Assembly girth welding machine

Abstract

The invention discloses an assembly girth welding machine which comprises a platform frame, a roller bracket, a rotary clamp assembly, a translation driving assembly and a welding gun assembly used for executing welding operation. And the roller bracket is mounted at the middle section position of the platform frame and is used for stably clamping the barrel and enabling the barrel to rotate smoothly. The rotary clamp assemblies are installed on the platform frame in a sliding mode, are of two symmetrically-arranged structures, are located on the two sides of the roller bracket correspondingly and are used for clamping the end covers from the two ends. The translation driving assembly is connected with the rotating clamp assembly and can drive the rotating clamp assembly to reciprocate left and right along the platform frame so as to achieve accurate alignment of the end cover and the barrel. The welding gun assembly is fixed to the top of the rotating clamp assembly, full-process automation of automatic alignment, assembly and welding of the end cover and the barrel is achieved, the welding precision and the production efficiency are remarkably improved, and the automatic welding machine is particularly suitable for manufacturing of barrel-shaped structures such as pressure containers and chemical tank bodies.

Description

Technical Field

[0001] This invention relates to the field of welding equipment technology, and in particular to a circumferential welder. Background Technology

[0002] Cylindrical containers are widely used in water heaters, chemical reactors, pressure vessels, and other fields due to their structural stability and high space utilization. These containers typically consist of two parts: a cylindrical body and end caps. The cylindrical body is the main body of the container, while the end caps are used to seal the two ends of the cylindrical body. During manufacturing, the end caps are usually welded to the two ends of the cylindrical body to achieve the container's sealing and structural integrity. The welding process places high demands on the technology and equipment, as the welding quality directly affects the safety and service life of the container. Therefore, to ensure welding precision and efficiency, it is necessary to design and manufacture specialized equipment for accurately aligning and fixing the end caps to the cylindrical body before welding, thus facilitating subsequent welding work. Summary of the Invention

[0003] This invention aims to at least solve one of the technical problems existing in the prior art. To this end, embodiments of this invention propose an assembly and circumferential welding machine, mainly used for assembly and circumferential welding between a cylinder and an end cap. It includes: a base frame as an integral support structure; a roller bracket for supporting and rotating the cylinder; a rotating clamp assembly for clamping the end cap and driving its rotation; a translation drive assembly for controlling the horizontal movement of the rotating clamp; and a welding torch assembly for performing the welding operation. The roller bracket is installed in the middle of the base frame to stably clamp the cylinder and allow it to rotate smoothly. The rotating clamp assembly is slidably installed on the base frame, employing two symmetrically arranged structures located on both sides of the roller bracket, for clamping the end cap from both ends. The translation drive assembly is connected to the rotating clamp assembly and can drive it to move back and forth along the base frame to achieve precise alignment of the end cap and the cylinder. The welding torch assembly is fixed to the top of the rotating clamp assembly and is used to perform circumferential welding after assembly.

[0004] According to some embodiments of the present invention, the roller bracket mainly includes two clamping arms arranged in an inverted V-shape, with the cylinder body clamped between the two clamping arms. A roller is rotatably mounted on the upper end of each clamping arm, and the roller contacts the outer wall of the cylinder body, providing stable support and ensuring smooth and unobstructed rotation of the cylinder body.

[0005] According to some embodiments of the present invention, the roller bracket is further equipped with a lifting frame and a sliding plate; a slide rail is fixed on the sliding plate, and a mounting seat is slidably mounted on the slide rail. The mounting seat is rotatably connected to the lower end of the clamping arm, and the sliding plate itself can be slidably mounted on the top of the lifting frame.

[0006] According to some embodiments of the present invention, the lifting frame is located in the middle section of the platform frame, and a lifting drive component is installed at its bottom. By driving the lifting frame to move up and down, the height of the cylinder can be adjusted so that its port is accurately aligned with the end cover.

[0007] According to some embodiments of the present invention, in order to improve the stability of the mounting base when it moves, the mounting base is slidably mounted on a slide rail, and the slide rail is fixed to a translation plate.

[0008] According to some embodiments of the present invention, the rotary clamp assembly includes a bowl-shaped cover, a base box, a rotary shaft, and a rotary drive; the bowl-shaped cover houses an end cap, and the base box is located behind the bowl-shaped cover.

[0009] According to some embodiments of the present invention, a welding torch assembly is mounted on the top of the bottom box; the circumferential seam formed by the combination of the end cap and the cylinder is located at the edge of the cup-shaped cover opening, so the welding torch assembly is arranged toward this position.

[0010] According to some embodiments of the present invention, the rotating shaft is connected to the rotating drive and passes forward through the bottom box to connect with the bowl-shaped cover; the rotating drive drives the bowl-shaped cover to rotate through the rotating shaft, thereby driving the entire pre-assembled container to rotate.

[0011] According to some embodiments of the present invention, fixed bearings are installed on the front and rear side plates of the bottom box to support the rotating shaft and ensure its smooth rotation.

[0012] According to some embodiments of the present invention, the rotary clamp assembly further includes a support frame located between the bowl-shaped cover and the base box, the base box and the support frame being slidably mounted together on the platform frame. A first cylinder is mounted on the base box, the drive rod of which is connected to the support frame for pushing the support frame to move back and forth, thereby achieving docking of the end cap with the cylinder port.

[0013] According to some embodiments of the present invention, in order to ensure that the bowl-shaped cover can still rotate during movement, a sliding bearing sleeve is installed on the upright frame. The sliding bearing sleeve is fitted onto the rotating shaft and connected to the bowl-shaped cover, so that the upright frame can slide along the front section of the rotating shaft, and at the same time, it can drive the bowl-shaped cover to rotate together when the rotating shaft rotates.

[0014] According to some embodiments of the present invention, a tailstock is provided at the rear of the bottom box. The tailstock is slidably mounted on the platform frame, and a second cylinder is fixed thereon. The drive rod of the second cylinder is connected to the bottom box and is used to push the bottom box a second time, thereby further enhancing the clamping force between the end cap and the cylinder and ensuring a firm assembly.

[0015] According to some embodiments of the present invention, in order to adjust the overall position of the rotary clamp assembly, a nut is installed on the tailstock, the nut is threaded onto the screw, and the tail end of the screw is supported in a bearing seat fixed on the base frame; by rotating the screw, the nut can be moved along the screw, thereby driving the entire rotary clamp assembly to adjust its position.

[0016] According to some embodiments of the present invention, the two sets of rotating clamp assemblies can move in opposite directions or in reverse by adjusting their respective screws to accommodate cylinders of different lengths.

[0017] According to some embodiments of the present invention, the welding torch assembly includes a frame, an arc welding torch, a laser welding torch, and a seam pressing wheel. Two frames are provided, each equipped with a lifting and moving assembly, on which an arm is mounted, and the height of the arm is adjusted by lifting.

[0018] According to some embodiments of the present invention, an arc welding gun is mounted on one arm and a laser welding gun is mounted on the other arm, which are used together for welding tasks.

[0019] According to some embodiments of the present invention, a wheel frame structure is provided on the arm on which the laser welding gun is mounted. A seam pressing wheel is rotatably mounted at the bottom of the wheel frame, and the laser welding gun is fixedly mounted on one side of the wheel frame, so that the seam pressing wheel is located in the middle position between the arc welding gun and the laser welding gun.

[0020] According to some embodiments of the present invention, the welding torch assembly further includes a movable plate, a base plate, a front-to-back movable component, and a translational drive component, wherein a first frame is slidably mounted on the movable plate, and the movable plate and a second frame are slidably mounted on the base plate.

[0021] According to some embodiments of the present invention, the first frame is connected to the front and rear moving assembly to realize the front and rear movement of the moving plate; the front and rear moving assembly adopts a lead screw and nut and a lead screw, wherein the lead screw and nut are connected to the moving plate, and by rotating the lead screw, the lead screw and nut move relative to the lead screw, thereby driving the moving plate to move.

[0022] According to some embodiments of the present invention, the second frame is connected to the movable plate via a connecting plate, and the movable plate is connected to a translation drive component, which may be a telescopic cylinder, thereby enabling the overall structure to move left and right.

[0023] According to some embodiments of the present invention, an arc welding gun is mounted on the first frame and a laser welding gun is mounted on the second frame. During the position adjustment process, the position of the arc welding gun is adjusted by the forward and backward moving component so that it is aligned with the cylinder area near the joint. At the same time, the two frames are moved laterally synchronously by the translation drive component to ensure that the arc welding gun and the laser welding gun are precisely aligned directly above the joint, thereby effectively avoiding the occurrence of quality problems such as incomplete welding.

[0024] The present invention has at least the following beneficial effects: 1. During the processing, the cylinder to be welded is first placed stably on the roller support and securely fixed by its clamping mechanism to ensure that the cylinder does not shift position during subsequent operations. Then, two sets of rotating clamping assemblies clamp the end caps from both ends. Each set of clamps is controlled by an independent translation drive assembly, enabling high-precision synchronous movement in opposite directions. Under the coordinated push of the translation drive assemblies, the end caps smoothly and synchronously move towards both ends of the cylinder until they completely cover the cylinder ports, forming a structurally complete pre-assembled container. During this process, the circumferential seam between the end caps and the cylinder is accurately aligned with the welding position of the welding gun assembly, providing a good foundation for subsequent welding processes.

[0025] After assembly, the two sets of rotating fixture assemblies begin to rotate synchronously, driving the pre-assembled container to rotate uniformly around its axis. Simultaneously, the welding torch assembly activates, continuously and uniformly welding the circumferential seam as the container rotates. When the container completes one full rotation, the welding torch synchronously completes the welding of the entire circumferential seam, forming a complete and sealed weld. This design achieves fully automated alignment, assembly, and welding of the end cap and cylinder, significantly improving welding accuracy and production efficiency, and is particularly suitable for the manufacture of cylindrical structures such as pressure vessels and chemical tanks.

[0026] 2. By moving the translation plate left and right, the clamping position can be adjusted to ensure that the clamping arms always act on the center of the cylinder, ensuring stable clamping and preventing the cylinder from shifting during processing. In addition, the two mounting seats are threaded onto a two-way lead screw. Rotating the lead screw can move the two mounting seats towards or away from each other, thereby adjusting the distance between the two clamping arms to accommodate cylinders of different diameters.

[0027] 3. A tailstock is provided at the rear of the bottom box. The tailstock is slidably installed on the platform frame, and a second cylinder is fixed on it. The drive rod of the second cylinder is connected to the bottom box and is used to push the bottom box a second time to further enhance the clamping force between the end cover and the cylinder body and ensure a firm assembly.

[0028] 4. The arc welding gun heats the area around the joint, forming a wide annular molten pool on the surface of the cylinder near the joint. At the same time, the laser welding head is positioned directly opposite the weld, generating a deep annular molten pool at the joint. The wide annular molten pool and the deep annular molten pool intersect and merge in space, thereby achieving a complete weld between the cylinder and the end cap and effectively improving the overall welding quality and bonding strength.

[0029] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0030] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which: Figure 1 This is an overall schematic diagram of an embodiment of the present invention; Figure 2 This is a schematic diagram of a roller bracket according to an embodiment of the present invention; Figure 3 This is a schematic diagram of a rotary clamp assembly according to an embodiment of the present invention. Figure 1 ; Figure 4 This is a schematic diagram of a rotary clamp assembly according to an embodiment of the present invention. Figure 2 ; Figure 5 This is a schematic diagram of a rotary clamp assembly according to an embodiment of the present invention. Figure 3 ; Figure 6 This is a front view schematic diagram of the rotary clamp assembly according to an embodiment of the present invention; Figure 7 for Figure 6 Schematic diagram of the AA section; Figure 8 This is a schematic diagram of the welding torch assembly according to an embodiment of the present invention. Figure 1 ; Figure 9 This is a schematic diagram of the welding torch assembly according to an embodiment of the present invention. Figure 2 ; Figure 10 This is a schematic diagram of the welding torch assembly according to an embodiment of the present invention. Figure 3 . Detailed Implementation

[0031] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0032] Reference Figure 1As shown, the assembly and circumferential welding machine is mainly used for assembling and welding circumferential seams between a cylinder and an end cap. It includes: a base frame 100 as an overall support structure; a roller bracket 200 for supporting and rotating the cylinder; a rotating clamp assembly 300 for clamping the end cap and driving its rotation; a translation drive assembly 400 for controlling the horizontal movement of the rotating clamp; and a welding torch assembly 500 for performing the welding operation. The roller bracket 200 is installed in the middle of the base frame 100 to stably clamp the cylinder and allow it to rotate smoothly. The rotating clamp assembly 300 is slidably mounted on the base frame 100, employing two symmetrically arranged structures located on both sides of the roller bracket 200, for clamping the end cap from both ends. The translation drive assembly 400 is connected to the rotating clamp assembly 300 and can drive it to move back and forth along the base frame 100 to achieve precise alignment between the end cap and the cylinder. The welding torch assembly 500 is fixed to the top of the rotating clamp assembly 300 for performing circumferential welding after assembly.

[0033] During the processing, the cylinder to be welded is first placed stably on the roller support 200 and firmly fixed by its clamping mechanism to ensure that the cylinder does not shift position during subsequent operations. Then, two sets of rotating clamp assemblies 300 clamp the end caps from both ends. Each clamp is controlled by an independent translation drive assembly 400, enabling high-precision synchronous movement in opposite directions. Under the coordinated push of the translation drive assembly 400, the end caps smoothly and synchronously move towards both ends of the cylinder until they completely cover the cylinder ports, forming a structurally complete pre-assembled container. During this process, the circumferential seam between the end caps and the cylinder is accurately aligned with the welding position of the welding gun assembly 500, providing a good foundation for subsequent welding processes.

[0034] After assembly, the two sets of rotating clamp assemblies 300 begin to rotate synchronously, driving the pre-assembled container to rotate uniformly around its axis. Simultaneously, the welding torch assembly 500 starts, continuously and uniformly welding the circumferential seam as the container rotates. When the container has completed one full rotation, the welding torch synchronously completes the welding of the entire circumferential seam, forming a complete and sealed weld. This design achieves full automation of the end cap and cylinder alignment, assembly, and welding process, significantly improving welding accuracy and production efficiency, and is particularly suitable for the manufacture of cylindrical structures such as pressure vessels and chemical tanks.

[0035] Reference Figure 2 As shown, the roller bracket 200 mainly includes two clamping arms 210 arranged in an inverted V-shape, with the cylinder being clamped between the two clamping arms 210. Each clamping arm 210 has a roller 220 rotatably mounted on its upper end. The roller 220 contacts the outer wall of the cylinder, providing stable support and ensuring smooth rotation of the cylinder.

[0036] To accommodate cylinders of different specifications, the roller bracket 200 is also equipped with a lifting frame 230 and a sliding plate 240; a slide rail 260 is fixed on the sliding plate 240, and a mounting seat 270 is slidably installed on the slide rail 260. The mounting seat 270 is rotatably connected to the lower end of the clamping arm 210, while the sliding plate 240 itself can be slidably installed on the top of the lifting frame 230.

[0037] The lifting frame 230 is located in the middle of the base frame 100, and a lifting drive component 250 is installed at its bottom. By driving the lifting frame 230 to move up and down, the height of the cylinder can be adjusted to ensure accurate alignment between its port and the end cap. By moving the translation plate 240 left and right, the clamping position can be adjusted so that the clamping arm 210 always acts on the middle of the cylinder, ensuring stable clamping and preventing the cylinder from shifting during processing. In addition, two mounting seats 270 are threaded onto a two-way lead screw 280. Rotating the lead screw allows the two mounting seats 270 to move towards or away from each other, thereby adjusting the distance between the two clamping arms 210 to accommodate cylinders of different diameters.

[0038] To improve the stability of the mounting base 270 when it moves, the mounting base 270 is slidably mounted on the slide rail 260, which is fixed to the translation plate 240.

[0039] Reference Figures 3 to 5 The rotating clamp assembly 300 includes a bowl-shaped cover 310, a base box 320, a rotating shaft 330, and a rotating drive 340; the bowl-shaped cover 310 houses the end cap, and the base box 320 is located behind the bowl-shaped cover 310.

[0040] The welding torch assembly 500 is mounted on the top of the bottom box 320; the circumferential seam formed by the combination of the end cap and the cylinder is located at the edge of the cup-shaped cover 310, so the welding torch assembly 500 is arranged toward this position.

[0041] The rotating shaft 330 is connected to the rotating drive 340 and passes forward through the bottom box 320 to connect with the bowl-shaped cover 310; the rotating drive 340 drives the bowl-shaped cover 310 to rotate through the rotating shaft 330, thereby driving the entire pre-assembled container to rotate.

[0042] In this embodiment, the rotary drive component 340 is a combination of a motor and a reducer. The reducer is connected to the rotary shaft 330 via a coupling. Synchronous pulleys are respectively installed on the drive shafts of the motor and the reducer. The two synchronous pulleys are connected by a synchronous belt to achieve power transmission.

[0043] Reference Figure 6 , 7 As shown, fixed bearings 370 are installed on the front and rear side plates of the base box 320 to support the rotating shaft 330 and ensure its smooth rotation.

[0044] Reference Figures 3 to 7As shown, the rotating clamp assembly 300 also includes a support frame 350 located between the bowl-shaped cover 310 and the base box 320. The base box 320 and the support frame 350 are slidably mounted on the platform frame 100. A first cylinder 360 is mounted on the base box 320, and its drive rod is connected to the support frame 350 to push the support frame 350 to move back and forth, thereby realizing the docking of the end cover with the cylinder port.

[0045] To ensure that the cup-shaped cover 310 can still rotate during movement, a sliding bearing sleeve 380 is installed on the upright frame 350. The sliding bearing sleeve 380 is fitted onto the rotating shaft 330 and connected to the cup-shaped cover 310, so that the upright frame 350 can slide along the front section of the rotating shaft 330, and at the same time, it can drive the cup-shaped cover 310 to rotate together when the rotating shaft 330 rotates.

[0046] Reference Figure 7 As shown, a tailstock 390 is provided at the rear of the base box 320. The tailstock 390 is slidably installed on the platform frame 100, and a second cylinder 3100 is fixed on it. The drive rod of the second cylinder 3100 is connected to the base box 320 and is used to push the base box 320 a second time, further enhancing the clamping force between the end cover and the cylinder body, and ensuring a firm assembly.

[0047] To adjust the overall position of the rotary clamp assembly 300, a nut 391 is installed on the tailstock 390. The nut 391 is threaded onto the screw 392, and the tail end of the screw 392 is supported in a bearing seat 393 fixed on the base frame 100. By rotating the screw 392, the nut 391 can be moved along the screw 392, thereby driving the entire rotary clamp assembly 300 to adjust its position.

[0048] The two sets of rotating clamp assemblies 300 can move in opposite directions or in reverse by adjusting their corresponding screws 392 to accommodate cylinders of different lengths.

[0049] Reference Figures 8 to 10 As shown, the welding torch assembly 500 includes a frame 510, an arc welding torch 520, a laser welding torch 530, and a seam pressing wheel 540. Two frames 510 are provided, each equipped with a lifting and moving assembly 550, on which an arm 560 is mounted, allowing the height of the arm 560 to be adjusted by lifting.

[0050] Specifically, an arc welding gun 520 is mounted on one arm 560, and a laser welding gun 530 is mounted on the other arm 560, both used for welding tasks.

[0051] The lifting and moving assembly 550 mainly consists of a drive motor, a lead screw, and a lead screw nut 391. The lead screw is fixedly installed on the frame 510 in the vertical direction. The top of the lead screw and the output shaft end of the drive motor are each equipped with a synchronous pulley. The two synchronous pulleys are connected by a synchronous belt ring. The lead screw nut 391 is threaded onto the outside of the lead screw and is connected to the arm 560. The drive motor drives the lead screw to rotate, causing the lead screw nut 391 to move up and down along the axis of the lead screw, thereby pulling the arm 560 to achieve smooth lifting and moving.

[0052] The 520 arc welding gun heats the area around the joint, forming a wide, annular molten pool on the surface of the cylinder near the joint. At the same time, the laser welding head is positioned directly opposite the weld, generating a deep, annular molten pool at the joint. The wide and deep annular molten pools intersect and merge in space, thereby achieving a complete weld between the cylinder and the end cap and effectively improving the overall welding quality and bonding strength.

[0053] Reference Figure 9 As shown, a wheel frame 570 structure is provided on the arm 560 on which the laser welding gun 530 is installed. A seam pressing wheel 540 is rotatably mounted at the bottom of the wheel frame 570. The laser welding gun 530 is fixedly installed on one side of the wheel frame 570, so that the seam pressing wheel 540 is in the middle position between the arc welding gun 520 and the laser welding gun 530.

[0054] During the welding process, the pressure roller 540 moves along the weld seam trajectory and applies a certain downward pressure, which not only ensures that the weld seam surface is flat and smooth, but also effectively prevents the weld seam from bulging, thereby improving the appearance quality and structural consistency.

[0055] Reference Figures 8 to 10 As shown, the welding torch assembly 500 also includes a movable plate 580, a base plate 590, a front-to-back moving assembly 5100, and a translational drive component 5200. The first frame 510 is slidably mounted on the movable plate 580, while the movable plate 580 and the second frame 510 are slidably mounted on the base plate 590.

[0056] The first frame 510 is connected to the front and rear moving assembly 5100 to realize the front and rear movement of the moving plate 580. The front and rear moving assembly 5100 adopts a lead screw and nut and a lead screw, wherein the lead screw and nut are connected to the moving plate. By rotating the lead screw, the lead screw and nut move relative to the lead screw, thereby driving the moving plate 580 to move.

[0057] The second frame 510 is connected to the movable plate 580 via the connecting plate 5300. The movable plate 580 is connected to the translation drive 5200, which can be a telescopic cylinder, so that the overall structure can move left and right.

[0058] The first frame 510 is equipped with an arc welding gun 520, and the second frame 510 is equipped with a laser welding gun 530. During the position adjustment process, the position of the arc welding gun 520 is adjusted by the forward and backward moving component 5100 so that it is aligned with the cylinder area near the joint. At the same time, the translation drive component 5200 makes the two frames 510 move laterally in sync to ensure that the arc welding gun 520 and the laser welding gun 530 are precisely aligned above the joint, thereby effectively avoiding quality problems such as incomplete welding.

[0059] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present invention.

Claims

1. A circumferential welder, characterized in that, include: Platform frame (100); A roller bracket (200) is provided at the middle section of the platform frame (100). The roller bracket (200) is used to hold and place the cylinder, and the cylinder rotates on the roller bracket (200). A rotating clamp assembly (300) is slidably mounted on the base frame (100). The rotating clamp assembly (300) is used to clamp and fix the end cap. Two sets of rotating clamp assemblies (300) are used. The roller bracket (200) is located between the two sets of rotating clamp assemblies (300) and the two sets of rotating clamp assemblies (300) are arranged opposite to each other. A translation drive assembly (400) is connected to the rotary clamp assembly (300), and the translation drive assembly (400) is used to drive the rotary clamp assembly (300) to move back and forth left and right; A welding torch assembly (500) is fixed to the top of the rotating clamp assembly (300) and is used for welding.

2. The assembly circumferential welder according to claim 1, characterized in that, The roller bracket (200) includes clamping arms (210), and two clamping arms (210) are used. When the two clamping arms (210) are unfolded, they form an inverted V-shape, and the cylinder is clamped between the two clamping arms (210). A roller (220) is rotatably mounted on the upper end of the clamping arm (210), and the roller (220) contacts the outer wall of the cylinder.

3. The assembly circumferential welder according to claim 2, characterized in that, The roller bracket (200) also includes a lifting frame (230) and a sliding plate (240). The lifting frame (230) is located at the middle section of the platform frame (100), and a lifting drive component (250) is installed at the bottom of the lifting frame (230). The translation plate (240) is slidably mounted on the top of the lifting frame (230), and a mounting base (270) is slidably mounted on the translation plate (240). The mounting base (270) is rotatably connected to the lower end of the clamping arm (210). The two mounting seats (270) are threaded onto the bidirectional lead screw (280). Rotating the bidirectional lead screw (280) causes the two mounting seats (270) to move toward or in opposite directions.

4. The assembly circumferential welder according to claim 3, characterized in that, The mounting base (270) is slidably mounted on the slide rail (260), and the slide rail (260) is fixed on the translation plate (240).

5. The assembly circumferential welder according to claim 1, characterized in that, The rotating clamp assembly (300) includes a bowl-shaped cover (310), a base box (320), a rotating shaft (330), and a rotating drive (340). An end cap is installed inside the bowl-shaped cover (310). The base box (320) is located behind the bowl-shaped cover (310), and the welding torch assembly (500) is installed on the top of the base box (320). The welding torch assembly (500) faces the edge of the bowl-shaped cover (310). The rotating shaft (330) is connected to the rotating drive (340), and the rotating shaft (330) passes forward through the bottom box (320) and then connects to the bowl-shaped cover (310).

6. The assembly circumferential welder according to claim 5, characterized in that, The rotating clamp assembly (300) also includes a stand (350) located between the bowl-shaped cover (310) and the base box (320). The base box (320) and the stand (350) are slidably mounted on the platform frame (100). A first cylinder (360) is mounted on the base box (320). The drive rod of the first cylinder (360) is connected to the stand (350). The first cylinder (360) is used to push and pull the stand (350). Fixed bearings (370) are installed on the front and rear side plates of the base box (320), and the fixed bearings (370) are mounted on the rotating shaft (330); The support frame (350) is equipped with a sliding bearing sleeve (380), which is mounted on the rotating shaft (330) and connected to the cup-shaped cover (310).

7. The assembly circumferential welder according to claim 6, characterized in that, The base box (320) is provided with a tail seat (390) at the rear. The tail seat (390) is slidably mounted on the platform frame (100). A second cylinder (3100) is fixed on the tail seat (390). The drive rod of the second cylinder (3100) is connected to the base box (320). The second cylinder (3100) is used to push and pull the base box (320). The tailstock (390) is fitted with a nut (391), which is threaded onto the screw (392). The tail section of the screw (392) is fitted onto a bearing seat (393), which is fixed to the base frame (100).

8. The assembly circumferential welder according to claim 1, characterized in that, The welding torch assembly (500) includes a frame (510), an arc welding torch (520), a laser welding torch (530), and a seam pressing wheel (540). Two frames (510) are used, and each frame (510) is equipped with a lifting and moving assembly (550). An arm (560) is installed on the lifting and moving assembly (550). The arc welding torch (520) is installed on one arm (560), and the laser welding torch (530) is installed on the other arm (560).

9. The assembly circumferential welder according to claim 8, characterized in that, A wheel frame (570) is mounted on the arm (560) on which the laser welding gun (530) is mounted. The bottom end of the wheel frame (570) is rotatably mounted with the seam pressing wheel (540). The laser welding gun (530) is fixed to the side of the wheel frame (570), so that the seam pressing wheel (540) is located between the arc welding gun (520) and the laser welding gun (530).

10. The assembly circumferential welder according to claim 8, characterized in that, The welding torch assembly (500) further includes a movable plate (580), a base plate (590), a front and rear moving assembly (5100), and a translation drive (5200). The first frame (510) is slidably mounted on the movable plate (580), and the movable plate (580) and the second frame (510) are slidably mounted on the base plate (590). The first frame (510) is connected to the front-to-back moving assembly (5100) to allow the moving plate (580) to move back and forth; The second frame (510) is connected to the movable plate (580) via a connecting plate (5300), and the movable plate (580) is connected to the translation drive (5200) to move the movable plate (580) left and right.

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