Machining control apparatus and machining control method thereof

A machining control apparatus for interrupted cutting, said interrupted cutting using a rotation tool which is provided with one or more cutting edge portions in a circumferential direction on a peripheral circumference thereof, the interrupted cutting being carried out in such a way that the rotation tool is rotated around its axis while moved relatively with respect to a workpiece, the machining control apparatus comprising:

• a rotation velocity decision process unit configured to decide a rotation velocity of the rotation tool in such a way that an amplitude of vibration of the rotation tool is decreased, based on a vibration state of the rotation tool and a vibration phase of the rotation tool when the rotation tool receives a cutting resistance force, in a case that the rotation tool vibrates due to an interrupted cutting resistance force generated in the rotation tool during the interrupted cutting;
• and
• a rotation velocity control unit configured to control the rotation velocity of the rotation tool based on the rotation velocity decided by the rotation velocity decision process unit.