Welding clamping tool for welding robot

Abstract

The utility model discloses a welding clamping tool for a welding robot, which relates to the technical field of welding clamping and comprises a workbench and a rotary circular plate. The supporting column is fixedly arranged on the rotating circular plate, an outer supporting rod is arranged on the supporting column, a sliding groove is formed in the outer supporting rod, and a sliding rod slides in the sliding groove; a fixing plate is further included, a clamping plate is slidably arranged on the fixing plate, and a lifting plate is slidably arranged at the bottom of the rotating circular plate; a servo motor drives a lifting plate and a rotating circular plate to rotate, a welding robot can conveniently weld a flange plate and a pipe fitting, meanwhile, when the lifting plate rotates, the lifting plate is driven to descend through a first abutting ring and a second abutting ring, and then an outer supporting plate is driven to be opened to abut against and fix the inner wall of the pipe fitting; and therefore, the clamping device is prevented from interfering with the welding head when the round pipe rotates, the lifting plate can drive the lower pressing block to push the clamping plate to the flange plate to clamp the flange plate while descending, and the welding stability is improved.

Description

Technical Field

[0001] This utility model relates to the field of welding clamping technology, specifically to a welding clamping fixture for a welding robot. Background Technology

[0002] A welding robot is an industrial robot used for automated welding operations. It can precisely control welding tools according to pre-set programs and paths to complete various welding tasks.

[0003] Circular arc welding is involved in the welding of pipe fittings and flanges. Circular arc welding is a welding process in which the connection part of the workpiece is processed into an arc shape and welding is performed on this arc. Its weld is arc-shaped, which is different from the common straight weld. When performing circular arc welding, it is necessary to precisely control parameters such as welding speed, welding current, and arc length to ensure the quality and shape of the weld.

[0004] When welding flanges and pipe fittings together, the pipe fittings are first placed on the flange, and then the flange is rotated to rotate the pipe fittings together. At this time, the welding robot can weld along the circular trajectory of the pipe fittings. In order to ensure the welding quality and prevent the pipe fittings from shaking, a clamping device is needed to clamp the pipe fittings and the flange while the flange is rotating, and the clamping device rotates with the flange. However, since the welding gun tip needs to be aligned with the connection between the flange and the pipe fittings, the clamping device will interfere with the welding gun of the welding robot when the flange rotates. Therefore, the existing technology usually places the pipe fittings directly on the flange without clamping, and then slowly rotates the flange to weld. This will cause the pipe fittings to shake when the workpiece rotates, affecting the welding quality. Utility Model Content

[0005] The purpose of this invention is to provide a welding clamping fixture for a welding robot to address the aforementioned shortcomings in the prior art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a welding clamping fixture for a welding robot, comprising a worktable, on which a rotating circular plate is rotatably mounted; a first clamping mechanism, comprising a support column fixedly mounted on the rotating circular plate, wherein a plurality of external support rods for fixing the inner wall of a pipe are rotatably mounted on the support column, each of the external support rods having a sliding groove, and each of the sliding grooves having a sliding rod slidably mounted therein; and a second clamping mechanism, comprising a plurality of fixed plates fixedly mounted on the rotating circular plate, wherein each of the fixed plates has a clamping plate for clamping a flange slidably mounted thereon, and a lifting plate slidably mounted at the bottom of the rotating circular plate.

[0007] Preferably, a drive rod is fixedly provided at the bottom of the rotating circular plate, the lifting plate is slidably connected to the drive rod, a first abutting rod is fixedly provided on the lifting plate away from the rotating circular plate, and a first abutting ring is fixedly provided at the bottom of the worktable, with a first inclined groove on the first abutting ring that cooperates with the first abutting rod.

[0008] Preferably, a second abutting rod is fixedly provided on the outer periphery of the lifting plate, and a second abutting ring is fixedly provided on the bottom of the worktable, with a second inclined groove formed on the second abutting ring.

[0009] Preferably, a plurality of pull rods are fixedly provided on the lifting plate, each of the pull rods being slidably connected to the rotating circular plate, and the end of each pull rod away from the lifting plate being fixedly connected to a corresponding sliding rod.

[0010] Preferably, a second spring is fixedly provided between the lifting plate and the rotating circular plate.

[0011] Preferably, a plurality of pressing blocks are slidably arranged on the rotating circular plate, and a connecting rod is fixedly arranged on both sides of each pressing block. The end of each connecting rod away from the pressing block is fixedly connected to the lifting plate. A first spring is fixedly arranged between each fixed plate and the clamping plate in a one-to-one correspondence. A moving rod that is slidably connected to the fixed plate is fixedly arranged on the side of each clamping plate near the fixed plate.

[0012] In the above technical solution, this utility model provides a welding clamping fixture for a welding robot, which has the following beneficial effects: the lifting plate and the rotating circular plate are driven to rotate by a servo motor, thereby facilitating the welding robot to weld flanges and pipes. At the same time, when the lifting plate rotates, the first abutting ring and the second abutting ring drive the lifting plate to descend, thereby driving the outer support plate to open and abut against and fix the inner wall of the pipe, thereby preventing interference between the clamping device and the welding head when the circular pipe rotates. While the lifting plate descends, it can also drive the lower pressure block to push the clamping plate towards the flange to clamp the flange, increasing the stability of welding. Attached Figure Description

[0013] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings.

[0014] Figure 1 A schematic diagram of the overall structure provided for an embodiment of this utility model;

[0015] Figure 2 A schematic diagram of the structure of the first abutment ring provided in an embodiment of this utility model;

[0016] Figure 3 This is a schematic diagram of the structure of the pressure block provided in an embodiment of the present utility model;

[0017] Figure 4 A schematic diagram of the slide bar provided in an embodiment of this utility model;

[0018] Figure 5 This is a schematic diagram of the external support rod provided in an embodiment of the present utility model.

[0019] Explanation of reference numerals in the attached figures:

[0020] 1. Workbench; 2. Servo motor; 3. Welding robot; 4. Flange; 5. Pipe fitting; 10. Rotating circular plate; 11. Support column; 12. External support rod; 13. Slide groove; 14. Slide rod; 15. Tie rod; 16. Lifting plate; 17. Fixing plate; 18. Slide rod; 19. Clamping plate; 20. First spring; 21. Lower pressure block; 22. Inclined surface; 23. Connecting rod; 24. Drive rod; 25. First abutting rod; 26. First abutting ring; 261. First inclined groove; 27. Second abutting rod; 28. Second abutting ring; 281. Second inclined groove; 29. ​​Second spring. Detailed Implementation

[0021] To enable those skilled in the art to better understand the technical solution of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings.

[0022] Please see Figure 1-5A welding clamping fixture for a welding robot, the technical solution proposed in this utility model includes a worktable 1, on which a rotating circular plate 10 is rotatably mounted; a first clamping mechanism including a support column 11 fixedly mounted on the rotating circular plate 10, with multiple outer support rods 12 rotatably mounted on the support column 11 for fixing the inner wall of a pipe fitting 5, each outer support rod 12 having a groove 13, and each groove 13 having a sliding rod 14 slidably mounted therein; and a second clamping mechanism including multiple... Fixed plates 17, each with a slidable clamping plate 19 for holding the flange 4; a lifting plate 16 slidably mounted on the bottom of the rotating circular plate 10; a welding robot 3 is fixedly mounted on the workbench 1; there are four external support rods 12 and four fixed plates 17; the four sliding rods 14 are fixedly connected end to end to form a rectangle; one end of the external support rod 12 is rotatably connected to the middle position of the support column 11; since the flange 4 and the pipe fitting 5 are both annular, the flange 4 is placed on the rotating circular plate 10 through the support column 11 during use. The pipe fitting 5 is placed in the middle position of the support column 11 and then placed on the flange 4. At this time, the welding robot 3 is adjusted so that the welding head faces the connection position between the pipe fitting 5 and the flange 4 and welding is started. Then the rotating circular plate 10 is rotated. When the rotating circular plate 10 rotates, it first drives the lifting plate 16 to descend. The descent of the lifting plate 16 will drive the sliding rod 14 to move downward in the corresponding sliding groove 13, thereby causing the top of each outer support rod 12 to rotate away from the support column 11, so that each outer support rod 12 opens up and abuts against the inner wall of the pipe fitting 5. The pipe fitting 5 is externally supported and fixed from the inner wall of the pipe fitting 5. When the rotating circular plate 10 rotates, it will not interfere with the welding head. At the same time, when the lifting plate 16 descends, it will drive the clamping plate 19 to move closer to the flange 4, thereby clamping the flange 4. Then the welding robot 3 is started. As the rotating circular plate 10 rotates, it welds the connection between the flange 4 and the pipe fitting 5. When the welding is completed, the lifting plate 16 rises and resets, thereby resetting the slide rod 14 and the clamping plate 19, and then releasing the welded flange 4 and pipe fitting 5.

[0023] Specifically, a drive rod 24 is fixedly installed at the bottom of the rotating circular plate 10, and a lifting plate 16 is slidably connected to the drive rod 24. A first abutting rod 25 is fixedly installed on the lifting plate 16 away from the rotating circular plate 10. A first abutting ring 26 is fixedly installed at the bottom of the worktable 1, and a first inclined groove 261 that mates with the first abutting rod 25 is opened on the first abutting ring 26. A servo motor 2 is fixedly installed at the bottom of the worktable 1, and the output end of the servo motor 2 is fixedly connected to the drive rod 24. The servo motor 2 drives the drive rod 24 to rotate, thereby driving the lifting plate 16 and the rotating circular plate 10 to rotate together. Figure 2As shown, in the initial state, the first abutting rod 25 is located at the end of the first inclined groove 261 near the rotating circular plate 10. At this time, the clamping plate 19 does not clamp the circumference of the flange 4, and the outer support rod 12 is also retracted to the position near the support column 11. When in use, the servo motor 2 is started to drive the lifting plate 16 to rotate clockwise. At this time, the first abutting rod 25 moves along the first inclined groove 261 to the end of the first abutting ring 26 away from the rotating circular plate 10, thereby driving the lifting plate 16 to move away from the rotating circular plate 10, and then driving each sliding rod 14 to move downward, thereby opening the outer support rod 12. When the first abutting rod 25 abuts against the end of the first abutting ring 26, the outer support rod 12 abuts tightly against the inner wall of the pipe fitting 5 to fix the pipe fitting 5.

[0024] Specifically, a second abutment rod 27 is fixedly installed on the outer periphery of the lifting plate 16, and a second abutment ring 28 is fixedly installed on the bottom of the worktable 1. The second abutment ring 28 has a second inclined groove 281. Figure 2 As shown, in the initial state, the second abutting rod 27 is located at the end of the second inclined groove 281 near the rotating circular plate 10. The height of the second abutting ring 28 is lower than that of the first abutting ring 26. The second abutting ring 28 is located below the inner ring of the abutting ring. When the lifting plate 16 rotates clockwise, the second abutting rod 27 moves to the end of the second abutting ring 28 away from the rotating circular plate 10 through the abutting of the second abutting ring 28 and the second inclined groove 281. The cooperation of the second abutting rod 27, the second abutting ring 28, and the second inclined groove 281 makes the lifting plate 16 move with balanced force, reducing the wear between the lifting plate 16 and the drive rod 24. The first abutting rod 25 and the second abutting rod 27 are symmetrically arranged, and the first inclined groove 261 and the second inclined groove 281 are symmetrically arranged. The distance between the bottom and top of the first inclined groove 261 is equal to the distance between the bottom and top of the second inclined groove 281.

[0025] Specifically, multiple pull rods 15 are fixedly installed on the lifting plate 16. Each pull rod 15 is slidably connected to the rotating circular plate 10. The end of each pull rod 15 away from the lifting plate 16 is fixedly connected to each corresponding slide rod 14. There are also four pull rods 15. The fixed connection points of two adjacent slide rods 14 are fixedly connected to the corresponding pull rods 15. When the lifting plate 16 descends, the pull rods 15 can pull the slide rods 14 that are fixedly connected together downward together, so that the outer support rod 12 expands outward to support and fix the pipe 5.

[0026] Specifically, a second spring 29 is fixedly installed between the lifting plate 16 and the rotating circular plate 10. When the servo motor 2 drives the lifting plate 16 and the rotating circular plate 10 to rotate, the lifting plate 16 moves down through the first abutting rod 25 and the second abutting rod 27. At this time, the second spring 29 is stretched. When the first abutting rod 25 rotates one revolution and returns to the first inclined groove 261, and the second abutting rod 27 rotates one revolution and returns to the second inclined groove 281, the second spring 29 causes the lifting plate 16 to rise and reset, thereby causing the sliding rod 14 to rise and relax the inner wall of the pipe 5.

[0027] Specifically, a plurality of pressing blocks 21 are slidably arranged on the rotating circular plate 10. Each pressing block 21 has a connecting rod 23 fixedly arranged on both sides. The end of each connecting rod 23 away from the pressing block 21 is fixedly connected to the lifting plate 16. A first spring 20 is fixedly arranged between each fixed plate 17 and the clamping plate 19 in a corresponding manner. Each clamping plate 19 has a moving rod 18 fixedly arranged on the side near the fixed plate 17, which is slidably connected to the fixed plate 17. A through groove adapted to the pressing block 21 is opened at the position where the rotating circular plate 10 aligns with the pressing block 21. Each pressing block 21... The side of the pressure block 21 closest to the fixed plate 17 is provided with an inclined surface 22. In the initial state, the inclined surface 22 of the lower pressure block 21 is on the upper side of the end of the moving rod 18 away from the clamping plate 19. When the lifting plate 16 moves down, the lower pressure block 21 is driven to move down through the connecting rod 23. When the lower pressure block 21 moves down, the inclined surface 22 squeezes the moving rod 18 and the clamping plate 19 towards the flange 4 to clamp the flange 4. The clamping plate 19 has an arc that matches the outer peripheral surface of the flange. When the lifting plate 16 rises, the moving rod 18 is reset by the first spring 20.

[0028] Although embodiments of the present 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 present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A welding clamping fixture for a welding robot, comprising a worktable, characterized in that, A rotating circular plate is rotatably mounted on the workbench; The first clamping mechanism includes a support column fixedly mounted on a rotating circular plate. Multiple external support rods for fixing the inner wall of the pipe are rotatably mounted on the support column. Each external support rod is provided with a sliding groove, and a sliding rod is slidably mounted in each sliding groove. The second clamping mechanism includes multiple fixed plates fixedly mounted on a rotating circular plate. Each fixed plate is slidably mounted with a clamping plate for clamping the flange. A lifting plate is slidably mounted at the bottom of the rotating circular plate.

2. The welding clamping fixture for a welding robot according to claim 1, characterized in that, A drive rod is fixedly installed at the bottom of the rotating circular plate, and the lifting plate is slidably connected to the drive rod. A first abutting rod is fixedly installed on the lifting plate away from the rotating circular plate, and a first abutting ring is fixedly installed at the bottom of the worktable. A first inclined groove that cooperates with the first abutting rod is opened on the first abutting ring.

3. The welding clamping fixture for a welding robot according to claim 2, characterized in that, A second abutting rod is fixedly installed on the outer circumference of the lifting plate, and a second abutting ring is fixedly installed at the bottom of the workbench. The second abutting ring is provided with a second inclined groove.

4. The welding clamping fixture for a welding robot according to claim 3, characterized in that, Multiple pull rods are fixedly installed on the lifting plate, and each pull rod is slidably connected to the rotating circular plate. The end of each pull rod away from the lifting plate is fixedly connected to each corresponding sliding rod.

5. The welding clamping fixture for a welding robot according to claim 4, characterized in that, A second spring is fixedly installed between the lifting plate and the rotating circular plate.

6. The welding clamping fixture for a welding robot according to claim 5, characterized in that, Multiple pressing blocks are slidably arranged on the rotating circular plate. Each pressing block has a connecting rod fixedly arranged on both sides. The end of each connecting rod away from the pressing block is fixedly connected to the lifting plate. Each fixed plate and clamping plate is fixedly arranged with a first spring in a one-to-one correspondence. Each clamping plate has a moving rod fixedly arranged on the side close to the fixed plate and slidably connected to the fixed plate.

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