Integral forging method of variable-wall-thickness thick-wall end socket of high flange

Abstract

The invention discloses an integral forging method of a variable-wall-thickness thick-wall end socket of a high flange. The method comprises the following steps that shape sizes of forging blanks andforging molds are determined through calculation according to relevant data of the target end socket, corresponding molds are manufactured, after steel ingots are heated to a forging temperature, thesteel ingots are subjected to upsetting and drawing to obtain cylindrical blanks conforming to calculation, the cylindrical blanks are put into a set concave die and a cylindrical die, and are subjected to upsetting and deforming to a set height by using a circular flat plate, after the upset blanks are heated again, the blanks are put back into the concave die and the cylindrical die, a rotary punching head is used for carrying out punching deformation on the blanks, the punched blanks are re-heated and are put back into the concave die and the cylindrical die, an annular inner pressing ringand an annular outer pressing ring are used for compressing and deforming upper end metal of the extruded blanks to a set height, and therefore the required size of a forged piece is met. According tothe integral method, in-mold forming is adopted, and the obtained forged piece is regular in shape and good in performance; and the method is short in technological process, does not have special requirements on forging devices, and is convenient to popularize and apply.

Description

technical field [0001] The invention belongs to the technical field of forging and forming of thick-walled heads, and relates to an integral forging method of thick-walled heads with high flanges and variable wall thickness. Background technique [0002] At present, there are mainly two methods for the overall forging of large-scale high-flange thick-walled heads at home and abroad. One is to directly form the preform by hot drawing; the other is to use the rotation of the mold to partially load the steel ingot and gradually form it. [0003] These two forging methods have their own advantages and disadvantages: when hot drawing is formed, it is first necessary to design and manufacture (free forging + machining) a preform with a specific shape and size (high flange feature), and then use a mold to hot-draw the preform Deep form the head. Although this method can directly form the spherical part of the head, it needs to accurately design and distribute the wall thickness of...

AI Technical Summary

Problems solved by technology

This method is formed by local loading. Although the load can be reduced to a certain extent, the process is lengthy and the number of fires is too high, which is not conducive to the fine and uniform grain structure.

Moreover, the non-uniform deformation caused by local loading will also cause additional stress inside the billet, and there is a risk of damage and cracking

At the same time, this method can only be completed on forging equipment with a rotary table

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