A method for internal pressure forming of pipes with hot medium based on molten glass

Abstract

The invention discloses a pipe hot medium internal pressure forming method based on molten glass, and relates to a metal pipe forming method. The problems that according to existing hot medium internal high pressure forming methods, the heating speed is low, heat conducting coefficients are low, sealing is difficult, and forming pressure only can reach about 0-50MPa are solved. The method comprises the steps that 1, a pipe internal high pressure forming temperature interval is determined according to the pipe variety; 2, according to the pipe internal high pressure forming temperature, glass materials are selected; 3, a pipe to be formed is preheated; 4, a pipe blank is vertically placed into a forming die, and die closing and sealing are carried out; 5, the glass materials are heated to obtain molten glass; 6, the glass media are injected into the sealed pipe blank; 7, the pipe blank is heated to internal high pressure forming temperature under high-temperature filling; and 8, material supplementing is carried out; and 9, pressure maintaining is carried out, the molten glass flows out through an overflow valve, die opening is carried out, and the formed deformed-section pipe partis obtained. The pipe hot medium internal pressure forming method is used in the field of internal high pressure forming.

Description

technical field [0001] The invention relates to a metal pipe forming method. Background technique [0002] With the continuous improvement of modern aircraft's high-speed and high-maneuverability requirements, higher and higher requirements are put forward for the lightweight and long life of components. At the same time, reducing the weight of automobiles and airplanes is one of the measures to reduce energy consumption and pollution emissions. The main way to reduce weight is to use lightweight materials and lightweight structures. Lightweight materials include aluminum alloys, magnesium alloys, titanium alloys and composite materials. The main forms of light body structure include integral structure, thin shell and hollow variable section. Most of these materials have poor deformation ability at room temperature, and the elongation is generally less than 10% to 15%. It is difficult to form parts with complex cross-sectional shapes by traditional forming processes at ro...

AI Technical Summary

Problems solved by technology

[0004] The present invention aims to solve the problems of low heating rate, low thermal conductivity, difficult sealing, and forming pressure of only about 0-50 MPa in the existing high-pressure forming method in a hot medium, and provides a pipe heating medium based on molten glass. Press forming method

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