Verfahren zur Herstellung einer hohlen Turbinenschaufel und mehrstufiger Druckofen zur Durchführung des Verfahrens

摘要

A procedure for manufacturing a hollow turbine blade, especially a large-chord fan rotor blade, uses computer-assisted design to simulate the components of the blade, followed by forging and machining the primary components, depositing diffusion barriers, assembling and inflating. The procedure also includes an operation for isothermic shaping of the titanium alloy blank (9) under pressure and at a temperature of 700 - 940 degrees C. The operation uses two or more dies (46), a blank holder (45) and a matrix (21), ensuring a controlled deformation speed so that the fibres of the material are distributed evenly on either side of its lengthwise axis.