Positioning mechanism for automobile part machining and welding

Abstract

The invention relates to the field of automobile welding, and discloses a positioning mechanism for automobile part machining and welding, which comprises a base, two first clamping pieces are arranged on the base, automobile exhaust pipes are arranged on the first clamping pieces, and a clamping device is fixedly mounted on the base on one side far away from the first clamping pieces; the adjusting part in the clamping device adapts to the clamping position, and the second clamping part and the centering clamping part are both mounted on the adjusting part, so that when a workpiece is welded, the problem that the circle center of the second clamping part and the circle center of the centering clamping part deviate due to vibration and high temperature generated by welding is solved, the welding precision is improved, and the welding quality is improved. An internal extrusion part is arranged on the centering clamping part, the limiting transmission part is started to drive the internal extrusion part to move, the internal extrusion part can jack up the inner wall of the automobile exhaust pipe, and the problem that when the second clamping part clamps the outer wall of the automobile exhaust pipe, the automobile exhaust pipe deforms is prevented; and the protection effect on the automobile exhaust pipe during clamping and welding is improved.

Description

Technical Field

[0001] This invention relates to the field of automotive welding technology, and more specifically, to a positioning mechanism for welding automotive parts. Background Technology

[0002] Positioning mechanisms for welding automotive parts are key tooling fixtures that ensure welding accuracy and efficiency. They achieve precise fixing and alignment of parts through high-rigidity clamps and adjustable positioning modules, and are suitable for workpieces of various sizes. Their compact structure and simple operation reduce human error and improve welding consistency. They are widely used in automated welding production lines for components such as car bodies and chassis, ensuring product quality and production efficiency. Patent CN106736224B discloses a quick positioning welding fixture for automotive exhaust pipes, including a base with a dovetail groove, a support frame inserted into the dovetail groove, the support frame including an outer plate and an inner liner, the inner walls of the outer plate being symmetrically provided with limit pins on both sides, the inner liner being movably connected to the limit pins, the support frame including a first support frame, a second support frame, a third support frame, and a fourth support frame, the first support frame and the third support frame being respectively provided with locking mechanisms, the locking mechanisms including a push-pull quick clamp and a positioning block, the moving rod of the push-pull quick clamp being connected to the positioning block, the positioning block being provided with a positioning pin, the second support frame being provided with a clamp, and the straight pipe being locked by the clamp.

[0003] While the aforementioned device can clamp straight pipes during use, it is not suitable for use with curved exhaust pipes of varying sizes. When welding exhaust pipes to connectors on automobiles, the exhaust pipe and connectors must be clamped together. During clamping, the surface of the exhaust pipe is prone to wear and deformation, which is even more likely to occur during welding. Furthermore, the clamping position is prone to deformation due to high temperatures during welding, which may cause deviations in the center position of the weld, resulting in poor precision. Summary of the Invention

[0004] This invention provides a positioning mechanism for welding automotive parts, solving the technical problems of curved exhaust pipes of different sizes in related technologies. When welding exhaust pipes to connecting parts on a car, the exhaust pipe and the connecting parts need to be clamped together. However, the surface of the exhaust pipe is prone to wear and deformation during clamping, and this situation is more likely to occur during welding. Furthermore, the clamping position is prone to deformation due to high temperature during welding, which may cause deviation in the center position of the weld and result in poor accuracy.

[0005] This invention provides a positioning mechanism for welding automotive parts, including a base. Symmetrically arranged slide rails are fixedly mounted on the top of the base, and a bottom support column is fixedly mounted on the bottom of the base. A support frame is threaded onto the internal threads of the slide rails, and a welding machine is fixedly mounted at the center of the support frame. Two first clamping members are provided on the base, each with an automotive exhaust pipe mounted on it. A clamping device is fixedly mounted on the base on the side away from the first clamping members. The clamping device is used to clamp and limit the welding portion of the part. The clamping device includes a second clamping member, a centering clamping member, an adjusting member, an internal pressing member, and a limiting transmission member. An adjusting member is fixedly installed on the top of the base on one side of the first clamping member. A second clamping member is fixedly installed on the top of the adjusting member. A centering clamping member is fixedly installed on the side of the adjusting member. A limit transmission member is provided on the side of the centering clamping member away from the second clamping member. An internal extrusion member is installed on the internal thread of the centering clamping member. The second clamping member is used to clamp the exterior of the automobile exhaust pipe. A pipe connecting block is provided at the center of the centering clamping member. The welding machine welds the automobile exhaust pipe to the pipe connecting block. The centering clamping member is used to clamp the pipe connecting block. The internal extrusion member is used to support the inner wall of the automobile exhaust pipe.

[0006] As a further optimization of the present invention, the adjusting member includes a first telescopic rod fixedly installed on the base on the side away from the first clamping member, a spherical shell fixedly installed on the top of the first telescopic rod, a sphere movably installed inside the spherical shell, a second support block fixedly installed on the outside of the sphere, a second clamping member provided on the top of the second support block, a second telescopic rod fixedly installed on the side of the second support block, and a centering clamping member fixedly installed at the end of the second telescopic rod.

[0007] As a further optimization of the present invention, the centering clamping member includes a bottom mounting block fixedly installed at the end of the second telescopic rod, a square limiting block fixedly installed at the top of the bottom mounting block, a clamping wall slidably installed on the square limiting block, a first sliding column fixedly installed at the end of the clamping wall, a first rotating block slidably installed inside the square limiting block, a rotating groove arrayed on the inner circumference of the first rotating block, the first sliding column sliding inside the rotating groove, a top fixing block fixedly installed at the top of the square limiting block, a central groove provided at the center of the first rotating block, the central groove being used to allow the internal extrusion member to pass through, and the top fixing block being connected to the limiting transmission member.

[0008] As a further optimization of the present invention, a third clamping member is fixedly installed on the side of the first rotating block. The third clamping member includes a first gear fixedly installed on the side of the first rotating block. A limit isolation plate is fixedly installed on the first gear. A second tooth is fixedly installed on the inner wall of the first gear. A first tooth is fixedly installed on the outer wall of the first gear. The first gear meshes with the limit transmission member.

[0009] As a further optimization of the present invention, the limiting transmission component includes a first pull block fixedly installed at the end of the top fixed block, a telescopic power block fixedly installed at the bottom of the first pull block, a first lifting block slidably installed inside the telescopic power block, a first motor rotatably installed at the lower part of the first lifting block, a fifth gear and a lifting column symmetrically installed on the first motor, the lifting column meshing with the second gear teeth, the fifth gear meshing with the internal pressing component, and a third telescopic rod fixedly installed on the side of the first lifting block.

[0010] As a further optimization of the present invention, the limiting transmission component includes a spring protection block fixedly installed on the top of the first lifting block, and a limiting transmission block is slidably installed on the outside of the spring protection block, the limiting transmission block being used to limit the first tooth.

[0011] As a further optimization of the present invention, the internal extrusion component includes a rotating gear rotatably mounted on a limiting isolation plate. A second threaded rod is internally threaded onto the rotating gear. An extrusion threaded rod is slidably mounted inside the second threaded rod. An extrusion rotating plate is fixedly mounted at the end of the second threaded rod near the second clamping component. A second extrusion rod is rotatably mounted inside the extrusion rotating plate. A first extrusion rod is rotatably mounted at the end of the second extrusion rod. A third limiting plate is rotatably mounted at the end of the first extrusion rod. The third limiting plate is fixedly mounted at the end of the extrusion threaded rod. An internal moving component is slidably mounted outside the second threaded rod. The internal moving component is used to drive the extrusion threaded rod to slide inside the second threaded rod. A protrusion is provided inside the first rotating block to limit the movement of the second threaded rod.

[0012] As a further optimization of the present invention, the internal moving part includes a limiting gear plate slidably mounted on the outside of the second threaded rod. A first spring is fixedly mounted on the side of the limiting gear plate, and a spring limiting plate is fixedly mounted on the end of the first spring. A fourth gear is rotatably mounted on the side of the spring limiting plate. The fourth gear is threadedly connected to the extrusion threaded rod and meshes with the fifth gear.

[0013] As a further optimization of the present invention, the center of the rotating gear, the center of the limiting isolation plate, and the center of the central groove are on the same straight line.

[0014] As a further optimization of the present invention, the diameter of the third limiting plate is the same as the diameter of the second threaded rod.

[0015] The beneficial effects of this invention are as follows: The positioning mechanism for welding automotive parts described in this invention adapts to the clamping position through an adjusting component inside the clamping device. Both the second clamping component and the centering clamping component are mounted on the adjusting component, preventing the center of the second clamping component and the centering clamping component from deviating due to vibration and high temperatures generated during welding, thereby improving welding accuracy. The centering clamping component is equipped with an internal pressing component. When the limiting transmission component is activated, the internal pressing component moves, causing it to lift the inner wall of the automotive exhaust pipe. This prevents deformation of the automotive exhaust pipe when the second clamping component clamps the outer wall of the automotive exhaust pipe, thus improving the protection of the automotive exhaust pipe during clamping and welding. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall shape of the device of the present invention; Figure 2 This is a schematic diagram of the overall device installation of the present invention; Figure 3 This is a schematic diagram of the internal structure of the overall device of the present invention; Figure 4 This is a schematic diagram of the internal structure of the clamping device of the present invention; Figure 5 This is a schematic diagram of the internal structure of the centering clamping component of the present invention; Figure 6 This is a schematic diagram of the internal structure of the third clamping member of the present invention; Figure 7 This is a schematic diagram of the internal structure of the limiting transmission component of the present invention; Figure 8 This is a schematic diagram of the internal structure of the internal extrusion member and the internal moving member of the present invention.

[0017] In the picture: 1. Base; 11. Slide rail; 12. First clamping component; 13. Automobile exhaust pipe; 14. Support frame; 15. Welding machine; 16. Bottom support column; 17. Pipe connection block; 2. Clamping device; 21. Second clamping component; 22. Centering clamping component; 221. Bottom mounting block; 222. Square limiting block; 223. Clamping wall; 224. First sliding column; 225. First rotating block; 226. Rotating groove; 227. Central groove; 228. Top fixing block; 23. Adjusting component; 231. First telescopic rod; 232. Spherical shell; 233. Sphere; 234. Second support block; 235. Second telescopic rod; 24. Third clamping component; 241. First gear; 242. First tooth; 243. Second tooth; 244. Limiting isolation plate; 25. Internal extrusion component; 251. Three limiting plates; 252, first extrusion rod; 253, second extrusion rod; 254, extrusion rotating plate; 255, rotating gear; 256, extrusion threaded rod; 257, second threaded rod; 258, internal moving part; 2581, limiting gear plate; 2582, first spring; 2583, spring limiting plate; 2584, fourth gear; 26, limiting transmission part; 261, first pull block; 262, first lifting block; 263, lifting column; 264, fifth gear; 265, first motor; 266, third telescopic rod; 267, telescopic power block; 268, limiting transmission block; 269, spring protection block. Detailed Implementation

[0018] The subject matter described herein will now be discussed with reference to exemplary embodiments. It should be understood that these embodiments are discussed only to enable those skilled in the art to better understand and implement the subject matter described herein, and changes may be made to the function and arrangement of the elements discussed without departing from the scope of this specification. Various processes or components may be omitted, substituted, or added as needed in the examples. Furthermore, features described in some examples may be combined in other examples.

[0019] like Figures 1 to 3 As shown in the embodiment of the present invention, a positioning mechanism for welding automotive parts includes a base 1. A symmetrically arranged slide rail 11 is fixedly installed on the top of the base 1, and a bottom support column 16 is fixedly installed on the bottom of the base 1. A support frame 14 is installed on the internal thread of the slide rail 11. A welding machine 15 is fixedly installed at the center of the support frame 14. Two first clamping members 12 are provided on the base 1. An automotive exhaust pipe 13 is provided on the first clamping member 12. A clamping device 2 is fixedly installed on the base 1 on the side away from the first clamping member 12. The clamping device 2 is used to clamp and limit the welding part of the part. like Figures 4 to 8As shown, the clamping device 2 includes a second clamping member 21, a centering clamping member 22, an adjusting member 23, an internal pressing member 25, and a limiting transmission member 26. The adjusting member 23 is fixedly installed on the top of the base 1 on the side away from the first clamping member 12. The second clamping member 21 is fixedly installed on the top of the adjusting member 23. The centering clamping member 22 is fixedly installed on the side of the adjusting member 23. The limiting transmission member 26 is provided on the side of the centering clamping member 22 on the side away from the second clamping member 21. The internal pressing member 25 is installed on the internal thread of the centering clamping member 22. The second clamping member 21 is used to clamp the exterior of the automobile exhaust pipe 13. A pipe connecting block 17 is provided at the center of the centering clamping member 22. The welding machine 15 welds the automobile exhaust pipe 13 and the pipe connecting block 17. The centering clamping member 22 is used to clamp the pipe connecting block 17. The internal pressing member 25 is used to support the inner wall of the automobile exhaust pipe 13.

[0020] It should be noted that when welding automotive exhaust pipes, two types of clamps are generally used for clamping. Therefore, during clamping, temperature and movement can easily cause clamping vibration, resulting in relative displacement of the two clamps. This leads to deviation during use, which in turn causes uneven force on the exhaust pipe 13 and pipe connecting block 17 when the exhaust pipe is installed on the vehicle, as well as incompatibility at the interface. The following improvements have been made to solve this problem. First, the car exhaust pipe 13 is placed on the first clamping member 12. The motor drives the first clamping member 12 to clamp the car exhaust pipe 13. Then, the adjusting member 23 is adjusted to clamp the car exhaust pipe 13. Next, the pipe connecting block 17 is placed on the centering clamping member 22 for clamping. Since the exhaust pipe of the car component is hollow, excessive force cannot be applied during clamping, as this may cause deformation. Conversely, insufficient clamping force may lead to instability during welding. To address this issue, an internal pressing member 25 is provided on the centering clamping member 22, and a limiting transmission member 26 is provided on the side of the centering clamping member 22. After the second clamping member 21 clamps the welding position of the car exhaust pipe 13, the motor drives the limiting transmission member 26 to rotate, thereby causing the centering clamping member 22 to... The pipe connection block 17 is clamped, and the position of the internal extrusion member 25 can be adjusted by continuing to rotate it, so that the internal extrusion member 25 can be unfolded, thereby lifting the position of the second clamping member 21. It clamps the exhaust pipe from both inside and outside, which can accurately clamp the car exhaust pipe 13, withstand greater force, and prevent the car exhaust pipe 13 from deforming, thereby reducing the deformation problem of the car exhaust pipe 13 during welding and improving the welding accuracy. At the same time, the welding angle and position can be adjusted by adjusting the adjusting member 23. Then, the support frame 14 and welding machine 15 are started to weld the exhaust pipe until the welding is completed. The second clamping member 21 is separated, and then the motor is started to drive the limit transmission member 26 to rotate in the opposite direction, so that the clamping is no longer applied, thus completing the welding. After repeating the above operations, the next round of welding work can be carried out.

[0021] like Figure 4 As shown, the adjusting member 23 includes a first telescopic rod 231 fixedly installed on the base 1 on the side away from the first clamping member 12. A spherical shell 232 is fixedly installed on the top of the first telescopic rod 231. A sphere 233 is movably installed inside the spherical shell 232. A second support block 234 is fixedly installed on the outside of the sphere 233. A second clamping member 21 is provided on the top of the second support block 234. A second telescopic rod 235 is fixedly installed on the side of the second support block 234. A centering clamping member 22 is fixedly installed at the end of the second telescopic rod 235.

[0022] It should be noted that when it is necessary to adjust the position of the second clamping member 21 and the centering clamping member 22, the position of the ball 233 inside the spherical shell 232 can be adjusted to achieve the purpose of adjusting the second clamping member 21 and the centering clamping member 22. Since the spherical shell 232 and the ball 233 are connected by friction, the position and direction can be adjusted by adjusting member 23.

[0023] like Figures 3 to 6As shown, the centering clamping member 22 includes a bottom mounting block 221 fixedly installed at the end of the second telescopic rod 235. A square limiting block 222 is fixedly installed on the top of the bottom mounting block 221. A clamping wall 223 is slidably installed on the square limiting block 222. A first sliding column 224 is fixedly installed at the end of the clamping wall 223. A first rotating block 225 is slidably installed inside the square limiting block 222. A rotating groove 226 is arranged in a circular array inside the first rotating block 225. The first sliding column 224 slides inside the rotating groove 226. A top fixing block 228 is fixedly installed on the top of the square limiting block 222. A center groove 227 is provided in the center of the first rotating block 225. The center groove 227 is used to allow the internal pressing member 25 to pass through. The top fixing block 228 is connected to the limiting transmission member 26.

[0024] It should be noted that when it is necessary to clamp the pipe connection block 17, it can be achieved by rotating the first rotating block 225. When the first rotating block 225 rotates, it can drive the first sliding column 224 and the clamping wall 223 to move closer to the center of the first rotating block 225. The center of the first rotating block 225 is provided with a rotating groove 226, which allows the internal extrusion member 25 to pass through when the clamping device 2 rotates and drives the internal extrusion member 25 to move. The side of the first rotating block 225 is provided with a third clamping member 24 and a limiting transmission member 26. The third clamping member 24 and the limiting transmission member 26 are engaged. Therefore, the third clamping member 24 can be rotated by rotating the limiting transmission member 26. The rotation of the third clamping member 24 can drive the first rotating block 225 to rotate, thereby achieving the effect of clamping the pipe connection block 17 by the clamping wall 223. When the welding is completed, the first rotating block 225 can be rotated in the opposite direction to achieve the disassembly function.

[0025] like Figures 1 to 8 As shown, a third clamping member 24 is fixedly installed on the side of the first rotating block 225. The third clamping member 24 includes a first gear 241 fixedly installed on the side of the first rotating block 225. A limit isolation plate 244 is fixedly installed on the first gear 241. A second tooth 243 is fixedly installed on the inner wall of the first gear 241. A first tooth 242 is fixedly installed on the outer wall of the first gear 241. The first gear 241 meshes with the limit transmission member 26.

[0026] It should be noted that the first gear 241 is fixedly installed with the first rotating block 225. Therefore, when the first gear 241 rotates, it can drive the first rotating block 225 to rotate. The inner wall of the first rotating block 225 is connected to the limiting transmission component 26. Therefore, when the limiting transmission component 26 is driven to rotate by the motor, it can drive the first rotating block 225 to rotate. The first gear 241 is provided with a first tooth 242 on its outside. By limiting the first tooth 242, the first rotating block 225 can be limited, thus preventing the problem of clamping loosening caused by welding and vibration.

[0027] like Figures 5 to 7 As shown, the limiting transmission component 26 includes a first pull block 261 fixedly installed at the end of the top fixing block 228. A telescopic power block 267 is fixedly installed at the bottom of the first pull block 261. A first lifting block 262 is slidably installed inside the telescopic power block 267. A first motor 265 is rotatably installed at the lower part of the first lifting block 262. A fifth gear 264 and a lifting column 263 are symmetrically installed on the first motor 265. The lifting column 263 meshes with the second tooth 243. The fifth gear 264 meshes with the internal pressing component 25. A third telescopic rod 266 is fixedly installed on the side of the first lifting block 262.

[0028] It should be noted that activating the third telescopic rod 266 can cause the first lifting block 262 to slide inside the telescopic power block 267, thus allowing the first lifting block 262 to rise. This, in turn, causes the fifth gear 264 and the lifting column 263 to rise. The lifting column 263 then meshes with the second tooth 243, causing the first rotating block 225 to rotate, thus clamping the pipe connecting block 17. Afterward, the third telescopic rod 266 causes the first lifting block 262 to descend, allowing the limit transmission block 268 to limit the first tooth 242, preventing the pipe from being clamped. To address the issue of loose connecting block 17, the side of the first pull block 261 is equipped with a spring protection block 269 and a limiting transmission block 268. When the limiting transmission block 268 is not limited by the first tooth 242, the rotation of the first tooth 242 will not be affected by the limiting transmission block 268. When the limiting transmission block 268 descends and engages with the first tooth 242, it can prevent the first rotating block 225 from rotating in the opposite direction, thereby preventing the first rotating block 225 from loosening during clamping, improving the clamping effect of the pipe connecting block 17, and preventing vibration and temperature difference during welding from affecting the welding.

[0029] like Figure 7 As shown, the limiting transmission component 26 includes a spring protection block 269 fixedly installed on the top of the first lifting block 262, and a limiting transmission block 268 is slidably installed on the outside of the spring protection block 269. The limiting transmission block 268 is used to limit the first tooth 242.

[0030] It should be noted that when the third telescopic rod 266 drives the first lifting block 262 to descend, it also drives the limit transmission block 268 to descend. Therefore, the first tooth 242 can be limited, preventing the first rotating block 225 from rotating due to temperature and vibration during welding, thus improving the welding accuracy.

[0031] like Figures 3 to 4 , Figure 8 As shown, the internal extrusion member 25 includes a rotating gear 255 rotatably mounted on the limiting isolation plate 244. The rotating gear 255 is internally threaded with a second threaded rod 257. An extrusion threaded rod 256 is slidably mounted inside the second threaded rod 257. An extrusion rotating plate 254 is fixedly mounted at the end of the second threaded rod 257 near the second clamping member 21. A second extrusion rod 253 is rotatably mounted inside the extrusion rotating plate 254. A first extrusion rod 252 is rotatably mounted at the end of the second extrusion rod 253. A third limiting plate 251 is rotatably mounted at the end of the first extrusion rod 252. The third limiting plate 251 is fixedly mounted at the end of the extrusion threaded rod 256. An internal moving member 258 is slidably mounted outside the second threaded rod 257. The internal moving member 258 is used to drive the extrusion threaded rod 256 to slide inside the second threaded rod 257. A protrusion is provided inside the first rotating block 225 to limit the second threaded rod 257.

[0032] It should be noted that when the third telescopic rod 266 extends and drives the lifting column 263 and the fifth gear 264 to move towards the center position near the limiting isolation plate 244, the lifting column 263 meshes with the rotating gear 255, thereby driving the second threaded rod 257 to move towards the second clamping member 21. In the normal state, a torsion spring is provided at the connection position of the first pressing rod 252 and the second pressing rod 253, so the second pressing rod 253 and the first pressing rod 252 are located on the outer wall of the pressing threaded rod 256. The two parts are on the same straight line. When the second threaded rod 257 moves to the position where the inner moving part 258 is close to the rotating gear 255, the inner moving part 258 meshes with the fifth gear 264, thereby driving the second pressing rod 253 and the farthest end of the pressing rotating plate 254 to move closer to each other. Then the second pressing rod 253 and the pressing rotating plate 254 unfold and lift up the inner wall of the car exhaust pipe 13, corresponding to the clamping position of the second clamping part 21. The rotating gear 255 and the lifting column 263 continue to mesh, and the second threaded rod 257 moves to the position where the inner moving part 258 is close to the rotating gear 255. The connection between the external part of rod 257 and the internal moving part 258 is not threaded. Therefore, the rotation of the rotating gear 255 will not drive the second threaded rod 257 to move continuously, thus lifting the inside of the car exhaust pipe 13 and preventing deformation of the clamping position. When it is necessary to adjust the position of the second threaded rod 257, the rotating gear 255 can be rotated in the opposite direction, that is, the second pressing rod 253 and the fifth gear 264 can be rotated in the opposite direction. The positions of the second pressing rod 253 and the first pressing rod 252 are provided with torsion springs. When the internal moving part 258 is no longer engaged with the fifth gear 264, the first pressing rod 252 and the second pressing rod 253 automatically reset. Under the action of the internal moving part 258, the lifting column 263 causes the rotating gear 255 to drive the second threaded rod 257 to move away from the second clamping part 21, thereby achieving the reset effect. Then, the third telescopic rod 266 is activated to drive the lifting column 263 and the fifth gear 264 to move upward, which can adjust the clamping effect of the first rotating block 225 and complete the welding process.

[0033] like Figure 8 As shown, the internal moving part 258 includes a limiting gear plate 2581 slidably mounted on the outside of the second threaded rod 257. A first spring 2582 is fixedly mounted on the side of the limiting gear plate 2581. A spring limiting plate 2583 is fixedly mounted on the end of the first spring 2582. A fourth gear 2584 is rotatably mounted on the side of the spring limiting plate 2583. The fourth gear 2584 is threadedly connected to the extrusion threaded rod 256. The fourth gear 2584 meshes with the fifth gear 264.

[0034] It should be noted that there is no thread between the limiting gear plate 2581 and the first spring 2582. Therefore, when the rotating gear 255 drives the second threaded rod 257 to the position of the limiting gear plate 2581, even if the rotating gear 255 continues to rotate, it will no longer drive the second threaded rod 257 to move closer to the second clamping member 21. Instead, the fifth gear 264 meshes with the fourth gear 2584, thereby driving the third limiting plate 251 to move closer to the fourth gear 2584. This causes the farthest ends of the first pressing rod 252 and the second pressing rod 253 to move closer to each other, thus clamping the inside of the car exhaust pipe 13. When the rotating gear 255 rotates in the opposite direction, under the action of the first spring 2582, the threads of the rotating gear 255 and the outside of the second threaded rod 257 mesh again, thereby driving the second threaded rod 257 to move away from the second clamping member 21, thus achieving the reset effect of the internal pressing member 25.

[0035] like Figures 6 to 8 As shown, the center of the rotating gear 255, the center of the limiting isolation plate 244, and the center of the central groove 227 are on the same straight line.

[0036] It should be noted that the center of the rotating gear 255 is on the same straight line as the center of the limiting isolation plate 244 and the center of the central groove 227, so that the entire internal extrusion member 25 can completely pass through the first rotating block 225, thereby allowing the first extrusion rod 252 and the second extrusion rod 253 to push up the inner wall of the car exhaust pipe 13.

[0037] like Figure 8 As shown, the diameter of the third limiting plate 251 is the same as the diameter of the second threaded rod 257.

[0038] It should be noted that the diameter of the third limiting plate 251 is the same as the diameter of the second threaded rod 257, so that the second threaded rod 257 can pass completely through the interior of the first rotating block 225 without being obstructed, thereby improving the stability of the device operation.

[0039] The embodiments of the present invention have been described above, but the present invention is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms based on the guidance of the embodiments described above, all of which are within the protection scope of the present invention.

Claims

1. A positioning mechanism for welding automotive parts, comprising a base (1), characterized in that: The top of the base (1) is fixedly equipped with symmetrically arranged slide rails (11), the bottom of the base (1) is fixedly equipped with a bottom support column (16), the internal thread of the slide rail (11) is equipped with a support frame (14), the center of the support frame (14) is fixedly equipped with a welding machine (15), the base (1) is provided with two first clamping parts (12), the first clamping parts (12) are provided with a car exhaust pipe (13), and the base (1) on the side away from the first clamping parts (12) is fixedly equipped with a clamping device (2), the clamping device (2) is used to clamp and limit the welding part of the part; The clamping device (2) includes a second clamping member (21), a centering clamping member (22), an adjusting member (23), an internal pressing member (25), and a limiting transmission member (26). The adjusting member (23) is fixedly installed on the top of the base (1) on the side away from the first clamping member (12). The second clamping member (21) is fixedly installed on the top of the adjusting member (23). The centering clamping member (22) is fixedly installed on the side of the adjusting member (23). A limiting transmission member is provided on the side of the centering clamping member (22) on the side away from the second clamping member (21). The transmission component (26) has an internal extrusion component (25) installed on its internal thread. The second clamping component (21) is used to clamp the exterior of the automobile exhaust pipe (13). A pipe connecting block (17) is provided at the center of the centering clamping component (22). The welding machine (15) welds the automobile exhaust pipe (13) and the pipe connecting block (17). The centering clamping component (22) is used to clamp the pipe connecting block (17). The internal extrusion component (25) is used to support the inner wall of the automobile exhaust pipe (13).

2. The positioning mechanism for welding automotive parts according to claim 1, characterized in that: The adjusting member (23) includes a first telescopic rod (231) fixedly installed on the base (1) on the side away from the first clamping member (12), a spherical shell (232) fixedly installed on the top of the first telescopic rod (231), a sphere (233) movably installed inside the spherical shell (232), a second support block (234) fixedly installed on the outside of the sphere (233), a second clamping member (21) provided on the top of the second support block (234), a second telescopic rod (235) fixedly installed on the side of the second support block (234), and a centering clamping member (22) fixedly installed at the end of the second telescopic rod (235).

3. The positioning mechanism for welding automotive parts according to claim 2, characterized in that: The centering clamping member (22) includes a bottom mounting block (221) fixedly installed at the end of the second telescopic rod (235). A square limiting block (222) is fixedly installed on the top of the bottom mounting block (221). A clamping wall (223) is slidably installed on the square limiting block (222). A first sliding column (224) is fixedly installed at the end of the clamping wall (223). A first rotating block (225) is slidably installed inside the square limiting block (222). A rotating groove (226) is arranged in a circular array inside the first rotating block (225). The first sliding column (224) slides inside the rotating groove (226). A top fixing block (228) is fixedly installed on the top of the square limiting block (222). A center groove (227) is provided in the center of the first rotating block (225). The center groove (227) is used to allow the internal extrusion member (25) to pass through. The top fixing block (228) is connected to the limiting transmission member (26).

4. The positioning mechanism for welding automotive parts according to claim 3, characterized in that: A third clamping member (24) is fixedly installed on the side of the first rotating block (225). The third clamping member (24) includes a first gear (241) fixedly installed on the side of the first rotating block (225). A limit isolation plate (244) is fixedly installed on the first gear (241). A second tooth (243) is fixedly installed on the inner wall of the first gear (241). A first tooth (242) is fixedly installed on the outer wall of the first gear (241). The first gear (241) meshes with the limit transmission member (26).

5. A positioning mechanism for welding automotive parts according to claim 4, characterized in that: The limiting transmission component (26) includes a first pull block (261) fixedly installed at the end of the top fixed block (228). A telescopic power block (267) is fixedly installed at the bottom of the first pull block (261). A first lifting block (262) is slidably installed inside the telescopic power block (267). A first motor (265) is rotatably installed at the lower part of the first lifting block (262). A fifth gear (264) and a lifting column (263) are symmetrically installed on the first motor (265). The lifting column (263) meshes with the second tooth (243). The fifth gear (264) meshes with the internal pressing component (25). A third telescopic rod (266) is fixedly installed on the side of the first lifting block (262).

6. A positioning mechanism for welding automotive parts according to claim 5, characterized in that: The limiting transmission component (26) includes a spring protection block (269) fixedly installed on the top of the first lifting block (262), and a limiting transmission block (268) is slidably installed on the outside of the spring protection block (269). The limiting transmission block (268) is used to limit the first tooth (242).

7. A positioning mechanism for welding automotive parts according to claim 6, characterized in that: The internal extrusion member (25) includes a rotating gear (255) rotatably mounted on a limiting isolation plate (244). A second threaded rod (257) is internally threaded onto the rotating gear (255). An extrusion threaded rod (256) is slidably mounted inside the second threaded rod (257). An extrusion rotating plate (254) is fixedly mounted at the end of the second threaded rod (257) near the second clamping member (21). A second extrusion rod (253) is rotatably mounted inside the extrusion rotating plate (254). The end of the second extrusion rod (253) rotates... A first extrusion rod (252) is installed, and a third limiting plate (251) is rotatably installed at the end of the first extrusion rod (252). The third limiting plate (251) is fixedly installed at the end of the extrusion threaded rod (256). An internal moving part (258) is slidably installed on the outside of the second threaded rod (257). The internal moving part (258) is used to drive the extrusion threaded rod (256) to slide inside the second threaded rod (257). A protrusion is provided inside the first rotating block (225) for limiting the second threaded rod (257).

8. A positioning mechanism for welding automotive parts according to claim 7, characterized in that: The internal moving part (258) includes a limiting gear plate (2581) slidably mounted on the outside of the second threaded rod (257). A first spring (2582) is fixedly mounted on the side of the limiting gear plate (2581). A spring limiting plate (2583) is fixedly mounted on the end of the first spring (2582). A fourth gear (2584) is rotatably mounted on the side of the spring limiting plate (2583). The fourth gear (2584) is threadedly connected to the extrusion threaded rod (256). The fourth gear (2584) meshes with the fifth gear (264).

9. A positioning mechanism for welding automotive parts according to claim 8, characterized in that: The center of the rotating gear (255) is on the same straight line as the center of the limiting isolation plate (244) and the center of the central groove (227).

10. A positioning mechanism for welding automotive parts according to claim 9, characterized in that: The diameter of the third limiting plate (251) is the same as the diameter of the second threaded rod (257).

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