SCHNEIDDRAHT-STROMZUFUEHRUNG AN EINER FUNKENEROSIONSMASCHINE

摘要

Cutting wire power supply for a spark erosion machine in which the contact surfaces of the power supply elements which completely or partially enclose the cutting wire in a contacting manner or skirt it and transmit the current consist of a sintered material made of a hard metal and a metal with high electrical conductivity such as copper or silver. The hard metal is tungsten, molybdenum, titanium, manganese, tantalum or niobium. In a preferred sintered material the proportion of tungsten is between 50 and 95%. Good results are obtained if the metal proportions consist of 70 to 80% tungsten and 20 to 30% copper.