A method for the removal of debris (75) from an aperture (60), the aperture comprising a first aperture diameter (64) and extending along a first axis (62) over a first distance (63), the method comprising the steps of aligning a beam of energy (80) with the first axis such that the beam of energy is coaxially aligned with the aperture, the beam of energy comprising both an energy sufficient to remove the debris, and a first beam diameter (82) which is less than the first aperture diameter; and, exposing the debris to the beam of energy in order to remove the debris from the aperture.

A method and device for electrical discharge machining (EDM) a workpiece by means of a train of machining pulses. During the machining time the machining pulses are applied to the working gap between workpiece and electrode. An open voltage is first applied, and it is increased to a second open voltage level if a discharge does not occur within a waiting time d.sub.0, and further increased to a third open voltage level if a discharge does not occur within a second waiting time d.sub.1.

An average product of the actual open voltages times the partial ignition delays is computed and subtracted from the product of a reference open voltage times the total ignition delay, and the servo setpoint value is adjusted accordingly. The actual axes positions are sampled in real time and the discharge electrical parameters are adjusted accordingly. The discharge electrical parameters can be adjusted according to the duration of d0 and d1.

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 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.

The invention relates to a machining apparatus for electrochemically removing component layers of a component, having at least one electrode, which is mounted so as to be movable along at least one infeed axis, and having at least one auxiliary electrode, which is mounted so as to be movable along an auxiliary infeed axis, wherein a gap for arranging the component for electrochemically removing the component layers extends between the at least one electrode and the at least one auxiliary electrode. At least the infeed axis and a longitudinal extension direction of the gap enclose an acute angle with each other. The machining apparatus comprises at least one oscillation device (40), which is set up at least to move the at least one electrode in an oscillating manner along the infeed axis and relative to the at least one auxiliary electrode.

The invention relates to a machining apparatus for electrochemically removing component layers of a component, having at least one electrode, which is mounted so as to be movable along at least one infeed axis, and having at least one auxiliary electrode, which is mounted so as to be movable along an auxiliary infeed axis, wherein a gap for arranging the component for electrochemically removing the component layers extends between the at least one electrode and the at least one auxiliary electrode. At least the infeed axis and a longitudinal extension direction of the gap enclose an acute angle with each other. The machining apparatus comprises at least one oscillation device (40), which is set up at least to move the at least one electrode in an oscillating manner along the infeed axis and relative to the at least one auxiliary electrode.

A channel machining equipment and a channel machining method allow a wall of an internal curved channel in a workpiece to be conducted. A set of traction lines and guiding bodies are to support the EDM electrode and thus allow an electrode linked with the guide mechanism to substantially move in a central portion of the curved channel to optimize an EDM effect on the wall of the channel. Therefore, a precision machining process (such as grinding, EDM, and so on) can be conducted on the internal curved channel of the workpiece to make it have satisfactory wall roughness and shape precision according to predetermined standards, thereby solving the problem of failure in effectively machining the wall of the curved channel in the workpiece in the prior art.

An electrical discharge machining apparatus and an electrical discharge machining method with adjustable machining parameters comprise a carrier and an electrical discharge machining (EDM) unit. The carrier is used for placing a to-be-machined object defined with a machining target area. A discharge electrode of the electrical discharge machining (EDM) unit is used to cut the machining target area of the to-be-machined object along a first cutting direction with at least one machining parameter, the machining parameter is correspondingly adjusted when a specified parameter of the to-be-machined object changes to a first numerical value, thereby using the adjusted machining parameter to perform a second cutting step on the machining target area of the to-be-machined object. A segmented cutting technology for solving a problem that a cutting speed (mm.sup.2/min) is slowed down and a total cutting time is prolonged due to changes of the specified parameter of electrical discharge machining cutting.

An electrical discharge machining apparatus and an electrical discharge machining method with adjustable machining parameters comprise a carrier and an electrical discharge machining (EDM) unit. The carrier is used for placing a to-be-machined object defined with a machining target area. A discharge electrode of the electrical discharge machining (EDM) unit is used to cut the machining target area of the to-be-machined object along a first cutting direction with at least one machining parameter, the machining parameter is correspondingly adjusted when a specified parameter of the to-be-machined object changes to a first numerical value, thereby using the adjusted machining parameter to perform a second cutting step on the machining target area of the to-be-machined object. A segmented cutting technology for solving a problem that a cutting speed (mm.sup.2/min) is slowed down and a total cutting time is prolonged due to changes of the specified parameter of electrical discharge machining cutting.

This narrow-hole electric discharge machine (100), which performs electric discharge machining by relatively moving a narrow-hole electrode (28) attached to a main spindle (114) and a workpiece (130) attached to a table (118), comprises: a positioning guide (16) which is attached to a guide arm (142) below the main spindle, through which the narrow-hole electrode is inserted such that a lower portion of the narrow-hole electrode is movable in the direction of an axis line (CL0), and which supports the narrow-hole electrode; and a power feeder (10) which is provided at a predetermined position directly above the positioning guide of the guide arm, comes into direct contact with the narrow-hole electrode movable in the axis line direction and feeds power to the narrow-hole electrode, wherein the distance from a power feed position to the tip of the positioning guide is constant regardless of the length of the narrow-hole electrode.