Projection welding structure of automobile body connecting reinforcer and process thereof

Abstract

The invention discloses a projection welding structure of an automobile body connecting reinforce. The structure comprises a reinforcing pipe and a stamping part, and a through hole is formed in the stamping part; three convex hulls are arranged on the stamping part, and the three convex hulls are uniformly distributed around the through hole; the bottom end of the reinforcing pipe is welded to the three convex hulls, welding is easy, the strength is enough, welding can be conducted in a small space, welding thermal deformation is hardly affected, the welding time is shortened, and therefore the production cost is reduced. The invention further discloses a projection welding process of the automobile body connecting reinforcer, the three convex hulls on the stamping part are molten duringprojection welding, so that the stamping part and the reinforcing pipe are welded together, the welding strength is enhanced, welding can be conducted in a small space, welding thermal deformation isprevented, and the production cost is reduced.

Description

technical field [0001] The invention relates to a projection welding welding structure and a technology of a connecting reinforcement of an automobile body. Background technique [0002] Compared with the current design level of foreign countries, the current automobile design still has a huge gap. Under such an environment, domestic research on structures and the development of practical applications have become very important. Major OEMs have increasingly stringent control over the R&D investment cost of new models and shorter R&D cycles, which directly put forward higher requirements for automakers and auto parts manufacturers, especially in the structure of auto parts. In the design, the structure has to be simplified but the original strength must be guaranteed, so as to achieve the purpose of cost reduction. In the design and welding stage of stamping parts in the automotive industry, the existing structures are all welded together by arc welding through fixture posit...

AI Technical Summary

Problems solved by technology

In the design and welding stage of stamping parts in the automotive industry, the existing structures are all welded together by arc welding through fixture positioning. The welding time of arc welding is long and the cost is relatively high. The heat generated by arc welding is also high. It will lead to deformation of the parts, and the small space will also lead to weak welding, which will reduce the connection strength

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