Manufacturing method of floor-type pre-cooler

Abstract

The invention discloses a manufacturing method of a floor-type pre-cooler. The manufacturing method of the floor-type pre-cooler comprises the steps that a plurality of straight tiny pipes are arranged in a forming mold and are formed into spiral tiny pipes through vacuum heating; the tiny pipes penetrate through the two ends of holes formed in a gasket side by side to be assembled on the gasket;the two ends of each tiny pipe are separately inserted into installation holes in the side edge of a gas collection pipe, pasty solder is smeared on the joints, and then the tiny pipes are transferredinto a vacuum furnace to be subjected to vacuum soldering, so that membranes are formed; after vacuum soldering is completed, a support lug is arranged on the gas collection pipe in a sleeving mode and is welded on the gas collection pipe through argon arc welding, so that the pre-cooler is formed. The manufacturing method of the floor-type pre-cooler has the beneficial effects that a gap betweenthe gas collection pipe and a to-be-welded part of a pipeline is controlled within 0.02 by accurately setting soldering parameters and strictly controlling solder consumption, soldering of the tiny pipes with the wall thickness of 0.05mm is achieved, and corrosion is unlikely to occur.

Description

technical field [0001] The invention belongs to the technical field of manufacturing aerospace components, and in particular relates to a preparation method of a ground test precooler. Background technique [0002] The ground test precooler belongs to a new type of power cooling part of the spacecraft, which is mainly used to cool the hot air of the engine; the existing defects of the ground test precooler are: because the pipe diameter is small, the wall thickness is thin, and the high temperature brazing Diaphragm brazing is easy to dissolve; straight pipes are not easy to assemble, and the spiral shape of the pipeline after brazing is not easy to ensure and easy to deform; gaskets are not easy to assemble and fix, and the lugs and gas collecting pipes are connected by argon arc welding. If the distance is too close, the pipeline may be damaged, resulting in the scrapping of parts; both ends of the diaphragm gas collector must be welded by argon arc welding. tubes, and it...

AI Technical Summary

Problems solved by technology

[0002] The ground test precooler belongs to a new type of power cooling part of the spacecraft, which is mainly used to cool the hot air of the engine; the existing defects of the ground test precooler are: because the pipe diameter is small, the wall thickness is thin, and the high temperature brazing Diaphragm brazing is easy to dissolve; straight pipes are not easy to assemble, and the spiral shape of the pipeline after brazing is not easy to ensure and easy to deform; gaskets are not easy to assemble and fix, and the lugs and gas collecting pipes are connected by argon arc welding. If the distance is too close, the pipeline may be damaged, resulting in the scrapping of parts; both ends of the diaphragm gas collector must be welded by argon arc welding. tubes, and it is easy to damage the micro tubes during argon arc welding.

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