A wire electrical discharge machine includes a wire feeding hole position acquisition unit configured to obtain a position of a wire feeding hole that allows for insertion and feeding of a wire electrode. In this wire electrical discharge machine, when the position of the wire feeding hole obtained by the wire feeding hole position acquisition unit is deviated from a wire feeding position defined by a machining program, a wire feeding control unit controls a machine main body to move the wire electrode to the position of the wire feeding hole and feed the wire electrode there, and a machining control unit controls the machine main body to perform electrical discharge machining on a workpiece with the wire electrode while moving the wire electrode on a path segment between a position where the wire electrode has been fed and the wire feeding position defined by the machining program.

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.

Methods and systems for wire-electro discharge machining of components are described. The method comprises machining a first component by moving a wire-EDM electrode along a first set of cutting paths associated with a plurality of cutting passes, the cutting paths determined based on a desired profile shape of the component, obtaining a cutting parameter of the first component post-machining, determining a first modified cutting path for a second component based on the cutting parameter, and machining the second component by moving the wire-EDM electrode along a second set of cutting paths associated with the plurality of cutting passes, the second set of cutting paths comprising the first modified cutting path.

A wire electrical discharge machine machines a workpiece so as to have different machined shapes on a top surface and a bottom surface of the workpiece. The wire electrical discharge machine includes: a distance measuring sensor for moving within a machining area of the wire electrical discharge machine and measuring a distance between the distance measuring sensor and an object to be measured; and a vertical position calculating unit for calculating a distance between a reference surface and the top surface and a distance between the reference surface and the bottom surface, from a distance between the reference surface and the distance measuring sensor, a distance between the top surface and the distance measuring sensor, and a distance between the bottom surface and the distance measuring sensor, measured by the distance measuring sensor.

A wire electrical discharge machine for performing electrical discharge machining on a workpiece by applying voltage to a discharge gap between a wire electrode and the workpiece to generate electrical discharge while causing the wire electrode and the workpiece to move relative to each other, includes: an electrical discharge machining control unit for performing electrical discharge machining by applying voltage to the discharge gap while moving the wire electrode relative to the workpiece according to a machining program and a machining condition; an approach section identifying unit for identifying an approach section in a machining path for the wire electrode with respect to the workpiece, based on the machining program; and an adjustment unit for adjusting the machining condition based on a preset adjustment ratio. In this machine, the electrical discharge machining control unit performs electrical discharge machining control in the approach section, using the adjusted machining condition.

To provide a wire electrical discharge machine for which the machining precision of corner parts and corner exit parts in a workpiece are improved. A wire electrical discharge machine includes a machining path compensation unit which compensates a machining path, in a case of creating a corner part which is a circular arc as a second machining block, by compensating a position of a center of the circular arc of the second machining block by way of a first compensation vector calculated based on at least one indicator among the four indicators of deflection of a wire electrode, etc., and inserting a linear first compensation block between an end point of the first machining block and a start point of a second machining block which was compensated, and by eliminating a predetermined distance from the start point of a third machining block, creates a starting point of this third machining block, and then inserts a second compensation block between the end point of the compensated second machining block and the created starting point of the first machining block.

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.

A wire electrical discharge machine performs electrical discharge machining on a workpiece by applying voltage across an electrode gap formed between a wire electrode and the workpiece to thereby generate electrical discharge while moving the wire electrode relative to the workpiece along a path specified by a machining program. The wire electrical discharge machine includes: a voltage detector for detecting a gap voltage across the gap; a facing area calculation unit for calculating, as a facing area, the area of a surface of the workpiece contained within a predetermined distance from the center axis of the wire electrode; an axis feed rate determination unit for determining an axis feed rate based on the gap voltage value detected by the voltage detector, and the facing area; and a movement control unit for performing control so that the wire electrode moves relative to the workpiece at the axis feed rate.

A wire electrical discharge machine includes: a drive control unit for moving a wire electrode relative to a workpiece along a machining path; a path determination unit for determining whether or not the machining path includes a linear path section that crosses a boundary line between a thick portion and a thin portion of the workpiece; and a path compensator for compensating the machining path so as to form, in the thin portion, a protrusion projecting outward from the boundary line when the path determination unit determines that the linear path section is included.

A wire electrical discharge machine includes an upper wire guide and a lower wire guide supporting a wire electrode, a probe provided on an upper guide block having the upper wire guide, an offset storage unit for storing an offset amount from the upper wire guide to the probe, a position shift drive unit for changing the relative position between the table, and the upper and lower wire guides, a drive controller for controlling the position shift drive unit, a contact position calculator for calculating a contact position that is a position of the probe when it comes in contact, and a machining start position calculator for calculating a machining start position of the wire electrode, based on at least two contact positions and the offset amount. The drive controller controls the position shift drive unit so that the position of the wire electrode becomes the machining start position.