A production process for automobile exhaust pipes formed first and then punched

Abstract

The invention discloses a production process of an automobile exhaust pipe punched after being molded. The production process is characterized by comprising the steps of S1, pretreating: clipping / cutting an exhaust pipe plate, and then, polishing; S2, circle rolling: carrying out circle rolling on the treated exhaust pipe plate by using a two-roller circle rolling technology; S3, necking the circle-rolled exhaust pipe fitting; S4, welding and molding the necked exhaust pipe; S5, placing the welded and molded exhaust pipe into a punching device to punch in an internal punching way; and S6, finally, clearing the surface of the punched exhaust pipe workpiece. The problem that burrs appear at the edges of holes is effectively solved, meanwhile, the local deformation phenomenon in the punching process can be inhibited, and the technical effects of increasing the production efficiency and reducing the production cost are achieved.

Description

technical field [0001] The invention relates to an automobile exhaust pipe formed first and then punched, in particular to an automobile exhaust pipe made by a punching device for preventing local deformation. Background technique [0002] The punching process of the existing automobile exhaust pipe is usually: (1) punching the exhaust pipe plate; (2) rolling the exhaust pipe plate that has been punched; (3) finally welding and forming. However, a large number of production practices have shown that the above-mentioned process has the following technical problems: in the process of rolling the exhaust pipe plate that has been punched, burrs are prone to appear on the edge of the hole, resulting in a decline in product quality, which requires subsequent processing to deal with burrs , so that the production efficiency is reduced and the production cost is increased. In addition, the traditional punching process of automobile exhaust pipes rarely considers the local deformati...

AI Technical Summary

Problems solved by technology

[0003] In order to solve the above-mentioned deficiencies in the prior art, the present invention provides an automobile exhaust pipe that is formed first and then punched, which can effectively improve the problem of burrs on the edge of the hole and at the same time suppress local deformation during the punching process to improve production efficiency , the technical effect of reducing production costs

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