Tool path generation method and machine tool

A machine tool comprising a control device that generates second tool path by performing smoothing treatment on first tool path set by a first machining program, wherein

• the control device includes:
• a movement point setting part that sets a plurality of movement points based on the first tool path;
• a rate-of-change calculation part that calculates a rate of change in curvature of the first tool path at each of the movement points;
• a weight setting part that calculates a weight of moving average based on the rate of change in the curvature of the first tool path at each of the movement points;
• a movement point correction part that calculates a coordinate value of the moving average of the movement points using the weight at each of the movement points and sets the coordinate value of the moving average of the movement points as the movement points of the second tool path;
• and
• a program generation part that generates a second machining program based on the movement points of the second tool path.