CN212670123U - Steel wire cord for 1+ 7-ply radial tire - Google Patents
Steel wire cord for 1+ 7-ply radial tire Download PDFInfo
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- CN212670123U CN212670123U CN202020662538.XU CN202020662538U CN212670123U CN 212670123 U CN212670123 U CN 212670123U CN 202020662538 U CN202020662538 U CN 202020662538U CN 212670123 U CN212670123 U CN 212670123U
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Abstract
The utility model discloses a 1+7 strand steel wire cord for radial tire, including core strand steel wire and outer strand steel wire, outer strand steel wire locates the outside of core strand steel wire along the circumferencial direction, core strand steel wire includes that at least three core strand first layer steel wires and at least nine core strand second layer steel wires are woven and twisted together to form, outer strand steel wire includes that at least one outer strand first layer steel wire and at least six outer strand second layer steel wires are woven and twisted together to form; the utility model discloses clearance between the seven outer strand steel wires is great, is favorable to rubber fully to permeate core strand steel wire, has avoided leading to the point contact friction between each layer steel wire because of not permeating sufficient rubber, and then has avoided the problem that steel cord bearing capacity became invalid because of wearing and tearing.
Description
Technical Field
The utility model relates to a 1+7 strand steel cord for radial tire belongs to steel cord technical field.
Background
The steel cord is an important component in a radial engineering tire framework material, is formed by weaving and twisting a 7 multiplied by d +0.15HT structure steel cord commonly used by radial engineering tires, and is formed by a 7 multiplied by d core strand, six 7 multiplied by d outer layer strands and a 0.15mm outer winding wire, wherein the core strand and the outer layer strands are of the same structure, the diameters of steel wires are the same, the 7 multiplied by d structure twisting direction is S, the twisting pitch is 12.5mm, the six outer layer strands are Z, the twisting pitch is 20.0mm, the outer winding wire twisting direction is S, the twisting pitch is 5.0mm, the strands are arranged compactly, the gap between the outer layer strands is small, and rubber cannot effectively permeate into the core strand steel cord so that the air content in the cord is high. The structure of the steel cord and the strength, bending stiffness and adhesive property with rubber thereof have direct influence on the tire, and the defects caused by unreasonable structural design cannot be completely compensated only by controlling the production process of the steel cord. During the use of the radial tire, the problem of the failure of the bearing capacity of the cord is easily caused by the insufficient strength of the steel wire cord or the corrosion and abrasion of the steel wire.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a 1+7 strand steel cord for radial tire to solve prior art steel cord intensity not enough, the clearance is little between the outer strand, and rubber can not effectively permeate core strand steel wire and cause the higher defect of cord inside air content.
The utility model provides a 1+7 strand steel cord for radial tire, includes core thigh strand wire steel wire and outer strand wire steel wire, outer strand wire steel wire is located along the circumferencial direction the outside of core thigh strand wire steel wire, core thigh strand wire steel wire includes that three piece at least core thigh first layer steel wires and nine piece at least core thigh second floor steel wires are compiled and are twisted with fingers and form, outer strand wire steel wire includes that at least one outer strand first layer steel wire and six at least outer strand second floor steel wires are compiled and are twisted with fingers and form.
Preferably, the outer layer strand steel wires are at least provided with seven groups, the outer layer strand steel wires are twisted along the core strand steel wires to form at least seven outer layer strand steel wires which are uniformly twisted on one core strand steel wire.
Preferably, the diameter of the first layer of steel filaments of the core strand is the same as the diameter of the first layer of steel filaments of the outer layer strand.
Preferably, the diameter of the first layer of steel wires of the core strand and the diameter of the first layer of steel wires of the outer layer strand are in the range of 0.165-0.38 mm.
Preferably, the core strand steel filaments are twisted in the opposite direction to the steel filaments in the outer layer strand steel filaments.
Preferably, the second layer of steel wires of the core strand has the same lay length as the second layer of steel wires of the outer layer strand.
Preferably, the lay length of the first layer of steel wires of the core strand is 0.5 times of the lay length of the first layer of steel wires of the outer layer strand.
Preferably, the outer ply first layer steel wires are free of braid.
Compared with the prior art, the utility model discloses the beneficial effect who reaches: (1) the utility model has larger gaps among the seven strands of outer strand steel wires, is beneficial to the rubber to fully permeate into the core strand steel wires, avoids point contact friction among the steel wires at each layer because of not permeating enough rubber, and further avoids the problem that the bearing capacity of the steel cord is invalid due to abrasion;
(2) the utility model discloses improve anticorrosive, fatigue-resistant, shock resistance and the bonding retentivity of tire, improved the life of tire.
Drawings
FIG. 1 is a schematic cross-sectional view of a steel cord for a multi-ply radial tire according to the present invention;
fig. 2 is a schematic cross-sectional view of a steel cord commonly used in the prior art.
In the figure: 1. a core strand first layer of steel filaments; 2. a core strand second layer of steel filaments; 3. core strand steel wire; 5. outer ply strand wire; 7. the outer layer strands form first layer steel wires; 8. the outer ply is the second layer of steel filaments.
Detailed Description
The present invention will be further described with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and the protection scope of the present invention is not limited thereby.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art through specific situations.
As shown in fig. 1, a steel cord for a 1+7 ply radial tire is formed by twisting a core strand steel wire 3 and seven outer strand steel wires 5, the cross section of the steel cord is circular, the seven outer strand steel wires 5 are twisted around the core strand steel wire 3, and a structure that the seven outer strand steel wires 5 are uniformly twisted around the core strand steel wire 3 is formed. The core strand steel wire 3 is formed by weaving and twisting three core strand first layer steel wires 1 and nine core strand second layer steel wires 2, and the nine core strand second layer steel wires 2 are woven and twisted around the three core strand first layer steel wires 1; the outer layer strand steel wire 5 is formed by weaving and twisting an outer layer strand first layer steel wire 7 and six outer layer strand second layer steel wires 8; the diameter of the first layer of steel wires 1 of the core strand is the same as that of the first layer of steel wires 7 of the outer layer strand, and the diameter range is 0.165-0.38 mm. The twisting directions of the steel wires in the core strand steel wire 3 and the outer layer strand steel wire 5 are opposite; the second layer of steel wire 2 of core thigh is the same with 8 lay lengths of outer layer thigh second layer steel wire, and the lay length of the first layer of steel wire 1 of core thigh is 0.5 times of the lay length of the first layer of steel wire 7 of outer layer thigh, and first layer steel wire a1 does not have the weaving and twisting in the outer layer thigh steel wire 5.
The utility model discloses a change steel cord's structure, compensate because of the unreasonable defect that brings of steel cord structural design, improve steel cord's intensity and glue permeability, shock resistance and fatigue resistance ability, reduce the air content between tire steel cord strand and the thigh, improve the life of tire cord fabric intensity level and tire.
In the present embodiment, the strength grades of the steel wires in the core strand steel wire 3 and the outer layer strand steel wire 5 are normal strength NT, high strength HT, ultra-high strength ST, ultra-high strength UT, or ultra-high strength MT; the utility model is suitable for a steel wire to the different intensity grades of normal strength NT, high strength HT, superhigh strength ST, extra-high strength UT or high strength MT is compiled and is twisted with fingers, can improve the intensity requirement, the glue permeability performance and shock resistance, the fatigue resistance ability of compiling the steel cord that twists with fingers the formation.
The first embodiment is as follows:
the diameter d1 of the steel wire in the core strand steel wire 3 is the same as the diameter d2 of the steel wire in the outer layer strand steel wire 5 in the embodiment, and the diameters of the steel wires in the first layer of the core strand steel wire 1, the second layer of the core strand steel wire 2 and the outer layer strand steel wire 5 in the core strand steel wire 3 are all 0.22 mm. The twisting pitch of the first layer of steel wires 1 of the core strand is 6.3mm, the twisting pitch of the second layer of steel wires 2 of the core strand is 12.5mm, and the twisting pitch of the second layer of steel wires 8 of the outer layer strand is 12.5 mm. The core strand steel wire 3 and the outer layer strand steel wire 5 adopt different twisting directions, the twisting direction of the core strand steel wire 3 is Z twisting, the twisting direction of the outer layer strand steel wire 5 is S twisting, and the cord thread twisting direction is Z twisting.
Table 1 shows the comparison table of the performance indexes of the 7 × 7 × 0.25+0.15HT steel cord commonly used in radial tires in the prior art and the embodiment of the present invention:
TABLE 1
FIG. 2 is a schematic cross-sectional view of a 7 × 7 × D +0.15 structural steel cord commonly used in the prior art, and it can be seen from FIG. 1, FIG. 2 and Table 1 that the diameter of the 7 × 7 × 0.25+0.15HT structural steel cord is 2.52mm, the second layer of steel wires in the core strand steel wire D1 and the second layer of steel wires in the outer strand steel wire D2 are S-twisted, the six outer strand steel wires are Z-twisted, the twist direction of the outer winding steel wire D3 is S-twisted, the twist distances of the second layer of steel wires in the core strand steel wire D1 and the outer strand steel wire D2 are both 12.5mm, the twist distances of the six outer strand steel wires are 20.0mm, the twist distance of the outer winding steel wire D3 is 5.0mm, the breaking force is not less than 6350N, the cord diameter is 2.52mm, the breaking force/wire density is 320.7N/(/ g/m), and the adhesive force is 1650N/25 mm; the diameter of the steel cord thread of the first embodiment of the utility model is 2.20mm, the twisting direction of the core strand steel wire D1 steel wire is Z twisting, the twisting pitch is 6.3/12.5mm, the outer strand steel wire D2 steel wire is S twisting, the twisting pitch is 12.5mm, the twisting pitch of the seven outer strand steel wires is 22.0mm, the breaking force is not less than 6550N, the breaking force/linear density is 351.2N/(mm), and the adhesive force is not less than 1700N/25 mm; compared with the prior art, the embodiment of the utility model provides an adopt the steel wire strand of super high strength grade, improve steel wire cord intensity, ooze gluey rate and fatigue resistance ability through increasing strand quantity.
Example two:
in the embodiment, the diameter d1 of the steel wire in the core strand steel wire 3 is the same as the diameter d2 of the steel wire in the outer strand steel wire 5, and the diameters of the steel wires in the first layer of the core strand steel wire 1, the second layer of the core strand steel wire 2 and the outer strand steel wire 5 in the core strand steel wire 3 are all 0.22 mm; the twisting pitch of the first layer of steel wires 1 of the core strand is 6.3mm, the twisting pitch of the second layer of steel wires 2 of the core strand is 12.5mm, and the twisting pitch of the second layer of steel wires of the outer layer strand is 12.5 mm. The core strand steel wire 3 and the outer layer strand steel wire 5 adopt different twisting directions, the twisting direction of the core strand steel wire 3 is Z twisting, the twisting direction of the outer layer strand steel wire 5 is S twisting, and the cord twisting direction is Z twisting, and the steel cord structure of the embodiment 3+9 multiplied by 0.22+7 multiplied by 0.22 is used for the steel cord for the radial tire reinforcement of the engineering vehicle.
Table 2 shows the comparison table of the performance indexes of the 7 × 7 × 0.22+0.15HT steel cord commonly used for radial tires in the prior art and the embodiment of the present invention:
TABLE 2
FIG. 2 is a schematic cross-sectional view of a 7 × 7 × D +0.15 structural steel cord commonly used in the prior art, and as can be seen from FIG. 1, FIG. 2 and Table 1, the diameter of the 7 × 7 × 0.22+0.15HT structural steel cord is 2.24mm, the second layer of steel wires in the core strand steel wires D1 and the second layer of steel wires in the outer strand steel wires D2 are S-twisted, the six outer strand steel wires are Z-twisted, the twist direction of the outer wrap steel wire D3 is S-twisted, the twist distances of the second layer of steel wires in the core strand steel wires D1 and the outer strand steel wires D2 are both 12.5mm, the twist distances of the six outer strand steel wires are 20.0mm, the twist distance of the outer wrap steel wire D3 is 5.0mm, the breaking force is not less than 5120N, the cord diameter is 2.24mm, the breaking force/linear density is 336.8N/(/ g/m), and the adhesive force is not less than 1550N/25 mm; the diameter of the steel cord thread of the first embodiment of the utility model is 2.20mm, the twisting direction of the core strand steel wire D1 steel wire is Z twisting, the twisting pitch is 6.3/12.5mm, the outer strand steel wire D2 steel wire is S twisting, the twisting pitch is 12.5mm, the twisting pitch of the seven outer strand steel wires is 22.0mm, the breaking force is not less than 6550N, the breaking force/linear density is 351.2N/(mm), and the adhesive force is not less than 1700N/25 mm; compared with the prior art, the embodiment of the utility model provides an adopt the steel wire strand of super high strength grade, improve steel wire cord intensity, ooze gluey rate and fatigue resistance ability through increasing strand quantity.
Can find out through the contrast above, when the radial tire of preparation equal density, adopt the utility model discloses the radial tire intensity of preparation improves 4 ~ 9.5% with the radial tire intensity that adopts prior art preparation, and cord oozes gluey performance and fatigue resistance can increase substantially. The utility model discloses can effectively reduce the manufacturing cost of engineering vehicle radial tire, prolong engineering vehicle radial tire's life.
The embodiments of the present invention are merely examples. According to different application occasions, the utility model discloses a 3+9 xd 1+7 x 7 xd 2 structure, steel wire in the steel wire of core strand wire D1 and the steel wire in the outer strand wire D2 can use different steel wire diameters and intensity to come the ratio, and the direction of twist divide into ZZ/S/Z or SS/Z/S.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be considered as the protection scope of the present invention.
Claims (8)
1. The utility model provides a 1+7 strand steel cord for radial tire which characterized in that, includes core thigh strand wire steel wire (3) and outer thigh strand wire steel wire (5), outer thigh strand wire steel wire (5) are located along the circumferencial direction the outside of core thigh strand wire steel wire (3), core thigh strand wire (3) are twisted with fingers including at least three core thigh first layer steel wires (1) and at least nine core thigh second layer steel wires (2) and are formed, outer thigh strand wire (5) are twisted with fingers including at least one outer thigh first layer steel wire (7) and at least six outer thigh second layer steel wires (8) and are formed.
2. A steel cord for a 1+7 ply radial tire as claimed in claim 1, wherein said outer ply strand wires (5) are provided in at least seven groups, said outer ply strand wires (5) are twisted along the core ply wires (3) to form at least seven outer ply strand wires (5) uniformly twisted on one core ply strand wire (3).
3. A steel cord for a 1+7 ply radial tire according to claim 1 characterized in that the diameter of the core strand first layer steel filaments (1) is the same as that of the outer layer strand first layer steel filaments (7).
4. A steel cord for a 1+7 ply radial tire as claimed in claim 3, wherein the diameter of the core strand first layer steel wire (1) and the outer layer strand first layer steel wire (7) is in the range of 0.165 to 0.38 mm.
5. A steel cord for a 1+7 ply radial tire as claimed in claim 1, wherein said core strand steel wires (3) are twisted in the opposite direction to the steel wires in the outer layer strand steel wires (5).
6. A steel cord for a 1+7 ply radial tire according to claim 1 characterized in that said core strand second layer steel wires (2) have the same lay length as the outer layer strand second layer steel wires (8).
7. A steel cord for a 1+7 ply radial tire according to claim 1 characterized in that the lay length of the core strand first layer steel wires (1) is 0.5 times the lay length of the outer layer strand first layer steel wires (7).
8. A steel cord for a 1+7 ply radial tire according to claim 1, characterized in that the outer ply first layer steel wires (7) are free of braid.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020662538.XU CN212670123U (en) | 2020-04-27 | 2020-04-27 | Steel wire cord for 1+ 7-ply radial tire |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202020662538.XU CN212670123U (en) | 2020-04-27 | 2020-04-27 | Steel wire cord for 1+ 7-ply radial tire |
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| CN212670123U true CN212670123U (en) | 2021-03-09 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111535062A (en) * | 2020-04-27 | 2020-08-14 | 江苏兴达钢帘线股份有限公司 | Steel wire cord for 1+ 7-ply radial tire |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111535062A (en) * | 2020-04-27 | 2020-08-14 | 江苏兴达钢帘线股份有限公司 | Steel wire cord for 1+ 7-ply radial tire |
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