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Key points of wire rope design
Release time:
2018-10-23 15:48
The design of wire rope includes structural design, mechanical performance design, friction performance design and anti-corrosion design. The structural design is mainly to calculate the wire matching of the wire rope and determine the twisting parameters; the mechanical performance design is to ensure that the breaking tension of the whole rope meets the requirements, and the friction performance design and anti-corrosion design are to ensure the wear resistance and corrosion resistance of the wire rope, so as to resist the damage caused by the use environment to the wire rope and ensure that the service life of the wire rope meets the user requirements. Below, the editor of Xianji.com will introduce the design points of wire rope.
The primary purpose of wire rope design is to ensure its performance and extend its service life as much as possible, and to suppress and delay the occurrence of fretting fatigue or corrosion fatigue through technical measures.
The basic principles for designing wire rope are full of circular cross section, low wear rate of wire surface, slow initiation and expansion rate of microcracks, low corrosion rate, moderate flexibility, concentric layer retaining a certain gap and high production efficiency. When designing the structure of the wire rope, the circular cross-section wire is filled as the basic principle, and the density coefficient of the wire rope is increased as much as possible to ensure that the wire rope can withstand the greatest possible tension and give full play to the mechanical properties of the wire rope.
In order to achieve the purpose of low wear rate on the surface of the wire, specific measures that can be taken include selecting grease suitable for the use environment, coating materials that can protect the surface of the wire, and matching the hardness of the contacting wires. Among them, coating technology is an important technical means to prevent the micro-wear of the wire. The coating material should be firmly combined with the wire matrix, wear-resistant and corrosion-resistant. The coating only needs a relatively thin thickness to achieve the ideal protection effect. The breaking tension of the wire rope cannot be reduced due to the use of the coating material. The coating material must be able to bend and deform to a certain extent with the wire, and cannot fall off from the wire matrix during repeated bending and deformation.
Coating is the development direction of wire rope manufacturing technology. Coated wire rope is an upgraded product of smooth wire rope. As far as the actual situation of the current steel wire rope manufacturing industry is concerned, manganese phosphating coated steel wire rope has the best fatigue resistance among the steel wire ropes with the same structure, and its fatigue life far exceeds that of smooth steel wire rope. Coated steel wire rope is an upgraded product of smooth steel wire rope. The point-line composite structure is not only applicable to the strand rope structure, but also to the steel wire rope structure. The steel wire rope twisting equipment will develop in the direction of large-scale and composite according to the needs.
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