Pre-forming die of automobile engine exhaust system manifold

Abstract

The invention provides a pre-forming die of an automobile engine exhaust system manifold and solves the problem that the existing forming dies are insufficient in workpiece compression. The pre-forming die is characterized in that a lower die structure comprise a pressing plate which is mounted on a lower fixing plate, a forming lower die is mounted in the pressing plate and connected with the lower fixing plate, an ejector pin is mounted in the lower fixing plate, the ejector pin vertically penetrates the lower fixing plate, a lower base plate and a lower die plate, and the lower portion of the ejector pin is connected with the guide rod of a nitrogen cylinder which is mounted on a mounting plate. By the pre-forming die, in-place pre-forming of workpieces through one-step punching is guaranteed.

Description

technical field [0001] The invention relates to the field of stamping processing of components of an automobile engine exhaust system, in particular to a preformed mold for a manifold of an automobile engine exhaust system. Background technique [0002] An automobile engine exhaust system manifold, which is formed by stretching the upper half shell and the lower half shell together, then cutting them, and then welding them together, because the upper half shell and the lower half shell are stretched together The forming surface height is high and the forming surface is complex. One-time direct stamping and stretching can easily lead to cracking of the shell. Therefore, the workpiece needs to be preformed first. The schematic diagram of the preformed workpiece structure is shown in figure 1 and figure 2 , due to the high tensile height and large stretching area of ​​the pre-formed material, there will be a problem that the workpiece is not formed properly due to insuffi...

AI Technical Summary

Problems solved by technology

[0003] In view of the above problems, the present invention provides a pre-forming die for the manifold of the automobile engine exhaust system, which solves the problem of insufficient compression of the workpiece by the existing forming die, and ensures that the workpiece can be pre-formed in place once stamping.

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