Method for achieving one-time forming of welding seam of chassis suspension shell structure

Abstract

The invention discloses a method for achieving one-time forming of a welding seam of a chassis suspension shell structure. The method comprises the steps that an inner plate and an outer plate are placed in a clamp, a button is started, the clamp is clamped, a robot starts to conduct welding, an upper long weld seam and a lower short weld seam are welded, a third weld seam is moved to the arc tail end of the third weld seam to be fixed through a welding spot, and when an effective weld seam is welded, a clamp second time opening request is output to a PLC,; when the welding is carried out to a point fixing position, a welding permission request is output to the PLC again; when the welding is continued to be carried out to a track point in front of a positioning mechanism, an instruction for waiting for the clamp to be opened in place for a second time is set in a program, and timing is set in a T-shaped graph and is associated with the instruction; if a signal that the clamp is opened in place for the second time is received in the timing, the positioning mechanism is reset, the welding is normal until the end, and otherwise, the welding is interrupted. The method for achieving the one-time forming of the welding seam of the chassis suspension shell structure has no other requirements on automatic welding equipment and is simple to operate, stable in quality and suitable for one-time forming welding of any space-limited structure, and the welding seam is formed at one time.

Description

technical field [0001] The invention belongs to the field of automatic welding of automobile parts, and in particular relates to a method for realizing one-time forming of a welding seam of a chassis suspension shell structure. Background technique [0002] The chassis suspension in auto parts is one of the three core components of the vehicle structure, and is an important carrier of transmission and load-bearing mechanics. The product structure design includes box structure, shell structure and other types. Solder spot connection and weld seam connection are adopted in the above. During the design process of solder spot connection, there is a distance between the solder spots, the space is sufficient, and the accessibility of welding clamps is good, so that welding is easy to achieve one-time forming during process development. However, in the design of weld strength, in order to achieve the premise of meeting the strength requirements and being economical, the welding sea...

AI Technical Summary

Problems solved by technology

[0004] The joint design of welding seam overlap is sometimes located directly below the process hole of the shell structure. In addition, the surface of the plate is complex, and the space formed between the positioning mechanism and the positioning mechanism is limited. The accessibility of the welding torch is poor. Generally, the welding torch is used at the end of welding. The method of large-angle welding wire long dry stretching method realizes lap joints, but the corresponding weld length is insufficient, the appearance of the end of the weld is irregular, the joint is not full, and defects such as burn-through occur, resulting in the scrapping of parts

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