Manufacturing method for multi-directional restraint rolling forming of integral structure of fuel tank

Abstract

The invention relates to a manufacturing method for multi-directional constrained rolling forming of an integral structure of a fuel tank, comprising the following steps: S1, final forging design; S2, pre-forging design; S3, preform design: on the basis of the pre-forging designed in S2 , remove the ring residual material and longitudinal flash, and offset the inner surface of the bottom of the pre-forging box in the axial direction to obtain a thick-walled box bottom with the same thickness as the thick-walled straight cylinder. Offset the same distance to obtain the preform; S4, the multi-directional restraint rolling forming process of the fuel tank cylinder body-fork ring-box bottom overall structure is: S41, preparing the blank; S42, forming the preform; S43, axial rolling Pre-forming: S44, the longitudinal flash of the pre-forging and the residual material of the ring are removed; S45, the final forming by restraint rolling. The invention can realize the integral plastic forming of the fuel storage tank, avoid the weakening of the mechanical properties of the fuel storage tank caused by welding, bolt connection and the like, and can manufacture a high-performance fuel storage tank.

Description

technical field [0001] The present invention relates to the technical field of fuel tank manufacturing, and more particularly, to a manufacturing method for multi-directional restraint rolling forming of an integral structure of a fuel tank. Background technique [0002] The fuel storage tank is the core energy storage component used to store the 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 tank is as follows: firstly, the cylinder body, the fork ring and the bottom of the fuel tank are separately processed, and then the three parts are spliced ​​into a whole by welding and bolting. The above-mentioned manufacturing method is a split-type manufacturing method. Not only is the manufacturing process complicated, the manufacturing efficiency is low, and the material and...

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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