Fully automated machining apparatus optimization for electric discharge machining apparatus
AssigneeHitachi Seiko Ltd.
InventorsMasakazu Kishi, Yasuo Suzuki
Life of this patent
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Abstract
An electric discharge machining apparatus capable of automatically optimizing the machining stabilizing condition including set voltage of machining pulse, duty factor of the pulse, electrode raising period and working fluid pressure, and hence capable of being full-automated. Each machining stabilizing condition is successively changed within a predetermined range and set when the maximum effective discharge generation rate is obtained. Spark machining is effected on the basis of the set value.
Claims18
An electric discharge machining apparatus in which discharge pulses are generated between an electrode and a workpiece for spark machining of the workpiece, said apparatus comprising:
- power source means for applying a pulse voltage across the electrode and the workpiece to produce discharge pulses;
- discharge state detecting means coupled to said power source means for generating detection outputs representative of discharge states between said electrode and workpiece;
- search means for changing a plurality of machining stabilizing conditions in a predetermined order and within a predetermined range of values of each of said machining stabilizing conditions to produce variation in the rate of generation of discharge pulses, and providing a search sequence pattern of said machining stabilizing conditions selected from one of a plurality of search sequence patterns in accordance with a choice of electrode material, workpiece material, and a working fluid supplying method;
- maximum value discriminating and storing means coupled to said discharge state detecting means for discriminating a maximum value of the effective discharge generation rate throughout said change of said at least one machining stabilizing condition and storing therein the maximum value;
- and
- optimizing machining condition storing means coupled to said maximum value discriminating and storing means for storing therein an optimized machining condition corresponding to the maximum value of the effective discharge generation rate for each machining stabilizing condition;
- whereby spark machining is effected on the basis of the optimized machining condition.
An electric discharge machining apparatus in which discharge pulses are generated between an electrode and a workpiece for spark machining of the workpiece, said apparatus comprising;
- power source means for applying pulse voltages across the electrode and the workpiece to produce discharge pulses;
- program control means programmed with a plurality of discharge pulse designation signals for designating the pulse voltage of said power source means and control signals for setting an optimized machining stabilizing condition;
- discharge state detecting means coupled to said power source means for generating detection outputs representative of discharge states between said electrode and workpiece;
- and
- machining stabilizing control means coupled to said discharge state detecting circuit and said program control means for changing at least one machining stabilizing condition in a predetermined order and within a predetermined range of values for setting optimized machining stabilizing conditions and providing a control sequence pattern of said at least one machining stabilizing condition selected from one of a plurality of control sequence patterns stored in said program control means in accordance with a choice of electrode material, a workpiece material, and a working fluid supplying method;
- whereby spark machining is effected on the basis of the optimized machining stabilizing condition.
An electric discharge machining apparatus in which discharge pulses are generated between an electrode and a workpiece for spark machining of the workpiece, said apparatus comprising:
- power source means for applying pulse voltages across the electrode and the workpiece to produce discharge pulses;
- program control means programmed with a plurality of discharge pulse designation signals for designating the pulse voltage of said power source means and control signals for setting an optimized machining stabilizing condition;
- discharge state detecting means coupled to said power source means for generating detection outputs representative of discharge states between said electrode and workpiece;
- machining stabilizing control means coupled to said discharge state detecting circuit and program control means for changing at least one machining stabilizing condition in a predetermined order and within a predetermined range of values for setting optimized machining stabilizing conditions, discriminating a maximum value of effective discharge generation rate throughout said change of said at least one machining stabilizing condition and storing the maximum value, storing an optimized machining condition corresponding to the maximum value of the effective discharge generation rate, and providing a control sequence pattern of said at least one machining stabilizing condition selected from one of a plurality of control sequence patterns stored in said program control means in accordance with a choice of electrode material, a workpiece material, and a working fluid supplying method;
- and
- whereby spark machining is effected on the basis of the optimized machining stabilizing condition.
Dependencies are inferred from the claim text.