Three wear conditions of stainless steel wire rope mesh

There are three situations of external wear, deformation wear and internal wear of stainless steel wire rope mesh.There are many types of wire rope nets, which are used in all walks of life. We have heard about many wire rope net accidents, and the cost is always tragic. Therefore, we should pay attention to the problems that often occur in the wire rope net in daily life, and repair and replace it in time.

  1. Fatigue
    The wire rope net mainly bears bending fatigue and fatigue caused by stretching, twisting and vibration during use.
    Bending fatigue
    The wire rope net repeatedly flexes up and down through the pulley or drum, and the countless times are bent, which is easy to fatigue the steel wire, and the toughness decreases, and finally leads to wire breakage. The fatigue wire break appears on the outer wire on the side where the bending degree of the strand is most severe. Usually, the appearance of fatigue broken wire means that the wire rope mesh is close to the late stage of use.
    Fatigue caused by stretching, twisting and vibration
    The principle of fatigue damage is that under the action of variable stress, the surface of the fine steel wire first forms an initial crack due to various slips, and then the crack tip is repeatedly plastically deformed under the action of shear stress, so that the crack propagates until it breaks. The broken wire caused by fatigue is generally flat, mostly appearing on the surface steel wire, and they are very regular.
  2. Wear and tear
    The wire rope mesh is in contact with other objects during operation and has relative movement, resulting in friction. Under mechanical, physical and chemical effects, the surface of the wire rope mesh is also constantly worn. Wear is the most common damage method of wire rope, which is generally divided into three situations: external wear, deformation wear and internal wear.
    External wear
    The wear caused by the contact between the peripheral of the wire rope net and the pulley groove, drum group, hook head and other surfaces during use belongs to external wear. After external wear, the rope diameter will become thinner, and the thin steel wire on the peripheral surface will be smoothed. The external wear of the wire rope mesh reduces the cross-sectional area of the wire under the load, and the breaking load of the wire rope mesh is also correspondingly reduced.
    Deformation wear
    The surface damage of the wire rope mesh caused by vibration and collision is called deformation wear, which is a local wear phenomenon. If the wire rope on the surface of the drum is hit by other objects, the crane lifting wire rope net is entangled with each other, or the rope biting phenomenon caused by the deflection of the pulley and the center of the drum will cause deformation and wear of the wire rope net. This deformation wear is deformed by local extrusion, and its wire cross-section stretches to the sides at the extrusion into a wing shape. From the outside, the width of the steel wire is extended, although the cross-sectional area of the wire rope mesh is not reduced much, but the surface material of the steel wire at the local extrusion is hardened, and it is easy to break the wire.
    Internal wear
    During use, the full load of the wire rope net when passing through the drum or pulley is pressed on one side of the wire rope, and the radius of curvature of each thin steel wire cannot be exactly the same. Due to the bending of the wire rope, the thin steel wires inside the wire rope network will interact with each other and produce slip, and the contact stress between the strands will increase, so that the steel wire between the adjacent strands will produce local indentation and deep depression.

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