Abstract
The friction and wear of flexible cables are the main factors that cause electrical breakdown and insulation aging, and they greatly reduce the reliability and safety of robots. In order to enhance the reliability and safety of the robot, it is of great necessity to investigate the friction and wear mechanisms of the flexible cable. In this research, the friction and wear mechanisms have been discussed. The effects of relative speed, ambient temperature, and positive pressure on the flexible cables are considered by an orthogonal frictional movement. The cable friction force has been measured by a piezoelectric sensor with high natural frequency characteristics. The relations among friction and different factors affecting friction have also been discussed. The results show that the relative speed and the ambient temperature are the main factors affecting the friction and wear of the cable; the main form of flexible cable wear is mechanical-force chemical friction and wear. Those discoveries will greatly deepen the understanding of the friction and wear mechanisms of flexible cables, and will be beneficial to robot cable-reliability design.
Highlights
Industrial robots can replace manual work in high-intensity environments such as high temperature and high pressure
The robot flexible cable follows the robot frequently, which causes severe insulation aging and relative sliding between two cables
Studying the friction and wear characteristics of a robot flexible cable under different working conditions is of great importance to extend the service life of a flexible cable and improve the reliability of a robotic system
Summary
Industrial robots can replace manual work in high-intensity environments such as high temperature and high pressure. Studying the friction and wear characteristics of a robot flexible cable under different working conditions is of great importance to extend the service life of a flexible cable and improve the reliability of a robotic system. More and more scholars pay attention to the research on characteristics related to a flexible cable To this end, Perier V. et al studied bridge cables under the fretting friction, and only the effects of the corrosive environment were considered. Charge trapping and de-trapping processes are present in these cable insulations [13] These results show that the safe use of flexible cables is most strongly affected by the chemical factors of the working conditions of the insulation layer. It is necessary to study friction and wear aging of the insulation layer It is necessary studyresearch the friction wear performances of flexible cables.
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