Robot control-based part welding structure and use method thereof

Abstract

The invention discloses a part welding structure based on robot control and a using method thereof, and is applied to the technical field of robot welding. A workbench is arranged to be matched with a shaft bracket for supporting and mounting the structure, an arranged welding device is used for welding, a table plate is used for placing a machined part, and a clamping assembly is arranged for clamping the machined part; a horizontal frame vertically falls down, and a transmission sleeve and a sliding column are pressed by the horizontal frame, so that a cross frame and a cross plate can rotate along an arc-shaped frame and get close to a machined workpiece until a clamping rod is in contact with the clamped workpiece through a pressure pad; the clamping rod slides along the layer shell and buffers clamping force until clamping is stable, due to the fact that welding machining does not need large-force extrusion and fixation, the thin-wall part can be well protected, deformation of the thin-wall part due to excessive stress is avoided, and after clamping is stopped, the reset spring rebounds to push the clamping rod to reset.

Description

Technical Field

[0001] The invention belongs to the technical field of robot welding, and in particular relates to a robot-controlled parts welding structure and a use method thereof. Background Art

[0002] Robotic welding has many advantages. First of all, it can provide a high degree of precision and consistency. Compared with manual welding, robots can accurately perform welding operations according to preset procedures and parameters. The position, shape and quality of each welding can be highly consistent. Robotic welding can significantly improve production efficiency and can adapt to harsh working environments.

[0003] Chinese patent CN104785958B discloses a cryogenic tank outer parts robot welding workstation, which relates to a welding system for welding cryogenic tank outer parts. Its purpose is to provide a cryogenic tank outer parts robot welding workstation with high automation, good welding quality and high welding efficiency, including a workbench, a welding system and a control system are arranged on the workbench, the welding system includes a gantry, a side-hanging walking mechanism is installed on the horizontal guide rail of the gantry, the side-hanging walking mechanism includes a robot mounting base, a servo motor and a welding robot are installed on the robot mounting base, a welding gun and a three-dimensional laser scanner are installed on the mechanical arm of the welding robot, a roller frame is arranged on the workbench, each group of roller frames includes a driven roller frame and an active roller frame installed with an adjustment motor, and the control system includes a robot control unit, a PLC control unit, a scanner control unit, a welding control unit and a communication bus.

[0004] The existing robot-controlled parts welding structure and its use method can perform welding actions accurately and efficiently during processing, but the limitation of the positioning and fixing during parts processing is high. For example, the screw clamp is convenient for fixing square parts, while the pressure clamp can only fix pipe parts. The use effect is relatively simple. When processing thin-walled or hollow parts, if the clamping force is too large, it will easily cause deformation such as dents and cannot be used normally. In addition, the positioning is also very troublesome when fixing and docking large parts. Not only is it difficult to fix, but it may also cause displacement, resulting in failure of normal processing.

[0005] Based on the above-mentioned situation, we found that it is difficult for the existing robot-controlled parts welding structure to avoid the above problems at the same time. Therefore, we proposed a robot-controlled parts welding structure and its use method that can quickly and stably clamp parts of different types and sizes, avoid damage to thin-walled parts due to excessive fixing force, and can fix larger workpieces multiple times. Summary of the invention

[0006] The purpose of the present invention is to target an existing robot-controlled parts welding structure and its use method, which has the advantages of being able to quickly and stably clamp parts of different types and sizes, while avoiding damage to thin-walled parts due to excessive fixing force, and being able to fix larger workpieces multiple times.

[0007] The above technical objectives of the present invention are achieved through the following technical solutions: a robot-controlled parts welding structure, comprising a workbench, an axis frame, a welding device and a table plate, wherein the axis frame is bolted to the rear side of the workbench, the top of the workbench is bolted to the table plate, the front side of the axis frame is movably connected to the welding device, a clamping assembly is installed on the top of the table plate, a horizontal electric cylinder is bolted to the bottom of the workbench, the telescopic end of the horizontal electric cylinder is bolted to a connecting frame, the bottom of the connecting frame is bolted to a fixed electric cylinder, the bottom of the fixed electric cylinder is bolted to a cross frame, the inner side of the cross frame is rotatably connected to a press frame, the bottom of the press frame is bolted to an air bag, and the telescopic end of the fixed electric cylinder is interactively connected to the press frame;

[0008] The clamping assembly comprises an arc frame, the inner side of the arc frame is rotatably connected with a cross frame and a cross plate, the outer side of the cross frame is bolted with a transmission sleeve, the outer side of the transmission sleeve is bolted with a sliding column, the outer side of the sliding column is slidably connected with a horizontal frame, the outer sides of the cross frame and the cross plate are both movably connected with a sliding sleeve, and the inner side of the sliding sleeve is movably connected with a clamping rod;

[0009] The front side of the sliding sleeve is threadedly connected with a fastening screw, the bottom of the sliding sleeve is bolted with an empty shell, the inner side of the empty shell is bolted with a layer shell, the inner side of the layer shell is slidably connected with a push block, the bottom of the push block is bolted with a clamping rod, the bottom of the clamping rod is bolted with a pressure pad, and the top of the pressure pad is bolted with a return spring.

[0010] The above technical solution is adopted, by setting a workbench and an axle frame to support and install the structure, the welding device is used for welding, the table is used to place the processed parts, and by setting a clamping assembly, the cross frame and the cross plate fall vertically because the horizontal frame, the transmission sleeve and the sliding column are pressed down by the horizontal frame, so they will rotate along the arc frame and approach the workpiece to be processed until the clamping rod contacts the clamped workpiece through the pressure pad. When the pressure pad applies pressure to the clamped workpiece, the clamping rod will slide along the layer shell and buffer the clamping force until the clamping is stable. Because the welding process does not require large-scale squeezing and fixing, Therefore, thin-walled parts can be well protected to avoid deformation caused by excessive force. After clamping stops, the reset spring rebounds and pushes the clamping rod to reset. When processing larger hollow shell parts or cylindrical parts, the telescopic end of the horizontal electric cylinder retracts, so that the connecting frame connected to it and the fixed electric cylinder and the cross frame move horizontally until they extend into the inside of the workpiece being processed. At this time, the fixed electric cylinder extends and pushes the pressing frame to rotate along the cross frame. The airbag is expanded by injecting gas through an external air pump and presses the workpiece from the inside to fix it. It is then further fixed by the clamping assembly. Through multiple fixations, the parts are more stable and less likely to tilt or loosen.

[0011] The present invention is further configured as follows: a bottom pad is bolted to the top of the workbench, and a drain groove is opened on the top of the workbench.

[0012] By adopting the above technical solution, by setting a bottom pad, friction can be increased when clamping the parts, making the clamping of the parts more stable. By setting a leakage groove, the welding slag can be easily drained, and the bottom airflow can cool the parts.

[0013] The present invention is further configured as follows: a heat dissipation fan is bolted to the left side of the workbench, a cooling pump, a heat exchanger and a water tank are bolted to the bottom of the workbench, a cooling pipe is installed on the inner side of the table plate, and the cooling pipe, cooling pump, heat exchanger and water tank are connected.

[0014] By adopting the above technical solution, by setting up a heat dissipation fan, the air flow speed can be increased to improve the cooling effect. The cooling pipe set can further cool the air flow. The cooling pump, heat exchanger and water tank set can circulate the coolant in the cooling pipe.

[0015] The present invention is further configured as follows: a guide rail is bolted to the outer side of the shaft frame, a transmission screw is rotatably connected to the inner side of the guide rail, a transmission block is threadedly connected to the outer side of the transmission screw, the outer side of the transmission block is slidingly connected to the guide rail, a transmission rod is bolted to the front side of the transmission block, and the front side of the transmission rod is bolted to the horizontal frame.

[0016] By adopting the above technical solution, by setting a guide rail to cooperate with the transmission screw, when the transmission screw rotates, the transmission block connected thereto will move along the guide rail to drive the transmission rod to vertically move the horizontal frame.

[0017] The present invention is further configured as follows: a control motor is installed at the bottom of the guide rail, and the output end of the control motor is bolted to the transmission screw.

[0018] By adopting the above technical solution and setting a control motor, it is convenient to drive the transmission screw to rotate, and it is convenient to control the rotation speed and lifting length of the structure.

[0019] The present invention is further configured as follows: the top and the bottom of the inner wall of the hollow shell are both bolted with limit blocks, and the inner side of the hollow shell is filled with oil.

[0020] By adopting the above technical solution, by setting a limit block, the movement of the push block can be limited to avoid failure to reset normally due to excessive movement.

[0021] The present invention is further configured as follows: a short shaft is rotatably connected to the inner side of the cross frame, and the outer side of the short shaft is rotatably connected to the pressure frame.

[0022] By adopting the above technical solution and providing a short shaft, the cross frame and the pressure frame can be easily connected, and the pressure frame can be rotated along the cross frame.

[0023] The present invention is further configured as follows: a connecting block is slidably connected to the inner side of the pressing frame, and the top of the connecting block is rotatably connected to the telescopic end of the fixed electric cylinder.

[0024] By adopting the above technical solution, by setting a connecting block, it is convenient to rotate the connecting block relative to the telescopic end of the fixed electric cylinder when the fixed electric cylinder pushes and pulls the pressure frame, and slide on the inner side of the pressure frame, so that the structure is not easy to get stuck.

[0025] The present invention is further configured as follows: a slide bar is bolted to the top of the connecting frame, a limit frame is bolted to the top of the workbench, and the inner side of the limit frame is slidably connected to the slide bar.

[0026] By adopting the above technical solution, by arranging a slide bar in cooperation with a limit frame, when the connecting frame moves horizontally, the slide bar slides on the inner side of the limit frame, which can facilitate the support and limit of the structure.

[0027] A robot-controlled parts welding structure and a method of using the same, comprising the following steps:

[0028] S1. First, place the workpiece to be processed on the table and place it horizontally. Then control the motor to drive the transmission screw to rotate, so that the transmission block and transmission rod connected to it fall vertically. At this time, the cross frame and the cross plate will rotate along the arc frame and approach the workpiece to be processed because the transmission sleeve and the slide column are pressed down by the horizontal frame, until the clamping rod contacts the clamped workpiece through the pressure pad;

[0029] S2. When the pressure pad applies pressure to the clamped workpiece, the clamping rod will slide along the layer shell and buffer the clamping force until the clamping is stable, and then the welding device can be moved along the shaft frame to perform welding. When the structure is reset after welding, the reset spring rebounds and pushes the clamping rod to reset;

[0030] S3. When the workpiece being clamped is too large, the telescopic end of the horizontal electric cylinder retracts, causing the connecting frame connected to it, as well as the fixed electric cylinder and the cross frame to move horizontally until they extend into the inner side of the workpiece being processed. At this time, the fixed electric cylinder extends, pushing the pressing frame to rotate along the cross frame. The airbag is expanded by injecting gas through an external air pump and presses the workpiece from the inside for pre-fixation, and then fixed by the clamping assembly.

[0031] In summary, the present invention has the following beneficial effects:

[0032] By setting a workbench and an axle frame to support and install the structure, a welding device is set up for welding, and a table is used to place the processed parts. By setting a clamping assembly, the cross frame and the cross plate will rotate along the arc frame and approach the workpiece to be processed because the horizontal frame drops vertically, and the transmission sleeve and the sliding column are pressed down by the horizontal frame, until the clamping rod contacts the clamped workpiece through the pressure pad. When the pressure pad applies pressure to the clamped workpiece, the clamping rod will slide along the layer shell and buffer the clamping force until the clamping is stable. Because welding processing does not require large-scale extrusion and fixation, it can be It can well protect thin-walled parts to avoid deformation caused by excessive force. After stopping clamping, the reset spring rebounds and pushes the clamping rod to reset. When processing larger hollow shell parts or cylindrical parts, the telescopic end of the horizontal electric cylinder retracts, so that the connecting frame connected to it and the fixed electric cylinder and the cross frame move horizontally until they extend into the inside of the workpiece being processed. At this time, the fixed electric cylinder extends and pushes the pressing frame to rotate along the cross frame. The airbag is expanded by injecting gas through an external air pump and presses the workpiece from the inside to fix it. It is then further fixed by the clamping assembly. Through multiple fixations, the parts are more stable and less likely to tilt or loosen. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0034] Figure 2 It is a schematic diagram of the cross frame structure of the present invention;

[0035] Figure 3 It is a schematic diagram of the press frame structure of the present invention;

[0036] Figure 4 It is a schematic diagram of the connection of the arc frame structure of the present invention;

[0037] Figure 5 It is a schematic diagram of the structure of the clamping assembly of the present invention;

[0038] Figure 6 It is a structural schematic diagram of the sliding sleeve of the present invention;

[0039] Figure 7 It is a schematic diagram of the main structure of the present invention;

[0040] Figure 8 It is a flow chart of the method of use of the present invention.

[0041] Reference numerals: 1, workbench; 2, shaft frame; 3, welding device; 4, table; 5, clamping assembly; 501, arc frame; 502, cross frame; 503, cross plate; 504, transmission sleeve; 505, sliding column; 506, horizontal frame; 507, sliding sleeve; 508, clamping rod; 6, horizontal electric cylinder; 7, connecting frame; 8, fixed electric cylinder; 9, cross frame; 10, press frame; 11, air bag; 1 2. Fastening screw; 13. Empty shell; 14. Layer shell; 15. Push block; 16. Pressure pad; 17. Reset spring; 18. Bottom pad; 19. Leakage groove; 20. Cooling fan; 21. Cooling pipe; 22. Guide rail; 23. Transmission screw; 24. Transmission block; 25. Limiting frame; 26. Transmission rod; 27. Control motor; 28. Limiting block; 29. ​​Short shaft; 30. Connecting block; 31. Sliding rod. DETAILED DESCRIPTION

[0042] The present invention is further described in detail below in conjunction with the accompanying drawings.

[0043] Embodiment 1:

[0044] refer to Figure 1-7A robot-controlled parts welding structure includes a workbench 1, an axis frame 2, a welding device 3 and a table 4. The axis frame 2 is bolted to the rear side of the workbench 1, the top of the workbench 1 is bolted to the table 4, the front side of the axis frame 2 is movably connected to the welding device 3, a clamping assembly 5 is installed on the top of the table 4, a horizontal electric cylinder 6 is bolted to the bottom of the workbench 1, a connecting frame 7 is bolted to the telescopic end of the horizontal electric cylinder 6, a fixed electric cylinder 8 is bolted to the bottom of the connecting frame 7, a cross frame 9 is bolted to the bottom of the fixed electric cylinder 8, a press frame 10 is rotatably connected to the inner side of the cross frame 9, and an airbag 1 is bolted to the bottom of the press frame 10 1. The telescopic end of the fixed electric cylinder 8 is interactively connected with the pressing frame 10. When processing a larger hollow shell 13 part or a cylindrical part, the telescopic end of the horizontal electric cylinder 6 retracts, so that the connecting frame 7 connected thereto and the fixed electric cylinder 8 and the cross frame 9 move horizontally until they extend into the inside of the workpiece being processed. At this time, the fixed electric cylinder 8 extends, pushing the pressing frame 10 to rotate along the cross frame 9. The airbag 11 is expanded by injecting gas through an external air pump and presses the workpiece from the inside to fix it. It is then further fixed by the clamping assembly 5. Through multiple fixations, the parts are more stable and less likely to tilt or loosen.

[0045] like Figure 1 As shown, a bottom pad 18 is bolted to the top of the workbench 1, and a leakage groove 19 is provided on the top of the workbench 1. By providing the bottom pad 18, friction can be increased when clamping the parts, making the clamping of the parts more stable. By providing the leakage groove 19, welding slag can be easily drained, and the bottom airflow can cool the parts.

[0046] like Figure 1 As shown, a heat dissipation fan 20 is bolted to the left side of the workbench 1, a cooling pump, a heat exchanger and a water tank are bolted to the bottom of the workbench 1, a cooling pipe 21 is installed on the inner side of the table plate 4, and the cooling pipe 21, the cooling pump, the heat exchanger and the water tank are connected. By setting the heat dissipation fan 20, the air flow speed can be increased to improve the cooling effect. The cooling pipe 21 can further cool the air flow. The cooling pump, the heat exchanger and the water tank can circulate the coolant in the cooling pipe 21.

[0047] like Figure 2 As shown, the inner side of the cross frame 9 is rotatably connected with a short shaft 29, and the outer side of the short shaft 29 is rotatably connected to the pressure frame 10. By setting the short shaft 29, the cross frame 9 and the pressure frame 10 can be easily connected, and the pressure frame 10 can be rotated along the cross frame 9.

[0048] like Figure 3 As shown, a connecting block 30 is slidably connected to the inner side of the pressing frame 10, and the top of the connecting block 30 is rotatably connected to the telescopic end of the fixed electric cylinder 8. By providing the connecting block 30, when the fixed electric cylinder 8 pushes and pulls the pressing frame 10, the connecting block 30 can be easily rotated relative to the telescopic end of the fixed electric cylinder 8, and slide on the inner side of the pressing frame 10, so that the structure is not easy to get stuck.

[0049] like Figure 7 As shown, a slide bar 31 is bolted to the top of the connecting frame 7, and a limit frame 25 is bolted to the top of the workbench 1. The inner side of the limit frame 25 is slidably connected to the slide bar 31. By arranging the slide bar 31 to cooperate with the limit frame 25, when the connecting frame 7 moves horizontally, the slide bar 31 slides on the inner side of the limit frame 25, which can facilitate the support and limitation of the structure.

[0050] Brief description of the usage process: First, place the workpiece to be processed on the table 4, and the telescopic end of the horizontal electric cylinder 6 retracts, so that the connecting frame 7 connected thereto and the fixed electric cylinder 8 and the cross frame 9 move horizontally until they extend into the inner side of the workpiece to be processed. At this time, the fixed electric cylinder 8 extends, pushing the pressing frame 10 to rotate along the cross frame 9. The airbag 11 is expanded by injecting gas through an external air pump and presses the workpiece from the inside for pre-fixation, and then fixed by the clamping assembly 5. During welding, the heat dissipation fan 20 will drive the airflow through the table 4. Because there is a leakage groove 19, the airflow can accelerate the cooling of the welding position.

[0051] Embodiment 2:

[0052] refer to Figure 1-7 A robot-controlled parts welding structure includes a workbench 1, an axle frame 2, a welding device 3 and a table 4. The axle frame 2 is bolted to the rear side of the workbench 1, the top of the workbench 1 is bolted to the table 4, the front side of the axle frame 2 is movably connected to the welding device 3, a clamping assembly 5 is installed on the top of the table 4, a horizontal electric cylinder 6 is bolted to the bottom of the workbench 1, a connecting frame 7 is bolted to the telescopic end of the horizontal electric cylinder 6, a fixed electric cylinder 8 is bolted to the bottom of the connecting frame 7, a cross frame 9 is bolted to the bottom of the fixed electric cylinder 8, a pressing frame 10 is rotatably connected to the inner side of the cross frame 9, an air bag 11 is bolted to the bottom of the pressing frame 10, and the telescopic end of the fixed electric cylinder 8 is interactively connected to the pressing frame 10;

[0053] The clamping assembly 5 includes an arc frame 501, the inner side of the arc frame 501 is rotatably connected to a cross frame 502 and a cross plate 503, the outer side of the cross frame 502 is bolted to a transmission sleeve 504, the outer side of the transmission sleeve 504 is bolted to a slide column 505, the outer side of the slide column 505 is slidably connected to a horizontal frame 506, the outer sides of the cross frame 502 and the cross plate 503 are both movably connected to a slide sleeve 507, and the inner side of the slide sleeve 507 is movably connected to a clamping rod 508;

[0054] The front side of the sliding sleeve 507 is threadedly connected with a fastening screw 12, the bottom of the sliding sleeve 507 is bolted with an empty shell 13, the inner side of the empty shell 13 is bolted with a layer shell 14, the inner side of the layer shell 14 is slidably connected with a push block 15, the bottom of the push block 15 is bolted with a clamping rod 508, the bottom of the clamping rod 508 is bolted with a pressure pad 16, and the top of the pressure pad 16 is bolted with a return spring 17;

[0055] By setting a workbench 1 and an axis frame 2, the structure is supported and installed, the welding device 3 is used for welding, and the table 4 is used to place the processed parts. By setting a clamping assembly 5, the cross frame 502 and the cross plate 503 fall vertically because the horizontal frame 506, and the transmission sleeve 504 and the sliding column 505 are pressed down by the horizontal frame 506, so they will rotate along the arc frame 501 and approach the workpiece being processed until the clamping rod 508 contacts the clamped workpiece through the pressure pad 16. When the pressure pad 16 applies pressure to the clamped workpiece, the clamping rod 508 slides along the layer shell 14 and buffers the clamping force until the clamping is stable. Because the welding process does not require large-scale squeezing and fixing, thin-walled parts can be well protected to avoid deformation caused by excessive force. After the clamping stops, the reset spring 17 rebounds and pushes the clamping rod 508 to reset.

[0056] like Figure 7 As shown, the outer side of the axis frame 2 is bolted with a guide rail 22, the inner side of the guide rail 22 is rotatably connected with a transmission screw 23, the outer side of the transmission screw 23 is threadedly connected with a transmission block 24, the outer side of the transmission block 24 is slidably connected to the guide rail 22, the front side of the transmission block 24 is bolted with a transmission rod 26, and the front side of the transmission rod 26 is bolted to the horizontal frame 506. By arranging the guide rail 22 to cooperate with the transmission screw 23, when the transmission screw 23 rotates, the transmission block 24 connected thereto will move along the guide rail 22 to drive the transmission rod 26 to vertically move the horizontal frame 506.

[0057] like Figure 7 As shown, a control motor 27 is installed at the bottom of the guide rail 22, and the output end of the control motor 27 is bolted to the transmission screw 23. By setting the control motor 27, it is convenient to drive the transmission screw 23 to rotate, and it is convenient to control the rotation speed and lifting length of the structure.

[0058] like Figure 6 As shown, the top and bottom of the inner wall of the hollow shell 13 are bolted with limit blocks 28, and the inner side of the hollow shell 13 is filled with oil. By setting the limit blocks 28, the movement of the push block 15 can be limited to avoid failure to reset normally due to excessive movement.

[0059] Brief description of the usage process: First, place the workpiece to be processed on the table 4 and place it horizontally, then control the motor 27 to drive the transmission screw 23 to rotate, so that the transmission block 24 and the transmission rod 26 connected thereto fall vertically. At this time, the cross frame 502 and the cross plate 503 will rotate along the arc frame 501 and approach the workpiece to be processed because the transmission sleeve 504 and the sliding column 505 are pressed down by the horizontal frame 506, until the clamping rod 508 contacts the clamped workpiece through the pressure pad 16. When the pressure pad 16 applies pressure to the clamped workpiece, the clamping rod 508 will slide along the layer shell 14. At this time, the push block 15 will push the oil to flow along the groove of the layer shell 14 to play a damping and buffering effect until the clamping is stable. Then, it can be moved along the shaft frame 2 through the welding device 3 to perform welding. When the structure is reset after welding is completed, the reset spring 17 rebounds and pushes the clamping rod 508 to reset for subsequent processing.

[0060] This specific embodiment is merely an explanation of the present invention and is not a limitation of the present invention. After reading this specification, those skilled in the art may make non-creative modifications to the present embodiment as needed. However, as long as they are within the scope of the claims of the present invention, they are protected by the patent law.

Claims

1. A robot-controlled parts welding structure, comprising a workbench (1), a shaft frame (2), a welding device (3) and a table (4), characterized in that: The shaft frame (2) is bolted to the rear side of the workbench (1), the top of the workbench (1) is bolted to the table plate (4), the front side of the shaft frame (2) is movably connected to the welding device (3), the top of the table plate (4) is equipped with a clamping assembly (5), the bottom of the workbench (1) is bolted to a horizontal electric cylinder (6), the telescopic end of the horizontal electric cylinder (6) is bolted to a connecting frame (7), the bottom of the connecting frame (7) is bolted to a fixed electric cylinder (8), the bottom of the fixed electric cylinder (8) is bolted to a cross frame (9), the inner side of the cross frame (9) is rotatably connected to a press frame (10), the bottom of the press frame (10) is bolted to an air bag (11), and the telescopic end of the fixed electric cylinder (8) is interactively connected to the press frame (10); The clamping assembly (5) comprises an arc frame (501), the inner side of the arc frame (501) is rotatably connected to a cross frame (502) and a cross plate (503), the outer side of the cross frame (502) is bolted to a transmission sleeve (504), the outer side of the transmission sleeve (504) is bolted to a sliding column (505), the outer side of the sliding column (505) is slidably connected to a horizontal frame (506), the outer sides of the cross frame (502) and the cross plate (503) are both movably connected to a sliding sleeve (507), and the inner side of the sliding sleeve (507) is movably connected to a clamping rod (508); The front side of the sliding sleeve (507) is threadedly connected to a fastening screw (12), the bottom of the sliding sleeve (507) is bolted to an empty shell (13), the inner side of the empty shell (13) is bolted to a layer shell (14), the inner side of the layer shell (14) is slidably connected to a push block (15), the bottom of the push block (15) is bolted to a clamping rod (508), the bottom of the clamping rod (508) is bolted to a pressure pad (16), and the top of the pressure pad (16) is bolted to a return spring (17).

2. A robot-controlled parts welding structure according to claim 1, characterized in that: A bottom pad (18) is bolted to the top of the workbench (1), and a drain groove (19) is provided on the top of the workbench (1).

3. A robot-controlled parts welding structure according to claim 2, characterized in that: A heat dissipation fan (20) is bolted to the left side of the workbench (1), a cooling pump, a heat exchanger and a water tank are bolted to the bottom of the workbench (1), a cooling pipe (21) is installed on the inner side of the table plate (4), and the cooling pipe (21), the cooling pump, the heat exchanger and the water tank are connected.

4. The robot-controlled parts welding structure according to claim 1, characterized in that: The outer side of the shaft frame (2) is bolted with a guide rail (22), the inner side of the guide rail (22) is rotatably connected with a transmission screw (23), the outer side of the transmission screw (23) is threadedly connected with a transmission block (24), the outer side of the transmission block (24) is slidably connected to the guide rail (22), the front side of the transmission block (24) is bolted with a transmission rod (26), and the front side of the transmission rod (26) is bolted to the horizontal frame (506).

5. The robot-controlled parts welding structure according to claim 4, characterized in that: A control motor (27) is installed at the bottom of the guide rail (22), and the output end of the control motor (27) is bolted to the transmission screw (23).

6. The robot-controlled parts welding structure according to claim 1, characterized in that: The top and bottom of the inner wall of the hollow shell (13) are both bolted with limit blocks (28), and the inside of the hollow shell (13) is filled with oil.

7. The robot-controlled parts welding structure according to claim 1 is characterized in that: The inner side of the cross frame (9) is rotatably connected to a short shaft (29), and the outer side of the short shaft (29) is rotatably connected to the press frame (10).

8. The robot-controlled parts welding structure according to claim 1, characterized in that: A connecting block (30) is slidably connected to the inner side of the pressing frame (10), and the top of the connecting block (30) is rotatably connected to the telescopic end of the fixed electric cylinder (8).

9. The robot-controlled parts welding structure according to claim 1, characterized in that: The top of the connecting frame (7) is bolted with a sliding rod (31), the top of the workbench (1) is bolted with a limiting frame (25), and the inner side of the limiting frame (25) is slidably connected to the sliding rod (31).

10. A method for using a robot-controlled part welding structure according to any one of claims 1 to 9, characterized in that: The following steps are involved: S1. First, the workpiece to be processed is placed on the table (4) and arranged horizontally, and then the motor (27) is controlled to drive the transmission screw (23) to rotate, so that the transmission block (24) and the transmission rod (26) connected thereto fall vertically. At this time, the cross frame (502) and the cross plate (503) are pressed down by the horizontal frame (506) because the transmission sleeve (504) and the slide column (505) are pressed down by the horizontal frame (506), so they will rotate along the arc frame (501) and approach the workpiece to be processed until the clamping rod (508) contacts the clamped workpiece through the pressure pad (16); S2. When the pressure pad (16) applies pressure to the clamped workpiece, the clamping rod (508) slides along the layer shell (14) and buffers the clamping force until the clamping is stable, and then the welding device (3) can be moved along the shaft frame (2) to perform welding. When the structure is reset after welding, the reset spring (17) rebounds and pushes the clamping rod (508) to reset; S3. When the clamped workpiece is too large, the telescopic end of the horizontal electric cylinder (6) retracts, causing the connecting frame (7) and the fixed electric cylinder (8) and the cross frame (9) connected thereto to move horizontally until they extend into the inner side of the workpiece being processed. At this time, the fixed electric cylinder (8) extends, pushing the pressing frame (10) to rotate along the cross frame (9), and the airbag (11) is expanded by injecting gas through an external air pump and presses against the workpiece from the inside to pre-fix it, and then fixes it through the clamping assembly (5).

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