Magnesium alloy laser-electric arc hybrid welding device and method based on filament double-micro-arc collaborative matching

Abstract

The invention relates to the technical field of laser welding, in particular to a magnesium alloy laser-electric arc hybrid welding device and method based on filament double-micro-arc cooperative matching. The magnesium alloy laser-electric arc hybrid welding device comprises a bottom plate, a clamping mechanism is arranged at the upper end of the bottom plate, a magnesium alloy plate is clamped through the clamping mechanism, and a U-shaped supporting frame is fixedly connected to the upper end of the bottom plate; a cross rod is movably connected to the inner side of the U-shaped supporting frame, and a multi-source composite laser welding head is fixedly connected to one side of the cross rod; welding wires are guided and conveyed through the guiding mechanism, the surfaces of the welding wires entering the fine wire micro arc welding gun are cleaned through the cleaning mechanism, and the surfaces of the welding wires cleaned through the cleaning mechanism are dried through the drying mechanism. The composite laser emitted by the multi-source composite laser welding head is used for melting the two welding wires synchronously extending out, the two magnesium alloy plates are welded together through the molten welding wires, and the problem that the welding effect is affected when many foreign matter is attached to the surfaces of the welding wires is solved.

Description

Technical Field

[0001] The present invention relates to the technical field of laser welding, and in particular to a magnesium alloy laser-arc composite welding device and method based on synergistic matching of fine wires and double micro-arcs. Background Art

[0002] For example, the Chinese patent with announcement number CN118357581A discloses an H-beam laser arc hybrid welding device, including an H-beam support mechanism, a welding support mechanism and a welding mechanism. The H-beam support mechanism includes a base, the upper surface of the base is fixedly connected to a bottom plate, a cylinder is provided on the side of the bottom plate, a movable plate is fixedly connected to the telescopic end of the cylinder, the upper surface of the bottom plate is fixedly connected to a T-plate, and the upper surface of the T-plate is provided with an H-beam plate, the welding support mechanism includes a support plate, and the upper surface plate of the support plate is fixedly connected to a limiting plate.

[0003] However, the above scheme has the following shortcomings: in the above patent, by setting an H-shaped steel support mechanism, a welding support mechanism and a welding mechanism, it is convenient to perform single-sided welding of the H-shaped steel plate to achieve the effect of double-sided forming, reduce the number of flipping times and improve welding efficiency, but when in use, due to external environment and other reasons, when a lot of foreign matter is attached to the surface of the welding wire, such as oil, dust, moisture or other pollutants, these foreign matter make the welding wire easy to form pores after welding, affecting the strength of the weld, or form impurities floating on the surface of the weld, forming welding slag or residue, affecting the appearance of the weld. For this reason, we introduce a magnesium alloy laser-arc hybrid welding device and method based on fine wire double micro-arc coordinated matching. Summary of the invention

[0004] The object of the present invention is to provide a magnesium alloy laser-arc hybrid welding device and method based on fine wire double micro-arc cooperative matching to solve the problems raised in the above background technology.

[0005] To achieve the above object, the present invention provides the following technical solutions: A magnesium alloy laser-arc hybrid welding device based on fine wire double micro-arc cooperative matching comprises a bottom plate, a clamping mechanism is provided at the upper end of the bottom plate, and a magnesium alloy plate is clamped by the clamping mechanism, a U-shaped support frame is fixedly connected to the upper end of the bottom plate, a cross bar is movably connected to the inner side of the U-shaped support frame, and a multi-source composite laser welding head is fixedly connected to one side of the cross bar, and the multi-source composite laser welding head is respectively connected to a fiber laser and a semiconductor laser through a transmission optical fiber, so that the multi-source composite laser welding head emits a composite laser; A fine-wire micro-arc welding gun is provided on both sides of the multi-source composite laser welding head, the fine-wire micro-arc welding gun is fixedly connected to the cross bar, a through hole is provided in the fine-wire micro-arc welding gun, a plurality of guiding and conveying mechanisms are provided in the fine-wire micro-arc welding gun, the welding wire is guided and conveyed by the guiding mechanisms, and a cleaning mechanism is provided in the fine-wire micro-arc welding gun, the surface of the welding wire entering the fine-wire micro-arc welding gun is cleaned by the cleaning mechanism; The fine-wire micro-arc welding gun is provided with a drying mechanism, through which the surface of the welding wire cleaned by the cleaning mechanism is dried; two T-shaped positioning plates are fixedly connected to the upper end of the cross bar, and a welding wire disk is sleeved on the outer side of the T-shaped positioning plate; a rubber cleaning ring is fixedly installed at one end of the fine-wire micro-arc welding gun.

[0006] Preferably, the clamping mechanism includes a T-shaped clamping plate, the lower end of the T-shaped clamping plate is slidably connected in a first slide groove, the first slide groove is opened in the upper end of the base plate, a screw rod is threaded in the T-shaped clamping plate, the screw rod is movably connected in the first slide groove, one end of the screw rod extends into the external environment and is fixedly connected to the handwheel.

[0007] Preferably, the guiding and conveying mechanism includes a first connecting cavity, which is connected to the through hole, and two U-shaped connecting blocks are arranged in the first connecting cavity, and the upper and lower ends of the U-shaped connecting block are fixedly connected to the limiting blocks, and the limiting blocks are slidably connected to the limiting grooves, and the limiting grooves are opened in the first connecting cavity, and the inner sides of the two U-shaped connecting blocks are movable with transmission guide wheels, and the outer sides of the transmission guide wheels are recessed, and a micro motor is fixedly installed in the U-shaped connecting block, and the output end of the micro motor is fixedly connected to the transmission guide wheel, and one end of the U-shaped connecting block is fixedly connected to a support spring, and the other end of the support spring is fixedly connected to the first connecting cavity.

[0008] Preferably, the cleaning mechanism includes a cavity, which is opened in the fine-wire micro-arc welding gun, and a cleaning cloth belt is arranged in the cavity, a rubber tooth plate is fixedly connected to the outer side of the cleaning cloth belt, and a T-shaped rubber ring is fixedly connected to the outer side of the rubber tooth plate, and a C-shaped cavity is opened in the fine-wire micro-arc welding gun, and the C-shaped cavity is connected to the cavity, and scraper rods are arranged on the upper and lower sides of the C-shaped cavity, and the two ends of the scraper rod on the upper side are respectively fixedly connected to a slide plate, and the slide plate is slidably connected to a second slide groove, and the second slide groove is opened in the C-shaped cavity, and an electromagnet is arranged on the upper side of the slide plate, and the electromagnet is fixedly installed in the fine-wire micro-arc welding gun, and the two ends of the scraper rod on the lower side are fixedly connected to the C-shaped cavity, and a cleaning liquid is arranged in the lower side of the C-shaped cavity.

[0009] Preferably, a toothed roller is movably connected to the lower side of the C-shaped cavity, the toothed roller is meshed with the rubber toothed plate, one end of the toothed roller is fixedly connected to a pulley, the pulley is connected to another pulley through a belt, the other pulley is fixedly connected to the output end of the transmission motor, and the transmission motor is fixedly installed in the fine-wire micro-arc welding gun.

[0010] Preferably, three U-shaped plates are provided in the cavity, a T-shaped rubber ring is slidably connected in the U-shaped plate, one end of the U-shaped plate away from the T-shaped rubber ring is fixedly connected to a T-shaped rod, one end of the T-shaped rod is slidably connected in the second connecting cavity, the second connecting cavity is opened in the fine-wire micro-arc welding gun, a connecting spring is sleeved on the outside of the T-shaped rod, one end of the connecting spring is fixedly connected to the second connecting cavity, and the other end is fixedly connected to the T-shaped rod.

[0011] Preferably, the drying mechanism comprises a through cavity, a heating plate and a fan are fixedly connected in the through cavity, and filters are fixedly connected at both ends of the through cavity.

[0012] Preferably, a connecting motor is fixedly connected inside the upper end of the cross bar, and the output end of the connecting motor is fixedly connected to a T-shaped lead screw, and the T-shaped lead screw is screwed into the U-shaped support frame.

[0013] In addition, in order to achieve the above-mentioned purpose, the present invention also provides an arc hybrid welding method, which is used in the above-mentioned fine wire double micro-arc coordinated matching magnesium alloy laser-arc hybrid welding device, comprising: S1. Place two magnesium alloy plates on the upper end of the bottom plate so that the gap between the two magnesium alloy plates is located at the lower side of the multi-source composite laser welding head, clamp the two magnesium alloy plates by a clamping mechanism, install the welding wire into the fine wire micro-arc welding gun, guide the welding wire of the conveying mechanism for conveying, turn on two electromagnets to make the scraper pull the cleaning cloth belt, and the cleaning cloth belt wound in the cavity is tightened and fits the surface of the welding wire; S2. The surface of the welding wire is cleaned by a moving cleaning cloth belt. When the cleaning cloth belt moves to the lower side of the C-shaped cavity, it contacts the cleaning liquid. The cleaning cloth belt is cleaned with the cooperation of the scraper rod and the cleaning liquid on the lower side. The cleaned welding wire is driven by the guide conveying mechanism to enter the drying mechanism to dry the surface of the welding wire. S3. Turn on the multi-source composite laser welding head to convert the lasers emitted by the fiber laser and the semiconductor laser into composite lasers for emission. The composite laser emitted by the multi-source composite laser welding head melts the two synchronously extended welding wires, and the two magnesium alloy plates are welded together using the melted welding wires.

[0014] Compared with the prior art, the beneficial effects of the present invention are as follows: two magnesium alloy plates are clamped by a clamping mechanism, and the welding wire is guided and conveyed by a guiding mechanism. When the welding wire moves to the position of a cleaning mechanism under the conveyance of the guiding and conveying mechanism, the surface of the welding wire entering the fine-wire micro-arc welding gun is cleaned by the cleaning mechanism, so that the oil and impurities on the surface of the welding wire are cleaned off, and the surface of the welding wire cleaned by the cleaning mechanism is dried by a drying mechanism. The composite laser emitted by a multi-source composite laser welding head melts the two synchronously extended welding wires, and the two magnesium alloy plates are welded together by the melted welding wire, thereby solving the problem of affecting the welding effect when a large amount of foreign matter is attached to the surface of the welding wire. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the cross-sectional structure of the present invention; Figure 2 It is a schematic cross-sectional structure diagram of a fine-wire micro-arc welding gun of the present invention; Figure 3 For the present invention Figure 2 The enlarged cross-sectional structure diagram at A in the middle; Figure 4 This is a cross-sectional structural schematic diagram of the connection relationship between the electromagnet and the slide plate of the present invention; Figure 5 This is a schematic diagram of the cross-sectional structure of the C-shaped cavity position of the present invention; Figure 6 This is a schematic cross-sectional view of the welding wire installation state of the present invention; Figure 7 It is a schematic cross-sectional view of the cleaning cloth tape of the present invention in a wound state; Figure 8 It is a schematic diagram of a three-dimensional cross-sectional structure of the cleaning cloth tape of the present invention in a wound state; Fig. 9 It is a schematic diagram of the three-dimensional structure of the fine-wire micro-arc welding gun of the present invention.

[0016] In the figure: 1, bottom plate; 2, U-shaped support frame; 3, hand wheel; 4, T-shaped clamping plate; 5, lead screw; 6, first slide slot; 7, fine wire micro-arc welding gun; 8, cross bar; 9, connecting motor; 10, gear roller; 11, welding wire reel; 12, C-shaped cavity; 13, multi-source composite laser welding head; 14, scraper rod; 15, T-shaped lead screw; 16, T-shaped positioning plate; 17, slide plate; 18, heating plate; 19, through hole; 20, filter screen; 21, fan; 22, second slide slot; 2 3. Cavity; 24. Transmission motor; 25. Electromagnet; 26. Pulley; 27. Micro motor; 28. First connecting cavity; 29. ​​Rubber cleaning ring; 30. Transmission guide wheel; 31. U-shaped connecting block; 32. Support spring; 33. Limiting groove; 34. Limiting block; 35. Through cavity; 36. Rubber tooth plate; 37. Belt; 38. U-shaped plate; 39. Connecting spring; 40. Second connecting cavity; 41. T-bar; 42. T-shaped rubber ring; 43. Cleaning cloth belt. DETAILED DESCRIPTION

[0017] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0018] See also Figure 1-9 , the present invention provides a technical solution: Embodiment 1: A magnesium alloy laser-arc hybrid welding device based on fine wire double micro-arc coordinated matching comprises a base plate 1, a clamping mechanism is provided at the upper end of the base plate 1, two magnesium alloy plates are placed on the upper end of the base plate 1, and the joint of the two magnesium alloy plates is arranged on the lower side of the multi-source composite laser welding head 13, the magnesium alloy plates are clamped by the clamping mechanism, a U-shaped support frame 2 is fixedly connected to the upper end of the base plate 1, a cross bar 8 is movably connected to the inner side of the U-shaped support frame 2, both ends of the cross bar 8 are fixedly connected to T-shaped limit blocks, a T-shaped limit groove is provided on the inner side of the U-shaped support frame 2, the cross bar 8 is limited by the T-shaped limit block slidingly connected to the T-shaped limit groove, so that the cross bar 8 can move up and down stably; A multi-source composite laser welding head 13 is fixedly connected to one side of the crossbar 8. The multi-source composite laser welding head 13 is respectively connected to the fiber laser and the semiconductor laser through transmission optical fibers, so that the multi-source composite laser welding head 13 emits composite lasers. The multi-source composite laser welding head 13 is turned on to convert the lasers emitted by the fiber laser and the semiconductor laser into composite lasers for emission. The composite laser emitted by the multi-source composite laser welding head 13 is used to melt the two synchronously extended welding wires, and the two magnesium alloy plates are welded together by the melted welding wires. A fine wire micro-arc welding gun 7 is provided on both sides of the multi-source composite laser welding head 13. The fine wire micro-arc welding gun 7 is fixedly connected to the cross bar 8. A through hole 19 is provided in the fine wire micro-arc welding gun 7. A plurality of guiding and conveying mechanisms are provided in the fine wire micro-arc welding gun 7. One end of the welding wire is placed into the through hole 19. The welding wire is guided and conveyed by the guiding mechanism. A cleaning mechanism is provided in the fine wire micro-arc welding gun 7. When the welding wire moves to the position of the cleaning mechanism under the conveyance of the guiding and conveying mechanism, the surface of the welding wire entering the fine wire micro-arc welding gun 7 is cleaned by the cleaning mechanism, so that the oil and impurities on the surface of the welding wire are cleaned; A drying mechanism is provided in the fine-wire micro-arc welding gun 7. After the cleaning mechanism cleans the welding wire, there will be a certain amount of moisture on the surface of the welding wire. The drying mechanism is used to dry the surface of the welding wire after being cleaned by the cleaning mechanism. Two T-shaped positioning disks 16 are fixedly connected to the upper end of the cross bar 8. A welding wire disk 11 is sleeved on the outer side of the T-shaped positioning disk 16. A rubber cleaning ring 29 is fixedly installed at one end of the fine-wire micro-arc welding gun 7. Since the rubber cleaning ring 29 has a certain elastic force, when the welding wire passes through the rubber cleaning ring 29, the rubber cleaning ring 29 will fit with the surface of the welding wire. When the welding wire moves into the fine-wire micro-arc welding gun 7 driven by the guiding and conveying mechanism, the rubber cleaning ring 29 will scrape off large particles of impurities on the surface of the welding wire.

[0019] Embodiment 2: On the basis of embodiment 1, in order to enable welding wires of different diameters to be transported, the clamping mechanism includes a T-shaped clamping plate 4, the lower end of the T-shaped clamping plate 4 is slidably connected to the first slide groove 6, the first slide groove 6 is opened in the upper end of the bottom plate 1, a screw rod 5 is screwed in the T-shaped clamping plate 4, the screw rod 5 is movably connected to the first slide groove 6, one end of the screw rod 5 extends into the external environment and is fixedly connected to the hand wheel 3, two magnesium alloy plates are placed on the upper end of the bottom plate 1, after the placement is completed, the hand wheel 3 is turned to drive the screw rod 5 to start rotating, and the rotation of the screw rod 5 drives the T-shaped clamping plate 4 to move, and the two magnesium alloy plates are clamped by the two T-shaped clamping plates 4, and at the same time, the gap between the two magnesium alloy plates is located on the lower side of the multi-source composite laser welding head 13; The guiding and conveying mechanism includes a first connecting cavity 28, which is connected to the through hole 19. Two U-shaped connecting blocks 31 are arranged in the first connecting cavity 28. The upper and lower ends of the U-shaped connecting blocks 31 are fixedly connected to the limiting blocks 34. The limiting blocks 34 are slidably connected to the limiting grooves 33. The limiting grooves 33 are arranged in the first connecting cavity 28. The inner sides of the two U-shaped connecting blocks 31 are movable with transmission guide wheels 30. The outer sides of the transmission guide wheels 30 are concavely arranged. The micro motor 27 is fixedly installed in the U-shaped connecting block 31. The micro motor 27 outputs The outlet end is fixedly connected to the transmission guide wheel 30, one end of the U-shaped connection block 31 is fixedly connected to a support spring 32, and the other end of the support spring 32 is fixedly connected to the first connection chamber 28. When the welding wire enters between the two transmission guide wheels 30, the U-shaped connection block 31 will be pushed to move outward, and the U-shaped connection block 31 will drive the limit block 34 to move along the limit groove 33 when moving, and the support spring 32 will be compressed at the same time. Under the elastic force of the support spring 32, the two transmission guide wheels 30 are always in contact with the surface of the welding wire; The cleaning mechanism includes a cavity 23, which is opened in the fine wire micro-arc welding gun 7, and a cleaning cloth belt 43 is arranged in the cavity 23. Figure 8 As shown, a cleaning cloth belt 43 is wound and arranged in the cavity 23, a rubber tooth plate 36 is fixedly connected to the outside of the cleaning cloth belt 43, a T-shaped rubber ring 42 is fixedly connected to the outside of the rubber tooth plate 36, a C-shaped cavity 12 is opened in the fine wire micro-arc welding gun 7, the C-shaped cavity 12 is connected to the cavity 23, scrapers 14 are arranged on the upper and lower sides of the C-shaped cavity 12, the two ends of the upper scraper rod 14 are fixedly connected to the slide plate 17, the slide plate 17 is slidably connected to the second slide groove 22, the second slide groove 22 is opened in the C-shaped cavity 12, an electromagnet 25 is arranged on the upper side of the slide plate 17, and the electromagnet 25 It is fixedly installed in the fine wire micro-arc welding gun 7, and the two ends of the lower scraper rod 14 are fixedly connected to the C-shaped cavity 12. A cleaning liquid is provided in the lower side of the C-shaped cavity 12. The rubber tooth plate 36 rotates to drive the cleaning cloth belt 43 to move synchronously. The surface of the welding wire is cleaned by the moving cleaning cloth belt 43. The cleaned cleaning cloth belt 43 contacts the cleaning liquid when it moves to the lower side of the C-shaped cavity 12. The surface of the cleaning cloth belt 43 is cleaned with the cooperation of the lower scraper rod 14 and the cleaning liquid. The upper scraper rod 14 can further scrape off the moisture on the surface of the cleaning cloth belt 43. A toothed roller 10 is movably connected to the lower side of the C-shaped cavity 12, and the toothed roller 10 is meshed with the rubber toothed plate 36. A pulley 26 is fixedly connected to one end of the toothed roller 10, and the pulley 26 is connected to another pulley 26 through a belt 37. The other pulley 26 is fixedly connected to the output end of the transmission motor 24, and the transmission motor 24 is fixedly installed in the fine wire micro-arc welding gun 7. When the transmission motor 24 is turned on, the pulley 26 connected thereto starts to rotate, and the pulley 26 drives another pulley 26 to start rotating through the belt 37. The rotation of the other pulley 26 drives the toothed roller 10 to start rotating, and at this time, the rubber toothed plate 36 meshed with the toothed roller 10 will start to move; Three U-shaped plates 38 are provided in the cavity 23, and a T-shaped rubber ring 42 is slidably connected in the U-shaped plate 38. One end of the U-shaped plate 38 away from the T-shaped rubber ring 42 is fixedly connected to a T-shaped rod 41, and one end of the T-shaped rod 41 is slidably connected to the second connecting cavity 40. The second connecting cavity 40 is opened in the fine wire micro-arc welding gun 7. A connecting spring 39 is sleeved on the outer side of the T-shaped rod 41, and one end of the connecting spring 39 is fixedly connected to the second connecting cavity 40, and the other end is fixedly connected to the T-shaped rod 41. When the electromagnet 25 is turned off, under the elastic force of the connecting spring 39, the T-shaped rod 41 will move into the second connecting cavity 40. The three U-shaped plates 38 are respectively arranged on the left and right sides and the front side of the cavity 23. The three U-shaped plates 38 move synchronously to pull apart the cleaning cloth belts 43 that are entangled together, so that the welding wire can pass through the cleaning cloth belts 43 that are entangled together. The drying mechanism includes a through cavity 35, in which a heating plate 18 and a fan 21 are fixedly connected, and filters 20 are fixedly connected at both ends of the through cavity 35. The cleaned welding wire will enter the through cavity 35 driven by the guiding and conveying mechanism, and the fan 21 located in the through cavity 35 will guide the external air into the through cavity 35. The air entering the through cavity 35 will be heated by the heating plate 18, and the heated air is blown onto the surface of the welding wire to dry the welding wire. A connecting motor 9 is fixedly connected to the upper end of the cross bar 8, and the output end of the connecting motor 9 is fixedly connected to the T-type screw rod 15, which is screwed into the U-shaped support frame 2. By opening the connecting motor 9, the T-type screw rod 15 connected to its output end starts to rotate. Since the T-type screw rod 15 is screwed into the U-shaped support frame 2, the cross bar 8 will move up and down during the rotation of the T-type screw rod 15.

[0020] In addition, in order to achieve the above-mentioned purpose, the present invention also provides an arc hybrid welding method, which is used for the above-mentioned fine wire double micro-arc coordinated matching magnesium alloy laser-arc hybrid welding device, comprising: S1. Place two magnesium alloy plates on the upper end of the bottom plate 1 so that the gap between the two magnesium alloy plates is located at the lower side of the multi-source composite laser welding head 13, clamp the two magnesium alloy plates by a clamping mechanism, install the welding wire into the fine wire micro-arc welding gun 7, guide the welding wire of the conveying mechanism for conveying, turn on the two electromagnets 25 so that the scraper rod 14 pulls the cleaning cloth belt 43, and the cleaning cloth belt 43 wound in the cavity 23 is tightened and fits the surface of the welding wire; S2, the surface of the welding wire is cleaned by the moving cleaning cloth belt 43, and the cleaning cloth belt 43 after cleaning contacts with the cleaning liquid when it moves to the lower side of the C-shaped cavity 12, and the cleaning cloth belt 43 is cleaned with the cooperation of the scraper rod 14 and the cleaning liquid on the lower side, and the welding wire after cleaning enters the drying mechanism under the drive of the guiding conveying mechanism, and the surface of the welding wire is dried; S3. Turn on the multi-source composite laser welding head 13 to convert the lasers emitted by the fiber laser and the semiconductor laser into composite lasers for emission. The composite laser emitted by the multi-source composite laser welding head 13 melts the two synchronously extended welding wires, and the two magnesium alloy plates are welded together using the melted welding wires.

[0021] Working principle: when in use, two magnesium alloy plates are placed on the upper end of the bottom plate 1. After placement, the hand wheel 3 is turned to drive the screw rod 5 to start rotating. The rotation of the screw rod 5 drives the T-shaped clamping plate 4 to move. The two magnesium alloy plates are clamped by the two T-shaped clamping plates 4. At the same time, the gap between the two magnesium alloy plates is located on the lower side of the multi-source composite laser welding head 13. The welding wire reel 11 is placed on the upper end of the T-shaped positioning plate 16. After placement, the welding wire is installed in the fine wire micro-arc welding gun 7. Specifically, the micro motor 27 is turned on to drive the transmission guide wheel 30 connected to its output end to start rotating, so that the two transmission guide wheels 30 in each guide conveying mechanism rotate; One end of the welding wire is passed through the rubber cleaning ring 29 and extended into the through hole 19. When one end of the welding wire contacts the two transmission guide wheels 30 rotating in opposite directions, the two transmission guide wheels 30 will transport the welding wire. Under the transmission of the guiding conveying mechanism, the welding wire passes through the cleaning cloth belt 43 and the through cavity 35 in turn and finally extends out of the fine wire micro-arc welding gun 7. At this time, the two electromagnets 25 are turned on to attract the slide plate 17. The two slide plates 17 move upward to pull the scraper rod 14 connected thereto. The scraper rod 14 moves to pull the cleaning cloth belt 43, so that the cleaning cloth belt 43 wound in the cavity 23 is tightened and fits the surface of the welding wire. The transmission motor 24 is turned on to drive the pulley 26 connected thereto to start rotating. The pulley 26 drives another pulley 26 to start rotating through the belt 37. The rotation of the other pulley 26 drives the toothed roller 10 to start rotating. At this time, the rubber toothed plate 36 meshing with the toothed roller 10 will start moving. The rubber tooth plate 36 rotates to drive the cleaning belt 43 to move synchronously, and the moving cleaning belt 43 cleans the surface of the welding wire. The cleaning belt 43 contacts the cleaning liquid when it moves to the lower side of the C-shaped cavity 12. The scraper rod 14 on the lower side and the cleaning liquid cooperate to clean the surface of the cleaning belt 43. The scraper rod 14 on the upper side can further scrape off the moisture on the surface of the cleaning belt 43. The cleaned welding wire will enter the through cavity 35 driven by the guiding and conveying mechanism. The fan 21 located in the through cavity 35 will guide the external air into the through cavity 35. The air entering the through cavity 35 will be heated by the heating plate 18, and the heated air will be blown onto the surface of the welding wire to dry the welding wire. The multi-source composite laser welding head 13 is turned on to convert the lasers emitted by the fiber laser and the semiconductor laser into composite lasers for emission. The composite laser emitted by the multi-source composite laser welding head 13 is used to melt the two synchronously extended welding wires, and the two magnesium alloy plates are welded together using the melted welding wires.

[0022] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A magnesium alloy laser-arc hybrid welding device based on fine wire double micro-arc cooperative matching, comprising a base plate, characterized in that: The upper end of the bottom plate is provided with a clamping mechanism, through which the magnesium alloy plate is clamped, the upper end of the bottom plate is fixedly connected to a U-shaped support frame, the inner side of the U-shaped support frame is movably connected to a cross bar, one side of the cross bar is fixedly connected to a multi-source composite laser welding head, the multi-source composite laser welding head is respectively connected to a fiber laser and a semiconductor laser through a transmission optical fiber, so that the multi-source composite laser welding head emits a composite laser; A fine-wire micro-arc welding gun is provided on both sides of the multi-source composite laser welding head, the fine-wire micro-arc welding gun is fixedly connected to the cross bar, a through hole is provided in the fine-wire micro-arc welding gun, a plurality of guiding and conveying mechanisms are provided in the fine-wire micro-arc welding gun, the welding wire is guided and conveyed by the guiding mechanisms, and a cleaning mechanism is provided in the fine-wire micro-arc welding gun, the surface of the welding wire entering the fine-wire micro-arc welding gun is cleaned by the cleaning mechanism; The fine-wire micro-arc welding gun is provided with a drying mechanism, through which the surface of the welding wire cleaned by the cleaning mechanism is dried; two T-shaped positioning plates are fixedly connected to the upper end of the cross bar, and a welding wire disk is sleeved on the outer side of the T-shaped positioning plate; a rubber cleaning ring is fixedly installed at one end of the fine-wire micro-arc welding gun.

2. The magnesium alloy laser-arc hybrid welding device based on fine wire double micro-arc coordinated matching according to claim 1 is characterized in that: The clamping mechanism includes a T-shaped clamping plate, the lower end of which is slidably connected to a first slide groove, the first slide groove is opened in the upper end of the bottom plate, a screw rod is threaded in the T-shaped clamping plate, the screw rod is movably connected to the first slide groove, one end of the screw rod extends into the external environment and is fixedly connected to the handwheel.

3. The magnesium alloy laser-arc hybrid welding device based on fine wire double micro-arc coordinated matching according to claim 1 is characterized in that: The guiding and conveying mechanism includes a first connecting cavity, which is connected to the through hole, and two U-shaped connecting blocks are arranged in the first connecting cavity. The upper and lower ends of the U-shaped connecting block are fixedly connected to the limiting blocks, and the limiting blocks are slidably connected to the limiting grooves. The limiting grooves are arranged in the first connecting cavity. Transmission guide wheels are movable on the inner sides of the two U-shaped connecting blocks, and the outer sides of the transmission guide wheels are recessed. A micro motor is fixedly installed in the U-shaped connecting block, and the output end of the micro motor is fixedly connected to the transmission guide wheel. One end of the U-shaped connecting block is fixedly connected to a support spring, and the other end of the support spring is fixedly connected to the first connecting cavity.

4. The magnesium alloy laser-arc hybrid welding device and method based on fine wire double micro-arc coordinated matching according to claim 1 is characterized in that: The cleaning mechanism includes a cavity, which is opened in the fine-wire micro-arc welding gun. A cleaning cloth belt is arranged in the cavity. A rubber tooth plate is fixedly connected to the outer side of the cleaning cloth belt. A T-shaped rubber ring is fixedly connected to the outer side of the rubber tooth plate. A C-shaped cavity is opened in the fine-wire micro-arc welding gun. The C-shaped cavity is connected to the cavity. Scraper rods are arranged on the upper and lower sides of the C-shaped cavity. The two ends of the scraper rod on the upper side are respectively fixedly connected to a slide plate. The slide plate is slidably connected to a second slide groove. The second slide groove is opened in the C-shaped cavity. An electromagnet is arranged on the upper side of the slide plate. The electromagnet is fixedly installed in the fine-wire micro-arc welding gun. The two ends of the scraper rod on the lower side are fixedly connected to the C-shaped cavity. Cleaning liquid is arranged in the lower side of the C-shaped cavity.

5. The magnesium alloy laser-arc hybrid welding device based on filament double micro-arc coordinated matching according to claim 4 is characterized in that: A toothed roller is movably connected to the lower side of the C-shaped cavity, the toothed roller is meshed with the rubber toothed plate, one end of the toothed roller is fixedly connected to a pulley, the pulley is connected to another pulley through a belt, the other pulley is fixedly connected to the output end of the transmission motor, and the transmission motor is fixedly installed in the fine-wire micro-arc welding gun.

6. The magnesium alloy laser-arc hybrid welding device based on filament double micro-arc coordinated matching according to claim 5 is characterized in that: Three U-shaped plates are arranged in the cavity, a T-shaped rubber ring is slidably connected in the U-shaped plate, one end of the U-shaped plate away from the T-shaped rubber ring is fixedly connected to a T-shaped rod, one end of the T-shaped rod is slidably connected in the second connecting cavity, the second connecting cavity is opened in the fine-wire micro-arc welding gun, a connecting spring is sleeved on the outside of the T-shaped rod, one end of the connecting spring is fixedly connected to the second connecting cavity, and the other end is fixedly connected to the T-shaped rod.

7. The magnesium alloy laser-arc hybrid welding device based on fine wire double micro-arc coordinated matching according to claim 4 is characterized in that: The drying mechanism comprises a through cavity, in which a heating plate and a fan are fixedly connected, respectively, and both ends of the through cavity are fixedly connected with a filter screen.

8. The magnesium alloy laser-arc hybrid welding device based on fine wire double micro-arc coordinated matching according to claim 1 is characterized in that: A connecting motor is fixedly connected inside the upper end of the cross bar, and an output end of the connecting motor is fixedly connected to a T-shaped lead screw, and the T-shaped lead screw is screwed into the U-shaped support frame.

9. An arc hybrid welding method, used in the thin-wire dual micro-arc coordinated matching magnesium alloy laser-arc hybrid welding device as described in any one of claims 1 to 8, characterized in that: include: S1. Place two magnesium alloy plates on the upper end of the bottom plate so that the gap between the two magnesium alloy plates is located at the lower side of the multi-source composite laser welding head, clamp the two magnesium alloy plates by a clamping mechanism, install the welding wire into the fine wire micro-arc welding gun, guide the welding wire of the conveying mechanism for conveying, turn on two electromagnets to make the scraper pull the cleaning cloth belt, and the cleaning cloth belt wound in the cavity is tightened and fits the surface of the welding wire; S2. The surface of the welding wire is cleaned by a moving cleaning cloth belt. When the cleaning cloth belt moves to the lower side of the C-shaped cavity, it contacts the cleaning liquid. The cleaning cloth belt is cleaned with the cooperation of the scraper rod and the cleaning liquid on the lower side. The cleaned welding wire is driven by the guide conveying mechanism to enter the drying mechanism to dry the surface of the welding wire. S3. Turn on the multi-source composite laser welding head to convert the lasers emitted by the fiber laser and the semiconductor laser into composite lasers for emission. The composite laser emitted by the multi-source composite laser welding head melts the two synchronously extended welding wires, and the two magnesium alloy plates are welded together using the melted welding wires.

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