EP 0290773 B1 19910522 - METHOD FOR MANUFACTURING SECTIONS BY GRINDING, AND TURBINE BLADES SO MANUFACTURED
Title (en)
METHOD FOR MANUFACTURING SECTIONS BY GRINDING, AND TURBINE BLADES SO MANUFACTURED
Publication
Application
Priority
DE 3714805 A 19870504
Abstract (en)
[origin: EP0290773A1] A grinding method for profiled parts, in particular turbine blades, blades manufactured accordingly and also typical associated intermediate products. In order to reduce the number of operations during manufacture and to make possible efficient production, the contours of base (2), head (3) and convex suction side (4) of a turbine blade are manufactured by deep grinding in one clamping set-up. A blank suitable for this machining has at its ends residual pieces (8, 9) which are used for the clamping and are cut off later. The entire blade contour with the exception of the pressure side is manufactured by rotation and translation of the blank relative to a rapidly rotating grinding wheel. In order to ensure an efficient grinding operation, the volume of metal removed per unit of time follows a predeterminable function during the pre-forming, which function can also be constant if need be. This possibly location-dependent and/or time-dependent function of the volume of metal removed per unit of time takes into account the heat dissipation in the workpiece in the vicinity of the respective grinding point in order to avoid thermal stresses in the surface layer. Finally, the final contour and surface finish is obtained during finish-grinding in the same clamping set-up. <IMAGE>
IPC 1-7
IPC 8 full level
B23P 15/02 (2006.01); B24B 19/14 (2006.01); B24B 49/00 (2006.01); F01D 5/14 (2006.01); F04D 29/38 (2006.01)
CPC (source: EP US)
B24B 19/14 (2013.01 - EP US); B24B 49/00 (2013.01 - EP US); F05B 2200/31 (2013.01 - EP US); Y10T 29/49316 (2015.01 - EP US)
Designated contracting state (EPC)
AT CH DE FR GB IT LI NL SE
DOCDB simple family (publication)
EP 0290773 A1 19881117; EP 0290773 B1 19910522; AT E63709 T1 19910615; DE 3862891 D1 19910627; JP S63288631 A 19881125; US 5205081 A 19930427; US 5330326 A 19940719
DOCDB simple family (application)
EP 88105239 A 19880331; AT 88105239 T 19880331; DE 3862891 T 19880331; JP 10747788 A 19880427; US 1121793 A 19930129; US 18976488 A 19880503