CN214219195U - Outer unsaturated steel wire cord - Google Patents
Outer unsaturated steel wire cord Download PDFInfo
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- CN214219195U CN214219195U CN202022660348.7U CN202022660348U CN214219195U CN 214219195 U CN214219195 U CN 214219195U CN 202022660348 U CN202022660348 U CN 202022660348U CN 214219195 U CN214219195 U CN 214219195U
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Abstract
The utility model discloses an outer unsaturated steel cord, including core strand steel wire, intermediate level strand steel wire and outer strand steel wire, the outside of core strand steel wire is located along the circumferencial direction to intermediate level strand steel wire, and the outside of intermediate level strand steel wire is located along the circumferencial direction to outer strand steel wire. The utility model discloses set up the outer strand steel wire of fourteen strands, clearance between the steel wire is great, is favorable to rubber fully to permeate intermediate level strand steel wire, avoids leading to the point contact friction between each layer steel wire because of not permeating sufficient rubber, and then avoids the problem that steel cord bearing capacity became invalid because of wearing and tearing.
Description
Technical Field
The utility model relates to an outer unsaturated steel cord belongs to steel cord technical field.
Background
The steel cord is an important component in a radial tire framework material, is a commonly used steel cord with a 3+9+15 x d structure of a radial tire, and is formed by twisting a core strand steel wire, a middle layer strand steel wire and an outer layer strand steel wire, wherein the diameters of the core strand steel wire, the middle layer strand steel wire and the outer layer strand steel wire are the same. (3 +9+ 15) x d1 has a twist direction of ZZZ, a lay length of 5.0/10.0/16.0mm or 6.3/12.5/18.0mm, the outer strand steel wires are arranged closely, gaps among the steel wires are small, and rubber cannot effectively permeate the middle strand steel wires to cause high air content in the 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. 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.
Disclosure of Invention
An object of the utility model is to overcome not enough among the prior art, provide an outer unsaturated steel cord, solve steel cord intensity not enough, the clearance is little between the outer thigh, and rubber can not effectively permeate intermediate level thigh steel wire and cause the higher defect of cord inside air content.
In order to achieve the above purpose, the utility model adopts the technical proposal that:
providing an outer unsaturated steel cord characterized by comprising core strand steel wires, intermediate layer strand steel wires and outer layer strand steel wires, wherein the core strand steel wires comprise at least three strands of core strand first layer steel wires, the intermediate layer strand steel wires comprise at least ten strands of intermediate layer strand second layer steel wires, and the outer layer strand steel wires comprise at least fourteen strands of outer layer strand third layer steel wires;
the middle layer strand steel wires are arranged along the circumferential direction and are arranged on the periphery of the core strand steel wires, and the outer layer strand steel wires are arranged along the circumferential direction and are arranged on the periphery of the middle layer strand steel wires;
the diameter of the core strand steel wire is larger than that of the middle strand steel wire, and the diameter of the outer strand steel wire is the same as that of the middle strand steel wire.
Furthermore, the diameter range of the steel wires of the core strands is 0.19-0.26 mm, and the diameter range of the steel wires of the middle layer strands and the diameter range of the steel wires of the outer layer strands are 0.17-0.24 mm.
Further, the diameter of the steel wires of the core strand is at least more than 0.02mm compared with the diameter of the steel wires of the middle layer strand.
Further, the twisting direction of the steel wires of the core strand is the same as that of the steel wires of the middle layer strand and that of the steel wires of the outer layer strand.
Furthermore, the lay length of the third layer of steel wires of the outer layer strands is 1.333-1.50 times of that of the second layer of steel wires of the middle layer strands, and the lay length of the first layer of steel wires of the core strands is equal to that of the third layer of steel wires of the outer layer strands.
Further, the lay length of the first layer of steel wires of the core strand is larger than that of the second layer of steel wires of the middle layer strand.
Further, the steel wire gap L between the third layer of steel wires of the outer layer strand is more than 0.035 mm.
Further, the strength grades of the first layer steel wires of the core strands, the second layer steel wires of the middle layer strands and the third layer steel wires of the outer layer strands are any one of common 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 utility model arranges fourteen strands of outer strand steel wires to increase the gap, which is beneficial to the rubber to fully permeate into the middle strand steel wires, avoids the point contact friction between each layer of steel wires caused by not permeating enough rubber, and further avoids the problem that the bearing capacity of the steel wire cord is invalid due to abrasion;
(2) the utility model discloses a change outer strand steel cord's structure, improve anticorrosive, fatigue-resistant, shock resistance and the bonding retentivity of tire, improve tire life.
Drawings
FIG. 1 is a schematic cross-sectional view of an outer unsaturated steel cord according to an embodiment of the present invention;
FIG. 2 is a cross-sectional schematic view of a steel cord of the prior art;
in the figure: 1. a core strand first layer of steel filaments; 2. a second layer of steel wires of the middle layer strand, 3 and a third layer of steel wires of the outer layer strand; 10. core strand steel wire; 20. middle layer strand steel wire; 30. outer layer strand steel wires; d1, core strand wire diameter; d2, intermediate ply wire diameter; d3, outer strand wire diameter; d4, wire diameter; l, steel wire gap.
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 "first", "second", and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implying any 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, 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 cross-sectional view of an outer unsaturated steel cord according to an embodiment of the present invention is a 3 xd 1+10 xd 2+14 xd 3 steel cord, table 1 shows data parameters of examples 1-8 of an outer unsaturated steel cord according to the present invention, the cross-section of the steel cord is circular, wherein the steel cord is formed by twisting a core strand steel wire 10 composed of three core strands of first layer steel wires 1, an intermediate layer strand steel wire 20 composed of ten intermediate layer strands of second layer steel wires 2, and an outer layer strand steel wire 30 composed of fourteen outer layer strands of second layer steel wires 3,
the diameter range of the first layer of steel wires 1 of the core strand is 0.19-0.26 mm; the diameters of the middle layer strand second layer steel wire 2 and the outer layer strand second layer steel wire 3 are the same, and the diameter range is 0.17-0.24 mm. The core strand steel filaments 10 have the same twist direction as the steel filaments in the middle layer strand steel filaments 20 and the outer layer strand steel filaments 30. The steel wire gaps L between the outer layer strands and the third layer of steel wires 3 are at least larger than 0.035mm, forming a structure with unsaturated steel cords in the outer layer.
The utility model discloses a change outer 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 embodiment of the present invention, the strength grades of the steel wires in the core strand steel wire 10, the middle layer strand steel wire 20 and the outer layer strand steel wire 30 are normal strength NT, high strength HT, super strength ST, extra high strength UT or extra high strength MT; the utility model is suitable for an arbitrary one of ordinary intensity NT, high strength HT, superhigh strength ST, extra-high strength UT or high strength MT, compile the steel wire of different intensity levels and twist with fingers, can improve the intensity requirement of the steel cord that the formation is twisted with fingers to the compile, ooze gluey performance and shock resistance, fatigue resistance ability.
TABLE 1
The first embodiment is as follows:
in the embodiment of the present invention, the 3 × 0.26+10+14 × 0.24HT structure is used for a steel cord for radial tire reinforcement. The diameter of the core strand steel wire diameter d1 in the core strand 10 is at least greater than 0.02mm than the diameter d2 of the intermediate layer strand in the intermediate layer strand 20, the diameter of the core strand first layer steel wire 1 in the steel cord is 0.26mm, the diameters of the intermediate layer strand second layer steel wire 2 and the outer layer strand second layer steel wire 3 are both 0.24mm, the twisting pitch of the core strand first layer steel wire 1 in a twisting mode is 18.0mm, the twisting pitch of the intermediate layer strand second layer steel wire 2 in a twisting mode is 12.5mm, and the twisting pitch of the outer layer strand second layer steel wire 3 in a twisting mode is 18.0 mm. The core strand steel wires 10 and the middle and outer strand steel wires 20 and 30 adopt the same twisting direction, and the twisting direction is Z twisting.
Fig. 2 is a schematic cross-sectional view of a steel cord in the prior art, which is a schematic cross-sectional view of a commonly used 3+9+15 × 0.245HT structural steel cord, the diameter of the 3+9+15 × 0.245HT structural steel cord is 1.51mm, the diameters of the core strand steel wire 10, the middle strand steel wire 20 and the outer strand steel wire 30 are the same and are the steel wire diameter d4, the value is 0.245mm, and the core strand steel wire 10, the middle strand steel wire 20 and the outer strand steel wire 30 are all ZZZ twisted.
Table 2 shows the comparison table of the performance indexes of the 3+9+15 × 0.245HT structural steel cord commonly used for radial tires in the prior art and the 3 × 0.26+10+14 × 0.24HT structural steel cord of the embodiment of the present invention:
TABLE 2
The 3+9+15 × 0.245HT structural steel cord is a structural steel cord commonly used in the prior art, and it can be seen from table 2 that the diameter of the 3+9+15 × 0.245HT structural steel cord is 1.51mm, the diameters of the core strand steel wire 10, the intermediate layer strand steel wire 20 and the outer layer strand steel wire 30 are both 0.245mm, the core strand steel wire 10, the intermediate layer strand steel wire 20 and the outer layer strand steel wire 30 are all Z-twisted, the lay length of the core strand steel wire 10 is 6.3mm, the lay length of the intermediate layer strand steel wire 20 is 12.5mm, the lay length of the outer layer strand steel wire 30 is 18.0mm, the breaking force is not less than 3730N, the breaking force/linear density is 363.5N/(/ g/m), and the adhesive force is not less than 1600N/25 mm.
The utility model provides a steel cord's diameter is 1.52mm, core thigh steel wire 10 diameter is 0.26mm, intermediate level thigh steel wire 20 and outer thigh steel wire 30 diameter are 0.24mm, core thigh steel wire 10, intermediate level thigh steel wire 20, outer thigh steel wire 30 is Z twists with the fingers, the lay length of core thigh steel wire 10 is 18.0mm, intermediate level thigh steel wire 20's lay length is 12.5mm, outer thigh steel wire 30's lay length is 18.0mm, the power of breaking is more than or equal to 3730N, the power of breaking/linear density is 374N/(mm), the adhesive force is more than or equal to 1600N 25 mm. Compared with the prior art, the embodiment of the utility model provides an adopt the steel wire of equal intensity level, through increasing core strand diameter and lay length, reducing outer thigh and increase intermediate level thigh monofilament quantity promote cord line intensity, ooze gluey rate and fatigue resistance ability.
Example two:
in the embodiment of the utility model, 3 x 0.24+10+14 x 0.22ST structure is used for radial tire reinforcing steel cord. The diameter of the core strand steel wire diameter d1 in the core strand 10 is at least greater than 0.02mm than the diameter d2 of the intermediate layer strand in the intermediate layer strand 20, the diameter of the core strand first layer steel wire 1 in the steel cord is 0.24mm, the diameters of the intermediate layer strand second layer steel wire 2 and the outer layer strand second layer steel wire 3 are both 0.22mm, the twisting pitch of the core strand first layer steel wire 1 in a twisting mode is 18.0mm, the twisting pitch of the intermediate layer strand second layer steel wire 2 in a twisting mode is 12.5mm, and the twisting pitch of the outer layer strand second layer steel wire 3 in a twisting mode is 18.0 mm. The core strand steel wires 10 and the middle and outer strand steel wires 20 and 30 adopt the same twisting direction, and the twisting direction is Z twisting.
Table 3 is a table comparing performance indexes of 3+9+15 × 0.225ST structural steel cord commonly used for radial tires in the prior art and the two 3 × 0.24+10+14 × 22ST structural steel cords of the embodiment of the present invention:
TABLE 3
| |
3+9+15×0.225 |
3×0.24+10+14×0.22ST |
| Cord diameter (+ -5%)/mm | 1.39 | 1.39 |
| Direction of twist | ZZZ | ZZZ |
| Lay length (± 5%)/mm | 6.3/12.5/18.0/ | 18.0/12.5/18.0 |
| Minimum breaking force/N | 3485 | 3500 |
| Linear density (. + -. 5%)/g/m | 8.63 | 8.36 |
| Breaking force/linear density N/(g/m) | 403.8 | 418.6 |
| Adhesion (N/25mm) | 1300 | 1300 |
The 3+9+15 × 0.225ST structural steel cord is a structural steel cord commonly used in the prior art, and it can be seen from table 3 that the diameter of the 3+9+15 × 0.225ST structural steel cord is 1.39mm, the diameters of the core strand steel wire 10, the intermediate strand steel wire 20 and the outer strand steel wire 30 are both 0.225mm, the diameters of the core strand steel wire 10, the intermediate strand steel wire 20 and the outer strand steel wire 30 are all Z-twisted, the lay length of the core strand first layer steel wire 1 is 6.3mm, the lay length of the intermediate layer strand second layer steel wire 2 is 12.5mm, the lay length of the outer strand second layer steel wire 3 is 18.0mm, the breaking force is not less than 3485N, the breaking force/wire density is 403.8/(/ g/m), and the adhesive force is not less than 1300N/25 mm.
The diameter of the steel cord of the second embodiment of the present invention is 1.39mm, the diameter of the core strand steel wire 10 is 0.24mm, the diameters of the middle strand steel wire 20 and the outer strand steel wire 30 are 0.22mm, the core strand steel wire 10, the middle strand steel wire 20, the outer strand steel wire 30 are Z-twisted, the lay length of the core strand steel wire 10 is 18.0mm, the lay length of the middle strand steel wire (20) is 12.5mm, the lay length of the outer strand steel wire (30) is 18.0mm, the breaking force is not less than 3500N, the breaking force/linear density is 418.6N/(mm), and the adhesive force is not less than 1300N/25 mm.
Compared with the two, the embodiment of the utility model provides a two adopt the steel wire of equal intensity grade, through increasing core strand diameter and lay length, reduce outer thigh and increase intermediate level thigh monofilament quantity promote cord line intensity, ooze gluey rate and fatigue resistance ability.
Example three:
in the embodiment of the utility model, the 3 × 0.215+10+14 × 0.195ST structure is used for radial tire reinforcing steel cord. The diameter of the core strand steel wire diameter d1 in the core strand 10 is at least greater than 0.02mm than the diameter d2 of the intermediate layer strand in the intermediate layer strand 20, the diameter of the core strand first layer steel wire 1 in the steel cord is 0.215mm, the diameters of the intermediate layer strand second layer steel wire 2 and the outer layer strand second layer steel wire 3 are both 0.195mm, the twisting pitch of the core strand first layer steel wire 1 in a twisting mode is 16.0mm, the twisting pitch of the intermediate layer strand second layer steel wire 2 in a twisting mode is 12.0mm, and the twisting pitch of the outer layer strand second layer steel wire 3 in a twisting mode is 16.0 mm. The core strand steel wires 10 and the middle and outer strand steel wires 20 and 30 adopt the same twisting direction, and the twisting direction is Z twisting.
Table 4 is a table comparing performance indexes of 3+9+15 × 0.20ST structural steel cord commonly used for radial tires in the prior art and the three 3 × 0.215+10+14 × 0.195ST structural steel cords of the embodiment of the present invention:
TABLE 4
The 3+9+15 × 0.20ST structural steel cord is a structural steel cord commonly used in the prior art, and it can be seen from table 4 that the diameter of the 3+9+15 × 0.20ST structural steel cord is 1.22mm, the diameters of the core strand steel wire 10, the intermediate layer strand steel wire 20 and the outer layer strand steel wire 30 are both 0.20mm, the diameters of the core strand steel wire 10, the intermediate layer strand steel wire 20 and the outer layer strand steel wire 30 are all Z-twisted, the lay length of the core strand first layer steel wire 1 is 6.3mm, the lay length of the intermediate layer strand second layer steel wire 2 is 12.5mm, the lay length of the outer layer strand second layer steel wire 3 is 15.0mm, the breaking force is not less than 2750N, the breaking force/linear density is 404.4/(/ g/m), and the adhesive force is not less than 500N/12.5 mm.
The diameter of the steel cord of the third embodiment of the present invention is 1.23mm, the core strand steel wire 10 diameter is 0.215mm, the intermediate layer strand steel wire 20 and the outer layer strand steel wire 30 diameter are 0.195mm, the core strand steel wire 10, the intermediate layer strand steel wire 20, the outer layer strand steel wire 30 are Z twist, the lay length of the core strand steel wire 10 is 16.0mm, the lay length of the intermediate layer strand steel wire (20) is 12.0mm, the lay length of the outer layer strand steel wire (30) is 16.0mm, the breaking force is not less than 2800N, the breaking force/linear density is 425.5N/(mm), the adhesive force is not less than 500N/12.5 mm.
Compared with the two, the embodiment of the utility model provides a three adopt the steel wire of equal intensity grade, through increasing core strand diameter and lay length, reducing outer thigh and increase intermediate level thigh monofilament quantity promote cord line intensity, ooze gluey rate and fatigue resistance ability.
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 3% with the radial tire intensity that adopts prior art preparation, and cord oozes gluey performance and fatigue resistance can improve by a wide margin. The utility model discloses can effectively reduce radial tire's manufacturing cost, prolong engineering vehicle radial tire's life.
The embodiment of the utility model provides a be the example only, according to the application of difference, the utility model discloses a 3 xd 1+10 xd 2+14 xd 3 structure, steel wire in the steel wire of core thigh steel wire 10 and the steel wire in the intermediate level thigh steel wire 20 and outer thigh steel wire 30 can use different steel wire diameters and intensity to come the ratio, and the direction of twist can be divided into ZZZ and SSS or ZZS and SSZ.
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 (7)
1. An outer unsaturated steel cord characterized by comprising core strand steel filaments (10), intermediate layer strand steel filaments (20) and outer layer strand steel filaments (30), said core strand steel filaments (10) comprising at least three core strand first layer steel filaments (1), said intermediate layer strand steel filaments (20) comprising at least ten intermediate layer strand second layer steel filaments (2), said outer layer strand steel filaments (30) comprising at least fourteen outer layer strand third layer steel filaments (3);
the middle layer strand steel wires (20) are arranged along the circumferential direction and are arranged on the periphery of the core strand steel wires (10), and the outer layer strand steel wires (30) are arranged along the circumferential direction and are arranged on the periphery of the middle layer strand steel wires (20);
the core strand steel wire (10) has a core strand steel wire diameter (d 1) larger than the intermediate strand steel wire diameter (d 2) of the intermediate strand steel wire (20), and the outer strand steel wire diameter (d 3) of the outer strand steel wire (30) is the same as the intermediate strand steel wire diameter (d 2).
2. An outer unsaturated steel cord according to claim 1 characterized in that said core strand steel wire diameter (d 1) ranges from 0.19 to 0.26mm and said intermediate layer strand steel wire diameter (d 2) and outer layer strand steel wire diameter (d 3) ranges from 0.17 to 0.24 mm.
3. An outer unsaturated steel cord according to claim 2 characterized in that said core strand steel wire diameter (d 1) is at least larger than 0.02mm compared to the middle layer strand steel wire diameter (d 2).
4. An outer unsaturated steel cord according to claim 1 characterized in that said core strand steel filaments (10) have the same twist direction as the middle strand steel filaments (20) and the outer strand steel filaments (30).
5. An outer unsaturated steel cord according to claim 1 characterized in that said outer ply third layer of steel filaments (3) has a lay length 1.333 to 1.50 times the lay length of the middle ply second layer of steel filaments (2), said core ply first layer of steel filaments (1) having a lay length equal to the lay length of the outer ply third layer of steel filaments (3).
6. An outer unsaturated steel cord according to claim 1 characterized in that the steel filament gap (L) between the outer strand third layer steel filaments (3) is more than 0.035 mm.
7. An outer unsaturated steel cord according to claim 1 characterized in that said core strand first layer steel filaments (1), intermediate layer strand second layer steel filaments (2) and outer layer strand third layer steel filaments (3) have a strength grade of any of normal strength NT, high strength HT, ultra high strength ST, ultra high strength UT or ultra high strength MT.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022660348.7U CN214219195U (en) | 2020-11-17 | 2020-11-17 | Outer unsaturated steel wire cord |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022660348.7U CN214219195U (en) | 2020-11-17 | 2020-11-17 | Outer unsaturated steel wire cord |
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| CN214219195U true CN214219195U (en) | 2021-09-17 |
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| CN202022660348.7U Active CN214219195U (en) | 2020-11-17 | 2020-11-17 | Outer unsaturated steel wire cord |
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