Steel Wire Ropes

Steel Wire Ropes Steel wire rope, is also known as steel cable.  It is a type of rope which consists of several strands of steel wire laid (twisted) into a helix. Modern wire rope was invented by the German mining engineer Wilhelm Albert in the years between 1831 and 1834 for use in mining. It was quickly accepted because it proved superior to metal chains and ropes made of hemp which was used before. Wilhelm Albert’s first ropes consisted of three strands consisting of four wires each. Wire rope industry in India, which was founded very early, started with coconut fibre ropes, switched to jute fibre, on to ‘Manila’ ropes and then to steel ropes. With the change in the needs, the designing of the wire ropes also undergone major changes with respect to the core, overlay and the weight requirement etc. Wire rope is a machine which consists of a number of precise moving parts, designed and manufactured to bear a definite relation to one another. In fact, some wire ropes contain more moving parts than many complicated mechanisms. For example, a six strand wire rope, laid around and independent wire rope core each strand and core with 49 wires, contains a total of 343 individual wires. All these wires are to work together and move with respect to one another if the rope is to have the flexibility necessary for successful operation. Wire rope has three components (Fig 1) consisting of wires, strands and core. The basic unit of a wire rope is wire which is carefully processed and drawn from selected grades of steel to predetermined physical properties and sizes. A predetermined number of finished wires are helically laid together in a uniform geometric pattern to form a strand. The process is carried out with precision and...