Welding fixture for muffler clamshell end cones for exhaust systems

Abstract

The invention relates to a welding jig for an exhaust system silencer clamshell type end taper, and belongs to the technical field of welding tool jigs. The welding jig relates matching between a large port interior positioning pin and a large port exterior positioning pin, selecting of the supporting position of a supporting block in a clamshell, controlling of the supporting block over the welding line position, matching of a small port interior positioning pin and a small port exterior positioning pin, pneumatic opening of a small port and guaranteeing of a pushing mechanism on the small port interior positioning pin and an outer positioning sleeve, and controlling of requirements for repetitive operation consistency, guaranteeing of a clamshell shell positioning and compression pushing mechanism on the clamshell shell positioning and compression block and detection sensor repetitive operation consistency, control of a clamshell shell positioning and compression block and a clamshell interior supporting block over a clamshell shell and material selecting; and rapid radiating can be effectively achieved, and welding deformation is reduced. The welding jig is easy to operate and maintain, high in practicability, high in production controllability, high in welding quality and low in requirement threshold for a power source needing by driving, and the equipment development and maintaining cost is saved.

Description

technical field [0001] The invention relates to a welding fixture used for a clamshell-shaped end cone of an exhaust system muffler, and belongs to the technical field of welding fixtures. Background technique [0002] Nowadays, in the automotive industry, the end cones of the hot-end catalyst package of passenger cars mainly include stamped integral end cones, cylinder spinning end cones and clamshell welded end cones. As the stamping type end cones are becoming more and more complex and the angle of the end cones cannot be satisfied, the clamshell welding end cones are more widely used in actual design and production, and at the same time, higher requirements are put forward for the consistency and pass rate of welded products. . [0003] At present, the clam shell type welding tool mainly adopts the following two schemes: 1. The upper and lower clam shells are packaged and positioned as a whole, mainly controlling the shape of the clam shell and the ports at both ends. T...

AI Technical Summary

Problems solved by technology

Defects of this scheme: First, the full-shaped positioning of the upper and lower clamshells requires extremely high requirements for the size of the clamshell parts, high requirements for the production and processing of the upper and lower molds, and requires a lot of processing time. The subsequent fitter grinding requirements are high and time-consuming. The stability of the long-term product cycle and the wear and tear of the product mold have high requirements. After the welding tooling is worn out, it is difficult to repair, and the cost is extremely high; The rebound and transportation deformation will affect the production stability

Defects of this scheme: First, the operator needs to observe whether the fitting is in place, which is easy to cause the side of the clam shell to be misaligned, and the middle of the shell is not controlled. The welding seam at both ends of the clam shell is long, and the heat is large, which will deform the shell Seriously, for example, the sensor on the clam shell is affected by the deformation of the shell, and the position deviation is large, which cannot guarantee the overall relative size, which has a great impact on subsequent welding and a high scrap rate

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