Automatic welding device for welding thin-wall steel pipe

Abstract

The invention discloses an automatic welding device for welding thin-wall steel pipes, and belongs to the technical field of steel pipe welding processing, the automatic welding device comprises two thin-wall steel pipe bodies and further comprises a supporting base, concentric adjusting structures are arranged at the two ends of the supporting base respectively, and a concentric limiting structure is arranged on each concentric adjusting structure; the concentric limiting structure is in sliding fit with the concentric adjusting structure; a concentric detection structure is arranged on the supporting base and faces the welding position of the two thin-wall steel pipe bodies, and an automatic welding structure for welding the two thin-wall steel pipe bodies is arranged in the middle of the supporting base. The two thin-wall steel pipes can be adjusted to be in a concentric state, and after the two thin-wall steel pipes are concentrically adjusted, stress distribution is uniform when welding seams bear external force; after the welding is finished, the stress at the welding seam can be uniformly dispersed in the whole welding area no matter whether the welding seam bears axial tension, pressure or bending force.

Description

Technical Field

[0001] The invention belongs to the technical field of steel pipe welding processing, and in particular relates to an automatic welding device for welding thin-walled steel pipes. Background Art

[0002] Thin-walled steel pipes are widely used in many industries, such as automobile exhaust systems and fuel lines in the automotive industry; metal furniture frames in the furniture industry; and scaffolding and decorative metal structures in the construction industry. These industries have high requirements for the welding quality and efficiency of thin-walled steel pipes. For example, in the automotive exhaust system, the welding quality of thin-walled steel pipes directly affects the sealing and service life of the exhaust system, and due to the large scale of automobile production, efficient welding methods are required to meet production requirements.

[0003] However, when welding, the existing welding device does not adjust the two thin-walled steel pipes to be welded. When concentric adjustment is not performed, the stress situation at the weld becomes complicated. After welding is completed, due to the non-concentricity of the steel pipes, the stress distribution on the weld is uneven when subjected to external force; this uneven stress distribution may cause the weld to crack when the pressure is lower than the design pressure, greatly reducing the strength of the weld. Summary of the invention

[0004] The embodiment of the present invention provides an automatic welding device for welding thin-walled steel pipes to solve the problems in the prior art.

[0005] The embodiment of the present invention adopts the following technical scheme: an automatic welding device for welding thin-walled steel pipes, comprising two thin-walled steel pipe bodies and a support base, wherein concentric adjustment structures are respectively provided at both ends of the support base, and the concentric adjustment structures are slidably matched with the support base, and each of the concentric adjustment structures is provided with a concentric limiting structure, and the concentric limiting structure is slidably matched with the concentric adjustment structure; a concentric detection structure is provided on the support base, and the concentric detection structure is arranged toward the welding point of the two thin-walled steel pipe bodies, and an automatic welding structure for welding the two thin-walled steel pipe bodies is provided at the middle position of the support base.

[0006] A further technical solution is that each of the concentric adjustment structures includes an adjustment motor, an adjustment ball screw, an adjustment cylinder, an adjustment frame and two sliding rods, the adjustment motor is located on a support base, the adjustment ball screw is connected to the main shaft of the adjustment motor, the two sliding rods are symmetrically arranged at the bottom of the adjustment frame, the sliding rods are slidingly fitted with the support base, the adjustment frame is threadedly connected to the adjustment ball screw, and a circular placement groove is provided on the adjustment frame.

[0007] According to a further technical solution, the concentric limiting structure includes a limiting oil cylinder and a limiting arc seat, wherein the limiting oil cylinder is vertically arranged at the top position of the adjustment frame, the limiting arc seat is connected to the telescopic end of the limiting oil cylinder, and a plurality of anti-slip protrusions are arranged in the limiting arc seat.

[0008] A further technical solution is that the concentric detection structure includes a mounting seat, a mounting ring is provided on the mounting seat, a gear ring is provided inside the mounting ring, the gear ring and the mounting ring are rotatably connected, a driving motor is provided on the top of the mounting ring, a driving gear meshing with the gear ring is provided on the main shaft of the driving motor, and a concentric detection sensor is provided on the gear ring.

[0009] According to a further technical solution, the automatic welding structure comprises a fixed support, the fixed support is located at the center of the two thin-walled steel pipe bodies, and automatic welding guns are provided at the top and bottom of the fixed support.

[0010] A further technical solution is that each end of the thin-walled steel pipe body is provided with a welding rotating structure, and the welding rotating structure includes a rotating cylinder, a rotating disk and four oil clamps. The rotating disk is connected to the rotating end of the rotating cylinder, and the four oil clamps are distributed on the rotating disk at equal intervals. The four oil clamps clamp the thin-walled steel pipe body.

[0011] According to a further technical solution, the welding rotating structure is also provided with a horizontal moving structure for driving the welding rotating structure to move.

[0012] According to a further technical solution, a controller is provided on the side of the support base.

[0013] At least one of the above technical solutions adopted in the embodiments of the present invention can achieve the following beneficial effects:

[0014] First, when the present invention performs concentric adjustment on two thin-walled steel pipe bodies, the adjustment motor drives the adjustment ball screw to rotate, thereby driving the position of the adjustment cylinder to extend the adjustment ball screw to move up and down. The up and down movement of the adjustment cylinder will drive the adjustment frame to move up and down on the support base through two sliding rods, thereby driving the position of the thin-walled steel pipe body to move up and down. The adjustment makes the two thin-walled steel pipe bodies in a concentric position. When the two thin-walled steel pipes are concentrically adjusted, the stress distribution of the weld is uniform when subjected to external force; after the welding is completed, whether it is subjected to axial tension, pressure or bending force, the stress at the weld can be evenly dispersed throughout the welding area. For example, in a pressure pipeline system, the concentrically welded thin-walled steel pipe weld can effectively withstand the internal fluid pressure and avoid weld cracking due to stress concentration, thereby significantly improving the strength of the weld and ensuring the safety of the pipeline system.

[0015] Secondly, after the positions of the two thin-walled steel pipe bodies are respectively driven to be concentric by the two concentric adjustment structures, the limiting cylinder works to drive the arc seat to move downward, so that a number of anti-slip protrusions inside the arc seat move downward to limit the position of the thin-walled steel pipe body, so that the thin-walled steel pipe body is located in the circular placement groove. When the two thin-walled steel pipe bodies are initially fixed and adjusted up and down to be concentric, the thin-walled steel pipe bodies need to be fixed to prevent the positions of the two thin-walled steel pipe bodies from shifting and the concentricity from deviating, which affects the accuracy of welding. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0017] Figure 1 It is a front view of the present invention;

[0018] Figure 2 It is a schematic diagram of a partial three-dimensional structure of the present invention;

[0019] Figure 3 It is a first three-dimensional structural schematic diagram of the concentric adjustment structure and the concentric limiting structure in the present invention;

[0020] Figure 4 It is a second three-dimensional structural schematic diagram of the concentric adjustment structure and the concentric limiting structure in the present invention;

[0021] Figure 5 It is a schematic diagram of the three-dimensional structure of the concentric detection structure in the present invention;

[0022] Figure 6 It is a three-dimensional structural schematic diagram of the automatic welding structure in the present invention;

[0023] Figure 7 It is a schematic diagram of the three-dimensional structure of the welding rotating structure in the present invention;

[0024] Reference numerals:

[0025] Support base 1, concentric adjustment structure 2, adjustment motor 21, adjustment ball screw 22, adjustment cylinder 23, adjustment frame 24, sliding rod 25, circular placement groove 26, concentric limiting structure 3, limiting oil cylinder 31, limiting arc seat 32, anti-slip protrusion 33, concentric detection structure 4, mounting seat 41, mounting ring 42, gear ring 43, drive motor 44, drive gear 45, concentric detection sensor 46, automatic welding structure 5, fixed support 51, automatic welding gun 52, thin-walled steel pipe body 6, welding rotation structure 7, rotating cylinder 71, rotating disk 72, oil clamp 73, horizontal moving structure 8, controller 9. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the specific embodiments of the present invention and the corresponding drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0027] The following describes in detail a technical solution of an automatic welding device for welding thin-walled steel pipes according to various embodiments of the present invention in conjunction with the accompanying drawings.

[0028] Reference Figures 1 to 7 As shown, an embodiment of the present invention provides an automatic welding device for welding thin-walled steel pipes, comprising two thin-walled steel pipe bodies 6, and also comprising a support base 1, wherein concentric adjustment structures 2 are respectively provided at both ends of the support base 1, and the concentric adjustment structures 2 are slidably matched with the support base 1, and each of the concentric adjustment structures 2 is provided with a concentric limiting structure 3, and the concentric limiting structure 3 is slidably matched with the concentric adjustment structure 2; a concentric detection structure 4 is provided on the support base 1, and the concentric detection structure 4 is arranged toward the welding position of the two thin-walled steel pipe bodies 6, and an automatic welding structure 5 for welding the two thin-walled steel pipe bodies 6 is provided at the middle position of the support base 1.

[0029] In this embodiment, each of the concentric adjustment structures 2 includes an adjustment motor 21, an adjustment ball screw 22, an adjustment cylinder 23, an adjustment frame 24 and two sliding rods 25. The adjustment motor 21 is located on the support base 1, and the adjustment ball screw 22 is connected to the main shaft of the adjustment motor 21. The two sliding rods 25 are symmetrically arranged at the bottom of the adjustment frame 24. The sliding rods 25 are slidably matched with the support base 1. The adjustment frame 24 is threadedly connected to the adjustment ball screw 22, and a circular placement groove 26 is provided on the adjustment frame 24.

[0030] When the two thin-walled steel pipe bodies 6 are adjusted concentrically, the adjustment motor 21 works to drive the adjustment ball screw 22 to rotate, thereby driving the position of the adjustment cylinder 23 to extend the adjustment ball screw 22 to move up and down. The up and down movement of the adjustment cylinder 23 will drive the adjustment frame 24 to move up and down on the support base 1 through the two sliding rods 25, thereby driving the position of the thin-walled steel pipe body 6 to move up and down. The two thin-walled steel pipe bodies 6 are adjusted so that they are in a concentric position. When the two thin-walled steel pipes are adjusted concentrically, the stress distribution of the weld is uniform when subjected to external force. After welding is completed, whether it is subjected to axial tension, pressure or bending force, the stress at the weld can be evenly dispersed throughout the welding area. For example, in a pressure piping system, the concentrically welded thin-walled steel pipe weld can effectively withstand the internal fluid pressure and avoid weld cracking due to stress concentration, thereby significantly improving the strength of the weld and ensuring the safety of the pipeline system;

[0031] Reduce welding defects: Concentric adjustment makes the molten pool more stable during welding; during welding, the shielding gas can evenly cover the molten pool to prevent the molten pool from contacting with harmful gases in the air. For example, when using gas shielded welding, the steel pipe in the concentric state can ensure that the shielding gas forms a stable protective layer around the molten pool, effectively reducing the generation of pores. At the same time, the stable molten pool can also make the molten droplet transition more uniform, avoid defects such as slag inclusion and unfused, and improve the quality of the weld;

[0032] Improve fluid delivery effect: For thin-walled steel pipes used to transport fluids, concentric welding can ensure the consistency of the inner diameter of the pipe, so that when the fluid flows in the pipe, the flow rate is uniform, and there will be no local flow rate that is too fast or too slow. For example, in the pipeline systems of the chemical and petroleum industries, concentrically welded thin-walled steel pipes can reduce the pressure loss of the fluid, improve the fluid delivery efficiency, and effectively avoid cavitation caused by changes in the inner diameter of the pipe, thereby extending the service life of the pipe;

[0033] Reduce pipeline vibration and noise: When concentrically welded thin-walled steel pipes are transporting fluids or are subjected to external vibrations, the vibration amplitude of the pipes will be greatly reduced due to uniform force. For example, in the pipes of the HVAC system, concentrically welded thin-walled steel pipes can reduce the vibration and noise caused by the operation of the fan, providing a quieter and more comfortable use environment, while also reducing fatigue damage to the pipes caused by vibration.

[0034] In this embodiment, the concentric limiting structure 3 includes a limiting cylinder 31 and a limiting arc seat 32. The limiting cylinder 31 is vertically arranged at the top position of the adjustment frame 24. The limiting arc seat 32 is connected to the telescopic end of the limiting cylinder 31. A plurality of anti-slip protrusions 33 are arranged in the limiting arc seat 32.

[0035] After the two thin-walled steel tube bodies 6 are respectively driven to be concentric by the two concentric adjustment structures 2, the limiting cylinder 31 works to drive the arc seat to move downward, so that the several anti-slip protrusions 33 inside the arc seat move downward to limit the position of the thin-walled steel tube body 6, so that the thin-walled steel tube body 6 is located in the circular placement groove 26. When the two thin-walled steel tube bodies 6 are initially fixed and adjusted up and down to be concentric, the thin-walled steel tube body 6 needs to be fixed to prevent the position of the two thin-walled steel tube bodies 6 from shifting and the concentricity from deviating, which affects the accuracy of welding.

[0036] In this embodiment, the concentric detection structure 4 includes a mounting seat 41, a mounting ring 42 is provided on the mounting seat 41, a gear ring 43 is provided inside the mounting ring 42, the gear ring 43 is rotatably connected to the mounting ring 42, a driving motor 44 is provided on the top of the mounting ring 42, a driving gear 45 meshing with the gear ring 43 is provided on the main shaft of the driving motor 44, and a concentric detection sensor 46 is provided on the gear ring 43.

[0037] When the two thin-walled steel pipe bodies 6 are concentrically detected, the driving motor 44 drives the driving gear 45 to rotate so that the location gear ring 43 rotates in the mounting ring 42. The rotation of the gear ring 43 drives the concentric detection sensor 46 to rotate, and the welding place of the two thin-walled steel pipe bodies 6 is detected to detect whether the two thin-walled steel pipe bodies 6 are in a concentric position. Then, the two thin-walled steel pipe bodies 6 are adjusted up and down respectively through the two concentric adjustment structures 2, so that the two thin-walled steel pipe bodies 6 are in a concentric position for welding;

[0038] The concentricity detection sensor 46 uses optical imaging technology. It emits light such as laser to illuminate the circumference of the object to be measured, and then uses an optical receiving device such as a CCD camera to receive the reflected light. By imaging and analyzing the reflected light, the position information of each point on the circumference of the object is calculated. If it is to detect whether two objects are concentric, the position difference of corresponding points on the circumference of the two objects can be compared to obtain the concentricity deviation.

[0039] In this embodiment, the automatic welding structure 5 includes a fixed support 51 , which is located at the center of the two thin-walled steel pipe bodies 6 , and automatic welding guns 52 are provided at the top and bottom of the fixed support 51 .

[0040] When welding two thin-walled steel pipe bodies 6, after the two thin-walled steel pipe bodies 6 are concentrically detected so that the two thin-walled steel pipe bodies 6 are in a concentric position, two automatic welding guns 52 work to perform preliminary welding work on the top and bottom positions of the two thin-walled steel pipe bodies 6, and then the thin-walled steel pipe bodies 6 can be driven to rotate through the welding rotating structure 7, so as to perform comprehensive welding work on the thin-walled steel pipe bodies 6.

[0041] In this embodiment, each end of the thin-walled steel pipe body 6 is provided with a welding rotating structure 7, and the welding rotating structure 7 includes a rotating cylinder 71, a rotating disk 72 and four oil clamps 73. The rotating disk 72 is connected to the rotating end of the rotating cylinder 71, and the four oil clamps 73 are distributed on the rotating disk 72 at equal intervals. The four oil clamps 73 clamp the thin-walled steel pipe body 6; the welding rotating structure 7 is also provided with a horizontal moving structure 8 that drives it to move.

[0042] When welding the two thin-walled steel pipe bodies 6, rotation is required. At this time, the two welding rotating structures 7 rotate synchronously, and the four oil clamps 73 clamp and fix the ends of the thin-walled steel pipe body 6 respectively. The rotating cylinder 71 drives the rotating disk 72 to rotate, thereby driving the two concentric thin-walled steel pipe bodies 6 to rotate, so as to perform comprehensive welding work on the two thin-walled steel pipe bodies 6. During the initial loading of the two thin-walled steel pipe bodies 6, the two welding rotating structures 7 can be driven to move to both sides by the horizontal moving structure 8 to load the thin-walled steel pipe body 6.

[0043] It should be noted that the horizontal moving structure 8 belongs to the existing technology, and the welding rotating structure 7 can be driven horizontally by a cylinder or an electric slide, so as to move the welding rotating structure 7 to the end position of the thin-walled steel pipe body 6.

[0044] In this embodiment, a controller 9 is provided on the side of the support base 1; when the controller 9 is in use, the concentric adjustment structure 2, the concentric limiting structure 3, the concentric detection structure 4, the automatic welding structure 5, the welding rotation structure 7 and the horizontal moving structure 8 can be used to accurately weld the two thin-walled steel pipe bodies 6.

[0045] The above description is only an embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent substitution, improvement, etc. made within the spirit and principle of the present invention should be included in the scope of the claims of the present invention.

Claims

1. An automatic welding device for welding thin-walled steel pipes, comprising two thin-walled steel pipe bodies (6), characterized in that: It also comprises a support base (1), wherein two ends of the support base (1) are respectively provided with a concentric adjustment structure (2), and the concentric adjustment structure (2) and the support base (1) are slidably matched; Each of the concentric adjustment structures (2) is provided with a concentric limiting structure (3), and the concentric limiting structure (3) is slidably matched with the concentric adjustment structure (2); The support base (1) is provided with a concentric detection structure (4), and the concentric detection structure (4) is arranged toward the welding point of the two thin-walled steel pipe bodies (6); An automatic welding structure (5) for welding two thin-walled steel pipe bodies (6) is provided at the middle position of the support base (1).

2. The automatic welding device for welding thin-walled steel pipes according to claim 1, characterized in that: Each of the concentric adjustment structures (2) comprises an adjustment motor (21), an adjustment ball screw (22), an adjustment cylinder (23), an adjustment frame (24) and two sliding rods (25). The adjusting motor (21) is located on the supporting base (1), and the adjusting ball screw (22) is connected to the main shaft of the adjusting motor (21). The two sliding rods (25) are symmetrically arranged at the bottom of the adjustment frame (24), and the sliding rods (25) are slidably matched with the support base (1). The adjusting frame (24) is threadedly connected to the adjusting ball screw (22), and a circular placement groove (26) is provided on the adjusting frame (24).

3. The automatic welding device for welding thin-walled steel pipes according to claim 2, characterized in that: The concentric limiting structure (3) comprises a limiting oil cylinder (31) and a limiting arc seat (32), wherein the limiting oil cylinder (31) is vertically arranged at the top position of the adjustment frame (24). The limiting arc seat (32) is connected to the telescopic end of the limiting oil cylinder (31), and a plurality of anti-slip convex points (33) are arranged in the limiting arc seat (32).

4. The automatic welding device for welding thin-walled steel pipes according to claim 1, characterized in that: The concentric detection structure (4) comprises a mounting seat (41), and a mounting ring (42) is provided on the mounting seat (41). A gear ring (43) is disposed inside the mounting ring (42), and the gear ring (43) is rotatably connected to the mounting ring (42). A driving motor (44) is disposed on the top of the mounting ring (42), and a driving gear (45) meshing with the gear ring (43) is disposed on the main shaft of the driving motor (44). The gear ring (43) is provided with a concentric detection sensor (46).

5. The automatic welding device for welding thin-walled steel pipes according to claim 1, characterized in that: The automatic welding structure (5) comprises a fixed support (51), the fixed support (51) is located at the center of two thin-walled steel pipe bodies (6), and automatic welding guns (52) are provided at the top and bottom of the fixed support (51).

6. The automatic welding device for welding thin-walled steel pipes according to claim 1, characterized in that: Each end of the thin-walled steel pipe body (6) is provided with a welding rotating structure (7). The welding rotating structure (7) comprises a rotating cylinder (71), a rotating disk (72) and four oil clamps (73). The rotating disk (72) is connected to the rotating end of the rotating cylinder (71), and four oil clamps (73) are distributed on the rotating disk (72) at equal intervals. The four oil clamps (73) clamp the thin-walled steel pipe body (6).

7. The automatic welding device for welding thin-walled steel pipes according to claim 6, characterized in that: The welding rotating structure (7) is also provided with a horizontal moving structure (8) for driving it to move.

8. The automatic welding device for welding thin-walled steel pipes according to claim 1, characterized in that: A controller (9) is provided on the side of the support base (1).

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