The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 27, 1999
Filed:
Oct. 16, 1997
Gilles Michel Calle, Chelles, FR;
Gilles Charles Klein, Mery/Oise, FR;
Abstract
In a method of manufacturing a hollow blade for a turbomachine in which a plurality of primary sheet-like parts having anti-diffusion coatings in predefined areas are assembled face to face and diffusion welded together before being deformed to shape by pressurized gas and superplastic forming. The assembly, before being diffusion welded together, is subjected to a preheating treatment in an oven to remove the binder from the anti-diffusion coatings, and then, without moving the assembly, the interior of the assembly is evacuated while simultaneously progressively increasing the temperature at a rate V to a value T to produce a permanent plastic deformation of the parts, the interior of the assembly then being maintained in vacuo at the temperature T while an isostatic pressure is applied to the exterior of the assembly so as to produce a compacting of the anti-diffusion material and a prewelding of the facing areas which are not coated with the anti-diffusion material.