Wire-cut electric discharge machining apparatus
AssigneeFanuc Corporation
InventorsHaruki Obara, Yuji Okuyama
Life of this patent
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Abstract
A wire-cut electric discharge machining apparatus for cutting a workpiece by producing an electric discharge across the workpiece and a wire while a machining liquid is allowed to flow between the wire and the workpiece via machining liquid flow rate control apparatus. When machining speed is reduced and machining discharge energy diminishes at a corner-cut portion or at a portion which is to be cut into the shape of a circular arc, the machining liquid flow rate, namely the pressure of the liquid, is reduced to prevent wire oscillation.
Claims8
A wire-cut electric discharge machining apparatus for cutting an electrically conductive workpiece by producing an electric discharge across the workpiece and a wire while a machining liquid is allowed to flow between the wire and the workpiece, comprising:
- (a) first control means for controlling electric discharge energy supplied between the wire and the workpiece;
- (b) machining liquid supply means having second control means for controlling flow rate of the machining liquid supplied between the wire and the workpiece;
- and
- (c) third control means for controlling said second control means to decrease the flow rate of the machining liquid dependent upon a decrease in an amount of electric discharge energy at one of the group of a corner-cut portion and a portion cut into the shape of a circular arc.
Dependencies are inferred from the claim text.