Composite welding head

Abstract

The invention relates to a composite welding head, and relates to the technical field of composite welding, the composite welding head comprises a main arm provided with a laser welding head, a protective plate is fixedly arranged on the side wall of the main arm, and a z-axis adjusting knob and a y-axis adjusting knob are rotationally arranged on the front face of the protective plate; a sliding rail is fixedly arranged on the side wall of the main arm in the z-axis direction, a sliding block is arranged on the sliding rail in a sliding mode, and a first transmission assembly is arranged on the sliding rail. A sliding frame is arranged on the sliding block in a sliding mode in the y-axis direction, and a second transmission assembly is arranged on the sliding block; a mounting frame is slidably arranged on the sliding frame in the x-axis direction, an x-axis adjusting knob and an included angle adjusting knob are rotatably arranged on the front face of the mounting frame, and a third transmission assembly is arranged on the mounting frame; an electric arc welding gun is rotationally mounted on the mounting frame, and a fourth transmission assembly is arranged on the mounting frame. The composite welding head has the effects that the problem that the adjusting positions of a common composite welding head are scattered is solved, and the welding head adjusting convenience and efficiency are improved.

Description

Technical Field

[0001] The present application relates to the technical field of composite welding, and in particular to a composite welding joint. Background Art

[0002] As a new type of welding method, laser arc hybrid welding has the characteristics of improving energy utilization, increasing weld penetration, improving welding efficiency, reducing workpiece assembly requirements, improving weld quality, and improving weld formation. It has been rapidly developed in the aerospace, shipbuilding, and automotive industries. According to different control methods, suitable laser arc hybrid welding heads can realize multiple welding methods such as laser welding, laser wire welding, laser arc hybrid welding, and arc welding, thereby increasing the application range of the equipment.

[0003] The laser arc hybrid welding head in the related technology mostly includes a laser welding head and an arc welding gun. In actual use, the spatial position between the laser welding head and the arc welding gun (i.e., the x-axis interval, y-axis interval, z-axis interval, and angle) needs to be adjusted frequently. However, the adjustment positions of common hybrid welding heads are scattered. When adjusting, the operator needs to frequently change the standing angle to adjust the x-axis, y-axis, z-axis, and angle between the laser welding head and the arc welding gun, respectively. The operation is cumbersome and the adjustment efficiency is low. Summary of the invention

[0004] In order to improve the problem of inconvenient operation caused by the dispersed adjustment positions of common composite welding heads and to improve the convenience and efficiency of welding head adjustment, the present application provides a composite welding head.

[0005] The composite welding joint provided in this application adopts the following technical solution: A composite welding head comprises a main arm provided with a laser welding head, a guard plate is fixedly provided on the side wall of the main arm, and a z-axis adjustment knob and a y-axis adjustment knob are rotatably provided on the front face of the guard plate; a slide rail is fixedly provided on the side wall of the main arm along the z-axis direction, a slider is slidably provided on the slide rail, a first transmission assembly is provided on the slide rail, and the z-axis adjustment knob drives the slider to slide through the first transmission assembly; a slide rack is slidably provided on the slider along the y-axis direction, a second transmission assembly is provided on the slider, and the y-axis adjustment knob drives the slide rack to slide through the second transmission assembly; a mounting frame is slidably provided on the slide rack along the x-axis direction, an x-axis adjustment knob and an angle adjustment knob are rotatably provided on the front face of the mounting frame, a third transmission assembly is provided on the mounting frame, and the x-axis adjustment knob drives the mounting frame to slide through the third transmission assembly; an arc welding gun is rotatably installed on the mounting frame, a fourth transmission assembly is provided on the mounting frame, and the angle adjustment knob drives the arc welding gun to rotate through the fourth transmission assembly.

[0006] By adopting the above technical solution, when it is necessary to adjust the spatial position between the laser welding head and the arc welding gun, the z-axis adjustment knob is rotated from the front of the composite welding head, and the z-axis adjustment knob drives the slider to slide along the z-axis direction through the first transmission component, thereby adjusting the z-axis position of the arc welding gun; the y-axis adjustment knob is rotated from the front of the composite welding head, and the y-axis adjustment knob drives the slide to slide along the y-axis direction through the second transmission component to achieve the y-axis position adjustment of the arc welding gun; the x-axis adjustment knob is rotated from the front of the composite welding head, and the x-axis adjustment knob drives the mounting frame to slide along the x-axis direction through the third transmission component to complete the x-axis position adjustment of the arc welding gun; Turn the angle adjustment knob on the front of the composite welding joint, and the angle adjustment knob drives the arc welding gun to rotate through the fourth transmission assembly to adjust the angle between the laser welding head and the arc welding gun; the z-axis adjustment knob, y-axis adjustment knob, x-axis adjustment knob, and angle adjustment knob are all arranged on the front of the composite welding head. Through this centralized and convenient layout, the operator does not need to frequently change the standing angle, and can quickly adjust the relative position of the laser welding head and the arc welding gun, which greatly improves the efficiency and convenience of adjustment and meets the requirements of different welding processes and welding needs. At the same time, this centralized adjustment design also reduces operational errors that may be caused by scattered adjustment positions.

[0007] Preferably, the first transmission assembly includes a first screw rod, which is rotatably disposed in the slide rail, is coaxially connected to the z-axis adjustment knob, and is threadedly connected to the slider.

[0008] By adopting the above technical solution, when the z-axis adjustment knob is rotated, the z-axis adjustment knob drives the first screw rod to rotate, and the first screw rod cooperates with the slider thread to drive the slider to move along the z-axis direction in the slide rail, thereby realizing the adjustment of the slider position, and the first screw rod can directly lock the slider.

[0009] Preferably, the second transmission assembly includes a rotating shaft, a first bevel gear, a second bevel gear, and a second screw. The rotating shaft is rotatably set on the guard plate and is coaxially connected to the y-axis adjustment knob. The first bevel gear is rotatably set on the front of the slider. The first bevel gear is slidably matched with the rotating shaft. The second bevel gear is rotatably set on the slider. The axis of the second bevel gear is parallel to the y-axis. The second bevel gear is meshed with the first bevel gear. The second screw is coaxially connected to the second bevel gear, and the second screw is threadedly meshed with the slide.

[0010] By adopting the above technical solution, when the y-axis adjustment knob is rotated, the rotating shaft is driven to rotate, the rotating shaft drives the first bevel gear to rotate, and the first bevel gear drives the second bevel gear that is meshed with each other to rotate. Since the second bevel gear is coaxially connected to the second screw rod, the second screw rod rotates accordingly, and the second screw rod is threadedly meshed with the slide, thereby driving the slide to slide along the y-axis direction, and the second screw rod can directly lock the slide; and when the z-axis position of the slider changes, the first bevel gear and the second bevel gear slide with the slider, and the meshing state can still be guaranteed, and the first bevel gear slides on the rotating shaft, and the first bevel gear will not affect the y-axis adjustment knob through the rotating shaft.

[0011] Preferably, the rotating shaft is provided with a guide groove along the length direction, a guide block is fixedly provided inside the first bevel gear, the guide block is inserted into the guide groove and abuts against the side wall of the guide groove, and the guide block and the guide groove are slidably matched.

[0012] By adopting the above technical solution, when the rotating shaft rotates, the first bevel gear can be driven to rotate through the guide groove and the guide block. When the z-axis position of the slider changes, the guide block can slide in the guide groove to ensure that the first bevel gear can slide flexibly on the rotating shaft, thereby ensuring the reliability and stability of the transmission, so that the sliding adjustment of the slide in the y-axis direction can be carried out stably.

[0013] Preferably, the third transmission assembly includes a spur gear and a rack, the spur gear is rotatably arranged in the mounting frame, the spur gear is coaxially connected to the x-axis adjustment knob, the rack is fixedly arranged on the slide along the x-axis direction, and the spur gear and the rack are meshed with each other.

[0014] By adopting the above technical solution, when the x-axis adjustment knob is rotated, the spur gear coaxially connected thereto rotates accordingly, and the spur gear engages with the rack, driving the mounting frame to move linearly along the x-axis direction relative to the slide, thereby realizing the position adjustment of the mounting frame in the x-axis direction, thereby meeting different welding requirements.

[0015] Preferably, a first friction sleeve is fixedly and slidably provided on the x-axis adjustment knob, a protrusion is provided on the back side of the first friction sleeve, a first thrust spring is provided between the first friction sleeve and the x-axis adjustment knob, one end of the first thrust spring is abutted against the x-axis adjustment knob, and the other end of the first thrust spring is abutted against the first friction sleeve, and the first thrust spring drives the protruding portion of the first friction sleeve to abut against the mounting frame.

[0016] By adopting the above technical solution, under the action of the first thrust spring, the first thrust spring will automatically drive the first friction sleeve to resist the mounting bracket, thereby increasing the friction between the x-axis adjustment knob and the mounting bracket, so that the x-axis adjustment knob has a certain self-locking ability after being adjusted into place, preventing the x-axis adjustment knob from accidentally rotating due to external interference or vibration, thereby ensuring the stability and accuracy of the mounting bracket in the x-axis direction position adjustment; when it is necessary to rotate the x-axis adjustment knob, hold the x-axis adjustment knob, with the palm against the x-axis adjustment knob, and the fingers holding the back side of the first friction sleeve, the first friction sleeve overcomes the elastic force of the first thrust spring and moves away from the mounting bracket, and the x-axis adjustment knob can rotate freely at this time.

[0017] Preferably, the fourth transmission assembly includes a driving pulley, a driven pulley, and a transmission belt, the driving pulley is coaxially connected to the angle adjustment knob, the driven pulley is coaxially connected to the arc welding gun, the transmission belt is arranged for transmission between the driving pulley and the driven pulley, one end of the transmission belt is sleeved on the driving pulley, and the other end of the transmission belt is sleeved on the driven pulley.

[0018] By adopting the above technical solution, when the angle adjustment knob is turned, the driving pulley rotates accordingly, and the driving pulley drives the driven pulley to rotate through the transmission belt. Since the driven pulley is coaxially connected to the arc welding gun, the rotation adjustment of the arc welding gun is realized.

[0019] Preferably, a second friction sleeve is fixedly and slidably provided on the angle adjustment knob, a protrusion is provided on the back side of the second friction sleeve, a second thrust spring is provided between the second friction sleeve and the angle adjustment knob, one end of the second thrust spring is against the angle adjustment knob, and the other end of the second thrust spring is against the second friction sleeve, and the second thrust spring drives the protruding part of the second friction sleeve to abut against the mounting frame.

[0020] By adopting the above technical solution, under the action of the second thrust spring, the second thrust spring will automatically drive the second friction sleeve to resist the mounting bracket, thereby increasing the friction between the angle adjustment knob and the mounting bracket, so that the angle adjustment knob has a certain self-locking ability after being adjusted into place, preventing the angle adjustment knob from accidentally rotating due to external interference or vibration and other factors, thereby ensuring the stability and accuracy of the mounting bracket in the angle direction position adjustment; when it is necessary to rotate the angle adjustment knob, hold the angle adjustment knob, with the palm against the angle adjustment knob, and the fingers holding the back side of the second friction sleeve, the second friction sleeve overcomes the elastic force of the second thrust spring and moves away from the mounting bracket, and the angle adjustment knob can rotate freely at this time.

[0021] Preferably, a composite gas nozzle group is provided at the end of the arc welding gun, and the composite gas nozzle group includes a shielding gas nozzle, and the shielding gas nozzle is used for spraying shielding gas.

[0022] By adopting the above technical solution, during the welding process, the shielding gas ejected from the shielding gas nozzle can effectively isolate the air, prevent the welding area from being oxidized, and improve the welding quality. At the same time, the shielding gas can also reduce the pores and inclusions in the weld, enhance the mechanical properties of the weld, and improve the reliability of the welded joint.

[0023] Preferably, the composite gas nozzle group further comprises a metal steam nozzle, and the metal steam nozzle is used for spraying metal steam.

[0024] By adopting the above technical scheme, the metal vapor ejected from the metal vapor nozzle can improve the stability and energy distribution of the welding arc, increase the uniformity of the weld depth and weld width, make the weld formation more beautiful, and the addition of metal vapor helps to refine the weld structure and further improve the comprehensive performance of the weld.

[0025] In summary, the present application includes at least one of the following beneficial technical effects: 1. By setting the z-axis adjustment knob, y-axis adjustment knob, x-axis adjustment knob, angle adjustment knob, and the first transmission assembly, second transmission assembly, third transmission assembly, and fourth transmission assembly for transmission on the front of the hybrid welding head, the operator does not need to frequently change the standing angle and can quickly adjust the relative position of the laser welding head and the arc welding gun; 2. By setting the first friction sleeve, the first thrust spring, the second friction sleeve, and the second thrust spring, the x-axis adjustment knob and the angle adjustment knob are self-locked to prevent the adjustment knob from accidentally rotating due to external interference or vibration; 3. By setting up a composite gas nozzle group, a shielding gas nozzle, and a metal steam nozzle, the stability and energy distribution of the welding arc are improved, the uniformity of the weld depth and weld width is increased, and the weld formation is made more beautiful. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a structural schematic diagram of a composite welding joint provided in an embodiment of the present application.

[0027] Figure 2 It is a schematic diagram of the cross-sectional structure of a composite welding joint provided in an embodiment of the present application.

[0028] Figure 3 yes Figure 2 Enlarged view of part A.

[0029] Figure 4 It is a structural schematic diagram of the back side of a composite welding head provided in an embodiment of the present application.

[0030] Figure 5 It is a schematic diagram of the cross-sectional structure of the composite gas nozzle group in the embodiment of the present application.

[0031] Description of reference numerals: 1. main arm; 2. guard plate; 21. z-axis adjustment knob; 22. y-axis adjustment knob; 23. slide rail; 24. slider; 25. slide rack; 3. mounting rack; 31. x-axis adjustment knob; 311. first friction sleeve; 312. first thrust spring; 32. angle adjustment knob; 321. second friction sleeve; 322. second thrust spring; 33. arc welding gun; 331. compound gas nozzle assembly; 3311 , protective gas nozzle; 3312, metal steam nozzle; 4, first transmission assembly; 41, first screw rod; 5, second transmission assembly; 51, rotating shaft; 511, guide groove; 52, first bevel gear; 521, guide block; 53, second bevel gear; 54, second screw rod; 6, third transmission assembly; 61, spur gear; 62, rack; 7, fourth transmission assembly; 71, driving pulley; 72, driven pulley; 73, transmission belt. DETAILED DESCRIPTION

[0032] The following is combined with Figure 1-5 This application is described in further detail.

[0033] The present application embodiment discloses a composite welding joint. Figure 1 and Figure 2 It includes a main arm 1 provided with a laser welding head, and a z-axis adjustment knob 21, a y-axis adjustment knob 22, an x-axis adjustment knob 31, and an angle adjustment knob 32 located on the front of the composite welding head. A guard plate 2 is fixedly provided on the side wall of the main arm 1, and the z-axis adjustment knob 21 and the y-axis adjustment knob 22 are rotatably provided on the front of the guard plate 2.

[0034] Reference Figure 1 and Figure 2 A slide rail 23 is fixedly provided on the side wall of the main arm 1 along the z-axis direction, the slide rail 23 is fixedly connected to the guard plate 2, and a slider 24 is slidably provided on the slide rail 23. A first transmission assembly 4 is also provided on the slide rail 23, and the z-axis adjustment knob 21 drives the slider 24 to slide through the first transmission assembly 4. The first transmission assembly 4 includes a first screw rod 41. The first screw rod 41 is rotatably provided in the slide rail 23, the end of the first screw rod 41 passes through the guard plate 2 and is coaxially connected to the z-axis adjustment knob 21, and the first screw rod 41 is threadedly connected to the slider 24. When the z-axis adjustment knob 21 is rotated, the first screw rod 41 rotates accordingly, and drives the slider 24 to move in the slide rail 23 along the z-axis direction, and the first screw rod 41 can directly lock the slider 24.

[0035] Reference Figures 1 to 4, a carriage 25 is provided on the slider 24 to slide along the y-axis direction, a second transmission assembly 5 is provided on the slider 24, and the y-axis adjustment knob 22 drives the carriage 25 to slide through the second transmission assembly 5. The second transmission assembly 5 includes a rotating shaft 51, a first bevel gear 52, a second bevel gear 53, and a second screw 54. The rotating shaft 51 is rotatably provided on the guard plate 2 and is coaxially connected with the y-axis adjustment knob 22, the first bevel gear 52 is rotatably provided on the front of the slider 24, and the first bevel gear 52 is slidably matched with the rotating shaft 51. A guide groove 511 is provided on the rotating shaft 51 along the length direction, a guide block 521 is fixedly provided inside the first bevel gear 52, the guide block 521 is inserted into the guide groove 511 and abuts against the side wall of the guide groove 511, and the guide block 521 is slidably matched with the guide groove 511. The second bevel gear 53 is rotatably provided on the slider 24, the axis of the second bevel gear 53 is parallel to the y-axis, and the second bevel gear 53 and the first bevel gear 52 are meshed with each other. The second screw rod 54 is coaxially connected to the second bevel gear 53 , and the second screw rod 54 is threadedly engaged with the slide 25 .

[0036] Reference Figures 2 to 4 When the y-axis adjustment knob 22 is turned, the rotating shaft 51 rotates accordingly, and drives the first bevel gear 52 to rotate through the guide groove 511 and the guide block 521. The first bevel gear 52 drives the second bevel gear 53 that meshes with each other to rotate, thereby driving the second screw rod 54 to rotate accordingly, and the second screw rod 54 is threadedly engaged with the slide 25, thereby driving the slide 25 to slide along the y-axis direction. And the second screw rod 54 can directly lock the slide 25.

[0037] Reference Figure 1 and Figure 2 , a mounting frame 3 is slidably arranged on the slide 25 along the x-axis direction, an x-axis adjustment knob 31 and an angle adjustment knob 32 are rotatably arranged on the front of the mounting frame 3, a third transmission assembly 6 is arranged on the mounting frame 3, and the x-axis adjustment knob 31 drives the mounting frame 3 to slide through the third transmission assembly 6. The third transmission assembly 6 includes a spur gear 61 and a rack 62, the spur gear 61 is rotatably arranged in the mounting frame 3, the spur gear 61 is coaxially connected with the x-axis adjustment knob 31, the rack 62 is fixedly arranged on the slide 25 along the x-axis direction, and the spur gear 61 and the rack 62 are meshed with each other. When the x-axis adjustment knob 31 is rotated, the spur gear 61 rotates accordingly, and the meshing of the spur gear 61 and the rack 62 drives the linear movement of the mounting frame 3 relative to the slide 25 along the x-axis direction.

[0038] Reference Figure 3, a first friction sleeve 311 is fixedly provided on the x-axis adjustment knob 31, and a slidable first friction sleeve 311 is provided on the back side of the first friction sleeve 311, and a rubber pad is provided on the convex part of the first friction sleeve 311. A first thrust spring 312 is provided between the first friction sleeve 311 and the x-axis adjustment knob 31, and one end of the first thrust spring 312 abuts against the x-axis adjustment knob 31, and the other end abuts against the first friction sleeve 311. The first thrust spring 312 is in a compressed state and drives the convex part of the first friction sleeve 311 to abut against the mounting frame 3. When the x-axis adjustment knob 31 needs to be rotated, hold the x-axis adjustment knob 31, abut the palm against the x-axis adjustment knob 31, hold the back side of the first friction sleeve 311 with the fingers and apply force, so that the first friction sleeve 311 is away from the mounting frame 3 and then rotate the x-axis adjustment knob 31. When the x-axis adjustment knob 31 is loosened, the first thrust spring 312 automatically drives the first friction sleeve 311 to abut against the mounting bracket 3, thereby increasing the friction between the x-axis adjustment knob 31 and the mounting bracket 3, thereby achieving automatic locking of the x-axis adjustment knob 31.

[0039] Reference Figure 2 and Figure 4 , an arc welding gun 33 is rotatably mounted on the mounting frame 3, and a fourth transmission assembly 7 is provided on the mounting frame 3, and the angle adjustment knob 32 drives the arc welding gun 33 to rotate through the fourth transmission assembly 7. The fourth transmission assembly 7 includes a driving pulley 71, a driven pulley 72, and a transmission belt 73. The driving pulley 71 is coaxially connected to the angle adjustment knob 32, and the driven pulley 72 is coaxially connected to the arc welding gun 33. The transmission belt 73 is arranged between the driving pulley 71 and the driven pulley 72 for transmission, and one end of the transmission belt 73 is sleeved on the driving pulley 71, and the other end of the transmission belt 73 is sleeved on the driven pulley 72. When the angle adjustment knob 32 is rotated, the driving pulley 71 rotates accordingly, and the driving pulley 71 drives the driven pulley 72 to rotate through the transmission belt 73, thereby realizing the rotation adjustment of the arc welding gun 33.

[0040] Reference Figure 3, a second friction sleeve 321 is fixedly provided on the angle adjustment knob 32, and a protrusion is provided on the back side of the second friction sleeve 321, and a rubber pad is provided on the protrusion of the second friction sleeve 321. A second thrust spring 322 is provided between the second friction sleeve 321 and the angle adjustment knob 32, and one end of the second thrust spring 322 abuts against the angle adjustment knob 32, and the other end abuts against the second friction sleeve 321. The second thrust spring 322 is in a compressed state and drives the protrusion of the second friction sleeve 321 to abut against the mounting bracket 3. When the angle adjustment knob 32 needs to be rotated, hold the angle adjustment knob 32, the palm of the hand abuts against the angle adjustment knob 32, and the fingers hold the back side of the second friction sleeve 321 and apply force to move the second friction sleeve 321 away from the mounting bracket 3 before rotating the angle adjustment knob 32. When the angle adjustment knob 32 is released, the second thrust spring 322 automatically drives the second friction sleeve 321 to abut against the mounting bracket 3, thereby increasing the friction between the angle adjustment knob 32 and the mounting bracket 3, thereby achieving automatic locking of the angle adjustment knob 32.

[0041] In order to improve the quality of weld formation, refer to Figure 1 and Figure 5 The end of the arc welding gun 33 is provided with a composite gas nozzle group 331, and the composite gas nozzle group 331 includes a shielding gas nozzle (3311) and a metal steam nozzle (3312). The shielding gas nozzle (3311) is used to spray shielding gas, and the metal steam nozzle (3312) is used to spray metal steam. During the welding process, the shielding gas sprayed by the shielding gas nozzle (3311) can effectively isolate the air, prevent the welding area from being oxidized, and improve the welding quality. The metal steam sprayed by the metal steam nozzle (3312) can improve the stability and energy distribution of the welding arc, improve the uniformity of the penetration depth and penetration width of the weld, and make the weld shape more beautiful.

[0042] The implementation principle of a composite welding head in an embodiment of the present application is as follows: the z-axis adjustment knob 21, the y-axis adjustment knob 22, the x-axis adjustment knob 31, and the angle adjustment knob 32 are all arranged on the front of the composite welding head. Through this centralized and convenient layout, the operator does not need to frequently change the standing angle, and can quickly adjust the relative position of the laser welding head and the arc welding gun 33, which greatly improves the efficiency and convenience of adjustment.

[0043] When the z-axis adjustment knob 21 is turned, the first screw 41 rotates accordingly, and drives the slider 24 to slide along the z-axis direction on the slide rail 23, thereby realizing the z-axis direction adjustment of the arc welding gun 33. When the y-axis adjustment knob 22 is turned, the rotating shaft 51 rotates accordingly, and drives the first bevel gear 52 to rotate through the guide groove 511 and the guide block 521. The first bevel gear 52 drives the second bevel gear 53 that meshes with each other to rotate, thereby driving the second screw 54 to rotate accordingly, and the second screw 54 is threadedly engaged with the slide 25, thereby driving the slide 25 to slide along the y-axis direction, thereby realizing the y-axis direction adjustment of the arc welding gun 33. When the x-axis adjustment knob 31 is turned, the spur gear 61 rotates accordingly, and the spur gear 61 is engaged with the rack 62 to drive the mounting frame 3 to move along the x-axis direction, thereby realizing the x-axis direction adjustment of the arc welding gun 33. When the angle adjustment knob 32 is rotated, the driving pulley 71 rotates accordingly, and the driving pulley 71 drives the driven pulley 72 to rotate through the transmission belt 73, thereby achieving the angle adjustment between the arc welding gun 33 and the laser welding head.

[0044] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A composite welding head, comprising a main arm (1) provided with a laser welding head, characterized in that: A guard plate (2) is fixedly arranged on the side wall of the main arm (1), and a z-axis adjustment knob (21) and a y-axis adjustment knob (22) are rotatably arranged on the front of the guard plate (2); a slide rail (23) is fixedly arranged on the side wall of the main arm (1) along the z-axis direction, a slider (24) is slidably arranged on the slide rail (23), a first transmission component (4) is arranged on the slide rail (23), and the z-axis adjustment knob (21) drives the slider (24) to slide through the first transmission component (4); a slide rack (25) is slidably arranged on the slider (24) along the y-axis direction, a second transmission component (5) is arranged on the slider (24), and the y-axis adjustment knob (22) is driven by the slider (24) to slide. The slide (25) is driven to slide via a second transmission assembly (5); a mounting frame (3) is provided on the slide (25) for sliding along the x-axis direction; an x-axis adjustment knob (31) and an angle adjustment knob (32) are rotatably provided on the front of the mounting frame (3); a third transmission assembly (6) is provided on the mounting frame (3); the x-axis adjustment knob (31) drives the mounting frame (3) to slide via the third transmission assembly (6); an arc welding gun (33) is rotatably installed on the mounting frame (3); a fourth transmission assembly (7) is provided on the mounting frame (3); the angle adjustment knob (32) drives the arc welding gun (33) to rotate via the fourth transmission assembly (7).

2. A composite welding joint according to claim 1, characterized in that: The first transmission assembly (4) comprises a first screw rod (41), the first screw rod (41) is rotatably arranged in the slide rail (23), the first screw rod (41) is coaxially connected to the z-axis adjustment knob (21), and the first screw rod (41) is threadedly connected to the slider (24).

3. The composite welding joint according to claim 1, characterized in that: The second transmission assembly (5) comprises a rotating shaft (51), a first bevel gear (52), a second bevel gear (53), and a second screw rod (54); the rotating shaft (51) is rotatably arranged on the guard plate (2) and is coaxially connected to the y-axis adjustment knob (22); the first bevel gear (52) is rotatably arranged on the front of the slider (24); the first bevel gear (52) and the rotating shaft (51) are slidably matched; the second bevel gear (53) is rotatably arranged on the slider (24); the axis of the second bevel gear (53) is parallel to the y-axis; the second bevel gear (53) and the first bevel gear (52) are meshed with each other; the second screw rod (54) is coaxially connected to the second bevel gear (53); and the second screw rod (54) is threadedly meshed with the slide (25).

4. A composite welding joint according to claim 3, characterized in that: The rotating shaft (51) is provided with a guide groove (511) along the length direction; a guide block (521) is fixedly arranged inside the first bevel gear (52); the guide block (521) is inserted into the guide groove (511) and abuts against the side wall of the guide groove (511); the guide block (521) and the guide groove (511) are slidably matched.

5. The composite welding joint according to claim 1, characterized in that: The third transmission assembly (6) comprises a spur gear (61) and a rack (62); the spur gear (61) is rotatably arranged in the mounting frame (3); the spur gear (61) is coaxially connected to the x-axis adjustment knob (31); the rack (62) is fixedly arranged on the slide (25) along the x-axis direction; the spur gear (61) and the rack (62) are meshed with each other.

6. The composite welding joint according to claim 1, characterized in that: A first friction sleeve (311) is fixedly and slidably arranged on the x-axis adjustment knob (31), a protrusion is arranged on the back side of the first friction sleeve (311), a first thrust spring (312) is arranged between the first friction sleeve (311) and the x-axis adjustment knob (31), one end of the first thrust spring (312) abuts against the x-axis adjustment knob (31), and the other end of the first thrust spring (312) abuts against the first friction sleeve (311), and the first thrust spring (312) drives the protruding portion of the first friction sleeve (311) to abut against the mounting frame (3).

7. The composite welding joint according to claim 1, characterized in that: The fourth transmission assembly (7) comprises a driving pulley (71), a driven pulley (72), and a transmission belt (73); the driving pulley (71) is coaxially connected to the angle adjustment knob (32); the driven pulley (72) is coaxially connected to the arc welding gun (33); the transmission belt (73) is arranged between the driving pulley (71) and the driven pulley (72); one end of the transmission belt (73) is sleeved on the driving pulley (71); and the other end of the transmission belt (73) is sleeved on the driven pulley (72).

8. The composite welding joint according to claim 1, characterized in that: A second friction sleeve (321) is fixedly and slidably arranged on the angle adjustment knob (32), a protrusion is arranged on the back side of the second friction sleeve (321), a second thrust spring (322) is arranged between the second friction sleeve (321) and the angle adjustment knob (32), one end of the second thrust spring (322) abuts against the angle adjustment knob (32), and the other end of the second thrust spring (322) abuts against the second friction sleeve (321), and the second thrust spring (322) drives the protruding part of the second friction sleeve (321) to abut against the mounting frame (3).

9. The composite welding joint according to claim 1, characterized in that: A composite gas nozzle group (331) is provided at the end of the arc welding gun (33); the composite gas nozzle group (331) comprises a shielding gas nozzle (3311); and the shielding gas nozzle (3311) is used for spraying shielding gas.

10. A composite welding joint according to claim 9, characterized in that: The composite gas nozzle group (331) further comprises a metal steam nozzle (3312), wherein the metal steam nozzle (3312) is used for spraying metal steam.

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