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1 前言2 0世纪 90年代以来 ,电火花加工技术得到了迅速发展 ,在加工速度、精度、可靠性和自动化程度等方面均有很大提高 ,现已成为现代化机加工车间中不可缺少的加工设备。美国是近 1 0年来应用和研究电火花加工技术最为积极的国家之一。从 1 989年开始 ,由美国著名的《现代机
1 Foreword Since the 1990s, the EDM technology has been rapidly developed and has been greatly improved in terms of processing speed, accuracy, reliability and degree of automation. Now it has become an indispensable processing equipment in the modern machining shop . The United States has been one of the most active countries in the application and study of EDM technology in the recent 10 years. Beginning in 1989, the famous American “modern machine.”