Method of canceling a short circuit in a wire cut electric discharge machine
First Claim
1. A method of canceling a short circuit in a wire cut electric discharge machine, which cancels a short circuit generated between a wire and a workpiece during an electric discharge machining, the method comprising the steps of:
- moving the wire in a reverse direction along a path previously machined by a first determined distance when a short circuit between the wire and the workpiece is detected;
performing a reversible control of the wire by moving the wire in a second direction and by a second distance determined based on machining profiles and a position of the wire moved in the reverse direction and located at the first determined distance, in order to cancel a short circuit in a direction perpendicular to a wire advancing direction;
advancing the wire along the path through which the wire is moved by the reversible control and the path previously machined, thereby returning the wire to the position where the short circuit is initially detected after the short circuit is canceled by the reversible control, and then continuing machining.
1 Assignment
0 Petitions
Accused Products
Abstract
A method of canceling a short circuit in a wire cut electric discharge machine, capable of speedily and surely canceling the short circuit generated in not only the wire advancing direction but also the perpendicular direction to the advancing one. When the short circuit is detected, the wire is reversed by determined distance LO, and if the short circuit is not canceled at that time, it is determined that the short circuit occurs in the perpendicular direction to the wire advancing one sequentially, machining profiles and the wire position are determined so that the optimum reversible control can be performed, thus the reversing direction and distance of the wire being determined. Further, the optimum reversible control is carried out on the basis of the determined reversing direction and distance, and the wire is returned to the position where the short circuit is initially detected if the cancellation of the short circuit is detected, thus the electric discharge machining being restarted.
10 Citations
8 Claims
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1. A method of canceling a short circuit in a wire cut electric discharge machine, which cancels a short circuit generated between a wire and a workpiece during an electric discharge machining, the method comprising the steps of:
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moving the wire in a reverse direction along a path previously machined by a first determined distance when a short circuit between the wire and the workpiece is detected; performing a reversible control of the wire by moving the wire in a second direction and by a second distance determined based on machining profiles and a position of the wire moved in the reverse direction and located at the first determined distance, in order to cancel a short circuit in a direction perpendicular to a wire advancing direction; advancing the wire along the path through which the wire is moved by the reversible control and the path previously machined, thereby returning the wire to the position where the short circuit is initially detected after the short circuit is canceled by the reversible control, and then continuing machining. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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Specification