Electric discharge machining method
AssigneeMitsubishi Denki Kabushiki Kaisha
InventorsHiroshi Takeuchi, Tomoko Sendai, Yozo Sakai
Life of this patent
Estimating the term…
Abstract
An electric discharge machining method which is practiced with stable machining condition and with high machining efficiency. The condition which, in machining a workpiece, tends to place the gap between the electrode and workpiece in unstable state is detected, and the period of time for which the condition thus selected lasts is set so that the discharge energy of a pulse voltage applied across the electrode and the workpiece is reduced for the period of time thus set. Therefore, in the electric discharge machining method of the invention, the machining operation is maintained stable with high machining efficiency at all times.
Claims7
An electric discharge machining method in which an electric discharge is generated in a gap between an electrode and a workpiece by applying a pulse voltage across the gap to thereby machine said workpiece, the gap being filled with a machining solution, comprising the steps of:
- selecting a condition which tends to place the gap between said electrode and workpiece in an unstable state for machining said workpiece;
- setting a period of time for which the condition selected lasts;
- and
- reducing the discharge energy provided by the pulse voltage for the period of time thus set when the condition is detected.
An electric discharge machining method in which an electric discharge is generated in a gap between an electrode and a workpiece by applying a pulse voltage across the gap to thereby machine said workpiece, the gap being filled with a machining solution, comprising the steps of:
- detecting a state of said gap between said electrode and workpiece;
- and
- changing the electric discharge energy of said pulse voltage stepwise so that said state thus detected is maintained equal to a reference state which has been set to machine said workpiece stably, wherein said reference state is selected substantially near a threshold amount between a stable machining state and an unstable machining state.
Dependencies are inferred from the claim text.