CN211571181U - Seventeen-ply radial tire steel wire cord - Google Patents
Seventeen-ply radial tire steel wire cord Download PDFInfo
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- CN211571181U CN211571181U CN201922036907.4U CN201922036907U CN211571181U CN 211571181 U CN211571181 U CN 211571181U CN 201922036907 U CN201922036907 U CN 201922036907U CN 211571181 U CN211571181 U CN 211571181U
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Abstract
The utility model belongs to the technical field of steel cord, and discloses a seventeen-strand radial tire steel cord, which comprises a core strand, an intermediate layer strand and an outer layer strand, wherein the intermediate layer strand is formed by weaving and twisting six strands of steel wires around the core strand; the outer layer strands are formed by weaving and twisting ten steel wires around the middle layer strands; the diameters of the core strand, the intermediate layer strand steel wire and the outer layer strand steel wire are the same, the twisting direction of the intermediate layer strand steel wire is the same as that of the outer layer strand steel wire, and the twisting distance of the intermediate layer strand steel wire is 0.50-0.80 times of that of the outer layer strand steel wire; the cross section of the steel cord is circular. The clearance between the outer strand steel wire of seventeen strands of radial tire steel cord is great, is favorable to rubber fully to permeate intermediate level strand steel wire, has improved anticorrosive, fatigue-resistant, shock resistance and the bonding retentivity of tire, has improved the life of tire.
Description
Technical Field
The utility model belongs to the technical field of the steel cord, concretely relates to seventeen strands of radial tire steel cord.
Background
The steel cord is an important component in a framework material of a radial tire, the steel cord with a 0.22+6+12 × 0.20 structure (shown in fig. 2) commonly used for the radial tire is formed by weaving and twisting one steel wire of a core strand A1, six steel wires of a middle strand A2 and twelve steel wires of an outer strand A3, monofilaments of the outer strand A3 are arranged closely and have small gaps, and rubber cannot effectively permeate the steel wires of the middle strand A2, so that the air content in the cord is high. The structure of the steel cord, the strength, the bending stiffness and the adhesive property with rubber of the steel cord 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 radial tires, if the air content inside the cords is high, the problem of failure of the carrying capacity of the cords due to insufficient strength of the steel cords or corrosion and abrasion of the steel cords is easily caused.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a seventeen strand radial tire steel cord to solve among the prior art outer strand monofilament of steel cord and arrange inseparabler, the clearance is little, and rubber can not effectively permeate core strand steel wire and cause the higher technical problem of the inside air content of cord.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
the seventeen strands of radial tire steel wire cords are characterized by comprising a core strand, a middle layer strand and an outer layer strand, wherein the core strand consists of a strand of steel wire and is free of weaving and twisting; the middle layer strand consists of six steel wires which are twisted around the core strand; the outer layer strands are composed of ten strands of steel wires which are twisted around the middle layer strands; the diameters of the core strand steel wire, the middle layer strand steel wire and the outer layer strand steel wire are the same, the twisting direction of the middle layer strand steel wire is the same as that of the outer layer strand steel wire, and the twisting distance of the middle layer strand steel wire is 0.50-0.80 times of that of the outer layer strand steel wire; the cross section of the steel cord is circular.
Further, the diameters of the core strand steel wires, the middle layer strand steel wires and the outer layer strand steel wires are 0.165-0.38 mm.
Further, the diameters of the core strand steel wires, the middle layer strand steel wires and the outer layer strand steel wires are all 0.20 mm.
Further, the diameter of the core strand steel wire, the diameter of the middle layer strand steel wire and the diameter of the outer layer strand steel wire are all 0.225 mm.
Furthermore, the twisting directions of the steel wires of the middle layer strand and the steel wires of the outer layer strand are both Z-twisting or both S-twisting.
Furthermore, the lay length of the outer layer strand steel wires is 12.5-30.0 mm.
Furthermore, the twisting pitch of the steel wires of the middle layer strands is 10.0mm, and the twisting pitch of the steel wires of the outer layer strands is 16.0 mm.
Furthermore, the twisting pitch of the steel wires of the middle layer strands is 12.5mm, and the twisting pitch of the steel wires of the outer layer strands is 18.0 mm.
Further, the strength grades of the core strand steel wire, the middle layer strand steel wire and the outer layer strand steel wire are normal strength NT, high strength HT, ultrahigh strength ST, ultrahigh strength UT or ultrahigh strength MT.
Compared with the prior art, the utility model discloses the beneficial effect who reaches:
(1) the gap between the outer strand steel wires of the seventeen strands of radial tire steel cord of the utility model is large, which is beneficial to the rubber to fully permeate into the middle strand steel wires, thereby avoiding the point contact friction between the steel wires of each layer caused by that enough rubber is not permeated between each layer, and further avoiding the problem that the bearing capacity of the steel cord is invalid due to abrasion;
(2) seventeen strands of radial tire steel cord has improved anticorrosive, fatigue-resistant, shock resistance and the bonding retentivity of tire, has improved the life of tire.
Drawings
FIG. 1 is a schematic cross-sectional view of a seventeen radial tire steel cord provided in one embodiment of the present invention;
FIG. 2 is a schematic cross-sectional view of a 0.22+6+ 12X 0.20HT structural steel cord as commonly used in the prior art;
FIG. 3 is a schematic cross-sectional view of a seventeen radial tire steel cords provided in the second embodiment of the present invention;
fig. 4 is a schematic cross-sectional view of a 3+9+15 × 0.225HT structural steel cord commonly used in the prior art.
In the figure: 1. a1, a1 denotes the core strand; 2. a2, a2 represents the middle ply; 3. a3, a3 denotes the outer ply.
Detailed Description
The invention will be further described with reference to specific embodiments. 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.
It should be noted that, in the description of the present invention, the terms "front", "rear", "left", "right", "upper", "lower", "inner", "outer", etc. indicate the directions or positional relationships based on the directions or positional relationships shown in the drawings, and are only for convenience of description of the present invention but do not require the present invention to be constructed and operated in a specific direction, and thus, should not be construed as limiting the present invention. As used in the description of the present invention, the terms "front," "back," "left," "right," "up," "down" and "in" refer to directions in the drawings, and the terms "inner" and "outer" refer to directions toward and away from, respectively, the geometric center of a particular component.
As shown in fig. 1 and 3, a seventeen strands of radial tire steel cord is formed by twisting one core strand 1 steel wire, six steel wires of the intermediate layer strand 2 and ten steel wires of the outer layer strand 3, the cross section of the steel cord is circular, the six steel wires of the intermediate layer strand 2 are twisted around the one core strand 1 steel wire, and the ten steel wires of the outer layer strand 3 are twisted around the six steel wires of the intermediate layer strand 2. The steel wires with the same diameter are selected for the core strand 1 steel wire, the middle layer strand 2 steel wire and the outer layer strand 3 steel wire, and the diameter range of the selected steel wires is 0.165-0.38 mm. 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 oozing gluey performance and shock resistance, fatigue resistance ability, reduce steel cord air content for the tire, improve tire cord intensity level. The core strand 1 steel wire is free of twisting, the core strand 1 steel wire is embedded in the middle of the intermediate layer strand 2 six-strand steel wire, and the twisting directions of the intermediate layer strand 2 steel wire and the outer layer strand 3 steel wire are the same. The twisting pitch of the steel wires of the core strand 1 is 0.50-0.80 times of the twisting pitch of the steel wires of the outer strand 3, so that the gap between the steel wires of the outer strand 3 and the contact area between the steel wires of each layer are increased, the point contact friction between the steel wires of each layer of the steel wire cord is reduced, the problem that the bearing capacity of the cord is invalid due to point contact abrasion of the steel wires of each layer in the use process of the radial tire is solved, the rubber leakage performance, the corrosion resistance, the fatigue resistance, the impact resistance and the adhesion retention of the radial tire are improved, and the service life of the tire is prolonged.
The strength grades of the steel wires of the core strand 1, the steel wires of the middle layer strand 2 and the steel wires of the outer layer strand 3 are normal strength NT, high strength HT, ultrahigh strength ST, ultrahigh strength UT or ultrahigh 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 the shock resistance and the fatigue resistance ability of compiling the steel cord that twists with fingers the formation.
The first embodiment is as follows:
the diameters of the core strand 1 steel wire, the middle layer strand 2 steel wire and the outer layer strand 3 steel wire are all 0.20mm in the embodiment, as shown in fig. 1. The twisting pitch of the steel wires of the middle layer strand 2 is 10.0mm, and the twisting pitch of the steel wires of the outer layer strand 3 is 16.0mm, namely the twisting pitch of the steel wires of the middle layer strand 2 is 0.625 times of the twisting pitch of the steel wires of the outer layer strand 3. The steel wires of the core strand 1 are not twisted, and the steel wires of the middle layer strand 2 and the steel wires of the outer layer strand 3 adopt the same twisting direction and are Z-twisted. The steel cord 7+10 × 0.20ST structure of the present embodiment is used for a radial tire.
Table 1 shows the comparison table of the performance indexes of the 0.22+6+12 × 0.20HT steel cord used in radial tires in the prior art and the embodiment of the present invention:
TABLE 1
FIG. 2 is a cross-sectional view of a 0.22+6+12 × 0.20HT 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 0.22+6+12 × 0.20HT structural steel cord is 1.02mm, the core strand A1 steel wire is free of weaving and twisting, the middle strand A2 steel wire and the outer strand A3 steel wire are Z-twisted, the lay length of the middle strand A2 steel wire is 6.3mm, the lay length of the outer strand A3 steel wire is 12.5mm, the breaking force is not less than 1775N, the linear density is 4.86g/m, the breaking force/linear density is 365.2N/(g/m), and the adhesive force is not less than 850N/25 mm; the utility model provides a steel cord's diameter is 1.0mm, 1 steel wire of core thigh is not compiled and is twisted with fingers, 2 strand steel wires in intermediate level and the twisting direction of outer strand 3 steel wire are Z to twisting with fingers, 3 steel wires of core thigh inlay in the centre of 2 six strand steel wires in intermediate level thigh, 2 steel wire lay lengths in intermediate level thigh are 10.0mm, 3 steel wire lay lengths in outer strand are 16.0mm, breaking force is more than or equal to 1790N, linear density is 4.24g/m, breaking force/linear density is 422.1N/(g/m), the adhesive force is more than or equal to 1000N 25mm. Compared with the two, the embodiment of the utility model provides an adopt the steel wire of superhigh intensity level, core strand 1 steel wire, the diameter of 2 steel wires of intermediate level thigh and outer thigh 3 steel wires is 0.20mm, core strand 1 steel wire inlays in the centre of 2 six strand steel wires of intermediate level thigh, no plaiting article twists with fingers the lay length, the lay length of 2 steel wires of intermediate level thigh is 10.0mm, the lay length of outer thigh 3 steel wires is 16.0mm, come the linear density that reduces the steel cord line through reducing steel wire monofilament quantity and improve cord line intensity through increasing steel wire monofilament intensity, it is even to make outer thigh steel wire arrange through the stranding technology, effectively promote the rubber infiltration and improve the fatigue resistance ability of steel cord line.
Example two:
the diameters of the core strand 1 steel wire, the middle layer strand 2 steel wire and the outer layer strand 3 steel wire are all 0.225mm in the embodiment, as shown in fig. 3. The twisting pitch of the steel wires of the middle layer strand 2 is 12.5mm, and the twisting pitch of the steel wires of the outer layer strand 3 is 18.0mm, namely the twisting pitch of the steel wires of the middle layer strand 2 is 0.695 times of the twisting pitch of the steel wires of the outer layer strand 3. The steel wires of the core strand 1 are not woven and twisted, and the steel wires of the middle layer strand 2 and the steel wires of the outer layer strand 3 adopt the same twisting direction and are Z-twisted. The steel cord 7+10 × 0.225ST structure of the present embodiment is used for a radial tire.
Table 2 is the 3+9+15 × 0.225HT structure steel cord that radial tire commonly used in the prior art and the utility model discloses performance index contrast table of embodiment two:
TABLE 2
FIG. 4 is a schematic cross-sectional view of a 3+9+15 × 0.225HT structural steel cord, which is commonly used in the prior art, and as can be seen from FIG. 3, FIG. 4 and Table 2, the diameter of the 3+9+15 × 0.225HT structural steel cord is 1.39mm, the core strand a1 steel wire, the intermediate layer strand a2 steel wire and the outer layer strand a3 steel wire are all Z-twisted, the lay length of the core strand a1 steel wire is 6.3mm, the lay length of the intermediate layer strand a2 steel wire is 12.5mm, the lay length of the outer layer strand a3 steel wire is 18.0mm, the breaking force is not less than 3120N, the linear density is 8.63g/m, the breaking force/linear density is 361.5N/(g/m), and the adhesive force is not less than 1300N/25 mm; the utility model discloses the diameter of the steel cord of embodiment two is 1.12mm, core thigh 1 steel wire does not have to compile twists with fingers, intermediate level thigh 2 steel wires, the twist direction of outer thigh 3 steel wire is Z twists with fingers, core thigh 1 steel wire inlays in the centre of intermediate level thigh 2 six steel wires, intermediate level thigh 2 steel wire twist pitch is 12.5mm, outer thigh 3 steel wire twist pitch is 18.0mm, breaking force is no less than 2180N, linear density is 5.35g/m, breaking force/linear density is 407.5N/(g/m), adhesive force is no less than 1350N/25mm The strength of the cord thread is improved by increasing the strength of the single filament, the outer layer strands are uniformly arranged by the stranding process, the thickness of a rubber sheet calendered by a tire factory can be reduced, the weight of a tire can be reduced, the rubber infiltration is effectively improved, and the fatigue resistance of the steel cord thread is improved.
It can be seen through the contrast above, when the radial tire of preparation equal density, adopt the utility model discloses the radial tire intensity of preparation improves more than 10% than the radial tire intensity that adopts the prior art preparation. Radial tire steel cord performance is excellent, can effectively improve radial tire's intensity, reduces tire manufacturing cost, prolongs radial tire's life.
The embodiments of the present invention are merely examples. According to different application occasions, the monofilament of the 7+10 xd structure core strand 1 and the monofilament of the middle layer strand 2 of the utility model have the same diameter, the monofilament of the outer layer strand 3 can be matched by using monofilaments with various diameters, the structural formula is 7+10 xd, and the twisting direction is divided into S/S or Z/Z.
The present invention has been disclosed in the foregoing with reference to the preferred embodiments, but it is not intended to limit the present invention, and all technical solutions obtained by adopting equivalent replacement or equivalent transformation schemes fall within the protection scope of the present invention.
Claims (9)
1. The seventeen-strand radial tire steel wire cord is characterized by comprising a core strand (1), a middle layer strand (2) and an outer layer strand (3), wherein the core strand (1) consists of a strand of steel wire and is free of weaving and twisting; the middle layer strand (2) consists of six steel wires which are twisted around the core strand (1); the outer layer strand (3) consists of ten strands of steel wires which are twisted around the middle layer strand (2); the diameters of the steel wires of the core strand (1), the middle strand (2) and the outer strand (3) are the same, the twisting direction of the steel wires of the middle strand (2) is the same as that of the steel wires of the outer strand (3), and the twisting distance of the steel wires of the middle strand (2) is 0.50-0.80 times of that of the steel wires of the outer strand (3); the cross section of the steel cord is circular.
2. Seventeen radial tire steel cord according to claim 1, wherein the diameter of the steel wires of the core strand (1), the steel wires of the middle layer strand (2) and the steel wires of the outer layer strand (3) is 0.165-0.38 mm.
3. Seventeen radial tire steel cord according to claim 1, characterized in that the diameter of the core strand (1) steel filaments, the middle layer strand (2) steel filaments and the outer layer strand (3) steel filaments are all 0.20 mm.
4. Seventeen radial tire steel cord according to claim 1, characterized in that the diameter of the core strand (1) steel filaments, the middle layer strand (2) steel filaments and the outer layer strand (3) steel filaments are all 0.225 mm.
5. Seventeen radial tire steel cord according to claim 1, characterized in that the direction of twist of the steel wires of the middle layer strand (2) and the direction of twist of the steel wires of the outer layer strand (3) are both Z-twist or both S-twist.
6. Seventeen radial tire steel cord according to claim 1, characterized in that the lay length of the steel wires of the outer layer strands (3) is 12.5-30.0 mm.
7. Seventeen radial tire steel cord according to claim 1, characterized in that the lay length of the steel wires of the intermediate layer strands (2) is 10.0mm, and the lay length of the steel wires of the outer layer strands (3) is 16.0 mm.
8. Seventeen radial tire steel cord according to claim 1, characterized in that the lay length of the steel wires of the intermediate layer strands (2) is 12.5mm and the lay length of the steel wires of the outer layer strands (3) is 18.0 mm.
9. Seventeen radial tire steel cord according to claim 1, characterized in that the strength grades of the core strand (1) steel filaments, the intermediate layer strand (2) steel filaments, and the outer layer strand (3) steel filaments are normal strength NT, high strength HT, ultra high strength ST, ultra high strength UT, or ultra high strength MT.
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| CN201922036907.4U CN211571181U (en) | 2019-11-22 | 2019-11-22 | Seventeen-ply radial tire steel wire cord |
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| CN201922036907.4U CN211571181U (en) | 2019-11-22 | 2019-11-22 | Seventeen-ply radial tire steel wire cord |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110735340A (en) * | 2019-11-22 | 2020-01-31 | 江苏兴达钢帘线股份有限公司 | seventeen radial tire steel cord |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110735340A (en) * | 2019-11-22 | 2020-01-31 | 江苏兴达钢帘线股份有限公司 | seventeen radial tire steel cord |
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