A magnesium alloy laser-arc hybrid welding device and method based on fine-wire dual micro-arc coordinated matching

Abstract

The present invention relates to the technical field of laser welding, and specifically to a magnesium alloy laser-arc hybrid welding device and method based on the coordinated matching of fine wire and double micro-arcs, comprising a base plate, an upper end of the base plate being provided with a clamping mechanism, the magnesium alloy plate being clamped by the clamping mechanism, the upper end of the base plate being fixedly connected to a U-shaped support frame, the inner side of the U-shaped support frame being movably connected to a cross bar, one side of the cross bar being fixedly connected to a multi-source composite laser welding head; the welding wire is guided and conveyed by a guiding mechanism, the surface of the welding wire entering the fine wire micro-arc welding gun is cleaned by a cleaning mechanism, the surface of the welding wire cleaned by the cleaning mechanism is dried by a drying mechanism, the composite laser emitted by the multi-source composite laser welding head is used to melt 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 adheres to the surface of the welding wire.

Description

Technical Field

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

[0002] For example, the Chinese patent with the announcement number CN118357581A discloses an H-beam laser arc hybrid welding device, which includes 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, the side of the bottom plate is provided with a cylinder, the telescopic end of the cylinder is fixedly connected to a movable plate, 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, reducing the number of flipping times and improving welding efficiency. However, during use, due to external environmental reasons, when a large amount of foreign matter such as oil, dust, moisture or other pollutants adheres to the surface of the welding wire, these foreign matter make the welding wire easy to form pores after welding, affecting the strength of the weld, or forming impurities floating on the surface of the weld, forming welding slag or residue, affecting the appearance of the weld. For this reason, we have introduced a magnesium alloy laser-arc hybrid welding device and method based on the coordinated matching of fine wire and double micro-arc. 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 the coordinated matching of fine wires and double micro-arcs, so as to solve the problems raised in the above background technology.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] A magnesium alloy laser-arc hybrid welding device based on fine-filament dual micro-arc coordinated matching includes a base plate, a clamping mechanism is provided at the upper end of the base plate, and the magnesium alloy plate is clamped by the clamping mechanism. The upper end of the base plate is fixedly connected to a U-shaped support frame, and a cross bar is movably connected to the inner side of the U-shaped support frame. A multi-source composite laser welding head is fixedly connected to one side of the cross bar. The multi-source composite laser welding head is connected to a fiber laser and a semiconductor laser respectively through a transmission optical fiber, so that the multi-source composite laser welding head emits a composite laser.

[0007] 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 to guide and convey the welding wire. A cleaning mechanism is provided in the fine-wire micro-arc welding gun to clean the surface of the welding wire entering the fine-wire micro-arc welding gun.

[0008] The fine-wire micro-arc welding gun is provided with a drying mechanism, which dries the surface of the welding wire after being cleaned by the cleaning mechanism. 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.

[0009] Preferably, the clamping mechanism includes a T-shaped clamping plate, the lower end of the T-shaped clamping plate is slidably connected to the 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 to the first slide groove, one end of the screw rod extends into the external environment and is fixedly connected to the handwheel.

[0010] 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 provided 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 slid into the limiting groove, and the limiting groove is 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 concave, 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.

[0011] 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, and 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 communicated with the cavity, and scrapers are provided 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 the slide, and the slide is slid into the second slide groove, and the second slide groove is opened in the C-shaped cavity, and an electromagnet is provided on the upper side of the slide, 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 provided in the lower side of the C-shaped cavity.

[0012] 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, and 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.

[0013] Preferably, three U-shaped plates are provided in the cavity, a T-shaped rubber ring is slidably connected in the U-shaped plate, and a T-shaped rod is fixedly connected to one end of the U-shaped plate away from the T-shaped rubber ring. One end of the T-shaped rod is slidably connected to the second connecting cavity, and 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, and 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.

[0014] Preferably, the drying mechanism includes a through cavity, a heating plate and a fan are fixedly connected to the through cavity, and filters are fixedly connected to both ends of the through cavity.

[0015] Preferably, a connecting motor is fixedly connected to the upper end of the cross bar, an output end of the connecting motor is fixedly connected to a T-shaped screw rod, and the T-shaped screw rod is screwed into the U-shaped support frame.

[0016] In addition, to achieve the above-mentioned object, the present invention further provides an arc hybrid welding method for the above-mentioned fine-wire dual-micro-arc coordinated matching magnesium alloy laser-arc hybrid welding device, comprising:

[0017] S1. Place two magnesium alloy plates on the upper end of the base plate so that the gap between the two magnesium alloy plates is located below the multi-source composite laser welding head. Clamp the two magnesium alloy plates using a clamping mechanism. Install the welding wire into the fine-wire micro-arc welding gun. Feed the welding wire through the guide feeding mechanism. Turn on two electromagnets to cause the scraper rod to pull the cleaning cloth. The cleaning cloth wound in the cavity is tightened and adheres to the surface of the welding wire.

[0018] S2. The surface of the welding wire is cleaned by a moving cleaning cloth. When the cleaning cloth moves to the lower side of the C-shaped cavity, it comes into contact with the cleaning liquid. The cleaning cloth is cleaned by the scraper on the lower side and the cleaning liquid. The cleaned welding wire is driven by the guide conveyor mechanism into the drying mechanism to dry the surface of the welding wire.

[0019] 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.

[0020] 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 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 is cleaned by the cleaning mechanism, so that the oil and impurities on the surface of the welding wire are cleaned, and the surface of the welding wire cleaned by the cleaning mechanism is dried by the drying mechanism. 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 by the melted welding wire, thereby solving the problem of affecting the welding effect when a lot of foreign matter adheres to the surface of the welding wire. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic cross-sectional view of the present invention;

[0022] Figure 2 This is a schematic cross-sectional view of the fine-wire micro-arc welding gun of the present invention;

[0023] Figure 3 For the present invention Figure 2 A in the middle is an enlarged cross-sectional structural diagram;

[0024] Figure 4 This is a schematic cross-sectional view of the connection between the electromagnet and the slide of the present invention;

[0025] Figure 5 This is a schematic diagram of the cross-sectional structure of the C-shaped cavity position of the present invention;

[0026] Figure 6 This is a schematic cross-sectional view of the welding wire installation state of the present invention;

[0027] Figure 7 This is a schematic cross-sectional view of the cleaning cloth tape of the present invention in a wound state;

[0028] Figure 8 This is a schematic diagram of a three-dimensional cross-sectional structure of the cleaning cloth tape of the present invention in a wound state;

[0029] Figure 9 It is a schematic diagram of the three-dimensional structure of the fine-wire micro-arc welding gun of the present invention.

[0030] Figure: 1, bottom plate; 2, U-shaped support frame; 3, hand wheel; 4, T-shaped clamping plate; 5, lead screw; 6, first chute; 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; 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 chute; 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

[0031] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. 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 making creative efforts are within the scope of protection of the present invention.

[0032] See also Figure 1-9 , the present invention provides a technical solution:

[0033] Example 1: A magnesium alloy laser-arc hybrid welding device based on fine wire double micro-arc coordinated matching includes a base plate 1, an upper end of the base plate 1 is provided with a clamping mechanism, two magnesium alloy plates are placed on the upper end of the base plate 1, and the splicing portion of the two magnesium alloy plates is set on the lower side of the multi-source composite laser welding head 13, the magnesium alloy plates are clamped by the clamping mechanism, the upper end of the base plate 1 is fixedly connected to a U-shaped support frame 2, the inner side of the U-shaped support frame 2 is movably connected to a cross bar 8, both ends of the cross bar 8 are fixedly connected to a T-shaped limit block, the inner side of the U-shaped support frame 2 is provided with a T-shaped limit groove, 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;

[0034] 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 connected to the fiber laser and the semiconductor laser respectively through transmission optical fibers, so that the multi-source composite laser welding head 13 emits composite laser light. When the multi-source composite laser welding head 13 is turned on, the laser light emitted by the fiber laser and the semiconductor laser is converted into composite laser light and emitted. The composite laser light 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 by the melted welding wires.

[0035] 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. Several 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 cleaning mechanism cleans the surface of the welding wire entering the fine wire micro-arc welding gun 7, so that the oil and impurities on the surface of the welding wire are cleaned;

[0036] 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 dries the surface of the welding wire 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.

[0037] Example 2: On the basis of Example 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 base 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 handwheel 3, and two magnesium alloy plates are placed on the upper end of the base plate 1. After placement, the handwheel 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;

[0038] 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 provided 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 opened in the first connecting cavity 28. The insides of the two U-shaped connecting blocks 31 are movable with transmission guide wheels 30. The outsides of the transmission guide wheels 30 are concave. 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, and one end of the U-shaped connecting block 31 is fixedly connected to the support spring 32, and the other end of the support spring 32 is fixedly connected to the first connecting cavity 28. When the welding wire enters between the two transmission guide wheels 30, the U-shaped connecting block 31 will be pushed outward. When the U-shaped connecting block 31 moves, it drives the limit block 34 to move along the limit groove 33. At the same time, the support spring 32 is compressed. 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.

[0039] 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 provided in the cavity 23. Figure 8 As shown, the cleaning cloth belt 43 is wound and arranged in the cavity 23, the outside of the cleaning cloth belt 43 is fixedly connected to the rubber tooth plate 36, the outside of the rubber tooth plate 36 is fixedly connected to the T-shaped rubber ring 42, the fine wire micro-arc welding gun 7 is provided with a C-shaped cavity 12, the C-shaped cavity 12 is connected to the cavity 23, the upper and lower sides of the C-shaped cavity 12 are provided with scrapers 14, the two ends of the upper scraper 14 are fixedly connected to the slide 17, the slide 17 is slidably connected to the second slide 22, the second slide 22 is provided in the C-shaped cavity 12, the upper side of the slide 17 is provided with an electromagnet 25, 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 moving cleaning cloth belt 43 cleans the surface of the welding wire. 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.

[0040] 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. One end of the toothed roller 10 is fixedly connected to a pulley 26, 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 the other 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 meshing with the toothed roller 10 will start to move;

[0041] 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 entangled cleaning tapes 43, so that the welding wire can pass through the entangled cleaning tapes 43;

[0042] The drying mechanism includes a through cavity 35, in which a heating plate 18 and a fan 21 are fixedly connected, and a filter screen 20 is 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 to 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 to 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.

[0043] In addition, to achieve the above-mentioned object, the present invention also provides an arc hybrid welding method for the above-mentioned fine-wire dual-micro-arc coordinated matching magnesium alloy laser-arc hybrid welding device, comprising:

[0044] S1. Place two magnesium alloy plates on the upper end of the base plate 1 so that the gap between the two magnesium alloy plates is located below the multi-source composite laser welding head 13. Clamp the two magnesium alloy plates using a clamping mechanism. Install the welding wire into the fine wire micro-arc welding gun 7. Feed the welding wire through the guide feeding mechanism. Turn on the two electromagnets 25 so that the scraper 14 pulls the cleaning cloth 43. The cleaning cloth 43 wound in the cavity 23 is tightened and adheres to the surface of the welding wire.

[0045] S2. The surface of the welding wire is cleaned by the moving cleaning cloth 43. When the cleaned cleaning cloth 43 moves to the lower side of the C-shaped cavity 12, it comes into contact with the cleaning liquid. The cleaning cloth 43 is cleaned by the scraper 14 on the lower side and the cleaning liquid. The cleaned welding wire is driven by the guide conveyor mechanism into the drying mechanism to dry the surface of the welding wire.

[0046] 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.

[0047] Working principle: when in use, two magnesium alloy plates are placed on the upper end of the base 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;

[0048] The two electromagnets 25 are turned on to attract the slide 17, and the two slides 17 move upward to pull the scraper 14 connected thereto. The scraper 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 the other pulley 26 to start rotating through the belt 37. The rotation of the other pulley 26 drives the gear roller 10 to start rotating. At this time, the rubber tooth plate 36 meshing with the gear roller 10 will start moving.

[0049] The rotation of the rubber tooth plate 36 drives the cleaning belt 43 to move synchronously, and the moving cleaning belt 43 cleans the surface of the welding wire. When the cleaned cleaning belt 43 moves to the lower side of the C-shaped cavity 12, it contacts the cleaning liquid. 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 under the drive of 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 is blown onto the surface of the welding wire to dry the welding wire.

[0050] 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 melts the two synchronously extended welding wires, and the two magnesium alloy plates are welded together by the melted welding wires.

[0051] While 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 these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A magnesium alloy laser-arc hybrid welding device based on synergistic matching of fine wires and dual micro-arcs, comprising a base plate, characterized in that: The upper end of the base plate is provided with a clamping mechanism, which clamps the magnesium alloy plate. The upper end of the base plate is fixedly connected to a U-shaped support frame, and a cross bar is movably connected to the inner side of the U-shaped support frame. A multi-source composite laser welding head is fixedly connected to one side of the cross bar. 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 to guide and convey the welding wire. A cleaning mechanism is provided in the fine-wire micro-arc welding gun to clean the surface of the welding wire entering the fine-wire micro-arc welding gun. The fine-wire micro-arc welding gun is provided with a drying mechanism, which dries the surface of the welding wire after being cleaned by the cleaning mechanism. The upper end of the crossbar is fixedly connected to two T-shaped positioning plates, and the outer side of the T-shaped positioning plates is sleeved with a welding wire reel. A rubber cleaning ring is fixedly installed at one end of the fine-wire micro-arc welding gun; 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, and 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. A C-shaped cavity is opened in the fine-wire micro-arc welding gun, and the C-shaped cavity is communicated with the cavity. Scraper rods are provided 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 the slide, and the slide is slid into the second slide groove, and the second slide groove is opened in the C-shaped cavity. An electromagnet is provided on the upper side of the slide, 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 provided in the lower side of the C-shaped cavity.

2. The magnesium alloy laser-arc hybrid welding device based on synergistic matching of fine wire and double micro-arc according to claim 1, characterized in that: The clamping mechanism includes a T-shaped clamping plate, the lower end of the T-shaped clamping plate is slidably connected to the 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 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 synergistic matching of fine wire and double micro-arc according to claim 1, 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 provided 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 slid into the limiting groove. The limiting groove is 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. 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 based on synergistic matching of fine wire and double micro-arc according to claim 1, characterized in that: A toothed roller is movably connected to the lower side of the C-shaped cavity, and the toothed roller is meshed with the rubber toothed plate. One end of the toothed roller is fixedly connected to a pulley, and 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.

5. The magnesium alloy laser-arc hybrid welding device based on synergistic matching of fine wire and double micro-arc according to claim 4, characterized in that: Three U-shaped plates are provided in the cavity, a T-shaped rubber ring is slidably connected in the U-shaped plate, a T-shaped rod is fixedly connected to one end of the U-shaped plate away from the T-shaped rubber ring, one end of the T-shaped rod is slidably connected to 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.

6. The magnesium alloy laser-arc hybrid welding device based on synergistic matching of fine wire and double micro-arc according to claim 1, characterized in that: The drying mechanism comprises a through cavity, a heating plate and a fan are fixedly connected in the through cavity respectively, and a filter is fixedly connected at both ends of the through cavity.

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

8. An arc hybrid welding method, used in the thin-wire dual-micro-arc coordinated matching magnesium alloy laser-arc hybrid welding device according to any one of claims 1 to 7, characterized in that: include: S1. Place two magnesium alloy plates on the upper end of the base plate so that the gap between the two magnesium alloy plates is located below the multi-source composite laser welding head. Clamp the two magnesium alloy plates using a clamping mechanism. Install the welding wire into the fine-wire micro-arc welding gun. Feed the welding wire through the guide feeding mechanism. Turn on two electromagnets to cause the scraper rod to pull the cleaning cloth. The cleaning cloth wound in the cavity is tightened and adheres to the surface of the welding wire. S2. The surface of the welding wire is cleaned by a moving cleaning cloth. When the cleaning cloth moves to the lower side of the C-shaped cavity, it comes into contact with the cleaning liquid. The cleaning cloth is cleaned by the scraper on the lower side and the cleaning liquid. The cleaned welding wire is driven by the guide conveyor mechanism into 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 melted wires are then used to weld the two magnesium alloy plates together.

Images