Internal high pressure near-net forming process for special-shaped high-strength pipe parts

Abstract

The invention relates to an internal high pressure near-net forming process for special-shaped high-strength pipe parts. The special-shaped pipe parts produced through the internal high pressure near-net forming process, especially variable-diameter and variable-wall-thickness high-strength light pipe parts mainly include three series of products of automobile parts such as automobile subframes, automobile body frames and engine frames, aerospace parts such as satellite edge beams and launchers, and aviation parts such as airplane inlets and oil paths. The parts manufactured through the internal high pressure near-net forming process have the remarkable characteristics that the parts are manufactured integrally, structure compactness is good, structural strength and rigidity are high, the material utilization rate and manufacturing efficiency are high, and the production process is clean, environmentally friendly and free of pollution, and the overall weight, material consumption and production cost of the parts can be obviously lowered.

Description

technical field [0001] The invention relates to an internal high-pressure near-net forming process, which can directly process pipe fittings into special-shaped high-strength parts for use in automobiles, aerospace, aviation and vehicles, and belongs to the technical field of metal product production technology. Background technique [0002] Internal high pressure forming technology is a new forming technology invented by the United States and Germany in the 1990s. It was first applied in the manufacture of aerospace satellite launchers, aircraft oil circuit systems and other parts, and was quickly extended to automobiles, rail vehicles and other industries to solve the problem of The "separate hot stamping + welding + shape correction" technology has been used to manufacture tube (shell) parts such as unstable performance, insufficient precision, and low efficiency. The performance has been significantly improved, and it is the most effective process technology for high-qua...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to overcome the above-mentioned disadvantages and provide an internal high-pressure near-net forming process for special-shaped high-strength pipe parts, which solves the problems of complex forming process, heavy weight, unstable quality, short life and low efficiency of special-shaped high-strength pipe parts in the past. To avoid excessive thinning or cracking of the tube body, it can reduce the weight of the finished parts by 20-40%, increase the life by 80-100%, and improve the efficiency by 30-50%.