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1. (WO1987003522) PROCESS FOR THE FORMATION OF HOLES
Latest bibliographic data on file with the International Bureau

Pub. No.: WO/1987/003522 International Application No.: PCT/GB1986/000751
Publication Date: 18.06.1987 International Filing Date: 09.12.1986
IPC:
B23B 5/36 (2006.01) ,B23H 9/14 (2006.01)
B PERFORMING OPERATIONS; TRANSPORTING
23
MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
B
TURNING; BORING
5
Turning-machines or devices specially adapted for particular work; Accessories specially adapted therefor
36
for turning specially-shaped surfaces by making use of relative movement of the tool and work produced by geometrical mechanisms, i.e. forming-lathes
B PERFORMING OPERATIONS; TRANSPORTING
23
MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
H
WORKING OF METAL BY THE ACTION OF A HIGH CONCENTRATION OF ELECTRIC CURRENT ON A WORKPIECE USING AN ELECTRODE WHICH TAKES THE PLACE OF A TOOL; SUCH WORKING COMBINED WITH OTHER FORMS OF WORKING OF METAL
9
Machining specially adapted for treating particular metal objects or for obtaining special effects or results on metal objects
14
Making holes
Applicants:
AE PLC [GB/GB]; Cawston House Cawston Rugby Warwickshire CV22 7SB, GB (AllExceptUS)
JOHNS, Antony [GB/GB]; GB (UsOnly)
Inventors:
JOHNS, Antony; GB
Agent:
GODDARD, David, John; Group Patents Department AE plc Cawston House Cawston, Rugby Warwickshire CV22 7SB, GB
Priority Data:
853077313.12.1985GB
Title (EN) PROCESS FOR THE FORMATION OF HOLES
(FR) PROCEDE DE FORMATION DE TROUS
Abstract:
(EN) A process for the production of holes (30) having curvilinear paths in engineering components. The process comprises the steps of producing relative motion along a curvilinear path between a workpiece (28) in which it is desired to form a curved hole (30) and a drill bit wherein the drill bit comprises a curved delivery tube (13) of an ECM apparatus, the curved tube (13) passing through an aperture (26) in a guidance member (27) which is positioned adjacent the workpiece (28), the aperture length being less than the diameter of the tube. An example is described of the production of curved holes in a gas turbine engine blade.
(FR) Procédé de production de trous (30) présentant des cheminements curvilignes dans des composants mécaniques. Le procédé consiste à produire un mouvement relatif le long d'un cheminement curviligne entre une pièce à usiner (28) dans laquelle on désire former un trou courbe (30) et un foret comprenant un tube d'amenée courbe (13) d'un dispositif d'usinage électrochimique (ECM), le tube courbe (13) traversant une ouverture (26) dans un organe de guidage (27) situé à proximité de la pièce à usiner (28), la longueur de l'ouverture étant inférieure au diamètre du tube. Est décrit un exemple d'exécution de trous courbes dans une aube de turbine d'un moteur à turbine à gaz.
Designated States: US
European Patent Office (AT, BE, CH, DE, FR, GB, IT, LU, NL, SE)
Publication Language: English (EN)
Filing Language: English (EN)
Also published as:
EP0248068US4769118