A pipe liquid-filled multi-directional extrusion forming device and method

Abstract

The invention discloses a liquid-filled multi-direction extrusion forming device and method for a pipe. A vertical slide rail structure is provided for the horizontal punch. The main body of the mold is composed of four parts, the upper and lower molds and the front and rear sliders. During the process, it is difficult to seal when the axis of the tube billet is lowered, and it is impossible to form multi-side concave pipe fittings; an extrusion pressure control system is installed in the hydraulic circuit, which solves the problem that the pressure cannot be changed linearly during the extrusion process. During the molding process, when the volume of the inner cavity of the tube blank changes, the pressure can be loaded according to the specified route, and a formed part with a more uniform wall thickness distribution and higher forming accuracy can be obtained; the sequence of filling the pressurized liquid first and then closing the mold is adopted, and the tube The billet is formed into the desired shape under the joint action of the mechanical pressure of the mold and the hydraulic pressure in the pipe; the pipe liquid-filled multi-directional extrusion forming device and method provided by the present invention can form high-strength, high-precision, wall-thickness pipes while reducing costs. Uniform multi-directional concave special-shaped variable-section pipe fittings.

Description

technical field [0001] The invention relates to the technical field of metal pipe forming, in particular to a pipe liquid-filled multi-directional extrusion forming device and method. Background technique [0002] Due to the strict restrictions on energy consumption and exhaust emissions, as well as the improvement of collision safety, the lightweight of automobile structures is becoming increasingly important, which has become the trend of the development of automobiles in the world. For cars, for every 10% reduction in weight, fuel consumption can be reduced by 8%-10%, and emissions can be reduced by 4%. Since the weight reduction cost of automobiles using lightweight materials such as aluminum alloys and magnesium alloys has increased significantly, the main way to reduce automobile weight is to achieve weight reduction through the design of a reasonable force-bearing structure. [0003] Hollow variable cross-section members are a typical lightweight structure. The tradi...

AI Technical Summary

Problems solved by technology

[0009] The purpose of the present invention is to provide a pipe liquid-filled multi-directional extrusion forming device and method to solve the problems existing in the prior art, and to solve the problems caused by the traditional liquid-filled extrusion process under the axis of the pipe blank during the process of making special-shaped variable-section pipe fittings. It is difficult to seal when shifting, it is impossible to form multi-side concave shape components, and the liquid pressure in the pipe increases sharply with the pressing process, and it is impossible to realize the linear change of pressure. It can form high-strength, high-precision, and uniform wall thickness while reducing costs. Inwardly concave special-shaped variable-section pipe fittings

Images