A wire electric discharge machine according to the present invention includes a multijoint robot including a wire crossing mechanism for crossing a wire electrode on its tip end, a robot controller for controlling the multijoint robot, a numerical controller for controlling the wire electric discharge machine, and a transmission unit for transmitting a coordinate position when the multijoint robot is driven and controlled to move the wire crossing mechanism from the robot controller to the numerical controller, and the numerical controller synchronizes a position of each shaft of the wire electric discharge machine with a movement of the wire crossing mechanism with reference to the coordinate position transmitted by the transmission unit.

A multiwire electric discharge machine includes: a plurality of guide rollers; a machining power supply that applies a voltage between each of a plurality of cutting wire sections and a workpiece; a dummy workpiece including a contact surface curved in such a way as to be capable of coming into contact with a curved surface of the workpiece except for an end point, the end point being to be reached by each of the plurality of cutting wire sections when machining of the workpiece is completed, the dummy workpiece supporting the workpiece from one side in a first direction, the first direction being a direction in which the workpiece moves; and a pressing mechanism including a pressing portion, the pressing mechanism pressing the workpiece against the dummy workpiece by bringing the pressing portion into contact with the workpiece from another side in the first direction.

A wire electrical discharge machine for detecting an end face of an object, configured so that when a contact detection movement is started and if contact between the wire electrode and the workpiece is detected, positions in which the contact between the wire electrode and the workpiece is detected are stored as contact detection positions and that when a non-contact detection movement is then started and if non-contact between the wire electrode and the workpiece is detected, positions in which the non-contact between the wire electrode and the workpiece is detected are stored as non-contact detection positions. When it is determined whether or not a set number of times of execution is reached and if the set number of times of execution is reached, a reference position is obtained by adding the radius of the wire electrode and a clearance of the wire guide to an end face determination position.

One arbitrary point on an upper surface of a workpiece and two points at arbitrary heights on a tapered section of the workpiece are measured using a contact detector disposed on an upper wire guide of a wire electric discharge machine to calculate the shape accuracy and tapered angle. Based on the calculated data, the upper and lower wire guide support positions of the upper and lower wire guides are calculated. Using the calculated upper and lower wire guide support positions, electric discharge machining is performed on the workpiece.

Provided is a device for controlling a wire electrical discharge machining apparatus, the device making it possible to improve machining precision even in machining in which a plurality of corner control segments overlap. A device for controlling a wire electrical discharge machining apparatus, the device comprising: a storage unit that stores a machining program and a prescribed plurality of corner control patterns that can be applied to each corner part; a control unit that performs corner control for switching between prescribed machining conditions on the basis of a corner shape during machining of a corner part; a calculation unit that calculates a corner control segment from the start point and the end point of the corner control; and a selection unit that, when the corner control segments calculated by the calculation unit overlap, selects one corner control pattern to perform in a prioritized manner from the storage unit.

Provided is a device for controlling a wire electrical discharge machining apparatus, the device making it possible to improve machining precision even in machining in which a plurality of corner control segments overlap. A device for controlling a wire electrical discharge machining apparatus, the device comprising: a storage unit that stores a machining program and a prescribed plurality of corner control patterns that can be applied to each corner part; a control unit that performs corner control for switching between prescribed machining conditions on the basis of a corner shape during machining of a corner part; a calculation unit that calculates a corner control segment from the start point and the end point of the corner control; and a selection unit that, when the corner control segments calculated by the calculation unit overlap, selects one corner control pattern to perform in a prioritized manner from the storage unit.

A wire electrical discharge machining equipment for different workpiece heights comprises a wire electrode, a machining detecting device and a controller. The wire electrode has an electrode length and is configured to machine a workpiece. The machining detecting device is configured to detect and obtain a machining parameter set of the wire electrode while machining the workpiece. Wherein, the machining parameter set comprises a discharge frequency, a working voltage and a discharge parameter, and the discharge parameter is corresponding to a material removal amount. The controller is connected to the wire electrode and the machining detecting device. The controller is configured to compute a workpiece height of the workpiece according to the discharge frequency and the working voltage, and compute a machining feed rate according to the workpiece height and the material removal amount. The controller is configured to adjust the electrode length to the workpiece height and controls the wire electrode to machine the workpiece with the machining feed rate.