MANUFACTURING METHOD FOR REGENERATIVE COOLING THRUST CHAMBER NOZZLE

摘要

A method for manufacturing a regenerative cooling nozzle is provided to protect a nozzle expansion portion from deformation by performing bulging processes through multiple stages. A method for manufacturing a regenerative cooling nozzle includes a first step(S1) of forging a material for manufacturing an inner structure of the nozzle, a second step(S2) of performing heat treatment onto the forged material and furnace cooling, a third step(S3) of inspecting the organism of the material, a fourth step(S4) of manufacturing an inner structure having an outer surface with a cooling channel by using the inspected material, a fifth step(S5) of bulging one end of the inner structure, and a sixth step(S6) of brazing the inner structure and an outer structure of the nozzle and performing a process for ease of welding. The heat treatment is performed for 20 to 30 minutes at the temperature of 800 to 1030 deg.C. In the fourth step, the inner structure has an outer surface with a plurality of channel ribs for formation of a cooling channel. In the fifth step, a plurality of tapered bulging jigs are sequentially introduced into one end of the inner structure for bulging in accordance with the tapered degree of the bulging jigs.