Impact of Installation Method on Service Life of Robot Drag Chain Cables

To address industry pain point where the lack of clear installation standards for domestic robot cables leads to premature failure due to improper installation, taking UL 20276 3P 26 AWG robot drag chain cable as the research object, impact of three key installation factors (installation length allowance, installation space and large-gauge cable crossing, as well as fixing method and position of cable ties) on service life of the cable was systematically explored by simulating actual application scenarios and designing dynamic tests. Using operation times, maximum conductor DC resistance change rate, and sheath appearance wear degree as life evaluation indicators, multiple sets of control experiments were conducted to quantitatively analyze influence weight of each factor. Results showed that over-tight installation could lead to cable breakage, with a maximum conductor DC resistance change rate of 855%, severe sheath wear, and braiding leakage; when installation space was limited with large-gauge cable crossing, maximum conductor DC resistance change rate could rise to 101%, and the sheath was visibly worn; setting cable ties in the middle of chain track could cause cable breakage, with a maximum DC conductor resistance change rate of 212%. Based on experimental data, a scientific installation specification was proposed, which involved normal or slightly loose installation, sufficient installation space, and fastening cable ties only at both ends, providing technical support for reliable application of robot cables and significantly extending their service life.