A splicing and aligning fixture assembly for manufacturing automobile chassis

Abstract

This invention relates to the field of tooling fixture assembly technology, specifically to a tooling fixture assembly for splicing and alignment in automobile chassis manufacturing. It includes a worktable with four sets of first electric clamps sliding on its upper surface. A guide tube is installed on the upper surface of the worktable, with piston rods driven by the first electric clamps sliding at both ends of the guide tube. A second electric clamp is installed at the center of the upper surface of the worktable, with a positioning pin fixedly connected inside. Two sets of support plates slide on the upper surface of the worktable. This invention, through pretreatment of the crossbeam, removes oil stains, burrs, and unevenness at the welding position of the crossbeam, ensuring a smooth and clean welding end face. This prevents problems such as incomplete welding or large weld gaps caused by surface stains or unevenness. Simultaneously, it optimizes the welding foundation conditions after the crossbeam and longitudinal beam are spliced ​​and aligned, improving the welding strength and weld uniformity, and significantly improving the welding forming quality and structural stability of the automobile chassis.

Description

Technical Field

[0001] This invention relates to the field of tooling fixture assembly technology, specifically to a tooling fixture assembly for splicing and alignment in automobile chassis manufacturing. Background Technology

[0002] As the core load-bearing and transmission component of a car, the chassis is known as the "skeleton" of the vehicle. Its manufacturing precision directly determines the vehicle's handling stability, driving safety, and NVH performance. The splicing and welding quality of the chassis crossbeams and longitudinal beams are key links to ensure the structural strength and assembly precision of the chassis. In the actual operation of traditional clamping and positioning devices, the splicing end face of the crossbeam to be welded is prone to residual oil stains, cutting burrs, and uneven surface processing defects before processing. Such impurities and surface defects cannot be cleaned and repaired in advance, which will directly interfere with the fitting accuracy of the splicing surface, and thus have an adverse effect on the subsequent welding quality, weld joint strength and overall connection stability. Summary of the Invention

[0003] This invention pre-treats the crossbeams to remove oil stains, burrs, and unevenness at the welding positions, ensuring a smooth and clean welding surface. This prevents problems such as incomplete welding or large weld gaps caused by surface stains or unevenness. At the same time, it optimizes the welding base conditions after the crossbeams and longitudinal beams are spliced ​​and aligned, improving the welding bond strength and weld uniformity, and significantly improving the welding quality and structural stability of the automotive chassis.

[0004] To achieve the above objectives, the present invention provides the following technical solution: a tooling fixture assembly for splicing and alignment in automobile chassis manufacturing, comprising a worktable, four sets of first electric clamps slidingly mounted on the upper end of the worktable, a guide tube installed on the upper end of the worktable, piston rods driven by the first electric clamps slidingly at both ends of the guide tube, a second electric clamp installed at the center of the upper end of the worktable, a positioning pin fixedly connected inside the second electric clamp, two sets of support plates sliding on the upper end of the worktable, fixed frames sliding at both ends of the second electric clamp, and grinding discs rotating inside both sets of fixed frames; Multiple sets of support seats are installed on the upper part of the workbench. Two sets of support seats have a buckle on one side, and two sets of spring rods are connected inside the buckles. The other end of the two sets of spring rods is connected to a protrusion. The protrusion intermittently vibrates the longitudinal beam during the rotation of the beam. One side of each of the two sets of guide tubes is connected to a guide tube B. A push rod slides inside the guide tube B. One end of the push rod is fixedly connected to a pressure plate. Two sets of guide tubes C are installed on one side of the pressure plate, and both sets of guide tubes C are connected to the guide tube B. A top rod slides inside each set of guide tubes C.

[0005] Preferably, two sets of motors A are installed on the upper end of the worktable, and the output ends of the two sets of motors A are connected to threaded rods. The two sets of threaded rods are respectively threadedly connected to the two sets of first electric clamps, and the four sets of first electric clamps are slidably connected to the upper surface of the worktable.

[0006] Preferably, a motor B is installed on the upper end of the fixed frame, and a gear A is connected to the output end of the motor B. A gear ring is fixedly connected to the outside of the grinding disc, and the gear ring meshes with the gear A. A cylinder B is installed on the lower end of the worktable, and the output end of the cylinder B is connected to the fixed frame.

[0007] Preferably, a gear B is rotatably connected to the upper end of the workbench, and one end of the gear B is connected to a buckle.

[0008] Preferably, the piston rod is fixedly connected to the first electric clamp, one side of each of the two sets of guide tubes is connected to a connecting tube A, the other end of the two sets of connecting tubes A is connected to the guide tube B, a bracket is fixedly connected to the upper end of the worktable, the guide tube B is embedded in the bracket, and the guide tube B is located at the upper end of the second electric clamp.

[0009] Preferably, one end of the push rod is fixedly connected to a spring A, and the other end of the spring A is connected to the inner wall of the guide tube B.

[0010] Preferably, one side of the guide tube B is connected to a connecting tube B, and the other end of the connecting tube B is connected to two sets of guide tubes C, and a pressure valve is provided at the connection between the connecting tube B and the guide tube B.

[0011] Preferably, one end of the push rod is fixedly connected to a spring B, the other end of the spring B is connected to the inner wall of the guide tube C, and the push rod is located at the upper end of the pressure plate.

[0012] Preferably, two sets of cylinders A are installed at the lower end of the workbench, and the output ends of the two sets of cylinders A are respectively connected to two sets of support plates.

[0013] Compared with the prior art, the beneficial effects of the present invention are: 1. This invention pre-processes the crossbeam to remove oil stains, burrs, and unevenness at the welding position, ensuring a smooth and clean welding end face. This prevents problems such as incomplete welding or large weld gaps caused by surface stains or unevenness. At the same time, it optimizes the welding base conditions after the crossbeam and longitudinal beam are spliced ​​and aligned, improves the welding bonding strength and weld uniformity, and significantly improves the welding forming quality and structural stability of the automobile chassis.

[0014] 2. This invention generates continuous, slight, low-frequency vibrations during the welding process, which cause the weld slag and bubbles to rise and be discharged in a timely manner, reducing weld porosity and crack defects, improving weld density, and at the same time, the vibration can refine the weld grain structure, reduce welding residual stress, prevent the chassis beam from deforming or warping after welding, and ensure the splicing alignment accuracy and the structural strength of the entire vehicle chassis.

[0015] 3. This invention performs secondary pressing and correction on the crossbeam, compacting and fitting the positioning surface, cleaning the area around the positioning holes and removing debris to prevent impurities from interfering with the alignment of the positioning pins, thereby improving the positioning accuracy of the chassis crossbeam and longitudinal beam splicing. At the same time, when the air pressure reaches the threshold, it automatically triggers the top rod to quickly impact the pressure plate, allowing the vibration force to be transmitted to the crossbeam plate, releasing the internal stress of the sheet metal in advance, and reducing deformation, warping, and misalignment problems after subsequent welding. Attached Figure Description

[0016] Figure 1 This is one of the overall structural schematic diagrams of the present invention; Figure 2 This is a second schematic diagram of the overall structure of the present invention; Figure 3 This is one of the structural diagrams of the present invention; Figure 4 This is a partial structural diagram of the present invention; Figure 5 This is one of the partial structural cross-sectional views of the present invention; Figure 6 This is a second partial structural cross-sectional view of the present invention; Figure 7 For the present invention Figure 4 Enlarged view of the structure at point A in the middle.

[0017] In the diagram: 1. Workbench; 2. First electric clamp; 3. Threaded rod; 4. Motor A; 5. Piston rod; 6. Guide tube; 7. Connecting tube A; 8. Second electric clamp; 9. Positioning pin; 10. Support plate; 11. Cylinder A; 12. Fixing frame; 13. Grinding disc; 14. Gear ring; 15. Gear A; 16. Motor B; 17. Cylinder B; 18. Gear B; 19. Buckle; 20. Protrusion; 21. Spring rod; 22. Support seat; 23. Bracket; 24. Guide tube B; 25. Spring A; 26. Push rod; 27. Pressure plate; 28. Connecting tube B; 29. ​​Guide tube C; 31. Top rod; 32. Spring B. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0019] Reference Figures 1 to 7 This invention provides a tooling fixture assembly for splicing and alignment in automobile chassis manufacturing, including a worktable 1, four sets of first electric clamps 2 sliding on the upper end of the worktable 1, a guide tube 6 installed on the upper end of the worktable 1, piston rods 5 driven by the first electric clamps 2 sliding at both ends of the guide tube 6, a second electric clamp 8 installed at the center of the upper end of the worktable 1, a positioning pin 9 fixedly connected inside the second electric clamp 8, two sets of support plates 10 sliding on the upper end of the worktable 1, and fixed frames 12 sliding at both ends of the second electric clamp 8, with grinding discs 13 rotating inside the two sets of fixed frames 12; Multiple sets of support seats 22 are installed on the upper end of the workbench 1. Two sets of support seats 22 have a buckle 19 rotating on one side. Two sets of spring rods 21 are connected inside the two sets of buckles 19. The other end of the two sets of spring rods 21 is connected to a protrusion 20. The protrusion 20 intermittently vibrates the longitudinal beam during rotation. Two sets of guide tubes 6 are connected to one side of guide tube B24. A push rod 26 slides inside guide tube B24. One end of push rod 26 is fixedly connected to pressure plate 27. Two sets of guide tubes C29 are installed on one side of pressure plate 27. Both sets of guide tubes C29 are connected to guide tube B24. A top rod 31 slides inside both sets of guide tubes C29.

[0020] In an optional embodiment, two sets of motors A4 are installed on the upper end of the workbench 1. The output ends of the two sets of motors A4 are connected to threaded rods 3. The two sets of threaded rods 3 are respectively threadedly connected to two sets of first electric clamps 2. All four sets of first electric clamps 2 are slidably connected to the upper surface of the workbench 1. When using the device, the operator places the two sets of longitudinal beams to be welded into the two sets of first electric clamps 2 respectively. After the longitudinal beams are placed, the operator clamps and fixes the longitudinal beams inside the first electric clamps 2. After the longitudinal beams are clamped, the operator places the crossbeam into the second electric clamp 8. When placing the crossbeam, the operator positions the crossbeam using the positioning pin 9 inside the second electric clamp 8. After the crossbeam is placed inside the second electric clamp 8, the second electric clamp 8 will clamp and fix the crossbeam inside the second electric clamp 8.

[0021] In an optional embodiment, a motor B16 is mounted on the upper end of the fixed frame 12, and a gear A15 is connected to the output end of the motor B16. A gear ring 14 is fixedly connected to the outer side of the grinding disc 13, and the gear ring 14 meshes with the gear A15. A cylinder B17 is mounted on the lower end of the worktable 1, and the output end of the cylinder B17 is connected to the fixed frame 12. As described above, when using the device, the two sets of motors B16 will start. After the two sets of motors B16 start, they will synchronously drive the grinding discs 13 to rotate inside the fixed frame 12 through the gear ring 14. Since the crossbeam is installed, both ends of the crossbeam will contact one side of the two sets of grinding discs 13. When the two sets of grinding discs 13 rotate, they will grind the two ends of the crossbeam, thus pre-treating the welding joint of the crossbeam. This prevents the welding quality from deteriorating due to oil or unevenness at the welding joint between the crossbeam and the longitudinal beam. By pre-treating the crossbeam, oil, burrs, and unevenness at the welding position of the crossbeam are removed, ensuring that the welding end face is flat and clean. This prevents problems such as false welding or large welding gaps caused by surface stains or unevenness. At the same time, it optimizes the welding base conditions after the crossbeam and longitudinal beam are spliced ​​and aligned, improves the welding bonding strength and weld uniformity, and greatly improves the welding forming quality and structural stability of the automobile chassis. After the grinding disc 13 finishes grinding both ends of the crossbeam, cylinder B17 will drive the fixed frame 12 to descend. When the fixed frame 12 descends, it will simultaneously drive the grinding disc 13 to descend. After the grinding disc 13 descends, it will disengage from the crossbeam. When the grinding disc 13 disengages from the crossbeam, the two sets of motors A4 will drive the two sets of threaded rods 3 to rotate. When the two sets of threaded rods 3 rotate, they will drive the four sets of first electric clamps 2 to move synchronously. When the four sets of first electric clamps 2 move, they will simultaneously drive the longitudinal beam to contact both ends of the crossbeam. When the two sets of longitudinal beams contact the crossbeam, the longitudinal beam will be located on the upper end of the support base 22, and the welding robot will weld the longitudinal beam to the crossbeam.

[0022] In an optional embodiment, a gear B18 is rotatably connected to the upper end of the workbench 1, and one end of the gear B18 is connected to the buckle 19. As described above, when cylinder B17 drives the fixed frame 12 to descend, the fixed frame 12 will simultaneously drive motor B16 to descend. When motor B16 descends, it will simultaneously drive gear A15 to descend. After gear A15 descends, gear A15 will contact gear B18. When gear A15 contacts gear B18, gear A15 will drive gear B18 to rotate. When gear B18 rotates, it will simultaneously drive buckle 19 to rotate. When buckle 19 rotates, it will simultaneously drive protrusion 20 to rotate via two sets of spring rods 21. When protrusion 20 rotates, protrusion 20 will contact support seat 22. When protrusion 20 contacts support seat 22, protrusion 20 will exert pressure on support seat 22. 2. When the protrusion 20 strikes the support seat 22, the support seat 22 will transmit the vibration force to the longitudinal beam. As the protrusion 20 continues to rotate, the protrusion 20 will disengage from the support seat 22. As the protrusion 20 continues to rotate, the protrusion 20 will continue to contact the support seat 22. Thus, during the welding process of the longitudinal beam and the cross beam, a slight vibration will be continuously generated at the weld joint. This continuous slight low-frequency vibration during the welding process will cause the weld slag and bubbles to rise and be discharged in time, reducing weld porosity and crack defects, improving weld density. At the same time, the vibration can refine the weld grain structure, reduce welding residual stress, prevent the chassis beam from deforming or warping after welding, and ensure the splicing alignment accuracy and the structural strength of the entire vehicle chassis.

[0023] In an optional embodiment, the piston rod 5 is fixedly connected to the first electric clamp 2, and one side of each of the two sets of guide tubes 6 is connected to a connecting tube A7. The other end of the two sets of connecting tubes A7 is connected to the guide tube B24. A bracket 23 is fixedly connected to the upper end of the worktable 1, and the guide tube B24 is embedded in the bracket 23 and is located at the upper end of the second electric clamp 8. As described above, when the four sets of first electric clamps 2 move, the four sets of first electric clamps 2 will push the four sets of piston rods 5 to retract into the two sets of first electric clamps 2. When the piston rods 5 retract into the first electric clamps 2, the piston rods 5 will squeeze the gas into the connecting pipe A7. After the gas enters the connecting pipe A7, the connecting pipe A7 will transport the gas to the guide pipe B24.

[0024] In an optional embodiment, one end of the push rod 26 is fixedly connected to a spring A25, and the other end of the spring A25 is connected to the inner wall of the guide tube B24. When gas enters the guide tube B24, the air pressure inside the guide tube B24 will gradually increase. When the air pressure inside the guide tube B24 increases, the air pressure will squeeze the push rod 26 outward. When the push rod 26 is pushed outward, it will simultaneously push the pressure plate 27 down to contact the crossbeam. Then, before welding, the pressure plate 27 will squeeze the crossbeam again to prevent the positioning pin 9 from being inaccurately positioned due to impurities in the positioning hole inside the crossbeam.

[0025] In an optional embodiment, a connecting pipe B28 is connected to one side of the guide pipe B24, and the other end of the connecting pipe B28 is connected to two sets of guide pipes C29. A pressure valve is provided at the connection between the connecting pipe B28 and the guide pipe B24. As described above, when the pressure plate 27 contacts the crossbeam, as gas continuously enters the guide tube B24, the air pressure inside the guide tube B24 will continuously increase. When the air pressure inside the guide tube B24 reaches a certain threshold, the air pressure valve will open. After the air pressure valve opens, the air pressure inside the guide tube B24 will quickly enter the two sets of guide tubes C29 through the connecting pipe B28.

[0026] In an optional embodiment, one end of the push rod 31 is fixedly connected to a spring B32, the other end of the spring B32 is connected to the inner wall of the guide tube C29, and the push rod 31 is located at the upper end of the pressure plate 27. When air pressure rapidly enters the guide tube C29, it pushes the two sets of push rods 31 outwards. When the two sets of push rods 31 are pushed outwards and come into contact with the pressure plate 27, they generate vibration force on the pressure plate 27. When the vibration force acts on the pressure plate 27, the pressure plate 27 transmits the vibration force to the crossbeam. The pressure plate 27 then assists in the secondary positioning of the crossbeam by pressing down, and at the same time, the internal stress of the plate is released in advance by tapping. This allows for secondary pressing and correction of the crossbeam, compacting and fitting the positioning surface, cleaning the area around the positioning hole and removing debris, preventing impurities from interfering with the alignment of the positioning pin 9, and improving the positioning accuracy of the chassis crossbeam and longitudinal beam splicing. At the same time, when the air pressure reaches the threshold, the push rods 31 are automatically triggered to quickly impact the pressure plate 27, so that the vibration force is transmitted to the crossbeam plate, releasing the internal stress of the sheet metal in advance, and reducing deformation, warping and misalignment problems after subsequent welding.

[0027] In an optional embodiment, two sets of cylinders A11 are installed at the lower end of the workbench 1, and the output ends of the two sets of cylinders A11 are respectively connected to two sets of support plates 10. After welding is completed, the four sets of first electric clamps 2 will release the longitudinal beam. After the four sets of first electric clamps 2 release the longitudinal beam, the two sets of cylinders A11 will push the two sets of support plates 10 to rise. When the two sets of support plates 10 rise, they will lift the welded longitudinal beam. After the longitudinal beam is lifted, the four sets of first electric clamps 2 will reset. After the four sets of first electric clamps 2 reset, they will synchronously drive the piston rod 5 to reset. After the piston rod 5 resets, as the air pressure inside the guide tube B24 gradually decreases, the push rod 26 will reset through the spring A25. After the push rod 26 resets, the top rod 31 will reset through the spring B32.

[0028] Working principle: When using the device, the operator places the two sets of longitudinal beams to be welded into the two sets of first electric clamps 2 respectively. After the longitudinal beams are placed, the operator clamps and fixes the longitudinal beams inside the first electric clamps 2. After the longitudinal beams are clamped, the operator places the crossbeam into the second electric clamp 8. When placing the crossbeam, the operator positions the crossbeam using the positioning pin 9 inside the second electric clamp 8. After the crossbeam is placed inside the second electric clamp 8, the second electric clamp 8 will clamp and fix the crossbeam inside the second electric clamp 8. When using the device, the two sets of motors B16 will start. After the two sets of motors B16 start, the motors B16 will drive the grinding discs 13 to rotate inside the fixed frame 12 synchronously through the gear ring 14. Since the crossbeam is installed, both ends of the crossbeam will contact one side of the two sets of grinding discs 13. Therefore, when the two sets of grinding discs 13 rotate, the two sets of grinding discs 13 will rotate and grind the two ends of the crossbeam, thereby pre-treating the welded joint of the crossbeam. After the grinding disc 13 finishes grinding both ends of the crossbeam, cylinder B17 will drive the fixed frame 12 to descend. When the fixed frame 12 descends, it will simultaneously drive the grinding disc 13 to descend. After the grinding disc 13 descends, it will disengage from the crossbeam. When the grinding disc 13 disengages from the crossbeam, the two sets of motors A4 will drive the two sets of threaded rods 3 to rotate. When the two sets of threaded rods 3 rotate, they will drive the four sets of first electric clamps 2 to move synchronously. When the four sets of first electric clamps 2 move, they will simultaneously drive the longitudinal beam to contact both ends of the crossbeam. When the two sets of longitudinal beams contact the crossbeam, the longitudinal beam will be located on the upper end of the support base 22, and at this time the welding robot will weld the longitudinal beam to the crossbeam. When cylinder B17 drives the fixed frame 12 to descend, the fixed frame 12 will synchronously drive motor B16 to descend. When motor B16 descends, it will synchronously drive gear A15 to descend. After gear A15 descends, gear A15 will contact gear B18. When gear A15 contacts gear B18, gear A15 will drive gear B18 to rotate. When gear B18 rotates, it will synchronously drive buckle 19 to rotate. When buckle 19 rotates, it will synchronously drive the two sets of spring rods 21 to move. When the movable protrusion 20 rotates, it will contact the support seat 22. When the protrusion 20 contacts the support seat 22, it will strike the support seat 22. After the protrusion 20 strikes the support seat 22, the support seat 22 will transmit the vibration force to the longitudinal beam. As the protrusion 20 continues to rotate, it will disengage from the support seat 22. However, as the protrusion 20 continues to rotate, it will continue to contact the support seat 22. As a result, during the welding process of the longitudinal beam and the cross beam, slight vibrations will be continuously generated at the weld joint. When the four sets of first electric clamps 2 move, the four sets of first electric clamps 2 will push the four sets of piston rods 5 to retract into the two sets of first electric clamps 2. When the piston rods 5 retract into the first electric clamps 2, the piston rods 5 will squeeze the gas into the connecting pipe A7. After the gas enters the connecting pipe A7, the connecting pipe A7 will transport the gas to the guide pipe B24. After the gas enters the guide pipe B24, the air pressure inside the guide pipe B24 will gradually increase. When the air pressure inside the guide pipe B24 increases, the air pressure will squeeze the push rod 26 outward. When the push rod 26 is pushed outward, the push rod 26 will simultaneously push the pressure plate 27 down to contact the crossbeam. Then, before welding, the pressure plate 27 will squeeze the crossbeam again to prevent the positioning pin 9 from being inaccurately positioned due to impurities in the positioning hole inside the crossbeam. When the pressure plate 27 contacts the crossbeam, as gas continuously enters the guide tube B24, the air pressure inside the guide tube B24 will continuously increase. When the air pressure inside the guide tube B24 reaches a certain threshold, the air pressure valve will open. When the air pressure valve opens, the air pressure inside the guide tube B24 will quickly enter the two sets of guide tubes C29 through the connecting tube B28. When the air pressure quickly enters the guide tubes C29, the air pressure will push the two sets of push rods 31 outward quickly. When the two sets of push rods 31 are pushed outward quickly and come into contact with the pressure plate 27, the two sets of push rods 31 will generate vibration force on the pressure plate 27. When the vibration force acts on the pressure plate 27, the pressure plate 27 will transmit the vibration force to the crossbeam, and then the pressure plate 27 will assist in the secondary positioning of the crossbeam by pressing down, and at the same time, the internal stress of the plate will be released in advance by knocking. After welding is completed, the four sets of first electric clamps 2 will release the longitudinal beam. After the four sets of first electric clamps 2 release the longitudinal beam, the two sets of cylinders A11 will push the two sets of support plates 10 to rise. When the two sets of support plates 10 rise, they will lift the welded longitudinal beam. After the longitudinal beam is lifted, the four sets of first electric clamps 2 will reset. After the four sets of first electric clamps 2 reset, they will synchronously drive the piston rod 5 to reset. After the piston rod 5 resets, as the air pressure inside the guide tube B24 gradually decreases, the push rod 26 will reset through the spring A25. After the push rod 26 resets, the top rod 31 will reset through the spring B32.

[0029] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A tooling fixture assembly for splicing and alignment in automobile chassis manufacturing, comprising a worktable (1), characterized in that: Four sets of first electric clamps (2) slide on the upper end of the worktable (1). A guide tube (6) is installed on the upper end of the worktable (1). Piston rods (5) driven by the first electric clamps (2) slide on both ends of the guide tube (6). A second electric clamp (8) is installed at the center of the upper end of the worktable (1). A positioning pin (9) is fixedly connected inside the second electric clamp (8). Two sets of support plates (10) slide on the upper end of the worktable (1). Fixed frames (12) slide on both ends of the second electric clamp (8). Grinding discs (13) rotate inside both sets of fixed frames (12). The workbench (1) is equipped with multiple sets of support seats (22) on its upper end. Two sets of support seats (22) have a buckle (19) rotating on one side. Two sets of buckles (19) are connected to two sets of spring rods (21) inside. The other end of the two sets of spring rods (21) is connected to a protrusion (20). The protrusion (20) intermittently vibrates the longitudinal beam during rotation. One side of each of the two sets of guide tubes (6) is connected to a guide tube B (24). A push rod (26) slides inside the guide tube B (24). One end of the push rod (26) is fixedly connected to a pressure plate (27). Two sets of guide tubes C (29) are installed on one side of the pressure plate (27). Both sets of guide tubes C (29) are connected to the guide tube B (24). A top rod (31) slides inside each set of guide tubes C (29).

2. The tooling fixture assembly for splicing and alignment in automobile chassis manufacturing according to claim 1, characterized in that, Two sets of motors A (4) are installed on the upper end of the workbench (1). The output ends of the two sets of motors A (4) are connected to threaded rods (3). The two sets of threaded rods (3) are respectively threadedly connected to the two sets of first electric clamps (2). The four sets of first electric clamps (2) are slidably connected to the upper surface of the workbench (1).

3. The tooling fixture assembly for splicing and alignment in automobile chassis manufacturing according to claim 2, characterized in that, The upper end of the fixed frame (12) is equipped with a motor B (16), the output end of the motor B (16) is connected to a gear A (15), the outer side of the grinding disc (13) is fixedly connected with a gear ring (14), the gear ring (14) meshes with the gear A (15), the lower end of the worktable (1) is equipped with a cylinder B (17), the output end of the cylinder B (17) is connected to the fixed frame (12).

4. The tooling fixture assembly for splicing and alignment in automobile chassis manufacturing according to claim 1, characterized in that, The upper end of the workbench (1) is rotatably connected to a gear B (18), and one end of the gear B (18) is connected to a buckle (19).

5. A tooling fixture assembly for splicing and alignment in automobile chassis manufacturing according to claim 1, characterized in that, The piston rod (5) is fixedly connected to the first electric clamp (2). One side of each of the two sets of guide tubes (6) is connected to a connecting tube A (7). The other end of the two sets of connecting tubes A (7) is connected to the guide tube B (24). The upper end of the worktable (1) is fixedly connected to a bracket (23). The guide tube B (24) is embedded inside the bracket (23) and the guide tube B (24) is located at the upper end of the second electric clamp (8).

6. A tooling fixture assembly for splicing and alignment in automobile chassis manufacturing according to claim 1, characterized in that, One end of the push rod (26) is fixedly connected to a spring A (25), and the other end of the spring A (25) is connected to the inner wall of the guide tube B (24).

7. A tooling fixture assembly for splicing and alignment in automobile chassis manufacturing according to claim 1, characterized in that, One side of the guide tube B (24) is connected to the connecting tube B (28), and the other end of the connecting tube B (28) is connected to two sets of guide tubes C (29). A pressure valve is provided at the connection between the connecting tube B (28) and the guide tube B (24).

8. A tooling fixture assembly for splicing and alignment in automobile chassis manufacturing according to claim 1, characterized in that, One end of the top rod (31) is fixedly connected to a spring B (32), the other end of the spring B (32) is connected to the inner wall of the guide tube C (29), and the top rod (31) is located at the upper end of the pressure plate (27).

9. A tooling fixture assembly for splicing and alignment in automobile chassis manufacturing according to claim 1, characterized in that, Two sets of cylinders A (11) are installed at the lower end of the workbench (1), and the output ends of the two sets of cylinders A (11) are respectively connected to two sets of support plates (10).

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