A processing method of high-quality large-diameter thin-walled metal cylinder

Abstract

The invention relates to a machining method of a high-quality large-diameter thin-wall barrel body. The machining method comprises the following steps. Firstly, isothermy or hot die anti-extrusion technology is utilized, and anti-extrusion is performed on an alloy forging rod. Secondly, machining is performed on the inner and outer surfaces of a spinning barrel billet, and finish turning is performed on the inner surface of the barrel bottom of the barrel billet. Thirdly, multi-pass brute force thinning spinning is performed on the machined spinning barrel billet, and the spinning is hot spinning or cold spinning. Fourthly, intermediate heat treatment is performed on a spinning semi-finished product, and the intermediate heat treatment is annealing or solution treatment. Fifthly, the third step and the fourth step are performed repeatedly and alternatively so that finished product spinning is performed. Sixthly, scouring and cleaning are performed on the barrel body, and finished product heat treatment is performed. Seventhly, polishing of the inner and outer surfaces of the barrel body after heat treatment in the sixth step is performed, and a finished product barrel body is obtained. By adoption of the machining method of the high-quality large-diameter thin-wall barrel body to machine a large-diameter thin-wall metal barrel body without welding lines, organization is even and fine, comprehensive performance is high, the process is short, product additional values are high, and good application and popularizing prospects and certain economic and social benefits are achieved.

Description

technical field [0001] The invention relates to a processing method of a high-quality, large-diameter and thin-walled metal cylinder, belonging to the technical field of metal processing. Background technique [0002] Metal cylinders are widely used in aviation, aerospace, petroleum, chemical, electric power, nuclear energy and other industrial fields. The processing methods of large-diameter thin-walled metal cylinders mainly include ① direct forming by sheet metal coil welding, ② sheet coil welding, thinning spinning, and welding and forming at the bottom of the cylinder, ③ sheet metal stamping, thinning spinning, ④ plate ⑤Centrifugal casting tube billet, thinning spinning, tube bottom welding forming, ⑥vacuum casting tube billet, hot isostatic pressing, thinning spinning forming. The traditional plate coil welding direct forming method can be used for the processing of most metal materials, but the existence of welds reduces the overall performance of the cylinder; for h...

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Problems solved by technology

[0003] The present invention aims at the deficiencies in the above-mentioned prior art, and provides a method for preparing a high-quality, large-diameter, non-welded thin-walled metal cylinder, which has a short preparation process, labor-saving forming, energy saving, high material utilization rate, and strong applicability. The structure of the cylinder is uniform, small, and the comprehensive performance is good, which can solve many problems in the traditional processing method, such as weld seam affecting the comprehensive performance of the cylinder, long processing flow and many procedures, and difficult processing and forming.

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