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 method is provided comprising identifying an alignment point of a workpiece; positioning a first end of an electrode in the direction of the alignment point of the workpiece; applying a first voltage to the electrode wherein the applied first voltage generates a spark; rotating the electrode in a first direction; advancing the electrode toward the alignment point by a first distance wherein advancing the electrode and applying the first voltage creates a first orifice section; applying a second voltage to the electrode and modifying one or more operational parameters of the electrode; advancing the electrode toward the alignment point by a second distance wherein advancing the electrode and applying the second voltage causes formation of at least a second orifice section; wherein the first and second orifice sections cooperate to form an orifice comprising a first flow area and a second flow area.

A method is provided comprising identifying an alignment point of a workpiece; positioning a first end of an electrode in the direction of the alignment point of the workpiece; applying a first voltage to the electrode wherein the applied first voltage generates a spark; rotating the electrode in a first direction; advancing the electrode toward the alignment point by a first distance wherein advancing the electrode and applying the first voltage creates a first orifice section; applying a second voltage to the electrode and modifying one or more operational parameters of the electrode; advancing the electrode toward the alignment point by a second distance wherein advancing the electrode and applying the second voltage causes formation of at least a second orifice section; wherein the first and second orifice sections cooperate to form an orifice comprising a first flow area and a second flow area.

A machining program editor that edits a machining program in which a machining path for a wire electrode of a wire electrical discharge machine is set, the machining program editor including: a path determination unit configured to determine whether or not the machining path includes a linear path section that crosses a boundary line between a thick portion of a workpiece and a thin portion of the workpiece, a thickness of the thin portion being smaller than a thickness of the thick portion in an extending direction of the wire electrode; and a path compensator configured to compensate the machining path so as to form, in the thin portion over a predetermined distance, a protrusion projecting outward from the boundary line when the path determination unit determines that the linear path section is included.

A machining program editor that edits a machining program in which a machining path for a wire electrode of a wire electrical discharge machine is set, the machining program editor including: a path determination unit configured to determine whether or not the machining path includes a linear path section that crosses a boundary line between a thick portion of a workpiece and a thin portion of the workpiece, a thickness of the thin portion being smaller than a thickness of the thick portion in an extending direction of the wire electrode; and a path compensator configured to compensate the machining path so as to form, in the thin portion over a predetermined distance, a protrusion projecting outward from the boundary line when the path determination unit determines that the linear path section is included.

A wire disconnection prediction device includes: a data acquisition part configured to acquire data relating to machining of a workpiece during machining of the workpiece by a wire electric discharge machine; a preprocessing part configured to create, based on the data acquired by the data acquisition part, machining condition data, machining member data and machining state data, as state data indicating a state of the machining; and a machine learning device configured to execute, based on the state data created by the preprocessing part, processing relating to machine learning using a learning model indicating correlation between a machining state in the wire electric discharge machine and presence/absence of a possibility of disconnection occurrence of a wire electrode in the wire electric discharge machine and a disconnection cause by a plurality of class sets.

A wire disconnection prediction device includes: a data acquisition part configured to acquire data relating to machining of a workpiece during machining of the workpiece by a wire electric discharge machine; a preprocessing part configured to create, based on the data acquired by the data acquisition part, machining condition data, machining member data and machining state data, as state data indicating a state of the machining; and a machine learning device configured to execute, based on the state data created by the preprocessing part, processing relating to machine learning using a learning model indicating correlation between a machining state in the wire electric discharge machine and presence/absence of a possibility of disconnection occurrence of a wire electrode in the wire electric discharge machine and a disconnection cause by a plurality of class sets.

A multiwire electric discharge machine includes: a machining power source that applies a machining pulse voltage between a workpiece and a cutting wire section; and a wire breakage detection unit that detects breakage of a wire electrode. The wire breakage detection unit is electrically connected in parallel to a wire electrode portion stretched over a section from one location on the feeding side of the wire electrode to one location on the ejection side of the wire electrode, and the wire breakage detection unit includes: a wire breakage detection circuit in which a wire breakage detection power source constantly supplying direct current to the wire electrode portion at least while the workpiece is undergoing a cutting process and a current limiting resistor are connected in series; and a wire breakage determination unit that determines breakage of the wire electrode based on current flowing through the current limiting resistor.

A multiwire electric discharge machine includes: a machining power source that applies a machining pulse voltage between a workpiece and a cutting wire section; and a wire breakage detection unit that detects breakage of a wire electrode. The wire breakage detection unit is electrically connected in parallel to a wire electrode portion stretched over a section from one location on the feeding side of the wire electrode to one location on the ejection side of the wire electrode, and the wire breakage detection unit includes: a wire breakage detection circuit in which a wire breakage detection power source constantly supplying direct current to the wire electrode portion at least while the workpiece is undergoing a cutting process and a current limiting resistor are connected in series; and a wire breakage determination unit that determines breakage of the wire electrode based on current flowing through the current limiting resistor.

An estimation method and a control device for a wire electrical discharge machine, for estimating whether a wire electrode has disconnected on the basis of information obtained from a motor included in a feed mechanism of the wire electrode. The control device is provided with a roller for feeding a wire electrode in a direction of feeding out, and a motor for causing the roller to rotate. The control device includes: an acquisition unit for acquiring a value for a disturbance load based on a drive current of the motor, a value for the rotational speed of the motor, and/or a value for a torque command for causing the motor to rotate at a commanded speed determined in advance; and an estimation unit for estimating whether the wire electrode has disconnected on the basis of the disturbance load, the rotational speed, and/or the torque command acquired by the acquisition unit.