Laser welding device for sealing round pipe

Abstract

The laser welding device comprises a machine base, a rotating mechanism, a pressing mechanism and a welding mechanism, the rotating mechanism comprises a sliding base, a first driving piece, a rotating shaft, two first rotating wheels and two second rotating wheels, the first rotating wheels correspond to the second rotating wheels one to one, and the first rotating wheels and the second rotating wheels are located on the two opposite sides of the machine base respectively. The two first rotating wheels are rotationally connected to the sliding seat, the first driving piece is used for driving the first rotating wheels to rotate, the two second rotating wheels are rotationally connected to the machine seat, the sliding seat is slidably connected to the machine seat and can slide in the axial direction of the first rotating wheels, the rotating shaft is rotationally connected to the sliding seat, and the end of the rotating shaft can abut against the sealing piece; the pressing mechanism comprises a pressing wheel and a second driving piece, and the second driving piece is used for driving the pressing wheel to ascend and descend; the welding mechanism comprises a laser welding gun, and the laser welding gun is used for emitting a laser beam to weld the round pipe and the sealing piece. The welding efficiency and quality can be improved, and the device is suitable for sealing welding of round pipes with different lengths.

Description

Technical Field

[0001] The utility model relates to the technical field of laser welding equipment, in particular to a laser welding device for sealing round tubes. Background Art

[0002] Laser welding uses a high-energy laser beam emitted by a laser to irradiate the surface of the workpiece, converting light energy into heat energy to melt the irradiated material, thereby achieving joint surface welding. The round tubes cut to a fixed length need to be sealed, that is, the sealing piece is welded to the tube mouth of the round tube by laser welding to seal the tube mouth. The existing laser welding devices for sealing round tubes have low welding efficiency and welding accuracy, and can only be used for sealing welding of round tubes of fixed length, and have low versatility. Utility Model Content

[0003] The utility model aims to solve one of the technical problems in the related art at least to a certain extent. To this end, the utility model provides a laser welding device for sealing a round tube, which can automatically rotate the round tube and laser weld the sealing sheet along the circumference of the round tube to improve the welding efficiency and welding accuracy, and can be applicable to the sealing welding of round tubes of different lengths.

[0004] According to an embodiment of the utility model, a laser welding device for sealing a round tube is provided, comprising a machine base, a rotating mechanism, a clamping mechanism and a welding mechanism, wherein the rotating mechanism comprises a slide, a first driving member, a rotating shaft, two first rotating wheels and two second rotating wheels, wherein the first rotating wheels correspond to the second rotating wheels one by one, the first rotating wheels and the second rotating wheels are respectively located on opposite sides of the machine base, the two first rotating wheels are both rotatably connected to the slide, the two first rotating wheels can cooperate to support the round tube and the sealing sheet, the first driving member is used to drive the first rotating wheel to rotate, and the two second rotating wheels are both rotatably connected to the machine base, The two second rotating wheels cooperate to support the round tube, the slide is slidably connected to the machine base, the slide can slide along the axial direction of the first rotating wheel toward or away from the second rotating wheel, the rotating shaft is rotatably connected to the slide, and the rotating shaft is located above the first rotating wheel, and the end of the rotating shaft can abut against the sealing sheet; the clamping mechanism includes a pressing wheel and a second driving member, the pressing wheel is located above the first rotating wheel, and the second driving member is used to drive the pressing wheel to move up and down; the welding mechanism includes a laser welding gun, and the laser welding gun is used to emit a laser beam to weld the round tube and the sealing sheet.

[0005] A laser welding device for sealing a circular tube according to an embodiment of the utility model has at least the following beneficial effects: one end of the circular tube is placed between two first rotating wheels, one end of the circular tube is supported by the cooperation of the two first rotating wheels, and the other end of the circular tube is placed between two second rotating wheels, the other end of the circular tube is supported by the cooperation of the two second rotating wheels, and at the same time, a sealing sheet is placed between the two first rotating wheels, the sealing sheet is supported by the cooperation of the two first rotating wheels, and the sealing sheet is fixed from both sides of the sealing sheet by the rotating shaft and the circular tube respectively, and then, the pressing wheel is driven to descend by the second driving member to press the circular tube, and the first rotating wheel is driven to rotate by the first driving member, and the circular tube and the sealing sheet are driven to rotate synchronously, because the rotating shaft is rotatably connected to the slide seat, the rotating shaft can rotate synchronously with the sealing sheet to reduce the rotational resistance of the sealing sheet, and while the circular tube rotates, a laser beam is emitted by the laser welding gun to weld the circular tube and the sealing sheet, and the circumference of the circular tube can be automatically laser welded to seal, thereby improving the welding efficiency and quality. In addition, by sliding the slide seat along the axial direction of the first rotating wheel toward or away from the second rotating wheel, the axial distance between the first rotating wheel and the second rotating wheel can be adjusted, so as to adapt to the support and positioning of round tubes of different lengths for welding, thereby improving versatility.

[0006] According to some embodiments of the utility model, the machine base is provided with a first guide rail, the first guide rail is arranged along the axial direction of the first rotating wheel, and the sliding seat is slidably connected to the first guide rail.

[0007] According to some embodiments of the utility model, the clamping mechanism also includes a support plate and a cross bar, the support plate is slidably connected to the machine base, the support plate can slide along the axial direction of the first rotating wheel, the fixed end of the second driving member is connected to the support plate, the cross bar is connected to the movable end of the second driving member, and the pressing wheel is rotatably connected to the cross bar.

[0008] According to some embodiments of the utility model, the support plate is provided with a vertical guide rod, and the cross rod is slidably connected to the guide rod.

[0009] According to some embodiments of the utility model, the rotating mechanism also includes a support block, which is connected to the machine base, and the support block is located between the first rotating wheel and the second rotating wheel. The support block is provided with a conical guide hole, and the conical guide hole is arranged axially parallel to the first rotating wheel, and the aperture of the conical guide hole gradually decreases along the axial direction approaching the first rotating wheel.

[0010] According to some embodiments of the utility model, the rotating mechanism also includes a fixed seat and an adjusting block, the fixed seat is connected to the machine base, the adjusting block is slidably connected to the fixed seat, the adjusting block can be lifted and slid, and the two second rotating wheels are both rotatably connected to the adjusting block.

[0011] According to some embodiments of the utility model, the welding mechanism also includes a first slide bar, a second slide bar, a third driving member and a fourth driving member, the first slide bar is slidably connected to the machine base, the third driving member is used to drive the first slide bar to move along the axial direction of the first rotating wheel, the second slide bar is slidably connected to the first slide bar, the fourth driving member is used to drive the second slide bar to vertically lift and lower movement, and the laser welding gun is connected to the second slide bar.

[0012] According to some embodiments of the utility model, the machine base is provided with a second guide rail, the second guide rail is arranged along the axial direction of the first rotating wheel, the first sliding rod is slidably connected to the second guide rail, the first sliding rod is provided with a guide groove, the guide groove is arranged along the vertical direction, and the second sliding rod is slidably connected to the guide groove.

[0013] According to some embodiments of the utility model, the welding mechanism further includes a safety light curtain and a controller, the safety light curtain is arranged on a side of the machine base for picking up and placing workpieces, and the safety light curtain and the laser welding gun are both electrically connected to the controller.

[0014] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0016] Figure 1 This is a schematic diagram of the structure of the laser welding device for sealing a round tube after the pressing mechanism is hidden in the embodiment of the utility model;

[0017] Figure 2 1 is a top view of a laser welding device for sealing a round tube according to an embodiment of the utility model;

[0018] Figure 3 yes Figure 2 A partial enlarged view of the middle A;

[0019] Figure 4 This is a schematic diagram of the structure of the laser welding device for sealing a round tube according to an embodiment of the utility model after the support block is hidden;

[0020] Figure 5 yes Figure 4 A partial enlarged view of point B in the middle;

[0021] Figure 6 It is a partial schematic diagram of the rotating mechanism of the laser welding device for sealing a round tube according to an embodiment of the utility model;

[0022] Figure 7 This is another partial schematic diagram of the rotating mechanism of the laser welding device for sealing a round tube according to an embodiment of the utility model;

[0023] Figure 8 It is a cross-sectional view of a support block of a laser welding device for sealing a round tube according to an embodiment of the utility model.

[0024] Description of reference numerals:

[0025] A machine base 100, a first guide rail 110, and a second guide rail 120;

[0026] Rotating mechanism 200, sliding seat 210, first driving member 220, rotating shaft 230, first rotating wheel 240, second rotating wheel 250, supporting block 260, tapered guide hole 261, fixing seat 270, adjusting block 280;

[0027] The clamping mechanism 300, the pressing wheel 310, the second driving member 320, the supporting plate 330, the cross bar 340, and the guide bar 350;

[0028] Welding mechanism 400 , laser welding gun 410 , first sliding bar 420 , guide groove 421 , second sliding bar 430 , third driving member 440 , fourth driving member 450 , safety light curtain 460 . DETAILED DESCRIPTION

[0029] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0030] In the description of the present invention, it should be understood that descriptions involving orientation, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0031] In the description of the present utility model, "several" means one or more, "more" means more than two, "greater than", "less than", "exceed" etc. are understood to exclude the number itself, and "above", "below", "within" etc. are understood to include the number itself. If there is a description of "first" or "second", it is only used for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0032] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0033] It is understandable that, referring to Figures 1 to 7 The utility model is a laser welding device for sealing a round tube, comprising a machine base 100, a rotating mechanism 200, a pressing mechanism 300 and a welding mechanism 400. The rotating mechanism 200 comprises a slide 210, a first driving member 220, a rotating shaft 230, two first rotating wheels 240 and two second rotating wheels 250. The first rotating wheels 240 correspond to the second rotating wheels 250 one by one. The first rotating wheels 240 and the second rotating wheels 250 are respectively located on opposite sides of the machine base 100. The two first rotating wheels 240 are both rotatably connected to the slide 210. The two first rotating wheels 240 can cooperate to support the round tube and the sealing sheet. The first driving member 220 is used to drive the first rotating wheel 240 to rotate. The two second rotating wheels 250 are both rotatably connected to The machine base 100 and the two second rotating wheels 250 cooperate to support the round tube. The slide 210 is slidably connected to the machine base 100. The slide 210 can slide along the axial direction of the first rotating wheel 240 toward or away from the second rotating wheel 250. The rotating shaft 230 is rotatably connected to the slide 210, and the rotating shaft 230 is located above the first rotating wheel 240. The end of the rotating shaft 230 can abut against the sealing sheet. The clamping mechanism 300 includes a pressing wheel 310 and a second driving member 320. The pressing wheel 310 is located above the first rotating wheel 240. The second driving member 320 is used to drive the pressing wheel 310 to move up and down. The welding mechanism 400 includes a laser welding gun 410. The laser welding gun 410 is used to emit a laser beam to weld the round tube and the sealing sheet.

[0034] One end of the round tube is placed between the two first rotating wheels 240, and the two first rotating wheels 240 cooperate to support one end of the round tube, and the other end of the round tube is placed between the two second rotating wheels 250, and the two second rotating wheels 250 cooperate to support the other end of the round tube. At the same time, a sealing sheet is placed between the two first rotating wheels 240, and the two first rotating wheels 240 cooperate to support the sealing sheet, and the rotating shaft 230 and the round tube are respectively used to abut and fix the sealing sheet from both sides of the sealing sheet, and then, the second driving member 3 is used to drive the sealing sheet to rotate. 20 drives the pressing wheel 310 to move downward to compress the round tube, and drives the first rotating wheel 240 to rotate through the first driving member 220, and drives the round tube and the sealing sheet to rotate synchronously. Since the rotating shaft 230 is rotatably connected to the slide 210, the rotating shaft 230 can rotate synchronously with the sealing sheet to reduce the rotation resistance of the sealing sheet. While the round tube rotates, the laser welding gun 410 emits a laser beam to weld the round tube and the sealing sheet, and can automatically perform laser welding on the circumference of the round tube to seal, thereby improving welding efficiency and quality. In addition, by sliding the slide 210 along the axial direction of the first rotating wheel 240 toward or away from the second rotating wheel 250, the axial distance between the first rotating wheel 240 and the second rotating wheel 250 can be adjusted, so that the support positioning of round tubes of different lengths can be adapted for welding, which can improve versatility.

[0035] It should be noted that the radial spacing between the two first wheels 240 is smaller than the diameter of the circular tube, so that one end of the circular tube can be clamped between the two first wheels 240 to support the circular tube, and the radial spacing between the two second wheels 250 is smaller than the diameter of the circular tube, so that the other end of the circular tube can be clamped between the two second wheels 250 to support the circular tube.

[0036] After welding is completed, the pressing wheel 310 is driven upward by the second driving member 320, so that the round tube can be easily taken out.

[0037] After the slide seat 210 moves to a preset position along the axial direction of the first rotating wheel 240 , the position can be fixed by fasteners such as bolts or latches.

[0038] Since the two first rotating wheels 240 can cooperate to support the round tube and the sealing piece, and the round tube cooperates with the rotating shaft 230 to fix the sealing piece, when the first rotating wheel 240 rotates, it can drive the round tube and the sealing piece to rotate synchronously, and when the round tube starts to rotate, the laser beam emitted by the laser welding gun 410 can form an initial welding point between the round tube and the sealing piece, and the round tube and the sealing piece are fixedly connected through the initial welding point, so that the round tube can drive the sealing piece to rotate.

[0039] The first driving member 220 can simultaneously drive the two first rotating wheels 240 to rotate in the same direction through a sprocket mechanism or a pulley mechanism, thereby increasing the driving force on the round tube and the sealing sheet to improve the rotation stability of the round tube and the sealing sheet.

[0040] The first driving member 220 may be a servo motor or a stepping motor, etc., which can drive the first rotating wheel 240 to rotate. The second driving member 320 may be a cylinder, an oil cylinder or a linear slide module, etc., which can drive the pressure wheel 310 to move up and down.

[0041] It is understandable that, referring to Figure 1 and Figure 2 The base 100 is provided with a first guide rail 110, which is arranged along the axial direction of the first rotating wheel 240, and the slide 210 is slidably connected to the first guide rail 110. The first guide rail 110 guides the slide 210 to slide along the axial direction of the first rotating wheel 240, and drives the first rotating wheel 240 to move, so that the position deviation of the slide 210 can be reduced, so as to improve the stability of the movement of the first rotating wheel 240, thereby improving the accuracy of the position adjustment of the first rotating wheel 240.

[0042] It is understandable that, referring to Figure 4 and Figure 5 The clamping mechanism 300 also includes a support plate 330 and a cross bar 340. The support plate 330 is slidably connected to the base 100. The support plate 330 can slide along the axial direction of the first rotating wheel 240. The fixed end of the second driving member 320 is connected to the support plate 330. The cross bar 340 is connected to the movable end of the second driving member 320. The pressing wheel 310 is rotatably connected to the cross bar 340. The second driving member 320 drives the cross bar 340 to move up and down, and drives the pressing wheel 310 to move up and down, so that the pressing wheel 310 presses down or separates from the round tube. Since the pressing wheel 310 is rotatably connected to the cross bar 340, the cross bar 340 is used to support the lifting and lowering of the pressing wheel 310, which can improve the lifting and lowering stability of the pressing wheel 310. Moreover, since the support plate 330 is slidably connected to the machine base 100, the support plate 330 slides along the axial direction of the first rotating wheel 240 and drives the pressing wheel 310 to move, and the position of the pressing wheel 310 can be adjusted to adapt to the adjustment position of the first rotating wheel 240, thereby adapting to the pressing and positioning of round tubes of different lengths.

[0043] Specifically, refer to Figure 4 and Figure 5 The support plate 330 is provided with a vertical guide rod 350, and the cross rod 340 is slidably connected to the guide rod 350. The guide rod 350 guides the cross rod 340 to move vertically up and down, thereby driving the pressing wheel 310 to move up and down, which can improve the stability of the pressing wheel 310's lifting and lowering movement, thereby reducing the possibility of the round tube being loosened when the pressing wheel 310 presses down the round tube, thereby improving the stability of welding.

[0044] It is understandable that, referring to Figure 1 , Figure 6 and Figure 8The rotating mechanism 200 further includes a support block 260, which is connected to the base 100 and is located between the first rotating wheel 240 and the second rotating wheel 250. The support block 260 is provided with a tapered guide hole 261, which is arranged axially parallel to the first rotating wheel 240, and the aperture of the tapered guide hole 261 gradually decreases in the axial direction toward the first rotating wheel 240. Since the tapered guide hole 261 is arranged axially parallel to the first rotating wheel 240, and the aperture of the tapered guide hole 261 gradually decreases in the axial direction toward the first rotating wheel 240, when the round tube is moved and placed from one side of the second rotating wheel 250 to one side of the first rotating wheel 240, the round tube can pass through the tapered guide hole 261, and the wall surface of the tapered guide hole 261 gradually guides the round tube to be straightened and aligned with the sealing piece, so as to improve the coaxiality of the round tube and the sealing piece, thereby improving the welding accuracy.

[0045] It is understandable that, referring to Figures 4 to 6 The rotating mechanism 200 further includes a fixed seat 270 and an adjusting block 280. The fixed seat 270 is connected to the machine base 100. The adjusting block 280 is slidably connected to the fixed seat 270. The adjusting block 280 can be lifted and slid. Both second rotating wheels 250 are rotatably connected to the adjusting block 280. By lifting and sliding the adjusting block 280, the two second rotating wheels 250 are driven to move up and down, thereby adjusting the height position of the second rotating wheels 250 to adjust the positioning height position of one end of the round tube, so that the round tube is horizontal and aligned with the sealing piece, which can improve the coaxiality between the round tube and the sealing piece, thereby improving the welding accuracy.

[0046] It should be noted that after the adjustment block 280 is lifted, slid, and moved to a preset position, the position can be fixed by fasteners such as bolts or latches.

[0047] It is understandable that, referring to Figure 1The welding mechanism 400 also includes a first slide bar 420, a second slide bar 430, a third driving member 440 and a fourth driving member 450. The first slide bar 420 is slidably connected to the machine base 100. The third driving member 440 is used to drive the first slide bar 420 to move axially along the first rotating wheel 240. The second slide bar 430 is slidably connected to the first slide bar 420. The fourth driving member 450 is used to drive the second slide bar 430 to move vertically up and down. The laser welding gun 410 is connected to the second slide bar 430. Since the second slide bar 430 is slidably connected to the first slide bar 420, the laser welding gun 410 is connected to the second slide bar 430, and the first slide bar 420 is driven to move axially along the first rotating shaft 230 by the third driving member 440, and the first slide bar 420 drives the second slide bar 430 and the laser welding gun 410 to move, and the axial position of the laser welding gun 410 along the first rotating shaft 230 can be adjusted, so as to adapt to the sealing welding of sealing sheets of different thicknesses, so as to improve the applicability and welding accuracy of the laser welding device for sealing the round tube, and the second slide bar 430 is driven to move vertically by the fourth driving member 450, so as to drive the laser welding gun 410 to move up and down, so as to adjust the height position of the laser welding gun 410, and the distance between the laser welding gun 410 and the round tube can be adjusted according to the welding requirements to improve the welding quality. In addition, after the laser welding gun 410 rises, the placement space of the sealing sheet and the round tube can be increased, so as to facilitate the placement of the sealing sheet and the round tube.

[0048] It should be noted that the third driving member 440 and the fourth driving member 450 can be air cylinders, oil cylinders or linear slide modules, etc., which can drive the first slide bar 420 and the second slide bar 430 to perform corresponding actions.

[0049] Specifically, refer to Figure 1 The machine base 100 is provided with a second guide rail 120, which is arranged along the axial direction of the first rotating wheel 240. The first slide bar 420 is slidably connected to the second guide rail 120. The first slide bar 420 is provided with a guide groove 421, which is arranged along the vertical direction. The second slide bar 430 is slidably connected to the guide groove 421. The first slide bar 420 is guided to slide along the axial direction of the first rotating shaft 230 by the second guide rail 120, and the second slide bar 430 is guided to slide up and down in the vertical direction by the guide groove 421, so that the position deviation of the first slide bar 420 and the second slide bar 430 during the sliding process can be reduced, so as to improve the stability of the movement of the first slide bar 420 and the second slide bar 430, thereby improving the stability of the movement of the laser welding gun 410.

[0050] It is understandable that, referring to Figure 1The welding mechanism 400 further includes a safety light curtain 460 and a controller. The safety light curtain 460 is arranged on the side of the machine base 100 where the workpiece is placed. The safety light curtain 460 and the laser welding gun 410 are both electrically connected to the controller. The safety light curtain 460 detects whether the operator is in the state of placing the workpiece. Since the safety light curtain 460 and the laser welding gun 410 are both electrically connected to the controller, when it is detected that the operator is in the state of placing the workpiece, the safety light curtain 460 feeds back a signal to the controller, and the controller controls the laser welding gun 410 to stop working, which can reduce the risk of the laser welding gun 410 accidentally injuring the operator when placing the material, thereby improving the safety of use.

[0051] The embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge scope of ordinary technicians in the relevant technical field without departing from the purpose of the present invention.

Claims

1. A laser welding device for sealing a round tube, characterized in that: include: Machine base; The rotating mechanism comprises a slide, a first driving member, a rotating shaft, two first rotating wheels and two second rotating wheels, the first rotating wheel and the second rotating wheels corresponding to each other one by one, the first rotating wheel and the second rotating wheel are respectively located at opposite sides of the machine base, the two first rotating wheels are both rotatably connected to the slide, the two first rotating wheels can cooperate to support the round tube and the sealing sheet, the first driving member is used to drive the first rotating wheel to rotate, the two second rotating wheels are both rotatably connected to the machine base, the two second rotating wheels cooperate to support the round tube, the slide is slidably connected to the machine base, the slide can slide along the axial direction of the first rotating wheel toward or away from the second rotating wheel, the rotating shaft is rotatably connected to the slide, and the rotating shaft is located above the first rotating wheel, and the end of the rotating shaft can abut against the sealing sheet; A clamping mechanism, comprising a pressing wheel and a second driving member, wherein the pressing wheel is located above the first rotating wheel, and the second driving member is used to drive the pressing wheel to move up and down; The welding mechanism comprises a laser welding gun, and the laser welding gun is used to emit a laser beam to weld the round tube and the sealing sheet.

2. The laser welding device for sealing a round tube according to claim 1, characterized in that: The machine base is provided with a first guide rail, the first guide rail is arranged along the axial direction of the first rotating wheel, and the sliding seat is slidably connected to the first guide rail.

3. The laser welding device for sealing a round tube according to claim 1, characterized in that: The clamping mechanism also includes a support plate and a cross bar, the support plate is slidably connected to the machine base, the support plate can slide along the axial direction of the first rotating wheel, the fixed end of the second driving member is connected to the support plate, the cross bar is connected to the movable end of the second driving member, and the pressure wheel is rotatably connected to the cross bar.

4. The laser welding device for sealing a round tube according to claim 3, characterized in that: The support plate is provided with a vertical guide rod, and the cross rod is slidably connected to the guide rod.

5. The laser welding device for sealing a round tube according to claim 1, characterized in that: The rotating mechanism also includes a support block, which is connected to the machine base and located between the first rotating wheel and the second rotating wheel. The support block is provided with a conical guide hole, which is arranged axially parallel to the first rotating wheel, and the aperture of the conical guide hole gradually decreases axially toward the first rotating wheel.

6. The laser welding device for sealing a round tube according to claim 1, characterized in that: The rotating mechanism also includes a fixed seat and an adjusting block, wherein the fixed seat is connected to the machine base, the adjusting block is slidably connected to the fixed seat, the adjusting block can be lifted and slid, and the two second rotating wheels are both rotatably connected to the adjusting block.

7. The laser welding device for sealing a round tube according to claim 1, characterized in that: The welding mechanism also includes a first slide bar, a second slide bar, a third driving member and a fourth driving member. The first slide bar is slidably connected to the machine base, the third driving member is used to drive the first slide bar to move along the axial direction of the first rotating wheel, the second slide bar is slidably connected to the first slide bar, the fourth driving member is used to drive the second slide bar to vertically lift and lower, and the laser welding gun is connected to the second slide bar.

8. The laser welding device for sealing a round tube according to claim 7, characterized in that: The base is provided with a second guide rail, the second guide rail is arranged along the axial direction of the first rotating wheel, the first sliding rod is slidably connected to the second guide rail, the first sliding rod is provided with a guide groove, the guide groove is arranged along the vertical direction, and the second sliding rod is slidably connected to the guide groove.

9. The laser welding device for sealing a round tube according to claim 1, characterized in that: The welding mechanism also includes a safety light curtain and a controller. The safety light curtain is arranged on a side of the machine base for picking up and placing workpieces. The safety light curtain and the laser welding gun are both electrically connected to the controller.

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