Abstract:
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.
Abstract:
1. A process for the electrochemical machining of an electrochemically machinable conductive metallic workpiece comprising the steps of: SPACEDLY JUXTAPOSING SAID WORKPIECE WITH AN ELECTROCHEMICALMACHINING ELECTRODE HAVING A SUPPORTING SHANK PORTION AND A MACHINING FACE PORTION TO FORM A MACHINING GAP; PROVIDING AN AQUEOUS-ELECTROLYTE COOLANT FLOW THROUGH SAID GAP; PASSING AN ELECTRICAL CURRENT ACROSS SAID GAP; PROVIDING RELATIVE MOVEMENT BETWEEN SAID ELECTRODE AND SAID WORKPIECE TO MACHINE ELECTROLYTICALLY A CAVITY IN SAID WORKPIECE; SHIELDING THE WALLS OF SAID CAVITY PROXIMATE SAID SHANK PORTION OF SAID ELECTRODE BY FORMING IN SITU IN THE COURSE OF THE ELECTROLYTIC MACHINING OF SAID CAVITY A SHEATH OF AN ELECTRICALLY INSULATING MATERIAL TO LIMIT FURTHER ELECTROLYTIC ACTION BY INTRODUCING A SUBSTANCE INTO SAID ELECTROLYTE COOLANT CAPABLE OF FORMING SAID SHEATH; AND PREVENTING FORMATION OF SAID INSULATING SHEATH ON SAID WORKPIECE PROXIMATE SAID MACHINING FACE PORTION OF SAID ELECTRODE BY PROVIDING PERIODIC SPARK DISCHARGE BETWEEN SAID ELECTRODE MACHINING FACE PORTION AND SAID WORKPIECE.
Abstract:
An electrochemical machining device includes a plurality of electrodes, a guiding member and a plate member. The electrodes are disposed around a workpiece. The guiding member is configured to limit and guide each of the electrodes to move. The plate member is configured to exert a force to each of the electrodes. The driving member is configured to rotate the workpiece. The plate member is connected to each of the electrodes. A force-exerting direction of the force from the plate member to each of the electrodes is parallel to a central axis of each of the electrodes or deflects off the central axis. Each of the electrodes is passed through the guiding member and configured to perform a machining on the workpiece which is rotated by the driving member, and each of the electrodes has an electrochemical machining direction which is perpendicular, oblique or parallel to the workpiece.
Abstract:
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 apparatus—an 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.
Abstract:
A method and a device for finishing the cut surface of a work which is cut from a metal blank by a wire cut discharge process. The work and the waste piece of the metal blank are positioned in the same condition as just after the process. Electrolyte is fed through a clearance between the work and the waste piece and, at the same time, current is caused to flow from the work to the remainder. This subjects the cut surface of the work to electrolytic treatment to thereby make it smooth while removing oxide films and degenerated surface layers therefrom.
Abstract:
In combining electrical discharge machining (EDM) and electrochemical machining (ECM) the use of a strong electrolyte has, in the invention, been found possible. In one embodiment a pulse generator applies an intermittent voltage between an electrode and a workpiece causing both EDM and ECM to take place when a strong electrolyte is interposed in the gap between the electrode and the workpiece. At the onset of arcing a discharge monitor removes the voltage. A wire-cutting machine and method combining EDM and ECM are also described.
Abstract:
A friction stir welding tool of the present invention is used for friction stir welding, and includes: a base material; and a coating layer formed on a surface of at least a portion of the base material that is to be caused to contact workpieces during friction stir welding, the base material being formed of a cemented carbide, and the coating layer containing cubic WC1-x and being formed by electrical discharge machining.
Abstract:
In an apparatus and method for magnetic field assisted electrochemical discharge machining (ECDM), the magneto hydrodynamic (MHD) effect is utilized to improve the thickness of bubble film and the electrolyte circulation so as to enhance the machining accuracy and efficiency. Since charged ions in a magnetic field are induced by Lorenz force to move, and the electrolysis bubbles generated in the ECDM process are suffused with electrification ions on their surfaces, the electrolysis bubbles can be forced to move in the direction of the magnetic field without the need of mechanical disturbance. The present invention can be widely applied in the micro-machining of non-conductive brittle materials of different dimensions and shapes, comprising the forming of microchannels and microholes on a biochip, and in the micro-opto-electro-mechanical system (MOEMS) and various kinds of micro-machining fields. The machined surface is smooth and does not require a second time machining.