Extrusion die and method for ultra-slender metal thin-walled pipe

Abstract

The invention discloses an extrusion molding die for ultra-slender metal thin-walled pipes, which comprises a lower die bracket, a lower die base, a die, a punch, an upper die bracket, an upper die base, an extrusion needle, an extrusion needle adjustment rod, Extrusion needle support, extrusion needle support rod, elastic screw, limit nut; the present invention also provides a method for extrusion forming of ultra-slender metal thin-walled pipes. Tighten the elastic screw and fix it so that the extrusion needle moves down synchronously with the punch. When the punch contacts the blank, the travel limit nut contacts the extrusion needle support; loosen the elastic screw, the extrusion needle is separated from the punch, and the travel limit The position-limiting effect of the nut keeps the extrusion needle stationary, and the punch continues to move downward, and the blank is extruded from the ring-shaped gap between the die and the extrusion needle to obtain a pipe. During the extrusion forming process of the billet, there is no axial relative movement between the extrusion needle and the die, which can prevent the extrusion needle from being broken, and solve the problem of limited length when the extrusion method is used to manufacture ultra-thin metal pipes.

Description

technical field [0001] The invention relates to the technical field of extrusion forming of pipes, in particular to an extrusion die and method for ultra-slender metal thin-wall pipes. Background technique [0002] Metal pipe fittings are widely used in various fields of national economy and daily life, and are indispensable basic components in various fields of manufacturing. Metal pipes can be divided into two categories: welded pipes and seamless pipes according to their manufacturing methods. The production of seamless steel pipes mainly includes several processes such as rolling, extrusion, drawing, and spinning. The rolling method to produce seamless pipes requires multiple processes such as perforation, multi-pass rolling, and tension reduction. It requires a complete set of production equipment, and the production line has a huge composition, and is only suitable for large-scale and large-scale pipe production. Even if the rolling tube technology is constantly impr...

AI Technical Summary

Problems solved by technology

Even if a larger extrusion ratio is used, the length of the finished pipe will not exceed 200mm, which obviously cannot meet the actual requirements of many applications

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