New High-Speed Precision Steel Core EDM Wire with New Alloy Coating (SUMISPARK Gamma)

摘要

In recent manufacturing processes for fine parts and semiconductor industries, wire electric discharging machining (EDM) is suitable for the precision machining of cemented carbide molds. Against the backdrop of customer request for processed products with higher quality, electrical discharge machining electrode wire has been expected to exhibit higher performance, such as high-speed machining, high precision, and high strength. Sumitomo (SEI) Steel Wire Corp. has developed discharge machining electrode wire "SUMISPARK Gamma." This electrode wire is coated with the new alloy γ -phase brass on the surface of the steel core. The excellent discharge characteristics and processing condition settings appropriate to the new alloy have achieved high-speed processing and high-accuracy cutting. Furthermore, with one of our core technologies (High-carbon steel wire drawing technologies), we have succeeded in increasing the strength of the steel core. These developments have made it possible to suppress breaking of the electrode wire, increase the wire tension during processing, and suppress the vibration of the wire, thereby allowing precision machining. In this paper, we describe the features and performance of SUMISPARK Gamma.