Aluminum alloy integrated die-casting deburring device

Abstract

The invention discloses an aluminum alloy integrated die-casting deburring device, and relates to the field of aluminum alloy machining, the aluminum alloy integrated die-casting deburring device comprises a supporting mechanism, a rotating mechanism rotationally mounted on the inner side of the supporting mechanism and a polishing mechanism slidably arranged on the inner side of the rotating mechanism, the supporting mechanism comprises a base and a side frame, and the side frame is fixedly mounted at the edge of the base; a bent plate is fixedly mounted at the top of the side frame, and an electric cylinder is fixedly mounted on the lower surface of the bent plate. The vertical cylinder, the annular plate and the movable frame are driven to rotate through a motor belt transmission assembly of the rotating mechanism, surrounding type all-directional grinding of workpieces by a grinding belt can be achieved, the grinding position can be flexibly adjusted according to the sizes of the workpieces, and the problems that an existing device is insufficient in grinding flexibility and difficult to adapt to the workpieces of different specifications are solved; and the deburring efficiency and precision are greatly improved.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of aluminum alloy processing, in particular to an aluminum alloy integrated die-casting burr removing device. BACKGROUND

[0002] In the production process of aluminum alloy integrated die-casting, burrs are easily generated on the surface of the die-casting due to factors such as mold joint gap and metal liquid flow filling. These burrs not only affect the appearance quality of the product, but also may cause assembly precision to decrease, subsequent processing reference deviation, and even safety hazards in the use process. Therefore, burr removing operation is a key post-processing link of aluminum alloy die-casting production.

[0003] For example, a burr removing device for aluminum alloy die-castings disclosed in CN116572146A comprises a fixed base, an abrasive pool and a grinding wheel. The abrasive pool is fixedly installed on the inner side of the upper end of the fixed base, the grinding wheel is movably installed on the upper side of the fixed base near the abrasive pool, a material recycling box is fixedly installed on the inner side of the fixed base below the abrasive pool, a lifting cover plate is movably installed above the abrasive pool, an elastic nozzle is connected to the lower end of the lifting cover plate, a telescopic pipe is connected to the upper end of the lifting cover plate, and a moving slide is arranged on one end of the grinding wheel.

[0004] However, most of the existing aluminum alloy die-casting burr removing devices still rely on manual operation. When the burrs are removed by manually holding the grinding tool, the labor intensity is high, the operation efficiency is low, the grinding precision cannot be guaranteed, and problems such as local over-grinding or burr residue are likely to occur. Although some automatic burr removing devices can realize mechanical grinding, they generally have defects such as poor workpiece fixing stability and insufficient flexibility of the grinding mechanism, and cannot adapt to aluminum alloy die-castings of different specifications. SUMMARY

[0005] The application aims to provide an aluminum alloy integrated die-casting burr removing device to solve the problems of high manual dependence, low operation efficiency, poor grinding precision and poor adaptability to aluminum alloy die-castings of different specifications of the burr removing device in the prior art.

[0006] To achieve the above-mentioned purpose, the application provides the following technical scheme: an aluminum alloy integrated die-casting burr removing device, comprising a supporting mechanism, a rotating mechanism rotatably installed on the inner side of the supporting mechanism and a grinding mechanism slidably arranged on the inner side of the rotating mechanism. The supporting mechanism comprises a base and a side frame. The side frame is fixedly installed at the edge of the base. A bent plate is fixedly installed on the top of the side frame. An electric cylinder is fixedly installed on the lower surface of the bent plate. A pressing block is fixedly installed on one end of the piston rod of the electric cylinder. The axis of the pressing block coincides with the axis of the base. The rotating mechanism comprises a movable frame, one end of the movable frame is fixedly provided with an annular plate, the annular plate is sleeved on the top of the base, the other end of the annular plate is fixedly provided with a vertical cylinder, the vertical cylinder is sleeved on the outer wall of the pressing block, the upper surface of the side frame is fixedly provided with a motor belt transmission assembly, the transmission belt of the motor belt transmission assembly is connected with the vertical cylinder, and in use, the vertical cylinder is driven by the motor belt transmission assembly, so that the movable frame rotates with the connecting point of the annular plate and the base as the center, and the polishing mechanism moves around the aluminum alloy.

[0007] Preferably, the top of the base is fixedly provided with a protrusion, the protrusion is located directly below the pressing block, and an annular groove is formed between the protrusion and the base.

[0008] Preferably, a through hole is formed at the joint of the side frame and the bent plate, the pressing block penetrates through the through hole, the vertical cylinder is located between the pressing block and the side frame, and the axis of the vertical cylinder coincides with the axis of the through hole.

[0009] Preferably, anti-disengagement protrusions are fixedly arranged at the upper and lower parts of the inner side wall of the movable frame, the end of one of the anti-disengagement protrusions is fixedly provided with a limiting plate, a motor lead screw transmission assembly is fixedly arranged at the corner of the bottom of the movable frame, and one end of the lead screw of the motor lead screw transmission assembly is rotationally connected with the limiting plate.

[0010] Preferably, a protruding part is arranged at the corner of the bottom of the side frame, the shape of the protruding part is matched with the motor lead screw transmission assembly, the protruding part is used for preventing the side frame from colliding with the motor lead screw transmission assembly when the movable frame rotates, and a gap is reserved between the side frame and the movable frame.

[0011] Preferably, the polishing mechanism comprises a first sliding block and a second sliding block, the second sliding block is slidingly connected on the anti-disengagement protrusion above the inner side wall of the movable frame, the first sliding block is slidingly arranged on the anti-disengagement protrusion below the inner side wall of the movable frame, and the first sliding block and the second sliding block are symmetrically arranged.

[0012] Preferably, the bottom of the first sliding block is threadedly connected with the lead screw of the motor lead screw transmission assembly, one side of the first sliding block is fixedly provided with a servo motor, the output end of the servo motor is fixedly connected with a rotating rod inside the first sliding block, and the rotating rod inside the first sliding block is connected with a rotating rod inside the second sliding block.

[0013] Compared with the prior art, the present application has the following advantages: 1. In this invention, the motor belt drive assembly of the rotating mechanism drives the vertical cylinder, the annular plate and the movable frame to rotate, which can realize the all-round grinding of the workpiece by the grinding belt, and can flexibly adjust the grinding position according to the size of the workpiece. This solves the problem of insufficient grinding flexibility and difficulty in adapting to different specifications of workpieces in the existing device, and greatly improves the deburring efficiency and accuracy.

[0014] 2. In this invention, the base and protrusion of the support mechanism cooperate with the electric cylinder and pressing block to accurately position and firmly fix aluminum alloy die-casting parts of different specifications. At the same time, the through hole guides the movement of the pressing block, preventing the workpiece from shifting during fixation. This effectively solves the problem of poor workpiece fixation stability in existing devices and provides a foundation for subsequent precise deburring.

[0015] 3. In this invention, the protrusion at the bottom of the side frame is adapted to the motor screw transmission assembly, which can prevent the mechanism from colliding when the movable frame rotates. At the same time, the gap between the side frame and the movable frame ensures smooth rotation. The anti-detachment protrusion and the limiting plate can prevent the grinding mechanism from falling off or overtraveling when sliding. The motor screw transmission assembly drives the first slider and the second slider to slide along the anti-detachment protrusion, which can flexibly adjust the grinding position according to the workpiece size. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural schematic diagram of an integrated die-casting deburring device for aluminum alloy according to the present invention; Figure 2 This is a schematic diagram of the planar structure of an integrated die-casting deburring device for aluminum alloy according to the present invention; Figure 3 This is a three-dimensional structural diagram showing the disassembled structure of an integrated die-casting deburring device for aluminum alloy according to the present invention. Figure 4 This is a three-dimensional structural diagram of the support mechanism in an integrated die-casting deburring device for aluminum alloy according to the present invention. Figure 5 This is a schematic diagram of the rotating mechanism in an integrated die-casting deburring device for aluminum alloys according to the present invention. Figure 6 This is a schematic diagram of the planar structure inside the vertical cylinder of the integrated aluminum alloy die-casting deburring device of the present invention.

[0017] In the diagram: 1. Support mechanism; 2. Rotation mechanism; 3. Grinding mechanism; 11. Base; 12. Side frame; 13. Bending plate; 14. Electric cylinder; 15. Pressing block; 16. Protrusion; 17. Protrusion; 18. Annular groove; 19. Through hole; 21. Movable frame; 22. Annular plate; 23. Vertical cylinder; 24. Motor lead screw transmission assembly; 25. Motor belt transmission assembly; 26. Anti-detachment protrusion; 27. Limiting plate; 31. First slider; 32. Second slider; 33. Grinding belt; 34. Servo motor. DETAILED DESCRIPTION

[0018] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all the other embodiments obtained by a person of ordinary skill in the art without creative work fall within the protection scope of the present application.

[0019] Embodiment one: refer to Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6 : an aluminum alloy integrated die-casting deburring device, comprising a supporting mechanism 1, a rotating mechanism 2 rotatably installed on the inner side thereof, and a polishing mechanism 3 slidably arranged on the inner side of the rotating mechanism 2, the supporting mechanism 1 comprises a base 11 and a side frame 12, the side frame 12 is fixedly installed at the edge of the base 11, the top of the side frame 12 is fixedly installed with a bent plate 13, the lower surface of the bent plate 13 is fixedly installed with an electric cylinder 14, one end of the piston rod of the electric cylinder 14 is fixedly installed with a pressing block 15, the axis of the pressing block 15 coincides with the axis of the base 11, the rotating mechanism 2 comprises a movable frame 21, one end of the movable frame 21 is fixedly installed with an annular plate 22, the annular plate 22 is sleeved on the top of the base 11, the other end of the annular plate 22 is fixedly installed with a vertical cylinder 23, the vertical cylinder 23 is sleeved on the outer wall of the pressing block 15, the upper surface of the side frame 12 is fixedly installed with a motor belt transmission assembly 25, the transmission belt of the motor belt transmission assembly 25 is connected with the vertical cylinder 23, in use, the vertical cylinder 23 is driven by the motor belt transmission assembly 25, so that the movable frame 21 rotates with the connecting point of the annular plate 22 and the base 11 as the center, and the polishing mechanism 3 moves around the aluminum alloy.

[0020] In this embodiment, when the deburring operation of aluminum alloy die castings is carried out, first, the aluminum alloy die castings to be processed are placed on the base 11 of the supporting mechanism 1. Since the axis of the pressing block 15 coincides with the axis of the base 11, the electric cylinder 14 fixedly installed on the lower surface of the top bending plate 13 of the side frame 12 in the supporting mechanism 1 is started, and the piston rod of the electric cylinder 14 will drive the pressing block 15 to move downward until the pressing block 15 is in close contact with the aluminum alloy die castings on the base 11, thereby firmly fixing the aluminum alloy die castings on the base 11 and preventing displacement of the aluminum alloy die castings during the deburring process. Then, the motor belt drive assembly 25 fixedly installed on the upper surface of the side frame 12 in the rotating mechanism 2 is started, and the transmission belt of the motor belt drive assembly 25 will drive the vertical cylinder 23 connected thereto to rotate. Since the vertical cylinder 23 is fixedly connected with the movable frame 21, the movable frame 21 is fixedly connected with the annular plate 22, and the annular plate 22 is sleeved on the top of the base 11, when the vertical cylinder 23 rotates, it will drive the movable frame 21 and the annular plate 22 to rotate with the connecting point of the annular plate 22 and the base 11 as the center, and the polishing mechanism 3 is slidably arranged on the inner side of the movable frame 21. With the rotation of the movable frame 21, the polishing mechanism 3 will also move around the aluminum alloy die castings fixed on the base 11. In the process of moving, the polishing mechanism 3 will contact different parts of the surface of the aluminum alloy die castings, thereby polishing and removing the burrs on the surface of the aluminum alloy die castings, realizing the deburring operation of the aluminum alloy integrated die castings. The base 11 in the supporting mechanism 1 provides a stable placement platform for the aluminum alloy die castings, the side frame 12 not only plays a supporting role for the bending plate 13, but also provides an installation position for the motor belt drive assembly 25, the bending plate 13 ensures the stability and accuracy of the installation of the electric cylinder 14, and the electric cylinder 14 drives the pressing block 15 to reliably fix the aluminum alloy die castings, avoiding the displacement of the workpiece during the deburring process, which affects the deburring effect and precision. The movable frame 21 in the rotating mechanism 2 provides a basis for the installation and movement of the polishing mechanism 3, the annular plate 22 realizes the connection between the movable frame 21 and the base 11, and ensures the coaxiality of the rotation of the movable frame 21, the vertical cylinder 23 can stably transmit power under the drive of the motor belt drive assembly 25, so that the movable frame 21 rotates, the polishing mechanism 3 is slidably arranged on the inner side of the movable frame 21, which not only facilitates the adjustment of the polishing position according to the size and shape of the aluminum alloy die castings, but also ensures that the burrs on each part of the workpiece can be effectively polished, and with the rotation of the movable frame 21, the polishing mechanism 3 can realize circular polishing, which can uniformly remove the burrs on the surface of the aluminum alloy die castings, improve the consistency and quality of deburring, and the overall device realizes the automation of the deburring operation of the aluminum alloy integrated die castings through the cooperation of each part, reduces the manual intervention, improves the deburring efficiency, and ensures the deburring precision and effect, which is conducive to improving the overall quality of the aluminum alloy die castings.

[0021] Embodiment two: according to Figure 1 ,Figure 2 、 Figure 3 and Figure 4 As shown in

[0022] In this embodiment, the protrusion 16 is directly below the pressing block 15, which is used to determine the position of the aluminum alloy. The electric cylinder 14 under the bent plate 13 at the top of the side frame 12 is started, and the pressing block 15 penetrates the through hole 19 at the intersection of the side frame 12 and the bent plate 13 and moves downward until it is in close contact with the workpiece on the protrusion 16, thereby fixing the workpiece. The annular plate 22 is sleeved on the annular groove 18 to determine the rotation center of the movable frame 21. The protrusion 16 assists in positioning the workpiece, the annular groove 18 limits the displacement of the annular plate 22 to ensure coaxiality during rotation, and the through hole 19 guides the movement of the pressing block 15 to avoid deviation. The position and axis of the vertical cylinder 23 are set to ensure stable power transmission and reduce shaking. The cooperation of various components further improves the stability of workpiece fixing and polishing precision, ensures deburring effect, and makes the device structure more reasonable and the operation more stable and reliable.

[0023] Embodiment Three: According to Figure 3 、 Figure 5 and Figure 6 As shown in

[0024] In this embodiment, the motor screw rod transmission assembly 24 at the bottom corner of the movable frame 21 is used to adjust the position of the polishing mechanism 3. One end of the screw rod of the motor screw rod transmission assembly 24 is rotationally connected with the limiting plate 27 at the end of the anti-falling convex strip 26, which drives the polishing mechanism 3 to slide stably along the anti-falling convex strip 26 inside the movable frame 21 to adjust the polishing position. The anti-falling convex strip 26 prevents the polishing mechanism 3 from falling off. The motor belt transmission assembly 25 on the side frame 12 is started, which drives the vertical cylinder 23 located between the pressing block 15 and the side frame 12 and having an axis coinciding with the through hole 19 to rotate. The vertical cylinder 23 drives the annular plate 22 in the annular groove 18 between the base 11 and the convex block 16 and the movable frame 21 to rotate. The polishing mechanism 3 polishes around the workpiece. The protrusion 17 at the bottom corner of the side frame 12 is adapted to the motor screw rod transmission assembly 24 to prevent collision between the two. The gap between the side frame 12 and the movable frame 21 ensures the flexible rotation of the movable frame 21. The anti-falling convex strip 26 prevents the polishing mechanism 3 from falling off. The limiting plate 27 limits the sliding range of the polishing mechanism 3. The motor screw rod transmission assembly 24 realizes precise position adjustment of the polishing mechanism 3. The protrusion 17 prevents the side frame 12 from colliding with the motor screw rod transmission assembly 24. The gap ensures the rotation of the movable frame 21 without obstruction. The cooperation of various components further improves the polishing accuracy and the safety of the device operation, ensuring stable and efficient deburring operation.

[0025] In embodiment four, according to Figure 2 、 Figure 3 and Figure 5 , the polishing mechanism 3 includes a first sliding block 31 and a second sliding block 32. The second sliding block 32 is slidingly connected to the anti-falling convex strip 26 above the inner side wall of the movable frame 21. The first sliding block 31 is slidingly installed on the anti-falling convex strip 26 below the inner side wall of the movable frame 21. The first sliding block 31 and the second sliding block 32 are symmetrically arranged. The bottom of the first sliding block 31 is threadedly connected with the screw rod of the motor screw rod transmission assembly 24. A servo motor 34 is fixedly installed on one side of the first sliding block 31. The output end of the servo motor 34 is fixedly connected with a rotating rod inside the first sliding block 31. A polishing belt 33 is connected between the rotating rod inside the first sliding block 31 and the rotating rod inside the second sliding block 32.

[0026] In this embodiment, the screw rod of the motor screw transmission assembly 24 is threadedly connected with the bottom of the first sliding block 31. When the motor screw transmission assembly 24 operates, it drives the first sliding block 31 to slide along the anti-falling convex strip 26 below the inner side wall of the movable frame 21. The second sliding block 32 symmetrically arranged is pulled by the polishing belt 33, so as to follow the first sliding block 31 to slide synchronously along the upper anti-falling convex strip 26. At the same time, the servo motor 34 on one side of the first sliding block 31 is started, and the output end drives the inner side rotating rod of the first sliding block 31 to rotate. The rotating rod drives the polishing belt 33 between the first sliding block 31 and the second sliding block 32 to operate. Then, the motor belt transmission assembly 25 on the side frame 12 is started, which drives the vertical cylinder 23 to rotate, and in turn drives the annular plate 22 and the movable frame 21 to rotate. The polishing belt 33 surrounds the workpiece along with the movable frame 21, and the full-range polishing is realized by the cooperation of the sliding adjustment. The protruding part 17 at the bottom of the side frame 12 prevents the collision with the motor screw transmission assembly 24, and the gap between the side frame 12 and the movable frame 21 ensures the smooth rotation. The symmetric sliding of the first sliding block 31 and the second sliding block 32 ensures the stability of the polishing belt 33. The servo motor 34 drives the polishing belt 33 to operate efficiently. The motor screw transmission assembly 24 realizes the accurate adjustment of the polishing position. The anti-falling convex strip 26 prevents the sliding block from falling off. The cooperation of all components improves the polishing efficiency and precision, ensures the stability and reliability of the deburring operation, and enhances the safety and smoothness of the overall operation of the device.

[0027] The working principle and method of using the device: first, place the aluminum alloy die casting to be treated on the protrusion 16 on the top of the base 11 of the support mechanism 1; then start the electric cylinder 14 fixedly installed on the lower surface of the bending plate 13 on the top of the side frame 12 in the support mechanism 1, so that the piston rod of the electric cylinder 14 drives the pressing block 15 to move downward through the through hole 19 at the joint of the side frame 12 and the bending plate 13, until the pressing block 15 is in close contact with the aluminum alloy die casting on the protrusion 16; then start the motor lead screw transmission assembly 24 at the bottom corner of the movable frame 21 in the rotating mechanism 2, one end of the lead screw of the motor lead screw transmission assembly 24 is rotationally connected with the limiting plate 27 at the end of the anti-dropping convex strip 26, and the lead screw is threadedly connected with the bottom of the first sliding block 31 in the polishing mechanism 3, the operation of the motor lead screw transmission assembly 24 drives the first sliding block 31 to slide along the anti-dropping convex strip 26 below the inner side wall of the movable frame 21, because the first sliding block 31 and the second sliding block 32 are symmetrically arranged and the polishing belt 33 is connected between the inner side rotary rods of the two, the second sliding block 32 slides synchronously along the anti-dropping convex strip 26 above the inner side wall of the movable frame 21 with the first sliding block 31, and the servo motor 34 fixedly installed on one side of the first sliding block 31 is started at the same time, the rotary rod in the inner side of the first sliding block 31 is driven to rotate by the output end of the servo motor 34, thereby driving the polishing belt 33 between the first sliding block 31 and the second sliding block 32 to operate; then start the motor belt transmission assembly 25 fixedly installed on the upper surface of the side frame 12 in the support mechanism 1, the transmission belt of the motor belt transmission assembly 25 drives the vertical cylinder 23 connected therewith to rotate, the vertical cylinder 23 drives the movable frame 21 to rotate with the connecting point of the annular plate 22 and the base 11 as the center, the polishing mechanism 3 moves around the aluminum alloy die casting fixedly installed on the base 11 with the movable frame 21, during which the protruding part 17 at the bottom corner of the side frame 12 prevents the side frame 12 from colliding with the motor lead screw transmission assembly 24 when the movable frame 21 rotates, and the gap between the side frame 12 and the movable frame 21 ensures smooth rotation of the movable frame 21.

[0028] Although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art can modify the technical solutions described in the foregoing embodiments or make equivalent replacements for part of the technical features, and any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A deburring device for integrated die casting of aluminum alloy, characterized in that: The system includes a support mechanism (1), a rotating mechanism (2) rotatably mounted inside the support mechanism (1), and a grinding mechanism (3) slidably mounted inside the rotating mechanism (2). The support mechanism (1) includes a base (11) and a side frame (12). The side frame (12) is fixedly mounted on the edge of the base (11). A bending plate (13) is fixedly mounted on the top of the side frame (12). An electric cylinder (14) is fixedly mounted on the lower surface of the bending plate (13). A pressing block (15) is fixedly mounted on one end of the piston rod of the electric cylinder (14). The axis of the pressing block (15) coincides with the axis of the base (11). The rotating mechanism (2) includes a movable frame (21), one end of which is fixedly mounted with an annular plate (22), which is sleeved on the top of the base (11). The other end of the annular plate (22) is fixedly mounted with a vertical cylinder (23), which is sleeved on the outer wall of the pressing block (15). The upper surface of the side frame (12) is fixedly mounted with a motor belt drive assembly (25), and the drive belt of the motor belt drive assembly (25) is connected to the vertical cylinder (23). When in use, the motor belt drive assembly (25) drives the vertical cylinder (23), so that the movable frame (21) rotates around the connection point between the annular plate (22) and the base (11), allowing the grinding mechanism (3) to move around the aluminum alloy.

2. The aluminum alloy integrated die-casting deburring device according to claim 1, characterized in that: A protrusion (16) is fixedly installed on the top of the base (11). The protrusion (16) is located directly below the pressing block (15). An annular groove (18) is provided between the protrusion (16) and the base (11). The annular plate (22) is located in the annular groove (18).

3. The aluminum alloy integrated die-casting deburring device according to claim 1, characterized in that: A through hole (19) is provided at the junction of the side frame (12) and the bending plate (13). The pressing block (15) passes through the through hole (19). The vertical cylinder (23) is located between the pressing block (15) and the side frame (12). The axis of the vertical cylinder (23) coincides with the axis of the through hole (19).

4. The aluminum alloy integrated die-casting deburring device according to claim 1, characterized in that: Anti-detachment protrusions (26) are fixedly installed at both the top and bottom of the inner sidewall of the movable frame (21). A limiting plate (27) is fixedly installed at the end of one of the anti-detachment protrusions (26). A motor screw transmission assembly (24) is fixedly installed at the bottom corner of the movable frame (21). One end of the screw of the motor screw transmission assembly (24) is rotatably connected to the limiting plate (27).

5. The aluminum alloy integrated die-casting deburring device according to claim 1, characterized in that: A protrusion (17) is provided at the corner of the bottom of the side frame (12). The shape of the protrusion (17) is adapted to the motor screw drive assembly (24) to prevent the side frame (12) from colliding with the motor screw drive assembly (24) when the movable frame (21) rotates. A gap is left between the side frame (12) and the movable frame (21).

6. The aluminum alloy integrated die-casting deburring device according to claim 1, characterized in that: The grinding mechanism (3) includes a first slider (31) and a second slider (32). The second slider (32) is slidably connected to the anti-detachment protrusion (26) on the upper side wall of the movable frame (21). The first slider (31) is slidably installed on the anti-detachment protrusion (26) on the lower side wall of the movable frame (21). The first slider (31) and the second slider (32) are symmetrically arranged.

7. The aluminum alloy integrated die-casting deburring device according to claim 6, characterized in that: The bottom of the first slider (31) is connected to the screw thread of the motor screw transmission assembly (24). A servo motor (34) is fixedly installed on one side of the first slider (31). The output end of the servo motor (34) is fixedly connected to the rotating rod inside the first slider (31). A grinding belt (33) is connected between the rotating rod inside the first slider (31) and the rotating rod inside the second slider (32).

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