| 摘要 |
PURPOSE:To enhance the speed and accuracy of machining by a wire-cut electric spark machine, by making the core of an electrode wire for the machine, from a copper alloy, and making the crust of the wire from a steel of 0.45-1.20% in carbon content. CONSTITUTION:The most preferable structure of an electrode wire is such that it comprises a core 1 located in the center of the wire and having a circular cross section, a crust 2 concentrically located around the core and having a circular cross section, and a plated layer 3 located around the crust and having a prescribed thickness. In order to maintain the tensile strength of the electrode wire, the carbon content of a steel from which the crust 2 is made is eliminated within a range of 0.45-1.20%. The percentage of the cross-sectional area of the core 1 to that of the electrode wire is set at 20-50%. The plated layer 3 is made of zinc on the peripheral surface of the crust 2. The diameter of the electrode wire is set at 0.03-0.4mm.. According to this constitution, the electrode wire is made appropriate enough to meet the need to enhance the speed and accuracy of spark erosion. |
