MACHINE TOOL FOR MACHINING SCREW ROTOR AND METHOD OF MACHINING SCREW ROTOR USING SAME

摘要

Disclosed is a machine tool for machining screw rotors, capable of machining a large number of high-precision screw rotors having variable lead and tilt angles at low cost in a short time without requiring enormous machining workload and thereby capable of supplying a large number of screw-type vacuum pump at low cost. Also disclosed is a method of machining screw rotors using the same. Specifically, a machine tool (200) for machining screw rotors comprises a spindle (211); a headstock (210); a tool stock (220); a tool (221); a C-axis serving as the rotational axis of the spindle (211); X-, Z-, and Y-axes serving as moving directions of the tool stock (220); an A-axis for adjusting the rake angle of the tool (221) with respect to a workpiece (W) to be machined by rotating the tool (221) in accordance with the lead angle of a screw rotor (120); and a numerical control means (230). Also disclosed is a method of machining screw rotors using the same.