Vibration type seamless three-way pipe cold extrusion forming die

Abstract

A vibration type seamless three-way pipe cold extrusion forming die comprises an upper die (1) and a lower die (12), wherein a forming hole (13) used for mounting a third extrusion tap is formed in the lower die (12), and the axial line of the forming hole (13) intersects with the axial line of a to-be-extruded straight pipe. The die is characterized in that the lower die (12) is formed by assembling an upper half lower die (3) and a lower half lower die (6); the lower part of the lower half lower die (6) is supported on an end surface bearing (9); the lower half lower die (6) and the upper half lower die (3) can rotate oppositely around the central axis of the lower die; an eccentric vibration mechanism (14) is connected to the lower half lower die (6) and can enable the lower half lower die (6) to vibrate; and a partition sleeve (5) capable of preventing metal deformed by extrusion from entering the junction surface of the upper half lower die (3) and the lower half lower die (6) is mounted in the forming hole (13). The advantages of the eccentric vibration mechanism in cold extrusion processing of a seamless three-way pipe are fully utilized, so that based on the effect of guaranteeing high hardness, high rigidity and excellent fatigue resistance of the three-way pipe, the service life of the extrusion tap is greatly prolonged, the extrusion torque is reduced, and the processing quality of the three-way pipe is remarkably improved.

Description

technical field [0001] The invention relates to a pipe processing die, in particular to a die for forming a three-way pipe by cold extrusion of a straight pipe, specifically a die capable of generating small vibrations in the lower die to reduce propulsion resistance and improve extrusion tap The vibration-type seamless tee pipe cold extrusion molding die has a longer service life, reduces the extrusion torque, and improves the processing quality of the tee pipe at the same time. Background technique [0002] At present, tee pipes are widely used in pipe networks for transporting liquids, gases, and agricultural irrigation, and are one of the most basic connection units in pipe networks. With the rapid development of my country's petroleum industry and agriculture, the demand for pipe connectors is increasing day by day, and there are more and more types of pipe fittings. This puts forward higher requirements for the performance of the three-way pipe and its anti-fatigue...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to design a method that can reduce the forming process and solve the problems of uneven cross-section wall thickness of the steel pipe, metal folds on the outer surface of the steel pipe, and metal accumulation in the pipe that exist in the existing seamless tee pipe cold extrusion process. Resistance, improving forming quality, overcoming forming defects of vibration-type seamless tee pipe cold extrusion forming die

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