Abstract
PROBLEM TO BE SOLVED: To solve the following problem: since abnormality monitoring during welding is carried out only by a robot control device side, the abnormality monitoring does not function when a control device itself is not normally operated.SOLUTION: An arc welding robot includes: a manipulator M; the robot control device RC outputting a welding command signal Ws on the basis of teaching; and a welding power source WP for performing welding treatment on the basis of the welding command signal Ws. The robot control device RC outputs process design information including treatment time related to the welding treatment. Further, the welding execution state is monitored on the basis of a welding state signal Wc and the process design information which are input from the welding power source WP. The welding power source WP outputs the welding state signal Wc which shows the present state of the welding treatment and the welding execution state is monitored on the basis of the process design information from the robot control device RC. By monitoring each state mutually, unexpected situation that the manipulator M stops while the welding is continued, can be prevented.
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