Rolling, welding and spinning manufacturing method of automobile catalytic converter shell

Abstract

The invention discloses a rolling, welding and spinning manufacturing method of an automobile catalytic converter shell. The method adopts a process of combining pipe rolling, welding and spinning, and comprises the following steps of rolling a metal plate on a plate rolling machine to form a pipe barrel with a certain size; welding a joint of the pipe barrel to form a pipe, and adopting pure argon as laser shielding gas; and carrying out necking spinning on the two ends of the pipe through a spinning device, and forming a front end cone and a rear end cone. According to the manufacturing process of the automobile catalytic converter shell, the metal plate is directly used as a raw material, so that the production cost is reduced compared with direct purchase of a seamless pipe; laser is adopted for welding, the welding speed is high, the welding seam quality is good, and the production efficiency and the product quality are improved; and the problems of low production efficiency and complex machining process in the prior art are solved, the product quality is improved, the production cost is reduced, the machining process is simple, and the degree of automation is high.

Description

technical field [0001] The invention belongs to the technical field of material forming, and in particular relates to a rolling, welding and spinning manufacturing method of an automobile catalytic converter casing. Background technique [0002] With the rapid growth of my country's car ownership, the auto industry has become an important strategic and pillar industry of the national economy, and the scale of the domestic auto market ranks first in the world. The auto parts industry is an important part of the automobile economy, and its sales revenue accounts for more than 40% of the sales revenue of complete vehicles, which is an important foundation for the development of the automobile industry. During the development of high-performance and lightweight automobiles, in order to meet the requirements of automobile exhaust emission standards, ferritic stainless steel with high temperature resistance, corrosion resistance, high thermal conductivity and low thermal expansion...

AI Technical Summary

Problems solved by technology

[0006] Aiming at the above technical problems, the present invention proposes a method for manufacturing an automobile catalytic converter housing, which solves the problems of high production cost, low production efficiency, complex processing technology and automation degree in the processing of the automobile catalytic converter housing. lower puzzle

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