A welding device for steel structure production and processing

By using an internal expansion clamping structure and a welding device with a copper sleeve, the deformation problem during steel pipe welding was solved, the position of the steel pipe was fixed and heat dissipation was achieved, and the stability and strength of the welding were improved.

CN224508783UActive Publication Date: 2026-07-17LUOYANG SHENGHONG JINNUO TECH CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
LUOYANG SHENGHONG JINNUO TECH CO LTD
Filing Date
2025-06-25
Publication Date
2026-07-17

AI Technical Summary

Technical Problem

In the existing technology, round steel pipes are prone to deforming into elliptical shapes due to high temperatures during welding, resulting in non-circular welds and making it difficult for welding devices to effectively fix the position of the steel pipes.

Method used

The internal expansion and centering clamping structure is adopted. The centering clamping of the steel pipe is achieved by the cooperation of the tensioning device and the centering device, the tensioning airbag and the cylinder pusher, and the welding heat dissipation is accelerated by the cooperation of the copper sleeve and the welding device.

Benefits of technology

This method fixes the position of the steel pipe during welding, preventing deformation, and accelerates heat dissipation during the welding process, thereby improving welding strength and stability.

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Abstract

The utility model relates to welding device technical field, and disclose a kind of welding device for steel structure production and processing, and the structure is realized to the centering and tensioning of steel pipe by setting tensioning device, tensioning air bag, centering device, push frame etc., tensioning device is pulled out, subsequently the steel pipe needing processing is placed in the outside of round shaft and tensioning air bag, make steel pipe cover in the outer ring of round shaft, subsequently copper bush is connected in the inside of sliding slot by carding tooth, right slider and left slider of sleeveing steel pipe are pushed to the inside of frame body, subsequently starting centering device, cylinder is extended to push frame by output shaft, make the silica gel block of push frame inner wall closely adhere to the outer wall of steel pipe, subsequently inject compressed air to the inside of tensioning air bag by air nozzle, air enters the inside of tensioning air bag and expands to the outside, top in the inner wall of steel pipe, and the centering and tensioning effect to steel pipe is achieved.
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Claims

1. A welding device for steel structure production and processing, comprising a frame body (1), characterized in that: The frame (1) has symmetrical slots (11) inside, and a tensioning device (2) is slidably installed inside the slots (11). Two sets of centering devices (3) are symmetrically installed in the middle of the frame (1). The centering device (3) includes a cylinder (31) and a pusher (32). The cylinder (31) is symmetrically installed inside the frame (1) from top to bottom. The end of the output shaft of the cylinder (31) is fixedly connected to the pusher (32) inside the frame (1). The inner arc surface of the pusher (32) is uniformly provided with silicone blocks (33) in an arc shape. The top wall inside the frame (1) has a sliding groove (12). A welding device (4) is slidably installed inside the sliding groove (12). A steel pipe (5) is placed on the outer ring of the tensioning device (2).

2. The welding device for steel structure production and processing according to claim 1, characterized in that: The tensioning device (2) includes a right slider (21) and a left slider (22). One side of the right slider (21) and the left slider (22) is provided with a round shaft. The outer ring of the round shaft is provided with tensioning airbags (23) in a linear array. The other side of the right slider (21) and the left slider (22) is provided with an air nozzle (24). The air nozzle (24) is connected to the inside of the tensioning airbag (23).

3. The welding device for steel structure production and processing according to claim 2, characterized in that: A copper sleeve (25) is provided between the circular shafts. The end of the circular shaft on one side of the right slider (21) is provided with a circular groove (26) in an even manner. The inner ring of the opening of the copper sleeve (25) is provided with a circular tooth (27) in an even manner. The shape and size of the tooth (27) are compatible with the groove (26). The copper sleeve (25) is engaged in the groove (26) by the tooth (27).

4. The welding device for steel structure production and processing according to claim 1, characterized in that: The welding device (4) includes a motor (41) and a sliding plate (42). The motor (41) is fixedly installed on the inner top wall of the frame (1). The sliding plate (42) is symmetrically slidably installed inside the slide groove (12). The output shaft of the motor (41) is connected to a screw shaft (43) through a coupling. The screw shaft (43) is located inside the sliding plate (42) and is threadedly connected to the sliding plate (42). The screw tracks inside the sliding plate (42) are opposite. One side of the sliding plate (42) is provided with an arc rail (44). The outer ring of the arc rail (44) is provided with an annular groove (45). When the arc rail (44) is closed, the annular groove (45) forms a circular guide rail.

5. The welding device for steel structure production and processing according to claim 4, characterized in that: An mounting plate (46) is slidably installed on the outer wall of the annular groove (45). A welding nozzle (47) is fixedly installed on one side of the mounting plate (46). A motor (48) is fixedly installed on the other side of the mounting plate (46) on the side of the welding nozzle (47). The output shaft of the motor (48) is connected to a disc via a coupling. The outer surface of the disc is in contact with the inner wall of the annular groove (45).