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:
Oct. 22, 2002
Filed:
Mar. 06, 2001
Michael J Wallis, Nelson, GB;
Rolls-Royce plc, London, GB;
Abstract
A method of manufacturing a gas turbine engine fan blade ( ) comprises forming three metal workpieces ( ). The metal workpieces ( ) are assembled into a stack ( ) so that the flat surfaces ( ) are in mating abutment. Heat and pressure is applied across the thickness of the metal workpieces ( ) to diffusion bond the metal workpieces ( ) together to form an integral structure ( ). The integral structure ( ) is upset forged at one end ( ) to produce an increase in thickness ( ) for forming the blade root ( ). The upset forged integral structure ( ) is then hot creep formed and superplastically formed to produce the required aerofoil shape and the thickened end ( ) is machined to form the blade root ( ). The method enables thinner metallic workpieces with better microstructure to be used and increases the yield of metallic workpieces.