A punching device for automobile control arm

Abstract

This invention belongs to the field of punching equipment technology and discloses a punching device for an automotive control arm. Its key technical features include: a base with guide rods fixedly installed around its perimeter; a top plate fixedly installed at the top of multiple guide rods; a hydraulic cylinder fixedly installed on the surface of the top plate; a pressure plate fixedly installed at the telescopic end of the hydraulic cylinder; a processing groove on the surface of the base; a punching mechanism within the base, comprising a clamping assembly and a punching assembly; a second control cavity inside the base; a second through hole on the side wall of the second control cavity; and a deburring mechanism within the second control cavity, comprising grinding discs, a positioning assembly, and an adjusting assembly. By setting the positioning assembly and the adjusting assembly to cooperate, the positions of multiple grinding discs can be easily adjusted, allowing for efficient grinding and deburring of both sides of the hole.

Description

Technical Field

[0001] This invention relates to the field of punching equipment technology, specifically a punching device for automotive control arms. Background Technology

[0002] The control arm, also known as the swing arm, is a core component of the automotive suspension system, primarily responsible for connecting the wheel steering knuckle to the chassis. It elastically connects the wheel and body via ball joints or bushings, transmitting various forces acting on the wheel to the body while ensuring the wheel moves along a specific trajectory.

[0003] During the production and processing of the control arm, punching is required at the ends of the control arm. Existing punching equipment generally performs punching in the vertical direction. When punching the two ends of the U-shaped control arm, the ends of the control arm need to be punched twice. During the punching process, the control arm needs to be installed and disassembled multiple times, resulting in low punching efficiency. In addition, after punching, there are many burrs on both sides of the hole. Existing punching equipment cannot polish the sides of the hole, resulting in poor performance. Summary of the Invention

[0004] The purpose of this invention is to provide a punching device for an automotive control arm to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] A punching device for an automotive control arm includes a base, with guide rods fixedly installed around the base. A top plate is fixedly installed at the top of multiple sets of guide rods. A hydraulic cylinder is fixedly installed on the surface of the top plate, and a pressure plate is fixedly installed at the telescopic end of the hydraulic cylinder. A machining groove is formed on the surface of the base, and the machining groove is configured as a Y-shape. A control arm body is placed in the machining groove. A punching mechanism that cooperates with the control arm body is provided in the base. The punching mechanism includes a clamping assembly and a punching assembly. The clamping assembly is located on the bottom wall of the pressure plate. When the pressure plate moves vertically downward, the clamping assembly is used to fix the position of the control arm body within the machining groove. The punching assembly... Located inside the base, the punching assembly is used to punch the control arm body inside the processing groove. The base has two sets of second control cavities located outside the processing groove. The sidewall of the second control cavity has a second through hole communicating with the processing groove. The second control cavity is equipped with a deburring mechanism, which includes a grinding disc, a positioning component, and an adjusting component. The positioning component is located inside the second control cavity and is connected to the grinding disc. The positioning component is used to adjust the position of the grinding disc inside the second control cavity. The adjusting component is connected to the positioning component and is used to adjust the relative positions between multiple sets of grinding discs by cooperating with the positioning component.

[0007] As a further embodiment of the present invention: the clamping assembly includes two sets of oppositely distributed storage slots with the bottom wall of the pressure plate opening upwards, a compression plate is slidably installed in the storage slot, the bottom end of the compression plate extends to the outside of the storage slot, a clamping slot is opened at the bottom end of the compression plate, and a compression spring is fixedly installed on the top wall of the storage slot, and the extension end of the compression spring is connected to the compression plate.

[0008] As a further aspect of the present invention: the punching assembly includes two sets of first control cavities located inside the processing groove, each set having a first through hole communicating with the processing groove on its sidewall. Limiting rings cooperating with the control arm body are fixedly installed on opposite sidewalls of the processing groove. A sliding block is slidably installed within the first control cavity. A stamping column is fixedly installed on the sidewall of the sliding block. A vertical hole is opened in the middle of the base. A telescopic column is slidably installed within the vertical hole. A positioning spring is fixedly installed at the bottom of the vertical hole. The telescopic end of the positioning spring is connected to the bottom end of the telescopic column. A push rod is rotatably installed on the sidewall of the telescopic column. The end of the push rod away from the telescopic column extends into the first control cavity and is rotatably connected to the sliding block.

[0009] As a further aspect of the present invention: the positioning assembly includes an electric telescopic rod fixedly installed at the end of the second control cavity away from the processing groove, a bearing plate fixedly connected to the telescopic end of the electric telescopic rod, a motor fixedly installed on the surface of the bearing plate, a bearing column fixedly installed on the output shaft of the motor, two rows of positioning rods rotatably installed on the surface of the bearing column, each row of positioning rods having multiple sets and arranged in a ring around the bearing column, a grinding disc fixedly installed at the end of the positioning rod away from the bearing column, a support spring fixedly installed on the surface of the bearing column, and the telescopic end of the support spring connected to the positioning rod.

[0010] As a further aspect of the present invention: the adjustment assembly includes a groove formed inside the support column, the two ends of the groove extending to the surface of the support column respectively, a control rope fixedly installed on the surface of the positioning rod, the end of the control rope away from the positioning rod passing through the groove and fixedly installed with a positioning ring, the positioning ring being made of magnetic material and sleeved on the surface of the support column, and multiple sets of brackets fixedly installed on the inner sidewall of the second control cavity, the multiple sets of brackets jointly fixedly installing the magnetic ring.

[0011] As a further embodiment of the present invention: a retaining ring is fixedly installed on the surface of the bearing column by a support rod, the retaining ring is sleeved on the outside of the positioning rod, and multiple sets of baffles distributed in pairs are fixedly installed on the surface of the retaining ring, with the two sets of baffles distributed in pairs located on both sides of the positioning rod.

[0012] As a further embodiment of the present invention: the bottom wall of the second control cavity is provided with a guide groove extending to the outside of the base.

[0013] Compared with the prior art, the beneficial effects of the present invention are: by setting the clamping component and the punching component to cooperate with each other, the two sides of the control arm body can be punched simultaneously, which effectively improves the punching efficiency and solves the problem that the end of the control arm needs to be punched twice, and the control arm needs to be installed and disassembled multiple times during the punching process, resulting in low punching efficiency.

[0014] By setting up positioning and adjustment components to work together, the positions of multiple grinding discs can be easily adjusted. These multiple grinding discs can efficiently grind and deburr both sides of the hole, solving the problem that existing punching equipment cannot grind and polish both sides of the hole, resulting in poor performance. Attached Figure Description

[0015] Figure 1 This is a three-dimensional structural diagram of a punching device for an automotive control arm provided in an embodiment of the present invention.

[0016] Figure 2 This is a front view schematic diagram of a punching device for an automotive control arm provided in an embodiment of the present invention.

[0017] Figure 3 This is a schematic diagram of the machining groove in a punching device for an automotive control arm provided in an embodiment of the present invention.

[0018] Figure 4 This is a schematic diagram of the internal cross-sectional structure of the base in a punching device for an automotive control arm provided in an embodiment of the present invention.

[0019] Figure 5 This is a schematic diagram of the bearing column and its connection structure in a punching device for an automotive control arm provided in an embodiment of the present invention.

[0020] Figure 6 This is a schematic diagram of a grinding disc and its connection structure in a punching device for an automotive control arm provided in an embodiment of the present invention.

[0021] Figure 7 for Figure 2 A magnified structural diagram of A in the diagram.

[0022] Figure 8 for Figure 2 A magnified structural diagram of B in the diagram.

[0023] Figure 9 for Figure 4 A magnified structural diagram of C.

[0024] The components are: 1-base, 11-guide rod, 12-top plate, 2-hydraulic cylinder, 21-pressure plate, 3-processing groove, 4-control arm body, 5-punching mechanism, 51-clamping assembly, 511-storage groove, 512-extrusion plate, 513-extrusion spring, 514-clamping groove, 52-punching assembly, 521-limiting ring, 522-first control cavity, 523-sliding block, 524-punching column, 525-first through hole, 526-vertical hole, 527-positioning spring, 528 - Telescopic column, 529-Push rod, 6-Second control cavity, 61-Second through hole, 7-Deburring mechanism, 71-Grinding disc, 72-Positioning assembly, 721-Electric telescopic rod, 722-Bearing plate, 723-Motor, 724-Bearing column, 725-Positioning rod, 726-Support spring, 73-Adjusting assembly, 731-Wire groove, 732-Control rope, 733-Positioning ring, 734-Bracket, 735-Magnetic ring, 8-Stop ring, 9-Baffle, 10-Guide groove. Detailed Implementation

[0025] It should be noted that, unless otherwise specified, the embodiments and features described in the present invention can be combined with each other.

[0026] The specific implementation of the present invention will be described in detail below with reference to specific embodiments.

[0027] like Figure 1 , Figure 2 , Figure 3 , Figure 8The diagram shows a structural diagram of a punching device for an automotive control arm according to an embodiment of the present invention. It includes a base 1, with guide rods 11 fixedly installed around the base 1. A top plate 12 is fixedly installed at the top of multiple sets of guide rods 11. A hydraulic cylinder 2 is fixedly installed on the surface of the top plate 12, and a pressure plate 21 is fixedly installed at the telescopic end of the hydraulic cylinder 2. A machining groove 3 is formed on the surface of the base 1, and the machining groove 3 is configured as a Y-shape. A control arm body 4 is placed inside the machining groove 3. A punching mechanism 5, which cooperates with the control arm body 4, is provided inside the base 1. The punching mechanism 5 includes a clamping assembly 51 and a punching assembly 52. ​​The clamping assembly 51 is located on the bottom wall of the pressure plate 21. When the pressure plate 21 moves vertically downward, the clamping assembly 51 is used to fix the position of the control arm body 4 within the machining groove 3. The punching assembly 52 is located inside the base 1 and is used to punch the control arm body 4 inside the processing groove 3. The base 1 has two sets of second control cavities 6 located outside the processing groove 3. The side wall of the second control cavity 6 has a second through hole 61 that communicates with the processing groove 3. The second control cavity 6 is provided with a deburring mechanism 7. The deburring mechanism 7 includes a grinding disc 71, a positioning assembly 72 and an adjusting assembly 73. The positioning assembly 72 is located inside the second control cavity 6 and is connected to the grinding disc 71. The positioning assembly 72 is used to adjust the position of the grinding disc 71 inside the second control cavity 6. The adjusting assembly 73 is connected to the positioning assembly 72 and is used to adjust the relative position between multiple sets of grinding discs 71 by cooperating with the positioning assembly 72.

[0028] Initially, the positioning component 72 supports and positions the grinding disc 71 within the second control cavity 6, placing the control arm body 4 to be processed into the processing groove 3. The hydraulic cylinder 2 pushes the pressure plate 21 to move vertically downward. During the downward movement of the pressure plate 21, the clamping component 51 can stably fix the control arm body 4 within the processing groove 3. As the pressure plate 21 continues to move downward, the punching component 52 can simultaneously punch holes at both ends of the control arm body 4. After punching is completed and the hydraulic cylinder 2 controls the pressure plate 21 to move vertically upward a certain distance, the punching assembly 52 separates from the control arm body 4. The clamping assembly 51 continues to press and fix the control arm body 4. The positioning assembly 72 pushes the grinding disc 71 towards the processing groove 3. The positioning assembly 72 and the adjusting assembly 73 cooperate to synchronously adjust the relative distance between multiple sets of grinding discs 71, thereby controlling the grinding discs 71 to pass through the second through hole 61 and move into the processing groove 3. Some grinding discs 71 further pass through the holes on the surface of the control arm body 4. Multiple sets of grinding discs 71 are respectively located on both sides of the holes on the surface of the control arm body 4. The positioning assembly 72 controls the grinding discs 71 to rotate. When the grinding discs 71 rotate, they can efficiently grind and deburr both sides of the holes on the surface of the control arm body 4, effectively improving the punching effect of the control arm body 4. After grinding is completed, the positioning assembly 72 and the adjusting assembly 73 cooperate to control the multiple sets of grinding discs 71 to move in the opposite direction into the second control cavity 6. The hydraulic cylinder 2 pulls the pressure plate 21 to move vertically upward, and the clamping assembly 51 releases the restriction on the control arm body 4, allowing the operator to easily remove the punched control arm body 4 from the processing slot 3.

[0029] like Figure 1 , Figure 2 As shown, in a preferred embodiment of the present invention, the clamping assembly 51 includes two sets of oppositely distributed storage grooves 511 with the bottom wall of the pressure plate 21 facing upward. A compression plate 512 is slidably installed in the storage groove 511. The bottom end of the compression plate 512 extends to the outside of the storage groove 511. A clamping groove 514 is provided at the bottom end of the compression plate 512. A compression spring 513 is fixedly installed on the top wall of the storage groove 511. The extension end of the compression spring 513 is connected to the compression plate 512.

[0030] When the pressure plate 21 moves vertically downward, it drives the extrusion plate 512 to move downward synchronously. After the clamping groove 514 at the bottom of the extrusion plate 512 engages with the control arm body 4, the pressure plate 21 continues to move downward. At this time, the extrusion plate 512 moves upward relative to the receiving groove 511, and the extrusion spring 513 is continuously compressed. The extrusion plate 512 continuously applies pressure to the control arm body 4, which can conveniently fix the control arm body 4 in the processing groove 3.

[0031] like Figure 1 , Figure 3 , Figure 4 , Figure 8 , Figure 9 As shown, in a preferred embodiment of the present invention, the punching assembly 52 includes two sets of first control cavities 522 respectively located inside the processing groove 3 within the base 1. The sidewall of the first control cavity 522 is provided with a first through hole 525 communicating with the processing groove 3. The two opposite sidewalls of the processing groove 3 are respectively fixedly installed with limiting rings 521 that cooperate with the control arm body 4. A sliding block 523 is slidably installed in the first control cavity 522. A stamping column 524 is fixedly installed on the sidewall of the sliding block 523. A vertical hole 526 is provided in the middle of the base 1. A telescopic column 528 is slidably installed in the vertical hole 526. A positioning spring 527 is fixedly installed at the bottom of the vertical hole 526. The telescopic end of the positioning spring 527 is connected to the bottom end of the telescopic column 528. A push rod 529 is rotatably installed on the sidewall of the telescopic column 528. The end of the push rod 529 away from the telescopic column 528 extends into the first control cavity 522 and is rotatably connected to the sliding block 523.

[0032] The positioning spring 527 supports and positions the telescopic column 528 in the vertical hole 526. The top of the telescopic column 528 extends above the base 1. The pressure plate 21 moves continuously downward and squeezes the telescopic column 528, thereby pushing the telescopic column 528 into the vertical hole 526. The telescopic column 528 cooperates with the push rod 529 to push the sliding blocks 523 on both sides to move synchronously in the first control cavity 522. The sliding blocks 523 push the stamping column 524 into the processing groove 3. The stamping column 524 can automatically punch holes in the control arm body 4 in the processing groove 3. After punching is completed, hydraulic cylinder 2 pulls pressure plate 21 to move vertically upward. At this time, positioning spring 527 pushes telescopic column 528 to move vertically upward in vertical hole 526. Telescopic column 528 and push rod 529 cooperate to pull sliding block 523 to move in the opposite direction in first control cavity 522. Sliding block 523 drives stamping column 524 to move as a whole into first control cavity 522. At this time, stamping column 524 and control arm body 4 are separated.

[0033] like Figure 2 , Figure 4 , Figure 5 , Figure 6 , Figure 7As shown, in a preferred embodiment of the present invention, the positioning component 72 includes an electric telescopic rod 721 fixedly installed at one end of the second control cavity 6 away from the processing groove 3. The telescopic end of the electric telescopic rod 721 is fixedly connected to a bearing plate 722. A motor 723 is fixedly installed on the surface of the bearing plate 722. A bearing column 724 is fixedly installed on the output shaft of the motor 723. Two rows of positioning rods 725 are rotatably installed on the surface of the bearing column 724. Each row of positioning rods 725 has multiple sets and is arranged in a ring around the bearing column 724. The grinding disc 71 is fixedly installed at the end of the positioning rod 725 away from the bearing column 724. A support spring 726 is fixedly installed on the surface of the bearing column 724. The telescopic end of the support spring 726 is connected to the positioning rod 725.

[0034] The support spring 726 supports and positions the positioning rod 725 on the surface of the bearing column 724. The positioning rod 725 is kept in an inclined state on the surface of the bearing column 724, and the positioning rod 725 supports and positions the grinding disc 71. When deburring is required on the holes on the surface of the control arm body 4, the electric telescopic rod 721 pushes the bearing plate 722 to move within the second control cavity 6. The bearing plate 722 drives the motor 723 and the grinding disc 71 to move synchronously. While the bearing column 724 drives the grinding disc 71 to move into the processing groove 3, the adjustment component 73 can control the positioning rod 725 to rotate towards the surface of the bearing column 724. Multiple sets of grinding discs 71 can easily pass through the second through hole 61, and further control a row of positioning rods 725 and grinding discs 71 on the surface of the bearing column 724 to pass through the holes on the surface of the control arm body 4. At this time, the two sets of grinding discs 71 are respectively located on both sides of the hole. The support spring 726 applies a pushing force to the positioning rod 725, and the grinding discs 71 are in contact with both sides of the hole. The motor 723 drives the bearing column 724 to rotate, and the bearing column 724 drives the grinding discs 71 to rotate synchronously. The grinding discs 71 can efficiently grind the burrs on both sides of the hole. After grinding is completed, the electric telescopic rod 721 drives the bearing plate 722 to move in the opposite direction. At this time, the bearing column 724 drives the grinding disc 71 to move into the second control cavity 6. The adjustment component 73 adjusts the position of the positioning rod 725 and the grinding disc 71 again, so that multiple sets of grinding discs 71 can pass through the second through hole 61.

[0035] like Figure 2 , Figure 5 , Figure 6 , Figure 7As shown, in a preferred embodiment of the present invention, the adjustment component 73 includes a groove 731 formed inside the support column 724. Both ends of the groove 731 extend to the surface of the support column 724. A control rope 732 is fixedly installed on the surface of the positioning rod 725. One end of the control rope 732 away from the positioning rod 725 passes through the groove 731 and is fixedly installed with a positioning ring 733. The positioning ring 733 is made of magnetic material and is sleeved on the surface of the support column 724. Multiple sets of brackets 734 are fixedly installed on the inner sidewall of the second control cavity 6. The multiple sets of brackets 734 are jointly fixedly installed with a magnetic ring 735.

[0036] When the bearing column 724 drives the grinding disc 71 to move towards the processing groove 3, it drives the positioning ring 733 to move synchronously. When the positioning ring 733 moves to the inside of the magnetic ring 735, the magnetic ring 735 is connected to the positioning ring 733 as a whole by magnetic attraction. The bearing column 724 drives the grinding disc 71 to continue moving. The positioning ring 733 and the control rope 732 cooperate with each other to pull the positioning rod 725 to rotate towards the surface of the bearing column 724. At this time, the grinding disc 71 moves synchronously towards the surface of the bearing column 724. Multiple sets of grinding discs 71 can easily pass through the second through hole 61, and a row of positioning rods 725 on the surface of the bearing column 724 moves to the other side of the hole. At this time, the positioning ring 733 and the magnetic ring 735 separate from each other, and the support spring 726 applies a pushing force to the positioning rod 725. The grinding disc 71 and the two sides of the hole are in contact with each other.

[0037] like Figure 6 , Figure 7 As shown, in a preferred embodiment of the present invention, a retaining ring 8 is fixedly installed on the surface of the bearing column 724 by a support rod. The retaining ring 8 is sleeved on the outside of the positioning rod 725. Multiple sets of baffles 9 are fixedly installed on the surface of the retaining ring 8, which are distributed in pairs. The two sets of baffles 9 are respectively located on both sides of the positioning rod 725.

[0038] The retaining ring 8 limits the rotation range of the positioning rod 725. The positioning rod 725 is located between two sets of baffles 9. When the bearing column 724 drives the positioning rod 725 to rotate, the baffles 9 and the retaining ring 8 cooperate with each other to effectively improve the stability of the positioning rod 725.

[0039] like Figure 2 , Figure 4 As shown, in a preferred embodiment of the present invention, the bottom wall of the second control cavity 6 is provided with a guide groove 10 extending to the outside of the base 1.

[0040] The working principle of this invention is as follows: The control arm body 4 to be processed is placed in the processing groove 3. The hydraulic cylinder 2 pushes the pressure plate 21 to move vertically downward. When the pressure plate 21 moves vertically downward, it drives the extrusion plate 512 to move downward synchronously. After the clamping groove 514 at the bottom of the extrusion plate 512 and the control arm body 4 are engaged with each other, the pressure plate 21 continues to move downward. At this time, the extrusion plate 512 moves upward relative to the receiving groove 511. The extrusion spring 513 is continuously compressed. The extrusion plate 512 continuously applies pressure to the control arm body 4, which can conveniently fix the control arm body 4 in the processing groove 3. The pressure plate 21 continues to move downwards, squeezing the telescopic column 528 and pushing it into the vertical hole 526. The telescopic column 528 and the push rod 529 cooperate to push the sliding blocks 523 on both sides to move synchronously within the first control cavity 522. The sliding blocks 523 push the stamping column 524 into the processing groove 3, allowing the stamping column 524 to automatically punch holes in the control arm body 4 within the processing groove 3. After punching, the hydraulic cylinder 2 pulls the pressure plate 21 vertically upwards. At this time, the positioning spring 527 pushes the telescopic column 528 vertically upwards within the vertical hole 526. The telescopic column 528 and the push rod 529 cooperate to pull the sliding block 523 to move in the opposite direction within the first control cavity 522. The sliding block 523 drives the stamping column 524 to move entirely into the first control cavity 522, at which point the stamping column 524 separates from the control arm body 4.

[0041] When deburring is required on the holes on the surface of the control arm body 4, the electric telescopic rod 721 pushes the bearing plate 722 to move within the second control cavity 6. The bearing plate 722 drives the motor 723 and the grinding disc 71 to move synchronously. Simultaneously, the bearing column 724 moves the grinding disc 71 towards the machining groove 3, and the positioning ring 733 moves synchronously. When the positioning ring 733 moves to the inside of the magnetic ring 735, the magnetic ring 735 connects to the positioning ring 733 through magnetic attraction, forming a single unit. The carrier column 724 drives the grinding disc 71 to continue moving. The positioning ring 733 and the control rope 732 cooperate to pull the positioning rod 725 to rotate towards the surface of the carrier column 724. At this time, the grinding disc 71 moves synchronously towards the surface of the carrier column 724. Multiple sets of grinding discs 71 can easily pass through the second through hole 61, and a row of positioning rods 725 on the surface of the carrier column 724 moves to the other side of the hole. At this time, the positioning ring 733 and the magnetic ring 735 separate from each other, and the support spring 726 applies a pushing force to the positioning rod 725, so that the grinding disc 71 and the two sides of the hole are in contact. The motor 723 drives the carrier column 724 to rotate, and the carrier column 724 drives the grinding disc 71 to rotate synchronously. The grinding disc 71 can efficiently grind the burrs on both sides of the hole. After grinding is completed, the electric telescopic rod 721 drives the bearing plate 722 to move in the opposite direction. At this time, the bearing column 724 drives the grinding disc 71 to move into the second control cavity 6. The position of the positioning rod 725 and the grinding disc 71 are adjusted again so that multiple sets of grinding discs 71 can pass through the second through hole 61.

[0042] The preferred embodiments of the present invention have been described in detail above. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present invention.

Claims

1. A punching device for an automotive control arm, comprising a base, guide rods fixedly installed around the base, a top plate fixedly installed at the top of multiple sets of guide rods, a hydraulic cylinder fixedly installed on the surface of the top plate, and a pressure plate fixedly installed at the telescopic end of the hydraulic cylinder, characterized in that... The base surface is provided with a machining groove, which is configured as a Y-shaped structure, and the control arm body is placed inside the machining groove; The base is provided with a punching mechanism that cooperates with the control arm body. The punching mechanism includes a clamping component and a punching component. The clamping assembly is located on the bottom wall of the pressure plate. When the pressure plate moves vertically downward, the clamping assembly is used to fix the position of the control arm body in the processing groove. The punching assembly is located in the base and is used to punch the control arm body in the processing groove. The base has two sets of second control chambers located on the outside of the processing groove, and the sidewalls of the second control chambers have second through holes that communicate with the processing groove. The second control cavity is provided with a deburring mechanism, which includes a grinding disc, a positioning component, and an adjustment component. The positioning component is located in the second control cavity and connected to the grinding disc. The positioning component is used to adjust the position of the grinding disc in the second control cavity. The positioning component includes an electric telescopic rod fixedly installed at the end of the second control cavity away from the processing groove. A bearing plate is fixedly connected to the telescopic end of the electric telescopic rod. A motor is fixedly installed on the surface of the bearing plate. A bearing column is fixedly installed on the output shaft of the motor. Two rows of positioning rods are rotatably installed on the surface of the bearing column. Each row of positioning rods has multiple sets and is arranged in a ring around the bearing column. The grinding disc is fixedly installed at the end of the positioning rod away from the bearing column. A support spring is fixedly installed on the surface of the bearing column. The telescopic end of the support spring is connected to the positioning rod. The adjustment component is connected to the positioning component. The adjustment component is used to adjust the relative positions between multiple sets of grinding discs by cooperating with the positioning component. The adjustment component includes a groove opened inside the support column. The two ends of the groove extend to the surface of the support column. A control rope is fixedly installed on the surface of the positioning rod. The end of the control rope away from the positioning rod passes through the groove and is fixedly installed with a positioning ring. The positioning ring is made of magnetic material and is sleeved on the surface of the support column. Multiple sets of brackets are fixedly installed on the inner side wall of the second control cavity. The multiple sets of brackets are jointly fixedly installed with a magnetic ring.

2. The punching device for an automotive control arm according to claim 1, characterized in that, The clamping assembly includes two sets of oppositely distributed storage slots with the bottom wall of the pressure plate facing upwards. A compression plate is slidably installed in the storage slot. The bottom end of the compression plate extends to the outside of the storage slot. A clamping slot is opened at the bottom end of the compression plate. A compression spring is fixedly installed on the top wall of the storage slot. The extension end of the compression spring is connected to the compression plate.

3. The punching device for an automotive control arm according to claim 1, characterized in that, The punching assembly includes two sets of first control cavities located inside the processing groove, each with a first through hole communicating with the processing groove on its side wall. Limiting rings that cooperate with the control arm body are fixedly installed on opposite side walls of the processing groove. A sliding block is slidably installed inside the first control cavity. A punching column is fixedly installed on the side wall of the sliding block. A vertical hole is opened in the middle of the base. A telescopic column is slidably installed inside the vertical hole. A positioning spring is fixedly installed at the bottom of the vertical hole. The telescopic end of the positioning spring is connected to the bottom end of the telescopic column. A push rod is rotatably installed on the side wall of the telescopic column. The end of the push rod away from the telescopic column extends into the first control cavity and is rotatably connected to the sliding block.

4. The punching device for an automotive control arm according to claim 1, characterized in that, A retaining ring is fixedly installed on the surface of the bearing column by a support rod. The retaining ring is sleeved on the outside of the positioning rod. Multiple sets of baffles are fixedly installed on the surface of the retaining ring, with the two sets of baffles located on both sides of the positioning rod.

5. The punching device for an automotive control arm according to claim 1, characterized in that, The bottom wall of the second control cavity is provided with a guide groove extending to the outside of the base.

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