The invention relates to a method and a device for electrochemically processing a material, which contains a hard phase and a binder phase. The method comprises preparing an aqueous, alkaline, complexing-agent-containing electrolyte and bringing the material to be processed into contact at least in part with the electrolyte and with a current source. In order to electrochemically oxidize the material, a pulsed electrical current is delivered to the material by means of the current source, the pulse sequence of the delivered electrical current being adjusted to the amount of the binder phase in the material to be processed. By means of the method and by means of the device, it is also possible to process materials having a high content of binder phase in such a way that matter can be removed from the material evenly (homogeneously), i.e. both from the hard phase and from the binder phase of the material.

The production of a device for holding one or more electrodes for electrical discharge machining, comprising a body having a rectilinear portion in which at least one first duct is provided for the passage of one or more electrode(s). The body further has an integral curved portion in which (at least) one second curved dielectric fluid supply duct is provided and in which is provided a curved extension of said at least one first duct. The curved extension and the second curved duct are made of ceramic, with an inner mean roughness of: Ra<2 μm.

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 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 narrow-hole electric discharge machine (100) is provided with: a pump (52) with a variable flow rate that supplies machining fluid to a pipe electrode (28); a flow rate sensor (56) provided in a pipe between the pump (52) and the pipe electrode (28), the flow rate sensor (56) being configured to detect the flow rate of the machining fluid flowing through the pipe; a storage unit (58b) that stores a set flow rate of a jet flow suitable for each cross-sectional size of a plurality of pipe electrodes (28) having different cross-sectional sizes; and a pump control unit (58a) that drives the pump (52) such that the value detected by the flow rate sensor (56) is kept at the set flow rate stored in the storage unit (58b) suitable for the cross-sectional size of the pipe electrode (28) currently attached to a main shaft (114).

A method of manufacturing an additively manufactured object includes: checking, for an additively manufactured object including a plurality of internal passages, the presence or absence of a deposit in each inner wall surface of the plurality of internal passages; and selectively removing the deposit from the internal passage in which the deposit has been detected in the checking, among the plurality of internal passages.

A compact lower guide unit that allows the electrode guide to be attached and detached more easily and reliably. Provided is a lower guide unit including a housing, an electrode guide, and a pull-up mechanism having a guide support, links, and a power cylinder. The guide support includes a biasing member and a displacement member. The biasing member can bias the displacement member, and the displacement member can be displaced between a restriction position and a release position. The links can be rotated by a force applied by the power cylinder. The electrode guide is fixed to the guide support by a biasing force of the biasing member when the displacement member is in the restriction position, and the electrode guide is released from the lower guide unit when the displacement member is displaced to the release position.

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.

The present invention provides an electrical discharge machining device comprising a first injection flow generating device and a wire electrode. The first injection flow generating device comprises an injection head having a nozzle and a flow channel communicated with the nozzle. The flow channel is utilized to guide a first flow injected from the nozzle, wherein the first flow comprises a first phase flow and a second phase flow. The wire electrode is coupled to the nozzle for receiving the first flow injected from the nozzle.

An electrode guide assembly for an EDM process includes a guide tube having a first end and a second end, a fluid feed portion, a fluid return portion, and an electrode. The guide tube has a set of at least two supporting protrusions, with the protrusions projecting radially inwardly from an inner diametral surface of the guide tube. The electrode is slidably accommodated within the guide tube, with an outer diametral surface of the electrode abutting against the set of supporting protrusions. The first end of the guide tube is in fluid communication with the second end of the guide tube to thereby provide a fluid feed channel, and the second end of the guide tube is in fluid communication with the first end of the guide tube to thereby provide a fluid return channel.