An electrical discharge machine which is less likely to be used in a high risk state. This electrical discharge machine is provided with an intra-setting modification display control unit that, when a risk level corresponding to a setting content directed by a user is higher than or equal to an alert-causing threshold value, displays an intra-setting modification alert-causing display, and a post-setting modification display control unit that, if the state in which the risk level is higher than or equal to the alert threshold value continues, displays a post-setting modification alert-causing display at predetermined time intervals.

A wire electrical discharge machine controls a second motor unit including motors for feeding a wire electrode in a wire running direction in which the wire electrode extends, so as to feed the wire electrode at a set feed rate during a machining period from a first time point at which the wire electrode moving relative to a workpiece in a direction intersecting the wire running direction is estimated to enter the workpiece, to a second time point at which the wire electrode is estimated to exit the workpiece. The second motor unit is controlled so as to feed the wire electrode at a feed rate lower than the set feed rate during at least one of a first non-machining period from a processing start time point to the first time point and a second non-machining period from the second time point to a processing end time point.

A method for the monitoring of a wire electrical discharge machining (WEDM) process, the method comprising the steps of: setting a unit observation length for the signal acquisition, continuously acquiring at least one process signal which is representative of an amount of material removed by at least one discharge and the position (X;Y) of said at least one discharge, and determining, based on said at least one process signal and one or more properties of a current machining, a cumulated amount of material removed per unit observation length along a machining path, including amounts of material removed by travelling in a forward cutting direction and amounts of material removed by travelling in a reverse cutting direction.

Provided are a wire electric discharge machine, a correction device, and a correction method which accurately correct position information indicating the position of a supporting point of each of an upper guide and a lower guide. The correction device includes: a storage unit that stores the position information; an inclination control unit that causes a wire electrode to incline at a predetermined angle; a measurement unit that measures a relative movement amount from a state in which the lower guide and a measurement site are separated by a predetermined distance in a relative movement direction to a state in which the wire electrode inclined at the predetermined angle reaches the measurement site; and an information, correction unit that corrects the position information of the storage unit on the basis of the predetermined angle and the relative movement amount.

There is provided a wire electrical discharge machine that includes a temperature detection unit, an actual position correction amount calculation unit, a correction amount calculation unit, a correction amount adjustment unit, a position correction amount adjustment unit, and a corrective movement amount calculation unit. The actual position correction amount calculation unit calculates an actual position correction amount for an upper/lower guide section in accordance with reference position coordinates at a reference temperature and with actual position coordinates at a temperature different from the reference temperature. The correction amount calculation unit uses a prepared correction amount arithmetic expression. The correction amount adjustment unit calculates a correction amount adjustment value from the actual position correction amount and the position correction amount.

The disclosure provides a wire electric discharge machine and a wire electric discharge machining method capable of detecting concentrated electric discharge in real time by a discharge position obtained from a preliminary discharge current, and calculating an accurate discharge position for use in measuring a plate thickness or the like. The wire electric discharge machine according to the disclosure includes a discharge position calculation circuit calculating a discharge position from the preliminary discharge current respectively detected through a current detector during a first period from a time when a waveform of the preliminary discharge current supplied to a machining gap, formed by a wire electrode and a workpiece, rises to a time when the preliminary discharge current reaches a constant current value, and a second period after the time when the preliminary discharge current reaches the constant current value to a time when a main discharge current is supplied.

A machining program creating device for a wire electric discharge machine creates a machining program for machining a keyway on the side surface of a round hole in a workpiece, based on a previously specified diameter of the round hole, a center position of the round hole measured by bringing a wire electrode into contact with the workpiece, and a previously defined shape of the keyway.

Disclosed is a device for the electrochemical processing of components, having at least one electrode and at least one electrode holder, with which the electrode is movably mounted. The device comprises at least one optical measurement system for determining the position of the electrode. Also disclosed is a method for the electrochemical processing of a component, in particular with such a device, in which the electrode is moved during the electrochemical processing, the position of the electrode being detected by means of an optical measurement system.

A method for electrical discharge drilling of a hole in a part made of electroconductive material, in particular for an aircraft turbomachine, the method using an electrical discharge machine including a head that can move relative to the part and has a consumable EDM electrode, which is of elongated shape and is translationally moved along its elongation axis, the method including the following steps: a) advancing the EDM electrode towards the part in order to drill a hole in the part; and b) retracting the EDM electrode and removing the EDM electrode from the hole, wherein it further includes the following steps: c) laterally moving the head; d) advancing the EDM electrode towards the part in order to scan for the part; e) computing the effective depth of the hole drilled in step a).

An object of the present invention is to accurately position a wire electrode and a work. A control device included in a wire electric discharge machine of the present invention causes, in a state in which movement of the wire electrode in a longitudinal direction is stopped, a capacitance measuring section to measure capacitance while causing a driving section to relatively move a wire electrode and a work, thereafter causes, in a state in which the control device causes a wire moving section to move the wire electrode in the longitudinal direction, the capacitance measuring section to measure the capacitance, and causes the driving section to adjust relative positions of the wire electrode and the work.