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随着现代宇航、原子工业的发展,高强度合金得到日益广泛的应用。由于这类合金的切削加工性一般都较差,用普通材料的刀具切削时,生产率和刀具的耐用度都较低,甚至无法加工。所以人们一直在寻找各种途径来提高加工这类合金的生产率和刀具耐用度。近年来,继机夹刀具之后,以自回转刀具加工难切削材料的研究,引起了人们的普遍重视,并已在车、刨、铣削加工的某些工序中得到了应用,取得了良好的效果。如据报导,采用图1所示的以环形刀片内锥面为前刀面的自回转车刀,加工高温合金(?)661(?)787时,切削速度比用普通车刀加工分别提高2倍和7倍。而用图2所示的以环形刀片外锥面为前刀面的自回转车刀,加工合金结构钢、耐热钢等材料时,切削用量达到v=300～400m/min、f=0.5～1mm/r、
With the development of modern aerospace and atomic industry, high-strength alloys are increasingly used. Due to the generally poor machinability of these alloys, productivity and tool durability are low and can not even be machined when cutting with common materials. So people have been looking for ways to improve the productivity and tool durability of such alloys. In recent years, following the folder cutter, the self-turning tool processing difficult to cut material research has aroused widespread concern and has been in the car, planing, milling process has been applied in some processes, and achieved good results . It has been reported that when the high temperature alloy (?) 661 (?) 787 is machined using a self-turning turning tool having an inner conical surface as a rake face shown in Fig. 1, the cutting speed is increased by 2 Times and 7 times. However, when using the self-turning turning tool with the outer conical surface of the annular blade as a rake face, processing alloy structural steel and heat-resisting steel as shown in FIG. 2, the cutting amount reaches v = 300-400 m / min and f = 1mm / r,