A laser-arc hybrid welding inner welding machine welding gun assembly and inner welding machine

Abstract

The application discloses a laser-arc hybrid welding inner welding machine welding gun assembly and an inner welding machine, and relates to the technical field of oil and gas pipeline welding.The welding gun assembly comprises a welding gun base, a welding wire module arranged on the welding gun base, a welding gun module and a laser welding head arranged on the welding gun base, and a dust removal pipe arranged on the welding gun base and corresponding to the laser welding head.The welding gun base comprises a first fixed plate and a second fixed plate, and the first fixed plate and the second fixed plate are arranged oppositely.A supporting shaft and a third fixed plate are fixedly installed between the first fixed plate and the second fixed plate, and the supporting shaft and the third fixed plate are arranged oppositely to the welding wire module and the dust removal pipe.In use, the laser welding head, the arc welding gun and the welding wire module are integrated and installed on the same welding gun base, the multi-heat-source structure is integrally arranged, the narrow installation space in the pipeline is adapted, and the laser-arc hybrid welding process is successfully applied to the inner root welding operation of the pipeline.

Description

Technical Field

[0001] This invention relates to the field of oil and gas pipeline welding technology, specifically to a laser-arc hybrid welding internal welding machine welding torch assembly and internal welding machine. Background Technology

[0002] Long-distance oil and gas pipelines are the core infrastructure for transporting oil and gas resources across regions. On-site construction generally adopts a segmented assembly line operation mode. Root welding, as the first key process of pipeline circumferential welding, directly determines the construction period and long-term operational safety of the entire pipeline in terms of construction speed and forming quality.

[0003] Currently, the mainstream pipe root welding processes are divided into two categories: single-arc external root welding and multi-gun internal root welding. Traditional single-arc welding is stable in operation and easy to control parameters, but its heat source energy density is low, limiting welding efficiency. External root welding is convenient to construct on the outside of the pipe, but it requires single-sided welding with double-sided forming, making it difficult to control the quality of the weld formation on the inner wall of the pipe. Existing multi-gun internal root welding relies on an internal welding machine for construction, which has fast welding speed and stable weld formation, but still has disadvantages such as thin weld layer and insufficient rigidity. Laser-arc hybrid welding technology combines the high energy density of laser with the good bridging ability of electric arc, which can significantly increase the weld penetration and improve welding adaptability. Its application in pipe internal root welding has the advantages of high welding efficiency and large weld layer thickness. Moreover, it can eliminate problems such as poor back-side formation and excessive hardness in the laser zone through subsequent remelting and reheating tempering, demonstrating good applicability.

[0004] Because traditional welding torches only have a reserved installation position for arc welding torches and no standardized installation position for laser welding heads, it is impossible to simultaneously integrate two heat sources, laser and arc, in the narrow space inside the pipe. Furthermore, the arc welding torch mounting bracket is a fixed and non-adjustable structure, and there is no angle adjustment mechanism between the arc axis and the laser beam. If a laser welding head is forcibly installed, the molten metal spatter and metal fumes generated during the welding process will continuously adhere to the laser head's light output protective lens, blocking the laser beam path, reducing the laser output energy, and affecting the welding effect. Summary of the Invention

[0005] In view of the problems existing in the prior art, the present invention is proposed.

[0006] Therefore, the purpose of this invention is to provide a welding torch assembly and an internal welding machine for laser-arc hybrid welding. The problem to be solved is that traditional welding torches do not have a laser welding head mounting position, and the narrow space inside the tube makes it difficult to integrate the dual heat sources of laser and electric arc; the arc torch bracket is fixed, and the angle between the electric arc and the laser beam cannot be adjusted, and there is no dust collection and protection structure. Welding spatter and dust can easily contaminate the laser lens, block the light path, weaken the laser energy, and degrade the welding quality.

[0007] To achieve the above objectives, the present invention provides the following technical solution: a laser arc hybrid welding internal welding machine welding torch assembly and an internal welding machine, including a welding torch base, a welding wire module provided on the welding torch base, a welding torch module and a laser welding head provided on the welding torch base, and a dust removal pipe arranged corresponding to the laser welding head on the welding torch base. The welding torch base includes a first fixing plate and a second fixing plate, and the first fixing plate and the second fixing plate are arranged opposite to each other. A support shaft and a third fixing plate are fixedly installed between the first fixing plate and the second fixing plate, and the support shaft and the third fixing plate are respectively arranged opposite to the welding wire module and the dust removal pipe. The welding gun module includes an arc-shaped guide plate, which is fixedly installed between the first and second fixed plates via a third fixing plate. A first connecting plate and a second connecting plate are detachably installed on the outside of the arc-shaped guide plate via fasteners. An arc welding gun is installed on the first connecting plate via a welding gun fixing buckle. A micro motor is fixedly installed on the second connecting plate. The micro motor is used to drive and adjust the angle between the axis of the arc welding gun and the axis of the laser beam of the laser welding head. The laser welding head is fixedly installed between the first and second fixing plates via a third fixing plate. The dust removal pipe is located beside the laser welding head, and the light-emitting end of the laser welding head is arranged facing the welding action area corresponding to the inner circumferential seam of the pipe to be welded.

[0008] As a preferred embodiment of the laser-arc hybrid welding internal welding machine welding gun assembly of the present invention, wherein: the output shaft of the micro motor is connected to a transmission gear, and the arc-shaped guide plate is provided with a tooth groove that meshes and matches the transmission gear; one end of the arc-shaped guide plate is rotatably connected to the first connecting plate through a bearing; and a slot is also provided on the side of the arc-shaped guide plate near the first connecting plate. When the micro motor drives the transmission gear to rotate along the tooth groove, it causes the first connecting plate to rotate along the arc-shaped trajectory of the arc-shaped guide plate, thereby adjusting the installation angle of the arc welding gun.

[0009] As a preferred embodiment of the laser-arc hybrid welding internal welding machine welding gun assembly of the present invention, wherein: a first locating wheel and a second locating wheel are rotatably connected to the first connecting plate, the first locating wheel abuts against the side wall of the arc-shaped guide plate near the second connecting plate, and the second locating wheel is slidably engaged in the slot.

[0010] As a preferred embodiment of the welding torch assembly of the laser-arc hybrid welding machine of the present invention, the welding wire module includes a welding wire holder, which is fixedly installed on a support shaft. A welding wire is threaded through the welding wire holder, and a welding wire clip is provided on the welding wire holder for limiting and guiding the welding wire. After the welding wire passes through the welding wire holder, it enters the arc welding torch and is transported to the welding action area by the arc welding torch.

[0011] As a preferred embodiment of the laser-arc hybrid welding machine welding gun assembly of the present invention, wherein: the first fixing plate and the second fixing plate are arranged in parallel, the inner side of the third fixing plate is provided with a pipe fixing hole adapted to the dust removal pipe, the two ends of the support shaft and the third fixing plate are respectively fixedly connected to the first fixing plate and the second fixing plate, and the first fixing plate, the second fixing plate, the support shaft and the third fixing plate together constitute the installation support frame of the welding gun assembly.

[0012] As a preferred embodiment of the welding torch assembly of the laser-arc hybrid welding machine of the present invention, wherein: the dust removal tube is inserted and fixed in the pipeline fixing hole, the other end of the dust removal tube is connected to a negative pressure suction device, the dust removal tube is located next to the laser welding head, and the suction port of the dust removal tube faces the light-emitting end of the laser welding head or the welding action area.

[0013] In a preferred embodiment of the laser-arc hybrid welding machine welding torch assembly of the present invention, the working direction of the arc welding torch and the light emission direction of the laser welding head both point towards the welding action area.

[0014] In a preferred embodiment of the laser-arc hybrid welding machine welding torch assembly of the present invention, the dust removal tube inlet and the laser emission path of the laser welding head are spaced apart to avoid blocking the laser beam.

[0015] An internal welding machine includes an internal welding machine body and a laser-arc hybrid welding internal welding machine welding gun assembly. The laser-arc hybrid welding internal welding machine welding gun assembly is fixedly assembled on the welding nozzle end of the internal welding machine and arranged in a ring array around the center of the welding nozzle end of the internal welding machine.

[0016] In summary, the present invention has at least one of the following beneficial effects: 1. This invention integrates the laser welding head, arc welding gun, and welding wire module onto the same welding gun base, achieving an integrated arrangement of multiple heat sources. This adapts to the narrow installation space inside pipelines and successfully applies the laser-arc hybrid welding process to the root welding operation inside pipelines.

[0017] 2. This invention achieves adjustable arc welding torch angle through an arc-shaped guide plate and matching adjustment structure, which can flexibly change the relative angle between the arc and the laser beam, adapt to various pipe diameters, bevels and different welding process conditions, and improve the compatibility of composite heat source coupling.

[0018] 3. In this invention, by fixing the laser welding head to the welding gun base, the laser beam emission direction remains constant during the welding process, avoiding the beam deviation problem caused by the shaking and displacement of the mechanism, and ensuring the stability of the composite heat source position.

[0019] 4. This invention, by arranging a dust removal pipe next to the laser welding head, can extract the spatter and fumes generated in the molten pool in real time during welding, greatly reducing the adhesion of contaminants to the laser optical lens, reducing the contamination and wear of the laser welding head, and extending the service life of the equipment. Attached Figure Description

[0020] 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.

[0021] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a front view of the structure of the present invention; Figure 3 This is a three-dimensional structural diagram of the welding torch assembly of the welding machine of the present invention; Figure 4 This is a structural diagram of the assembly of the arc welding gun and the laser welding head according to the present invention; Figure 5 This is a structural diagram of the welding torch base of the present invention; Figure 6 This is a schematic diagram illustrating the angle adjustment between the arc welding gun and the laser welding head according to the present invention; Figure 7 This is a three-dimensional structural diagram of the arc welding gun of the present invention; Figure 8 This is a structural diagram showing the installation of the arc-shaped guide plate and the third fixing plate according to the present invention.

[0022] Explanation of reference numerals in the attached figures: 1. Welding torch base; 11. First fixing plate; 12. Second fixing plate; 13. Support shaft; 14. Third fixing plate; 15. Pipe fixing hole; 2. Welding wire module; 21. Welding wire; 22. Welding wire holder; 23. Welding wire clip; 3. Welding torch module; 31. Arc welding torch; 32. Welding torch fixing clip; 33. First connecting plate; 331. First retaining wheel; 332. Second retaining wheel; 34. Arc guide plate; 341. Tooth groove; 342. Slot; 35. Second connecting plate; 36. Micro motor; 361. Transmission gear; 4. Laser welding head; 5. Dust removal pipe; 6. Welding pipe end of internal welding machine. Detailed Implementation

[0023] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0024] This invention discloses a laser-arc hybrid welding internal welding machine welding torch assembly and an internal welding machine.

[0025] Example, refer to Figure 1-8According to one embodiment of the present invention, a laser-arc hybrid welding internal welding machine welding torch assembly and an internal welding machine are provided. This laser-arc hybrid welding internal welding machine welding torch assembly includes a welding torch base 1, a welding wire module 2 mounted on the welding torch base 1, a welding torch module 3 and a laser welding head 4 mounted on the welding torch base 1, and a dust removal pipe 5 arranged corresponding to the laser welding head 4 on the welding torch base 1. The welding torch base 1 includes a first fixing plate 11 and a second fixing plate 12, which are arranged opposite to each other. A support shaft 13 and a third fixing plate 14 are fixedly installed between the first fixing plate 11 and the second fixing plate 12. 4 is arranged opposite to the welding wire module 2 and the dust removal pipe 5 respectively. The welding gun module 3 includes an arc-shaped guide plate 34, which is fixedly installed between the first fixed plate 11 and the second fixed plate 12 via a third fixed plate 14. A first connecting plate 33 and a second connecting plate 35 are detachably installed on the outside of the arc-shaped guide plate 34 via fasteners. An arc welding gun 31 is installed on the first connecting plate 33 via a welding gun fixing buckle 32. A micro motor 36 is fixed on the second connecting plate 35. The micro motor 36 is used to drive and adjust the angle between the axis of the arc welding gun 31 and the axis of the laser beam of the laser welding head 4. The laser welding head 4 is fixedly installed on the first fixed plate 11 via the third fixed plate 14. Between the second fixed plate 12, the dust removal pipe 5 is located beside the laser welding head 4, with the light-emitting end of the laser welding head 4 facing the welding action area corresponding to the inner circumferential seam of the pipe to be welded. The welding gun base 1 is used to fix the entire welding gun assembly on the inner welding machine body and to provide installation support for the welding wire module 2, welding gun module 3, laser welding head 4, and dust removal pipe 5. The welding wire module 2 is used to support and guide the welding wire 21 that is fed into the arc welding gun 31. The welding gun module 3 is used to output the arc heat source. The laser welding head 4 is used to output the laser beam to the welding area. The dust removal pipe 5 is located near the laser welding head 4 to absorb welding spatter and fumes. The system comprises four main functional units: Block 2, Welding Gun Module 3, Laser Welding Head 4, and Dust Collection Tube 5. It is designed to fit the confined installation space inside oil and gas pipelines. The first fixing plate 11 and the second fixing plate 12 are arranged parallel to each other to form two supporting walls. The arc-shaped guide plate 34, the first connecting plate 33, and the second connecting plate 35 constitute an angle adjustment structure. A micro motor 36 provides automated angle adjustment power, eliminating the need for manual adjustment by loosening fasteners. This allows for precise matching of the laser and arc heat source coupling angle required for different pipeline wall thicknesses, bevels, and welding processes. The laser welding head 4 is fixed without displacement, ensuring a stable laser beam output position. The dust collection tube 5 is positioned nearby to handle welding fume splashes in real time.

[0026] The output shaft of the micro motor 36 is connected to a transmission gear 361, and the arc-shaped guide plate 34 has a toothed groove 341 that meshes with the transmission gear 361. One end of the arc-shaped guide plate 34 is rotatably connected to the first connecting plate 33 via a bearing. A slot 342 is also provided on the side of the arc-shaped guide plate 34 near the first connecting plate 33. When the micro motor 36 drives the transmission gear 361 to rotate along the toothed groove 341, it drives the first connecting plate 33 to rotate along the arc-shaped trajectory of the arc-shaped guide plate 34 to adjust the installation angle of the arc welding torch 31. The output torque of the micro motor 36 is transmitted to the transmission gear 361. The transmission gear 361 and the toothed groove 341 of the arc-shaped guide plate 34 form a rack and pinion arc-shaped transmission. The bearing connection structure reduces the rotational friction between the first connecting plate 33 and the arc-shaped guide plate 34. 2. To provide a matching limiting structure, the arc welding gun 31 can be remotely and electrically adjusted in conjunction with the chuck to guide and constrain the rotation process. In the motor-driven mode, the tilt angle of the arc welding gun 31 can be adjusted, which is suitable for continuous welding operations on the production line. Alternatively, the fasteners can be manually adjusted. After the arc welding gun 31 is adjusted to the required angle, the first connecting plate 33 can be locked onto the arc-shaped guide plate 34 by bolts, nuts or other fasteners in conjunction with the second connecting plate 35, thereby maintaining the stability of the welding gun posture. This adjustable structure allows the arc welding gun 31 to adjust its posture according to different welding process requirements. For example, when the pipe wall thickness, bevel structure, welding speed or the relative position of the laser arc heat source changes, the angle between the arc welding gun 31 and the laser beam can be adjusted to achieve a better spatial coupling relationship between the arc heat source and the laser heat source, thereby improving welding stability and forming quality.

[0027] A first chuck 331 and a second chuck 332 are rotatably connected to the first connecting plate 33. The first chuck 331 abuts against the side wall of the arc-shaped guide plate 34 near the second connecting plate 35, and the second chuck 332 slides into the slot 342. The first chuck 331 and the second chuck 332 rotate synchronously with the first connecting plate 33. The first chuck 331 is close to the outer side wall of the arc-shaped guide plate 34 to limit the radial displacement of the connecting plate. The second chuck 332 is embedded in the slot 342 to limit the connecting plate to slide only along the arc-shaped trajectory, so as to avoid the arc welding gun 31 from shifting up and down or left and right during the adjustment process and ensure the relative position adjustment accuracy of the laser beam and the arc.

[0028] The welding wire module 2 includes a welding wire holder 22, which is fixedly mounted on the support shaft 13. A welding wire 21 is threaded through the welding wire holder 22, and a welding wire clip 23 is provided on the welding wire holder 22 to limit and guide the welding wire 21. After the welding wire 21 passes through the welding wire holder 22, it enters the arc welding gun 31 and is transported to the welding action area by the arc welding gun 31. The welding wire holder 22 is used to support and guide the welding wire 21 so that the welding wire 21 can enter the arc welding gun 31 along a predetermined path. The welding wire clip 23 is set on or near the welding wire holder 22 to limit the welding wire 21 and prevent the welding wire 21 from deviating or swinging significantly during the wire feeding process. By reasonably setting the installation position and tilt angle of the welding wire holder 22, the welding wire 21 can be melted in the combined heat source area formed by the laser beam and the arc, thereby ensuring a stable source of filler metal in the weld pool.

[0029] The first fixing plate 11 and the second fixing plate 12 are arranged in parallel. The inner side of the third fixing plate 14 is provided with a pipe fixing hole 15 that is compatible with the dust removal pipe 5. The two ends of the support shaft 13 and the third fixing plate 14 are fixedly connected to the first fixing plate 11 and the second fixing plate 12 respectively. The first fixing plate 11, the second fixing plate 12, the support shaft 13 and the third fixing plate 14 together constitute the installation support frame of the welding gun assembly. The first fixing plate 11 and the second fixing plate 12 can be connected to the inner welding machine body by bolt connection, welding or other fixing methods so that the welding gun assembly is stably installed at the front end of the inner welding machine. The support shaft 13 is mainly used to strengthen the overall structural rigidity of the welding gun base 1 and maintain the relative position stability between the first fixing plate 11 and the second fixing plate 12. At the same time, it serves as the fixing structure of the welding wire module 2. By setting the third fixing plate 14, multiple working parts required for composite welding can be arranged in the same installation plane or adjacent installation area, which is conducive to improving the compactness of the overall structure.

[0030] The dust removal tube 5 is inserted and fixed in the pipeline fixing hole 15. The other end of the dust removal tube 5 is connected to a negative pressure suction device. The dust removal tube 5 is located next to the laser welding head 4. The suction port of the dust removal tube 5 faces the light output end of the laser welding head 4 or the welding action area. The pipeline fixing hole 15 is used to insert, fix or limit the dust removal tube 5, or to organize and constrain other auxiliary pipelines. The pipeline fixing hole 15 can reduce the shaking of the dust removal tube 5 due to vibration during the welding process, and avoid it from affecting the normal operation of the laser welding head 4 or the welding gun module 3. The suction port is aligned with the molten pool and the lens area of ​​the laser welding head 4, which can quickly remove the metal vapor and high-temperature spatter particles generated during welding, and prevent contaminants from adhering to the protective lens of the laser welding head 4.

[0031] The working direction of the arc welding torch 31 and the light emission direction of the laser welding head 4 both point towards the welding area. The laser beam emitted by the laser welding head 4 has a high energy density, which can form a strong local heating effect in the welding area. The arc welding torch 31 has good deposition ability and gap adaptability. When used together, the two can take into account the welding penetration, welding efficiency and weld formation stability. The axis of the laser welding head 4 and the axis of the arc welding torch 31 can form a certain angle, and this angle can be changed by adjusting the position of the arc welding torch 31 without changing the position of the laser welding head 4. The laser beam emitted by the laser welding head 4 and the action direction of the arc welding torch 31 both point towards the welding area. The arc welding torch 31 can be tilted by adjusting its tilt angle through the arc guide plate 34 to maintain a preset angle between the arc welding torch 31 and the laser beam.

[0032] During the welding process, the laser beam acts on the welding area first or simultaneously to form a high energy density heating zone; the arc welding gun 31 generates an arc and melts the welding wire 21, filling the welding area. Through the coordinated cooperation between the laser welding head 4, the arc welding gun 31 and the welding wire module 2, the laser, arc and welding wire can be integrated in the root welding process of the inner circumferential seam.

[0033] The dust collection pipe 5 is spaced apart from the laser emission path of the laser welding head 4 to avoid blocking the laser beam. Since the laser welding head 4 is close to the molten pool area, metal spatter, vapor particles and fumes generated during the welding process are prone to adhere to the vicinity of the front protective component of the laser welding head 4, affecting the laser beam output quality. By setting the dust collection pipe 5 near the laser welding head 4, the possibility of contaminants accumulating near the laser welding head 4 can be reduced, the risk of optical component contamination can be reduced, and the working stability of the laser welding head 4 can be improved. By maintaining a distance between the dust collection pipe 5 and the laser beam emission path to avoid blocking the laser beam, and at the same time, the dust collection pipe 5 is oriented towards the area where welding spatter is prone to occur, so as to improve the suction effect.

[0034] An internal welding machine includes an internal welding machine body and a laser-arc hybrid welding internal welding machine welding gun assembly. The laser-arc hybrid welding internal welding machine welding gun assembly is fixedly assembled on the welding pipe end 6 of the internal welding machine and arranged in a ring array around the center of the welding pipe end 6. The welding gun assembly is installed in the internal welding machine near the pipe end to be welded. When the internal welding machine is placed inside the pipe and performs circumferential welding of the pipe, the laser welding head 4 and the arc welding gun 31 are both facing the circumferential weld area of ​​the pipe to be welded. The laser beam and the arc act together on the welding area to form a laser-arc hybrid heat source to achieve efficient welding of the pipe root weld.

[0035] During the welding process of the pipeline using this device, the welding torch assembly is fixedly installed on the welding port end 6 of the inner welding machine body at the front end of the inner welding machine body through the welding torch base 1, and the laser welding head 4 and the arc welding torch 31 are facing the inner circumferential seam area of ​​the pipeline to be welded. The welding wire 21 is inserted into the welding wire seat 22 on the support shaft 13, and the welding wire buckle 23 completes the limiting and guiding. The end of the welding wire is smoothly passed into the inside of the arc welding torch 31, establishing a stable filling metal conveying channel. The welding process can continuously supply welding wire to the molten pool. The entire welding torch base 1 is composed of a rigid support frame consisting of a first fixing plate 11, a second fixing plate 12, a support shaft 13, and a third fixing plate 14, which can resist the vibration of the pipeline movement and continuously ensure that the relative positions of the laser and arc heat source remain unchanged. Subsequently, according to the actual welding process requirements, the relative positions of the first connecting plate 33, the second connecting plate 35 and the arc guide plate 34 in the welding gun module 3 are adjusted to adjust the tilt angle of the arc welding gun 31 relative to the laser beam. The micro motor 36 is started, and the motor output shaft drives the transmission gear 361 to mesh with the tooth groove 341 of the arc guide plate 34, driving the first connecting plate 33 to rotate along the arc trajectory of the arc guide plate 34. The angle between the arc welding gun 31 and the laser beam of the laser welding head 4 is adjusted synchronously. During the adjustment process, the first chuck 331 and the second chuck 332 respectively fit against the side wall of the guide plate and are inserted into the chuck groove 342 to achieve limit and prevent deviation. After the angle reaches the standard, the motor position is locked to ensure the welding posture is stable. When the arc welding gun 31 is adjusted to the set angle, the fasteners can also be manually adjusted to lock and fix it. After welding begins, the laser welding head 4 outputs a laser beam to the welding area, and the arc welding gun 31 generates a welding arc simultaneously. The welding wire 21 is guided by the welding wire module 2 and then fed into the arc welding gun 31 on the welding gun fixing buckle 32. The arc welding gun 31 then sends it out to the welding area. The laser beam, the arc, and the molten welding wire work together to act on the circumferential seam inside the pipe. At the same time, the dust removal pipe 5 in the pipe fixing hole 15 on the third fixing plate 14 is connected to the external negative pressure suction device, which generates a suction effect on the vicinity of the laser welding head 4 and the welding area, and removes the spatter particles and fumes generated during the welding process, thereby reducing the contamination of the laser welding head 4 by the spatter. Through the above working process, the welding gun assembly can be used to realize laser-arc hybrid welding of the root weld of the inner circumferential seam of the pipeline, thereby improving welding efficiency and weld formation quality.

[0036] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A welding torch assembly for a laser-arc hybrid welding machine, characterized in that: It includes a welding torch base (1), a welding wire module (2) is provided on the welding torch base (1), a welding torch module (3) and a laser welding head (4) are also provided on the welding torch base (1), and a dust removal pipe (5) is arranged corresponding to the laser welding head (4) on the welding torch base (1). The welding torch base (1) includes a first fixing plate (11) and a second fixing plate (12), and the first fixing plate (11) and the second fixing plate (12) are arranged opposite to each other. A support shaft (13) and a third fixing plate (14) are fixedly installed between the first fixing plate (11) and the second fixing plate (12), and the support shaft (13) and the third fixing plate (14) are arranged opposite to the welding wire module (2) and the dust removal pipe (5), respectively. The welding gun module (3) includes an arc-shaped guide plate (34), and the arc-shaped guide plate (34) is fixedly installed between the first fixed plate (11) and the second fixed plate (12) by a third fixed plate (14). The arc-shaped guide plate (34) is detachably installed with a first connecting plate (33) and a second connecting plate (35) by fasteners. The first connecting plate (33) is equipped with an arc welding gun (31) by a welding gun fixing buckle (32). The second connecting plate (35) is fixed with a micro motor (36). The micro motor (36) is used to drive and adjust the angle between the axis of the arc welding gun (31) and the laser beam axis of the laser welding head (4). The laser welding head (4) is fixedly installed between the first fixing plate (11) and the second fixing plate (12) by the third fixing plate (14). The dust removal pipe (5) is located next to the laser welding head (4), and the light-emitting end of the laser welding head (4) is arranged facing the welding action area corresponding to the inner circumferential seam of the pipe to be welded.

2. The laser-arc hybrid welding internal welding machine welding torch assembly according to claim 1, characterized in that, The output shaft of the micro motor (36) is connected to a transmission gear (361), and the arc-shaped guide plate (34) is provided with a tooth groove (341) that meshes with the transmission gear (361). One end of the arc-shaped guide plate (34) is rotatably connected to the first connecting plate (33) through a bearing. The side of the arc-shaped guide plate (34) near the first connecting plate (33) is also provided with a slot (342). When the micro motor (36) drives the transmission gear (361) to mesh and rotate along the tooth groove (341), it drives the first connecting plate (33) to rotate along the arc-shaped trajectory of the arc-shaped guide plate (34) to adjust the installation angle of the arc welding gun (31).

3. The laser-arc hybrid welding internal welding machine welding torch assembly according to claim 2, characterized in that, The first connecting plate (33) is rotatably connected to a first chuck (331) and a second chuck (332). The first chuck (331) fits against the side wall of the arc-shaped guide plate (34) near the second connecting plate (35), and the second chuck (332) slides into the slot (342).

4. The laser-arc hybrid welding internal welding machine welding torch assembly according to claim 2, characterized in that, The welding wire module (2) includes a welding wire holder (22), which is fixedly installed on the support shaft (13). A welding wire (21) is threaded through the welding wire holder (22), and a welding wire clip (23) is provided on the welding wire holder (22) to limit and guide the welding wire (21). After the welding wire (21) passes out from the welding wire holder (22), it enters the arc welding gun (31) and is transported to the welding action area by the arc welding gun (31).

5. The laser-arc hybrid welding internal welding machine welding torch assembly according to claim 1, characterized in that, The first fixing plate (11) and the second fixing plate (12) are arranged in parallel. The inner side of the third fixing plate (14) is provided with a pipe fixing hole (15) that is compatible with the dust removal pipe (5). The two ends of the support shaft (13) and the third fixing plate (14) are fixedly connected to the first fixing plate (11) and the second fixing plate (12) respectively. The first fixing plate (11), the second fixing plate (12), the support shaft (13) and the third fixing plate (14) together constitute the installation support frame of the welding gun assembly.

6. The laser-arc hybrid welding internal welding machine welding torch assembly according to claim 5, characterized in that, The dust removal pipe (5) is inserted and fixed in the pipe fixing hole (15). The other end of the dust removal pipe (5) is connected to a negative pressure suction device. The dust removal pipe (5) is located next to the laser welding head (4). The suction port of the dust removal pipe (5) faces the light output end of the laser welding head (4) or the welding action area.

7. The laser-arc hybrid welding internal welding machine welding torch assembly according to claim 5, characterized in that, The working direction of the arc welding gun (31) and the light emission direction of the laser welding head (4) both point towards the welding action area.

8. The laser-arc hybrid welding internal welding machine welding torch assembly according to claim 5, characterized in that, The dust removal pipe (5) intake port and the laser emission path of the laser welding head (4) are arranged at intervals to avoid blocking the laser beam.

9. An internal welding machine, characterized in that, The inner welding machine includes the inner welding machine body and the laser-arc hybrid welding inner welding machine welding gun assembly as described in any one of claims 1 to 8. The laser-arc hybrid welding inner welding machine welding gun assembly is fixedly assembled on the welding pipe end (6) of the inner welding machine and arranged in a ring array around the center of the welding pipe end (6) of the inner welding machine.

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