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Snecma

Snecma Moteurs

Alain Georges Henri Lorieux

Mathieu Philippe Albert Bichon

Jean-Michel Patrick Maurice Franchet

Michel Breton

Jean-Pierre Bergue

Philippe Francois Christian Sagot

Jean-Pierre SErges Bergue

Alain Bourgeois

Jean-Fran&ccedil;ois Georges Julien Lacuisse

Patrick Aubry

Bernard Armand Ren&eacute; Costeplane

In a method for manufacturing a hollow blade for a turbomachine, the blade is made from a preform derived from external primary parts. Each primary part comprising a root part is formed by flattening a blank cut out from a ring with a large diameter provided with a protuberance, in order to reduce costs.

Method for manufacturing constituents of a hollow blade by rolling

The press of the invention includes a first component and a second component for holding and pressing a workpiece to be processed between them, the first component being driven into translation relatively to the second component by an air cylinder. Thus, the first component is floatably mounted relatively to the second component, said components comprising means for positioning them relatively to each other at the limit of travel. Proper centering of the workpiece between the components, without stresses, may thereby be provided.

Press for holding and pressing a workpiece

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.

Process for manufacturing a hollow turbomachine blade and a multiple-action furnace press for use in said process

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Sannois, France

Alain Georges Henri Lorieux