Head driving process of hammer head of hot rolling pierced billet

Abstract

The invention discloses a head driving process of a hammer head of a hot rolling pierced billet, comprising the following steps of: firstly computing the radial sectional area of the hot rolling pierced billet; then arranging a head driving mould, wherein the middle of the bottom surface of the head driving mould is of a rectangle shape, both sides of the rectangle are of arc shapes, the filling rate of the hot rolling pierced billet in a cavity of the head making mould is bound to be higher than 75 percent and small than 90 percent, and the filling rate is the ratio of the radial cross sectional area of the hot rolling pierced billet to the bottom surface area of the head driving mould; and finally inserting the end part of the hot rolling pierced billet into the cavity of the head driving mould for punching to form the hammer head of the hot rolling pierced billet. The head driving process has the advantages of simple step, convenience for operation, once forming, low labor intensity of workers and effective enhancement of production efficiency; a through hole can be directly formed when the hammer head is punched by adopting the head driving process, and then a hole does not need to be punched again, therefore, the strength of the hammer head can be enhanced and a steel pipe is prevented from being drawn to be broken in the drawing process.

Description

technical field [0001] The invention relates to a technology for heading a steel pipe, in particular to a technology for heading a hot-rolled waste pipe with a hammer head. Background technique [0002] Hammerheading at the end of the hot-rolled waste pipe is an indispensable and important process in the steel pipe production process. Its purpose is to prepare for the cold drawing of the steel pipe and realize the cold drawing smoothly. The traditional hammer-heading process is realized in three steps by using a "W"-shaped mold. The first step: press the front end of the steel pipe into a "W" shape; the second step: turn the steel pipe 90°, put it in another hole of the mold and press it into a circle; the third step: move to another hole of the mold, Punch holes at the transition between the hammer head and the steel pipe. The purpose of punching is to facilitate the discharge of gas in the pipe during pickling of the steel pipe so that the acid liquid can fill the steel ...

AI Technical Summary

Problems solved by technology

[0003] The traditional hammerheading process is relatively complicated. Every time the hammerheading is performed, the steel pipe needs to be transported several times. The labor intensity of the workers is very high, and the production efficiency is relatively low. The punched steel pipe is easy to break when cold drawing

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