Taking the manufacturing of high-pressure turbine guide for a spaceflight power system as an example

in view of the short - term problems in the manufacturing process

from the aspects of material characteristics

structural characteristics and technical requirements

the causes of the problems were analyzed. From the aspect of thermal gap control

the thermal deformation control technology of multi-degrees of freedom space structure under high temperature brazing was studied

and the actual application and verification of the research results were carried out based on the production and manufacturing of power system. And the following conclusions: through the clamping device to control the hot deformation

the pressure part closer to the welding position

the better effect; During the brazing process

after the completion of the heating phase

because of the penetration of filler metal

the two parts become one

and in the cooling stage

with the same center retracting

at this time the most gap has been filled by filler metal

so the clearance can not change; Under the condition that the cold space meets the technical requirements

the thermal expansion deformation under high temperature will lead to a large gap. The solder began to melt at about 997℃ . The flow velocity and clearance can not be controlled by heat treatment system

and the temperature change in small range is very small. A set of thermal deformation control methods suitable for the spatial structure of multi-degree of freedom is summarized.