Gantry type welding machine tool for sheet metal parts

Abstract

The invention discloses a gantry type welding machine tool for sheet metal parts, and relates to the field of sheet metal welding, the gantry type welding machine tool comprises a workbench and a gantry moving frame, a laser welding mechanism is mounted on the gantry moving frame, the gantry type welding machine tool further comprises a welding auxiliary mechanism, and the welding auxiliary mechanism is arranged on one side of the laser welding mechanism and synchronously moves along with the laser welding mechanism; the welding auxiliary mechanism comprises a first downward pressing assembly, the first downward pressing assembly is used for applying pressure to the edge part of the metal plate so that the welding parts of the two metal plates can abut against each other, and the first downward pressing assembly comprises a first rolling part and a first force applying part; the first pressing wheel is pressed on the edge of one metal plate, so that the metal plate abuts against the welding position of the other metal plate, the first pressing wheel moves along with the movement of the laser welding mechanism relative to the metal plate to be welded, and the action area of the first pressing wheel changes along with the change of the position of the laser head. And the accuracy and the consistency of the welding parts of the two sheet metal parts are ensured.

Description

Technical Field

[0001] This invention relates to sheet metal welding technology, and more specifically to a gantry welding machine tool for sheet metal parts. Background Technology

[0002] In the field of mechanical manufacturing, sheet metal welding is an indispensable processing step in industries such as automobiles, aerospace, and electronic equipment. Although traditional gantry welding machine tools can achieve automated welding, the stability of sheet metal welding relies heavily on manual adjustment. The process generally involves spot welding of sheet metal followed by seam welding. During welding, manual adjustment or the use of clamping components mounted on the machine tool (most equipment uses fixed springs or cylinders to apply force) is required to adjust the contact of the welding area. Usually, after welding a certain distance, the position of the clamping area needs to be adjusted backward, meaning the welding process is intermittent. Furthermore, each interruption results in a stagnation point in the welding area, affecting the continuity and efficiency of welding. The existing welding auxiliary mechanism lacks sufficient linkage with the laser welding head. The auxiliary clamping device usually operates independently of the welding head and cannot achieve synchronous movement. This leads to displacement deviations between the clamping point and the welding point during long welds or complex trajectory welding, affecting welding accuracy. Summary of the Invention

[0003] The purpose of this invention is to provide a gantry welding machine tool for sheet metal parts to overcome the above-mentioned shortcomings in the prior art.

[0004] To achieve the above objectives, the present invention provides the following technical solution: a gantry welding machine tool for sheet metal parts, comprising a worktable and a gantry moving frame, wherein a laser welding mechanism is mounted on the gantry moving frame, and a welding auxiliary mechanism is also included. The welding auxiliary mechanism is disposed on one side of the laser welding mechanism and moves synchronously with the laser welding mechanism. The welding auxiliary mechanism includes a first pressing component, which is used to apply pressure to the edge portion of the sheet metal to make the welding parts of the two sheet metal parts abut together. The first pressing component includes a first rolling part and a first force-applying part.

[0005] Furthermore, the first rolling part includes at least one first pressure roller, which is movable along the edge of the sheet metal and abuts against the edge of the sheet metal under the action of the first force-applying part.

[0006] Furthermore, the first rolling part includes a first support frame, on which a first rotating shaft is fixedly connected, and the first rotating shaft is rotatably connected to the first pressure roller.

[0007] Furthermore, the first force-applying part includes a first bracket, and a first sliding rod is fixedly connected to the side of the first support frame away from the first pressure roller. The first sliding rod is slidably connected to the inner wall of the first bracket, and a first spring is sleeved on the first sliding rod located between the first bracket and the first support frame.

[0008] Furthermore, the first force-applying part also includes a first adjusting member, which includes a first adjusting rod and a first movable block. The first bracket has a first movable cavity for the first movable block to move. The first adjusting rod is threadedly connected to the inner wall of the first movable block. The first adjusting rod is slidably connected to the inner wall of the first bracket. One end of the first adjusting rod is rotatably connected to one side of the first support frame.

[0009] Furthermore, a groove is provided on the periphery of the first pressure roller, and the groove is adapted to the edge of the sheet metal. When the first pressure roller moves, the edge of the sheet metal is located in the groove.

[0010] Furthermore, the welding auxiliary mechanism also includes a second pressing component, which is used to apply pressure to the side portion of the sheet metal. The second pressing component includes a second rolling part and a second force-applying part. The second rolling part includes a second pressure roller, which can move along the edge of the sheet metal and abut against the side of the sheet metal under the action of the second force-applying part.

[0011] Furthermore, the second rolling part includes a second support frame, on which a second rotating shaft is fixedly connected. The second rotating shaft is rotatably connected to the second pressure roller. The second force-applying part includes a second bracket. A second sliding rod is fixedly connected to the side of the second support frame away from the second pressure roller. The second sliding rod is slidably connected to the inner wall of the second bracket. A second spring is sleeved on the second sliding rod located between the second bracket and the second support frame.

[0012] Furthermore, the second force-applying part also includes a second adjusting member, which includes a second adjusting rod and a second movable block. The second bracket has a second movable cavity for the second movable block to move. The second adjusting rod is threadedly connected to the inner wall of the second movable block. The second adjusting rod is slidably connected to the inner wall of the second bracket. One end of the second adjusting rod is rotatably connected to one side of the second support frame.

[0013] Furthermore, the first bracket and the second bracket are fixedly connected by a right-angle frame. A rotating frame is rotatably connected to one side of the right-angle frame. A locking element is provided at the rotatable connection between the rotating frame and the right-angle frame. One end of the rotating frame is fixedly connected to the mounting platform of the laser welding mechanism.

[0014] Compared with the prior art, the gantry welding machine tool for sheet metal parts provided by the present invention has the following beneficial effects: 1. Through the social welding auxiliary mechanism, during operation, the first pressure roller presses on the edge of one of the sheet metal plates, so that the welding position of the sheet metal and the other sheet metal is pressed tightly. The first pressure roller moves with the welding laser welding mechanism to the sheet metal to be welded, so that the effective area of ​​the first pressure roller changes with the position of the laser head. During the welding process, the accuracy and consistency of the welding position of the two sheet metal parts are guaranteed.

[0015] 2. Through the synergistic action of the first pressing component (edge ​​pressing) and the second pressing component (side pressing), bidirectional pressure is applied to the sheet metal parts during the welding process to ensure that the welded parts are always tightly fitted. This method is also applicable when welding sheet metal in an inclined position.

[0016] 3. The first force application section and the second force application section adopt the design of the first force application section and the second force application section respectively. By rotating the first adjusting rod or changing the compression of the first spring or the second spring, the pressure can be controlled and adjusted. The operator can flexibly adjust the force according to the thickness or material of the sheet metal, avoiding material deformation or poor contact caused by improper pressure, thus expanding the applicability of the equipment. Attached Figure Description

[0017] 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 invention. For those skilled in the art, other drawings can be obtained based on these drawings.

[0018] Figure 1 This is a schematic diagram of the overall structure provided for an embodiment of the present invention; Figure 2 Provided for embodiments of the present invention Figure 1 The front view; Figure 3 A schematic diagram of the structure of the first driving component provided in an embodiment of the present invention; Figure 4 A schematic diagram of the structure of the laser welding mechanism and welding auxiliary mechanism provided in the embodiments of the present invention; Figure 5 A partial structural schematic diagram of the laser welding mechanism provided in an embodiment of the present invention; Figure 6 This is a schematic diagram of the welding auxiliary mechanism provided in an embodiment of the present invention; Figure 7 This is a partial structural diagram of the first rolling part and the first force-applying part provided in an embodiment of the present invention; Figure 8 This is a partial structural diagram of the second rolling part and the second force-applying part provided in an embodiment of the present invention; Figure 9 This is a schematic diagram of a right-angle frame structure provided in an embodiment of the present invention; Figure 10 This is a schematic diagram of the separation state of the first rolling part and the first force-applying part provided in an embodiment of the present invention; Figure 11 This is a schematic diagram of a sheet metal part being welded in a vertical posture according to an embodiment of the present invention; Figure 12This is a schematic diagram of welding sheet metal parts in an inclined (angle α) posture according to an embodiment of the present invention.

[0019] Explanation of reference numerals in the attached figures: 1. Workbench; 11. Horizontal slide rail; 12. First drive component; 121. First gear; 122. First rack; 2. Gantry moving frame; 3. Laser welding mechanism; 31. Laser head; 32. Mounting platform; 33. Rotating component one; 34. Rotating component two; 4. Welding auxiliary mechanisms; 41. First rolling part; 411. First pressure roller; 412. First support frame; 413. First rotating shaft; 414. Groove; 42. First force-applying part; 421. First bracket; 422. First sliding rod; 423. First spring; 424. First adjusting rod; 425. First movable block; 426. First movable cavity; 43. Second rolling part; 431. Second pressure roller; 432. Second support frame; 433. Second rotating shaft; 44. Second force-applying part; 441. Second bracket; 442. Second sliding rod; 443. Second spring; 444. Second adjusting rod; 445. Second movable block; 446. Second movable cavity; 45. Right-angle bracket; 46. Rotating bracket; 47. Locking component. Detailed Implementation

[0020] To enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings. Example

[0021] Please see Figure 1 - Figure 12 A gantry welding machine tool for sheet metal parts includes a worktable 1 and a gantry frame 2, on which a laser welding mechanism 3 is mounted, and further includes: Welding auxiliary mechanism 4 is disposed on one side of laser welding mechanism 3 and moves synchronously with laser welding mechanism 3. Welding auxiliary mechanism includes a first pressing component, which is used to apply pressure to the edge part of sheet metal so that the welding parts of two sheet metal parts are pressed together. The first pressing component includes a first rolling part 41 and a first force applying part 42.

[0022] like Figure 6 As shown, the first rolling part 41 includes at least one first pressure roller 411, which can move along the edge of the sheet metal and abut against the edge of the sheet metal under the action of the first force application part 42.

[0023] Specifically, the first rolling part 41 includes a first support frame 412, on which a first rotating shaft 413 is fixedly connected. The first rotating shaft 413 is rotatably connected to the first pressure roller 411. It should be understood that the axial direction of the first rotating shaft 413 coincides with the axial direction of the first pressure roller 411.

[0024] The first force-applying part 42 includes a first bracket 421. A first sliding rod 422 is fixedly connected to the side of the first support frame 412 away from the first pressure roller 411. The first sliding rod 422 is slidably connected to the inner wall of the first bracket 421. A first spring 423 is sleeved on the first sliding rod 422 located between the first bracket 421 and the first support frame 412.

[0025] When the welding auxiliary mechanism 4 is working, the first spring 423 is always in a compressed state.

[0026] like Figure 4 As shown, when the welding auxiliary mechanism 4 is working, the first pressure roller 411 presses on the edge of one of the sheet metal plates, so that the welding position of the sheet metal and the other sheet metal is pressed together. The first pressure roller 411 moves with the welding laser welding mechanism 3 to the sheet metal to be welded, so that the effective area of ​​the first pressure roller 411 changes with the position of the laser head 31. During the welding process, the accuracy and consistency of the welding position of the two sheet metal parts are ensured. It should be noted that in some embodiments, the laser welding mechanism 3 of the gantry welding machine tool can also be fixed in the welding direction, that is, as shown in the example. Figure 1 As shown, taking the X, Y and Z directions as examples, in the X direction, the gantry moving frame 2 can move along the X direction, or the gantry moving frame 2 can be fixed at a certain position and the worktable 1 can move along the X direction. Both of these methods are acceptable. For the technical solution of the present invention, the worktable 1 and the laser welding mechanism 3 can move relative to each other in the X direction. Furthermore, the laser welding mechanism 3 can move in both the Y and Z directions, meaning it can... Figure 1 As shown, the laser head 31 of the laser welding mechanism 3 moves along the length of the gantry frame 2 and in the vertical direction (Z direction). It is mounted on the mounting platform 32 and can move vertically on the mounting platform 32. Figure 5 As shown, the laser head 31 is also connected to a rotating component 33 and a rotating component 34, so that its angle can be adjusted. The movement mode and specific structure of the laser welding mechanism 3 are existing technologies and will not be described in detail here.

[0027] In one embodiment of the present invention, such as Figure 1As shown, taking the ability of the worktable 1 to move along the X direction as an example, the worktable 1 is mounted on a horizontal slide rail 11 provided along the X direction, and it is able to move on the horizontal slide rail 11. The worktable 1 is connected to a first drive member 12 for driving it to move along the horizontal slide rail 11. In one embodiment of the present invention, the first driving member 12 includes a first motor mounted on the worktable 1. One end of the output shaft of the first motor is fixedly connected to a first gear 121. A first rack 122 is meshed with one side of the first gear 121. The first rack 122 is mounted on the horizontal slide rail 11 and is arranged along the X direction. It should be understood that, in order to ensure the stability of the movement of the worktable 1, for some worktables 1 with a relatively wide width (width along the Y direction), two first driving members 12 can be provided, respectively for two horizontal rails, and the worktable 1 can be driven to move smoothly by the synchronous drive of the first motor.

[0028] In one embodiment of the present invention, the first force-applying part 42 further includes a first adjusting member, which includes a first adjusting rod 424 and a first movable block 425. A first movable cavity 426 is provided in the first bracket 421 for the first movable block 425 to move. The first adjusting rod 424 is threadedly connected to the inner wall of the first movable block 425 and slidably connected to the inner wall of the first bracket 421. One end of the first adjusting rod 424 is rotatably connected to one side of the first support frame 412. It should be noted that the moving direction of the first movable block 425 is the axial direction of the first sliding rod 422.

[0029] The function of the first adjusting component is to adjust the compression degree of the first spring 423, so that when the first pressure roller 411 presses against the edge of the sheet metal and compresses the first spring 423 by the same distance, different forces can be obtained. In other words, by setting the first adjusting component, the force applied by the first force-applying part 42 to the edge of the sheet metal can be adjusted, which can control the degree of contact at the weld during sheet metal welding to a certain extent and avoid poor welding caused by excessive or insufficient force during contact. Specifically, see Figure 7Under normal conditions, the first movable block 425 is always in contact with the bottom of the first movable cavity 426. When the first adjusting member is adjusted (to meet the need for increased compression of the first spring 423), by rotating the first adjusting rod 424, since the first movable block 425 is in contact with the bottom of the first movable cavity 426, the first support frame 412 will move towards the first bracket 421, and the first springs 423 on both sides will be further compressed. The elastic potential energy of the springs will also increase accordingly, and the pressure required to further compress the springs after adjustment will also increase further. When the first pressure roller 411 applies further force after contacting the edge of the sheet metal part, it causes... The pressure required for the first pressure roller 411 to move relative to the first bracket 421 increases. The function of the first spring 423 is to keep the first pressure roller 411 in contact with the edge of the sheet metal part during movement and to provide a buffering effect during movement. It should be noted that the function of the first movable cavity 426 is to provide the moving space for the first movable block 425. Whether the first spring 423 is in a higher or lower compression state after the first adjusting rod 424 is rotated, the first pressure roller 411 can move relative to the first bracket 421 along with the first support frame 412, the first adjusting rod 424 and the first movable block 425.

[0030] In one embodiment of the present invention, the number of first pressure rollers 411 is preferably two, such as... Figure 4 As shown, the laser head 31 of the laser welding mechanism 3 is adjusted to the area between the two pressure rollers, which can further improve the force application range of the first pressure roller 411 and its stability during movement.

[0031] In one embodiment of the present invention, a groove 414 is provided on the circumference of the first pressure roller 411. The groove 414 is adapted to the edge of the sheet metal. When the first pressure roller 411 moves, the edge of the sheet metal is located within the groove 414. Figure 7 and Figure 11 As shown, the function of the groove 414 is to use the edge of the sheet metal as a guide for the first pressure roller 411 and to prevent the first pressure roller 411 from separating from the edge of the sheet metal during its movement and application of force.

[0032] In one embodiment of the present invention, the welding auxiliary mechanism 4 further includes a second pressing component, which is used to apply pressure to the side portion of the sheet metal. The second pressing component includes a second rolling part 43 and a second force-applying part 44. The second rolling part 43 includes a second pressure roller 431, which can move along the edge of the sheet metal and abut against the side of the sheet metal under the action of the second force-applying part 44. Specifically, the second rolling part 43 includes a second support frame 432, which is perpendicular to the first support frame 412. A second rotating shaft 433 is fixedly connected to the second support frame 432, and the second rotating shaft 433 is rotatably connected to the second pressure roller 431. The second force-applying part 44 includes a second bracket 441. A second sliding rod 442 is fixedly connected to the side of the second support frame 432 away from the second pressure roller 431. The second sliding rod 442 is slidably connected to the inner wall of the second bracket 441. A second spring 443 is sleeved on the second sliding rod 442 located between the second bracket 441 and the second support frame 432. When one sheet metal is welded at an angle relative to another sheet metal, such as Figure 12 As shown, directly applying pressure to the edge of the sheet metal through the first pressing component cannot completely solve the aforementioned problem. In some processing scenarios, the angle of sheet metal tilt will also be different. As the included angle α decreases, the effect of the first pressing component becomes worse. It may even affect the position of the sheet metal when the pressure is large. Therefore, the second pressing component mentioned above can also be set based on the first pressing component.

[0033] It should be noted that, in the case of inclined welding of sheet metal, the second spring 443 is always in a compressed state, while the first spring 423 can be in a compressed state with a lower compression amount. After setting the second pressing component, in the case of vertical welding of two sheet metals, the second pressure roller 431 can be adjusted to not apply pressure to the sheet metal.

[0034] In one embodiment of the present invention, the second force-applying part 44 further includes a second adjusting member, which includes a second adjusting rod 444 and a second movable block 445. A second movable cavity 446 is provided in the second bracket 441 for the second movable block 445 to move. The second adjusting rod 444 is threadedly connected to the inner wall of the second movable block 445 and slidably connected to the inner wall of the second bracket 441. One end of the second adjusting rod 444 is rotatably connected to one side of the second support frame 432. It should be noted that the moving direction of the second movable block 445 is the axial direction of the second sliding rod 442.

[0035] The adjustment method of the second adjusting member is the same as that of the first adjusting member, and will not be described in detail here.

[0036] In one embodiment of the present invention, the first bracket 421 and the second bracket 441 are fixedly connected by a right-angle bracket 45. A rotating frame 46 is rotatably connected to one side of the right-angle bracket 45. A locking member 47 is provided at the rotatable connection between the rotating frame 46 and the right-angle bracket 45. One end of the rotating frame 46 is fixedly connected to the mounting platform 32 of the laser welding mechanism 3. In some embodiments, the rotating frame 46 is configured to be position-adjustable on the mounting platform 32, thereby adjusting the positions of the first pressing component and the second pressing component. Figure 2As shown, generally, the mounting platform 32 has a groove, and one end of the rotating frame 46 is adjusted in position within the groove by a locking bolt. It should be noted that, based on the welding direction, the rotating frame 46 can be installed... Figure 2 The position shown (welding auxiliary mechanism 4 is located on the left side of laser head 31) can also be installed on the right side of laser head 31.

[0037] In one embodiment of the present invention, the locking member 47 can be a general bolt and nut structure, that is, it includes a bolt that passes through the rotational connection between the right-angle frame 45 and the rotating frame 46, and the end of the bolt is threaded to a nut. The side walls of the right-angle frame 45 located on both sides of the end of the rotating frame 46 can deform slightly. By tightening the nut, the two sides of the right-angle frame 45 clamp the rotating frame 46, thereby realizing the angle adjustment between the right-angle frame 45 and the rotating frame 46, so as to adapt to sheet metal welding with different tilt angles. Of course, some other structures in the prior art that achieve locking by pressing the two sides of the right-angle frame 45 can also be used.

[0038] In some embodiments, a dial can be provided between the rotating frame 46 and the mounting frame to indicate the rotation angle of the right-angle frame 45. In some implementation scenarios, by knowing the angle between the rotating frame 46 and the mounting frame in advance, the frame can be moved according to the preset welding trajectory before welding, and the accuracy of the pre-fixed sheet metal tilt angle can be tested without welding. That is, the cooperation between the first pressing component and the second pressing component can also serve as a sheet metal tilt detection function before welding.

[0039] It should be noted that when the sheet metal is welded at an angle, the first pressure roller 411 can also be fastened to the edge of the sheet metal. When the second pressure roller 431 applies greater pressure, the first pressure roller 411 also plays a role in restricting the sheet metal inside.

[0040] The foregoing has only described certain exemplary embodiments of the present invention by way of illustration. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the present invention.

Claims

1. A gantry welding machine tool for sheet metal parts, comprising a worktable (1) and a gantry moving frame (2), wherein a laser welding mechanism (3) is mounted on the gantry moving frame (2), characterized in that: It also includes a welding auxiliary mechanism (4), which is located on one side of the laser welding mechanism (3) and moves synchronously with the laser welding mechanism (3). The welding auxiliary mechanism (4) includes a first pressing component, which is used to apply pressure to the edge of the sheet metal so that the welding parts of the two sheet metal parts are pressed together. The first pressing component includes a first rolling part (41) and a first force-applying part (42).

2. A gantry welding machine tool for sheet metal parts according to claim 1, characterized in that, The first rolling part (41) includes at least one first pressure roller (411), which is capable of moving along the edge of the sheet metal and abutting against the edge of the sheet metal under the action of the first force application part (42).

3. A gantry welding machine tool for sheet metal parts according to claim 2, characterized in that, The first rolling part (41) includes a first support frame (412), on which a first rotating shaft (413) is fixedly connected, and the first rotating shaft (413) is rotatably connected to the first pressure roller (411).

4. A gantry welding machine tool for sheet metal parts according to claim 3, characterized in that, The first force-applying part (42) includes a first bracket (421). A first sliding rod (422) is fixedly connected to the side of the first support frame (412) away from the first pressure roller (411). The first sliding rod (422) is slidably connected to the inner wall of the first bracket (421). A first spring (423) is sleeved on the first sliding rod (422) located between the first bracket (421) and the first support frame (412).

5. A gantry welding machine tool for sheet metal parts according to claim 4, characterized in that, The first force-applying part (42) further includes a first adjusting member, which includes a first adjusting rod (424) and a first movable block (425). The first bracket (421) has a first movable cavity (426) for the first movable block (425) to move. The first adjusting rod (424) is threadedly connected to the inner wall of the first movable block (425). The first adjusting rod (424) is slidably connected to the inner wall of the first bracket (421). One end of the first adjusting rod (424) is rotatably connected to one side of the first support frame (412).

6. A gantry welding machine tool for sheet metal parts according to claim 2, characterized in that, The first pressure roller (411) has a groove (414) on its periphery. The groove (414) is adapted to the edge of the sheet metal. When the first pressure roller (411) moves, the edge of the sheet metal is located in the groove (414).

7. A gantry welding machine tool for sheet metal parts according to claim 1, characterized in that, The welding auxiliary mechanism (4) further includes a second pressing component, which is used to apply pressure to the side portion of the sheet metal. The second pressing component includes a second rolling part (43) and a second force-applying part (44). The second rolling part (43) includes a second pressure roller (431). The second pressure roller (431) can move along the edge of the sheet metal and abut against the side of the sheet metal under the action of the second force-applying part (44).

8. A gantry welding machine tool for sheet metal parts according to claim 7, characterized in that, The second rolling part (43) includes a second support frame (432), on which a second rotating shaft (433) is fixedly connected. The second rotating shaft (433) is rotatably connected to the second pressure roller (431). The second force-applying part (44) includes a second bracket (441). A second sliding rod (442) is fixedly connected to the side of the second support frame (432) away from the second pressure roller (431). The second sliding rod (442) is slidably connected to the inner wall of the second bracket (441). A second spring (443) is sleeved on the second sliding rod (442) located between the second bracket (441) and the second support frame (432).

9. A gantry welding machine tool for sheet metal parts according to claim 8, characterized in that, The second force-applying part (44) also includes a second adjusting member, which includes a second adjusting rod (444) and a second movable block (445). The second bracket (441) has a second movable cavity (446) in which the second movable block (445) can move. The second adjusting rod (444) is threadedly connected to the inner wall of the second movable block (445). The second adjusting rod (444) is slidably connected to the inner wall of the second bracket (441). One end of the second adjusting rod (444) is rotatably connected to one side of the second support frame (432).

10. A gantry welding machine tool for sheet metal parts according to claim 6 or 7, characterized in that, The first bracket (421) and the second bracket (441) are fixedly connected by a right-angle bracket (45). A rotating frame (46) is rotatably connected to one side of the right-angle bracket (45). A locking element (47) is provided at the rotatable connection between the rotating frame (46) and the right-angle bracket (45). One end of the rotating frame (46) is fixedly connected to the mounting platform (32) of the laser welding mechanism (3).

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