Welding process of large-diameter annular part

Abstract

The invention discloses a welding process of a large-diameter annular part. The welding process particularly comprises the following steps that (1) cleaning is carried out before welding; (2) primary positioning connection is carried out on the part to be welded through a manual padding argon arc welding tack-weld method; (3) the end, with a flange edge, of the part to be welded is fixed to a disk; (4) densification tack-welding is carried out on the connecting position of the part through vacuum electron beams; (5) sealing welding is carried out on the intervals of densification tack-welding in the step (4) through vacuum electron beams; (6) the part is taken out of a vacuum chamber, excess weld metal of a manual argon arc welding point is ground through a hand blower gun; (7) welding is carried out through vacuum electron beams. Through the welding process, the welding shrinkage amount of the part is largely reduced, the design and manufacturing expenses caused by a vacuum electron beam welding clamp in a traditional welding process are saved, and therefore the welding and machining cost is reduced. Meanwhile, the clamping work time of the part is saved, the labor intensity is relieved for a worker, and the production efficiency of the part is improved.

Description

Technical field [0001] The invention belongs to the technical field of welding processing, and relates to a welding process of a large-diameter annular part. Background technique [0002] Welding is a processing technology and a connection method in which two workpieces are bonded together by heating, pressing, or both. In the field of welding, metal welding is very common. The quality of the welding process is directly related to the quality of the welding and affects the product qualification rate. Especially for the welding of large-diameter ring-shaped parts, for example, when three large-diameter ring-shaped parts are welded by vacuum electron beam, the butt joints of the parts are easily cracked on both sides due to the tensile stress on both sides, resulting in gaps at the joints. Too large can not be welded, in order to prevent the gap of the weld from being too large, the welding fixture is usually used to compress the welding. The specific method steps are as follows...

AI Technical Summary

Problems solved by technology

However, due to the weld reinforcement in the argon arc welding spot with filler, after the vacuum electron beam welding is completed, there are also incomplete penetration defects at the reinforcement, and the parts need to be repaired by manual argon arc welding, and there is welding depression and deformation at the repair welding place , the welding shrinkage is large, which affects the product quality; at the same time, the repair welding increases the processing cost of the parts, increases the labor intensity, and reduces the production efficiency of the parts

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