| 摘要 |
PURPOSE:To remove a strain of a wire passing through a working portion at least under moving by a tension and an electrical heating by a method wherein a working current is conducted from rollers being applied with a braking force to the wire electrode within a working gap. CONSTITUTION:A wire electrode 1 between rollers 2, 3 is moving into an arrow sign direction under tensed condition due to a braking force applied to the rollers 2 and a tension caused by the rollers 3. An electric current is flowed from an electric source 7 to the wire 1 through the rollers 2, 3 and an electric discharge and the like are effected between a work to work it, therefore, the wire electrode 1 from the rollers 2, 3 to a working portion opposing to the work 6 is heated by Joule heat generated by the flowing electric current. A strain or the like of the wire electrode passing through the working portion being moved by this heat and the above described tension may easily be removed by this constitution. |
