A laser welding device for steel pipes

Abstract

The application discloses a steel pipe laser welding device, and relates to the technical field of steel pipe welding.The device comprises an operation table, a base is fixedly installed on the top of the operation table, a laser beam welding head is arranged on the top of the base, a driving device one is arranged on the top of the base, two guide rails are fixedly installed on the top of the base and the driving device one, two sliding plates are slidingly installed on the inner walls of the guide rails, a driving device two is arranged in the sliding plate, a rotating shaft one is rotatably installed on the surface of one of the sliding plates, a servo motor is fixedly installed on the surface of the other sliding plate, a rotating shaft two is fixedly installed on the output end of the servo motor, two welding tables are fixedly installed on the side of the rotating shaft one and the rotating shaft two, the two welding tables are butted against each other, the steel pipes on the top of the welding tables are butted against each other, and the self-locking is completed after the butt joint is completed, so that the welding effect is prevented from being affected.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of steel pipe welding, in particular to a steel pipe laser welding device. BACKGROUND

[0002] The laser welding device of the steel pipe is a welding device that uses a laser beam to concentrate on the end of the steel pipe to cause the end of the steel pipe to melt, thereby welding two sections of steel pipe; it is widely used in high-precision and high-efficiency welding operations, especially in fields where the quality of steel pipe connection and welding is required to be high.

[0003] The patent with the patent announcement number CN216325977U relates to a weld welding device for welding steel pipes, and relates to the technical field of welding devices. The patent includes a welding machine body, a bottom plate fixedly connected to one side of the welding machine body, two support plates fixedly connected to the upper side of the bottom plate, a circular ring fixedly connected to one side of the support plate, grooves formed on the opposite sides of the two circular rings, a track car slidingly connected in the grooves, a slot formed on one side of the track car, a welding gun fixedly connected in the slot, and arc-shaped plates fixedly connected to the opposite sides of the track car. The welding gun is connected to a hose. The patent installs a track car on the circular ring and installs a laser beam welding gun on the track car, so that the steel pipe welding device can weld the gap of the steel pipe for one turn without rotating the steel pipe, greatly reducing the poor welding quality caused by the vibration generated when the steel pipe is rotated, thereby reducing the waste of production materials caused by such situations.

[0004] In the above-mentioned patent, a track car is installed on the circular ring, and a laser beam welding gun is installed on the track car, so that the steel pipe welding device can weld the gap of the steel pipe for one turn without rotating the steel pipe, greatly reducing the poor welding quality caused by the vibration generated when the steel pipe is rotated. However, before laser beam welding of the two sections of steel pipe, the two sections of steel pipe need to be butt jointed, and the end of the steel pipe that is connected to each other needs to be kept flat during laser beam welding, otherwise it will affect the strength and hardness of the steel pipe after welding, affecting normal use. SUMMARY

[0005] In view of the deficiencies of the prior art, the present application provides a steel pipe laser welding device that solves the problems raised in the background art.

[0006] To achieve the above purpose, the present application is implemented by the following technical scheme: a steel pipe laser welding device, comprising an operation table, a base fixedly installed on the top of the operation table, a laser beam welding head provided on the top of the base, and a butt joint device provided on the top of the base.

[0007] The docking device comprises a driving device one, two guide rails, two sliding plates, a rotating shaft one, two welding tables, a servo motor, a rotating shaft two, a lock tongue, a limiting triangular and a lock core, the driving device one is arranged on the top of the base, the two guide rails are fixedly installed on the top of the base and the driving device one, the two sliding plates are slidingly installed on the inner wall of the guide rail, the driving device two is arranged in the sliding plate, the rotating shaft one is rotatably installed on the surface of one of the sliding plates, the servo motor is fixedly installed on the surface of the other sliding plate, the rotating shaft two is fixedly installed on the output end of the servo motor, the two welding tables are fixedly installed on the side of the rotating shaft one and the rotating shaft two, the lock tongue is fixedly installed on the bottom of one of the welding tables, the surface of the lock tongue is provided with a receiving groove, the limiting triangular is slidingly installed on the inner wall of the receiving groove, and the lock core is fixedly installed on the bottom of the other welding table; when the limiting triangular is no longer in contact with the lock core, the limiting triangular is driven to move away from the receiving groove by the spring, and the limiting triangular is limited by the lock core after moving, so that the limiting triangular can no longer continue to move.

[0008] The top of the base is provided with a clamping device for positioning the steel pipe and an inner support device for supporting the steel pipe.

[0009] According to the above technical scheme, the docking device further comprises a concave block, a circular telescopic rod, a backing plate, an unlocking block, a transmission block one, a transmission block two, a connecting rod and a sliding convex block, the concave block is fixedly installed on the top of the base, the circular telescopic rod is fixedly installed on the top of the base, the backing plate is fixedly installed on the top of the free end of the circular telescopic rod, the unlocking block is slidingly installed on the top of the concave block, the transmission block one is fixedly installed on the bottom of the unlocking block, the bottom of the transmission block one is provided with a sliding groove, the sliding convex block is slidingly installed on the inner wall of the sliding groove, the transmission block two is fixedly installed on the bottom of the sliding convex block, one end of the connecting rod is fixedly installed on the bottom of the backing plate, and the other end of the connecting rod is fixedly installed on the bottom of the transmission block two; the unlocking block is in contact with the limiting triangular when moving, the unlocking block drives the limiting triangular to move into the receiving groove when moving, and the limiting triangular is no longer limited by the lock core after moving.

[0010] According to the above technical scheme, a spring is arranged between the receiving groove and the limiting triangular, the limiting triangular is in contact with the lock core, and the limiting triangular is reset by the spring.

[0011] According to the technical scheme, the clamping device comprises a fixed seat, a fixed ring, a fixed shaft, a rotating rod, a rotating ring and an elastic telescopic rod, the fixed seat is fixedly installed on the top of the welding table, the fixed ring is fixedly installed on the top of the fixed seat, the fixed shaft is fixedly installed on the side of the fixed ring close to each other, the circumferential surface of the fixed shaft is provided with a limiting groove, the rotating rod is rotatably installed on the circumferential surface of the fixed shaft, the rotating ring is rotatably installed on the side of the rotating rod away from the fixed ring, the elastic telescopic rod is slidably installed on the top of the fixed seat, the inside of the elastic telescopic rod is provided with a driving device three, and the free end of the elastic telescopic rod is rotatably installed on the surface of the rotating ring, so that the steel pipe with different diameters can be fixed, the arc-shaped clamping rod is closely combined with the steel pipe to reduce the shaking of the steel pipe during rotation, and the stability of the device during welding is improved.

[0012] According to the technical scheme, the clamping device further comprises an embedded rod, an arc-shaped clamping rod and a limiting block, the embedded rod is slidably installed in the inside of the rotating rod, the arc-shaped clamping rod is rotatably installed at the end of the embedded rod away from the fixed shaft, and the limiting block is fixedly installed at the end of the embedded rod away from the arc-shaped clamping rod, after the arc-shaped clamping rod contacts the steel pipe, the arc-shaped clamping rod moves to drive the embedded rod to move away from the steel pipe, the embedded rod moves to drive the limiting block to move towards the fixed shaft, and the movement of the limiting block will contact the limiting hole.

[0013] According to the technical scheme, the embedded rod and the rotating rod are provided with a second spring, the limiting block contacts the limiting hole, and the embedded rod is reset through the second spring.

[0014] According to the technical scheme, the supporting device comprises a supporting plate, a reset telescopic rod, a lifting plate, a supporting arc rod, a square telescopic rod, a transmission triangle, a transmission long rod and a rubber clamping block, the supporting plate is slidably installed on the top of the welding table, the reset telescopic rod is fixedly installed on the top of the supporting plate, the lifting plate is fixedly installed on the top of the reset telescopic rod, the supporting arc rod is fixedly installed on the top of the lifting plate, the square telescopic rod is slidably installed on the top of the fixed seat, the top of the fixed seat is fixedly installed with a reset block, the free end of the reset square telescopic rod is rotatably installed on the circumferential surface of the rotating ring, the transmission triangle is fixedly installed on the fixed end of the square telescopic rod, the transmission long rod is fixedly installed on the top of the supporting plate, and the rubber clamping block is fixedly installed on the top of the supporting arc rod, the movement of the supporting arc rod drives the rubber clamping block to move towards the top, the movement of the rubber clamping block will contact the steel pipe, and the steel pipe and the rubber clamping block rotate at the same time to keep relative stillness.

[0015] According to the technical scheme, the transmission triangle contacts the transmission long rod, the inside of the square telescopic rod is provided with a reset spring, and the free end of the square telescopic rod is reset through the reset spring.

[0016] The application provides a steel pipe laser welding device.

[0017] (1) The application, through the limiting triangular moving to be limited by the lock cylinder, makes the limiting triangular no longer continue to move, makes the two welding tables butt against each other, and drives the steel pipe at the top of the welding table to butt against each other, and completes self-locking after butt joint, prevents the gap between the steel pipes in the welding process, thereby affecting the welding effect, through the unlocking block moving to drive the limiting triangular to move to the inside of the storage groove, the limiting triangular moves and is no longer limited by the lock cylinder, so that after the welding is completed, the device will automatically contact the limiting, without manual operation, improves the automatic degree and working efficiency of the device.

[0018] (2) The application, through the arc-shaped clamping rod contacting the steel pipe and being pasted with the steel pipe through self-rotation, can fix different diameter steel pipes, and makes the arc-shaped clamping rod tightly paste with the steel pipe to reduce the shaking of the steel pipe during rotation, improves the stability of the device during welding, through the embedded rod moving to drive the limiting square block to move to the direction of the fixing shaft, the limiting square block moving will contact the limiting groove, so that the limiting square block can no longer continue to rotate, prevents the rotating rod from reversing due to gravity or centrifugal force during the rotation of the steel pipe, causes the positioning of the steel pipe to be invalid, improves the applicability of the device.

[0019] (3) The application, through the reset spring resetting to drive the lifting plate to move to the top, the lifting plate moving will drive the supporting arc rod to move to the top, the supporting arc rod moving will support the steel pipe, prevents the end close to each other from being inclined to the bottom due to gravity after fixing the two ends of the steel pipe, prevents the device from being damaged due to long time use, improves the service life of the device, through the supporting arc rod moving to drive the rubber clamping block to move to the top, the rubber clamping block moving will contact the steel pipe, since the steel pipe and the rubber clamping block rotate at the same time and keep relative stillness, the friction force generated after the rubber clamping block contacts the steel pipe will prevent the steel pipe from reversing due to the adhesion of the laser beam welding head during welding, improves the precision of welding. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 It is the whole structure schematic diagram of the application;

[0021] Figure 2 It is the top structure schematic diagram of the base of the application;

[0022] Figure 3 It is the lock tongue section structure schematic diagram of the application;

[0023] Figure 4 It is the butt joint device structure schematic diagram of the application;

[0024] Figure 5 It is the unlocking block section structure schematic diagram of the application;

[0025] Figure 6 This is a schematic diagram of the fixing device structure of the present invention;

[0026] Figure 7 This is a schematic diagram of the cross-sectional structure of the rotating rod of the present invention;

[0027] Figure 8 This is a schematic diagram of the support device structure of the present invention.

[0028] In the diagram: 1. Operating table; 2. Base; 3. Laser beam welding head; 41. Drive device one; 42. Guide rail; 43. Sliding plate; 44. Rotating shaft one; 45. Welding table; 46. Servo motor; 47. Rotating shaft two; 48. Lock tongue; 49. Limiting triangle; 410. Lock cylinder; 411. Concave block; 412. Circular telescopic rod; 413. Pad; 414. Unlocking block; 415. Spring number one; 416. Transmission block one; 417. Transmission block two; 4 18. Connecting rod; 419. Sliding protrusion; 51. Fixed seat; 52. Fixed ring; 53. Fixed shaft; 54. Rotating rod; 55. Rotating ring; 56. Elastic telescopic rod; 57. Embedded rod; 58. Arc-shaped clamping rod; 59. Limiting block; 61. Support plate; 62. Reset telescopic rod; 63. Lifting plate; 64. Support arc rod; 65. Square telescopic rod; 66. Transmission triangle; 67. Transmission long rod; 68. Rubber clamp; 69. Reset block. Detailed Implementation

[0029] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0030] Please see Figure 1 - Figure 5 One embodiment of the present invention is: a steel pipe laser welding device, including an operating table 1, a base 2 fixedly installed on the top of the operating table 1, a laser beam welding head 3 provided on the top of the base 2, and a docking device provided on the top of the base 2.

[0031] The docking device comprises a driving device 41, two guide rails 42, two sliding plates 43, a rotating shaft 44, two welding platforms 45, a servo motor 46, a rotating shaft 47, a locking tongue 48, a limiting triangular block 49 and a lock core 410. The driving device 41 is arranged on the top of the base 2. The two guide rails 42 are fixedly arranged on the top of the base 2 and the driving device 41. The two sliding plates 43 are slidingly arranged on the inner wall of the guide rail 42. The driving device 2 is arranged in the sliding plate 43. The rotating shaft 44 is rotatably arranged on the surface of one of the sliding plates 43. The servo motor 46 is fixedly arranged on the surface of the other sliding plate 43. The rotating shaft 47 is fixedly arranged on the output end of the servo motor 46. The two welding platforms 45 are fixedly arranged on the side of the rotating shaft 44 and the rotating shaft 47. The locking tongue 48 is fixedly arranged on the bottom of one of the welding platforms 45. The surface of the locking tongue 48 is provided with a receiving groove. The limiting triangular block 49 is slidingly arranged on the inner wall of the receiving groove. The lock core 410 is fixedly arranged on the bottom of the other welding platform 45. The two welding platforms 45 are butted with each other, and the steel pipes on the top of the welding platforms 45 are butted with each other. After the butting is completed, the self-locking is completed, so that the gap between the steel pipes is prevented from being generated during the laser welding, and the welding effect is affected.

[0032] The docking device further comprises a concave block 411, a circular telescopic rod 412, a backing plate 413, an unlocking block 414, a transmission block 416, a transmission block 417, a connecting rod 418 and a sliding protrusion 419. The concave block 411 is fixedly arranged on the top of the base 2. The circular telescopic rod 412 is fixedly arranged on the top of the base 2. The backing plate 413 is fixedly arranged on the top of the free end of the circular telescopic rod 412. The unlocking block 414 is slidingly arranged on the top of the concave block 411. The transmission block 416 is fixedly arranged on the bottom of the unlocking block 414. The bottom of the transmission block 416 is provided with a sliding groove. The sliding protrusion 419 is slidingly arranged on the inner wall of the sliding groove. The transmission block 417 is fixedly arranged on the bottom of the sliding protrusion 419. One end of the connecting rod 418 is fixedly arranged on the bottom of the backing plate 413. The other end of the connecting rod 418 is fixedly arranged on the bottom of the transmission block 417. After the laser welding is completed, the device is automatically contacted and limited, without manual operation, so that the automatic degree and the working efficiency of the device are improved.

[0033] A spring 415 is arranged between the receiving groove and the limiting triangular block 49. The limiting triangular block 49 is in contact with the lock core 410, and the limiting triangular block 49 is reset by the spring 415.

[0034] The working of the embodiment: start the driving device one 41, the driving device one 41 moves and drives the guide rail 42 to move to the direction of mutual approach, the guide rail 42 moves and drives one of the sliding plates 43 to move to the direction of mutual approach, the sliding plate 43 moves and drives the rotating shaft one 44 to move to the direction of the other sliding plate 43, the rotating shaft one 44 moves and drives the welding table 45 to move to the direction of mutual approach, the welding table 45 moves and drives the lock tongue 48 to move to the direction of the other sliding plate 43, the lock tongue 48 moves and drives the limiting triangle 49 to move to the direction of the lock cylinder 410, the limiting triangle 49 moves and contacts the lock cylinder 410, the limiting triangle 49 is blocked by the lock cylinder 410, so that the limiting triangle 49 moves to the inside of the storage groove, with the continuous movement of the lock tongue 48, after the limiting triangle 49 no longer contacts the lock cylinder 410, the limiting triangle 49 is driven to move to the direction away from the storage groove by the first spring 415 reset, the limiting triangle 49 moves and is limited by the lock cylinder 410, so that the limiting triangle 49 can no longer continue to move, so that the two welding tables 45 butt against each other and drive the steel pipes on the top of the welding tables 45 to butt against each other, after the butt joint is completed, self-locking is completed, to prevent gaps between the steel pipes during welding, thereby affecting the welding effect, after the laser welding is completed, the driving device two drives the sliding plate 43 to move to the bottom, the sliding plate 43 moves and drives the lock cylinder 410 to move to the bottom, the lock cylinder 410 moves and contacts the backing plate 413, the lock cylinder 410 moves and drives the backing plate 413 to move to the bottom, the backing plate 413 moves and drives the connecting rod 418 to move to the bottom, the connecting rod 418 moves and drives the transmission block two 417 to move to the bottom, the transmission block two 417 moves and drives the sliding lug 419 to move inside the sliding groove, due to the slope design of the sliding groove, the sliding lug 419 moves and drives the transmission block one 416 to move to the direction of the circular telescopic rod 412, the transmission block one 416 moves and drives the unlocking block 414 to move to the direction of the lock cylinder 410, the unlocking block 414 moves and contacts the limiting triangle 49, the unlocking block 414 moves and drives the limiting triangle 49 to move to the inside of the storage groove, after the limiting triangle 49 moves, it is no longer limited by the lock cylinder 410, so that after the laser welding is completed, the device automatically contacts the limiting, without manual operation, to improve the automatic degree and working efficiency of the device.

[0035] Please refer to Figure 1 - Figure 8On the basis of the above-mentioned embodiment, in another embodiment of the present application, the top of the base 2 is provided with clamping devices for positioning the steel pipe and inner supporting devices for supporting the steel pipe, wherein the clamping devices comprise: a fixed seat 51, a fixed ring 52, a fixed shaft 53, a rotating rod 54, a rotating ring 55 and an elastic telescopic rod 56, the fixed seat 51 is fixedly installed on the top of the welding table 45, the fixed ring 52 is fixedly installed on the top of the fixed seat 51, the fixed shaft 53 is fixedly installed on the side of the fixed ring 52 close to each other, the circumferential surface of the fixed shaft 53 is provided with a limiting groove, the rotating rod 54 is rotatably installed on the circumferential surface of the fixed shaft 53, the rotating ring 55 is rotatably installed on the side of the rotating rod 54 away from the fixed ring 52, the elastic telescopic rod 56 is slidably installed on the top of the fixed seat 51, the inside of the elastic telescopic rod 56 is provided with a third driving device, and the free end of the elastic telescopic rod 56 is rotatably installed on the surface of the rotating ring 55, so that the steel pipe of different diameters can be fixed, the arc-shaped clamping rod 58 is closely attached to the steel pipe to reduce the shaking of the steel pipe during rotation, and the stability of the device during laser welding is improved.

[0036] The clamping device further comprises: an embedded rod 57, an arc-shaped clamping rod 58 and a limiting block 59, the embedded rod 57 is slidably installed in the inside of the rotating rod 54, the arc-shaped clamping rod 58 is rotatably installed on the end of the embedded rod 57 away from the fixed shaft 53, and the limiting block 59 is fixedly installed on the end of the embedded rod 57 away from the arc-shaped clamping rod 58, so that the limiting block 59 can no longer continue to rotate, preventing the rotating rod 54 from being reversed due to gravity or centrifugal force during the rotation of the steel pipe, causing the positioning of the steel pipe to fail, and improving the applicability of the device.

[0037] The embedded rod 57 and the rotating rod 54 are provided with a second spring, the limiting block 59 is in contact with the limiting hole, and the embedded rod 57 is reset by the second spring.

[0038] The inner supporting device comprises a supporting plate 61, a reset telescopic rod 62, a lifting plate 63, a supporting arc rod 64, a square telescopic rod 65, a transmission triangle 66, a transmission long rod 67, and a rubber clamping block 68. The supporting plate 61 is slidingly installed on the top of the welding table 45. The reset telescopic rod 62 is fixedly installed on the top of the supporting plate 61. The lifting plate 63 is fixedly installed on the top of the reset telescopic rod 62. The supporting arc rod 64 is fixedly installed on the top of the lifting plate 63. The square telescopic rod 65 is slidingly installed on the top of the fixed seat 51. The fixed seat 51 is fixedly installed with a reset block 69 on the top. The free end of the reset square telescopic rod 65 is rotatably installed on the circumferential surface of the rotating ring 55. The transmission triangle 66 is fixedly installed on the fixed end of the square telescopic rod 65. The transmission long rod 67 is fixedly installed on the top of the supporting plate 61. The rubber clamping block 68 is fixedly installed on the top of the supporting arc rod 64. After the two ends of the steel pipe are fixed, the end that is close to each other will be inclined to the bottom due to gravity. Long-term use will cause damage to the device. The service life of the device is improved. The friction generated when the rubber clamping block 68 contacts the steel pipe will prevent the steel pipe from reversing due to adhesion caused by the laser beam welding head 3 during laser welding, thereby improving the precision of laser welding.

[0039] The transmission triangle 66 is in contact with the transmission long rod 67. The square telescopic rod 65 is provided with a reset spring in the inside. The free end of the square telescopic rod 65 is driven to reset by the reset spring.

[0040] In the working of this embodiment: the steel pipe is placed in the inner diameter of the fixed ring 52, and then the driving device three is started, the elastic telescopic rod 56 is driven to move, the elastic telescopic rod 56 moves to drive the rotating ring 55 to rotate, the rotating ring 55 rotates to drive the rotating rod 54 to rotate, the rotating rod 54 rotates to drive the embedded rod 57 to rotate, the embedded rod 57 rotates to drive the arc-shaped clamping rod 58 to rotate, the arc-shaped clamping rod 58 rotates to contact the steel pipe, and after the arc-shaped clamping rod 58 contacts the steel pipe, it is adhered to the steel pipe by rotating itself, and it can be fixed according to steel pipes of different diameters, and the arc-shaped clamping rod 58 is closely adhered to the steel pipe to reduce the shaking of the steel pipe during rotation, improve the stability of the device during welding, and the output end of the servo motor 46 rotates to drive the rotating shaft two 47 to rotate, the rotating shaft two 47 rotates to drive the welding table 45 to rotate, the welding table 45 rotates to drive the fixed seat 51 to rotate, the fixed seat 51 rotates to drive the fixed ring 52 to rotate, the fixed ring 52 rotates to drive the fixed shaft 53 to rotate, the fixed shaft 53 rotates to drive the rotating rod 54 to rotate, the rotating rod 54 rotates to drive the embedded rod 57 to rotate, the embedded rod 57 rotates to drive the arc-shaped clamping rod 58 to rotate, and the arc-shaped clamping rod 58 rotates to drive the steel pipe to rotate. After the arc-shaped clamping rod 58 contacts the steel pipe, the arc-shaped clamping rod 58 moves to drive the embedded rod 57 to move away from the steel pipe, the embedded rod 57 moves to drive the limiting block 59 to move towards the fixed shaft 53, and the limiting block 59 moves to contact the limiting groove, so that the limiting block 59 no longer continues to rotate, preventing the rotating rod 54 from reversing due to gravity or centrifugal force when the steel pipe rotates, causing the positioning of the steel pipe to fail, and improving the practicality of the device.

[0041] The rotating ring 55 rotates to drive the square telescopic rod 65 to move towards the elastic telescopic rod 56, the square telescopic rod 65 moves to drive the transmission triangle 66 to move towards the elastic telescopic rod 56, the transmission triangle 66 moves to drive the transmission long rod 67 to move away from the fixed seat 51, the transmission long rod 67 moves to drive the supporting plate 61 to move away from the fixed seat 51, the supporting plate 61 moves to drive the reset telescopic rod 62 to move, the reset telescopic rod 62 moves to drive the lifting plate 63 to move, and after the lifting plate 63 moves, it no longer contacts the reset block 69, so that it is driven by the reset spring to move towards the top, the lifting plate 63 moves to drive the supporting arc rod 64 to move towards the top, the supporting arc rod 64 moves to support the steel pipe, preventing the end that is close to each other from being tilted towards the bottom due to gravity after the two ends of the steel pipe are fixed, preventing long-term use from causing damage to the device, and improving the service life of the device. The supporting arc rod 64 moves to drive the rubber clamping block 68 to move towards the top, the rubber clamping block 68 moves to contact the steel pipe, and since the steel pipe and the rubber clamping block 68 rotate simultaneously to maintain relative stillness, the friction generated when the rubber clamping block 68 contacts the steel pipe prevents the steel pipe from reversing due to adhesion of the laser beam welding head 3 during welding, improving the precision of laser welding.

[0042] While embodiments of the application have been shown and described, it is to be understood that the embodiments described are merely exemplary of the principles and application of the present application. Numerous modifications and adaptions can be effected without departing from the spirit and scope of the present application, which is not limited to the exact construction and arrangement described. It is intended, therefore, to cover all modifications and adaptions that fall within the scope of the claims and their equivalents.

Claims

1. A laser welding apparatus for steel pipes, comprising an operating table, characterized in that: The top of the operation platform is fixedly provided with a base, and the top of the base is provided with a laser beam welding head and a docking device; The docking device comprises a driving device one, two guide rails, two sliding plates, a rotating shaft one, two welding tables, a servo motor, a rotating shaft two, a lock tongue, a limiting triangular block and a lock core; the driving device one is arranged on the top of the base, the two guide rails are fixedly arranged on the top of the base and the driving device one, the two sliding plates are slidingly arranged on the inner walls of the guide rails, the driving device two is arranged in the sliding plates, the rotating shaft one is rotatably arranged on the surface of one of the sliding plates, the servo motor is fixedly arranged on the surface of the other sliding plate, the rotating shaft two is fixedly arranged on the output end of the servo motor, the two welding tables are fixedly arranged on the side of the rotating shaft one and the rotating shaft two, the lock tongue is fixedly arranged on the bottom of one of the welding tables, the surface of the lock tongue is provided with a receiving groove, the limiting triangular block is slidingly arranged on the inner wall of the receiving groove, and the lock core is fixedly arranged on the bottom of the other welding table; The top of the base is provided with a clamping device for positioning the steel pipe and an inner supporting device for supporting the steel pipe; The clamping device comprises a fixed seat, a fixed ring, a fixed shaft, a rotating rod, a rotating ring and an elastic telescopic rod; the fixed seat is fixedly arranged on the top of the welding table, the fixed ring is fixedly arranged on the top of the fixed seat, the fixed shaft is fixedly arranged on the side of the fixed ring, the circumferential surface of the fixed shaft is provided with a limiting groove, the rotating rod is rotatably arranged on the circumferential surface of the fixed shaft, the rotating ring is rotatably arranged on the side of the rotating rod away from the fixed ring, the elastic telescopic rod is slidingly arranged on the top of the fixed seat, the inside of the elastic telescopic rod is provided with a driving device three, and the free end of the elastic telescopic rod is rotatably arranged on the surface of the rotating ring; The clamping device further comprises an embedded rod, an arc-shaped clamping rod and a limiting square block; the embedded rod is slidingly arranged in the rotating rod, the arc-shaped clamping rod is rotatably arranged at the end of the embedded rod away from the fixed shaft, and the limiting square block is fixedly arranged at the end of the embedded rod away from the arc-shaped clamping rod; The inner supporting device comprises a supporting plate, a reset telescopic rod, a lifting plate, a supporting arc rod, a square telescopic rod, a transmission triangular block, a transmission long rod and a rubber clamping block; the supporting plate is slidingly arranged on the top of the welding table, the reset telescopic rod is fixedly arranged on the top of the supporting plate, the lifting plate is fixedly arranged on the top of the reset telescopic rod, the supporting arc rod is fixedly arranged on the top of the lifting plate, the square telescopic rod is slidingly arranged on the top of the fixed seat, the free end of the square telescopic rod is rotatably arranged on the circumferential surface of the rotating ring, the transmission triangular block is fixedly arranged on the fixed end of the square telescopic rod, the transmission long rod is fixedly arranged on the top of the supporting plate, the rubber clamping block is fixedly arranged on the top of the supporting arc rod, and the top of the fixed seat is fixedly provided with a reset block.

2. A laser tube welding apparatus according to claim 1, wherein: The docking device further includes a concave block, a circular telescopic rod, a backing plate, an unlocking block, a transmission block one, a transmission block two, a connecting rod and a sliding convex block, the concave block is fixedly installed on the top of the base, the circular telescopic rod is fixedly installed on the top of the base, the backing plate is fixedly installed on the top of the free end of the circular telescopic rod, the unlocking block is slidingly installed on the top of the concave block, the transmission block one is fixedly installed on the bottom of the unlocking block, the bottom of the transmission block one is provided with a sliding groove, the sliding convex block is slidingly installed on the inner wall of the sliding groove, the transmission block two is fixedly installed on the bottom of the sliding convex block, one end of the connecting rod is fixedly installed on the bottom of the backing plate, and the other end of the connecting rod is fixedly installed on the bottom of the transmission block two.

3. A laser tube welding apparatus according to claim 2, wherein: A spring is arranged between the accommodating groove and the limiting triangle, and the limiting triangle is in contact with the lock core.

4. A laser tube welding apparatus according to claim 1, wherein: A second spring is arranged between the embedded rod and the rotating rod, and the limiting block is in contact with the limiting hole.

5. A laser tube welding apparatus according to claim 1, wherein: The transmission triangle is in contact with the transmission long rod, and the square telescopic rod is internally provided with a return spring.

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