Ring rolling forming process of square-exterior circular-interior forge piece

Abstract

The invention provides a ring rolling forming process of a square-exterior circular-interior forge piece. The ring rolling forming process comprises the following steps that a square-exterior circular-interior mould which is preheated to 300-400 DEG C is sleeved on a core roller of a numerical control ring rolling machine; a manufactured circular-exterior circular-interior blank is arranged in the square-exterior circular-interior mould; the numerical control ring rolling machine is started to position the square-exterior circular-interior mould and the circular-exterior circular-interio blank so that the wall thickness of the square-exterior circular-interior forge piece is reduced to a predetermined size finally, and the work automatically stops; the numerical control grinding ring machine stops and the square-exterior circular-interior forge piece is taken out; after the square-exterior circular-interior forge piece is subjected to a normalizing heat treatment of 880-920 DEG C for carrying out mechanical machining after being cooled, so that a square-exterior circular-interior part is obtained. A metal flow line of the forge piece is not cut off, and the forge piece has the advantages of uniform structure, grain refinement, strong comprehensiveness, high forge piece quality, less cutting quantity of mechanical machining operation, material saving, high production efficiency, and long service life.

Description

Technical field [0001] The invention belongs to the technical field of forging, and particularly relates to a ring-rolling forming process of an outer square inner circular forging. Background technique [0002] The outer and inner circular forgings have an outer and inner circular shape. There are two conventional forging methods. One is to forge the blank into an outer circle and an inner circle, and then process it into outer square and inner circular parts by mechanical processing; the other is to forge the blank After being made into a square shape, it is finally processed into a round part outside and inside by mechanical processing. [0003] The two methods mentioned are both consumables, and because of the long machining time, the work efficiency is low. During machining, the metal flow lines of the materials are all cut off, thereby reducing the overall performance and use of the outer and inner circular parts. life. Summary of the invention [0004] The purpose of the p...

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Problems solved by technology

[0003] The two methods described are not only consumable, but also because of the long machining time and low work efficiency. During machining, the metal flow lines of the material are all cut off, thereby reducing the comprehensive performance and use of the outer and inner circular parts. life

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