Welding method for polygonal structural part

A technology of polygonal structures and structural parts, applied in welding equipment, arc welding equipment, resistance welding equipment, etc., can solve problems such as uneven thickness and welding quality defects at ridges
CN112846461AActive Publication Date: 2021-05-28ANSTEEL BEIJING RES INST
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Patent Information

Authority / Receiving Office
CN Β· China
Current Assignee / Owner
ANSTEEL BEIJING RES INST
Publication Date
2021-05-28

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Abstract

The invention provides a tungsten electrode pulse welding method for a polygonal structural part. The polygonal structural part comprises a first component and a second component. The tungsten electrode pulse welding method further comprises the following steps: S10, inserting at least one portion of the second component into the first component in a matched mode to form a joint portion; S20, fixing the first structural part and the second structural part; and S30, rotating a welding gun around the first component and the second component to weld a plurality of welding areas of the joint portion, wherein the multiple welding areas comprise side areas and edge areas, the side areas of the joint portion are welded by using a first current, the edge areas of the joint portion are welded by using a second current, and the second current is larger than the first current. According to the welding method, welding is carried out, the welding process is fully automatically carried out, a groove is not formed, welding wires are not filled, and the tungsten electrode pulse welding method is simple to operate. The problem of welding defects at the corners of the polygonal structural part can be solved, welding parameters can be accurately controlled, and therefore the problems of welding heat access and welding deformation are reduced.
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Description

technical field

[0001] The invention relates to the field of welding technology, in particular to a welding method for polygonal structural parts. Background technique

[0002] Welding, also known as welding, is a manufacturing process and technique that uses heat, high temperature, or pressure to join metal or other thermoplastic materials such as plastics. For some structural parts with special shapes, such as polygonal structural parts such as engineering hexagonal pipes mentioned in Chinese patent CN109543333A, it is often impossible to completely penetrate the boss of the transition section by using general welding methods and process parameters, and the heat input must be increased . This leads to defects such as undercut, weld penetration, and high weld reinforcement after welding, especially at the edges and corners of structural parts, which are prone to welding quality problems, which seriously affect the quality of welded joints. Contents of the invention [0...

Claims

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