A homogeneous hot spinning forming method for large-diameter high-pressure gas cylinders

Abstract

The invention discloses a homogeneous hot spinning method for large-diameter high-pressure gas cylinders, which relates to the field of high-pressure seamless gas cylinder processing, including the use of arc-shaped flaps to spin the ends of seamless steel pipes, and the arc-shaped flaps There is a cobalt-based alloy surfacing layer on the working surface of the seamless steel pipe. After heating the area within the length L of one end of the seamless steel pipe, the seamless steel pipe is clamped by the claws of the spindle of the spinning machine, and coated on the forming surface of the arc-shaped flap. Graphite milk, rotate the seamless steel pipe at a speed of 25rad / s~29rad / s. While the seamless steel pipe is rotating, the arc-shaped flap rotates 1 / 4 of a turn in the closing direction at a speed of 0.0015rad / s~0.0035rad / s Once the forming is completed, after the closed end is completely closed and formed, the arc-shaped flap is fed along the inner side of the axis of the seamless steel pipe for a length of M, and then turned 1 / 4 turn along the direction of the reverse closing, which solves the problem of hot spinning processing of high-strength steel with large diameters. The quality of the head of the seamless steel pipe is poor, and the service life of the flap is low.

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...

AI Technical Summary

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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