Threading characteristics of thread mill with helical interpolation motion at high cutting speed

Abstract

Internal threading was carried out using a TiSiN-based-coated thread mill with helical interpolation motion by simultaneous control of three axes on a machining center, and the machining phenomena were measured and discussed. The workpiece material was S50C. The subjects were the internal threads cut by the thread mill on pilot holes (diameter = 8.5mm), or the pilot holes and internal threads were machined simultaneously by the thread mill. The experiments were conducted under cutting conditions in which the feed rate of one blade was kept constant and the cutting speed was varied. The tool vibration was measured with a wireless tool holder system, the cutting force was measured with a piezoelectric dynamometer, and the machining characteristics in the high-speed cutting range were examined.