The casting molding process is widely used in the production of large gear seat in the domestic product, because of the case-structural reasons, the problem of the process is complicated, the casting defect is large, the product quality rate is low and the production cost is higher. After the construction of "casting change to welding", the technology is relatively simple, the welding quality is easy to guarantee, the highly product qualification rate and highly efficiency of the material can greatly reduce the manufacturing cost, so the application prospect of the welding in the case gear is broad. However, it is difficult to ensure the processing size of welding, because the material plate is thick and large, the weld is dense, the welding stress is large, it is easy to produce the crack, and the welding deformation is large, and the processing size is difficult to guarantee.This paper mainly studies the welding process of the lower box of large gear seat. On the basis of process analysis, a reasonable welding process is developed and implemented. The results show that the welding method combined with CO,2 ,shielded welding and argon shielded welding can fully meet the design requirements of the structure by choosing the right welding size, welding sequence, welding parameters, groove form and corresponding welding processes such as pre-welding, in-welding and post-welding heat treatment
关键词
齿轮座下箱体焊接应力与变形焊接工艺分析工艺措施
Keywords
lower Box of gear seatwelding stress and deformationanalysis of welding processprocess measures
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