and under-grinding in the transition areas at both ends, causing uneven chamfer width, which in turn affects the uniformity of the subsequent phosphating treatment. There are problems such as easy peeling of the phosphating film layer in the over-cut area, and the sharp edges in the under-grinded area becoming the corrosion starting points due to missed plating, greatly reducing the protection life of the magnets. At the same time, the position stability of the magnets during grinding needs to be improved, and the stability of the magnets will directly affect the grinding quality and consistency, resulting in under-grinding or over-cutting.

[0004] Therefore, the problems that the vertical feeding method cannot adapt to the change of the arc surface curvature and the insufficient position stability of the magnets during grinding, which are likely to cause under-grinding or over-cutting, are the technical problems that need to be solved by those skilled in the art. Summary of the Invention

[0005] In view of the above problems, the embodiments of the present invention provide an automatic surface treatment device for neodymium-iron-boron 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 slidably installed up and down in the supporting plate, a turntable with a vertical axis rotatably installed at the upper end of the lifting plate, and two There are two symmetrical limit plates, and suction cups with a horizontal rotation reference line are installed on the two limit plates for common rotation. A module is arranged 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 arranged on the turntable; when the arc edge of the magnet is being ground, the driving part drives the suction cup to rotate through the guide part, and the arc edge of the magnet is always in vertical contact with the normal of the corresponding grinding roller during the rotation, 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 being ground, the turntable rotates ninety degrees so that the horizontal edge of the magnet corresponds to the grinding roller; during the grinding, the magnet is always under force balance under the action of the pushing part and maintains a stable position state 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 groove is located on the rear side of the through hole, an H-shaped frame is slidably installed in the slide groove, and 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 a shaft seat, the rotating shaft rotates through the vertical section of the H-shaped frame, and 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, and the transmission shaft and a corresponding rotating shaft, and the grinding roller and the corresponding rotating shaft are all connected by belt transmission.

[0009] As a preferred solution, a push-pull member for pushing and pulling the H-shaped frame is installed on the frame, and the push-pull member includes a connecting plate. The two horizontal sections of the H-shaped frame are commonly 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 guiding part includes a guiding groove which is arc-shaped and formed on the limiting plate. The lower end of the suction cup is hinged with two pairs of symmetric push-pull rods in the front and back direction located between the two limiting plates. The push-pull rods in each pair are symmetric left and right, and guide columns which are matched with the guiding groove are hinged to the back segments of each pair of push-pull rods. Support plates are rotatably installed at the opposite ends of the two limiting 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 second cylinder fixedly installed at the upper end of the turntable. The telescopic section of the second cylinder is fixedly installed with a sliding seat which is slidably connected to the turntable. A rack is installed at the upper end of the sliding seat, and a gear which is meshed with the rack is coaxially installed at the rotation point of one of the support plates.

[0013] As a preferred solution, a third cylinder with a telescopic section fixedly connected to the lifting plate is fixedly installed at the front end of the vertical section at the rear side of the support plate. A servo motor with an output shaft fixedly connected to the turntable is fixedly installed at the lower end of the lifting plate.

[0014] As a preferred solution, the pressing part includes pressing rods symmetrically arranged on the front and back sides of the grinding roller. The pressing rods are fixedly installed on the corresponding shaft seats. An inverted L-shaped mounting plate is arranged between the lower grinding roller and the corresponding pressing rod. The mounting plate is fixedly installed on the corresponding shaft seat, and a pressing roller located above the grinding roller is rotatably installed at the end of the mounting plate far 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; balls are arranged at the ends of the pressing rods.

[0016] One or more of the above technical solutions in the embodiments of the present invention have at least one of the following technical effects: First, the present invention adjusts and controls the position of the magnet through the cooperation of the guiding part and the driving part, so that the outer arc side and the inner arc side of the magnet always maintain a normal vertical contact with the grinding roller, thereby avoiding the mismatch problem of the curvature change in the vertical feeding mode, ensuring that the chamfer width in the transition area from the arc top to the end is consistent, eliminating the risk of film layer stress peeling in the over-cut area and sharp edge non-plating in the under-grinding area, and ensuring uniform coverage of the subsequent phosphating film.

[0017] Second, while the outer arc side and the inner arc side of the magnet always maintain a normal vertical contact with the grinding roller, the present invention also applies a force to the magnet in the direction opposite to the force application direction of the grinding roller through the pressing part during the period when the magnet is being ground by the grinding roller, so as to balance the force on the magnet, ensure that the relative positions of the magnet, the grinding roller and the suction cup always remain stable, and avoid under-grinding or over-cutting caused by the offset of the magnet, resulting in a reduction in the grinding quality, consistency and uniformity of the arc side and horizontal side of the magnet.

[0018] III. The present invention adopts a mechanism that combines magnet position regulation with real-time, continuous, and stable magnet position, starting from both position regulation and position limitation to solve the problems of over-cutting 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 given in part in the following description, will become apparent in part from the following description, or will be understood through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or in the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on the provided drawings.

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

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

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

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

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

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

[0027] Reference numerals: 10, fixed 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, first cylinder; 3, fixing mechanism; 30, support plate; 31, lifting plate; 32, turntable; 33, limiting plate; 34, suction cup; 35, module; 36, push rod; 4, guiding part; 40, guiding groove; 41, guide post; 42, support plate; 43, connecting rod; 5, driving part; 50, second cylinder; 51, sliding seat; 52, gear; 53, rack; 9, pressing part; 90, pressure rod; 91, mounting plate; 92, pressing roller; 60, sliding rod; 61, sliding sleeve; 62, fourth cylinder; 7, third cylinder; 8, servo motor. DETAILED DESCRIPTION

[0028] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present invention, so the present invention is not limited by 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 slidably arranged on the frame 11 left and right. The grinding mechanism 2 also includes a pushing portion 9 for limiting the magnet to keep it stable during grinding.

[0031] like Figure 1 , Figure 2 and Figure 3 As shown, the fixing mechanism 3 includes a support plate 30 which is slidably installed in the frame 11 and is in an inverted concave shape. A lifting plate 31 is slidably installed up and down between the two vertical sections of the support plate 30. 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. 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 a tile-shaped magnet, the upper end of the module 35 is an arc-shaped convex surface. When processing a rectangular magnet, 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 portion 4 and a driving portion 5 for driving the guide portion 4 to drive the suction cup 34 to rotate are provided on the turntable 32.

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

[0033] like Figures 1 to 6As shown, during actual operation, the NdFeB magnet surface automatic processing device is fixed to the processing area of an existing square chip chamfering machine to replace the existing chamfering device. Conveyors are provided on both the left and right sides of the magnet surface automatic processing device. A pusher is provided on the right conveyor. The pusher pushes the magnets conveyed by the right conveyor onto module 35. Then, the suction cup 34 adsorbs and fixes the magnet via module 35. Subsequently, the driving part 5 causes the guiding part 4 to drive the suction cup 34 to rotate. When the suction cup 34 rotates, the push-pull rod 36 makes a limited movement under the action of the guiding part 4. The push-pull rod 36 is provided to improve the stability of the rotation of the suction cup 34. The suction cup 34 drives the magnet to rotate synchronously by a fixed angle, so that the arc edge of the magnet can always maintain a normal vertical contact with the grinding roller 20, thereby making the cutting depth at the contact point between the grinding roller 20 and the arc edge of the magnet constant, and further ensuring that the chamfer width in the transition area from the arc top to the end of the magnet is consistent. Subsequently, the third cylinder 7 pulls the lifting plate 31 upward, and the lifting plate 31 drives the fixed magnet to move upward to the processing area. The grinding mechanism 2 drives the rotating grinding roller 20 to move, so that the two upper grinding rollers 20 respectively contact and grind the outer arc edges at both ends of the magnet (as shown in the upper side view in Figure 5 ). During grinding, the suction cup 34 drives the magnet to rotate to ensure the integrity of the grinding of the outer arc edge of the magnet. After that, the grinding mechanism 2 first resets, and then the lifting plate 31 moves downward to the processing area. Then, the grinding mechanism 2 moves, and the two lower grinding rollers 20 synchronously grind and chamfer the inner arc edges at both left and right ends of the magnet (as shown in the lower side view in Figure 5 ).

[0034] After the arc edge of the magnet is ground, the grinding mechanism 2 first resets, and then the servo motor 8 drives the turntable 32 to rotate by 90 degrees, so that the horizontal edge of the magnet corresponds to the grinding roller 20. Then, the driving part 5 causes the guiding part 4 to drive the suction cup 34 to rotate to adjust the grinding position of the magnet. Then, the lifting plate 31 moves upward to the processing area, and the corresponding single grinding roller 20 moves to contact and grind the upper horizontal edge of a single end of the magnet (as shown in the upper side view in Figure 6 ). Then, the grinding mechanism 2 first resets, and the lifting plate 31 then moves downward to the processing area. Subsequently, the corresponding single grinding roller 20 is brought into contact with the lower horizontal edge of this end of the magnet for grinding (as shown in the lower side view in Figure 6 ). Subsequently, the chamfering and grinding of the two horizontal edges at the other end of the magnet are carried out according to the above operations.

[0035] After the horizontal edges of the magnet are polished, the polishing mechanism 2 resets, the servo motor 8 drives the turntable 32 to rotate reversely to reset, then the suction cup 34 releases the adsorption of the magnet, and the external pusher pushes the processed magnet onto the left conveyor to be transported to the subsequent processing station. After that, the pusher pushes the magnet to be processed onto the module 35 to continue the polishing process. It should be noted that whether it is the horizontal edge or the arc edge of the magnet being polished, after the magnet moves to the processing area, the polishing roller 20 moves towards the magnet.

[0036] As Figure 2 , Figure 3 and Figure 4 shown, the guiding part 4 includes an arc-shaped guiding groove 40 formed on the limiting plate 33. The push-pull rod 36 is located between the two limiting plates 33. The push-pull rods 36 in each pair are symmetric left and right, and guide columns 41 cooperating with the guiding groove 40 are hingedly installed on the back segments. A connecting rod 43 is fixedly installed between the two push-pull rods 36 in the same pair. Rotating supports 42 are rotatably installed at the opposite ends of the two limiting plates 33. The two rotating supports 42 are fixedly installed at the lower end of the suction cup 34. The rotation point of the rotating support 42 is located on the vertical diameter line of the guiding groove 40 but not at the common center of the guiding groove 40.

[0037] As Figure 1 , Figure 2 and Figure 3 shown, the driving part 5 includes a second cylinder 50 fixedly installed at the upper end of the turntable 32. The telescopic section of the second cylinder 50 is fixedly installed with a sliding seat 51 slidably connected to the turntable 32. A rack 53 is installed at the upper end of the sliding seat 51. A gear 52 meshing with the rack 53 is coaxially installed at the rotation point of one of the rotating supports 42.

[0038] As Figures 1 to 6 shown, during specific operation, the second cylinder 50 pushes the sliding seat 51 to move in the front-rear direction. The sliding seat 51 drives the rack 53 to move. The movement of the rack 53 causes the gear 52 to drive the rotating support 42 to rotate. The rotating support 42 drives the magnet to rotate through the suction cup 34. During this process, the suction cup 34 drives the push-pull rod 36 to move, and the guide column 41 makes a limiting movement along the guiding groove 40, and the inclination state of the push-pull rod 36 changes relative to the initial state. When polishing the arc edge of the magnet, the rotating support 42 drives the magnet to rotate in the front-rear direction through the suction cup 34. When the horizontal edge of the magnet needs to be polished, first the turntable 32 rotates by 90 degrees to align the horizontal edge of the magnet with the polishing roller 20, so that the horizontal edge of the magnet can effectively contact the polishing roller 20. At this time, the rotating support 42 drives the magnet to rotate in the left-right direction through the suction cup 34 to adjust the position of the horizontal edge of the magnet and ensure the quality and effect of the chamfering.

[0039] As 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 groove is located at the rear side of the through hole 12, an H-shaped frame 21 is slidably installed in the slide groove, and two horizontal sections of the H-shaped frame 21 are respectively fixedly installed with shaft seats 22 at one end close to the support plate 30, and the grinding roller 20 is rotatably installed on the corresponding shaft seat 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, and the actuator 23 includes a rotating shaft 230 rotatably mounted on the shaft seat 22, the rotating shaft 230 rotates and passes through the vertical section of the H-shaped frame 21, and the two rotating shafts 230 opposite to each other are connected by a bevel gear set 231, and a transmission shaft 232 is rotatably mounted on the connecting plate 240, and 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, a push-pull member 24 for pushing and pulling the H-shaped frame 21 is installed on the frame 11, and 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 together, 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 sliding sleeve 61 on the front side.

[0043] like Figure 1 , Figure 4 , Figure 5 and Figure 6 As shown, the pushing portion 9 includes a pressure rod 90 symmetrically arranged on the front and rear sides of the grinding roller 20, the pressure rod 90 is fixedly mounted on the corresponding shaft seat 22, and a ball is arranged at the end of the pressure rod 90, an inverted L-shaped mounting plate 91 is arranged 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 one end of the mounting plate 91 away from the shaft seat 22.

[0044] As Figures 1 to 6 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. The transmission shaft 232 drives the corresponding rotating shaft 230 to rotate through the corresponding belt. The rotating shaft 230 drives the corresponding rotating shaft 230 to rotate through the bevel gear set 231. The rotating shaft 230 drives the corresponding grinding roller 20 to rotate through the corresponding belt. Then, the first cylinder 241 pulls the corresponding H-shaped frame 21 towards the lifting plate 31 through the connecting plate 240, and then moves the grinding roller 20 towards the lifting plate 31.

[0045] When grinding the outer arc edges at both ends of the magnet, after the lifting plate 31 drives the magnet to move to the processing area, the two upper grinding rollers 20 simultaneously contact the corresponding ends of the magnet. 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 symmetric pressing forces applied by the bilateral grinding rollers 20, the magnet can maintain a relatively stable state with the suction cup 34 (refer to Figure 5 the upper side view in Figure 5 ); when grinding the inner arc edges at both ends of the magnet, the two lower grinding rollers 20 simultaneously contact the corresponding ends of the magnet, and the pressure rollers 92 corresponding to the two grinding rollers 20 abut against the upper end surface of the magnet, but the pressure rods 90 do not contact the magnet (refer to

[0046] the lower side view in Figure 6 ). By using the left-right symmetric pressure rollers 92 to abut against the upper end surface of the magnet and cooperating with the two lower grinding rollers 20, the force on the magnet is balanced, so that the magnet maintains a relatively stable state with the suction cup 34. Figure 6 When grinding the upper horizontal edge at the end of the magnet, after the lifting plate 31 drives the magnet to move to the processing area, one of the upper grinding rollers 20 abuts against the corresponding horizontal edge. However, 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 abuts against the upper end surface of the magnet (refer to

[0047] Figure 6 the upper side view in Figure 6 ). In this way, the force on the magnet is balanced, so that the magnet maintains a relatively stable state with the suction cup 34. When grinding the lower horizontal edge at the end of the magnet, one of the lower grinding rollers 20 abuts against the corresponding horizontal edge. However, 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 lower grinding roller 20 abuts against the upper end surface of the magnet, and the pressure rollers 92 corresponding to the two lower grinding rollers 20 do not contact the magnet (refer to

[0047] Figure 6 the lower upper side view in

[0047] ). The purpose of the above operations is also to balance the force on the magnet, so that the magnet maintains a relatively stable state with the suction cup 34, thereby improving the grinding quality of the magnet and the grinding consistency of each side, and avoiding under-grinding or over-cutting.

[0047] In addition, during the period when the grinding roller 20 grinds the horizontal edges of the magnet, the fourth cylinder 62 will push the support plate 30 to move back and forth through the sliding sleeve 61, so that the horizontal edges of the magnet completely pass through the corresponding grinding roller 20 to be ground. After all the 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 of the material, and the magnet to be processed moves to the module 35 again to continue the grinding process.

[0048] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by orientation words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" is usually based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description. Without contrary explanation, these orientation words do not indicate and imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, so it cannot be understood as a limitation on the protection scope of the present invention; the orientation words "inside, outside" refer to the inside and outside relative to the contour of each component itself.

[0049] In addition, the terms "first", "second", "No. 1", "No. 2" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first", "second", "No. 1", "No. 2" may explicitly or implicitly include at least one of such features. In the description of the present invention, the meaning of "a plurality" is 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 clearly specified and limited, the terms "set", "connected", "installed", "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0051] The embodiments of the specific implementation manners are all preferred embodiments of the present invention, and do not limit the protection scope of the present invention accordingly. Therefore, all equivalent changes made according to the structure, shape, and principle of the present invention should be covered within the protection scope of the present invention.

Claims

1. An automatic surface treatment device for NdFeB magnets, comprising a fixing plate and a concave-shaped frame mounted at the front end thereof, characterized in that: The frame is provided with a grinding mechanism and a fixing mechanism; The grinding mechanism includes four rectangularly distributed grinding rollers and a push portion for limiting 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 slidably arranged on the frame. The fixing mechanism comprises a support plate which is slidably mounted in the frame forward and backward, a lifting plate is slidably mounted in the support plate upward and downward, a turntable with a vertical axis is rotatably mounted on the upper end of the lifting plate, two left-right symmetrical limit plates are fixedly mounted on the upper end of the turntable, a suction cup with a horizontal rotation reference line is rotatably mounted on the two limit plates, a module is arranged 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 arranged on the turntable; When grinding the arc edge of the magnet, the driving part drives the suction cup to rotate the magnet through the guide part. During the rotation, the arc edge of the magnet is always in vertical 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 grinding the horizontal edge of the magnet, the turntable rotates ninety degrees to make the horizontal edge of the magnet correspond to the grinding roller; During grinding, 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 neodymium iron boron 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 groove is located at the rear side of the through hole, an H-shaped frame is slidably installed in the slide groove, and 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. An automatic surface treatment device for neodymium iron boron magnets according to claim 2, characterized in that: The H-shaped frame is provided with an actuator for driving the grinding roller to rotate, and the actuator includes a rotating shaft rotatably installed on the shaft seat, the rotating shaft rotates and passes through the vertical section of the H-shaped frame, and the two rotating shafts opposite to each other are connected by a bevel gear set. A transmission shaft is rotatably installed on the connecting plate, and the transmission shaft and a corresponding rotating shaft, and the grinding roller and the corresponding rotating shaft are all connected by belt transmission.

4. The automatic processing device for the surface of a neodymium iron boron magnet according to claim 2, characterized in that: The frame is provided with a push-pull member for pushing and pulling the H-shaped frame to move, the push-pull member includes a connecting plate, the two horizontal sections of the H-shaped frame are fixedly provided 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 provided with a No. 1 cylinder, and 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 a neodymium iron boron magnet according to claim 1, wherein: An axis plate is fixedly installed at the front end of the frame, and two sliding rods are fixedly installed between the axis plate and the fixed plate and are symmetrical on the left and right and are located below the horizontal section of the frame. 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 neodymium iron boron magnets according to claim 1, characterized in that: The guide portion includes an arc-shaped guide groove opened on the limit plate. Two pairs of front-to-back symmetrical push-pull rods located between the two limit plates are hingedly installed at the lower end of the suction cup. 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. An automatic surface treatment device for a neodymium iron boron magnet according to claim 6, characterized in that: 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 seat slidably connected to the turntable, and a rack is installed on the upper end of the slide seat. A gear meshing with the rack is coaxially installed at the rotation point of one of the support plates.

8. An automatic surface treatment device for neodymium iron boron magnets according to claim 1, characterized in that: At the front end of the vertical section at the rear side of the support plate, a third cylinder with a telescopic section fixedly connected to the lifting plate is fixedly installed, and a servo motor with an output shaft fixedly connected to the turntable is fixedly installed at the lower end of the lifting plate.

9. An automatic surface treatment device for neodymium iron boron magnets according to claim 6, characterized in that: The pressing part includes pressing rods symmetrically arranged on the front and rear sides of the grinding roller. The pressing rods are fixedly installed on the corresponding shaft seats. An inverted L-shaped mounting plate is arranged between the lower grinding roller and the corresponding pressing rod. The mounting plate is fixedly installed on the corresponding shaft seat, and a pressing roller located above the grinding roller is rotatably installed at the end of the mounting plate away from the shaft seat.

10. An automatic surface treatment device for a neodymium iron boron magnet according to claim 9, characterized in that: A connecting rod is fixedly installed between two push-pull rods of the same pair; balls are arranged at the ends of the pressing rods.

Images