Device and method for high frequency electrical discharge machining
First Claim
1. A method for electrical discharge machining of a work piece by means of a working electrode, wherein:
- a sequence of working pulses is applied on a work gap between a working electrode and the work piece, wherein the working pulses comprise;
eroding pulses for eroding material off the work piece; and
measuring pulses during which an ignition voltage is applied on the work gap in order to initiate a discharge within the work gap and to measure the corresponding ignition delay time; and
the ignition voltage and/or the gap width are adjusted such that the ignition delay time is smaller than an oscillation time of the working electrode oscillating within the work gap due to the electrostatic attraction force and the mechanical restoring force.
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Abstract
The invention relates to a device and a method for electrical discharge machining of a work piece by means of a working electrode. A sequence of working pulses is applied on the work gap between the working electrode and the work piece. The working pulses comprise eroding pulses for eroding material off the work piece and measuring pulses during which an ignition voltage is applied on the work gap in order to initiate a discharge within the work gap and to measure the corresponding ignition delay time. The ignition voltage and/or the gap width are adjusted such that the ignition delay time is smaller than an oscillation time of the working electrode oscillating within the work gap due to the electrostatic attraction force and the mechanical restoring force.
13 Citations
31 Claims
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1. A method for electrical discharge machining of a work piece by means of a working electrode, wherein:
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a sequence of working pulses is applied on a work gap between a working electrode and the work piece, wherein the working pulses comprise;
eroding pulses for eroding material off the work piece; and
measuring pulses during which an ignition voltage is applied on the work gap in order to initiate a discharge within the work gap and to measure the corresponding ignition delay time; and
the ignition voltage and/or the gap width are adjusted such that the ignition delay time is smaller than an oscillation time of the working electrode oscillating within the work gap due to the electrostatic attraction force and the mechanical restoring force. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21)
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22. A device for electrical discharge machining of a work piece by means of a working electrode, comprising:
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an axis servo controller designed to control a gap width of the work gap between the working electrode and the work piece;
a pulse generator designed to generate eroding pulses to be applied on the work gap for eroding material off the work piece and to generate measuring pulses having an ignition voltage to be applied on the work gap for initiating a discharge within the work gap; and
a controller designed to detect the ignition delay time within a measuring pulse, to control the pulse generator such that a sequence of machining pulses is applied on the work gap comprising measuring pulses and eroding pulses, and to cooperate with the axis servo controller by controlling the gap width and/or to cooperate with the pulse generator by controlling the ignition voltage such that the ignition delay time is kept smaller than an oscillation time of the working electrode oscillating within the work gap due to the electrostatic attraction force and the mechanical restoring force. - View Dependent Claims (23, 24, 25, 26, 27, 28, 29, 30, 31)
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Specification