Welding clamping device for automobile control arm

Abstract

The invention discloses a welding and clamping device for an automobile control arm, and relates to the technical field of automobile manufacturing, the welding and clamping device comprises an operation table, a base is fixedly mounted on the front surface of the operation table, a first control rod is arranged at the top of the base, a welding device is arranged at the bottom of a top cover, and the welding device is electrically connected with the first control rod; the supporting frame is fixedly installed on the top of the operation table, the connecting piece is fixedly installed on the face, close to the shell, of the supporting frame, the fixed disc is fixedly installed at the end, away from the supporting frame, of the connecting piece, and the rotating disc is rotationally installed on the face, away from the connecting piece, of the fixed disc. The sliding table is fixedly mounted on the face, away from the fixed disc, of the rotating disc, the first clamping plate is slidably mounted at the top of the sliding table, the first clamping plate can clamp the control arm, welding failure caused by position deviation of the control arm during welding is prevented, the reject ratio during machining is reduced, and the working efficiency is improved.

Description

Technical Field

[0001] The invention relates to the technical field of automobile manufacturing, in particular to a welding clamping device for an automobile control arm. Background Art

[0002] The welding clamping device for automobile control arms is a device used to fix and position automobile control arms during welding. It ensures that the control arm remains stable during welding to ensure welding quality and accuracy.

[0003] The patent with the patent announcement number CN204195121U relates to a welding clamping device for an automobile control arm, including an upper clamping device, a lower clamping device, a first clamping device, a second clamping device, a third clamping device, a sensor, and another sensor. An upper clamping device is respectively provided on the upper left side and the lower left side of the bottom plate, a first clamping device is provided on the upper side of the upper clamping device motor, a lower clamping device is provided on the bottom plate located on the lower side of the upper clamping device, a second clamping device is provided on the upper side of the lower clamping device motor, and the two upper clamping devices and the two lower clamping devices are bilaterally symmetrical. Compared with the prior art, this patent uses sensors for positioning monitoring, reduces the work intensity of workers, and improves the work efficiency of workers; at the same time, it improves the welding quality of automobile control arms.

[0004] In the above patent, sensors are used for positioning monitoring, which reduces the workload of workers and improves their work efficiency; at the same time, the welding quality of the automobile control arm is improved. However, when processing the control arm, excessive clamping may cause thermal deformation of the control arm during processing, affecting the appearance and reducing the product qualification rate. Summary of the invention

[0005] In view of the deficiencies of the prior art, the present invention provides a welding clamping device for an automobile control arm, which solves the problems raised in the above-mentioned background technology.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solutions: A welding clamping device for a vehicle control arm, comprising an operating table, a universal wheel is rotatably mounted at the bottom of the operating table, a shell is fixedly mounted on the top of the operating table, an observation door is fixedly mounted on the top of the operating table, a top cover is fixedly mounted on the top of the shell and the observation door, a base is fixedly mounted on the front of the operating table, a joystick 1 is arranged on the top of the base, a joystick 2 is arranged on the top of the base, a control button is arranged on the top of the base, a welding device is arranged at the bottom of the top cover, the welding device is electrically connected to the joystick 1, and a clamping device, a rotating device and a protective device are arranged on the top of the operating table; Wherein, the clamping device includes: a support frame, a connecting piece, a fixed disc, a rotating disc, a sliding table, a clamping plate 1, a clamping plate 2, a hollow push rod, a sliding rod, a transmission block, a fixed round rod and a limit block. The support frame is fixedly installed on the top of the operating table, the connecting piece is fixedly installed on the side of the support frame close to the outer shell, the fixed disc is fixedly installed on the end of the connecting piece away from the support frame, the rotating disc is rotatably installed on the side of the fixed disc away from the connecting piece, the sliding table is fixedly installed on the side of the rotating disc away from the fixed disc, the clamping plate 1 is slidably installed on the top of the sliding table, the clamping plate 2 is slidably installed on the top of the sliding table, and the hollow push rod slides through the inner part of the rotating disc The outer wall, one end of the hollow push rod away from the connecting piece is fixedly installed on a side of the second splint away from the first splint, the sliding rod is slidably installed on the inner wall of the hollow push rod, the sliding rod slides through the inner and outer walls of the second splint, the transmission block is fixedly installed on the top of the sliding rod, the fixed round rod is fixedly installed on a side of the rotating disc close to the fixed disc, the limit block is rotatably installed on the surface of the fixed round rod, and a limiting hole is provided on the top of the hollow push rod. The transmission block will contact the limit block when it moves, and the movement of the transmission block will drive the limit block to rotate. The rotation of the limit block will be stuck in the limiting hole, so that after the control arm is clamped, the limit hole will limit the limit block, making it impossible to continue to push the hollow push rod manually.

[0007] According to the above technical solution, a spring No. 1 is arranged between the first and second splints, and the end of the sliding rod away from the support frame contacts the first splint, and the second splint is reset by the spring No. 1.

[0008] According to the above technical solution, a No. 1 torsion spring is arranged between the fixed round rod and the limit block, the limit block is in contact with the limit hole, and the limit block is reset by the No. 1 torsion spring.

[0009] According to the above technical solution, the rotating device includes: a rotating motor, a transmission column, a long rod, a rotating block, an arc rod, a baffle plate 1, a baffle plate 2 and a sliding plate. The rotating motor is fixedly mounted on a side of the fixed disc away from the rotating disc, the output end of the rotating motor rotates and penetrates the inner and outer walls of the fixed disc, the output end of the rotating motor is fixedly mounted on a side of the rotating disc close to the fixed disc, the rotating motor is electrically connected to the control button, the transmission column is fixedly mounted on a side of the rotating disc away from the sliding platform, the long rod slides through the inner and outer walls of the support frame and the observation door, the rotating block is rotatably mounted on The end of the long rod is away from the observation door, and a No. 2 torsion spring is arranged between the long rod and the rotating block. The arc rod is rotatably installed on the surface of the observation door, the baffle plate 1 is fixedly installed on the top of the long rod, the baffle plate 2 is fixedly installed on the top of the long rod, and the sliding plate is fixedly installed on the bottom of the long rod. When the rotation speed of the transmission column is too fast, the kinetic energy generated by the transmission column is greater than the elastic coefficient of the No. 2 torsion spring, and the rotation of the transmission column will push the rotating block to rotate. At the end of welding, as the rotation speed of the transmission column decreases, the kinetic energy generated by the transmission column is less than the elastic coefficient of the No. 2 torsion spring, and the rotating block will prevent the transmission column from continuing to rotate.

[0010] According to the above technical solution, the transmission column is in contact with the rotating block, and a No. 3 torsion spring is arranged between the arc rod and the observation door, and the arc rod is driven to reset by the No. 3 torsion spring.

[0011] According to the above technical solution, the protective device includes: a fixed slider, a long sliding rod, a connecting plate, a protective door, a lock box, a lock tongue and a U-shaped rod. The fixed slider is fixedly installed on the top of the operating table, the long sliding rod is slidably installed on the inner wall of the fixed slider, the connecting plate is fixedly installed on the surface of the long sliding rod, the protective door is rotatably installed between the operating table and the top cover, the lock box is fixedly installed on a side of the protective door close to the long sliding rod, the lock tongue slides through the inner wall of the lock box, and the U-shaped rod is slidably installed on a side of another protective door close to the long sliding rod. The movement of the long sliding rod will contact the lock tongue, the movement of the long sliding rod will push the lock tongue to move, and the lock tongue will move to the inside of the U-shaped rod, so that the lock tongue is limited by the U-shaped rod, and the protective door cannot be pulled outward.

[0012] According to the above technical solution, the protective device also includes: a sleeve rod, a handle, a reset plate and a vertical plate. A circular hole is opened on the surface of the protective door. The sleeve rod is sleeved on the inner wall of the circular hole. The handle is fixedly installed at one end of the sleeve rod, the reset plate is fixedly installed at the other end of the sleeve rod, and the vertical plate is fixedly installed on the top of the U-shaped rod. The rotation of the reset plate will drive the vertical plate to move away from the lock tongue. The movement of the vertical plate will drive the U-shaped rod to move away from the lock tongue. After the U-shaped rod moves, the lock tongue is no longer limited, so that the protective door can be opened normally.

[0013] According to the above technical solution, a No. 3 spring is arranged between the lock tongue and the lock box, and a No. 2 spring is arranged between the connecting plate and the fixed slider. The lock tongue is reset by the No. 3 spring, and the fixed slider is reset by the No. 2 spring.

[0014] The present invention provides a welding clamping device for an automobile control arm, which has the following beneficial effects: (1) The invention clamps the control arm by a clamping plate to prevent the control arm from shifting during welding and causing welding failure, thereby reducing the defective rate during processing and improving work efficiency. The limit block rotates and is stuck in the limit hole, so that after the control arm is clamped, the limit hole will limit the limit block, making it impossible for the hollow push rod to be pushed further manually, thereby preventing the control arm from being over-clamped. When the control arm is welded, over-clamping will cause thermal deformation of the control arm, resulting in processing failure, ensuring the production qualification rate and improving the stability of production efficiency.

[0015] (2) The invention controls the welding device to weld the control arm by moving the joystick, so that welding can be performed while the control arm is rotating, which has higher welding accuracy and stronger practicality. After the welding is completed, when the output end of the rotating motor gradually stops rotating, the front of the clamping device is ensured to face the top, preventing the clamping device from being placed vertically after it stops rotating, thereby affecting the disassembly of the control arm and facilitating the clamping of the control arm again for the next welding, thereby improving the stability and practicality of the device operation.

[0016] (3) In this invention, the lock tongue is limited by the U-shaped rod, so that the protective door cannot be pulled outward, so that the protective door is in a closed state and cannot be opened when the control arm is welding, thereby preventing the staff from accidentally opening the protective door and causing injuries to the staff due to splashing of welding slag generated during welding. This ensures the working environment of the staff and improves the protection of the staff. After the U-shaped rod moves, the lock tongue is no longer limited, so that the protective door can be opened normally. In special circumstances or when the protective door needs to be opened during welding, the protective door can be opened through the device, thereby improving the practicality of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the internal structure of the housing of the present invention; Figure 3 This is a schematic diagram of the position relationship structure of the support frame of the present invention; Figure 4 It is a schematic diagram of the position relationship structure of the rotating motor of the present invention; Figure 5 It is a schematic diagram of the structure of the clamping device of the present invention; Figure 6This is a schematic diagram of the cross-sectional structure of the hollow push rod of the present invention; Figure 7 It is a schematic diagram of the structure of the protective device of the present invention; Figure 8 It is a schematic structural diagram of the position relationship between the vertical plate and the U-shaped rod of the present invention.

[0018] In the figure: 1, operating table; 2, universal wheel; 3, shell; 4, top cover; 5, observation door; 6, base; 7, joystick 1; 8, joystick 2; 9, control button; 10, welding device; 111, support frame; 112, connecting piece; 113, fixed disc; 114, rotating disc; 115, sliding table; 116, clamping plate 1; 117, clamping plate 2; 118, spring No. 1; 119, hollow push rod; 1110, sliding rod; 1111, transmission block; 1112, fixed round rod; 1113, limit block; 121, rotating motor; 122, transmission column; 123, long rod; 124, rotating block; 125, arc rod; 126, baffle one; 127, baffle two; 128, sliding plate; 131, fixed slider; 132, sliding long rod; 133, connecting plate; 134, spring No. 2; 135, protective door; 136, lock box; 137, lock tongue; 138, sleeve rod; 139, handle; 1310, reset plate; 1311, U-shaped rod; 1312, vertical plate. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0020] See also Figure 1-Figure 6 One embodiment of the present invention is: a welding clamping device for a vehicle control arm, comprising an operating platform 1, a universal wheel 2 is rotatably mounted at the bottom of the operating platform 1, a housing 3 is fixedly mounted on the top of the operating platform 1, an observation door 5 is fixedly mounted on the top of the operating platform 1, a top cover 4 is fixedly mounted on the top of the housing 3 and the observation door 5, a base 6 is fixedly mounted on the front of the operating platform 1, a joystick 1 7 is arranged on the top of the base 6, a joystick 2 8 is arranged on the top of the base 6, a control button 9 is arranged on the top of the base 6, a welding device 10 is arranged at the bottom of the top cover 4, the welding device 10 is electrically connected to the joystick 1 7, and a clamping device is arranged on the top of the operating platform 1; The clamping device includes: a support frame 111, a connecting member 112, a fixed disc 113, a rotating disc 114, a sliding table 115, a clamping plate 116, a clamping plate 2 117, a hollow push rod 119, a sliding rod 1110, a transmission block 1111, a fixed round rod 1112 and a limit block 1113. The support frame 111 is fixedly installed on the top of the operating table 1, the connecting member 112 is fixedly installed on a side of the support frame 111 close to the shell 3, the fixed disc 113 is fixedly installed on an end of the connecting member 112 away from the support frame 111, the rotating disc 114 is rotatably installed on a side of the fixed disc 113 away from the connecting member 112, the sliding table 115 is fixedly installed on a side of the rotating disc 114 away from the fixed disc 113, the clamping plate 116 is slidably installed on the top of the sliding table 115, and the clamping plate 2 117 is slidably installed on the top of the sliding table 115 to prevent the control arm from shifting its position during welding and causing welding. The connection failure is prevented, the defective rate during processing is reduced, and the work efficiency is improved. The hollow push rod 119 slides through the inner and outer walls of the rotating disk 114, and the end of the hollow push rod 119 away from the connecting piece 112 is fixedly installed on the side of the second clamping plate 117 away from the first clamping plate 116. The sliding rod 1110 is slidably installed on the inner wall of the hollow push rod 119, and the sliding rod 1110 slides through the inner and outer walls of the second clamping plate 117. The transmission block 1111 is fixedly installed on the top of the sliding rod 1110, and the fixed round rod 1112 is fixedly installed on the side of the rotating disk 114 close to the fixed round disk 113. The limit block 1113 is rotatably installed on the surface of the fixed round rod 1112. A limit hole is provided on the top of the hollow push rod 119 to prevent excessive clamping of the control arm, which will cause thermal deformation of the control arm during welding, resulting in processing failure, ensuring the qualified rate of production and improving the stability of production efficiency.

[0021] A spring 118 is provided between the first clamping plate 116 and the second clamping plate 117 . The end of the sliding rod 1110 away from the support frame 111 contacts the first clamping plate 116 , and the spring 118 drives the second clamping plate 117 to reset.

[0022] A torsion spring No. 1 is arranged between the fixed round rod 1112 and the limit block 1113. The limit block 1113 is in contact with the limit hole, and the limit block 1113 is driven to reset by the torsion spring No. 1.

[0023] When this embodiment is working: the control arm is placed on the top of the sliding table 115, and then the hollow push rod 119 is pushed. The movement of the hollow push rod 119 in the direction of the control arm will drive the second clamp 117 to move. The movement of the second clamp 117 will drive the No. 1 spring 118 to move. The movement of the No. 1 spring 118 will drive the first clamp 116 to move in the direction of the control arm. The movement of the first clamp 116 will contact the control arm. After the first clamp 116 contacts the control arm, the first clamp 116 will clamp the control arm to prevent the control arm from shifting during welding and causing welding failure, thereby reducing the defective rate during processing and improving work efficiency. After the first clamp 116 contacts the control arm, the second clamp 117 continues to move in the direction of the first clamp 116. The movement of the second clamp 117 will drive the sliding rod 1110 to move in the direction of the first clamp 116. The sliding rod The movement of 1110 will contact the first clamping plate 116. As the hollow push rod 119 continues to push, the sliding rod 1110 is blocked by the first clamping plate 116 and will slide inside the hollow push rod 119 in the direction away from the second clamping plate 117. The movement of the sliding rod 1110 will drive the transmission block 1111 to move. The movement of the transmission block 1111 will contact the limit block 1113. The movement of the transmission block 1111 will drive the limit block 1113 to rotate. The rotation of the limit block 1113 will be stuck in the limit hole, so that after the control arm is clamped, the limit hole will limit the limit block 1113, making it impossible for humans to continue to push the hollow push rod 119, thereby preventing the control arm from being over-clamped. When the control arm is welded, excessive clamping will cause thermal deformation of the control arm, resulting in processing failure, thereby ensuring the production qualification rate and improving the stability of production efficiency.

[0024] See also Figure 1-Figure 8On the basis of the above embodiment, in another embodiment of the present invention, a rotating device and a protective device are arranged on the top of the operating platform 1, wherein the rotating device comprises: a rotating motor 121, a transmission column 122, a long rod 123, a rotating block 124, an arc rod 125, a baffle 126, a baffle 2 127 and a sliding plate 128, the rotating motor 121 is fixedly mounted on a side of the fixed disc 113 away from the rotating disc 114, the output end of the rotating motor 121 rotates and penetrates the inner and outer walls of the fixed disc 113, the output end of the rotating motor 121 is fixedly mounted on a side of the rotating disc 114 close to the fixed disc 113, the rotating motor 121 is electrically connected to the control button 9, so that welding is performed when the control arm rotates, the welding accuracy is higher, the practicability is strong, the transmission column 12 2 is fixedly installed on the side of the rotating disc 114 away from the sliding table 115, the long rod 123 slides through the inner and outer walls of the support frame 111 and the observation door 5, the rotating block 124 is rotatably installed on the end of the long rod 123 away from the observation door 5, a second torsion spring is arranged between the long rod 123 and the rotating block 124, the arc rod 125 is rotatably installed on the surface of the observation door 5, the baffle 126 is fixedly installed on the top of the long rod 123, the baffle 2 127 is fixedly installed on the top of the long rod 123, and the sliding plate 128 is fixedly installed on the bottom of the long rod 123, so as to ensure that the front of the clamping device faces the top, prevent the clamping device from being placed vertically after stopping rotation, so that the disassembly of the control arm is affected, and it is convenient to clamp the control arm again in the next welding, thereby improving the stability and practicality of the device operation.

[0025] The transmission column 122 is in contact with the rotating block 124, and a third torsion spring is arranged between the arc rod 125 and the observation door 5, and the arc rod 125 is driven to reset by the third torsion spring.

[0026] The protective device includes: a fixed slider 131, a sliding long rod 132, a connecting plate 133, a protective door 135, a lock box 136, a lock tongue 137 and a U-shaped rod 1311. The fixed slider 131 is fixedly installed on the top of the operating table 1, the sliding long rod 132 is slidably installed on the inner wall of the fixed slider 131, the connecting plate 133 is fixedly installed on the surface of the sliding long rod 132, the protective door 135 is rotatably installed between the operating table 1 and the top cover 4, the lock box 136 is fixedly installed on a side of the protective door 135 close to the sliding long rod 132, the lock tongue 137 slides through the inner wall of the lock box 136, and the U-shaped rod 1311 is slidably installed on a side of another protective door 135 close to the sliding long rod 132, so that the protective door 135 is in a closed state and cannot be opened when the control arm is welding, so as to prevent the staff from accidentally touching and opening the protective door 135, resulting in the splashing of welding slag generated during welding and causing harm to the staff, thereby ensuring the working environment of the staff and improving the protection of the staff.

[0027] The protective device also includes: a sleeve rod 138, a handle 139, a reset plate 1310 and a vertical plate 1312. A circular hole is opened on the surface of the protective door 135. The sleeve rod 138 is sleeved on the inner wall of the circular hole. The handle 139 is fixedly installed at one end of the sleeve rod 138, the reset plate 1310 is fixedly installed at the other end of the sleeve rod 138, and the vertical plate 1312 is fixedly installed on the top of the U-shaped rod 1311. When special circumstances occur or the protective door 135 needs to be opened during welding, the protective door 135 can be opened through the device, thereby improving the practicality of the device.

[0028] A No. 3 spring is arranged between the lock tongue 137 and the lock box 136, and a No. 2 spring 134 is arranged between the connecting plate 133 and the fixed slider 131. The No. 3 spring drives the lock tongue 137 to reset, and the No. 2 spring 137 drives the fixed slider 131 to reset.

[0029] When the present embodiment is working, after the control arm completes clamping, the control button 9 is pressed, and the control button 9 starts the rotating motor 121. The rotation of the output end of the rotating motor 121 drives the rotating disk 114 to rotate. The rotation of the rotating disk 114 drives the sliding table 115 to rotate. The rotation of the sliding table 115 drives the clamping plate 116 and the clamping plate 2 117 to rotate. The rotation of the clamping plate 2 117 drives the control arm to rotate. The moving joystick 17 controls the welding device 10 to weld the control arm, so that welding is performed when the control arm rotates, and the welding accuracy is higher and the practicality is strong. The arc rod 125 is manually rotated. After the arc rod 125 rotates, it no longer contacts with the baffle 1 126. When the arc rod 125 no longer contacts the baffle 1 126, the arc rod 125 releases the limit on the baffle 1 126, and then pushes the long rod 123. The movement of the long rod 123 drives the baffle 2 127 to move. Then, the arc rod 125 is driven to reset by the No. 3 torsion spring. After the arc rod 125 is reset The rotation of the transmission column 122 will push the rotating block 124 to rotate. At the end of welding, as the rotation speed of the transmission column 122 decreases, the kinetic energy generated by the transmission column 122 is less than the elastic coefficient of the second torsion spring, and the rotating block 124 will prevent the transmission column 122 from continuing to rotate, so that after the welding is completed, the output end of the rotating motor 121 gradually stops rotating, ensuring that the front of the clamping device faces the top, preventing the clamping device from being placed vertically after stopping rotating, so that the disassembly of the control arm is affected, and it is convenient to clamp the control arm again for the next welding, thereby improving the stability and practicality of the device operation.

[0030] When the protective door 135 is manually pushed, the rotation of the protective door 135 will drive the lock box 136 to rotate, and the rotation of the lock box 136 will drive the lock tongue 137 to rotate. When the long rod 123 moves in the direction away from the rotating disk 114, the movement of the long rod 123 will drive the sliding plate 128 to move, and the movement of the sliding plate 128 will contact the sliding long rod 132. The movement of the sliding plate 128 will push the sliding long rod 132 to move in the direction of the protective door 135, and the movement of the sliding long rod 132 will contact the lock tongue 137. The movement of the sliding long rod 132 will push the lock tongue 137 to move, and the movement of the lock tongue 137 will move to the inside of the U-shaped rod 1311, so that the lock tongue 137 is limited by the U-shaped rod 1311, and the protective door 135 cannot be pulled outward, so that the protective door 135 is in a closed state and cannot be opened when the control arm is welding, so as to prevent the staff from accidentally touching and opening the protective door 135, resulting in the splashing of welding slag generated during welding and causing injury to the staff. , which ensures the working environment of the staff and improves the protection of the staff. The handle 139 is manually pushed, and the movement of the handle 139 will drive the sleeve rod 138 to move. The movement of the sleeve rod 138 will drive the reset plate 1310 to move in the direction of the vertical plate 1312. Then, the handle 139 is turned, and the rotation of the handle 139 will drive the sleeve rod 138 to rotate. The rotation of the sleeve rod 138 will drive the reset plate 1310 to rotate. The reset plate 1310 rotates and contacts the vertical plate 1312. The rotation of the reset plate 1310 will drive the vertical plate 1312 to move away from the lock tongue 137. The movement of the vertical plate 1312 will drive the U-shaped rod 1311 to move away from the lock tongue 137. After the U-shaped rod 1311 moves, the lock tongue 137 is no longer limited, so that the protective door 135 can be opened normally. In special circumstances or when the protective door 135 needs to be opened during welding, the protective door 135 can be opened by the device, thereby improving the practicality of the device.

[0031] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A welding clamping device for an automobile control arm, comprising an operating table (1), characterized in that: A universal wheel (2) is rotatably mounted on the bottom of the operating platform (1); a housing (3) is fixedly mounted on the top of the operating platform (1); an observation door (5) is fixedly mounted on the top of the operating platform (1); a top cover (4) is fixedly mounted between the housing (3) and the top of the observation door (5); a base (6) is fixedly mounted on the front of the operating platform (1); a joystick 1 (7) is arranged on the top of the base (6); a joystick 2 (8) is arranged on the top of the base (6); a control button (9) is arranged on the top of the base (6); a welding device (10) is arranged on the bottom of the top cover (4); the welding device (10) is electrically connected to the joystick 1 (7); and a clamping device, a rotating device and a protective device are arranged on the top of the operating platform (1); The clamping device comprises: a support frame (111), a connecting member (112), a fixed disc (113), a rotating disc (114), a sliding table (115), a clamping plate (116), a clamping plate (117), a hollow push rod (119), a sliding rod (1110), a transmission block (1111), a fixed round rod (1112) and a limit block (1113), wherein the support frame (111) is fixedly mounted on the top of the operating table (1), the connecting member (112) is fixedly mounted on a side of the support frame (111) close to the housing (3), the fixed disc (113) is fixedly mounted on an end of the connecting member (112) away from the support frame (111), the rotating disc (114) is rotatably mounted on a side of the fixed disc (113) away from the connecting member (112), the sliding table (115) is fixedly mounted on a side of the rotating disc (114) away from the fixed disc (113), and the clamping plate (119) is fixedly mounted on a side of the rotating disc (114) away from the fixed disc (113). (116) is slidably mounted on the top of the sliding platform (115), the second clamping plate (117) is slidably mounted on the top of the sliding platform (115), the hollow push rod (119) slides through the inner and outer walls of the rotating disk (114), one end of the hollow push rod (119) away from the connecting member (112) is fixedly mounted on a side of the second clamping plate (117) away from the first clamping plate (116), and the sliding rod (1110) is slidably mounted on the hollow push rod (119) ), the sliding rod (1110) slides through the inner and outer walls of the second clamping plate (117), the transmission block (1111) is fixedly mounted on the top of the sliding rod (1110), the fixed round rod (1112) is fixedly mounted on a side of the rotating disc (114) close to the fixed round disc (113), the limit block (1113) is rotatably mounted on the surface of the fixed round rod (1112), and a limit hole is provided on the top of the hollow push rod (119).

2. The welding clamping device for an automobile control arm according to claim 1, characterized in that: A spring (118) is provided between the first clamping plate (116) and the second clamping plate (117), and one end of the sliding rod (1110) away from the support frame (111) is in contact with the first clamping plate (116).

3. The welding clamping device for an automobile control arm according to claim 2, characterized in that: A torsion spring is provided between the fixed round rod (1112) and the limiting block (1113), and the limiting block (1113) is in contact with the limiting hole.

4. The welding clamping device for an automobile control arm according to claim 3, characterized in that: The rotating device comprises: a rotating motor (121), a transmission column (122), a long rod (123), a rotating block (124), an arc-shaped rod (125), a baffle plate 1 (126), a baffle plate 2 (127) and a sliding plate (128); the rotating motor (121) is fixedly mounted on a side of the fixed disk (113) away from the rotating disk (114); the output end of the rotating motor (121) rotates and penetrates the inner and outer walls of the fixed disk (113); the output end of the rotating motor (121) is fixedly mounted on a side of the rotating disk (114) close to the fixed disk (113); the rotating motor (121) is electrically connected to the control button (9); the transmission column (125) is fixedly mounted on a side of the rotating disk (114) close to the fixed disk (113); 22) is fixedly mounted on a side of the rotating disc (114) away from the sliding platform (115), the long rod (123) slides through the inner and outer walls of the support frame (111) and the observation door (5), the rotating block (124) is rotatably mounted on an end of the long rod (123) away from the observation door (5), a second torsion spring is provided between the long rod (123) and the rotating block (124), the arc rod (125) is rotatably mounted on the surface of the observation door (5), the baffle plate 1 (126) is fixedly mounted on the top of the long rod (123), the baffle plate 2 (127) is fixedly mounted on the top of the long rod (123), and the sliding plate (128) is fixedly mounted on the bottom of the long rod (123).

5. The welding clamping device for an automobile control arm according to claim 4, characterized in that: The transmission column (122) is in contact with the rotating block (124), and a third torsion spring is provided between the arc-shaped rod (125) and the observation door (5).

6. The welding clamping device for an automobile control arm according to claim 5, characterized in that: The protective device comprises: a fixed slider (131), a long sliding rod (132), a connecting plate (133), a protective door (135), a lock box (136), a lock tongue (137) and a U-shaped rod (1311), wherein the fixed slider (131) is fixedly mounted on the top of the operating table (1), the long sliding rod (132) is slidably mounted on the inner wall of the fixed slider (131), the connecting plate (133) is fixedly mounted on the surface of the long sliding rod (132), the protective door (135) is rotatably mounted between the operating table (1) and the top cover (4), the lock box (136) is fixedly mounted on a side of the protective door (135) close to the long sliding rod (132), the lock tongue (137) slidably penetrates the inner wall of the lock box (136), and the U-shaped rod (1311) is slidably mounted on a side of another protective door (135) close to the long sliding rod (132).

7. The welding clamping device for an automobile control arm according to claim 6, characterized in that: The protective device further comprises: a sleeve rod (138), a handle (139), a reset plate (1310) and a vertical plate (1312); a circular hole is opened on the surface of the protective door (135); the sleeve rod (138) is sleeved on the inner wall of the circular hole; the handle (139) is fixedly mounted on one end of the sleeve rod (138); the reset plate (1310) is fixedly mounted on the other end of the sleeve rod (138); and the vertical plate (1312) is fixedly mounted on the top of the U-shaped rod (1311).

8. The welding clamping device for an automobile control arm according to claim 7, characterized in that: A No. 3 spring is provided between the lock tongue (137) and the lock box (136), and a No. 2 spring (134) is provided between the connecting plate (133) and the fixed slide block (131).

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