Patent ID: 6210630
Filing Date: 2001-04-03
Classification: B21D,B21J,B21K,B23P,Y10T

Abstract:
A multiple-action furnace press for the hot forming of an element for use in the manufacture of a hollow turbomachine blade by a process comprising the following steps: using computer aided design and manufacturing (CAD/CAM) means to create, from a definition of said blade to be produced, a digital simulation of the flat form of the primary parts of said blade; die-forging said primary parts of said blade; machining said primary parts; depositing diffusion barriers on at least one of said primary parts according to a predefined pattern; inflating the welded assembly of said primary parts using pressurized gas and superplasticly shaping said assembly; and, final machining of said shaped assembly; wherein said process also includes a step of hot forming an element of said blade by isothermally shaping said element, said element being made of a titanium alloy of TA6V type, in a press at a temperature between 700.degree. C. and 940.degree. C. using the action of at least two stamps and a holding clamp locking said element on a shaping die while ensuring a controlled deformation rate, so as to obtain a lengthening of the fibres of said element, that is to say the elongation of different fibres of said element, with a controlled distribution of said fibres on both sides of the central fibre, said multiple-action furnace press comprising: a heating enclosure; heating means associated with said heating enclosure; a press bed structure surrounding said heating enclosure and consisting of a lower metal plate, an upper metal plate, and columns inter-connecting said lower metal plate and said upper metal plate, said columns comprising prestressed tie rods; forming equipment comprising a lower soleplate incorporating a shaping die bounded at each end by a respective notch, an upper holding clamp for holding said element on said shaping die during deformation, and at least two upper stamps; multiple actuators connected to said holding clamp and said stamps; and a power unit for driving said multiple actuators.