NEWS Center

29

2022

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06

Basic knowledge and acceptance standards of imported mining steel wire ropes

Classification:


【Summary description】Imported mining steel wire rope is a spiral shaped steel wire rope bundle formed by twisting steel wire ropes that meet the requirements of mechanical properties and geometric dimensions according to certain rules. Imported mining steel wire rope is mainly composed of steel wire, rope core, and lubricating grease. Steel wire rope first twists multiple steel wire ropes into strands, with the rope core as the center, and a certain number of strands are wound into a spiral shaped rope. In transportation machinery, imported mining steel wire rope is used for lifting, traction, tensioning, and loading, Steel wire ropes have high strength, light weight, stable operation, are not easy to suddenly break, and work reliably. So, let's learn about the basic knowledge and acceptance standards of imported mining steel wire ropes together!

Imported mining steel wire rope is a spiral shaped steel wire rope bundle formed by twisting steel wire ropes that meet the requirements of mechanical properties and geometric dimensions according to certain rules. Imported mining steel wire rope is mainly composed of steel wire, rope core, and lubricating grease. Steel wire rope first twists multiple steel wire ropes into strands, with the rope core as the center, and a certain number of strands are wound into a spiral shaped rope. In transportation machinery, imported mining steel wire rope is used for lifting, traction, tensioning, and loading, Steel wire ropes have high strength, light weight, stable operation, are not easy to suddenly break, and work reliably. So, let's learn about the basic knowledge and acceptance standards of imported mining steel wire ropes together!

Imported mining steel wire ropes are mainly composed of steel wires, rope cores, and lubricating grease.

1. Steel wire

Steel wire ropes need to be subjected to alternating loads during use, and their performance mainly depends on the mechanical properties, surface condition, and structure of the steel wire rope. The materials of steel wire include carbon steel and alloy steel, which are made by cold rolling or cold rolling. The cross-section of the steel wire is circular or irregular. Specially shaped cross-sectional steel wire is mainly used for the production of sealing ropes, with high tensile strength and toughness. It has undergone appropriate surface treatment to meet the needs of different environmental conditions.

2. Wire core

The main function of the wire rope core is to support the wire rope to achieve a stable cross-sectional structure. Rope core includes steel core and fiber core, fiber core includes natural fiber core and synthetic fiber core, sisal, jute, cotton yarn and other natural fiber core, and synthetic fiber core includes polyethylene and polypropylene filament yarn. The natural fiber core can store a lot of grease, which can lubricate the wire rope and extend the service life of the wire rope.

3. Lubricating grease

The main functions of applying lubricating grease during the twisting process of steel wire ropes are twofold: firstly, to lubricate the steel wire rope to alleviate wear on the surface of the steel wire rope; secondly, lubricating grease isolates the surface of the steel wire rope from oxygen in the air and inhibits the production of oxidation and corrosion of the steel wire rope.

Classification of imported mining steel wire ropes:

Imported mining steel wire ropes can be classified based on the material, surface condition, twisting method, and purpose of the steel wire rope used for production.

1. Classification by Material

It is made by twisting carbon steel wire ropes and high-quality carbon structural steel wire ropes as raw materials, while stainless steel wire ropes are made by twisting stainless steel wires as raw materials.

2. Classification based on surface condition

Phosphated coated steel wire (Chinese patent), abbreviated as phosphating steel wire, weighs 3-60 grams per square meter in the phosphating film of rope making steel wire. After phosphating, the pre twisted steel wire is not subjected to cold drawing processing, but directly twisted into strands, steel cores, and steel ropes. The phosphating film can improve the surface wear and corrosion resistance of the rope making steel wire, effectively suppressing the occurrence of fretting fatigue.

Galvanized steel wire includes two methods: hot-dip galvanizing and electrogalvanizing. The galvanized layer protects the steel wire with anode protection. The thicker the galvanized layer, the stronger the anti-corrosion ability.

Spray steel wire rope, and apply polyethylene, polypropylene, polyurethane, and other thickness plastics to the outer surface of the steel wire rope or the outer surface of the strand.

By cold drawing bright steel wire ropes and raw materials that have undergone heat treatment and surface preparation, the resulting wire ropes and steel wire ropes are directly twisted into strands, steel cores, and steel wire ropes without any surface treatment. 3. Classification by twisting method

Single rope, also known as single twisted rope, is made by twisting the silk wire around the center wire or hemp core, which can be twisted into single or multiple strands of steel wire.

Double stranded rope is a widely used variety of steel wire rope, which is twisted around a double stranded rope core (steel core or fiber core) and can lay one or multiple layers of steel wire.

Triple twisted rope is made by twisting two twisted ropes around the core, mainly used for thick steel ropes with a diameter of over 60mm, such as offshore steel wire ropes.

4. Classification by Status

Point contact steel wire rope: The diameter of the steel wire rope in the strand is the same, the twist between each layer of steel wire rope is the same, the lay distance is different, and the inner and outer layers of steel wire ropes intersect with each other, presenting a point contact state.

Wire contact steel wire rope: The lay distance of each layer of steel wire rope in the strand is the same, but the lay distance is different. The inner and outer layers of steel wire ropes are in contact with each other as a spiral line, in a wire contact state. When the usage conditions are the same, the service life of wire contact wire rope is longer than that of point contact wire rope.

The compacted steel wire rope was originally called surface contact steel wire rope. During the twisting process of steel wire ropes, contact surfaces are formed between them through forging, drawing, etc. Including strand rope compaction, wire rope compaction, strand double compaction, etc.

Sealed steel wire rope: The outer layer is made of special-shaped steel wire ropes, including steel wire ropes with T-shaped S-shaped and Z-shaped cross-sectional structures. The surface is smooth, with good wear resistance, and has higher tensile strength compared to other types of steel wire ropes with the same diameter. It can withstand lateral pressure, but has poor flexibility. The process route is commonly used as a load-bearing cable for steel wire ropes in cable cranes and overhead cableways.

Application and testing of imported mining steel wire ropes:

Due to the unique performance of imported mining steel wire ropes, no more ideal product has been found at home and abroad to comprehensively or replace steel wire ropes in one field. Therefore, steel wire rope has become an indispensable component or material in fields such as metallurgy, mining, oil and gas drilling, machinery, chemical industry, aerospace, etc. Its quality has also received attention from many industries in China, and a large amount of manpower and material resources have been invested in the use research and product development of steel wire rope.

Application of Imported Mining Steel Wire Rope

Before being put into production, the steel wire rope product must be inspected and accepted. The significance of this step is to accurately and truly reflect the quality status of the steel wire rope, predict the service life of the steel wire rope, avoid safety hazards, and ensure safe production. Let me briefly introduce the inspection standards for steel wire ropes.

1. Inspection items

The inspection items for steel wire ropes mainly include the following six items: shape, size, structure, surface quality, supplier inspection report, strength test, fatigue test.

2. Testing equipment

Micrometer, multimeter ETM504C microcomputer controlled electronic universal testing machine, and multimeter steel wire rope bending fatigue testing machine.

3. Acceptance criteria

Size and structural requirements: The diameter of imported mining steel wire ropes can be measured with a micrometer, and the structure can be observed with the naked eye. However, due to the different application industries and purposes of steel wire ropes, the requirements for size and structure also vary. Specific inspections should be carried out based on the actual situation, which is not uniformly described here.

The above introduction is about the basic knowledge and acceptance standards of imported mining steel wire ropes. If you need to learn more, please feel free to contact us at any time!