Process for stamping and forming sedan car rear auxiliary frame body

Abstract

The invention provides a process for stamping and forming a sedan car rear auxiliary frame body. The process uses a section of seamless steel pipe as a raw material, the length of the seamless steel pipe is equivalent to the unfolding length of the sedan car rear auxiliary frame body, and the seamless steel pipe is bent to be in shape similar to a finished sedan car rear auxiliary frame body and then serves as a workpiece to be machined. Two bent corners of the workpiece are shaped through a first group of dies. Straight line sections at two ends of the workpiece are shaped through a second group of dies. Two ends of the workpiece are pressed flat and formed through a third group of dies. Two ends of the workpiece are trimmed to be open circular arcs through a fourth group of dies. The open circular arcs at two ends of the workpiece are trimmed and subjected to side punching through a fifth group of dies to enable the workpiece to completely meet the design requirement. The process has the advantages that the device cost is low, the production efficiency is high, the part stability performance is good, maintenance is convenient, and the like.

Description

technical field [0001] The invention relates to a processing technology of auto parts, in particular to a stamping forming technology of a car rear sub-frame main body. Background technique [0002] At present, the main body of the rear sub-frame of many cars is formed by seamless steel pipes, but the steel pipes are hollow structures, the parts are long in length, complex in shape, and require high matching. Hydroforming is generally used in foreign countries, and the equipment investment cost is relatively high. Stamping is also used in China, but manual production is low in efficiency and the stability of parts is not high. Contents of the invention [0003] purpose of the present invention, [0004] In order to solve the above-mentioned problems existing in the prior art, a stamping process for the main body of the rear sub-frame of a car is provided. [0005] In order to achieve the above object, the present invention adopts the following technical solutions: a stam...

AI Technical Summary

Problems solved by technology

[0002] At present, the main body of the rear sub-frame of many cars is formed by seamless steel pipe, but the steel pipe is a hollow structure, the length of the parts is long, the shape is complex, and the matching requirements are high

Hydroforming is generally used in foreign countries, and the equipment investment cost is relatively high. Stamping is also used in China, but manual production is low in efficiency and the stability of parts is not high.

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