An electrochemical well pipe cutting instrument, applicable in particular for cutting any type of pipes accessing underground works with conductive fluid inside, includes at least one device for ensuring electrical continuity and at least one electrode. The instrument also includes at least one device for ensuring mechanical fixation of the instrument in the pipe such as an anchor. The device for ensuring electrical continuity, the anchor and electrode can be adjusted in length to suit different diameters of pipe within a large range. Optionally the electrodes are located on a rotary device. The instrument is connected to a main instrument body which includes an electronic module, at least one centralizer and a CCL module with an inclinometer. The main instrument body is connected to a cable head which ensures the communication to a surface unit.

A machining position correcting device is applied to an electrochemical machining device that makes an electrolyte flow out of a distal end part of an electrode bar extending along an axis while rotating the electrode bar about the axis to electrochemically machine a material to be machined in a region from the distal end part of the electrode bar. The machining position correcting device includes a position detector configured to detect a rotational position of a feature point provided to the electrode bar.

Electrode for an electro-erosion process, includes a shaft, a body coupled to the shaft, a plurality of machining-inserts, an insulated layer, and a flushing cover disposed on the body and coupled to the shaft. The shaft includes a channel, a plurality of first openings and second openings, where each opening is connected to the channel. The body includes a plurality of main-flushing channels, where each channel is connected to a corresponding first opening. The plurality of machining-inserts is spaced apart from each other along a circumferential direction and detachably coupled to a peripheral end portion of the body. Each machining-insert includes at least one third opening connected to a corresponding main-flushing channel. The insulated layer is disposed on top and bottom surfaces of the body. The flushing cover includes a plurality of side-flushing channels and a plurality of fourth openings, where each channel is connected to a corresponding second opening.

The present application provides an electrical discharge machining system for drilling a hole in a workpiece using a flushing fluid. The electrical discharge machining system may include an electrode with the electrode positioned in an electrode guide, and an integrated external flushing system. The integrated external flushing system may include a guide cap and a concentric flushing channel defined between the guide cap and the electrode guide so as to allow the flushing fluid to remain attached to the electrode guide.

Electrode for an electro-erosion process, includes a shaft, a body coupled to the shaft, a plurality of machining-inserts, an insulated layer, and a flushing cover disposed on the body and coupled to the shaft. The shaft includes a channel, a plurality of first openings and second openings, each opening connected to the channel. The body includes a plurality of main-flushing channels, where each channel is connected to a corresponding first opening. The plurality of machining-inserts is spaced apart from each other along a circumferential direction and detachably coupled to a peripheral end portion of the body. Each machining-insert includes at least one third opening connected to a corresponding main-flushing channel. The insulated layer is disposed on top and bottom surfaces of the body. The flushing cover includes a plurality of side-flushing channels and a plurality of fourth openings, where each channel is connected to a corresponding second opening.

A member (10), for bearing a load, including a load receiving portion (12) at which the load is applicable to the member. A strainable portion (14) is connected to the load receiving portion to be strained by the load. A datum (16a) is defined and an elongate portion (18) defines another datum (18a). The datums are arranged such that relative displacement therebetween indicates an amount by which the strainable portion is strained. The strainable portion defines the datum.

A wire electrical discharge machine includes: a supporting member for relatively moving a wire electrode relative to a measurement target; servomotors for moving the supporting member; a setting changer for changing the setting of a directive speed; and a motor controller that controls the servomotors in performing move-and-contact detection for detecting contact between the wire electrode and the measurement target by moving the two relative to each other, so that the wire electrode is moved relative to the measurement target based on the directive speed changed and specified by the setting changer.

An electromachining system includes at least one steerable electrode. The steerable electrode includes an electrode positioning mechanism configured to facilitate six degrees of freedom referenced to a pitch axis, a yaw axis, and a roll axis. The three axes are substantially perpendicular to each other. The electrode positioning mechanism includes a first end and a rotatable electrode tip coupled to the first end.

A machining apparatus is disclosed, which includes a curved outer conduit, a curved rotary electrode and a driving motor. The outer conduit has a cavity and a fluid inlet in fluid communication with the cavity. The electrode includes a flexible shaft positioned in the cavity and having a first end and a second end, and a machining head having a fluid outlet in fluid communication with the cavity and electrically connected with the first end of the flexible shaft to be powered via the flexible shaft. The motor is mechanically coupled to the second end of the flexible shaft for driving the flexible shaft to rotate. A machining system is also disclosed, which includes the machining apparatus, a power supply for powering the flexible shaft, an electrolyte supply for providing electrolyte to the fluid inlet and a machine tool onto which the outer conduit and the motor are positioned.

A method of machining a work-piece formed of titanium-based material, using a machining apparatus, is described. The method includes the steps of providing an electrically-conductive electrode contained within a spindle assembly, in a pre-selected distance and position relative to the titanium-based work-piece; while electrically powering the electrode and the work-piece with a power supply. In the process, fluid electrolyte is circulated through at least two pathways in the machining apparatusan internal conduit within the spindle assembly; and an external conduit. The charged electrode is moved relative to the work-piece in a plunging motion, to remove material from the work-piece at a relatively high rate, using a high-speed electro-erosion (HSEE) process.