Geometrical construction process for a flash land for the forging of a complex part

摘要

The invention concerns a geometrical construction process for a flash land, to be provided in a die for the forging of a turbomachine vane, in accordance with determined parameters (l, d, ε, α, h), where the vane has a blade and the blade is defined by plane sections (Si) in predetermined planes (Pi), where the flash land and its flash gutter must be defined in the said predetermined planes so as to obtain plane sections of the blade and of the flash land. The process is characterised by the fact that: one chooses at least three reference sections (Sa, Sb & Sc) of the blade in reference planes (Pa, Pb, Pc) corresponding to the root, middle and tip of the blade, in the said reference planes (Pa, Pb, Pc), one chooses at least three reference sections of the blade in reference planes corresponding to the root, middle and tip of the blade, in the said reference planes (Pa, Pb, Pc), one determines length λ of the flash land and a shrinkage distance d for the three reference sections, in the said predetermined planes, one constructs, by interpolation, the intermediate sections of the flash land and the flash gutter from the said reference sections.