Machine tool

A machine tool comprising:

• a cutting tool for cutting a workpiece;
• rotating means for rotating the cutting tool and the workpiece relative to each other;
• feeding means for feeding the cutting tool and the workpiece in a predetermined machining feeding direction;
• vibrating means for reciprocatingly vibrating the cutting tool and the workpiece relative to each other;
• and amplitude control means for controlling an amplitude of the reciprocating vibration by the vibrating means, wherein:
• the cutting process is carried out by rotation of the workpiece and the cutting tool relative to each other and feeding of the cutting tool accompanied by the reciprocating vibration with said amplitude in the machining feeding direction of the cutting tool, to thereby move the cutting tool along a predetermined movement path relative to the workpiece;
• wherein the amplitude control means is configured to control the amplitude separately for each divided paths divided at predetermined coordinate positions on the moving path,
• wherein the movement path includes an interpolation path between two predetermined coordinate positions, based on a predetermined interpolation method, and
• wherein the two coordinate positions include a movement starting position and an arrival position of the cutting tool, and the amplitude control means is configured to set the amplitude to gradually decrease as the cutting tool moves to the arrival position.