EP 0824981 B1 20010502 - Process for manufacturing a hollow turbine blade and device used for on-going hot twisting
Title (en)
Process for manufacturing a hollow turbine blade and device used for on-going hot twisting
Title (de)
Verfahren zur Herstellung einer hohlen Turbinschaufel und Anlage zum laufenden Warmverwinden
Title (fr)
Procédé de fabrication d'une aube creuse de turbomachine et équipement de vrillage évolutif à chaud utilisé
Publication
Application
Priority
FR 9610352 A 19960822
Abstract (en)
[origin: EP0824981A1] The procedure consists of forging, machining and welding components made by a computer-aided system, followed by inflation under pressure and superplastic moulding. The required twist in the blade, made from a titanium alloy such as TA6V, is produced by heating the blade to 700 deg C and applying a torsion to it through rotary bars (5) acting on yokes previously attached to the blade. The twisting process can be applied to the individual components of the blade or to assembled blades and uses a cylindrical electric furnace (2) with slits (24) for the bars. The furnace is surrounded by a circular frame (6), and jaws (3, 4) hold the two ends of the blade while it is being twisted.
IPC 1-7
IPC 8 full level
B21D 11/14 (2006.01); B21D 53/78 (2006.01); C22F 1/00 (2006.01); C22F 1/18 (2006.01); F01D 5/18 (2006.01); F01D 5/28 (2006.01); F02C 7/00 (2006.01)
CPC (source: EP US)
B21D 11/14 (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)
DE FR GB IT
DOCDB simple family (publication)
EP 0824981 A1 19980225; EP 0824981 B1 20010502; DE 69704690 D1 20010607; DE 69704690 T2 20011129; FR 2752539 A1 19980227; FR 2752539 B1 19980918; JP 3477043 B2 20031210; JP H1089008 A 19980407; US 5933952 A 19990810; US 6242715 B1 20010605
DOCDB simple family (application)
EP 97401954 A 19970820; DE 69704690 T 19970820; FR 9610352 A 19960822; JP 22638097 A 19970822; US 29099699 A 19990414; US 91418697 A 19970819