Steel cord with 1+N+N+N structure
A technology for structural steel and steel cords, applied in textiles and papermaking, textile cables, yarns, etc., can solve the problems of decreased fatigue performance of steel cords, affecting the service life of tires, shortening the service life of tires, etc., to improve fatigue resistance. and load capacity, improve service life, and eliminate the effect of closed gaps
Pending Publication Date: 2020-03-24
JIANGSU XINGDA STEEL TYPE CORD
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Problems solved by technology
[0003] The Chinese patent with publication number CN103485216A discloses a three-layer steel cord with a 4+10+16 structure, and the Chinese patent with publication number CN206768318U discloses a steel cord for an all-steel radial tire carcass. These existing patents Among them, because the core strand is quadrilateral, the glue penetration of the steel cord is poor, and it is especially difficult to penetrate the rubber into the inner layer of the steel cord core strand. tire life cycle
[0004] The existing engineering tire cord structures mainly include 3+6, 3+9+15+W, 7×7+W and other structures. Due to the point contact between the monofilaments, the fatigue performance of the steel cord decreases, which affects the tire. service life
Method used
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Embodiment
[0033] This embodiment provides a 1+N+N+N structural steel cord, the cross-sectional structure of which is as follows figure 2 Its specific parameters are shown in Table 1.
[0034] Steel cord 1+6+11+11 0.23+6×0.20+11×0.205+11×0.35ST Cord diameter ±5%mm 1.75 twist direction S / S / S(Z / Z / Z) structure type line contact Lay distance ±5%mm 10 / 17 / 20 Minimum breaking force / N 4900 Linear density±5%g / m 13.69
[0035] Table 1
[0036] In this embodiment, on the basis of the original electroplating process, copper-plated steel wire with a tensile strength of 1350±50MP is selected, and the compression rate of the wet drawing chain is ≥95%, and the core wire is produced in DTU / DTS / DTA, DTA / XD-16 / GGZ18 produces cords. If the customer needs steel cord with outer winding wire, the outer winding wire is wound on the MV2 outer winding machine, and the twist direction of the outer winding wire is opposite to that of the outermost cord.
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Abstract
The invention discloses a steel cord with a 1+N+N+N structure. The steel cord comprises a central layer, a middle layer and an outer layer, wherein the central layer is composed of a steel wire with the diameter being 1 and N steel wires with the diameter being 2, in the middle layer, N steel wires with the diameter being 3 wind around the central layer, and in the outer layer, N steel wires withthe diameter being 4 wind around the middle layer; and in the central layer, the gaps between the adjacent wires on the same layer are not smaller than 20 [mu] m, and in the middle layer and the outerlayer, the gaps between the adjacent wires on the same layer are not smaller than 25 [mu] m. The steel cord has an open structure, the steel wires are in linear contact, then the rubber permeation and breaking force of the steel wire cord are greatly improved, the fatigue resistance and the loading performance of the steel wire cord are improved, thus the adaptability of a tire under the road condition in the severe environment is good, and further, the service life of the tire is prolonged.
Description
technical field [0001] The invention relates to a steel cord for an all-steel truck radial tire, an engineering vehicle radial tire carcass and a rubber protective reinforcement layer, in particular to a 1+N+N+N structural steel cord. Background technique [0002] Engineering radial tires are generally applicable to mines and large-scale engineering construction projects. The belt layer is the main force-bearing part of the radial tire, and the belt layer is used to withstand periodic tensile, bending and shearing deformation stresses. The belt layer plays an important role in the safety, comfort, high-speed performance and durability of the tire. Although these properties are related to the cutting angle, width and cord density of the belt layer, the performance relationship with the steel cord is more important. close. Only when steel cords for belts have high strength, high glue penetration and fatigue resistance can they help to improve the performance of the belt and ...
Claims
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Patent Timeline
Login to View More IPC IPC(8): D02G3/48D02G3/02D02G3/36D02G3/26
CPCD02G3/02D02G3/26D02G3/36D02G3/48D10B2101/20D07B1/0633D07B2201/2029D07B2201/2031D07B2201/2037
Inventor 张正裕马卫铭潘振国刘湘慧
Owner JIANGSU XINGDA STEEL TYPE CORD