| 摘要 |
PCT No. PCT/JP80/00150 Sec. 371 Date Mar. 2, 1981 Sec. 102(e) Date Feb. 20, 1981 PCT Filed Jun. 30, 1980 PCT Pub. No. WO81/00073 PCT Pub. Date Jan. 22, 1981.A method for rotating a workpiece at a constant peripheral speed when the workpiece is cut as on a lathe. Before a cutting tool is moved to a cutting position under a rapid-advance command, the number n of RPM for the spindle is computed from the following equation, based on the distance x between the cutting position and the axis of the spindle and based on the commanded periphery speed V for driving the spindle at the computed number of RPM thereof: n=V/2 x Accordingly, the actual peripheral speed of the spindle becomes the same as or approximates the commanded peripheral speed when the cutting tool reaches the cutting position.
|
