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Open multi-strand wire rope

A technology of steel wire rope and steel wire, applied in the field of multi-strand steel wire rope, can solve the problems of breaking load loss, tensile strength loss, etc.

Active Publication Date: 2014-10-08
NV BEKAERT SA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The twist direction of all layers in the core strands is the same as well as that of the sheath strands, with the exception of the layer twist direction in the sheath strands made up of a combination of different directions, which results in stretch Extreme loss of strength and extreme loss of breaking load

Method used

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  • Open multi-strand wire rope
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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] Embodiment 1: the following is the first embodiment according to the present invention

[0045] Wire rope diameter D is 4.50mm

[0046] The diameter D1 of the core strand 12 is 1.615mm

[0047] (Z-twist) 3×0.265mm (center steel wire 16), twist length is 6.3mm

[0048] (Z-direction twist) +8×0.265mm (steel wire 18), the twist length is 12.5mm

[0049] (Z-direction twist) +14×0.265mm (steel wire 20), the twist length is 18mm;

[0050] alpha 2 =11.87°; α 3 =13.41°

[0051] The diameter D2 of the six peripheral strands 14 is 1.493mm;

[0052] (Z-twist) 3×0.245mm (center wire 22), twist length is 6.3mm

[0053] (Z-direction twist) +8×0.245mm (steel wire 24), the twist length is 12.5mm

[0054] (Z-direction twist) +14×0.245mm (steel wire 26), lay distance is 18mm;

[0055] alpha 2 =10.99°; α 3 =12.43°

[0056] Rope: lay length is 50mm, lay in S direction.

[0057] The ratio of D1 / D2 is 1.082. The weight of the wire rope per meter is 68.3 grams, and the breaking ...

Embodiment 2

[0080] Wire rope diameter D is 4.50mm

[0081] Core strand diameter D1 is 1.574mm

[0082] (Z-twist) 2×0.285mm (central steel wire), lay distance is 6.3mm

[0083] (Z-direction twist) +8×0.265mm (steel wire), lay length is 12.5mm

[0084] (Z-direction twist) +14×0.265mm (steel wire), the twist length is 18mm;

[0085] alpha 2 =11.85°; α 3 =13.40°

[0086] The diameter D2 of the six peripheral strands is 1.455mm;

[0087] (Z-twist) 2×0.265mm (central steel wire), lay distance is 6.3mm

[0088] (Z-twist) +8×0.245mm (steel wire), the twist length is 12.5mm

[0089] (Z-direction twist) +14×0.245mm (steel wire), the twist length is 18mm;

[0090] alpha 2 =11.02°; α 3 =12.45°

[0091] Rope: lay length is 50mm, lay in S direction.

Embodiment 3

[0093] The diameter D of the wire rope is 4.50mm

[0094] The diameter D1 of the core strand is 1.615mm

[0095] (Z-twist) 3×0.265mm (central steel wire), lay length is 6.3mm

[0096] (Z-direction twist) +8×0.265mm (steel wire), lay length is 12.5mm

[0097] (Z-direction twist) +14×0.265mm (steel wire), the twist length is 18mm;

[0098] alpha 2 =11.87°;α 3 =13.41°

[0099] The diameter D2 of the six peripheral strands is 1.455 mm;

[0100] (Z-twist) 2×0.265mm (central steel wire), lay distance is 6.3mm

[0101] (Z-twist) +8×0.245mm (steel wire), the twist length is 12.5mm

[0102] (Z-direction twist) +14×0.245mm (steel wire), the twist length is 18mm;

[0103] alpha 2 =11.02°; α 3 =12.45°

[0104] Rope: lay length is 50mm, lay in S direction.

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Abstract

A steel cord (10) adapted for the reinforcement of rubber products, comprises a core strand (12) and six peripheral strands (14) concentrically surrounding the core strand (12). Each of the core and peripheral strands (12, 14) comprises a centre of two or more centre filaments (16) and two layers of filaments surrounding the centre. The core strand (12) has a diameter D1 which is greater than the diameter D2 of the peripheral strands (14). All the filaments (18, 20) of each layer have substantially the same diameter and a radially outer layer has a twist angle which is greater than a twist angle of a radially inner layer of the same strand. Each of the strands (12, 14) in the cord is composed of no more than twenty-six filaments (16, 18, 20) being twisted together.

Description

technical field [0001] The present invention relates to multi-strand steel cords for reinforcing rubber products such as rubber crawlers and heavy tires for construction machinery and large excavator applications. Background technique [0002] Pneumatic tires for large heavy machinery used in heavy construction and earth moving operations have much higher operating loads and inflation pressures than typical trucks and light vehicles. Therefore, radial tires for large excavators require special reinforced wire ropes. [0003] Since a steel cord for reinforcing a tire is required to have a high breaking load and high fatigue resistance, a steel cord having a multi-strand structure is generally widely used. Multi-strand construction has multiple strands, each strand consisting of multiple wires twisted together. These strands are twisted together to form a wire rope. For example, steel wire ropes are known, for example with a 7×(3+9+15)+1 structure. However, the structure 7...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D07B1/06
CPCD07B1/0613D07B1/0626D07B1/0633
Inventor 程志超王鹏飞庞桓炯
Owner NV BEKAERT SA
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