The steel wire rope is a kind of flexible rope twisted by multi-stranded thin steel wires, and the strand is twisted by multi-layer steel wire, and then taking the rope core as the center to twist into a spiral rope by a certain number of strands. In the material handling machinery, it is used for the lifting, traction, tightening and bearing. Combined with a variety of changes in recent years, the future development trends of steel wire rope are as follows:
1. Multi-process cross-twisted strand steel wire rope will be eliminated
Multi-process cross-twisted strand steel wire rope appears to be simple, but because the layer number of steel wire strand group, when the adjacent layer number difference is more than 6, and equal wire diameter process design except the center layer wire is used, wire skipping will frequently occur in production and use, which has become one of the key problems affecting the quality of the steel wire rope.
Especially for the 4-layer steel wire strand group, the wire skipping problem is difficult to solve. The biggest drawback of multi-step cross-twisted strand steel wire rope is that early fatigue broken wire that hard to find is very easy to occur in point contact between the wire layers, at the same time, its structural features determine that its metal filling factor is not high, which directly impact on the breaking tension of steel wire rope, therefore the elimination of multi-process cross-twisted strand steel wire rope is an inevitable trend.
2. Parallel twist strand steel wire rope to be developed
The emergence of parallel twist strand steel wire rope in the technological progress of steel wire rope history has great significance. The fundamental reason is that it improves the layer and layer contact form of steel wire strand group, thus extending the service life of steel wire rope, of course, increasing the breaking strength of steel wire rope. The parallel twist strand steel wire rope is widely used in foreign steel wire rope powers.
Domestic enterprises need not only to speed up the elimination of multi-process cross-twist strand steel wire rope, but also make a breakthrough in the rope structure to solve the problem of flexibility difference of parallel twist strand steel wire rope, so as to reduce the production difficulty that can be achieved by multi-rack stranding machine.
3. Compacted strand steel wire rope to be developed
The emergence of compacted strand steel wire rope is based on the parallel twisted strand steel wire rope. It can further improve the breaking strength of steel wire rope. The compacted strand steel wire rope is the key products that top steel wire rope enterprises actively develop including Germany Diepa, Britain Bridon, Kiswire and Italy Redaelli.
Domestic enterprises: First, they study compacted strand non-anti-rotation rope, so that the rope standard is covered under the compacted strand structure as soon as possible, then the non-anti-rotation rope product came into being. Second, they study the compacted multi-strand rope, so that the rope standard covers the multi-layer strand structure as soon as possible, to shape specialized multi-strand rope industry chain.