| 摘要 |
PURPOSE: A method for service life time of a robot cable is provided to detect a trouble on the robot cable and to prevent long time pause of a line. CONSTITUTION: A method for service life time of a robot cable comprises followings. A robot is applied(S110). The estimated fragility sites are selected by analyzing operation of the robot cable(S120). The bending stress and torque stress are calculated(S130). Von Mises stress is calculated based on bending stress and torque stress(S140). Mean stress and stress amplitude are calculated from the Von Mises stress spectrum during a cycle of the robot operation(S150). Equivalence alternating stresses are calculated from the mean stress and stress amplitude(S160). Fatigue life of the robot cable is calculated(S170).
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