Extra-large annular forge piece forming die forging method

Abstract

The invention provides an extra-large annular forge piece forming die forging method. The extra-large annular forge piece forming die forging method comprises the following steps of steel ingot WHF method upsetting and drawing-out, blanking, blank upsetting, punching, saddle forging and forming die fixing blank inner hole spinning, a forming die is fixed to an annular blank inner hole in the finalforming process, then a forging press applies pressure to a wide anvil, stress is transmitted to a spinning anvil through the wide anvil, the spinning anvil spins in the radial direction of the annular blank to enable metal to mainly flow in the radial direction, due to the resistance effect of the forming die, under the condition that the blank height is reduced and the inner hole size is not changed, only the outer diameter size is increased, and finally forming of the ultra-large annular forge piece forming die is achieved. According to the method, the inner hole is adopted for fixing theforming die, and the spinning anvil is used for spinning the height direction of the blank, so that the flowing direction of metal is changed, the forming method of the extra-large annular forge pieceis achieved, the thought of a traditional free forging extra-large annular piece saddle forging forming method is changed, and the problem that the forging machinery of the extra-large annular forgepiece is limited is solved.

Description

technical field [0001] The invention belongs to the technical field of forging, and in particular relates to a film forging method of an extra-large annular forging piece. Background technique [0002] As a key component of heavy-duty equipment, extra-large ring forgings are directly related to the safety and reliability of the entire equipment. With the development of equipment manufacturing in the direction of heavy-duty and large-scale, the demand for extra-large ring forgings also increases. [0003] The ring forging used for a certain pressure equipment has a diameter of 7.4m and a height of 1.2m. Its tonnage is heavy and its specifications are large, which exceeds the forging limit of the existing press. Casting or dividing into several sections for bending forging and welding forming not only has high production cost, long production cycle, low production efficiency, low material utilization rate, but also incomplete metal flow line and difficult quality control. C...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a film forging method for extra-large ring forgings, so as to solve the existing problems in the preparation of extra-large ring forgings in the existing technology. The idea can realize the forging of some super large ring forgings, so as to better ensure the quality

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