CN113430693B - Preparation method of double-twist galvanized steel cord - Google Patents
Preparation method of double-twist galvanized steel cord Download PDFInfo
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- CN113430693B CN113430693B CN202110703052.5A CN202110703052A CN113430693B CN 113430693 B CN113430693 B CN 113430693B CN 202110703052 A CN202110703052 A CN 202110703052A CN 113430693 B CN113430693 B CN 113430693B
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- steel cord
- twisting
- double
- twisted
- galvanized steel
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Classifications
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- D—TEXTILES; PAPER
- D02—YARNS; MECHANICAL FINISHING OF YARNS OR ROPES; WARPING OR BEAMING
- D02G—CRIMPING OR CURLING FIBRES, FILAMENTS, THREADS, OR YARNS; YARNS OR THREADS
- D02G3/00—Yarns or threads, e.g. fancy yarns; Processes or apparatus for the production thereof, not otherwise provided for
- D02G3/44—Yarns or threads characterised by the purpose for which they are designed
- D02G3/48—Tyre cords
-
- D—TEXTILES; PAPER
- D10—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
- D10B—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
- D10B2505/00—Industrial
- D10B2505/02—Reinforcing materials; Prepregs
- D10B2505/022—Reinforcing materials; Prepregs for tyres
Abstract
The invention discloses a preparation method of a double-twist galvanized steel cord, which comprises the following steps: (1) Drawing the wire rod into a steel wire, and hot galvanizing the steel wire to obtain a galvanized steel wire; (2) Drawing the galvanized steel wire again through a water tank to obtain a drawn steel wire; (3) Selecting five drawn steel wires for pre-deformation to obtain a pre-deformed monofilament; (4) Twisting five pre-deformed monofilaments to obtain twisted steel cords; (5) Rolling up the twisted steel cord, and checking to obtain a double-twisted galvanized steel cord; the double-twist galvanized steel cord prepared by the invention has the advantages that the single filaments are more tightly twisted, the twisting quality of the steel cord is improved, the scattering condition of the steel cord can be effectively controlled, and the twisting efficiency of the steel cord is improved.
Description
Technical Field
The invention relates to the technical field of tires, in particular to a preparation method of a double-twist galvanized steel cord.
Background
With the rapid development of the automobile industry, the demand of the tire is continuously increased, higher requirements are put forward on the performance and quality of the steel cord, and because of overcast and rainy weather, when the automobile runs in a humid environment, water vapor can invade the inside of the steel cord to cause corrosion of the steel cord, in order to improve the corrosion resistance of the steel cord, the service life of the tire is prolonged, the surface of the steel cord is required to be galvanized to improve the corrosion resistance of the tire, the existing galvanized steel cord product is a single-twisted rope, the rope making speed is low, the efficiency is low, and the twisted steel cord is easy to deform after long-time use, so that the quality of the tire is influenced.
Disclosure of Invention
In view of the above, the present invention provides a method for preparing a double-twist galvanized steel cord to solve the above-mentioned technical problems.
The technical scheme adopted for solving the technical problems is as follows:
the preparation method of the double-twist galvanized steel cord comprises the following steps:
(1) Selecting a high-quality wire rod, drawing the wire rod by using a wire drawing machine to obtain a steel wire with the same specification, and hot galvanizing the steel wire to obtain a galvanized steel wire;
(2) Carrying out twenty-five times of low-compression drawing on the galvanized steel wire through a water tank again to obtain a drawn steel wire with the diameter of 0.30-0.37 mm;
(3) Selecting five drawn steel wires with the diameter of 0.30-0.37mm, and pre-deforming the five monofilaments by using a standard rope forming frame through a deformation wheel to obtain pre-deformed monofilaments;
(4) Twisting five pre-deformed monofilaments by adopting a six-axis paying-off type stranding double twisting machine, and simultaneously controlling residual torsion and flatness by adopting an ATC automatic residual torsion control device in combination with a straightener to obtain twisted steel cords;
(5) And (3) rolling the twisted steel cord, coating the twisted fatigue grease during rolling, finishing rolling, and checking to obtain the double-twist galvanized steel cord.
Further, the five drawn steel wires in the step (3) are in line contact, and the diameters of the five drawn steel wires are equal.
Further, the diameter of the deformation wheel in the step (3) is 6mm.
Further, the twisting conditions in the step (4) are pay-off tension of 550-650g, a twisting distance of 12.5mm and a twisting direction S.
Further, the straightener in the step (4) is a TAS straightener or a flat plate straightener, and the inner diameter of a straightening wheel of the straightener is 8-10 times of the diameter of the twisted steel cord.
Further, the length of the straightener is 23-25 times of the inner diameter of the straightening wheel, the distance between the straightening wheel and the straightening wheel is 1.7 times of the twisting distance, and the pressing amount is 1.7 times of the diameter of the twisted steel cord.
Further, the winding condition of the step (5) is constant tension of 1.8kg and the rotating speed is 3500r/min.
The beneficial effects of the invention are as follows:
the double-twist galvanized steel cord prepared by the invention adopts a standard rope forming frame to pretyp monofilaments through a deformation wheel with the diameter of 6mm, so that the twisting quality of the steel cord is improved, the scattering situation of the steel cord can be effectively controlled, the pretyped monofilaments are twisted by adopting a six-axis paying-off type stranding double-twisting machine, the twisting efficiency of the steel cord is improved, the double-twisting machine over-twisting device is matched with a straightener for use during twisting, the residual twisting and the flatness of the steel cord can be effectively controlled, the fatigue grease is coated on the steel cord during twisting after the twisting is finished, the ageing resistance and the fatigue resistance of the steel cord are improved, the production efficiency of the galvanized steel cord is effectively improved, the product compactness is enhanced, the appearance, the flatness and the residual twisting of the product are both well controlled, and the quality of the product is optimally improved.
Drawings
The invention is further described below with reference to the drawings and examples.
FIG. 1 is a schematic view of a cross-section of a double-twisted galvanized steel cord according to the invention
Detailed Description
The present invention will now be described in detail with reference to the accompanying drawings. The figure is a simplified schematic diagram illustrating the basic structure of the invention only by way of illustration, and therefore it shows only the constitution related to the invention.
The invention provides a preparation method of a double-twist galvanized steel cord, which comprises the following preparation steps:
(1) Selecting a high-quality wire rod, drawing the wire rod by using a wire drawing machine to obtain a steel wire with the same specification, and hot galvanizing the steel wire to obtain a galvanized steel wire;
(2) Carrying out twenty-five times of low-compression drawing on the galvanized steel wire through a water tank again to obtain a drawn steel wire with the diameter of 0.30-0.37 mm;
(3) Selecting five drawing steel wires with the same diameter, and pre-deforming the five monofilaments by using a standard rope forming frame through a deformation wheel with the diameter of 6mm to obtain pre-deformed monofilaments;
(4) Twisting five pre-deformed monofilaments in the S twisting direction S by adopting a six-axis paying-off type twisting double twisting machine at a paying-off tension of 550-650g and a twisting distance of 12.5mm, and simultaneously controlling residual twisting and flatness by adopting an ATC automatic residual twisting control device in combination with a straightener to obtain twisted steel cords;
(5) And (3) rolling the twisted steel cord at a constant tension of 1.8kg and a rotating speed of 3500r/min, coating and twisting fatigue grease during rolling, and checking to obtain the double-twist galvanized steel cord after rolling.
The straightener is a TAS straightener or a flat straightener, the inner diameter of a straightening wheel of the straightener is 8-10 times of the diameter of a twisted steel cord, the length of the straightener is 23-25 times of the inner diameter of the straightening wheel, the distance between the straightening wheel and the straightening wheel is 1.7 times of the twisting distance, and the pressing amount is 1.7 times of the diameter of the twisted steel cord.
Example 1
The preparation method of the double-twist galvanized steel cord of the embodiment comprises the following steps:
(1) Selecting a high-quality wire rod, drawing the wire rod by using a wire drawing machine to obtain a steel wire with the same specification, and hot galvanizing the steel wire to obtain a galvanized steel wire;
(2) Carrying out twenty-five times of low-compression drawing on the galvanized steel wire through a water tank again to obtain a drawn steel wire with the diameter of 0.30 mm;
(3) Selecting five drawing steel wires with the same diameter, and pre-deforming the five monofilaments by using a standard rope forming frame through a deformation wheel with the diameter of 6mm to obtain pre-deformed monofilaments;
(4) Twisting five pre-deformed monofilaments in the S twisting direction S by adopting a six-axis paying-off type twisting double twisting machine at a paying-off tension of 550g and a twisting distance of 12.5mm, and simultaneously controlling residual twisting and flatness by adopting an ATC automatic residual twisting control device in combination with a straightener to obtain twisted steel cords;
(5) And (3) rolling the twisted steel cord at a constant tension of 1.8kg and a rotating speed of 3500r/min, coating and twisting fatigue grease during rolling, and checking to obtain the double-twist galvanized steel cord after rolling.
The straightener is a TAS straightener, the inner diameter of a straightening wheel of the straightener is 8 times of the diameter of a twisted steel cord, and the length of the straightener is 23 times of the inner diameter of the straightening wheel.
Example 2
The preparation method of the double-twist galvanized steel cord of the embodiment comprises the following preparation steps:
(1) Selecting a high-quality wire rod, drawing the wire rod by using a wire drawing machine to obtain a steel wire with the same specification, and hot galvanizing the steel wire to obtain a galvanized steel wire;
(2) Carrying out twenty-five times of low-compression drawing on the galvanized steel wire through a water tank again to obtain a drawn steel wire with the diameter of 0.35 mm;
(3) Selecting five drawing steel wires with the same diameter, and pre-deforming the five monofilaments by using a standard rope forming frame through a deformation wheel with the diameter of 6mm to obtain pre-deformed monofilaments;
(4) Twisting five pre-deformed monofilaments in the S twisting direction S by adopting a six-axis paying-off type twisting double twisting machine at a paying-off tension of 600g and a twisting distance of 12.5mm, and simultaneously controlling residual twisting and flatness by adopting an ATC automatic residual twisting control device in combination with a straightener to obtain twisted steel cords;
(5) And (3) rolling the twisted steel cord at a constant tension of 1.8kg and a rotating speed of 3500r/min, coating and twisting fatigue grease during rolling, and checking to obtain the double-twist galvanized steel cord after rolling.
The straightener is a TAS straightener, the inner diameter of a straightening wheel of the straightener is 9 times of the diameter of a twisted steel cord, and the length of the straightener is 24 times of the inner diameter of the straightening wheel.
Example 3
The preparation method of the double-twist galvanized steel cord of the embodiment comprises the following preparation steps:
(1) Selecting a high-quality wire rod, drawing the wire rod by using a wire drawing machine to obtain a steel wire with the same specification, and hot galvanizing the steel wire to obtain a galvanized steel wire;
(2) Carrying out twenty-five times of low-compression drawing on the galvanized steel wire through a water tank again to obtain a drawn steel wire with the diameter of 0.37 mm;
(3) Selecting five drawing steel wires with the same diameter, and pre-deforming the five monofilaments by using a standard rope forming frame through a deformation wheel with the diameter of 6mm to obtain pre-deformed monofilaments;
(4) Twisting five pre-deformed monofilaments in the S twisting direction S by adopting a six-axis paying-off type twisting double twisting machine at a paying-off tension of 550-650g and a twisting distance of 12.5mm, and simultaneously controlling residual twisting and flatness by adopting an ATC automatic residual twisting control device in combination with a straightener to obtain twisted steel cords;
(5) And (3) rolling the twisted steel cord at a constant tension of 1.8kg and a rotating speed of 3500r/min, coating and twisting fatigue grease during rolling, and checking to obtain the double-twist galvanized steel cord after rolling.
The straightener is a TAS straightener, the inner diameter of a straightening wheel of the straightener is 10 times of the diameter of a twisted steel cord, and the length of the straightener is 25 times of the inner diameter of the straightening wheel.
Comparative example
Steel cord prepared by twisting five commercially available monofilaments
Experimental example
The steel cord samples prepared in examples 1-3 were tested and compared by experiment with the steel cord samples of comparative examples, and the test data are shown in table 1:
table 1: data alignment table for steel cords of examples 1-3
As can be seen from Table 1, the steel cord in the embodiments 1-3 of the invention adopts the standard rope forming frame to pretyp the monofilaments through the deformation wheel, the compactness between the monofilaments can be effectively improved during twisting, thereby improving the breaking force of the steel cord, reducing the breaking elongation, ensuring that the product is not easy to deform during use, twisting the pretyped monofilaments by adopting a six-axis pay-off type twisting double twister, improving the twisting efficiency of the steel cord, ensuring that the double twister over twister is matched with the straightener for use during twisting, effectively controlling the residual torsion and flatness of the steel cord, ensuring that the steel cord is not easy to deform during use, and improving the aging resistance and the fatigue resistance of the steel cord by applying the twisted fatigue grease to the steel cord during winding after the twisting, thereby optimizing and improving the quality of the product.
While the foregoing is directed to the preferred embodiment of the present invention, other and further embodiments of the invention may be devised without departing from the basic scope thereof, and the scope thereof is determined by the claims that follow. The technical scope of the present invention is not limited to the description, but must be determined according to the scope of claims.
Claims (4)
1. The preparation method of the double-twist galvanized steel cord is characterized by comprising the following steps of:
(1) Selecting a high-quality wire rod, drawing the wire rod by using a wire drawing machine to obtain a steel wire with the same specification, and hot galvanizing the steel wire to obtain a galvanized steel wire;
(2) Carrying out twenty-five times of low-compression drawing on the galvanized steel wire through a water tank again to obtain a drawn steel wire with the diameter of 0.30-0.37 mm;
(3) Five drawn steel wires with the diameter of 0.30-0.37mm are selected, the standard rope forming frame is used for carrying out pre-deformation on five monofilaments through the deformation wheel to obtain pre-deformed monofilaments,
the five drawn steel wires are in line contact, the diameters of the five drawn steel wires are equal, and the diameter of the deformation wheel is 6mm;
(4) Twisting five pre-deformed monofilaments by adopting a six-axis paying-off type stranding double twisting machine under the conditions of paying-off tension of 550-650g, twisting length of 12.5mm and twisting direction S, and simultaneously controlling residual torsion and flatness by adopting an ATC automatic residual torsion control device and a straightener to obtain twisted steel cords;
(5) And (3) rolling the twisted steel cord, coating the twisted fatigue grease during rolling, finishing rolling, and checking to obtain the double-twist galvanized steel cord.
2. The method for producing double-twist galvanized steel cord according to claim 1, wherein the straightener in the step (4) is a TAS straightener or a flat plate straightener, and the straightening wheel of the straightener has an inner diameter 8 to 10 times the diameter of the twisted steel cord.
3. The method of producing a double twisted galvanized steel cord according to claim 2, characterized in that the length of the straightener is 23-25 times the inner diameter of the straightening wheel, the distance between the straightening wheel and the straightening wheel is 1.7 times the lay length, and the amount of depression is 1.7 times the diameter of the twisted steel cord.
4. The method for producing a double-twist galvanized steel cord according to claim 1, wherein the winding condition in the step (5) is constant tension of 1.8kg and a rotational speed of 3500r/min.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110703052.5A CN113430693B (en) | 2021-06-24 | 2021-06-24 | Preparation method of double-twist galvanized steel cord |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110703052.5A CN113430693B (en) | 2021-06-24 | 2021-06-24 | Preparation method of double-twist galvanized steel cord |
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| CN113430693A CN113430693A (en) | 2021-09-24 |
| CN113430693B true CN113430693B (en) | 2023-09-22 |
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| CN202110703052.5A Active CN113430693B (en) | 2021-06-24 | 2021-06-24 | Preparation method of double-twist galvanized steel cord |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1985001074A1 (en) * | 1983-09-02 | 1985-03-14 | N.V. Bekaert S.A. | Steel cord for rubber articles |
| JPH07229077A (en) * | 1994-02-10 | 1995-08-29 | Tokyo Seiko Co Ltd | Steel cord for rubber reinforcement |
| JPH10325088A (en) * | 1997-05-20 | 1998-12-08 | Bridgestone Metalpha Kk | Steel cord for reinforcing rubber article, its production and pneumatic radial tire using the same as reinforcing material |
| CN203498695U (en) * | 2010-10-27 | 2014-03-26 | 贝卡尔特公司 | Open steel cord |
| CN108560296A (en) * | 2018-06-25 | 2018-09-21 | 江阴市伟裕金属制品有限公司 | A kind of belt skeleton enhancing steel wire rope and its production equipment and process |
| CN109338766A (en) * | 2018-11-10 | 2019-02-15 | 江苏兴达钢帘线股份有限公司 | 1 × n of one kind × d series radial tires steel cord production method |
| CN110485184A (en) * | 2019-07-11 | 2019-11-22 | 张家港市骏马钢帘线有限公司 | A kind of galvanized steel wire rope production technology |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20030079817A1 (en) * | 2001-05-15 | 2003-05-01 | Shinichi Miyazaki | Composite of steel cord and rubber composition and tire using the same |
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2021
- 2021-06-24 CN CN202110703052.5A patent/CN113430693B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1985001074A1 (en) * | 1983-09-02 | 1985-03-14 | N.V. Bekaert S.A. | Steel cord for rubber articles |
| JPH07229077A (en) * | 1994-02-10 | 1995-08-29 | Tokyo Seiko Co Ltd | Steel cord for rubber reinforcement |
| JPH10325088A (en) * | 1997-05-20 | 1998-12-08 | Bridgestone Metalpha Kk | Steel cord for reinforcing rubber article, its production and pneumatic radial tire using the same as reinforcing material |
| CN203498695U (en) * | 2010-10-27 | 2014-03-26 | 贝卡尔特公司 | Open steel cord |
| CN108560296A (en) * | 2018-06-25 | 2018-09-21 | 江阴市伟裕金属制品有限公司 | A kind of belt skeleton enhancing steel wire rope and its production equipment and process |
| CN109338766A (en) * | 2018-11-10 | 2019-02-15 | 江苏兴达钢帘线股份有限公司 | 1 × n of one kind × d series radial tires steel cord production method |
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Non-Patent Citations (1)
| Title |
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| 赵宪海等.《冶金铸造起重机用钢丝绳的选型与质量控制》.《金属材料与冶金工程》.2015,第43卷(第6期),正文第49-54页. * |
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| CN113430693A (en) | 2021-09-24 |
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