| 摘要 |
PURPOSE:To prevent the wire from making small kinds and to improve electric discharge machining properties, by regularly winding or rewinding a finish- elongated electric discharge machining wire coated with zinc or zinc alloy. CONSTITUTION:Although an electric discharge machining electrode wire consisting of a metal core of braze or the like with a diameter of 0.3mm. or less and zinc or zinc alloy coating the surface of the core and having a thickness of 10mu or more is excellent in electric discharge machining properties, the wire is likely to make small kinks due to the crossing of the wire in its winding around a bobbin because the wire is soft. The small kinks would have an eccentricity of as small as about 1.8mu in the period of 30 to 50mm. but exert an adverse effect on the speed and accuracy of electric discharge machining. After the finish- elongation of the electrode wire 1, it is regularly wound or/and rewound on a bobbin 2 to prevent the wire from making the small kinks. |
