Piercing-rolling integrated four-section type composite ejector head

Abstract

The invention relates to a seamless tube rolling technology in the nonferrous metal and ferrous metal calendaring molding process, and particularly relates to a piercing-rolling integrated four-section type composite ejector head. The piercing-rolling integrated four-section type composite ejector head comprises a nose part (5), a cone body and a straight section, wherein the cone body comprises asection I, a section II and a section III which are sequentially and smoothly connected; the beta angle of the section I ranges from 3 degrees to 4 degrees, the beta angle of the section II ranges from 5.3 degrees to 7.2 degrees, and the beta angle of the section III ranges from 4.38 degrees to 5.2 degrees; the outer edge of the straight section is a cylindrical surface, namely the maximum diameter of the ejector head; and the length ratio of the section I to the section II to the section III to the straight section is 1.4: 3.0: 2.4: (1.0-1.04). The four-section type composite ejector head ismore suitable for metal deformation, the phenomena that in the process of producing a nonferrous metal seamless tube through a piercing and skew rolling technology, the center is not loose, and consequently the ejector head is bonded, and rolling is not engaged are avoided, and the problem that smooth rolling cannot be achieved when the inner surface of a tube body is rolled and folded and a tailclamp is clamped in the rolling process is solved.

Description

technical field [0001] The invention relates to the rolling technology of seamless pipes in the calendering process of non-ferrous metals and ferrous metals. It mainly involves the design and manufacture of tools and molds for materials such as zirconium, niobium, titanium, Tc4, and Ti80. head. Background technique [0002] The production of traditional hot-rolled seamless pipes mainly involves calendering of ferrous metals. The process tools do not have the conditions to produce and roll non-ferrous metals. Optimizing process parameters and tool design has realized the process route of rolling non-ferrous metals in the traditional way. The non-ferrous metals in the process of thermoplastic deformation are integrated, fixed process and piercing, rolling, and setting process, which are suitable for zirconium, niobium, titanium and Tc4 , Ti80 and other non-ferrous metal materials, the piercing-rolling integrated four-stage composite plug realizes the piercing and rolling of t...

AI Technical Summary

Problems solved by technology

[0004] In order to solve the above problems, the present invention provides a four-stage composite plug with piercing and rolling. The four-stage composite plug is more suitable for metal deformation, and avoids the problem of loose center during the production of non-ferrous metal seamless pipes by piercing and cross-rolling. The phenomenon of sticking the plug and not biting in the rolling solves the problem that the inner surface of the pipe is rolled and the jam and tail jam in the rolling cannot realize smooth rolling

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