Multi-male-die one-time extrusion forming method for spatial bending pipe

Abstract

The invention discloses a multi-male-die one-time extrusion forming method for a spatial bending pipe.. A multi-male-die extrusion device comprises four male dies, a blank, a female die and a mandrel part and extrudes a model simply. The flow state of the blank in three-dimensional space is controlled by changing the speed of each male die, so that spatial turning and bending are realized, and the complex bending pipe fitting in the three-dimensional space is formed. The method has the advantages as follows: the wall thickness of the prepared bending pipe fitting is uniform, crinkling is avoided, a cross section is free of distortion, turning and bending can be performed in the three-dimensional space, and the complex bending pipe fitting is formed. The method has the effects as follows: bending can be produced in the three-dimensional space, the surface quality of the spatial bending pipe fitting is good, internal stress in a metal pipe fitting is very small, the formed bending pipe fitting is free of deformation basically, and the quality is good.

Description

technical field [0001] The invention discloses a multi-convex die one-time extrusion molding method for space bending pipes, and relates to medium and thin-walled pipe bending parts and a preparation process thereof, in particular to a space bending pipe part and a mold extrusion molding method thereof. Background technique [0002] With the development of forming equipment and manufacturing technology, pipe bending parts with complex shapes appear more and more frequently in industrial fields, especially in high-tech industrial fields, such as oil transportation of aircraft, ships, automobiles, gas pipelines, chemical industry, etc. There are also some brackets. Because the use of curved pipe fittings instead of the original wire or plastic pipes can reduce weight and improve durability. With the widespread application of pipe bending parts, people have higher and higher requirements on the bending quality and forming process of pipe materials. Most of the curved pipe fitt...

AI Technical Summary

Problems solved by technology

With the widespread application of pipe bending parts, people have higher and higher requirements on the bending quality and forming process of pipe materials. Most of the curved pipe fittings produced by traditional methods such as push bending and rolling bending have some defects, such as the reduction of the outer wall. Defects such as thinness and cracking, thickening of the inner wall, wrinkling, and cross-sectional distortion, and the bending angle and direction of the pipe are limited, so it is impossible to prepare complex space bending pipes at one time

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