Processing

Please wait...

PATENTSCOPE will be unavailable a few hours for maintenance reason on Saturday 31.10.2020 at 7:00 AM CET
Settings

Settings

Goto Application

1. WO1996003247 - WIRE ELECTRIC DISCHARGE MACHINING METHOD

Publication Number WO/1996/003247
Publication Date 08.02.1996
International Application No. PCT/JP1995/001477
International Filing Date 25.07.1995
IPC
B23H 7/06 2006.01
BPERFORMING OPERATIONS; TRANSPORTING
23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
HWORKING 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
7Processes or apparatus applicable to both electrical discharge machining and electrochemical machining
02Wire-cutting
06Control of the travel curve of the relative movement between electrode and workpiece
CPC
B23H 7/065
BPERFORMING OPERATIONS; TRANSPORTING
23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
HWORKING 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
7Processes or apparatus applicable to both electrical discharge machining and electrochemical machining
02Wire-cutting
06Control of the travel curve of the relative movement between electrode and workpiece
065Electric circuits specially adapted therefor
Applicants
  • FANUC LTD [JP]/[JP] (AllExceptUS)
  • KAMIGUCHI, Masao [JP]/[JP] (UsOnly)
  • ITO, Masaya [JP]/[JP] (UsOnly)
  • OGATA, Toshiyuki [JP]/[JP] (UsOnly)
Inventors
  • KAMIGUCHI, Masao
  • ITO, Masaya
  • OGATA, Toshiyuki
Agents
  • TAKEMOTO, Shoji
Priority Data
6/19382527.07.1994JP
Publication Language Japanese (JA)
Filing Language Japanese (JA)
Designated States
Title
(EN) WIRE ELECTRIC DISCHARGE MACHINING METHOD
(FR) PROCEDE D'USINAGE PAR FIL A DECHARGE ELECTRIQUE
Abstract
(EN)
A wire electric discharge machining method for improving a machining precision when machining a corner portion. A speed is gradually reduced starting at point A until the machining of a corner portion C-D is initiated, and machining is performed on the corner portion C-D at a constant feed speed. Then, the machining feed speed is gradually increased starting at point D where the machining of the corner portion has been completed until the original speed is restored at point F. In accordance with this change in feed speed, the off-time of a voltage applied between a wire and a work is increased starting at point B, reduced starting at point E after the machining of the corner portion is completed, and restored to the original level at point F. Furthermore, the flow rate of processing liquid is also reduced with the progress of machining of the corner portion. This process is controlled in accordance with the radius curvature of the corner portion by automatically changing a feed speed along the corner portion, off-time and flow rate of processing liquid. There is little deflection of the wire electrode at the start and during the machining of the corner portion, whereby the precision with which corner portion is machined is improved.
(FR)
Procédé d'usinage par fil de décharge électrique améliorant la précision d'usinage d'une portion cornière. La vitesse est progressivement réduite en partant du point A jusqu'à ce que commence l'usinage de la partie cornière C-D qui s'effectue à vitesse constante, puis la vitesse d'alimentation de la machine croit progressivement en partant du point D où se termine l'usinage de la portion cornière pour reprendre la vitesse originale en F. En conséquence de ces variations de la vitesse d'alimentation, les temps morts de la tension appliquée entre le fil et la pièce croissent à partir du point B, décroissent à partir du point E, après la fin de l'usinage de la portion cornière, puis retrouvent leur niveau original en F. De plus, le débit du liquide d'usinage se trouve réduit pendant l'usinage de la portion cornière. Le processus se règle en fonction de la courbure du coin par adaptation automatique de la vitesse d'alimentation le long de la portion cornière, des temps morts et du débit du liquide d'usinage. L'électrode-fil ne présente qu'une faible déflexion au départ et pendant l'usinage de la portion cornière, d'où une plus grande précision dans l'usinage de cette dernière.
Also published as
Latest bibliographic data on file with the International Bureau