THREADING METHOD AND MACHINE TOOL

摘要

PROBLEM TO BE SOLVED: To provide a threading method which achieves shortening of a threading time by shortening a threading cycle time, and also to provide a machine tool.;SOLUTION: Threading in the peripheral surface of a workpiece 21 is carried out by successively moving a tool 24 to a machining starting position P1 corresponding to the peripheral surface of the workpiece 21, to a machining feeding starting position P2, to a machining feeding completion position P3, and to a threading receding position P4 while the workpiece 21 is rotated about an axis. In the process of the threading, when the motion of the tool 24 is converted at the machining feeding starting position P2, at the machining feeding completion position P3, and at the threading receding position P4, motions of the tool 24 in a Z-axis direction and in an X-axis direction are simultaneously carried out.;COPYRIGHT: (C)2008,JPO&INPIT