Thermocompact

Commissariat a L'energie Atomique Et Aux Energies Alternatives

Centre National De La Recherche Scientifique

Agie Charmilles Sa

Michel Ly

Gérald Sanchez

Gerald Sanchez

Blanche Ouvrard

Xavier Weber

Sophie Rivoirard

Gilles Mollard

Philippe Descaillot

Arnaud Griffond

Patrick Blanc

Ludovic Lafleur

According to the invention, the electrode wire () for electric discharge machining comprises a metal core (), in one or more layers of metal or metal alloy. On the metal core (), a coating () having an alloy different from that of the metal core () contains more than 50 wt % zinc. The coating () comprises copper-zinc alloy () of fractured γ phase, and covers the majority of the metal core (). The coating () contains covered pores () larger than 2 μm.

Electrode lead with a porous layer for electrical discharge machining

An electrode wire for electroerosion machining, the electrode wire including a metal core, made of one or more layers of metal or metal alloy. On the metal core there is a coating having an alloy different from that of the metal core, and containing more than 50% by weight of zinc. The coating includes delta-phase copper-zinc alloy.

Delta-phase brass electrode wire for electroerosion machining, and method for manufacturing same

A device for machining a part by electrical discharge machining using an electrode wire. The device includes equipment for holding the electrode wire taut and driving the wire to translate longitudinally, in proximity to the part to be machined, in a sparking zone. The device further includes equipment for making a stream of dielectric liquid flow through the sparking zone between the electrode wire and the part to be machined. An electrical power source generates electrical pulses that cause sparks in the sparking zone between the electrode wire and the part to be machined. The quantity of gas bubbles present in the sparking zone is measured, and a signal is produced, representative of the quantity of bubbles, the signal being delivered to a controller. The controller modifies machining parameters so as to maintain the value of the signal within a suitable range.

Process and device for preventing breakage of electrode wire during machining by spark erosion

A device for identifying a spark-erosion wire conditioned on a coil includes a radio tag, rigidly connected to the coil and accessible for reading data that it supports, identification data of the wire, supported by the radio tag, a data-reading device, associated with a wire spark-erosion machine, capable of reading the identification data supported by the radio tag of the coil, and capable of transmitting the identification data to the wire spark-erosion machine, an acquisition device for generating and recording over time as identification data, in the radio tag, historical data selected from the group that consists of historical usage data describing usage conditions of the wire supported by the coil and historical constraint data describing physical constraints to which the wire supported by the coil is subjected.

Method and device for identifying a spark-erosion wire on a coil, and application to machining by a wire spark-erosion machine

An abrasive wire including a steel core and a coating including a binder and abrasive particles, the binder being formed by at least one iron alloy layer containing, by weight percent in relation to the weight of the binder: between 0 and 3% oxygen, advantageously between 0 and 2%; and between 0.3% and 9% of at least one element selected from the group including carbon, boron an phosphorous.

Abrasive sawing wire, production method thereof and use of same

An abrasive wire including a steel core and an outer coating including a binder and abrasive particles, the binder being formed by at least one nickel-cobalt alloy layer having a cobalt content of between 20 wt.-% and 85 wt.-% in relation to the weight of the Ni/Co alloy.

A process for manufacturing an abrasive wire formed by abrasive particles held on a central core by a binder comprises depositing abrasive particles on the central core, each particle comprising a magnetic material that has a relative permeability greater than 50 and that represents at least 1% of the volume of the abrasive particle, and depositing binder on the central core to keep the abrasive particles attached to it. The core has south poles and north poles alternating along either its circumference or its length.

Process and apparatus for manufacturing an abrasive wire

The invention concerns an electrode wire comprising a metal core coated with a zinc surface cladding whereof the thickness ranges between 2 and 4 &#x3bc;m, thereby providing a better compromise between machining speed, precision of workpieces and surface condition of the machined workpieces.

Electric discharge machining wire with optimized surface coating

The invention relates to a wire () which comprises a copper or pinchbeck core () surrounded by a pinchbeck coating consisting of a continuous pinchbeck sub-layer () in phase &#x3b2; and a superficial layer () with a fractured pinchbeck structure in phase ? enabling the appearance of pinchbeck in phase &#x3b2; in the fractures (). In this way, the electrical discharge machining speed is essentially increased.

Composite wire for electrical discharge machining

The electrode wire according to the invention comprises a brass core () covered with a &#x3b3; phase brass coating () having a structure fragmented into blocks () between which the core () is exposed. The blocks () have a thickness (E) with a narrow distribution and produce a coverage of the core () according to a coverage rate greater than 50%. This produces a regular fragmentation of the coating, which improves the finish state of the machined parts.

Electrode wire for spark erosion

The invention concerns an electrode wire comprising an unalloyed copper core coated with a diffused zinc alloy coating layer, whereof the thickness is more than 10% of the wire diameter. The coating layer is optionally plated with a thin zinc, copper, nickel, silver or gold surface contact film. Such a wire achieves higher electrical discharge machining speed.

Growing community of inventors

Annecy, France

Michel Ly