Abstract: 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.

Abstract: The invention relates to an upsetting method for working a metal slug having a determined slenderness, characterized by the fact that the slug is at least partly positioned in the direction of its length, in an upsetting pot in a cylindrical housing provided for this purpose, and pressure is exerted on the slug in the direction of its length by means of a punch, until the slug fills the whole section of the housing, so as to reduce its slenderness, and to obtain a cylindrical slug with a section equal to that of the housing, in preparation for a forging operation. By this method, it is possible to upset slugs with large slenderness.

Abstract: This present invention concerns a process for the heating of a forging machine tool, including an insert holder and an insert with one free face bearing a forging impression, in preparation for a forging operation in the said forging machine. The process is characterised by the fact that the insert holder includes a furnace element that has at least one burner and one flue for removal of the gases, forming, with the said face of the insert, a closed heating chamber, the said chamber being heated until the insert reaches a given temperature, when the furnace element is removed. The invention also covers the forging tool, including an insert with an impression, mounted in an insert holder, for implementation of the process, and a removable furnace element.

Abstract: 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° C. and 940° 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.

Abstract: 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.degree. C. and 940.degree. 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 fibres, that is to say the elongation of the different fibres of the element, with a controlled distribution on both sides of the central fibre. A multiple-action furnace-press designed for carrying out the process is also described.