The present invention relates to a double one-track electro-discharge wire cutting method, comprising a step of forward wire running and a step of reverse wire running wherein a wire running direction of the step of forward wire running is opposite to that of the step of reverse wire running; with wire running in the step of forward wire running, one processing element is completed by discharge cutting processing, and with wire running in the step of reverse wire running, another processing element is completed by discharge cutting processing. The method can improve the processing efficiency and recycle the electrode wire while ensuring the processing precision.

The present invention relates to a double one-track electro-discharge wire cutting method, comprising a step of forward wire running and a step of reverse wire running wherein a wire running direction of the step of forward wire running is opposite to that of the step of reverse wire running; with wire running in the step of forward wire running, one processing element is completed by discharge cutting processing, and with wire running in the step of reverse wire running, another processing element is completed by discharge cutting processing. The method can improve the processing efficiency and recycle the electrode wire while ensuring the processing precision.

A wire electrical discharge machine includes: a travelling route formed of multiple divisional regions, through which a wire electrode is fed by an auto wire feeding mechanism; and a memory storing failure evaluation reference data on the auto wire feeding for every divisional region. The wire electrical discharge machine detects failure of the auto wire feeding and locate the tip position of the wire electrode at the time of failure and causes a controller to determine whether to perform or stop retry of the auto wire feeding based on the located tip position and the failure evaluation reference data for every divisional region.

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.

The present invention discloses a multifunction integrated manufacturing system based on electrical machining, including a robot, a motion control unit, a multifunction composite electrical power supply, a working medium supply and recycle unit, a wire feeding device, a tool holder quick-change clamping unit, an electrical machining tool holder, a welding tool holder, a detection tool holder, and a workbench. By using the robot as an actuator, the system can implement discharge additive manufacturing including arc additive forming and micro electrical discharge deposition forming, discharge subtractive machining including efficient arc machining and precise electrical discharge machining, part joining based on arc surfacing, and online detection based on optical scanning and ultrasonic flaw detection. The present invention has a high integration level, covers machining and manufacturing of difficult-to-machine materials and micro parts, and can implement efficient and precise machining. The present invention can be implemented in a variety of media without environmental restrictions thus having a broad application range and having a strong application prospect in extreme environments such as space and deep sea.

The present invention discloses a multifunction integrated manufacturing system based on electrical machining, including a robot, a motion control unit, a multifunction composite electrical power supply, a working medium supply and recycle unit, a wire feeding device, a tool holder quick-change clamping unit, an electrical machining tool holder, a welding tool holder, a detection tool holder, and a workbench. By using the robot as an actuator, the system can implement discharge additive manufacturing including arc additive forming and micro electrical discharge deposition forming, discharge subtractive machining including efficient arc machining and precise electrical discharge machining, part joining based on arc surfacing, and online detection based on optical scanning and ultrasonic flaw detection. The present invention has a high integration level, covers machining and manufacturing of difficult-to-machine materials and micro parts, and can implement efficient and precise machining. The present invention can be implemented in a variety of media without environmental restrictions thus having a broad application range and having a strong application prospect in extreme environments such as space and deep sea.

A wire electrical discharge machine for machining a workpiece by generating electric discharge at a discharge gap between the workpiece and a wire electrode includes: a machining current setting unit for setting the magnitude of a normal machining current depending on the discharge gap state at application of a discharge induction voltage at the previous time or previous times; and a machining current control unit configured to control a main discharge circuit so as to supply the normal machining current to the discharge gap when the present discharge gap state is the normal state, control the main discharge circuit so as to supply a short-circuit machining current smaller than a predetermined current to the gap when the discharge gap state is the short-circuited state, and control the main discharge circuit so as not to supply any machining current to the gap when the discharge gap state is the open state.

A wire electrical discharge machine for machining a workpiece by generating electric discharge at a discharge gap between the workpiece and a wire electrode includes: a machining current setting unit for setting the magnitude of a normal machining current depending on the discharge gap state at application of a discharge induction voltage at the previous time or previous times; and a machining current control unit configured to control a main discharge circuit so as to supply the normal machining current to the discharge gap when the present discharge gap state is the normal state, control the main discharge circuit so as to supply a short-circuit machining current smaller than a predetermined current to the gap when the discharge gap state is the short-circuited state, and control the main discharge circuit so as not to supply any machining current to the gap when the discharge gap state is the open state.

A method for electroerosion machining includes providing an electrode assembly comprising an electrode body having a tube-shaped body that defines a hollow interior and one or more inserts affixed to the electrode body to form a cutting surface on the electrode assembly, positioning the electrode assembly adjacent a workpiece to be machined, and providing power to the electrode assembly so as to energize the electrode assembly, with the electrode assembly and the workpiece being at opposite electrical polarities. The method also includes advancing the electrode assembly through the workpiece, with a working gap being maintained between the inserts and the workpiece across which a pulse electric current is passed to remove material from the workpiece, wherein, upon advancing the electrode assembly through the workpiece, a core is formed that is completely separated from a remainder of the workpiece and is contained within the hollow interior of the electrode body.

A wire electric discharge machine for machining a workpiece by causing a discharge between a wire electrode delivered from a wire bobbin and the workpiece. The wire electric discharge machine includes: a remaining length calculation unit that calculates a remaining length of the wire electrode based on electrode winding coefficients, bobbin draw-out radius correlation information, and a spool diameter of the wire bobbin. The electrode winding coefficients depend on a winding density of the wire electrode, an inner width of the wire bobbin, a wire diameter of the electrode wire, and a winding tension of the wire electrode. The bobbin draw-out radius correlation information is correlated with a bobbin draw-out radius that is a distance between a position at which the wire electrode wound around the wire bobbin is separated from the wire bobbin and a central axis of rotation of the wire bobbin.