Mim product deburring device

Abstract

The utility model discloses a kind of MIM product trimming device, it is related to MIM product technical field, including polishing mechanism, the motor is fixedly installed in polishing mechanism outer wall, the screw rod is fixedly installed in motor driving end, the inner thread block is threadedly connected in screw rod outer wall, the inner thread block top is fixedly installed with sliding plate, and the sliding plate bottom is slidably connected with polishing mechanism top, the sliding plate top is fixedly installed with adjusting mechanism, the adjusting mechanism top is fixedly installed with bottom plate, and the bottom plate top is fixedly installed with fixed mechanism;In the utility model, 90 degrees intermittent rotation is realized by motor cooperation intermittent disc, it is guaranteed that each straight edge and polishing rod always keep parallel polishing, 90 degrees intermittent rotation is realized by the accurate cooperation of chute and slider Fixed-angle switching, avoid speed fluctuation and positioning deviation, make straight edge parallelism error control in reasonable range, reduce product rejection rate caused by polishing inclination.

Description

Technical Field

[0001] This utility model relates to the field of MIM product technology, specifically to a trimming device for MIM products. Background Technology

[0002] MIM (Metal Injection Molding) technology, with its near-net-shape forming advantage, has been widely used in the mass production of metal back covers for mobile phones. As a core appearance and structural component, the back cover of a mobile phone consists of four regular straight edges and corner transition structures. After molding, it usually needs to be trimmed to remove excess flash, burrs, etc., to ensure the dimensional accuracy and appearance quality of the product.

[0003] In the prior art, such as the MIM product trimming device disclosed in CN220128362U, a workbench is provided. A slide groove is provided on one side of the top of the workbench. A driving component is installed inside the slide groove. A U-shaped frame is driven and connected to the driving component. A fixing component is installed on the U-shaped frame. A dust cover is fixedly connected to one side of the workbench.

[0004] However, in the application document published under the publication number CN220128362U, the motor directly drives the fixing parts and the clamped product to rotate in order to achieve multi-position edge trimming. However, the four straight edges of the back cover of the mobile phone need to be kept parallel to the grinding part for straight grinding. The motor rotation drive method is prone to problems such as speed fluctuation and positioning offset, which causes the straight edges to tilt during grinding, directly destroying the parallelism of the straight edges and causing the product to be scrapped.

[0005] In view of the above, this application is hereby submitted. Utility Model Content

[0006] The purpose of this invention is to provide a trimming device for MIM products to solve the problems mentioned in the background art.

[0007] To solve the above technical problems, this utility model provides a trimming device for MIM products, including a grinding mechanism. A motor is fixedly installed on the outer wall of the grinding mechanism, and a screw is fixedly installed on the drive end of the motor. An internal thread block is threadedly connected to the outer wall of the screw. A sliding plate is fixedly installed on the top of the internal thread block. The bottom of the sliding plate is slidably connected to the top of the grinding mechanism. An adjustment mechanism is fixedly installed on the top of the sliding plate. A base plate is fixedly installed on the top of the adjustment mechanism. A fixing mechanism is fixedly installed on the top of the base plate. The locking mechanism is fixed at the center of the inner wall of the fixing mechanism.

[0008] The adjustment mechanism includes a base column, which is fixedly connected to the top of the slide plate. An intermittent plate is rotatably mounted on the outer wall of the top of the base column. The inner wall of the intermittent plate has four sliding grooves, with an angle of 90 degrees between the four sliding grooves. A slider is slidably abutted against the inner wall of one of the sliding grooves. A connecting rod is rotatably mounted on the top of the slider. The side end of the connecting rod is fixedly mounted on the motor drive end. The bottom of the motor is fixedly connected to the top of the slide plate. A connecting plate is fixedly located at the center of the top of the intermittent plate. The top of the connecting plate is fixedly connected to the base plate.

[0009] Furthermore, the locking mechanism includes an outer fixing tube, which is fixedly connected to the center of the top of the limiting rod. A bottom block is fixedly installed on the bottom of the inner wall of the outer fixing tube, and a locking rod is rotatably installed on the outer wall of the bottom block. The top of the locking rod is slidably connected to the locking post. A sliding post is fixedly installed on the top of the bottom block, and the outer wall of the sliding post is slidably connected to the inner wall of the locking post. A spring is provided on the outer wall of the sliding post, and the top and bottom of the spring are fixedly connected to the opposite surfaces of the bottom block and the locking post, respectively. A guide groove is opened on the outer wall of the locking post, and a locking block is fixedly installed on the inner wall of the guide groove. A rotating post is rotatably installed on the top of the locking post, and a spiral groove is opened on the outer wall of the rotating post. A guide post is slidably installed on the inner wall of the spiral groove, and the side end of the guide post is fixedly connected to the top of the inner wall of the outer fixing tube.

[0010] Furthermore, a U-shaped plate is fixedly installed on the side of the polishing mechanism away from the motor, and a polishing rod is rotatably installed on the inner wall of the U-shaped plate. Diamond polishing particles are evenly distributed on the outer wall of the polishing rod, and the length of the polishing rod is not less than the side length of the back cover of the mobile phone.

[0011] Furthermore, the fixing mechanism includes a limiting rod, which is fixedly connected to the top of the base plate. Fixing plate one and fixing plate two are slidably installed at both ends of the outer wall of the limiting rod, and the internal structures of fixing plate one and fixing plate two are the same.

[0012] The fixing plate includes a limiting block, which is slidably connected to the outer wall of the limiting rod. Edge support blocks are fixedly installed on both sides of the limiting block. A support rod is rotatably installed at the top center of the limiting block. A double-headed connecting shaft is rotatably installed at the side end of the support rod. The center of the double-headed connecting shaft is fixedly connected to the locking mechanism.

[0013] Furthermore, the height of the connecting plate exceeds the top of the connecting rod by 5mm, the bottom of the base plate does not contact the connecting rod, the inner wall of the edge support block is an arc-shaped structure adapted to the inner wall of the phone back cover, and the end of the edge support block is designed with rounded corners.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] 1. The motor, in conjunction with the intermittent disc, achieves 90-degree intermittent rotation, ensuring that each straight edge remains parallel to the grinding rod during grinding. The 90-degree intermittent rotation is achieved by the precise cooperation of the slide and the slider to switch fixed angles, avoiding speed fluctuations and positioning offsets. This keeps the parallelism error of the straight edges within a reasonable range and reduces the product scrap rate caused by grinding tilt.

[0016] 2. Through the linkage design of the locking mechanism and the fixing mechanism, pressing the product can achieve the centering and clamping of the edge support block from the inner wall. With the mechanical locking of the clamping rod and the locking block, the product is ensured to have no displacement during the trimming process, ensuring the trimming consistency of each product in mass production, and solving the problem of precision difference caused by the unstable clamping of the existing device. Attached Figure Description

[0017] Figure 1 A schematic diagram of the front structure of a trimming device for MIM products;

[0018] Figure 2 A schematic diagram of the connection structure between the fixing mechanism and the adjusting mechanism of a trimming device for MIM products;

[0019] Figure 3 This is an enlarged schematic diagram of the fixing mechanism of a trimming device for MIM products.

[0020] Figure 4 A magnified schematic diagram of the adjustment mechanism of a trimming device for MIM products;

[0021] Figure 5 A schematic diagram of the internal structure of the locking mechanism of a trimming device for MIM products;

[0022] Figure 6 This is an enlarged schematic diagram of the grinding mechanism of a trimming device for MIM products.

[0023] In the diagram: 1. Grinding mechanism; 11. Screw; 12. Motor; 13. Grinding rod; 14. U-shaped plate; 2. Base plate; 3. Fixing mechanism; 31. Limiting rod; 32. Fixing plate one; 321. Limiting block; 322. Edge support block; 323. Support rod; 33. Fixing plate two; 34. Double-headed connecting shaft; 4. Locking mechanism; 41. Outer fixing tube; 411. Guide column; 42. Base block; 43. Locking rod; 44. Spring; 45. Sliding column; 46. Locking column; 461. Guide groove; 462. Locking block; 47. Rotating column; 471. Spiral groove; 5. Slide plate; 51. Internal threaded block; 6. Adjusting mechanism; 61. Intermittent plate; 62. Sliding groove; 63. Base column; 64. Connecting plate; 65. Motor; 66. Connecting rod; 67. Slider. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] Please see Figures 1-6 This utility model provides a technical solution: a trimming device for MIM products, including a grinding mechanism 1. A motor 12 is fixedly installed on the outer wall of the grinding mechanism 1, and a screw 11 is fixedly installed on the drive end of the motor 12. An internal thread block 51 is threadedly connected to the outer wall of the screw 11. Through the threaded transmission between the screw 11 and the internal thread block 51 driven by the motor 12, the rotational motion can be converted into a smooth linear feed of the slide plate 5, ensuring that each straight edge of the product remains parallel to the grinding part of the grinding mechanism 1, fundamentally avoiding tilted grinding; A sliding plate 5 is fixedly mounted on the top of the threaded block 51. The bottom of the sliding plate 5 is slidably connected to the top of the grinding mechanism 1. An adjustment mechanism 6 is fixedly mounted on the top of the sliding plate 5. The adjustment mechanism 6 includes a base column 63, which is fixedly connected to the top of the sliding plate 5. An intermittent plate 61 is rotatably mounted on the outer wall of the top of the base column 63. The inner wall of the intermittent plate 61 has four sliding grooves 62, with an angle of 90 degrees between the four sliding grooves 62. The adjustment mechanism 6, through the cooperation of the motor 65, connecting rod 66, slider 67 and intermittent plate 61, utilizes the four 90-degree distributed sliding grooves. 62 enables intermittent rotation at a fixed angle, replacing the existing continuous rotation mode, allowing the four straight edges of the product to switch precisely and sequentially, ensuring parallelism accuracy and achieving all-around edge trimming. A slider 67 slides against the inner wall of one of the grooves 62. A connecting rod 66 is rotatably mounted on the top of the slider 67, and the side end of the connecting rod 66 is fixedly mounted on the drive end of the motor 65. The bottom of the motor 65 is fixedly connected to the top of the slide plate 5. The rotational connection between the intermittent disk 61 and the bottom column 63, and the sliding contact between the slider 67 and the groove 62, allow for a 90-degree rotation angle. With minimal error, the alignment accuracy after switching each straight edge is guaranteed, avoiding missed grinding or repeated grinding due to positioning offset; a connecting plate 64 is fixed at the top center of the intermittent plate 61, and the top of the connecting plate 64 is fixedly connected to the base plate 2; the base plate 2 is fixedly installed on the top of the adjustment mechanism 6, and a fixing mechanism 3 is fixedly installed on the top of the base plate 2; a locking mechanism 4 is fixed at the center of the inner wall of the fixing mechanism 3; through the coordinated control of the motor 12 and the motor 65, the continuous trimming operation of the four straight edges can be completed without frequent manual adjustment of the product position.

[0026] Please see Figures 1-6This utility model provides a technical solution: a trimming device for MIM products, including a fixing mechanism 3 including a limiting rod 31, the limiting rod 31 being fixedly connected to the top of the base plate 2, providing stable sliding guidance for fixing plate one 32 and fixing plate two 33, ensuring that the two slide synchronously in opposite directions along the limiting rod 31; fixing plate one 32 and fixing plate two 33 are slidably installed at both ends of the outer wall of the limiting rod 31, the internal structure of fixing plate one 32 and fixing plate two 33 is the same and can slide flexibly along the limiting rod 31, and can be adapted to rectangular MIM products of different sizes by adjusting the sliding stroke; fixing plate one 32 includes a limiting block 321, the limiting block 321 being slidably connected to the outer wall of the limiting rod 31, and edge support blocks are fixedly installed on both sides of the limiting block 321. 322, the edge support block 322 can provide multi-point support from the inner wall of the product, increasing the contact area. A support rod 323 is rotatably installed at the top center of the limiting block 321. A double-headed connecting shaft 34 is rotatably installed on the side end of the support rod 323. With the rotation linkage of the double-headed connecting shaft 34 and the support rod 323, the edge support blocks 322 of the two fixed plates can be driven to symmetrically abut against the inner wall of the product, realizing the centering and positioning of the product, avoiding clamping offset that would cause the straight edge to be non-parallel to the grinding part, ensuring the trimming accuracy from the clamping end. Moreover, the sliding connection between the limiting block 321 and the limiting rod 31, and the rotational connection between the support rod 323 and the double-headed connecting shaft 34 and the limiting block 321, make the clamping force evenly transmitted to the edge support block 322. The center of the double-headed connecting shaft 34 is fixedly connected to the locking mechanism 4.

[0027] Please see Figures 1-6 This utility model provides a technical solution: a trimming device for MIM products, including a locking mechanism 4 comprising an outer fixing tube 41, which is fixedly connected to the top center of a limiting rod 31, providing a stable installation foundation for the entire locking mechanism 4; a base block 42 is fixedly installed on the bottom of the inner wall of the outer fixing tube 41, and a locking rod 43 is rotatably installed on the outer wall of the base block 42; the top of the locking rod 43 is slidably connected to a locking post 46; the sliding connection between the locking rod 43 and the locking post 46, and the cooperation between the guide groove 461 and the locking block 462, cause the locking rod 43 to move down after the locking post 46. It can accurately engage with the locking block 462 to complete mechanical locking; a sliding post 45 is fixedly installed on the top of the bottom block 42, and the outer wall of the sliding post 45 is slidably connected to the inner wall of the locking post 46. A spring 44 is provided on the outer wall of the sliding post 45, and the top and bottom of the spring 44 are fixedly connected to the opposite surfaces of the bottom block 42 and the locking post 46, respectively. When locking, the spring 44 is compressed and stores elastic potential energy. When unlocking, the elastic deformation of the spring 44 pushes the locking post 46 to move automatically upward without the need for additional tools or manual reset; a guide groove 461 is opened on the outer wall of the locking post 46, and a locking block 462 is fixed on the inner wall of the guide groove 461.

[0028] Please see Figures 1-6This utility model provides a technical solution: a trimming device for MIM products, including a rotating post 47 rotatably mounted on the top of a locking post 46, the rotating post 47 being rotatably connected to the locking post 46, a spiral groove 471 on the outer wall of the rotating post 47, and a guide post 411 slidably mounted on the inner wall of the spiral groove 471. The spiral groove 471 on the outer wall of the rotating post 47 is slidably engaged with the guide post 411 of the outer fixing tube 41. When the product is pressed and the rotating post 47 moves downward, the spiral groove 471 forces the rotating post 47 to rotate under the restriction of the guide post 411. The linear downward pressing action can be converted into rotational power without additional driving components, directly driving the lower double-headed connecting shaft 34 to rotate, thereby driving the fixing mechanism 3 to complete the clamping. The side end of the guide post 411 is fixedly connected to the top of the inner wall of the outer fixing tube 41.

[0029] Please see Figures 1-6 This utility model provides a technical solution: a trimming device for MIM products, including a grinding mechanism 1 with a U-shaped plate 14 fixedly installed on the side away from the motor 12. The U-shaped plate 14 is fixedly connected to the grinding mechanism 1 and can provide rotational support for the grinding rod 13 at both ends, ensuring that the grinding rod 13 rotates without shaking or offset, and avoiding uneven trimming marks caused by unstable installation of the grinding parts. The grinding rod 13 is rotatably installed on the inner wall of the U-shaped plate 14. Diamond grinding particles are evenly distributed on the outer wall of the grinding rod 13. The diamond grinding particles have high hardness and strong wear resistance. Compared with ordinary grinding materials, they can quickly cut the burrs and flash of MIM products, greatly shortening the trimming time of a single straight edge. The length of the grinding rod 13 is not less than the side length of the back cover of the mobile phone.

[0030] Please see Figures 1-6 This utility model provides a technical solution: a trimming device for MIM products, including a connecting plate 64 whose height exceeds the top of the connecting rod 66 by 5mm, and this height is designed to provide sufficient safety clearance for the swinging movement of the connecting rod 66; the bottom of the base plate 2 does not contact the connecting rod 66, effectively preventing the moving parts such as the connecting rod 66 and the slider 67 from colliding or rubbing against the base plate 2 or the connecting plate 64 when the adjustment mechanism 6 is working, thus avoiding mechanical jamming or wear of parts.

[0031] Working principle: First, place the back cover of the phone to be trimmed on top of the fixing mechanism 3, so that the bottom of the product abuts against the top of the rotating column 47. Manually press the product to move the rotating column 47 downward. The spiral groove 471 on the outer wall of the rotating column 47 rotates under the restriction of the guide column 411, which in turn drives the double-headed connecting shaft 34 to rotate. Through the support rod 323, the fixing plate 1 32 and the fixing plate 2 33 slide along the limiting rod 31 to both sides. The edge support block 322 achieves centering and clamping from the inner wall of the product. At the same time, the locking column 46 moves down with the rotating column 47 to compress the spring 44. The locking rod 43 slides into the groove of the locking block 462 along the guide groove 461 to complete the mechanical locking and prevent the trimming from loosening. Then, start the motor 12 to drive the screw 11 to rotate. Through the thread transmission between the screw 11 and the internal thread block 51, the sliding plate 5 slides linearly along the top of the grinding mechanism 1, so that the product... The straight edge contacts the grinding rod 13 on the inner wall of the U-shaped plate 14. The diamond grinding particles on the outer wall of the grinding rod 13 are used to trim the straight edge, ensuring the parallelism of the straight edge. After the first straight edge is trimmed, the motor 65 drives the connecting rod 66 to swing, causing the slider 67 to slide in the groove 62 of the intermittent plate 61. This pushes the intermittent plate 61 to rotate 90 degrees intermittently around the bottom column 63. The connecting plate 64 and the bottom plate 2 drive the product to rotate synchronously, so that the next untrimmed straight edge is aligned with the grinding rod 13, until all four straight edges are completed. After the trimming is completed, press the product again to make the locking pin 46 continue to move down. The locking rod 43 disengages from the locking block 462, and the spring 44 resets and pushes the locking pin 46 to move up, causing the rotating column 47 to rotate in the opposite direction. This resets the fixing plate 1 32 and the fixing plate 2 33, releasing the product, and the trimmed mobile phone back cover can be taken out.

[0032] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the content of this utility model specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A trimming device for MIM products, comprising a polishing mechanism (1), characterized in that: A motor (12) is fixedly installed on the outer wall of the grinding mechanism (1). A screw (11) is fixedly installed on the drive end of the motor (12). An internal thread block (51) is threadedly connected to the outer wall of the screw (11). A sliding plate (5) is fixedly installed on the top of the internal thread block (51). The bottom of the sliding plate (5) is slidably connected to the top of the grinding mechanism (1). An adjustment mechanism (6) is fixedly installed on the top of the sliding plate (5). A base plate (2) is fixedly installed on the top of the adjustment mechanism (6). A fixing mechanism (3) is fixedly installed on the top of the base plate (2). A locking mechanism (4) is fixed at the center of the inner wall of the fixing mechanism (3). The adjustment mechanism (6) includes a base column (63), which is fixedly connected to the top of the slide plate (5). An intermittent disk (61) is rotatably mounted on the outer wall of the top of the base column (63). Four sliding grooves (62) are opened on the inner wall of the intermittent disk (61), and the angle between the four sliding grooves (62) is 90 degrees. A slider (67) slides against the inner wall of one of the sliding grooves (62). A connecting rod (66) is rotatably mounted on the top of the slider (67). The side end of the connecting rod (66) is fixedly mounted on the drive end of the motor (65). The bottom of the motor (65) is fixedly connected to the top of the slide plate (5). A connecting disk (64) is fixed at the center of the top of the intermittent disk (61). The top of the connecting disk (64) is fixedly connected to the base plate (2).

2. The MIM product trimming device as described in claim 1, characterized in that: The fixing mechanism (3) includes a limiting rod (31), which is fixedly connected to the top of the base plate (2). Fixing plate one (32) and fixing plate two (33) are slidably installed at both ends of the outer wall of the limiting rod (31). The internal structures of fixing plate one (32) and fixing plate two (33) are the same. The fixing plate (32) includes a limiting block (321), which is slidably connected to the outer wall of the limiting rod (31). Edge support blocks (322) are fixedly installed on both sides of the limiting block (321). A support rod (323) is rotatably installed at the top center of the limiting block (321). A double-headed connecting shaft (34) is rotatably installed on the side end of the support rod (323). The center of the double-headed connecting shaft (34) is fixedly connected to the locking mechanism (4).

3. The MIM product trimming device as described in claim 2, characterized in that: The locking mechanism (4) includes an outer fixing tube (41), which is fixedly connected to the center of the top of the limiting rod (31). A bottom block (42) is fixedly installed on the bottom of the inner wall of the outer fixing tube (41). A locking rod (43) is rotatably installed on the outer wall of the bottom block (42). The top of the locking rod (43) is slidably connected to the locking post (46). A sliding post (45) is fixedly installed on the top of the bottom block (42). The outer wall of the sliding post (45) is slidably connected to the inner wall of the locking post (46). A spring (44) is provided on the outer wall of the sliding post (45). The top and bottom of the spring (44) are fixedly connected to the opposite surfaces of the bottom block (42) and the locking post (46), respectively. A guide groove (461) is opened on the outer wall of the locking post (46). A locking block (462) is fixed on the inner wall of the guide groove (461).

4. The MIM product trimming device as described in claim 3, characterized in that: The top of the locking post (46) is rotatably mounted with a rotating post (47). The outer wall of the rotating post (47) has a spiral groove (471). The inner wall of the spiral groove (471) is slidably mounted with a guide post (411). The side end of the guide post (411) is fixedly connected to the top of the inner wall of the outer fixing tube (41).

5. The MIM product trimming device as described in claim 4, characterized in that: A U-shaped plate (14) is fixedly installed on the side of the grinding mechanism (1) away from the motor (12), and a grinding rod (13) is rotatably installed on the inner wall of the U-shaped plate (14).

6. The MIM product trimming device as described in claim 5, characterized in that: The height of the connecting plate (64) exceeds the top of the connecting rod (66) by 5mm, and the bottom of the base plate (2) does not contact the connecting rod (66).

7. The MIM product trimming device as described in claim 6, characterized in that: The inner wall of the edge support block (322) is an arc-shaped structure adapted to the inner wall of the back cover of the mobile phone, and the end of the edge support block (322) is designed with rounded corners.

8. The MIM product trimming device as described in claim 7, characterized in that: The outer wall of the polishing rod (13) is uniformly distributed with diamond polishing particles, and the length of the polishing rod (13) is not less than the side length of the back cover of the mobile phone.

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