Automobile part polishing device

Abstract

The utility model discloses an automobile part polishing device, and relates to the technical field of automobile part processing devices, the automobile part polishing device comprises a polishing box, a polishing mechanism is connected in the polishing box, the polishing mechanism is used for polishing the surface of a part, the bottom in the polishing box is fixedly connected with a placing table, the placing table is connected with a driving mechanism, and the driving mechanism is used for driving the surface of the part to be polished. The driving mechanism comprises a driving air pump, a fixed air disc, a communicating pipe and an electromagnetic valve, a mounting seat is fixedly connected to the outer side of the polishing box, the driving air pump is mounted on the mounting seat, and the fixed air disc is fixedly connected to the placement table. According to the fixing device, the parts in different shapes can be effectively and evenly extruded and fixed, the multiple fixing assemblies form even extrusion acting force on the peripheral sides of the parts through pneumatic transmission, the fixing adaptability to the parts in different shapes is improved, and the fixing efficiency of the automobile parts is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of automobile parts processing devices, in particular to an automobile parts grinding device. Background Art

[0002] Automobile parts are the basis of the automobile production industry, with a wide variety and extensive uses. During the processing of some automobile parts, it is necessary to grind the surface of the parts to improve the surface characteristics of the parts and facilitate the use of the parts. When the existing automobile parts grinding equipment grinds the parts, two clamping plates are usually used to clamp and fix the two sides of the parts, which easily causes the parts to shift during processing, affecting the grinding operation of the parts.

[0003] After retrieval, the Chinese utility model patent with the application number CN202210252668.X discloses a parts grinding device for automobile processing, including a workbench, and a isolation box is fixedly installed on the top of the workbench... It controls the clamping plates to form clamping on the periphery of the parts by using the first electric push rod and the second electric push rod in all directions, and then grinds the parts. In this way, the control and adjustment of the four groups of the first electric push rod and the second electric push rod are relatively complex, which is not conducive to quickly completing the clamping and fixing of the parts. At the same time, for special-shaped parts, the clamping contact effect is poor, and the extrusion force on the parts is prone to imbalance, which is not conducive to the stability of the parts during the grinding process; and the second electric push rod cannot be continuously in a loaded state after being fixed, and the second electric push rod is prone to generate fluctuations, affecting the fixing stability of the parts.

[0004] In the prior art, while setting a fixing mechanism to clamp and fix the parts, it is necessary to additionally set a chip removal mechanism to handle the waste chips generated during the grinding process, increasing the setting of the driving source and increasing the cost. Summary of the Utility Model

[0005] An automobile parts grinding device proposed by the utility model aims to solve the problem that the control and adjustment of the traditional method of using four groups of the first electric push rod and the second electric push rod to clamp and fix the periphery of the parts are relatively complex and not conducive to quickly completing the clamping and fixing of the parts.

[0006] In order to achieve the above purpose, the utility model adopts the following technical scheme:

[0007] An automobile spare part grinding device, comprising a grinding box, wherein a grinding mechanism is connected inside the grinding box, and the grinding mechanism is used for grinding the surface of the spare parts. A placing table is fixedly connected to the bottom inside the grinding box, and a driving mechanism is connected to the placing table. The driving mechanism includes a driving air pump, a fixed air disc, a communicating pipe and a solenoid valve. An installation seat is fixedly connected to the outside of the grinding box, and the driving air pump is installed on the installation seat. The fixed air disc is fixedly connected to the placing table, and the spare parts to be processed are placed inside the fixed air disc. An air storage cavity is formed inside the fixed air disc. The output end of the driving air pump is communicated with a hose, and one end of the hose away from the driving air pump is communicated with the air storage cavity. A plurality of communicating pipes are communicated with the inner side of the air storage cavity, and solenoid valves are installed in the middle of the plurality of communicating pipes. One end of the communicating pipe away from the fixed air disc is connected with a fixing component. The fixing component includes a sealing rod, a fixing block, a sliding block and a compression spring. The sealing rod is hermetically and slidably connected inside the communicating pipe. One end of the sealing rod away from the fixed air disc is fixedly connected with a fixing block. A sliding groove is formed inside the fixing block. A sliding block is hermetically and slidably connected to one end of the sliding groove away from the communicating pipe. A compression spring is fixedly connected between the sliding block and the inner end of the sliding groove. A pressing switch is installed at the inner end of the sliding groove, and the pressing switch is electrically connected to the solenoid valve. A locking component is connected to the bottom of the fixing block. A plurality of limiting holes are formed in the placing table, and the output end of the locking component is clamped in the limiting holes.

[0008] Preferably, the fixed air disc is in a rectangular frame shape, and the plurality of communicating pipes are evenly distributed on the inner peripheral side of the rectangular frame shape, and the axial direction of the communicating pipe is perpendicular to the inner side of the rectangular frame shape.

[0009] Preferably, the solenoid valve adopts a three-way three-position valve. The inlet end and one outlet end of the solenoid valve are communicated with the communicating pipe, and the other outlet end is communicated with a spray pipe. The output ends of the plurality of spray pipes point to the center of the placing table, and the spray pipes clean the waste chips generated during grinding when working.

[0010] Preferably, a plurality of limiting grooves are formed in the placing table, and the bottoms of the plurality of fixing blocks are slidably connected to the plurality of limiting grooves one by one, forming a limiting effect on the fixing blocks in the radial direction of the communicating pipe, and further improving the stability of the fixing blocks during operation.

[0011] Preferably, a communicating groove is formed inside the sealing rod. One end of the communicating groove is communicated with the communicating pipe, and the other end is communicated with the sliding groove. An annular groove is formed at one end of the sliding block close to the fixing block. One end of the compression spring away from the fixing block is fixedly connected to the annular groove. The minimum axial length of the compression spring is less than the depth of the annular groove, and the sliding block is hermetically matched with the communicating groove.

[0012] Preferably, the locking assembly includes a wedge block and a restoring spring. A locking groove is formed at the bottom of the fixed block, and the top of the locking groove communicates with the sliding groove. The wedge block is slidably connected in the locking groove, and a restoring spring is fixedly connected between the wedge block and the fixed block. A square groove is formed at the bottom of the sliding block, and the top end of the wedge block extends into the square groove, wherein the wedge surface of the wedge block faces the side of the square groove away from the communicating pipe, and the bottom end of the wedge block is clamped in the limiting hole. The wedge block is clamped in the limiting hole, which is convenient for limiting the fixed block and improving the stability of the fixed block during operation.

[0013] Preferably, a plurality of the limiting holes are distributed in a rectangular array on the placement table, and the axial directions of the plurality of communicating pipes coincide with the rectangular array of the plurality of limiting holes. The limiting holes form a limiting effect on the wedge block.

[0014] Preferably, a collection bin is formed in the placement table. The top of the collection bin communicates with the plurality of limiting holes, and an exhaust pipe is communicated with one side of the collection bin. A filter screen is fixedly connected in the exhaust pipe. The filter screen prevents waste chips from being directly discharged through the exhaust pipe, which is convenient for collecting waste chips.

[0015] Compared with the prior art, the present utility model has the following beneficial effects:

[0016] 1. In the present utility model, by providing a driving mechanism, an effective and uniform extrusion and fixing effect can be formed on accessories of different shapes. Through pneumatic transmission, a plurality of fixing components form a uniform extrusion force on the periphery of the accessory, improving the fixing adaptability to accessories of different shapes and the fixing efficiency of automotive spare parts.

[0017] 2. In the present utility model, by providing a fixing component, controlling the solenoid valve improves the stability of the fixing component during operation. When the fixing component completes the fixing, the connection with the output end of the driving air pump is cut off, effectively avoiding the influence of the output fluctuation of the driving air pump on the force of the fixing component on the accessory. At the same time, cooperating with the air spraying pipe is beneficial to cleaning the waste chips generated during the grinding process of the accessory by the airflow output by the driving air pump.

[0018] 3. In the present utility model, by providing a limiting hole and cooperating with the locking assembly, the stability of the fixing component during operation is further improved. At the same time, cooperating with the working air spraying pipe, collection bin and exhaust pipe to complete the collection of waste chips. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a partial top view schematic diagram of the present utility model;

[0020] Figure 2 It is a structural schematic diagram of the present utility model;

[0021] Figure 3 is Figure 2 The enlarged schematic diagram of part A in

[0022] In the figure: 1 grinding box, 2 grinding mechanism, 3 placing table, 31 limiting groove, 32 limiting hole, 4 driving mechanism, 41 driving air pump, 42 fixed air disc, 421 air storage cavity, 43 connecting pipe, 44 solenoid valve, 45 air injection pipe, 5 fixing component, 51 sealing rod, 511 connecting groove, 52 fixing block, 521 sliding groove, 522 locking groove, 523 extrusion switch, 53 sliding block, 531 square groove, 54 extrusion spring, 6 locking component, 61 wedge block, 62 restoring spring, 7 collection bin, 71 exhaust pipe, 72 filter screen. Specific embodiments

[0023] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments.

[0024] Refer to Figures 1-3 , an automobile spare part grinding device, including a grinding box 1, a grinding mechanism 2 is connected in the grinding box 1, wherein the grinding mechanism 2 is used for grinding the surface of spare parts. The grinding mechanism 2 adopts the prior art and includes a three-dimensional moving frame, a grinding motor and a grinding head. The three-dimensional moving frame is installed in the grinding box 1, the grinding motor is installed on the output end of the three-dimensional moving frame, the grinding head is coaxially and fixedly connected to the grinding motor, the three-dimensional moving frame is used to control the grinding motor to move horizontally, longitudinally and vertically, and when the grinding motor works, its output end drives the grinding head to rotate, and the grinding head grinds the surface of the parts.

[0025] A placing table 3 is fixedly connected to the inner bottom of the grinding box 1. A driving mechanism 4 is connected to the placing table 3. The driving mechanism 4 includes a driving air pump 41, a fixed air disc 42, a connecting pipe 43, and a solenoid valve 44. An installation seat is fixedly connected to the outside of the grinding box 1, and the driving air pump 41 is installed on the installation seat. The fixed air disc 42 is fixedly connected to the placing table 3. Among them, the parts to be processed are placed in the fixed air disc 42. An air storage cavity 421 is formed in the fixed air disc 42. The output end of the driving air pump 41 is communicated with a hose, and one end of the hose away from the driving air pump 41 is communicated with the air storage cavity 421. A plurality of connecting pipes 43 are communicated with the inner side of the air storage cavity 421, and solenoid valves 44 are installed in the middle of the plurality of connecting pipes 43. One end of the connecting pipe 43 away from the fixed air disc 42 is connected with a fixing component 5. The fixed air disc 42 is in a rectangular frame shape, and the plurality of connecting pipes 43 are evenly distributed on the inner peripheral side of the rectangular frame shape, and the axial direction of the connecting pipe 43 is perpendicular to the inner side of the rectangular frame shape. When the driving air pump 41 works, the output end of the driving air pump 41 inflates the air storage cavity 421 of the fixed air disc 42 through the hose. The air pressure in the air storage cavity 421 increases, and a plurality of fixing components 5 are pushed to move through the plurality of connecting pipes 43, so that the plurality of fixing components 5 form extrusion fixation on the periphery of the fitting. Under the action of pneumatic transmission, the plurality of fixing components 5 form a uniform extrusion force on the periphery of the fitting, which is convenient for forming an effective extrusion fixation effect on fittings of different shapes.

[0026] The fixing component 5 includes a sealing rod 51, a fixing block 52, a sliding block 53, and a compression spring 54. The sealing rod 51 is hermetically and slidably connected in the connecting pipe 43. One end of the sealing rod 51 away from the fixed air disc 42 is fixedly connected with a fixing block 52. A sliding groove 521 is formed in the fixing block 52. A sliding block 53 is hermetically and slidably connected to the inner end of the sliding groove 521 away from the connecting pipe 43. A compression spring 54 is fixedly connected between the sliding block 53 and the inner end of the sliding groove 521. An extrusion switch 523 is installed at the inner end of the sliding groove 521. The extrusion switch 523 is electrically connected to the solenoid valve 44. When the air pressure in the input end of the connecting pipe 43 increases, the sealing rod 51 is pushed to move, thereby pushing the fixing block 52 and the sliding block 53 to move. After the sliding block 53 contacts the edge of the fitting, the sealing rod 51 continues to move and further pushes the sliding block 53 to overcome the elastic force of the compression spring 54 and penetrate into the sliding groove 521 until the sliding block 53 squeezes and opens the extrusion switch 523, controlling the valve core of the solenoid valve 44 corresponding to this extrusion switch 523 to block the input end of the connecting pipe 43, separate the output end of the connecting pipe 43 and the jet pipe 45, so that the air pressure in the output end of the connecting pipe 43 is not affected by the output air pressure fluctuation of the driving air pump 41, and the stability of the fixing component 5 is improved.

[0027] A communication groove 511 is provided inside the sealing rod 51. One end of the communication groove 511 communicates with the communication pipe 43, and the other end communicates with the sliding groove 521. An annular groove is provided at one end of the sliding block 53 close to the fixed block 52. One end of the compression spring 54 away from the fixed block 52 is fixedly connected inside the annular groove. The minimum axial length of the compression spring 54 is less than the depth of the annular groove. The sliding block 53 is in sealing cooperation with the communication groove 511. After the sliding block 53 extends into the sliding groove 521, it forms a sealing block for the communication groove 511, further improving the stability of the fixed block 52.

[0028] The solenoid valve 44 adopts a three-position three-way valve. The inlet end and one outlet end of the solenoid valve 44 communicate with the communication pipe 43, and the other outlet end communicates with the air injection pipe 45. The output ends of multiple air injection pipes 45 point to the center of the placement table 3. In the initial state, the solenoid valve 44 blocks the air injection pipe 45 and makes the input end and output end of the communication pipe 43 communicate. After a single extrusion switch 523 is extruded and opened, it controls the valve core of the solenoid valve 44 corresponding to this extrusion switch 523 to block the input end of the communication pipe 43 and separate the output end of the communication pipe 43 and the air injection pipe 45. After all the extrusion switches 523 are extruded and opened, it controls the valve core of the solenoid valve 44 to block the output end of the communication pipe 43 and make the input end of the communication pipe 43 communicate with the air injection pipe 45, avoiding directly communicating the input end of the communication pipe 43 with the air injection pipe 45 after the extrusion switch 523 is extruded and opened, so as to avoid reducing the air pressure in the air storage cavity 421 and affecting the extrusion and fixation of other fixing components 5 on the fittings.

[0029] A plurality of limiting grooves 31 are provided on the placement table 3. The bottoms of the plurality of fixed blocks 52 are slidably connected to the plurality of limiting grooves 31 one by one. During the movement of the fixed block 52, a limiting effect is formed on the fixed block 52 in the radial direction of the communication pipe 43, further improving the stability of the fixed block 52 during operation.

[0030] The bottom of the fixed block 52 is connected with a locking component 6. A plurality of limiting holes 32 are provided on the placement table 3. The output end of the locking component 6 is clamped in the limiting holes 32. The locking component 6 includes a wedge-shaped block 61 and a restoring spring 62. A locking groove 522 is provided at the bottom of the fixed block 52. The top of the locking groove 522 communicates with the sliding groove 521. The wedge-shaped block 61 is slidably connected in the locking groove 522. A restoring spring 62 is fixedly connected between the wedge-shaped block 61 and the fixed block 52. A square groove 531 is provided at the bottom of the sliding block 53. The top end of the wedge-shaped block 61 extends into the square groove 531. The wedge-shaped surface of the wedge-shaped block 61 faces the side of the square groove 531 away from the communication pipe 43. The bottom end of the wedge-shaped block 61 is clamped in the limiting hole 32. When the sliding block 53 extends into the sliding groove 521, the wedge-shaped block 61 is pushed downward through the square groove 531, so that the wedge-shaped block 61 is clamped into the limiting hole 32, facilitating the formation of a limiting effect on the fixed block 52 and improving the stability of the fixed block 52 during operation.

[0031] A plurality of limiting holes 32 are distributed in a rectangular array on the placing table 3. The axial directions of the plurality of connecting pipes 43 coincide with the rectangular array of the plurality of limiting holes 32. A collecting bin 7 is opened in the placing table 3. The top of the collecting bin 7 communicates with the plurality of limiting holes 32. While the limiting holes 32 limit the wedge-shaped blocks 61, it is convenient to cooperate with the air jet pipe 45 to collect the waste chips in the collecting bin 7 through air flow. One side of the collecting bin 7 communicates with an exhaust pipe 71. A filter screen 72 is fixedly connected in the exhaust pipe 71. The filter screen 72 prevents the waste chips from being directly discharged through the exhaust pipe 71, which is convenient for collecting the waste chips.

[0032] When grinding auto parts, place the parts at the center of the fixed air disc 42 on the placing table 3, start the driving air pump 41 in the driving mechanism 4. The driving air pump 41 works, and the output end of the driving air pump 41 inflates the air storage cavity 421 of the fixed air disc 42 through a hose. The air pressure in the air storage cavity 421 increases, and through the plurality of connecting pipes 43, the sealing rods 51 in the plurality of fixing components 5 are pushed to move. The movement of the plurality of sealing rods 51 drives the fixing blocks 52 and the sliding blocks 53 to move synchronously until the plurality of sliding blocks 53 contact the edge of the part. At this time, as the air pressure in the air storage cavity 421 increases, the sealing rod 51 continues to move and further pushes the sliding block 53 to overcome the elastic force of the compression spring 54 and penetrate into the sliding groove 521 of the fixing block 52 until the sliding block 53 abuts against the inner wall of the sliding groove 521 to squeeze and open the squeeze switch 523, controlling the valve core of the solenoid valve 44 corresponding to this squeeze switch 523 to block the input end of the connecting pipe 43, separate the output end of the connecting pipe 43 and the air jet pipe 45, so that the air pressure in the output end of the connecting pipe 43 is not affected by the output air pressure fluctuation of the driving air pump 41, improving the stability of the fixing component 5;

[0033] At the same time, the sliding block 53 moves. The sliding block 53 pushes the wedge-shaped block 61 to move downward through the square groove 531 at the bottom of itself. The wedge-shaped block 61 overcomes the restoring spring 62 and moves downward to be stuck in the limiting hole 32, forming a limit on the position of the fixing block 52 along the axial direction of the connecting pipe 43. After the plurality of fixing blocks 52 are limited, the stability of the fixing component 5 is further improved, and the fixing effect on the periphery of the part is improved;

[0034] Until all the squeeze switches 523 are squeezed and opened, control the valve core of the solenoid valve 44 to block the output end of the connecting pipe 43, and make the input end of the connecting pipe 43 communicate with the air jet pipe 45. The air jet pipe 45 starts to jet air on the parts. Start the grinding mechanism 2 to grind the parts. The air flow ejected by the air jet pipe 45 clears the waste chips generated during the grinding of the parts, and makes the waste chips fall into the collecting bin 7 through the limiting holes 32. The air in the grinding box 1 is discharged outward through the limiting holes 32, the collecting bin 7 and the exhaust pipe 71. The air flow drives the waste chips to fall into the collecting bin 7, completing the collection effect of the waste chips.

[0035] In the present utility model, by providing a driving mechanism 4, an effective and uniform extrusion and fixation effect can be formed on accessories of different shapes. Compared with the conventional method of using two sets of extrusion cylinders and extrusion plates to clamp and fix the accessories from both sides, through pneumatic transmission, a plurality of fixing components 5 form a uniform extrusion force on the periphery of the accessories, improving the fixing adaptability to accessories of different shapes;

[0036] In the present utility model, by providing the fixing components 5, controlling the solenoid valve 44 improves the working stability of the fixing components 5. Compared with the method of directly maintaining the fixation of the accessories by the fixing components 5 through the driving air pump 41, when the fixing components 5 complete the fixation, the connection with the output end of the driving air pump 41 is cut off, effectively avoiding the influence of the output fluctuation of the driving air pump 41 on the acting force of the fixing components 5 on the accessories. At the same time, in cooperation with the air jet pipe 45, it is beneficial to clean the waste chips generated during the grinding of the accessories by the airflow output by the driving air pump 41;

[0037] In the present utility model, by providing the limiting holes 32, cooperating with the locking components 6 further improves the working stability of the fixing components 5. At the same time, in cooperation with the working air jet pipe 45, the collection bin 7 and the exhaust pipe 71, the collection of waste chips is completed.

[0038] The above is only a preferred specific embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present utility model, according to the technical solution of the present utility model and its inventive concept, makes equivalent substitutions or changes, and all should be covered within the protection scope of the present utility model.

Claims

1. An automobile spare part grinding device, including a grinding box (1), a grinding mechanism (2) is connected inside the grinding box (1), and the grinding mechanism (2) is used for grinding the surface of the spare part. It is characterized in that, A placing table (3) is fixedly connected to the inner bottom of the grinding box (1). A driving mechanism (4) is connected to the placing table (3). The driving mechanism (4) includes a driving air pump (41), a fixed air disc (42), a connecting pipe (43), and an electromagnetic valve (44). A mounting seat is fixedly connected to the outside of the grinding box (1). The driving air pump (41) is installed on the mounting seat. The fixed air disc (42) is fixedly connected to the placing table (3). Wherein, the spare parts to be processed are placed in the fixed air disc (42). An air storage cavity (421) is formed in the fixed air disc (42). The output end of the driving air pump (41) is communicated with a hose. One end of the hose away from the driving air pump (41) is communicated with the air storage cavity (421). A plurality of connecting pipes (43) are communicated with the inner side of the air storage cavity (421). Electromagnetic valves (44) are installed in the middle of the plurality of connecting pipes (43). One end of the connecting pipe (43) away from the fixed air disc (42) is connected with a fixing component (5).

2. The automotive parts grinding device according to claim 1, characterized in that, The fixing component (5) includes a sealing rod (51), a fixing block (52), a sliding block (53), and a compression spring (54). The sealing rod (51) is hermetically and slidably connected in the connecting pipe (43). A fixing block (52) is fixedly connected to one end of the sealing rod (51) away from the fixed air disc (42). A sliding groove (521) is formed in the fixing block (52). A sliding block (53) is hermetically and slidably connected to one end of the sliding groove (521) away from the connecting pipe (43). A compression spring (54) is fixedly connected between the sliding block (53) and the inner end of the sliding groove (521). An extrusion switch (523) is installed at the inner end of the sliding groove (521). The extrusion switch (523) is electrically connected to the electromagnetic valve (44). A locking component (6) is connected to the bottom of the fixing block (52). A plurality of limiting holes (32) are formed in the placing table (3). The output end of the locking component (6) is clamped in the limiting holes (32).

3. A grinding device for automobile spare parts according to claim 2, characterized in that, The fixed air disc (42) is in a rectangular frame shape. The plurality of connecting pipes (43) are uniformly distributed on the inner peripheral side of the rectangular frame shape, and the axial direction of the connecting pipe (43) is perpendicular to the inner side of the rectangular frame shape.

4. An automobile spare part grinding device according to claim 3, characterized in that, The electromagnetic valve (44) adopts a three-position three-way valve. Wherein, the inlet end and one outlet end of the electromagnetic valve (44) are communicated with the connecting pipe (43), and the other outlet end is communicated with a jet pipe (45). The output ends of the plurality of jet pipes (45) point to the center of the placing table (3).

5. An automotive parts grinding device according to claim 4, characterized in that, A plurality of limiting grooves (31) are formed in the placing table (3). The bottoms of the plurality of fixing blocks (52) are slidably connected to the plurality of limiting grooves (31) in a one-to-one correspondence.

6. An automotive parts grinding device according to claim 5, characterized in that, A communication groove (511) is formed in the sealing rod (51). One end of the communication groove (511) communicates with the communication pipe (43), and the other end communicates with the sliding groove (521). An annular groove is formed at one end of the sliding block (53) close to the fixed block (52). One end of the compression spring (54) away from the fixed block (52) is fixedly connected in the annular groove. The minimum axial length of the compression spring (54) is less than the depth of the annular groove. The sliding block (53) is in sealing fit with the communication groove (511).

7. An automotive parts grinding device according to claim 6, characterized in that, The locking assembly (6) includes a wedge block (61) and a restoring spring (62). A locking groove (522) is formed at the bottom of the fixed block (52). The top of the locking groove (522) communicates with the sliding groove (521). The wedge block (61) is slidably connected in the locking groove (522). A restoring spring (62) is fixedly connected between the wedge block (61) and the fixed block (52). A square groove (531) is formed at the bottom of the sliding block (53). The top end of the wedge block (61) extends into the square groove (531). The wedge surface of the wedge block (61) faces the side of the square groove (531) away from the communication pipe (43). The bottom end of the wedge block (61) is clamped in the limiting hole (32).

8. An automobile spare part grinding device according to claim 7, characterized in that, A plurality of the limiting holes (32) are distributed in a rectangular array on the placing table (3). The axial directions of a plurality of the communication pipes (43) coincide with the rectangular array of the plurality of limiting holes (32).

9. The grinding device for automobile spare parts according to claim 8, wherein, A collection bin (7) is formed in the placing table (3). The top of the collection bin (7) communicates with the plurality of limiting holes (32). An exhaust pipe (71) is communicated with one side of the collection bin (7). A filter screen (72) is fixedly connected in the exhaust pipe (71).

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