Neuartige Maschinenelemente in der Fördertechnik und Logistik : Hochfeste, laufende Faserseile

Abstract

Material flow systems, conveyors and machines consist of the conveyor, main and subcomponents and basic elements such as load-carrier, break, clutch, gearwheel and drive. With regard to security the load-carrier plays a major role. The load-carrier which is most often used in cranes, lifts, cablecars, hoisting gears etc. is the steel wire rope. Here, it is differentiated between ropes which are submitted to tensile and pulsating tensile stresses and ropes which are submitted to pulsating bending stress and run over washers. The modern branch of material handling and logistics puts high requirements on the load-carriers with regard to their longevity, determination of the replacement state of wear, mass reduction in line with improved breaking resistance, abandonment of lubrication up to a coupling of the functions transmission of forces, measuring of stress, data transfer of self-control. These high requirements could not be satisfied by steel wire ropes alone. New machine elements of specific materials and with specific features have to be developed as load-carriers for material flow and logistics.

Bending Cycles and Cable Properties of Polymer Fiber Cables for Fully Constrained Cable-Driven Parallel Robots

“…The equivalent does not exist for polymer fibers [10]. There are some recent bending cycle experiments [9], but the amount of data is much less than that for steel cables.…”

“…In previous works, it is attempted to use bending cycle experiments in order to obtain an estimate for the behavior of polymer fiber ropes. These showed that the lifetime is highly dependent on the cable force, somewhat dependent on the bending diameters, and to some extent also on the cable speed [9]. An expansion on this is to investigate the behavior of polymer fiber ropes in the actual cable robot itself.…”