Rolling forming method and device for metal special-shaped variable-section pipe based on hydraulic forming

Abstract

The invention discloses a rolling forming method and device for a metal special-shaped variable-section pipe based on hydraulic forming, relates to a metal pipe part forming technology and aims at solving the problems that in an existing method, the investment cost is high, the production efficiency is low, and crumpling and cracking are likely to be generated due to the friction effect. Rollers are obtained, and forming technology parameters in the rolling forming process are determined; the two ends of a pipe blank are sealed and put into grooves of the upper roller and the lower roller; theupper roller is pressed down and is engaged with the lower roller, and certain die combining force is applied; and the pipe is filled with a liquid medium; the rollers rotate according to a preset angle to drive the pipe to move, and needed section characteristics are formed in the roller grooves. By means of the supporting effect of liquid pressure, a rolling technological method is adopted forforming the metal pipe, sliding friction of traditional inner high pressure forming is changed into rolling friction of the rolling technology, meanwhile, the friction direction is changed so that thecondition that friction impedes material flowing can be changed into the condition that friction facilitates material flowing, and the product forming quality is improved.

Description

technical field [0001] The invention relates to the forming technology of metal pipe parts, in particular to a rolling forming method and device for special-shaped variable-section pipes under the condition of filling hydraulic pressure. 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. In industrial manufacturing, the integration of forming and forming is the best technical way to obtain the best performance of components and improve production efficiency at the ...

AI Technical Summary

Problems solved by technology

[0005] The present invention aims to solve the problems of high preparation cost and low forming efficiency in the existing internal high-pressure forming process of special-shaped and variable-section metal pipes, and the formed parts are prone to uneven deformation, bursting, and dead wrinkles. A method and device for rolling forming of metal special-shaped variable-section pipes based on hydroforming

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