Robot control device and plasma cutting method

A teaching-playback robot control device that controls an operation of a plasma cutting robot according to a teaching program programmed by teaching, the robot control device comprising:

• a robot control unit that controls the operation of the plasma cutting robot according to the teaching program;
• a distance calculation unit that calculates a distance between a torch attached to the plasma cutting robot and a cutting position on a cutting target;
• a posture calculation unit that calculates a posture of the torch relative to a cutting surface that contains the cutting position on the cutting target;
• and
• a correction unit that corrects at least a position of the torch in an adaptive direction orthogonal to the cutting surface on a basis of the distance calculated by the distance calculation unit and the posture calculated by the posture calculation unit, to keep a cutting distance for plasma-cutting the cutting target, wherein
• the robot control unit controls the operation of the plasma cutting robot with at least the position of the torch corrected by the correction unit.