Composite tool for welding spray pipe jacket section of thrust chamber and welding process of composite tool

Abstract

The invention provides a composite tool for welding a spray pipe jacket section of a thrust chamber. The composite tool comprises a mandrel assembly, a jacket tire, a pressing ring assembly and a press-fitting assembly; and the mandrel assembly, the jacket tire, the pressing ring assembly and the press-fitting assembly are used in cooperation to conduct positioning, pressing and press-fitting on the inner wall and the outer wall of the spray pipe jacket section in the thrust chamber so as to assist in welding of the inner wall and the outer wall of the spray pipe jacket section in the thrust chamber. Compared with a plurality of sets of single tools needed by existing spray pipe welding, the composite tool is more complete in function, the number of the single tools can be greatly reduced, preparation procedures before welding are further reduced, the production process is simplified, and the production cost of a spray pipe is reduced.

Description

[0001] This application is a divisional application of an invention patent application with an application date of March 4, 2019, an application number of 201910159991.0, and a patent application titled "Composite Tooling for Thrust Chamber Welding and Thrust Chamber Welding Process". technical field [0002] The application belongs to the technical field of rocket engine manufacturing, and in particular relates to a composite tool for welding a nozzle jacket section of a thrust chamber and a welding process thereof. Background technique [0003] The nozzle is the part in the liquid rocket engine responsible for accelerating the expansion of the gas and obtaining the reverse thrust. In order to withstand the high temperature of the gas, the nozzle generally adopts a cooling jacket structure. When the propellant flows through hundreds of tiny channels in the nozzle structure, the heat of the gas is taken away to ensure that the metal material of the nozzle structure is not abl...

AI Technical Summary

Problems solved by technology

In the production process of the existing nozzles, these toolings each undertake their own functions and are not universal, resulting in the following problems in the manufacturing process of the nozzles: many preparation procedures before welding, complex processes, and difficult implementation , expensive equipment, long commissioning / trial production cycle, large production energy consumption, lower mechanical properties of joints than base metal, etc.

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