A circular laser welding device suitable for special-shaped stainless steel pipes, oil pipes and bellows

Abstract

The present invention relates to the technical field of laser welding devices, specifically a circular laser welding device suitable for special-shaped stainless steel pipes, oil pipes and bellows, including a clamping mechanism, a discharge mechanism, a side-changing mechanism and a welding mechanism. In the present invention, after the workpiece is clamped in the anti-slip clamp, the camera collects the position data of the mechanical claw and the bellows, the controller starts the first drive motor after analysis, adjusts the height of the lifting block to position the mechanical claw through the threaded rod, the telescopic cylinder drives the mechanical claw to move and clamp the bellows, the second drive motor drives the telescopic cylinder rotation mechanism to adjust it to a horizontal posture, the laser welding robot performs circumferential welding to form an annular weld, and after completion, the lifting block resets to allow the oil pipe to re-enter the anti-slip clamp, the fourth drive motor drives the turntable to rotate to achieve position switching, the third drive motor moves the bearing seat to position via the reciprocating screw, repeats the above steps to complete the welding of the bellows at the other end, the entire welding process is not sealed, and the efficiency is improved by about 65% compared with the traditional process.

Description

Technical Field

[0001] The invention relates to the technical field of laser welding devices, in particular to a ring laser welding device suitable for special-shaped stainless steel pipes, oil pipes and corrugated pipes. Background Art

[0002] Laser welding is a highly efficient and precise welding method that utilizes a high-energy-density laser beam as a heat source. It is a key application of laser material processing technology. In the 1970s, it was primarily used for welding thin-walled materials and low-speed welding. The welding process is heat-conduction-based, meaning that laser radiation heats the workpiece surface, which then diffuses internally through heat conduction. By controlling parameters such as the laser pulse width, energy, peak power, and repetition rate, the workpiece is melted, forming a specific molten pool. Due to its unique advantages, it has been successfully applied to the precision welding of micro and small parts.

[0003] When welding two ends of a workpiece, the traditional process presents a significant efficiency bottleneck: workers must first clamp the workpiece to weld one end, then manually release the workpiece to turn around, and then re-clamp it before welding the other end. This repetitive loading and unloading process not only relies heavily on manual intervention but also leads to extended process interruptions, significantly reducing overall welding efficiency. Summary of the Invention

[0004] The present invention aims to solve one of the technical problems existing in the prior art or related art. The present invention provides a circular laser welding device suitable for special-shaped stainless steel pipes, oil pipes and corrugated pipes to improve welding efficiency.

[0005] To this end, the technical solution adopted in the present invention is:

[0006] A circular laser welding device suitable for special-shaped stainless steel pipes, oil pipes and corrugated pipes, comprising: a clamping mechanism, a discharging mechanism, an edge-changing mechanism and a welding mechanism; the clamping mechanism comprises a clamping base, a lifting and moving mechanism and a clamping assembly, the lifting and moving mechanism is installed in the clamping base, the lifting and moving mechanism is used to realize the up and down height position movement of the feeding assembly, the clamping assembly comprises a second drive motor connected to the lifting and moving mechanism, a telescopic cylinder connected to the output shaft of the second drive motor and a mechanical claw connected to the movable end of the telescopic cylinder; the discharging mechanism comprises a discharging rack attached to the bottom of the clamping base, a horizontal moving mechanism for realizing the position movement and positioning of the clamping mechanism and a discharging base, the discharging An anti-slip clamp is provided in the base; the side-changing mechanism includes a turntable connected between the discharge frame and the discharge base, a flap fitted with the bottom of the turntable, and a fourth drive motor connected between the turntable and the flap; the welding mechanism includes a base frame provided at the bottom of the fourth drive motor, a vertical plate connected to the top of one end of the base frame, a rotating motor connected between the flap and the vertical plate, a laser welding robot provided on the front side of the base frame, a camera installed on one side of the clamping base, and a controller connected to the rear side of the vertical plate. The first drive motor, the second drive motor, the telescopic cylinder, the mechanical claw, the third drive motor, the fourth drive motor, the rotating motor, and the camera are all electrically connected to the controller.

[0007] In a preferred example, the present invention can be further configured as follows: the lifting and moving mechanism includes a threaded rod movably installed inside the clamping base, a first drive motor connected between the clamping base and the threaded rod, and a lifting block slidably installed inside the clamping base and connected to the threaded rod, and the lifting block is used to be installed and cooperated with the second drive motor.

[0008] In a preferred example, the present invention can be further configured as follows: the horizontal moving mechanism includes a reciprocating screw movably installed inside the unloading frame, a third drive motor connected between the unloading frame and the reciprocating screw, and a bearing seat slidably arranged inside the unloading frame and connected to the reciprocating screw, and the upper part of the bearing seat is used to be installed and cooperated with the clamping base.

[0009] In a preferred example, the present invention can be further configured as follows: the discharge base is located in the front of the discharge machine frame, and the discharge base adopts a U-shaped base structure.

[0010] In a preferred example, the present invention can be further configured as follows: the anti-slip clamping member is made of rubber material, the anti-slip clamping member is located on both sides of the U-shaped notch of the discharge base, and the outer edge of the anti-slip clamping member is set with an arc surface.

[0011] In a preferred example, the present invention can be further configured as follows: the flap includes a base platform and a mounting portion, the mounting portion is used to cooperate with the rotating motor, and the base platform is used to cooperate with the turntable.

[0012] In a preferred example, the present invention can be further configured as follows: the fourth drive motor body is fixedly connected to the bottom of the flip plate, and the output shaft of the fourth drive motor movably passes through the top of the flip plate.

[0013] In a preferred example, the present invention can be further configured as follows: a reinforcement plate is sleeved on the outer side of the fourth drive motor, and the top of the reinforcement plate is fixedly connected to the bottom of the flap.

[0014] In a preferred example, the present invention can be further configured as follows: a connecting plate is installed on the base frame, and the connecting plate is arranged in the middle of the base frame.

[0015] In a preferred example, the present invention can be further configured as follows: a material receiving frame is provided on one side of the connecting plate, the material receiving frame is close to the other end of the base frame, and is in contact with the top of the base frame.

[0016] By adopting the above technical solution, the beneficial effects achieved by the present invention are as follows:

[0017] 1. In the present invention, after the workpiece is clamped in the anti-slip clamp, the camera collects the position data of the mechanical claw and the bellows. After analysis, the controller starts the first drive motor, adjusts the height of the lifting block by the threaded rod to position the mechanical claw, and the telescopic cylinder drives the mechanical claw to translate and clamp the bellows. The second drive motor drives the telescopic cylinder rotation mechanism to adjust it to a horizontal posture. The laser welding robot performs circumferential welding to form an annular weld. After completion, the lifting block is reset to allow the oil pipe to re-enter the anti-slip clamp. The fourth drive motor drives the turntable to rotate to achieve switching of the welding position. The third drive motor moves the bearing seat to position via the reciprocating screw. Repeat the above steps to complete the welding of the bellows at the other end. The entire welding process is seamless, and the efficiency is improved by about 65% compared with the traditional process.

[0018] 2. In the present invention, when the annular joint of the oil pipe tends to be placed horizontally, the rotary motor drives the flap to flip 180°, causing the welded end of the oil pipe to rotate. Then, the laser welding robot performs 360° circumferential welding on the joints of the two corrugated pipes, forming a continuous and uniform annular weld. The welding method is simple and the welding effect is guaranteed.

[0019] 3. In the present invention, after the welding of the special-shaped stainless steel oil pipe and the bellows is completed, the controller controls the rotation direction of the output shaft of the second drive motor, so that the mechanical claw indirectly connected to the second drive motor flips the formed workpiece toward the receiving frame. After the formed workpiece reaches the top of the receiving frame, the controller will drive the mechanical claw to open, thereby completing automatic material removal and improving the ease of use of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a three-dimensional diagram of the overall structure of the present invention;

[0021] Figure 2 Schematic diagram of the clamping mechanism of the present invention;

[0022] Figure 3 Schematic diagram of the discharge mechanism of the present invention;

[0023] Figure 4 Schematic diagram of the side-changing mechanism of the present invention;

[0024] Figure 5 This is a schematic diagram of the welding mechanism of the present invention;

[0025] Figure 6 This is a schematic diagram of the installation position of the connecting plate and the material receiving frame of the present invention.

[0026] Reference numerals:

[0027] 100, clamping mechanism; 110, clamping base; 120, threaded rod; 130, first drive motor; 140, lifting block; 150, second drive motor; 160, telescopic cylinder; 170, mechanical claw;

[0028] 200, discharge mechanism; 210, discharge frame; 220, reciprocating screw; 230, third drive motor; 240, bearing seat; 250, discharge base; 260, anti-slip clamp;

[0029] 300, side-changing mechanism; 310, turntable; 320, flap; 321, base platform; 322, mounting portion; 330, fourth drive motor;

[0030] 400, welding mechanism; 410, chassis; 420, vertical plate; 430, rotating motor; 440, laser welding robot; 450, camera; 460, controller;

[0031] 500, reinforcement plate;

[0032] 600, connecting plate;

[0033] 700. Material receiving frame. DETAILED DESCRIPTION

[0034] To make the purpose, technical solutions and advantages of the present invention more clear, the present invention is further described in detail below in conjunction with specific embodiments and with reference to the accompanying drawings. It should be noted that the embodiments of the present invention and the features therein can be combined with each other without conflict.

[0035] It is to be understood that these descriptions are illustrative only and are not intended to limit the scope of the invention.

[0036] The following describes, in conjunction with the accompanying drawings, a circular laser welding device for special-shaped stainless steel pipes, oil pipes, and corrugated pipes provided by some embodiments of the present invention.

[0037] Combine Figures 1-6 As shown, the present invention provides a circular laser welding device suitable for special-shaped stainless steel pipes, oil pipes and corrugated pipes, including a clamping mechanism 100, a discharge mechanism 200, a side-changing mechanism 300 and a welding mechanism 400.

[0038] In the specific structure, the clamping mechanism 100 includes a clamping base 110, a lifting and moving mechanism and a clamping assembly. The lifting and moving mechanism is installed in the clamping base 110. The lifting and moving mechanism is used to realize the upper and lower height position movement of the feeding assembly. The clamping assembly includes a second drive motor 150 connected to the lifting and moving mechanism, a telescopic cylinder 160 connected to the output shaft of the second drive motor 150 and a mechanical claw 170 connected to the movable end of the telescopic cylinder 160.

[0039] Among them, the lifting and moving mechanism includes a threaded rod 120 movably installed inside the clamping base 110, a first drive motor 130 connected between the clamping base 110 and the threaded rod 120, and a lifting block 140 slidably installed inside the clamping base 110 and connected to the threaded rod 120. The lifting block 140 is used to be installed and cooperated with the second drive motor 150; wherein, the first drive motor 130 rotates to drive the threaded rod 120 to rotate, and after the threaded rod 120 rotates, it drives the lifting block 140 to move up and down, and combines with the second drive motor 150 to realize the steering control of the mechanical claw 170, and the telescopic cylinder 160 realizes the telescopic control of the mechanical claw 170.

[0040] In the specific structure, the discharge mechanism 200 includes a discharge frame 210 attached to the bottom of the clamping base 110, a horizontal moving mechanism and a discharge base 250 for realizing the position movement and positioning of the clamping mechanism 100, and an anti-slip clamp 260 is provided in the discharge base 250; the side changing mechanism 300 includes a turntable 310 connected between the discharge frame 210 and the discharge base 250, a flap 320 attached to the bottom of the turntable 310, and a fourth drive motor 330 connected between the turntable 310 and the flap 320; the discharge mechanism 200 is optimized, and a discharge frame 210 is set. Combined with the horizontal moving mechanism, the horizontal drive of the clamping mechanism 100 can be realized, and the lifting and moving mechanism and the telescopic cylinder 160 can be combined to enable the mechanical claw 170 to realize three-axis motion, and combined with the second drive motor 150, it can also realize steering motion, thereby improving the movable trajectory of the mechanical claw 170 and facilitating the grasping and processing of special-shaped pipe fittings.

[0041] Among them, the horizontal moving mechanism includes a reciprocating screw rod 220 movably installed inside the unloading frame 210, a third driving motor 230 connected between the unloading frame 210 and the reciprocating screw rod 220, and a bearing seat 240 slidably arranged inside the unloading frame 210 and connected to the reciprocating screw rod 220. The upper part of the bearing seat 240 is used to be installed and cooperated with the clamping base 110; wherein, the third driving motor 230 is used to drive the reciprocating screw rod 220 to rotate, thereby driving the bearing seat 240 to move, so that the clamping base 110 located on the upper part of the bearing seat 240 is easy to move.

[0042] Among them, the discharge base 250 is located in the front of the discharge machine frame 210, and the discharge base 250 adopts a U-shaped base structure; the anti-slip clamping piece 260 is made of rubber material, and the anti-slip clamping piece 260 is located on both sides of the U-shaped groove of the discharge base 250, and the outer edge of the anti-slip clamping piece 260 is set with an arc surface; a spacing is formed between the two anti-slip clamping pieces 260, and the outer edge of the anti-slip clamping piece 260 is set with an arc surface. The spacing is set to facilitate the insertion of the special-shaped stainless steel oil pipe between the two anti-slip clamping pieces 260, and then the arc surface design further facilitates the insertion of the special-shaped stainless steel oil pipe.

[0043] By adopting the above technical solution, after the workpiece is clamped in the anti-slip clamp, the camera collects the position data of the mechanical claw and the bellows. After analysis, the controller starts the first drive motor, adjusts the height of the lifting block by the threaded rod to position the mechanical claw, and the telescopic cylinder drives the mechanical claw to move horizontally to clamp the bellows. The second drive motor drives the telescopic cylinder rotation mechanism to adjust it to a horizontal posture. The laser welding robot performs circumferential welding to form a circular weld. After completion, the lifting block is reset to allow the oil pipe to re-enter the anti-slip clamp. The fourth drive motor drives the turntable to rotate to achieve switching of the welding position. The third drive motor moves the bearing seat to position via the reciprocating screw. Repeat the above steps to complete the welding of the bellows at the other end. The entire welding process is about 65% more efficient than the traditional process.

[0044] Among them, the side-changing mechanism 300 includes a turntable 310 connected between the unloading frame 210 and the unloading base 250, a flap 320 fitted with the bottom of the turntable 310, and a fourth drive motor 330 connected between the turntable 310 and the flap 320; the body of the fourth drive motor 330 is fixedly connected to the bottom of the flap 320, and the output shaft of the fourth drive motor 330 movably passes through the top of the flap 320. The connection method of the fourth drive motor 330 avoids it from rotating with the turntable 310, so that the side-changing operation can be carried out smoothly.

[0045] In combination with the above, the welding mechanism 400 includes a base frame 410 provided at the bottom of the fourth drive motor 330, a vertical plate 420 connected to the top of one end of the base frame 410, a rotating motor 430 connected between the flip plate 320 and the vertical plate 420, a laser welding robot 440 provided on the front side of the base frame 410, a camera 450 installed on one side of the clamping base 110, a controller 460 connected to the rear side of the vertical plate 420, a first drive motor 130, a second drive motor 150, a telescopic gas The cylinder 160, the mechanical claw 170, the third drive motor 230, the fourth drive motor 330, the rotating motor 430, and the camera 450 are all electrically connected to the controller 460, among which the first drive motor 130, the second drive motor 150, the telescopic cylinder 160, the mechanical claw 170, the third drive motor 230, the fourth drive motor 330, the rotating motor 430, and the camera 450 are all electrically connected to the controller 460, which is a commonly used circuit connection structure in the prior art. Its specific circuit connection structure does not constitute an invention or innovation, so it will not be repeated here.

[0046] Furthermore, the flap 320 includes a base platform 321 and a mounting portion 322, wherein the mounting portion 322 is used to cooperate with the rotating motor 430, and the base platform 321 is used to cooperate with the turntable 310; optimizing the structure of the mounting portion 322 can ensure the connection area between it and the output end of the rotating motor 430, improve its installation firmness, and then the materials used in its production ensure that it can firmly support its top structure; optimizing the base platform 321 so that it is convenient for it to cooperate with the turntable 310, and usually a bearing seat structure is provided inside to facilitate the rotation of the turntable 310 relative to the base platform 321.

[0047] Furthermore, a reinforcement plate 500 is sleeved on the outer side of the fourth driving motor 330 , and the top of the reinforcement plate 500 is fixedly connected to the bottom of the flap 320 . The reinforcement plate 500 can enhance the installation firmness of the fourth driving motor 330 .

[0048] In combination with the above, a connecting plate 600 is installed on the base frame 410, and the connecting plate 600 is arranged in the middle of the base frame 410. The provision of the connecting plate 600 can increase the structural strength of the base frame 410 and, to a certain extent, improve the overall structural stability of the device.

[0049] Furthermore, a material receiving frame 700 is provided on one side of the connecting plate 600. The material receiving frame 700 is close to the other end of the base frame 410 and is fitted with the top of the base frame 410. However, after the welding of the special-shaped stainless steel oil pipe and the bellows is completed, the controller 460 controls the rotation direction of the output shaft of the second drive motor 150, so that the mechanical claw 170 indirectly connected to the second drive motor 150 flips the formed workpiece toward the material receiving frame 700. After the formed workpiece reaches the top of the material receiving frame 700, the controller 460 will drive the mechanical claw 170 to open, thereby completing the automatic material removal and improving the ease of use of the device.

[0050] The working principle and use process of the present invention:

[0051] Step 1: Pre-positioning and fixing

[0052] a. Workers first pre-treat the bellows at both ends of the special-shaped stainless steel oil pipe by spot welding to ensure the initial fixation of the bellows and the oil pipe;

[0053] b. The pre-fixed component is placed vertically between the two anti-slip clamps 260, and the initial positioning is achieved by elastic clamping;

[0054] Step 2: Intelligent positioning of the mechanical claw 170

[0055] c. The camera 450 collects the relative position data of the mechanical claw 170 and the bellows in real time, and performs image analysis through the controller 460;

[0056] d. The controller 460 starts the first drive motor 130 to drive the threaded rod 120, accurately adjusting the height of the lifting block 140 so that the mechanical claw 170 aligns with the bellows to be clamped;

[0057] e. The telescopic cylinder 160 extends to drive the mechanical claw 170 to translate and clamp, completing the stable grasping of the bellows;

[0058] Step 3: Posture adjustment and head welding

[0059] f. The second drive motor 150 drives the telescopic cylinder 160 to rotate the mechanism to adjust the bellows to a horizontal welding posture;

[0060] g. The laser welding robot 440 performs circumferential continuous welding on the positioned bellows to form a preliminary annular weld;

[0061] h. After welding is completed, the controller 460 controls the lifting block 140 to descend and reset, so that the oil pipe is re-embedded in the clamping position of the anti-slip clamp 260;

[0062] Step 4: Side positioning and secondary welding

[0063] i. The fourth drive motor 330 drives the turntable 310 to rotate 180 degrees, so that the unwelded end of the tubing on the discharge base 250 is turned to the welding station;

[0064] j. The third drive motor 230 drives the bearing seat 240 to translate through the reciprocating screw 220, driving the clamping base 110 to feed and position the entire body;

[0065] k. Repeat steps cg to complete the clamping, positioning and welding of the second bellows;

[0066] Step 5: Three-dimensional weld formation

[0067] l. The rotating motor 430 drives the flap 320 to rotate 180 degrees, so that the annular joint of the oil pipe is at the optimal welding angle;

[0068] m. The laser welding robot 440 performs 360° circumferential welding on the joints of the two bellows to form a continuous and uniform annular weld.

[0069] Through automated control of multi-axis linkage, this process achieves closed-loop control of the visual positioning system and actuators, automatic reversing welding at two workstations, three-dimensional spatial posture adjustment, and unmanned welding operations throughout the entire process. All actuators (first drive motor 130, second drive motor 150, third drive motor 230, and fourth drive motor 330) are precisely coordinated and controlled through the controller 460 to ensure seamless connection between each process, improving efficiency by approximately 65% ​​compared to traditional processes.

[0070] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and alterations may be made to the embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the claims and their equivalents.

Claims

1. A circular laser welding device suitable for special-shaped stainless steel pipes, oil pipes and bellows, characterized in that: include: A material clamping mechanism (100), a material unloading mechanism (200), a side-changing mechanism (300), and a welding mechanism (400); The clamping mechanism (100) includes a clamping base (110), a lifting and moving mechanism, and a clamping assembly. The lifting and moving mechanism is installed in the clamping base (110). The lifting and moving mechanism is used to realize the vertical height position movement of the clamping assembly. The clamping assembly includes a second drive motor (150) connected to the lifting and moving mechanism, a telescopic cylinder (160) connected to the output shaft of the second drive motor (150), and a mechanical claw (170) connected to the movable end of the telescopic cylinder (160). The unloading mechanism (200) includes a unloading frame (210) attached to the bottom of the clamping base (110), a mechanical claw (170) for realizing the unloading of the clamping assembly. The material discharging mechanism (100) comprises a horizontal moving mechanism and a material discharging base (250) for moving and positioning the material discharging mechanism (100), wherein an anti-slip clamping member (260) is provided in the material discharging base (250); the side-changing mechanism (300) comprises a turntable (310) connected between the material discharging frame (210) and the material discharging base (250), a flap (320) affixed to the bottom of the turntable (310), and a fourth drive motor (330) connected between the turntable (310) and the flap (320); the welding mechanism (400) comprises a base frame (410) provided at the bottom of the fourth drive motor (330), a base frame (410) affixed to the base frame (410), and a fourth drive motor (330) connected between the turntable (310) and the flap (320). ), a vertical plate (420) connected to the top of one end thereof, a rotating motor (430) connected between the flip plate (320) and the vertical plate (420), a laser welding robot (440) provided on the front side of the base frame (410), a camera (450) installed on one side of the clamping base (110), a controller (460) connected to the rear side of the vertical plate (420), a first drive motor (130), a second drive motor (150), a telescopic cylinder (160), a mechanical claw (170), a third drive motor (230), a fourth drive motor (330), a rotating motor (430), and a camera (450) all of which are The workpiece is electrically connected to the controller (460); after the workpiece is clamped in the anti-slip clamp, the camera collects the position data of the mechanical claw and the bellows, and the controller starts the first drive motor after analysis, and adjusts the height of the lifting block to position the mechanical claw through the threaded rod. The telescopic cylinder drives the mechanical claw to move horizontally to clamp the bellows, and the second drive motor drives the telescopic cylinder to rotate and adjust it to a horizontal posture. The laser welding robot performs circumferential welding to form an annular weld. After completion, the lifting block is reset to allow the oil pipe to re-enter the anti-slip clamp. The fourth drive motor drives the turntable to rotate to achieve position switching. The third drive motor moves the bearing seat to position through the reciprocating screw. Repeat the above steps to complete the welding of the bellows at the other end.

2. The annular laser welding device for special-shaped stainless steel pipes, oil pipes and bellows according to claim 1 is characterized in that: The lifting and moving mechanism includes a threaded rod (120) movably installed inside the clamping base (110), a first drive motor (130) connected between the clamping base (110) and the threaded rod (120), and a lifting block (140) slidably installed inside the clamping base (110) and connected to the threaded rod (120), wherein the lifting block (140) is used to be installed and cooperated with the second drive motor (150).

3. The annular laser welding device for special-shaped stainless steel pipes, oil pipes and bellows according to claim 2 is characterized in that: The horizontal movement mechanism includes a reciprocating screw (220) movably mounted inside the unloading frame (210), a third driving motor (230) connected between the unloading frame (210) and the reciprocating screw (220), and a bearing seat (240) slidably arranged inside the unloading frame (210) and connected to the reciprocating screw (220), wherein the upper portion of the bearing seat (240) is used for mounting and cooperating with the clamping base (110).

4. The annular laser welding device for special-shaped stainless steel pipes, oil pipes and corrugated pipes according to claim 3 is characterized in that: The discharge base (250) is located in the front of the discharge frame (210), and the discharge base (250) adopts a U-shaped base structure.

5. The annular laser welding device for special-shaped stainless steel pipes, oil pipes and bellows according to claim 4 is characterized in that: The anti-slip clamping piece (260) is made of rubber material. The anti-slip clamping piece (260) is located on both sides of the U-shaped notch of the discharge base (250). The outer edge of the anti-slip clamping piece (260) is set with an arc surface.

6. The annular laser welding device for special-shaped stainless steel pipes, oil pipes and bellows according to claim 1 is characterized in that: The body of the fourth drive motor (330) is fixedly connected to the bottom of the flip plate (320), and the output shaft of the fourth drive motor (330) movably passes through the top of the flip plate (320).

7. The annular laser welding device for special-shaped stainless steel pipes, oil pipes and bellows according to claim 6 is characterized in that: The flap (320) comprises a base platform (321) and a mounting portion (322), wherein the mounting portion (322) is used to cooperate with the rotating motor (430), and the base platform (321) is used to cooperate with the turntable (310).

8. The annular laser welding device for special-shaped stainless steel pipes, oil pipes and bellows according to claim 6 is characterized in that: A reinforcement plate (500) is sleeved on the outside of the fourth drive motor (330), and the top of the reinforcement plate (500) is fixedly connected to the bottom of the flap (320).

9. The annular laser welding device for special-shaped stainless steel pipes, oil pipes and corrugated pipes according to claim 1 is characterized in that: A connecting plate (600) is installed on the base frame (410), and the connecting plate (600) is arranged in the middle of the base frame (410).

10. The annular laser welding device for special-shaped stainless steel pipes, oil pipes and corrugated pipes according to claim 9, characterized in that: A material receiving frame (700) is provided on one side of the connecting plate (600), and the material receiving frame (700) is close to the other end of the bottom frame (410) and is in contact with the top of the bottom frame (410).

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