Importance

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Abstract

A current-conductor assembly for conducting a machining current to a wire electrode in a wire-cutting electroerosion machine comprises a pair of coplanar wheels rotatable about their respective shafts and having their respective peripheries for receiving the wire electrode between them. The wheels are urged towards one another to press the wire electrode between the peripheries and a brush connectable electrically to a source of the machining current and adapted to be urged under pressure into electrical contact with a flank of one of the wheels which is electrically conductive for conducting the current to the wire electrode. The brush is an electrically conductive body preferably composed of copper, graphite or a copper/graphits composite material containing a solid-state lubricating material, e.g. MoS.sub.2 or WS.sub.2. The pressing wheel urged towards the conducting wheel is, at least along its peripheral region, composed of an elastomeric material.

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First Claim