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Mathieu Philippe Albert Bichon

Alain Georges Henri Lorieux

Jean-Pierre SErges Bergue

Bernard Armand Ren&eacute; Costeplane

Jean-Fran&ccedil;ois Georges Julien Lacuisse

An apparatus for manufacturing a hollow turbomachine blade made from a titanium alloy of the TA6V type includes a hot twisting step in which an element of the blade is twisted progressively at a temperature above 700&deg; C. by a plurality of bars which are rotated about the twist axis and act on collars previously fixed to the element, the distribution and number of collars being determined according to the desired twist to be imparted and such as to obtain a linear twist development between each collar.

Progressive hot twisting apparatus for use in a process for manufacturing a hollow turbomachine blade

A process for manufacturing a hollow turbomachine blade made from a type TA6V titanium alloy includes a hot forming step in which an element of the blade is isothermally shaped in a press at a temperature between 700&deg; C. and 940&deg; C. under the action of at least two stamps and a holding-clamp which press the blade element on a shaping die, while ensuring a controlled deformation rate so as to obtain a lengthening of the fibers, that is to say the elongation of the different fibers of the element, with a controlled distribution on both sides of the central fiber. A multiple-action furnace-press designed for carrying out the process is also described.

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Ermont, France

Mathieu Philippe Albert Bichon