Abstract: The object of the present invention is to make it possible to maintain a stable electric discharge and to achieve a stable quality and machining performance even when a work having a non-uniform composition is machined. A wire electric discharge machining device performs electric discharge machining on a work while controlling an inter-electrode distance between a wire and the work based on an inter-electrode voltage between the wire and the work so as to match a set target voltage. The wire electric discharge machining device includes an inter-electrode voltage measuring unit that measures the inter-electrode voltage, an actual amplitude calculating unit that calculates an amplitude of the measured inter-electrode voltage, and a target voltage correcting unit that corrects the target voltage in such a way that the calculated amplitude approaches the target amplitude that is set to a value larger than zero.

Abstract: The object of the present invention is to make it possible to maintain a stable electric discharge and to achieve a stable quality and machining performance even when a work having a non-uniform composition is machined. A wire electric discharge machining device performs electric discharge machining on a work while controlling an inter-electrode distance between a wire and the work based on an inter-electrode voltage between the wire and the work so as to match a set target voltage. The wire electric discharge machining device includes an inter-electrode voltage measuring unit that measures the inter-electrode voltage, an actual amplitude calculating unit that calculates an amplitude of the measured inter-electrode voltage, and a target voltage correcting unit that corrects the target voltage in such a way that the calculated amplitude approaches the target amplitude that is set to a value larger than zero.

Abstract: Provided is a power supply unit, which is to be used for a multi-wire electrical discharge machining apparatus arranged to slice a material to be machined by an electrical discharge generated between a wire group including a plurality of turns of a wire arranged in parallel and the material to be machined, and to which a power supply terminal to be brought into contact with the wire group at a time to supply a voltage to the wire group is mounted, the power supply unit including: a mounting portion to which the power supply terminal to be brought into contact with the wire group at a time is mounted; and an adjusting portion arranged to adjust an inclination of the mounting portion in a direction crossing a running direction of the wire group.

Abstract: A wire electrical discharge machining apparatus includes: multiple main rollers around which a wire winds in parallel; multiple workpiece feeding units for feeding the workpiece toward the wire; a machining power supply unit for supplying a machining voltage to the workpiece; and a power supply terminal for supplying the machining voltage to the wire. The multiple workpiece feeding units are respectively arranged at a first position for feeding the workpiece toward a wire portion having a wire plane of the wire and a second position for feeding another workpiece toward another wire portion having another wire plane of the wire. The power supply terminal is arranged at a third position between the first position and the second position. The machining voltage supplied from the single machining power supply unit is supplied to the workpieces to be electrically discharge machined by the multiple workpiece feeding units.

Abstract: A multi-wire electrical discharge machining system for slicing a workpiece into a thin leaf at intervals of a plurality of wires arranged together causes the wires arranged together to travel in the same direction and includes a power feed contact configured to collectively comes into contact with the traveling wires, a machining power supply portion configured to supply a machining power supply to the power feed contact, and an electrical discharge portion configured to electrically discharge a machining power supply in which the traveling wires comes into contact with the power feed contact to collectively supply power to the traveling wires to the workpiece, in which a resistance between the machining power supply portion and the power feed contact is smaller than a resistance between the power feed contact and the electrical discharge portion.

Abstract: A mechanism capable of decreasing wires which are not appropriately supplied with power and performing the electrical discharge machining high in uniformity between multiple wires. A wire electrical discharge machining system configured to slice a workpiece at an interval of wires arranged side by side at equally spaced intervals causes the wire to travel in the same direction and includes a power feed contact configured to collectively supply a machining power supply to a plurality of the traveling wires, in which two adjacent power feed contacts respectively come into contact with the plurality of the wires supplied with the machining power supply and arranged without being aligned in the direction vertical to the direction in which the wire travels.

Abstract: Provided is a power supply unit, which is to be used for a multi-wire electrical discharge machining apparatus arranged to slice a material to be machined by an electrical discharge generated between a wire group including a plurality of turns of a wire arranged in parallel and the material to be machined, and to which a power supply terminal to be brought into contact with the wire group at a time to supply a voltage to the wire group is mounted, the power supply unit including: a mounting portion to which the power supply terminal to be brought into contact with the wire group at a time is mounted; and an adjusting portion arranged to adjust an inclination of the mounting portion in a direction crossing a running direction of the wire group.

Abstract: A wire electrical discharge machining apparatus includes: multiple main rollers around which a wire winds in parallel; multiple workpiece feeding units for feeding the workpiece toward the wire; a machining power supply unit for supplying a machining voltage to the workpiece; and a power supply terminal for supplying the machining voltage to the wire. The multiple workpiece feeding units are respectively arranged at a first position for feeding the workpiece toward a wire portion having a wire plane of the wire and a second position for feeding another workpiece toward another wire portion having another wire plane of the wire. The power supply terminal is arranged at a third position between the first position and the second position. The machining voltage supplied from the single machining power supply unit is supplied to the workpieces to be electrically discharge machined by the multiple workpiece feeding units.

Abstract: The present invention provides a mechanism capable of decreasing wires which are not appropriately supplied with power and performing the electrical discharge machining high in uniformity between multiple wires. A wire electrical discharge machining system configured to slice a workpiece at an interval of wires arranged side by side at equally spaced intervals causes the wire to travel in the same direction and includes a power feed contact configured to collectively supply a machining power supply to a plurality of the traveling wires, in which two adjacent power feed contacts respectively come into contact with the plurality of the wires supplied with the machining power supply and arranged without being aligned in the direction vertical to the direction in which the wire travels.