A kind of forging mold and forging method

Abstract

The invention provides a forging die which comprises an upper die and a lower die which are matched with each other. The lower die is provided with a lower die cavity, the draft angle of the side wall of the lower die cavity is zero degree to three degrees, and the concaved circular bead of the bottom of the lower die cavity is R50 mm-R100 mm; the upper die is provided with an upper die cavity and a boss, the draft angle of the side wall of the upper die cavity is 0.5 degree to 3 degrees, the convex circular bead of the bottom of the boss is R80 mm-R150 mm, and the slant angle of the bottom of the boss is 10 degrees to 15 degrees. The invention further provides a forging method by using the forging die. The forging die has a small draft angle, the margin of produced forged pieces is small, the use ratio of materials can be effectively improved, the integrality of the metal streamline of the forged pieces is guaranteed, the organization mechanical properties of the forged pieces are promoted, the needed pressure in forging is small, and the forging period of the forged pieces is effectively shortened. According to the forging method, the large-scale deep-cylinder-shaped forged pieces can be produced conveniently and quickly on forging equipment with small pressure.

Description

technical field [0001] The invention belongs to the technical field of forging, and in particular relates to a forging die and a forging method. Background technique [0002] In the prior art, the forging of large deep cylindrical forgings is usually produced by free forging or traditional die forging. However, the forgings produced by free forging have low material utilization rate, poor heat treatment hardenability, basically cut off the metal flow line, and the mechanical properties and uniformity of the structure cannot be guaranteed. Traditional die forging methods include upsetting, punching, die forging and other processes. Forgings produced by traditional die forging methods must have punching core materials, and because the inner and outer walls of forgings have a large draft angle, the forging allowance Large, so there is also the problem of low material utilization; in addition, the metal flow line will be cut off during the process of machining forgings, the pro...

AI Technical Summary

Problems solved by technology

[0003] The first object of the present invention is to provide a forging die to solve the problems of low material utilization rate, cut-off of metal flow line, poor mechanical properties, cumbersome process and low production efficiency in the forging process of deep cylindrical forgings in the prior art. And other issues

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