A Welding Process for Large Diameter Ring Parts

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 large-diameter annular piece welding process. Background technique [0002] Welding is a process and connection method that produces an interatomic bond between two workpieces through heating, pressure, 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, which affects the product qualification rate. Especially for the welding of large-diameter ring parts, it is particularly important. For example, when three large-diameter ring parts are subjected to vacuum electron beam positioning welding, the part butt joints are easily cracked to both sides due to the influence of tensile stress to both sides, resulting in gaps at the butt joints. If it is too large, welding cannot be carried out. In order to prevent the gap at the welding place from being too large, welding fixtures...

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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