Abstract:
A method of polishing a surface of an object disposed within a gas chamber is provided. The method includes filling the gas chamber with a discharging medium to a predefined pressure, applying a voltage between an electrode and the surface, calibrating a height of the electrode relative to the surface so as to establish electrical breakdown threshold criteria, and scanning the electrode with respect to the surface so as to sequentially position the electrode over a plurality of locations on the surface, each location characterized by a surface error. When a respective location in the plurality of locations has a surface error that meets the electrical breakdown threshold criteria, electrical breakdown occurs, whereby the electrical breakdown results in a discharging pulse that polishes the surface.
Abstract:
The invention relates to an electrical discharge machine (EDM) (1) for machining a conductor element such as a metal piece, the machine comprising a cutting wire (5) that is paid out from an upstream coil (6) to a downstream reception member. The machine (1) comprises a carrier means (13) that is provided with an orifice (100) for the metal piece to pass and is equipped with guiding means (18, 18'), such as a plurality of return pulleys (18, 18') for said cutting wire (5). It further relates to an improvement of a method for electrical discharge machining. Through simple, reliable and inexpensive means, the invention allows producing tridimensional parts on conventional wire cutting machines. It also allows the EDM to increase its capacity and execution speed. Another aspect of the invention is related to a method of machining a conductor element. This method is characterized in that it comprises a step of guiding the cutting wire (5) by guiding it to multiple tangent points around of the conductor element. The multiplication of tangent points results in higher machining speeds that are directly proportional to a number of passes of the cutting wire (5).
Abstract:
A multi-wire electron discharge machine includes a first wire electrode for creating an electrical discharge between the first electrode wire and a semiconductor ingot, a second wire electrode for creating an electrical discharge between the second electrode wire and the semiconductor ingot, and a wire guide for maintaining the first wire electrode in a spaced apart and generally parallel orientation with respect to the second wire electrode across a semiconductor ingot slicing area.
Abstract:
A multi-wire electron discharge machine includes a first wire electrode for creating an electrical discharge between the first electrode wire and a semiconductor ingot, a second wire electrode for creating an electrical discharge between the second electrode wire and the semiconductor ingot, and a wire guide for maintaining the first wire electrode in a spaced apart and generally parallel orientation with respect to the second wire electrode across a semiconductor ingot slicing area.
Abstract:
The invention relates to an electrical discharge machine (EDM) (1) for machining a conductor element such as a metal piece, the machine comprising a cutting wire (5) that is paid out from an upstream coil (6) to a downstream reception member. The machine (1) comprises a carrier means (13) that is provided with an orifice (100) for the metal piece to pass and is equipped with guiding means (18, 18'), such as a plurality of return pulleys (18, 18') for said cutting wire (5). It further relates to an improvement of a method for electrical discharge machining. Through simple, reliable and inexpensive means, the invention allows producing tridimensional parts on conventional wire cutting machines. It also allows the EDM to increase its capacity and execution speed. Another aspect of the invention is related to a method of machining a conductor element. This method is characterized in that it comprises a step of guiding the cutting wire (5) by guiding it to multiple tangent points around of the conductor element. The multiplication of tangent points results in higher machining speeds that are directly proportional to a number of passes of the cutting wire (5).
Abstract:
A control method for an electrical discharge apparatus wherein the electrical discharge apparatus is for applying a machined or textured finish to the surface of an electricity conductive workpiece comprising the steps of; applying multiple voltage pulses to one or more electrodes over a predetermined time period; counting the number of voltage pulses applied; counting the number of voltage pulses applied to the or each electrode which drop to below a threshold voltage; calculating the proportion of voltage pulses applied per electrode which drop to below the threshold voltage to the number of voltage pulses applied to yield an efficiency measurement for the or each electrode; outputting the efficiency measurement for the or each electrode; and adjusting the applied voltage pulses to the or each electrode according to the efficiency measurement to compensate for irregularities occurring in the or each electrode.