An automatic laser welding robot for the annular seam of upper and lower cold plates

Abstract

The present application relates to the field of welding technology and specifically discloses an automatic laser welding robot for annular seams of upper and lower cold plates, comprising a robot arm, a mounting frame, a laser, a reel, and a guide tube; the mounting frame is mounted at the output end of the robot arm; the reel is mounted on one side of the mounting frame, and a welding wire is wound on the reel; a connecting block is mounted on the mounting frame, and a guide tube is passed through the connecting block, and the welding wire is passed through the guide tube; the end face of the guide tube near the reel is connected to two first curved plates; the end face of the first curved plate away from the guide tube is connected to a transmission block, and the transmission block is provided with a transmission hole, and the transmission block is provided with two sliding grooves; a group of rollers slides in each sliding groove, and adjacent rollers are connected by ropes; the rollers in the sliding grooves squeeze the welding wire, and a driving mechanism for driving the rollers to slide in the sliding grooves is mounted on the connecting block; the laser is mounted on the mounting frame, and the laser light of the laser irradiates the end of the welding wire. The present application has the effect of improving the sealing performance of the cold plate.

Description

Technical Field

[0001] The invention relates to the technical field of welding, in particular to an automatic laser welding manipulator for annular seams of upper and lower cold plates. Background Art

[0002] Cold plates are commonly used to cool battery packs in electric vehicles and often have an upper cold plate and a lower cold plate. The cold plate includes an upper cover plate and a lower runner plate. The upper cover plate is welded to the runner surface of the lower runner plate, and welding is performed along the edge gap between the upper cover plate and the lower runner plate.

[0003] When welding the upper cover plate and the lower runner plate, laser brazing is usually used. The laser melts the welding wire to connect the upper cover plate and the lower runner plate. During the welding process, the welding wire is laid along the cold plate weld seam. At the same time, the laser irradiates and melts the laid welding wire. The welding wire is conveyed from the reel. A pair of friction rollers convey the feed, and the friction rollers pull the welding wire out of the reel. During the pulling out process, due to slippage between the welding wire and the conveying friction rollers, the speed at which the welding wire is conveyed to the weld seam changes. During laser welding, welding defects are prone to occur, resulting in poor sealing of the upper cover plate and the lower runner plate. Summary of the Invention

[0004] In order to improve the problem of poor sealing between the upper cover plate and the lower flow channel plate, the present application provides an automatic laser welding robot for the annular seams of the upper and lower cold plates.

[0005] The present application provides an automatic laser welding robot for the annular seam of upper and lower cold plates, which adopts the following technical solutions:

[0006] An automatic laser welding robot for the annular seam of upper and lower cold plates, comprising a robot arm, a mounting frame, a laser, a reel and a guide tube; the mounting frame is mounted on the output end of the robot arm; the reel is mounted on one side of the mounting frame and close to the output end of the robot arm, a welding wire is wound on the reel, a connecting block is mounted on the mounting frame, the guide tube is passed through the connecting block and is fixedly installed, the end of the guide tube faces the weld formed between the upper cover plate and the lower flow channel plate, the welding wire is passed through the guide tube; the end face of the guide tube close to the reel is connected to two first curved plates, the inner side face of the first curved plate is in close contact with the surface of the welding wire The first arc plate is connected to the end face of the guide tube with a transmission block, a transmission hole for the welding wire to pass through is provided in the transmission block, and two sliding grooves running through both ends are provided in the transmission block, and the two sliding grooves are symmetrically arranged about the transmission hole and are connected with the transmission hole; a group of rollers slides in each sliding groove, and each group of adjacent rollers is connected to form a circle by a rope; the rollers located in the sliding groove are squeezed on the welding wire, and a driving mechanism for driving the rollers to slide in the sliding groove is installed on the connecting block; the laser is installed on the mounting frame, and the laser of the laser irradiates the end of the welding wire.

[0007] Optionally, a rotating shaft is passed through the roller, two ends of the rotating shaft extend out of two ends of the roller, and a rolling groove for the rotating shaft to roll is provided in the transmission block.

[0008] Optionally, the driving mechanism includes a turntable, a rotating shaft and a driving assembly; support blocks are installed on both sides of the transmission block, the outer surface of the support block is an inclined surface, and the roller rolls on the outer surface of the support block; one side of the support block is connected to a first support plate, and both ends of the first support plate extend to the side of the support block; two rotating shafts are provided, and the two rotating shafts are rotatably connected to the two ends of the first support plate respectively; two turntables are provided, and the two turntables are coaxially connected to the ends of the rotating shaft respectively; the ends of the two support blocks are provided with notches for the rotation of the turntable, and a plurality of slots for clamping the rollers are evenly provided on the circumference of the turntable; the driving assembly is installed on the connecting block, and the driving assembly is used to drive the rotating shaft to rotate.

[0009] Optionally, the drive assembly includes a worm gear, a worm and a motor; two worm gears are provided, and the two worm gears are coaxially connected to the end of the rotating shaft; the side of the first support plate is connected to the second support plate, and the second support plate is rotatably connected with a connecting rod; two worm gears are provided, and the two worm gears are connected by a connecting rod, and the two worm gears have opposite spiral directions, and the two worm gears are respectively engaged with the two worm gears; the side of the connecting block close to the second support plate is connected to the third support plate, the end of the third support plate is connected to the fourth support plate, and the side of one end of the fourth support plate is connected to the end face of the second support plate; the motor is installed on the side of the third support plate, and the output shaft of the motor is connected to one of the ends of the worm gears.

[0010] Optionally, an air guide column is sleeved on the end of the guide tube, an annular air cavity is provided in the air guide column, and an air connecting pipe is connected to the circumference of the end of the air guide column close to the connecting block, and the air connecting pipe is used to connect to the gas cylinder of inert gas; an annular groove is provided on the end face of the air guide column away from the connecting block, and the annular groove is connected to the annular air cavity, the width of the annular groove gradually thickens from the inside to the outside, and the annular groove is inclined outward; an annular air outlet is provided on the end face of the air guide column, and the annular air outlet is located in the annular groove.

[0011] Optionally, the end face of the transmission block away from the first curved plate is connected to two second curved plates, and the inner side surfaces of the two second curved plates are closely attached to the surface of the welding wire; the end faces of the two second curved plates away from the transmission block are connected to a straightening tube, the welding wire passes into the straightening tube, and the inner wall of the straightening tube is in contact with the surface of the welding wire.

[0012] Optionally, a first connecting plate is connected to the side of the mounting frame close to the reel, a first fine-tuning slider is installed on the side of the connecting plate, a second fine-tuning slider is installed on the first fine-tuning slider, and a second connecting plate is installed on the second fine-tuning slider. The movement direction of the second fine-tuning slider driven by the first fine-tuning slider is perpendicular to the movement direction of the second connecting plate driven by the second fine-tuning slider; the second connecting plate is U-shaped, and two groups of lasers are provided, each group has three, and the two groups of lasers are respectively installed at both ends of the second connecting plate, and the laser directions of the two groups of lasers are at one point.

[0013] Optionally, a lens is installed at the emitting end of each group of lasers, and a lens is inside the lens, and the laser is irradiated to the end of the welding wire through the lens; an exhaust pipe is installed on the side of the lens through a plate, and the exhaust pipe is located below one side of the lens, and multiple exhaust holes are provided on the side of the exhaust pipe close to the lens.

[0014] Optionally, a second support frame is installed on the mounting frame, and the second support frame is a plate. One end of the second support frame is connected to the mounting frame, and the other end of the second support frame is bent downward. A smoke exhaust pipe is installed at the bottom end of the second support frame, and one end of the smoke exhaust pipe faces the welding point of the welding wire, and the other end of the smoke exhaust pipe is connected to the fan.

[0015] Optionally, a sleeve is connected to the mounting frame, a sliding rod slides inside the sleeve, a positioning pin is passed through the sliding rod, and both ends of the positioning pin extend out of the sliding rod; a strip hole for the positioning pin to slide is provided on the sleeve; a knob is connected to the sleeve, and the end of the knob is pressed against the circumference of the sliding rod; the end of the sleeve is closed, and a spring is provided in the sleeve, one end of the spring is pressed against the end of the sliding rod, and the other end of the spring is pressed against the closed end of the sleeve; one side of the connecting block is connected to the end of the sliding rod away from the mounting frame by a bolt thread.

[0016] In summary, this application includes at least one of the following beneficial technical effects:

[0017] 1. When welding the cold plate, the robotic arm drives the mounting frame to move along the weld seam, and the driving mechanism drives the wire mesh on the wire reel to move in the guide tube. The welding wire in the guide tube extends out of the guide tube and the end is laid on the weld seam. The laser irradiates the end of the welding wire to melt the welding wire; the driving mechanism drives the roller to move, and the rollers in the two sliding grooves slide in the direction of the guide tube. Since the rollers squeeze the welding wire, the rollers drive the welding wire to move forward, and each sliding groove has multiple rollers. The rollers in the sliding grooves are all squeezed on the welding wire and synchronously drive the welding wire forward. When one pair of rollers slips, the remaining rollers still drive the welding wire forward, so that the speed of the welding wire output from the guide tube is more uniform, and it is not easy to have a missing weld. The weld is completely welded, which improves the sealing of the cold plate.

[0018] 2. When the roller needs to be driven to roll, the motor drives the two worms to rotate, and the two worms drive the two worm wheels to rotate. The two worm wheels rotate in opposite directions. The two worm wheels drive the two turntables to rotate through the rotating shaft. The two turntables rotate in opposite directions. The turntables drive the rollers to move. The rollers drive the connected rollers to move together through the ropes. The rollers slide on the surface of the support block. The rollers slide from the end of the transmission block away from the connecting block into the sliding groove. The rollers then slide out of the sliding groove from the end of the transmission block close to the connecting block and slide to the surface of the support block.

[0019] 3. When welding the weld, in order to prevent oxidation of the weld, it is necessary to spray protective gas into the weld. The inert gas is introduced from the gas pipe, and the inert gas flows into the annular air cavity. The gas in the annular air cavity flows out through the annular groove and the annular air outlet. The gas flowing out of the annular groove diffuses outward to form an air curtain to isolate the external gas. The gas sprayed from the annular air outlet acts on the weld to prevent the entry of oxygen and avoid oxidation. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the structure of the laser welding manipulator welding the cold plate in an embodiment of the present application;

[0021] Figure 2 yes Figure 1 Schematic diagram of the enlarged structure of part A;

[0022] Figure 3 This is a schematic diagram of the structure of the output end of the robotic arm according to an embodiment of the present application;

[0023] Figure 4 This is a schematic structural diagram of the output end of the robotic arm according to another embodiment of the present application from another perspective;

[0024] Figure 5 This is a schematic structural diagram of a casing according to an embodiment of the present application;

[0025] Figure 6 It is a structural diagram of the driving mechanism of an embodiment of the present application;

[0026] Figure 7 is a schematic cross-sectional structural diagram of a transmission block according to an embodiment of the present application;

[0027] Figure 8 This is a schematic diagram of the structure of the transmission block in an embodiment of the present application;

[0028] Figure 9 Schematic diagram of the cross-sectional structure of the air guide column according to an embodiment of the present application;

[0029] Figure 10 yes Figure 9 Schematic diagram of the enlarged structure of part B.

[0030] Description of reference numerals:

[0031] 01. Cold plate; 011. Upper cover; 012. Downstream plate; 1. Robotic arm; 2. Mounting frame; 21. Connecting block; 22. First support frame; 221. First support shaft; 222. Second support shaft; 23. First connecting plate; 24. First fine-tuning slider; 25. Second fine-tuning slider; 26. Second connecting plate; 27. Camera; 28. Second support frame; 281. Exhaust pipe; 29. ​​Casing; 291. Sliding rod; 292. Positioning pin; 293. Strip hole; 294. Knob; 295. Spring; 3. Laser; 31. Lens; 311. Lens; 312. Exhaust pipe; 3121. Exhaust hole; 4. Reel; 41. Welding wire; 5. Guide tube; 5 1. First curved plate; 6. Transmission block; 61. Transmission hole; 62. Sliding groove; 63. Roller; 631. Rotating shaft; 64. Rope; 65. Rolling groove; 66. Support block; 661. First support plate; 662. Notch; 67. Second curved plate; 68. Straightening tube; 7. Driving mechanism; 71. Turntable; 711. Slot; 72. Rotating shaft; 73. Driving assembly; 731. Worm gear; 732. Worm; 733. Motor; 734. Second support plate; 735. Connecting rod; 736. Third support plate; 737. Fourth support plate; 8. Air guide column; 81. Annular air cavity; 82. Air connecting pipe; 83. Annular groove; 84. Annular air outlet; 9. Workbench. DETAILED DESCRIPTION

[0032] The following is combined with Figure 1-10 This application is described in further detail.

[0033] The embodiment of the present application discloses an automatic laser welding robot for the annular seam of upper and lower cold plates. Figure 1-10The laser welding robot includes a robot arm 1, a mounting frame 2, a laser 3, a reel 4 and a guide tube 5; the base of the robot arm 1 is installed on a suspended track, and the mounting frame 2 is installed on the output end of the robot arm 1; the reel 4 is installed on one side of the mounting frame 2 and close to the output end of the robot arm 1, a welding wire 41 is wound on the reel 4, a connecting block 21 is installed on the mounting frame 2, the guide tube 5 is passed through the connecting block 21 and is fixedly installed, the end of the guide tube 5 faces the weld formed between the upper cover plate 011 and the lower flow channel plate 012, and the welding wire 41 is passed through the guide tube 5; the end face of the guide tube 5 close to the reel 4 is connected to two first curved plates 51, and the inner side surface of the first curved plate 51 is in close contact with the surface of the welding wire 41 ; The end face of the first curved plate 51 away from the guide tube 5 is connected to a transmission block 6, and a transmission hole 61 for the welding wire 41 to pass through is provided in the transmission block 6, and two sliding grooves 62 running through both ends are provided in the transmission block 6, and the two sliding grooves 62 are symmetrically arranged about the transmission hole 61 and are connected to the transmission hole 61; a group of rollers 63 slide in each sliding groove 62, and each group of adjacent rollers 63 are connected into a circle by a rope 64; the rollers 63 located in the sliding groove 62 are squeezed on the welding wire 41, and a driving mechanism 7 for driving the rollers 63 to slide in the sliding groove 62 is installed on the connecting block 21; the laser 3 is installed on the mounting frame 2, and the laser of the laser 3 irradiates the end of the welding wire 41.

[0034] When welding the cold plate 01, the robot arm 1 drives the mounting frame 2 to move along the weld seam, and the driving mechanism 7 drives the welding wire 41 on the welding wire 41 reel 4 to move in the guide tube 5. The welding wire 41 in the guide tube 5 extends out of the guide tube 5 and the end is laid on the weld seam. The laser irradiates the end of the welding wire 41 to melt the welding wire 41; the driving mechanism 7 drives the roller 63 to move, and the rollers 63 in the two sliding grooves 62 slide toward the guide tube 5. Since the rollers 63 are squeezed on the welding wire 41, the rollers 63 drive the welding wire 41 to move forward, and each sliding groove 62 has a plurality of rollers 63. The rollers 63 located in the sliding groove 62 are all squeezed on the welding wire 41 and synchronously drive the welding wire 41 forward. When one pair of rollers 63 slips, the remaining rollers 63 still drive the welding wire 41 forward, so that the speed of the welding wire 41 output from the guide tube 5 is relatively uniform, and it is not easy to have a weld defect. The weld is completely welded tight, thereby improving the sealing of the cold plate 01.

[0035] A rotating shaft 631 is passed through the roller 63, and both ends of the rotating shaft 631 extend out of the two ends of the roller 63. A rolling groove 65 for the rotating shaft 631 to roll is provided in the transmission block 6; when the roller 63 enters the sliding groove 62, the rotating shaft 631 also enters the rolling groove 65, and the rotating shaft 631 limits the movement of the roller 63 in the sliding groove 62, so that the roller 63 can only slide along the direction of the sliding groove 62, and will not oscillate up and down; due to the restriction of the rotating shaft 631, the side of the roller 63 away from the welding wire 41 has less friction with the inner wall of the sliding groove 62, and relies on the rolling of the rotating shaft 631 to drive the roller 63 to slide.

[0036] The driving mechanism 7 includes a turntable 71, a rotating shaft 72 and a driving assembly 73; support blocks 66 are installed on both sides of the transmission block 6, the outer surface of the support block 66 is an inclined surface, and the roller 63 rolls on the outer surface of the support block 66; one side of the support block 66 is connected to a first support plate 661, and both ends of the first support plate 661 extend to the side of the support block 66; two rotating shafts 72 are provided, and the two rotating shafts 72 are respectively rotatably connected to the two ends of the first support plate 661; two turntables 71 are provided, and the two turntables 71 are respectively coaxially connected to the ends of the rotating shaft 72; the ends of the two support blocks 66 are provided with notches 662 for the rotation of the turntable 71, and a plurality of card slots 711 for clamping the roller 63 are evenly provided on the circumference of the turntable 71; the driving assembly 73 is installed on the connecting block 21, and the driving assembly 73 is used to drive the rotating shaft 72 to rotate.

[0037] The driving assembly 73 includes a worm gear 731, a worm 732 and a motor 733; two worm gears 731 are provided, and the two worm gears 731 are coaxially connected to the end of the rotating shaft 72; the side of the first support plate 661 is connected to the second support plate 734, and the second support plate 734 is rotatably connected with a connecting rod 735; there are two worm gears 732, and the two worm gears 732 are connected by the connecting rod 735. The two worm gears 732 have opposite spiral directions, and the two worm gears 732 are respectively engaged with the two worm gears 731; the side of the connecting block 21 close to the second support plate 734 is connected to the third support plate 736, and the end of the third support plate 736 is connected to the fourth support plate 737, and one end of the fourth support plate 737 is connected to the end face of the second support plate 734; the motor 733 is installed on the side of the third support plate 736, and the output shaft of the motor 733 is connected to the end of one of the worm gears 732.

[0038] When it is necessary to drive the roller 63 to roll, the motor 733 drives the two worm gears 732 to rotate, and the two worm gears 732 drive the two worm wheels 731 to rotate. The two worm wheels 731 rotate in opposite directions. The two worm wheels 731 drive the two turntables 71 to rotate through the rotating shaft 72. The two turntables 71 rotate in opposite directions. The turntable 71 drives the roller 63 to move. The roller 63 drives the connected roller 63 to move together through the rope 64. The roller 63 slides on the surface of the support block 66. The roller 63 slides from the end of the transmission block 6 away from the connecting block 21 into the sliding groove 62. The roller 63 then slides out of the sliding groove 62 from the end of the transmission block 6 close to the connecting block 21 and slides to the surface of the support block 66.

[0039] An air guide column 8 is sleeved on the end of the guide tube 5, and an annular air cavity 81 is provided in the air guide column 8. The circumferential surface of the end of the air guide column 8 close to the connecting block 21 is connected to a gas connecting pipe 82, and the gas connecting pipe 82 is used to connect to a gas cylinder of inert gas; an annular groove 83 is provided on the end surface of the air guide column 8 away from the connecting block 21, and the annular groove 83 is connected to the annular air cavity 81. The width of the annular groove 83 gradually increases from the inside to the outside, and the annular groove 83 is inclined outward; an annular air outlet 84 is provided on the end surface of the air guide column 8, and the annular air outlet 84 is located in the annular groove 83.

[0040] When welding the weld, in order to prevent oxidation of the weld, it is necessary to spray protective gas into the weld. The inert gas is introduced from the gas pipe 82, and the inert gas flows into the annular air cavity 81. The gas in the annular air cavity 81 flows out through the annular groove 83 and the annular air outlet 84. The gas flowing out of the annular groove 83 diffuses outward to form an air curtain to isolate the external gas. The gas sprayed from the annular air outlet 84 acts on the weld, preventing the entry of oxygen and avoiding oxidation.

[0041] A first support frame 22 is mounted on the mounting frame 2 , and a first support shaft 221 and a second support shaft 222 are rotatably connected to the first support frame 22 ; the welding wire 41 pulled out by the reel 4 overlaps the surfaces of the first support shaft 221 and the second support shaft 222 .

[0042] The end face of the transmission block 6 away from the first curved plate 51 is connected to two second curved plates 67, and the inner side surfaces of the two second curved plates 67 are tightly attached to the surface of the welding wire 41; the end faces of the two second curved plates 67 away from the transmission block 6 are connected to a straightening tube 68, and the welding wire 41 passes into the straightening tube 68, and the inner wall of the straightening tube 68 is attached to the surface of the welding wire 41.

[0043] Before the welding wire 41 enters the guide tube 5 , the welding wire 41 first passes through the straightening tube 68 , which straightens the bent welding wire 41 to facilitate the subsequent transmission of the welding wire 41 and the melting of the welding wire 41 .

[0044] A first connecting plate 23 is connected to the side of the mounting frame 2 close to the reel 4, and a first fine-tuning slider 24 is installed on the side of the connecting plate. A second fine-tuning slider 25 is installed on the first fine-tuning slider 24, and a second connecting plate 26 is installed on the second fine-tuning slider 25. The movement direction of the second fine-tuning slider 25 driven by the first fine-tuning slider 24 is perpendicular to the movement direction of the second connecting plate 26 driven by the second fine-tuning slider 25; the second connecting plate 26 is U-shaped, and two groups of lasers 3 are provided, each group has three, and the two groups of lasers 3 are respectively installed at the two ends of the second connecting plate 26, and the laser directions of the two groups of lasers 3 are one point.

[0045] By setting up multiple lasers 3, the lasers of multiple lasers 3 act on the same point. The number of lasers 3 used can be adjusted according to the welding situation, and the energy generated by one laser 3 can be shared among six lasers 3 to reduce excessive heat generation of a single laser 3. The laser irradiation point of the laser 3 can be adjusted by fine-tuning the slider.

[0046] A lens 31 is installed at the emitting end of each group of lasers 3, and a lens 311 is provided inside the lens 31. The laser is irradiated to the end of the welding wire 41 through the lens 311; an exhaust pipe 312 is installed on the side of the lens 31 through a plate. The exhaust pipe 312 is located below one side of the lens 31, and a plurality of exhaust holes 3121 are provided on the side of the exhaust pipe 312 close to the lens 311.

[0047] During welding, the welding wire 41 is heated and melted by the laser, which easily generates a large amount of smoke and dust, which easily floats onto the lens 311 of the lens 31; therefore, ventilation is carried out through the exhaust pipe 312, and the exhaust pipe 312 sends the gas out through the exhaust hole 3121. The gas blows over the surface of the lens 311, blowing away the gas floating towards the lens 311, thereby preventing the lens 311 from being contaminated.

[0048] A camera 27 is installed on the side of the mounting frame 2. The camera 27 is located inside the second connecting plate 26. The camera 27 is located between the two groups of lasers 3. The camera 27 is facing the welding point of the welding wire 41. During the welding process, the welding point is recorded by the camera 27. When welding misalignment occurs, the camera 27 transmits a signal to the terminal, and the terminal controls the robotic arm 1 to adjust the welding point of the welding wire 41.

[0049] A second support frame 28 is installed on the mounting frame 2. The second support frame 28 is a plate. One end of the second support frame 28 is connected to the mounting frame 2, and the other end of the second support frame 28 is bent downward. An exhaust pipe 281 is installed at the bottom end of the second support frame 28. One end of the exhaust pipe 281 faces the welding point of the welding wire 41, and the other end of the exhaust pipe 281 is connected to the fan.

[0050] During welding, the smoke exhaust pipe 281 uses a fan to suck away the smoke generated at the welding site to prevent the smoke from contaminating the laser 3 and the camera 27. The smoke is also sucked away for centralized treatment to reduce the emission of toxic gases.

[0051] The mounting frame 2 is connected to a sleeve 29, inside which a slide rod 291 slides, and a positioning pin 292 is passed through the slide rod 291, with both ends of the positioning pin 292 extending out of the slide rod 291; the sleeve 29 is provided with a strip hole 293 for the positioning pin 292 to slide; the sleeve 29 is connected to a knob 294, and the end of the knob 294 is pressed tightly against the circumference of the slide rod 291; the end of the sleeve 29 is closed, and a spring 295 is provided in the sleeve 29, one end of the spring 295 is pressed tightly against the end of the slide rod 291, and the other end of the spring 295 is pressed tightly against the closed end of the sleeve 29; one side of the connecting block 21 is threadedly connected to the end of the slide rod 291 away from the mounting frame 2 by a bolt.

[0052] By loosening the knob 294, the slide rod 291 can be slid, and the slide rod 291 slides in the strip hole 293 through the positioning pin 292, so that the distance between the connecting block 21 and the sleeve 29 can be adjusted; by loosening the bolt, the rotation angle of the connecting block 21 can be adjusted; that is, the direction of the guide tube 5 and the distance between the guide tube 5 and the cold plate 01 can be adjusted.

[0053] The cold plate 01 is placed on the workbench 9 for welding.

[0054] The implementation principle of the automatic laser welding robot for the annular seam of the upper and lower cold plates in the embodiment of the present application is as follows: when welding the cold plate 01, the robot arm 1 drives the mounting frame 2 to move along the weld seam, the driving mechanism 7 drives the welding wire 41 on the welding wire reel 4 to move in the guide tube 5, the welding wire 41 in the guide tube 5 extends out of the guide tube 5 and the end is laid on the weld seam, the laser irradiates the end of the welding wire 41 to melt the welding wire 41; the driving mechanism 7 drives the roller 63 to move, and the roller 63 in the two sliding grooves 62 slides toward the guide tube 5. The rollers 63 are pressed on the welding wire 41, and the rollers 63 drive the welding wire 41 to move forward, and each sliding groove 62 has a plurality of rollers 63, and the rollers 63 located in the sliding groove 62 are all pressed on the welding wire 41, and synchronously drive the welding wire 41 to move forward. When one pair of rollers 63 slips, the remaining rollers 63 still drive the welding wire 41 to move forward, so that the speed at which the welding wire 41 is output from the guide tube 5 is more uniform, and it is not easy to have a welding defect. The weld is completely welded, thereby improving the sealing of the cold plate 01.

[0055] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. An automatic laser welding robot for the annular seam of upper and lower cold plates, characterized by: The invention comprises a robot arm (1), a mounting frame (2), a laser (3), a reel (4) and a guide tube (5); the mounting frame (2) is mounted on the output end of the robot arm (1); the reel (4) is mounted on one side of the mounting frame (2) and close to the output end of the robot arm (1); a welding wire (41) is wound on the reel (4); a connecting block (21) is mounted on the mounting frame (2); the guide tube (5) is passed through the connecting block (21) and is fixedly installed; the end of the guide tube (5) faces the weld formed between the upper cover plate (011) and the lower flow channel plate (012); the welding wire (41) is passed through the guide tube (5); the end face of the guide tube (5) close to the reel (4) is connected to two first arc plates (51), the inner side of the first arc plate (51) is in close contact with the surface of the welding wire (41); the first arc plate (51) is far away from the end face of the guide tube (5); the inner side of the first arc plate (51) is in close contact with the surface of the welding wire (41); the inner side of the first arc plate (51) is far away from the end face of the guide tube (5); the inner side of the first arc plate (51) is close to the surface of the welding wire (41 ... A transmission block (6) is connected to the end face of the guide tube (5), and a transmission hole (61) for the welding wire (41) to pass through is provided in the transmission block (6). Two sliding grooves (62) passing through both ends are provided in the transmission block (6), and the two sliding grooves (62) are symmetrically arranged about the transmission hole (61) and are connected to the transmission hole (61); a group of rollers (63) slide in each sliding groove (62), and each group of adjacent rollers (63) are connected to form a circle by a rope (64); the rollers (63) located in the sliding groove (62) are squeezed on the welding wire (41), and a driving mechanism (7) for driving the rollers (63) to slide in the sliding groove (62) is installed on the connecting block (21); the laser (3) is installed on the mounting frame (2), and the laser of the laser (3) irradiates the end of the welding wire (41).

2. The automatic laser welding robot for the upper and lower cold plate annular seams according to claim 1 is characterized in that: A rotating shaft (631) is provided in the roller (63), and two ends of the rotating shaft (631) extend out of the two ends of the roller (63). A rolling groove (65) for the rotating shaft (631) to roll is provided in the transmission block (6).

3. The automatic laser welding robot for the annular seam of upper and lower cold plates according to claim 1 is characterized in that: The driving mechanism (7) comprises a turntable (71), a rotating shaft (72) and a driving assembly (73); support blocks (66) are installed on both sides of the transmission block (6); the outer surface of the support block (66) is an inclined surface, and the roller (63) rolls on the outer surface of the support block (66); a first support plate (661) is connected to one side of the support block (66), and both ends of the first support plate (661) extend to the side of the support block (66); two rotating shafts (72) are provided, and the two rotating shafts (72) are respectively The two support blocks (66) are rotatably connected to the two ends of the first support plate (661); two turntables (71) are provided, and the two turntables (71) are coaxially connected to the ends of the rotating shaft (72); the ends of the two support blocks (66) are both provided with a notch (662) for the turntable (71) to rotate, and the circumference of the turntable (71) is evenly provided with a plurality of slots (711) for clamping the roller (63); the driving component (73) is installed on the connecting block (21), and the driving component (73) is used to drive the rotating shaft (72) to rotate.

4. The automatic laser welding robot for the annular seam of upper and lower cold plates according to claim 3 is characterized by: The driving assembly (73) includes a worm gear (731), a worm (732) and a motor (733); two worm gears (731) are provided, and the two worm gears (731) are coaxially connected to the end of the rotating shaft (72); the side of the first support plate (661) is connected to the second support plate (734), and the second support plate (734) is rotatably connected to the connecting rod (735); two worm gears (732) are provided, and the two worm gears (732) are connected by the connecting rod (735), and the two worm gears (732) are spirally connected. On the contrary, the two worms (732) are respectively engaged with the two worm wheels (731); the side of the connecting block (21) close to the second support plate (734) is connected to the third support plate (736); the end of the third support plate (736) is connected to the fourth support plate (737); one end of the fourth support plate (737) is connected to the end surface of the second support plate (734); the motor (733) is installed on the side of the third support plate (736), and the output shaft of the motor (733) is connected to the end of one of the worms (732).

5. The automatic laser welding robot for the annular seam of upper and lower cold plates according to claim 1 is characterized in that: The end of the guide tube (5) is sleeved with a gas guide column (8), an annular air cavity (81) is provided in the gas guide column (8), and the peripheral surface of the end of the gas guide column (8) close to the connecting block (21) is connected with a gas connection pipe (82), and the gas connection pipe (82) is used to connect a gas cylinder of an inert gas; the end surface of the gas guide column (8) away from the connecting block (21) is provided with an annular groove (83), the annular groove (83) is connected with the annular air cavity (81), the width of the annular groove (83) gradually increases from the inside to the outside, and the annular groove (83) is arranged to be inclined outward; the end surface of the gas guide column (8) is provided with an annular air outlet (84), and the annular air outlet (84) is located in the annular groove (83).

6. The automatic laser welding robot for the annular seam of upper and lower cold plates according to claim 1 is characterized in that: The end surface of the transmission block (6) away from the first curved plate (51) is connected to two second curved plates (67), and the inner side surfaces of the two second curved plates (67) are closely attached to the surface of the welding wire (41); the end surfaces of the two second curved plates (67) away from the transmission block (6) are connected to a straightening tube (68), the welding wire (41) passes into the straightening tube (68), and the inner wall of the straightening tube (68) is attached to the surface of the welding wire (41).

7. The automatic laser welding robot for the annular seam of upper and lower cold plates according to claim 1 is characterized in that: A first connecting plate (23) is connected to the side of the mounting frame (2) close to the reel (4), a first fine-tuning slider (24) is installed on the side of the connecting plate, a second fine-tuning slider (25) is installed on the first fine-tuning slider (24), and a second connecting plate (26) is installed on the second fine-tuning slider (25), and the movement direction of the second fine-tuning slider (25) driven by the first fine-tuning slider (24) is perpendicular to the movement direction of the second fine-tuning slider (25) driven by the second fine-tuning slider (25); the second connecting plate (26) is U-shaped, and two groups of lasers (3) are provided, each group having three lasers, and the two groups of lasers (3) are respectively installed at two ends of the second connecting plate (26), and the laser directions of the two groups of lasers (3) are one point.

8. The automatic laser welding robot for the annular seam of upper and lower cold plates according to claim 7, characterized in that: A lens (31) is installed at the emission end of each group of lasers (3), wherein a lens (311) is provided inside the lens (31), and the laser is irradiated onto the end of the welding wire (41) through the lens (311); an exhaust pipe (312) is installed on the side of the lens (31) through a plate, and the exhaust pipe (312) is located below one side of the lens (31), and a plurality of exhaust holes (3121) are provided on the side of the exhaust pipe (312) close to the lens (311).

9. The automatic laser welding robot for the annular seam of upper and lower cold plates according to claim 1, characterized in that: A second support frame (28) is installed on the mounting frame (2), and the second support frame (28) is a plate. One end of the second support frame (28) is connected to the mounting frame (2), and the other end of the second support frame (28) is bent downward. A smoke exhaust pipe (281) is installed at the bottom end of the second support frame (28), one end of the smoke exhaust pipe (281) faces the welding position of the welding wire (41), and the other end of the smoke exhaust pipe (281) is connected to the fan.

10. The automatic laser welding robot for the annular seam of upper and lower cold plates according to claim 1, characterized in that: The mounting frame (2) is connected with a sleeve (29), a sliding rod (291) is slid in the sleeve (29), a positioning pin (292) is passed through the sliding rod (291), and both ends of the positioning pin (292) extend out of the sliding rod (291); a strip hole (293) for the positioning pin (292) to slide is provided on the sleeve (29); the sleeve (29) is connected with a knob (294), and the end of the knob (294) is pressed against the circumference of the sliding rod (291); the end of the sleeve (29) is closed, and a spring (295) is provided in the sleeve (29), one end of the spring (295) is pressed against the end of the sliding rod (291), and the other end of the spring (295) is pressed against the closed end of the sleeve (29); one side of the connecting block (21) is connected to the end of the sliding rod (291) away from the mounting frame (2) through a bolt thread.

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