Homogenization hot spinning forming method for large-diameter high-pressure gas cylinder

Abstract

The invention discloses a homogenization hot spinning forming method for a large-diameter high-pressure gas cylinder, and relates to the field of high-pressure-bearing seamless gas cylinder machining.The homogenization hot spinning forming method comprises the steps that an arc-shaped turning plate is used for spinning the end of a seamless steel pipe, and a cobalt-based alloy surfacing layer is arranged on the working face of the arc-shaped turning plate; after an area within the range of the length L of one end of the seamless steel pipe is heated, a spindle clamping jaw of a spinning machine is used for clamping the seamless steel pipe, the forming face of an arc-shaped turning plate is coated with aquadag, the seamless steel pipe is rotated at the rotating speed of 25 rad / s-29 rad / s, when the seamless steel pipe rotates, the arc-shaped turning plate rotates by 1 / 4 circle in the closing-in direction at the rotating speed of 0.0015 rad / s-0. 0035 rad / s, and then one-time forming is completed; and after the closed end is completely closed and formed, the arc-shaped turning plate is fed by the length M along the inner side of the axis of the seamless steel pipe and then is turned over by 1 / 4 circle in the reverse closing direction, so that the problems that the forming quality of the sealing head of the high-strength steel large-diameter seamless steel pipe processed through hot spinning is poor, and the service life of the turning plate is short are solved.

Description

technical field [0001] The invention belongs to the technical field of high-pressure seamless gas cylinder processing, and in particular relates to a large-diameter high-pressure gas cylinder homogeneous hot spinning forming method. Background technique [0002] Gas storage cylinders can be used to refill compressed gases such as air and nitrogen, and are mainly used in hydraulic systems of surface ships, salvage and lifesaving systems, and shore-based air systems. With the development of my country's weapons and equipment for the deep sea, the requirements for the pressure bearing capacity of gas cylinders are further increased, and gas cylinders with large volume, large diameter and large pressure bearing capacity are required. However, the stress on the head of the existing high-pressure gas cylinder is complicated, and the existing manufacturing process makes the head part have a large stress concentration, which greatly reduces the service life of the gas cylinder and r...

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Problems solved by technology

[0006] The purpose of the present invention is to address the above-mentioned deficiencies in the prior art, to provide a homogeneous hot spinning forming method for large-diameter high-pressure gas cylinders, to solve or improve the existence of sealing heads of high-strength steel large-diameter seamless steel pipes processed by hot spinning. The flap is easy to stick to the seamless steel pipe anyway, resulting in poor molding quality

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