Wire rope is a spiral steel wire bundle twisted together according to certain rules, which meets the requirements of mechanical properties and geometric dimensions. The wire rope consists of steel wire, core and grease. Wire rope is a kind of rope which is twisted into strands by multi-layer steel wire, then centered on the core of the rope and twisted into spiral by a certain number of strands. In material handling machinery, it is used for lifting, pulling, tightening and loading. The wire rope has the advantages of high strength, light weight, stable work, and not easy to break suddenly, so it works reliably. In 1834, Olubert, a European, invented the first wire rope in the world (smooth wire rope). Tianjin No. 1 wire rope factory, established in 1939, is the first metal product enterprise in China.
Wire rope composition
The steel wire rope needs to bear alternating loads during its use. Its performance is mainly determined by the mechanical properties of the steel wire, the surface state of the steel wire and the structure of the steel wire rope. Steel wire material includes carbon steel or alloy steel, which is made by cold drawing or cold rolling. The cross section of steel wire has circular or special shape (T-S-Z type). The special-shaped cross section steel wire is mainly used in the production of sealed steel wire rope. It has high tensile strength and toughness, and suitable surface treatment of steel wire is carried out to meet different environmental conditions. Demand.
The main function of the rope core is to support the wire rope in order to achieve a stable cross section structure. Core of rope includes steel core and fibre core, fibre core includes natural fibre core and synthetic fibre core, natural fibre core such as sisal, jute, cotton thread, synthetic fibre core includes polyethylene and polypropylene filament, etc. The natural fibre core can store more grease, lubricate the wire rope and prolong the service life of the wire rope.
There are two main functions of spraying grease in the twisting process of steel wire rope. One is to lubricate the steel wire rope to reduce the wear on the surface of steel wire. The other is to isolate the surface of steel wire from oxygen in the air and to inhibit the oxidation corrosion of steel wire rope.