Fastening device for rocket engine shell mold with large length-diameter ratio and preparation process

Abstract

The invention provides a fastening device for a rocket engine shell mold with a large length-diameter ratio. The fastening device comprises two part bodies, wherein curved grooves are arranged in vertical ribs of two adjacent part bodies; and a clamping device is movably connected to the outer surface of one side of each part body; and each clamping device comprises a pull rod, two lock catches, abolt, a pin shaft, a nut and a gasket, wherein the two lock catches are fixedly arranged on the outer surface of one side of each part body, and the two lock catches are movably connected to the pinshaft. According to the fastening device, the space required by operation can be reduced, disassembly and assembly do not need to enter the mold, the size limitation on a product during conventional bolt fastening connection is broken through, axial and radial simultaneous constraint is realized, the fastening surface is larger, the fastening effect is better, finally, the fastening mode is simple, disassembly and assembly can be realized without tools and equipment, the operation is convenient, the working hours are greatly shortened, and the assembly efficiency is improved.

Description

technical field [0001] The invention relates to the technical field of aerospace structure manufacturing, in particular to a fastening device and a preparation process for a shell mold of a rocket engine with a large length-to-diameter ratio. Background technique [0002] The aerospace industry is the most challenging and widely driven high-tech field in the world today. It is a concentrated expression and an important symbol of the country's comprehensive national strength, and it is also an important part of the country's strategic emerging industries and advanced intelligent manufacturing. [0003] At present, the world's aerospace powers already have a series of solid launch vehicles with full coverage of carrying capacity, which have the advantages of mature technology, high reliability, and mature operation. There is a big gap, and there are related technical problems in the stable preparation of raw materials, tooling design, process manufacturing, quality control, la...

AI Technical Summary

Problems solved by technology

[0004] The mandrel design of the aspect ratio shell generally adopts the form of split combination. For the rocket engine shell with a large aspect ratio, the pole hole is small and the inner cavity is long. In the conventional bolt-type fastening connection scheme, both the operator and the mechanical arm need to be connected. There is not enough access and operating space, the size of the product is limited, the fastening effect is mediocre, and the fastening method is complicated to operate, and external equipment and tools are needed, which is inconvenient for installation and operation and reduces assembly efficiency

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