CN113308919A - Compact steel cord with 1+ M + N structure and manufacturing method thereof - Google Patents
Compact steel cord with 1+ M + N structure and manufacturing method thereof Download PDFInfo
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- CN113308919A CN113308919A CN202110718768.2A CN202110718768A CN113308919A CN 113308919 A CN113308919 A CN 113308919A CN 202110718768 A CN202110718768 A CN 202110718768A CN 113308919 A CN113308919 A CN 113308919A
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- steel
- sheath
- cord
- compact
- wire
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- D—TEXTILES; PAPER
- D07—ROPES; CABLES OTHER THAN ELECTRIC
- D07B—ROPES OR CABLES IN GENERAL
- D07B1/00—Constructional features of ropes or cables
- D07B1/06—Ropes or cables built-up from metal wires, e.g. of section wires around a hemp core
-
- D—TEXTILES; PAPER
- D07—ROPES; CABLES OTHER THAN ELECTRIC
- D07B—ROPES OR CABLES IN GENERAL
- D07B1/00—Constructional features of ropes or cables
- D07B1/06—Ropes or cables built-up from metal wires, e.g. of section wires around a hemp core
- D07B1/0673—Ropes or cables built-up from metal wires, e.g. of section wires around a hemp core having a rope configuration
-
- D—TEXTILES; PAPER
- D07—ROPES; CABLES OTHER THAN ELECTRIC
- D07B—ROPES OR CABLES IN GENERAL
- D07B1/00—Constructional features of ropes or cables
- D07B1/06—Ropes or cables built-up from metal wires, e.g. of section wires around a hemp core
- D07B1/0673—Ropes or cables built-up from metal wires, e.g. of section wires around a hemp core having a rope configuration
- D07B1/0686—Ropes or cables built-up from metal wires, e.g. of section wires around a hemp core having a rope configuration characterised by the core design
-
- D—TEXTILES; PAPER
- D07—ROPES; CABLES OTHER THAN ELECTRIC
- D07B—ROPES OR CABLES IN GENERAL
- D07B2201/00—Ropes or cables
- D07B2201/10—Rope or cable structures
- D07B2201/1012—Rope or cable structures characterised by their internal structure
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- D—TEXTILES; PAPER
- D07—ROPES; CABLES OTHER THAN ELECTRIC
- D07B—ROPES OR CABLES IN GENERAL
- D07B2201/00—Ropes or cables
- D07B2201/10—Rope or cable structures
- D07B2201/1012—Rope or cable structures characterised by their internal structure
- D07B2201/102—Rope or cable structures characterised by their internal structure including a core
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- D—TEXTILES; PAPER
- D07—ROPES; CABLES OTHER THAN ELECTRIC
- D07B—ROPES OR CABLES IN GENERAL
- D07B2201/00—Ropes or cables
- D07B2201/20—Rope or cable components
- D07B2201/2047—Cores
- D07B2201/2048—Cores characterised by their cross-sectional shape
-
- D—TEXTILES; PAPER
- D07—ROPES; CABLES OTHER THAN ELECTRIC
- D07B—ROPES OR CABLES IN GENERAL
- D07B2201/00—Ropes or cables
- D07B2201/20—Rope or cable components
- D07B2201/2047—Cores
- D07B2201/2052—Cores characterised by their structure
- D07B2201/2059—Cores characterised by their structure comprising wires
-
- D—TEXTILES; PAPER
- D07—ROPES; CABLES OTHER THAN ELECTRIC
- D07B—ROPES OR CABLES IN GENERAL
- D07B2501/00—Application field
- D07B2501/20—Application field related to ropes or cables
- D07B2501/2046—Tire cords
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- Ropes Or Cables (AREA)
Abstract
The invention discloses a compact steel cord with a 1+ M + N structure and a manufacturing method of the compact steel cord with the 1+ M + N structure, which are composed of a special-shaped central steel wire, M first sheath steel wires and N second sheath steel wires, wherein the M first sheath steel wires and the N second sheath steel wires are twisted around the central steel wire in the same twisting direction and twisting distance to form the cord. The invention weakens the problem of corner warping caused by inconsistent residual stress of the inner layer and the outer layer after the compact steel cord with the 1+ M + N structure is embedded into rubber, so that the cord fabric is smoother, the forming is better, and the production process is more stable; meanwhile, the steel wires of the specification are in line contact with the compact open type cord, so that the fatigue performance of the steel cord is improved, the permeability of rubber is increased, and air in the steel cord after vulcanization of the tire is reduced or eliminated, so that the corrosion resistance of the tire is improved, and the service life of the tire is prolonged.
Description
Technical Field
The invention relates to the technical field of steel cords, in particular to a compact steel cord with a 1+ M + N structure and a manufacturing method thereof.
Background
The steel cord is a thin steel strand or rope which is made of high-quality high-carbon steel, has brass plated on the surface and has special purposes. The rubber composite material is mainly used for car tires, light truck tires, heavy truck tires, engineering machinery vehicle tires, airplane tires and other rubber product framework materials. The radial ply tire manufactured by adopting the steel cord as the reinforcing material has the advantages of long service life, high driving speed, puncture resistance, good elasticity, safety, comfort, fuel saving and the like.
When the existing steel cord with the structure of 1+ M + N is produced on a double-twisting machine, the residual stress of the inner layer and the outer layer is different, the warp of the cord fabric is easily caused, and meanwhile, the fatigue performance of the tire is influenced because the outer layer M and the outer layer N are wrapped too tightly and the rubber material cannot permeate sufficiently.
Thus a compact steel cord with a 1+ M + N structure is provided which overcomes the above mentioned drawbacks.
Disclosure of Invention
The object of the present invention is to provide a compact steel cord with a 1+ M + N structure to solve the problems set forth in the background art described above.
In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides a compact steel cord with 1+ M + N structure, includes a center steel wire, a first skin and a second skin that sets gradually from inside to outside, first skin includes M first sheath steel wires, the second skin includes N second sheath steel wires, M first sheath steel wire and N second sheath steel wire twists with the same lay direction and the same lay length around the center steel wire, the cross-section of center steel wire is rectangle or oval-shaped.
Further, the cross section of the central steel wire is rectangular, and the aspect ratio of the width to the thickness of the cross section of the central steel wire is 1.05-1.6, preferably 1.2-1.5.
Further, the cross section of the central steel wire is in a shape of a waist circle, and the aspect ratio of the width to the thickness of the cross section of the central steel wire is 1.05-1.6, preferably 1.2-1.5.
Further, the cross section of the central steel wire is elliptical, the eccentricity of the cross section of the central steel wire is 0.4-0.8, preferably 0.67, the major axis a of the cross section of the central steel wire is 0.15-0.52mm, and the minor axis b of the cross section of the central steel wire is 0.10-0.44 mm.
Further, at least one of the first sheath wires has a pre-deformation, and the sheath wire having the pre-deformation is pre-formed by a polygonal pre-deformer or deformed by gear meshing.
Further, at least one of the second sheath wires has a pre-deformation, and the sheath wire having the pre-deformation is pre-formed by a polygonal pre-deformer or deformed by gear meshing.
The invention also provides a manufacturing method of the compact steel cord with the 1+ M + N structure, which comprises the following steps:
s1: the central steel wire is deformed and is directly drawn and formed by penetrating the central steel wire into a die;
s2: pre-deforming the sheath steel wires, namely pre-deforming the first sheath steel wires and the second sheath steel wires in required quantity through a polygonal pre-deformer or a gear;
s3: and twisting, namely twisting M first sheath steel wires and N second sheath steel wires on the central steel wire by a stranding machine in the same twist phase and twist pitch to finish the production of the compact steel cord with the structure of 1+ M + N.
The invention has the technical effects and advantages that:
the invention adopts the center steel wire special-shaped steel wire, the two outer layers adopt the deformed steel wires, and simultaneously, the warp problem and the rubber material permeation problem of the cord fabric are considered, thereby being beneficial to improving the tire production and forming quality and prolonging the service life of the tire; the influence of different residual stresses of the inner and outer layer steel wires on the tilt angle of the cord fabric is weakened through the good performance of the special-shaped central steel wire when the compact steel cord with the 1+ M + N structure is embedded into the rubber layer; through the deformation combination of different sheath steel wires of the first outer layer and the second outer layer, better rubber permeability is obtained, the fatigue performance of the tire is improved, and the service life of the tire is prolonged; the steel wires of the specification are in line contact with the compact open type cord, so that the fatigue performance of the steel cord is improved, the permeability of rubber is increased, and air in the steel cord after vulcanization of the tire is reduced or eliminated, so that the corrosion resistance of the tire is improved, and the service life of the tire is prolonged.
Drawings
Fig. 1 schematically shows the structure of embodiment 1 of the present invention;
FIG. 2 schematically shows the structure of embodiment 2 of the present invention;
FIG. 3 schematically shows the structure of embodiment 3 of the present invention;
fig. 4 schematically shows the structure of embodiments 4 to 5 of the present invention.
Wherein, the center steel wire 100; a first sheath wire 200; the second sheath wire 300.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The invention provides a compact steel cord with a 1+ M + N structure, which comprises a central steel wire 100, a first outer layer and a second outer layer, wherein the central steel wire 100, the first outer layer and the second outer layer are sequentially arranged from inside to outside, the first outer layer comprises M first sheath steel wires 200, the second outer layer comprises N second sheath steel wires 300, the M first sheath steel wires 200 and the N second sheath steel wires 300 are twisted around the central steel wire 100 in the same twisting direction and the same twisting distance, the cross section of the central steel wire is rectangular, oval or elliptical, the value of M is 5-8, 6 is preferentially selected, and the value of N is 10-14, 12 is preferentially selected.
The cross section of the central steel wire 100 is rectangular, and the aspect ratio of the width to the thickness of the cross section of the central steel wire 100 is 1.05-1.6.
Or the cross section of the central steel wire 100 is in a waist-round shape, and the aspect ratio of the width to the thickness of the cross section of the central steel wire 100 is 1.05-1.6.
Or, the cross section of the central steel wire 100 is elliptical, the eccentricity of the cross section of the central steel wire 100 is 0.4-0.8, the major axis a of the cross section of the central steel wire 100 is 0.15-0.52mm, and the minor axis b of the cross section of the central steel wire 100 is 0.10-0.44 mm.
Wherein at least one of the first sheath wires has a pre-deformation, the first sheath wire having the pre-deformation is pre-shaped by a polygonal pre-deformer or deformed by gear meshing; and at least one of the second sheath wires has a pre-deformation, and the second sheath wire having the pre-deformation is pre-formed by a polygonal pre-deformer or deformed by gear engagement.
The invention provides a method for manufacturing a compact steel cord with a 1+ M + N structure, which mainly comprises the following steps: deforming the central steel wire 100, and penetrating the central steel wire 100 into a die for direct drawing forming; pre-deforming the sheath steel wires, namely pre-deforming the first sheath steel wire 200 and the second sheath steel wire 300 with required quantity through a polygonal pre-deformer or a gear; and twisting, namely twisting M first sheath steel wires 200 and N second sheath steel wires 300 on the central steel wire 100 by a stranding machine with the same twist phase and twist pitch to finish the production of the compact steel cord with the structure of 1+ M + N.
Example 1
The cross-section of center wire is the rectangle, has a center wire, 6 first sheath steel wires and 12 second sheath steel wires, and center wire width is 0.30mm, and the thickness of center wire is 0.20mm, and 6 first sheath steel wires and 12 second sheath steel wires all have predeformation, warp through the gear engagement. The diameter of the first sheath steel wire is 0.225mm, and the diameter of the second sheath steel wire is 0.225 mm.
Example 2
The cross-section of center wire is oval, has a center wire, 6 first sheath steel wires and 12 second sheath steel wires, and the major axis a value of center wire is at 0.42mm, and the minor axis b value of center wire is at 0.32mm, and the sheath steel wire is indeformable, and 0.32mm is chooseed for use to the diameter of first sheath steel wire, and the diameter of second sheath steel wire is chooseed for use: 0.32 mm.
Example 3
The cross-section of center wire is the waist circle shape, has a center wire, 6 first sheath steel wires and 12 second sheath steel wires, and center wire width is 0.37mm, and the thickness of center wire is 0.27mm, and six first sheath steel wires and 12 second sheath steel wires have predeformation, warp through gear engagement, and 0.28mm is selected for use to the diameter of first sheath steel wire, and 0.26mm is selected for use to the diameter of second sheath steel wire.
Example 4
The cross-section of center wire is oval, has a center wire, 6 first sheath steel wires and 12 second sheath steel wires, and the major axis a value of center wire is at 0.52mm, and the minor axis b value of center wire is at 0.44mm, and six first sheath steel wires and 12 second sheath steel wires have predeformation, warp through the gear engagement, and 0.43mm is selected for use to the diameter of first sheath steel wire, and 0.43mm is selected for use to the diameter of second sheath steel wire.
Example 5
The cross-section of center wire is oval, has a center wire, 6 first sheath steel wires and 12 second sheath steel wires, and the major axis a value of center wire is at 0.15mm, and the minor axis b value of center wire is at 0.10mm, and six first sheath steel wires and 12 second sheath steel wires have predeformation, warp through the gear engagement, and 0.10mm is selected for use to the diameter of first sheath steel wire, and 0.10mm is selected for use to the diameter of second sheath steel wire.
The test data for examples 1-5 are shown in Table 1 below:
TABLE 1
The steel wire strength in table 1 is indicated by a market strength grade HT.
As can be seen from the above table, in the embodiments 1 to 5, air remaining in the steel cord after rubber vulcanization is effectively reduced or eliminated, and the rubber penetration property of the steel cord is improved.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments or portions thereof without departing from the spirit and scope of the invention.
Claims (7)
1. The utility model provides a compact steel cord with 1+ M + N structure, includes a center steel wire, a first skin and a second skin that sets gradually from inside to outside, its characterized in that, first skin includes M first sheath steel wires, the second skin includes N second sheath steel wires, M first sheath steel wire and N second sheath steel wire twists with the same lay direction and the same lay length around center steel wire, center steel wire's cross-section is rectangle or oval-shaped.
2. A compact steel cord with a structure of 1+ M + N according to claim 1, characterized in that said central steel filament has a rectangular cross section, said central steel filament having an aspect ratio of width to thickness in the range of 1.05-1.6.
3. A compact steel cord with a structure of 1+ M + N according to claim 1, characterized in that said central steel filament has a cross section in the shape of a waist circle, said central steel filament having an aspect ratio of width to thickness in the cross section of 1.05-1.6.
4. A compact steel cord with a structure of 1+ M + N as claimed in claim 1, characterized in that said center steel filament has an elliptical cross-section, said center steel filament has a cross-section eccentricity of 0.4-0.8, said center steel filament has a cross-section with a major axis a having a value of 0.15-0.52mm and said center steel filament has a cross-section with a minor axis b having a value of 0.10-0.44 mm.
5. A compact steel cord with a structure of 1+ M + N according to any one of the claims 1-4, characterized in that at least one of said first sheath filaments is pre-deformed, said sheath filament with pre-deformation being pre-shaped by means of a polygonal pre-deformer or being deformed by means of gear meshing.
6. A compact steel cord with a structure of 1+ M + N as claimed in claim 5, characterized in that at least one of said second sheath wires has a pre-deformation, said sheath wire with a pre-deformation being pre-shaped by means of a polygonal pre-deformer or being deformed by means of gear meshing.
7. Method for making a compact steel cord with a structure of 1+ M + N according to claim 6, characterized in that it comprises:
s1: the central steel wire is deformed and is directly drawn and formed by penetrating the central steel wire into a die;
s2: pre-deforming the sheath steel wires, namely pre-deforming the first sheath steel wires and the second sheath steel wires in required quantity through a polygonal pre-deformer or a gear;
s3: and twisting, namely twisting M first sheath steel wires and N second sheath steel wires on the central steel wire by a stranding machine in the same twist phase and twist pitch to finish the production of the compact steel cord with the structure of 1+ M + N.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110718768.2A CN113308919A (en) | 2021-06-28 | 2021-06-28 | Compact steel cord with 1+ M + N structure and manufacturing method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110718768.2A CN113308919A (en) | 2021-06-28 | 2021-06-28 | Compact steel cord with 1+ M + N structure and manufacturing method thereof |
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| Publication Number | Publication Date |
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| CN113308919A true CN113308919A (en) | 2021-08-27 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202110718768.2A Withdrawn CN113308919A (en) | 2021-06-28 | 2021-06-28 | Compact steel cord with 1+ M + N structure and manufacturing method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114250639A (en) * | 2021-11-29 | 2022-03-29 | 泰州兴达特种钢丝绳有限公司 | 1X 19 structure steel wire rope and preparation method thereof |
-
2021
- 2021-06-28 CN CN202110718768.2A patent/CN113308919A/en not_active Withdrawn
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114250639A (en) * | 2021-11-29 | 2022-03-29 | 泰州兴达特种钢丝绳有限公司 | 1X 19 structure steel wire rope and preparation method thereof |
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Application publication date: 20210827 |
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