An automatic welding device for welding thin-walled steel pipes

Abstract

The application discloses an automatic welding device for welding thin-wall steel pipes and belongs to the technical field of steel pipe welding processing, which comprises two thin-wall steel pipe bodies, a supporting base, concentric adjusting structures arranged at the two ends of the supporting base, concentric limiting structures arranged on each of the concentric adjusting structures and in sliding fit with the concentric adjusting structures, a concentric detecting structure arranged on the supporting base and facing the welding positions of the two thin-wall steel pipe bodies, and an automatic welding structure arranged at the middle position of the supporting base and used for welding the two thin-wall steel pipe bodies. The automatic welding device can adjust the two thin-wall steel pipes to be in a concentric state, and when the two thin-wall steel pipes are adjusted to be concentric, the stress of the weld is uniformly distributed when the weld bears external force. After welding is completed, the stress at the weld can be uniformly dispersed in the whole welding area no matter whether the weld bears axial tension, pressure or bending force.

Description

Technical Field

[0001] This invention belongs to the field of steel pipe welding and processing technology, and particularly relates to an automatic welding device for welding thin-walled steel pipes. Background Technology

[0002] Thin-walled steel pipes have a wide range of applications in many industries, such as the automotive industry for exhaust systems and fuel lines; the furniture industry for metal furniture frames; and the construction industry for scaffolding and decorative metal structures. These industries have high requirements for the welding quality and efficiency of thin-walled steel pipes. For example, in automotive exhaust systems, the welding quality of thin-walled steel pipes directly affects the system's sealing performance and lifespan. Furthermore, due to the large scale of automotive production, efficient welding methods are needed to meet production demands.

[0003] However, existing welding equipment does not adjust the two thin-walled steel pipes during welding. Without concentric adjustment, the stress situation at the weld becomes complicated. After welding, due to the misalignment of the steel pipes, the stress distribution of the weld is uneven when subjected to external forces. This uneven stress distribution may cause the weld to crack under pressure below the design pressure, greatly reducing the strength of the weld. Summary of the Invention

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

[0005] The present invention adopts the following technical solution: an automatic welding device for welding thin-walled steel pipes, comprising two thin-walled steel pipe bodies and a support base. Each end of the support base is provided with a concentric adjustment structure, which slides in conjunction with the support base. Each concentric adjustment structure is provided with a concentric limiting structure, which slides in conjunction with the concentric adjustment structure. The support base is provided with a concentric detection structure, which is positioned towards the welding point of the two thin-walled steel pipe bodies. An automatic welding structure for welding the two thin-walled steel pipe bodies is located at the middle position of the support base.

[0006] A further technical solution is provided, in which 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 the 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 slidably engaged with the support base, the adjustment frame is threadedly connected to the adjustment ball screw, and the adjustment frame is provided with a circular placement groove.

[0007] A further technical solution is that the concentric limiting structure includes a limiting cylinder and a limiting arc seat. The limiting cylinder is vertically installed at the top of the adjusting frame. The limiting arc seat is connected to the telescopic end of the limiting cylinder. The limiting arc seat is provided with several anti-slip protrusions.

[0008] A further technical solution includes a mounting base, a mounting ring on the mounting base, a toothed ring inside the mounting ring, the toothed ring being rotatably connected to the mounting ring, a drive motor on the top of the mounting ring, a drive gear meshing with the toothed ring on the main shaft of the drive motor, and a concentric detection sensor on the toothed ring.

[0009] In a further technical solution, the automatic welding structure includes a fixed support located at the center of two thin-walled steel pipe bodies, and an automatic welding gun is provided at both the top and bottom of the fixed support.

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

[0011] In a further technical solution, the welding rotating structure is also provided with a horizontal moving structure that drives it to move.

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

[0013] The above-described at least one technical solution adopted in the embodiments of the present invention can achieve the following beneficial effects:

[0014] Firstly, in this invention, when two thin-walled steel pipe bodies are concentrically adjusted, the adjusting motor drives the adjusting ball screw to rotate, thereby causing the adjusting cylinder to extend and the adjusting ball screw to move up and down. This up-and-down movement of the adjusting cylinder causes the adjusting frame to move up and down on the support base via two sliding rods, thus moving the thin-walled steel pipe bodies up and down. This adjustment brings the two thin-walled steel pipe bodies into 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 forces. After welding, whether subjected to axial tensile force, compressive force, or bending force, the stress at the weld can be evenly distributed throughout the entire welding area. For example, in a pressure pipeline system, the concentrically welded thin-walled steel pipe weld can effectively withstand the internal fluid pressure, avoiding weld cracking due to stress concentration, thereby significantly improving the weld strength and ensuring the safety of the pipeline system.

[0015] Secondly, in this invention, after the two thin-walled steel pipe bodies are aligned by adjusting their positions using two concentric adjustment structures, the limiting cylinder moves the arc-shaped seat downwards. This causes several anti-slip protrusions inside the arc-shaped seat to move downwards, limiting the position of the thin-walled steel pipe body. This ensures that the thin-walled steel pipe body is located within the circular placement groove. During the initial fixing and concentric adjustment of the two thin-walled steel pipe bodies, it is necessary to fix the thin-walled steel pipe bodies to prevent their positions from shifting, causing concentricity deviations, and affecting the accuracy of welding. Attached Figure Description

[0016] The accompanying drawings, which are included to provide a further understanding of the invention and form part of this invention, illustrate exemplary embodiments of the invention and are used to explain the invention, but do not constitute an undue limitation of the invention. In the drawings:

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

[0018] Figure 2 This is a partial three-dimensional structural diagram of the present invention;

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

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

[0021] Figure 5 This is a three-dimensional structural diagram of the concentric detection structure in this invention;

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

[0023] Figure 7 This is a three-dimensional structural diagram of the welding rotation structure in this invention;

[0024] Figure label:

[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 limit structure 3, limit cylinder 31, limit arc seat 32, anti-slip protrusion 33, concentric detection structure 4, mounting base 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, rotary cylinder 71, rotary disk 72, oil clamp 73, horizontal movement structure 8, controller 9. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be clearly and completely described below in conjunction with specific embodiments and corresponding drawings. Obviously, the described embodiments are only a part of the embodiments of this invention, and not all of them. Based on the embodiments of this invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this invention.

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

[0028] Reference Figures 1 to 7 As shown, this embodiment of the invention provides an automatic welding device for welding thin-walled steel pipes, including two thin-walled steel pipe bodies 6 and a support base 1. Concentric adjustment structures 2 are respectively provided at both ends of the support base 1, and the concentric adjustment structures 2 are slidably engaged with the support base 1. Each concentric adjustment structure 2 is provided with a concentric limiting structure 3, and the concentric limiting structure 3 is slidably engaged 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 positioned towards the welding point of the two thin-walled steel pipe bodies 6. 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, 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 engaged with the support base 1, the adjustment frame 24 is threadedly connected to the adjustment ball screw 22, and the adjustment frame 24 is provided with a circular placement groove 26.

[0030] When the two thin-walled steel pipe bodies 6 are concentrically adjusted, the adjusting motor 21 drives the adjusting ball screw 22 to rotate, thereby causing the adjusting cylinder 23 to extend its position and the adjusting ball screw 22 to move up and down. The up and down movement of the adjusting cylinder 23 causes the adjusting frame 24 to move up and down on the support base 1 via two sliding rods 25, thereby causing the position of the thin-walled steel pipe body 6 to move up and down. The adjustment brings the two thin-walled steel pipe bodies 6 into 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 forces. After welding, whether subjected to axial tensile force, compressive force, or bending force, the stress at the weld can be evenly distributed 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, 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 the welding process; during welding, the shielding gas can evenly cover the molten pool, avoiding contact between the molten pool and harmful gases in the air. For example, when using gas shielded welding, the concentric steel pipe can ensure that the shielding gas forms a stable protective layer around the molten pool, effectively reducing the generation of porosity. At the same time, a stable molten pool can also make the droplet transition more uniform, avoiding defects such as slag inclusions and lack of fusion, and improving the quality of the weld.

[0032] Improving fluid transport efficiency: For thin-walled steel pipes used to transport fluids, concentric welding ensures the consistency of the pipe's inner diameter. This results in a uniform flow velocity, preventing localized areas of excessively high or low velocity. For example, in pipeline systems in industries such as chemical and petroleum, concentrically welded thin-walled steel pipes can reduce pressure loss, improve fluid transport efficiency, and effectively prevent cavitation caused by variations in pipe inner diameter, thus extending the pipeline's service life.

[0033] Reduced pipe vibration and noise: When concentrically welded thin-walled steel pipes are subjected to fluid transport or external vibration, the vibration amplitude of the pipes will be greatly reduced due to the uniform force. For example, in the pipes of HVAC systems, concentrically welded thin-walled steel pipes can reduce the vibration and noise caused by the operation of fans, providing a quieter and more comfortable operating 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 installed at the top of the adjusting frame 24. The limiting arc seat 32 is connected to the telescopic end of the limiting cylinder 31. The limiting arc seat 32 is provided with a plurality of anti-slip protrusions 33.

[0035] After the two thin-walled steel pipe bodies 6 are aligned by adjusting their positions through the two concentric adjustment structures 2, the limiting cylinder 31 moves the arc-shaped seat downwards, thereby causing the anti-slip protrusions 33 inside the arc-shaped seat to move downwards and limit the position of the thin-walled steel pipe body 6, so that the thin-walled steel pipe body 6 is located in the circular placement groove 26. When the two thin-walled steel pipe bodies 6 are initially fixed and adjusted up and down to be aligned, it is necessary to fix the thin-walled steel pipe bodies 6 to prevent the positions of the two thin-walled steel pipe bodies 6 from shifting, causing concentricity deviation, and affecting the accuracy of welding.

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

[0037] When performing concentricity detection on the two thin-walled steel pipe bodies 6, the drive motor 44 drives the drive gear 45 to rotate, which causes the gear ring 43 to rotate within the mounting ring 42. The rotation of the gear ring 43 will drive the concentricity detection sensor 46 to rotate, and perform detection work on the welded area of ​​the two thin-walled steel pipe bodies 6 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 by the two concentric adjustment structures 2 respectively, so that the two thin-walled steel pipe bodies 6 are in a concentric position for welding.

[0038] The concentricity detection sensor 46 utilizes optical imaging technology. It emits light, such as a laser, onto the circumference of the object being measured, and then uses an optical receiving device, such as a CCD camera, to receive the reflected light. By analyzing the image of the reflected light, it calculates the position information of each point on the circumference of the object. If it is to detect whether two objects are concentric, it can compare the positional differences of corresponding points on the circumferences of the two objects to determine 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. The top and bottom of the fixed support 51 are equipped with automatic welding guns 52.

[0040] When welding two thin-walled steel pipe bodies 6, after the two thin-walled steel pipe bodies 6 are concentrically tested and placed in a concentric position, the 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. Afterwards, the thin-walled steel pipe bodies 6 can be rotated by the welding rotating structure 7 to perform full welding work on the thin-walled steel pipe bodies 6.

[0041] In this embodiment, each of the thin-walled steel pipe bodies 6 is provided with a welding rotation structure 7 at its end. The welding rotation structure 7 includes a rotary cylinder 71, a rotary disk 72, and four oil clamps 73. The rotary disk 72 is connected to the rotating end of the rotary cylinder 71, and the four oil clamps 73 are distributed at equal intervals on the rotary disk 72. The four oil clamps 73 clamp the thin-walled steel pipe body 6. The welding rotation 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 bodies 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 carry out the comprehensive welding work on the two thin-walled steel pipe bodies 6. During the initial feeding process of the two thin-walled steel pipe bodies 6, the two welding rotating structures 7 can be moved to both sides by the horizontal moving structure 8 to feed the thin-walled steel pipe bodies 6.

[0043] It should be noted that the horizontal moving structure 8 is existing technology. It can be driven by a hydraulic cylinder or an electric slide table to move the position of the welding rotating structure 7 horizontally, 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. During use, the controller 9 can precisely weld the two thin-walled steel pipe bodies 6 using 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 movement structure 8.

[0045] The above description is merely an embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principle of the present invention should be included within 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 includes a support base (1), and the two ends of the support base (1) are respectively provided with concentric adjustment structures (2), and the concentric adjustment structures (2) and the support base (1) are slidably engaged; Each of the concentric adjustment structures (2) is provided with a concentric limiting structure (3), and the concentric limiting structure (3) and the concentric adjustment structure (2) are in sliding fit; The support base (1) is provided with a concentric detection structure (4), which is set 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). The concentric detection structure (4) includes a mounting base (41) and a mounting ring (42) is provided on the mounting base (41). The mounting ring (42) is provided with a toothed ring (43), and the toothed ring (43) is rotatably connected to the mounting ring (42). The top of the mounting ring (42) is provided with a drive motor (44), and the main shaft of the drive motor (44) is provided with a drive gear (45) that meshes with the gear ring (43). The toothed ring (43) is provided with a concentric detection sensor (46); The automatic welding structure (5) includes a fixed support (51) located at the center of the two thin-walled steel pipe bodies (6), and an automatic welding gun (52) is provided at the top and bottom of the fixed support (51).

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) includes 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 support 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 engaged with the support base (1). The adjusting frame (24) is threadedly connected to the adjusting ball screw (22), and the adjusting frame (24) is provided with a circular placement groove (26).

3. An automatic welding device for welding thin-walled steel pipes according to claim 2, characterized in that: The concentric limiting structure (3) includes a limiting cylinder (31) and a limiting arc seat (32). The limiting cylinder (31) is vertically installed at the top of the adjusting frame (24). The limiting arc seat (32) is connected to the telescopic end of the limiting cylinder (31), and the limiting arc seat (32) is provided with a number of anti-slip protrusions (33).

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

5. An automatic welding device for welding thin-walled steel pipes according to claim 4, characterized in that: The welding rotating structure (7) is also provided with a horizontal moving structure (8) that drives it to move.

6. An 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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