Early. Multilayer Strand Wire Rope Failure Causes And The Production Process

Multi-layers steel wire rope is also called rotation-resistant rope. This kind of wire rope has good pliability and twist ability, its metal consistency is big and has big breaking force, twist force around itself is small. It usually used in mining, single rope crane, and harbour etc. long delivery lift crane.Because the equipment of stranding, the operation technic, the structure of wire rope and the using of wire rope, the multi-layers wire rope is hard to produce and often has quality problem when the wire rope used. Reference the actuality of the multi-layers wire rope' quality and research in china and abroad, and the inner-layer and outer-layer breakaway, the inner-layer come out, wire rope twist and wire rope early break., research the raw material, the technics of stranding and the structure of wire rope. It analyse the theory and method of stranding, twist moment balance, the factor that affect wire rope not lose and wire rope breaking from inner-rope break and outer wire break. From the analysis result, it suggest the detailed improvement for the operation technics and method. Through improving the structure of the wire rope, adjust stranding parameter of inner-layer and outer-layer and strand to reduce total moment. Through improve equipment of pre-transmogrification for strand, control the twisting force of different layer separate, adjust transmogrification rate of strand in different layer to insure wire rope not lose, to make the wire rope in the best spinning situation. Through intermediate frequency influence hot up, use add plastic technics in multi-layer rope production, choose raw material reasonably and use different tension wire in different layer to solve the wire rope breaking from the inner-rope early breaking and outer wire break serious. After the research about the multi-layer wire rope, and do detailed production, it improve produce technics and method and the quality of the multi-layer wire rope. Make the customer trust the multi-layer wire rope.