Conformal Forging Forming Technology of Hemispherical Head

Abstract

The invention provides a hemispherical head conformal forging forming process. It is forged into a cylindrical body through billeting, upsetting, elongating, punching, and then a tapered cylindrical body after adjusting the pressure angle and strength of the upper anvil with a horse frame and a mandrel. Preheat the upper and lower molds at 300-400°C, heat the cone-shaped cylinder at 1150-1200°C, then place the lower mold on the movable platform of the press, lift the cone-shaped cylinder with a mandrel and place it on the bottom Then the upper mold and the lower mold are clamped, and the mandrel is continuously rotated by the manipulator to drive the conical cylinder to rotate, and the hemispherical head is forged according to the shape by using the clamping space of the upper mold and the lower mold. After the shaped head is cooled, it is heat-treated at 600-950°C and cut with a small margin of metal to form a hemispherical head. Forged hemispherical head, its fiber direction is distributed according to the shape, safe and reliable, with high temperature, high pressure and corrosion resistance, and small machining allowance, material saving, short processing cycle and low manufacturing cost.

Description

technical field [0001] The invention belongs to the technical field of forging and pressing, and in particular relates to a hemispherical head forging forming process. Background technique [0002] The head, usually used to connect with the pressure vessel, is a part of the pressure boundary, which has high requirements for high temperature, high pressure and corrosion resistance. When manufactured by the traditional process method, it is usually first forged into a cylindrical part, and then machined to remove excess metal. The metal fiber direction of the head made by this process is cut off, which not only reduces the comprehensive mechanical properties and service life, but also reduces the ability to resist high temperature, high pressure and corrosion. Due to the large amount of cutting of the forged cylinder, The material utilization rate is low, the processing cycle is long, and the manufacturing cost is high. Contents of the invention [0003] The purpose of the...

AI Technical Summary

Problems solved by technology

The metal fiber direction of the head made by this process is cut off, which not only reduces the comprehensive mechanical properties and service life, but also reduces the ability to resist high temperature, high pressure and corrosion. Due to the large amount of cutting of the forged cylinder, Low material utilization rate, long processing cycle and high manufacturing cost

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