process for the production of a turbinenschaufel and kernpaket for use in the method

摘要

Procedure for making turbine blades with internal cooling cavities linked by transverse channels consists of making ceramic cores (100) based on wax models which are fitted into a mould shell into which metal is poured. Each of the cores has end portions (100Da,100Dc;200at,200ct) that are linked to one another by tenon and mortise assemblies. The mortises are formed by machining the end portions of the central core (100) and the tenons by machining the corresponding portions of the second core. The procedure can also include the production of a third core for a third cavity in a turbine blade with cavities on both sides of its central cavity, between the central cavity and the blade's inner and outer surfaces.