Multi-directional constraint rolling forming manufacturing method for integral structure of fuel storage tank

Abstract

The invention relates to a multi-directional constraint rolling forming manufacturing method for an integral structure of a fuel storage tank. The multi-directional constraint rolling forming manufacturing method comprises the following steps that S1, a final forging piece is designed; S2, a pre-forged piece is designed; S3, a prefabricated blank is designed, specifically, on the basis of the pre-forged piece designed in S2, circular ring excess materials and longitudinal flashes are removed, the inner surface of the bottom of the pre-forged piece is shifted upwards in the axial direction, a thick-wall bottom with the same thickness as a thick-wall straight cylinder is obtained, meanwhile, the upper end face of the thick-wall straight cylinder of the pre-forged piece is shifted upwards by the same distance in the axial direction, and the prefabricated blank is obtained; and S4, the multi-direction constraint rolling forming procedure of fuel storage tank barrel-fork-shaped ring-tank bottom integral structure comprises the steps that S41, the blank is prepared; S42, the prefabricated blank is formed; S43, axial rolling pre-forming is conducted; S44, longitudinal flashes and circular ring excess materials of the pre-forged piece are cut off; and S45, constraint rolling final forming is conducted. The overall plastic forming of the fuel storage tank can be achieved, the situation that the mechanical property of the fuel storage tank is weakened due to welding, bolt connection and other modes is avoided, and the high-performance fuel storage tank can be manufactured.

Description

technical field [0001] The invention relates to the technical field of fuel tank manufacturing, and more specifically, relates to a manufacturing method for multi-directional constrained roll forming of the overall structure of the fuel tank. Background technique [0002] The fuel storage tank is the core energy storage component used to store ultra-high pressure fuel required for the entire life cycle of rockets and other equipment. This component is divided into three parts: the cylinder body, the fork ring and the bottom of the tank. Features. At present, the manufacturing method of the fuel storage tank is to process the cylinder body, the fork-shaped ring and the bottom of the tank of the fuel storage tank respectively, and then splice the three parts into a whole by welding, bolt connection and other modes. The above-mentioned manufacturing method is a split-type manufacturing method. Not only is the manufacturing process complicated, the manufacturing efficiency is l...

AI Technical Summary

Problems solved by technology

At present, the continuous local plastic forming process has been widely used in the overall forming of large components with relatively simple geometric structures such as rings, shafts, and flat plates, but there is no relevant report on the continuous local plastic forming process of fuel tanks.

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