EP 0700738 B1 19991208 - Method of producing a hollow turbine blade
Title (en)
Method of producing a hollow turbine blade
Title (de)
Verfahren zur Herstellung einer hohlen Turbinenschaufel
Title (fr)
Procédé de fabrication d'une aube creuse de turbomachine
Publication
Application
Priority
FR 9410690 A 19940907
Abstract (en)
[origin: EP0700738A1] The method esp. for a ducted fan turbine rotor, involves simulating the assembly of the blade's components by computer aided design, forging and machining the primary components, depositing diffusion barriers in a predetermined sequence, assembling the primary components by diffusion welding under isostatic pressure, and inflating the blade with gas pressure to achieve super-plastic moulding, followed by final machining. The forging process is carried out in a hot matrix at a temperature of 0.7 to 0.8 of the melting point of the material involved, with the pressing tools heated to 80 per cent of the workpiece temperature. The blade is made from a titanium alloy, e.g. TA6V, with a workpiece matrix temperature of between 880 and 950 deg.C and a tool temperature of 600 - 850 deg.C, designed to produce a microstructure with a grain size of under 10 mcm.
IPC 1-7
IPC 8 full level
F01D 5/18 (2006.01); B21D 26/055 (2011.01); B21D 53/78 (2006.01); B21K 3/04 (2006.01); B23P 15/04 (2006.01); F01D 5/28 (2006.01)
CPC (source: EP US)
B21D 26/055 (2013.01 - EP US); B21D 53/78 (2013.01 - EP US); Y10T 29/49336 (2015.01 - EP US); Y10T 29/49339 (2015.01 - EP US)
Designated contracting state (EPC)
AT BE CH DE ES FR GB IT LI SE
DOCDB simple family (publication)
EP 0700738 A1 19960313; EP 0700738 B1 19991208; AT E187370 T1 19991215; CA 2157643 A1 19960308; CA 2157643 C 20041123; DE 69513754 D1 20000113; DE 69513754 T2 20000629; ES 2139860 T3 20000216; FR 2724127 A1 19960308; FR 2724127 B1 19961220; IL 115123 A0 19951231; IL 115123 A 19991130; JP 3305927 B2 20020724; JP H08189303 A 19960723; US 5636440 A 19970610
DOCDB simple family (application)
EP 95402012 A 19950906; AT 95402012 T 19950906; CA 2157643 A 19950906; DE 69513754 T 19950906; ES 95402012 T 19950906; FR 9410690 A 19940907; IL 11512395 A 19950901; JP 23032695 A 19950907; US 52158395 A 19950830