APPARATUS FOR TESTING BENDING FATIGUE OF WIRE ROPE

摘要

PURPOSE:To perform fatigue tests at two portions simultaneously per rope by supporting both ends of a wire rope and reciprocating sheaves. CONSTITUTION:Rotation of a driving wheel 9 is converted by a coupling rod 8 into reciprocating motion of a movable mount 3 with sheaves 2a, 2b attached. A wire rope 1 rolled on the sheaves 2a, 2b is subjected to repetition of bending and stretching. Since the sheaves 2a, 2b freely rotate by themselves, they follow lateral reciprocating motion, and even when a direction is changed laterally, the wire rope 1 gives bending deformation without sliding on the sheaves 2a, 2b. Reciprocating speed of the sheaves 2a, 2b exhibits a since curve due to a crank mechanism so that smooth and rapid repetition can be done. In addition a severe test such as S-bending can be done by changing positions of the sheaves 2a, 2b. Since a part to be bent is a part to be in contact with a sheave, a single rope permits simultaneous fatigue tests on two portions.