Impact rolling machine head for welding and welding with trailing device

Abstract

The invention relates to the field of welding, in particular to an impact rolling machine head for welding and a welding with trailing device. The welding with trailing device comprises an air pump and the impact rolling machine head for welding. An air inlet is formed in a housing of the impact rolling machine head for welding; an air cylinder is arranged in the housing; a piston divides the aircylinder into an upper space and a lower space; the upper end of an impact rod penetrates through the bottom wall of the air cylinder in a sliding manner and extends into the lower space; the lower end of the impact rod is connected with a rolling wheel structure; the rolling wheel structure comprises a rolling cam and a rolling concave wheel; the rolling concave wheel is positioned at the front end of the impact rolling machine head for welding in the moving direction; and the rolling cam is positioned at the rear end of the impact rolling machine head for welding in the moving direction. Thepiston in the air cylinder is pushed by the air pressure to move, a mechanical impact force is applied to weld metal in the high-temperature state, a melt in a high-temperature welding area is extruded to the middle by the rolling concave wheel, and when being cooled, the melt is transversely rolled by the rolling cam, so that the purpose of preventing welding hot cracks and delayed cold cracks generated in a welding seam area is achieved.

Description

technical field [0001] The invention relates to the field of welding, in particular to an impact rolling head and a welding device for welding. Background technique [0002] During welding, the welded structure will generate greater stress, and the welded structure is also prone to greater deformation and even cracks. Welding stress poses a great threat to the safety of structures. Low-alloy high-steel has excellent mechanical properties and can withstand a high level of working load. It has been widely used in aerospace, national defense, rail transportation and other fields, and is often used as an important load-bearing structure material in products. However, the weldability of low-alloy high-strength steel is poor, mainly reflected in the large welding stress deformation, prone to hot cracks and delayed cracks. After welding, correction and heat treatment are required, which increases production costs and affects product quality, especially delayed cracks. The service...

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide an impact rolling machine head and a welding device for welding, so as to solve the welding problem that hot cracks or cold cracks often exist in the welding

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