Electric discharge machining device and electric discharge machining method

An electric discharge machining apparatus comprising:

• an electrode mounting unit which holds a tool electrode;
• an electrode driving unit having a radial driving unit which drives the electrode mounting unit in a non-contact manner in a radial direction and a thrust driving unit which drives the electrode mounting unit in a non-contact manner in a thrust direction;
• a position adjusting unit which adjusts position of the electrode driving unit or of a workpiece;
• a machining state detecting unit which detects an electric discharge machining state to obtain a detected value;
• a reference value setting unit which sets a reference value to control the electric discharge machining state;
• a machining pass setting unit which sets a machining pass;
• and
• a coordinating machining control unit which adjusts relative positions of the tool electrode and the workpiece by coordinating the electrode driving unit with the position adjusting unit, while taking into consideration the machining pass set by the machining pass setting unit, so that the state detected by the machining state detecting unit coincides with the reference value set by the reference value setting unit.

An electric discharge machining method comprising:

• driving an electrode mounting unit which holds a tool electrode in a non-contact manner in a radial direction and driving the electrode mounting unit in a non-contact manner in a thrust direction;
• electrically insulating a part of the electrode mounting unit that faces one of a radial driving unit and a thrust driving unit to prevent machining current from flowing into the part;
• and
• adjusting position of the tool electrode with respect to the workpiece while taking into consideration a set machining pass, so that a detected value of an electric discharge machining state coincides with a set reference value of the electric discharge machining state.

An electric discharge machining method comprising:

• driving an electrode mounting unit which holds a tool electrode in a non-contact manner in a radial direction and driving the electrode mounting unit in a non-contact manner in a thrust direction;
• electrically insulating a part of the electrode mounting unit that faces one of a radial driving unit and a thrust driving unit to prevent machining current from flowing into the part;
• adjusting position of a driving unit or a workpiece;
• and
• adjusting position of the tool electrode with respect to the workpiece while taking into consideration a set machining pass, so that a detected value of an electric discharge machining state coincides with a set reference value of the electric discharge machining state by coordinating the driving unit with the adjusting unit.

An electric discharge machining apparatus comprising:

• an electrode mounting unit having a through hole for inserting a wire electrode therethrough and which has a holding and feeding mechanism for the electrode;
• an electrode driving unit having a thrust driving unit which drives the electrode mounting unit at least in a non-contact manner in a thrust direction;
• a machining state detecting unit which detects an electric discharge machining state as a detected value;
• a reference value setting unit which sets a reference value to control the electric discharge machining state;
• a machining control unit which adjusts a position of the wire electrode by controlling the electrode driving unit so that the state detected by the machining state detecting unit coincides with the reference value set by the reference value setting unit;
• and
• an electrode supply control unit which adjusts holding and feeding of the electrode.

An electric discharge machining apparatus comprising:

• an electrode mounting unit having a through hole for inserting a wire electrode therethrough and having a holding mechanism for holding the wire electrode;
• an electrode driving unit having a thrust driving unit which drives the electrode mounting unit in a non-contact manner at least in a thrust direction;
• a machining state detecting unit which detects an electric discharge machining state as a detected value;
• a reference value setting unit which sets a reference value to control the electric machining state;
• and
• a machining control unit which adjusts position of the wire electrode by controlling the electrode driving unit so that the state detected by the machining state detecting unit coincides with the reference value set by the reference value setting unit.

An electric discharge machining apparatus comprising:

• an electrode mounting unit having a through hole for inserting a wire electrode therethrough and having a holding mechanism for holding the wire electrode;
• an electrode driving unit having a thrust driving unit which drives the electrode mounting unit in a non-contact manner at least in a thrust direction;
• a bearing unit which supports the electrode mounting unit in an X-Y plane;
• a machining state detecting unit which detects an electric discharge machining state as a detected value;
• a reference value setting unit which sets a reference value to control the electric machining state;
• and
• a machining control unit which adjusts position of the wire electrode by controlling the electrode driving unit so that the state detected by the machining state detecting unit coincides with the reference value set by the reference value setting unit.