WO2020113604A1

WO2020113604A1 - Steel wire rope that has high structural stability and preparation process therefor

Info

Publication number: WO2020113604A1
Application number: PCT/CN2018/120152
Authority: WO
Inventors: 刘祥; 周志嵩; 姚利丽; 冯国兵; 寇首鹏; 陈长新; 封恒; 朱晨露
Original assignee: 江苏兴达钢帘线股份有限公司
Priority date: 2018-12-03
Filing date: 2018-12-10
Publication date: 2020-06-11
Also published as: CN109338769A

Abstract

A steel wire rope that has high structural stability and a preparation process therefor. The steel wire rope comprises a center steel wire (2), and a plurality of outer winding steel wires (3) arranged around the center steel wire (2); the diameter of the center steel wire (2) is d, the center steel wire (2) is periodically deformed by means of a deformation straightener, the deformation height thereof is h, and the length of one deformation is L2, wherein h=1-1.3d, and L2 is less than the twisted lay pitch of the outer winding steel wires (3) and the center steel wire (2) of the steel wire rope; and the distance between adjacent outer winding wires (3) of the plurality of outer winding steel wires (3) evenly arranged around the center steel wire (2) is L1, wherein L1<0.1d. By means of the setting above, the rubber penetration rate of the steel wire rope may be greatly improved; and the resistance of the central steel wire to puncturing a tire is increased, so that the structure of a skeleton material is more stable, and the safety and service life of the tire are improved.

Description

Steel wire rope with high structural stability and preparation process thereof

Technical field

The invention relates to the technical field of steel wire rope production, in particular to a steel wire rope with high structural stability used for reinforcing materials of rubber and plastic products and a preparation process thereof.

Background technique

The fine-gauge steel wire is twisted by twisting equipment and then applied to rubber or plastic products, so that the rubber and plastic products have excellent performance and a long service life. The technical means have been adopted and put into use by many manufacturers. And the product also has a high market share. The most typical examples are radial tires, timing belts and conveyor belts for automobiles.

Taking the use of tires as an example, steel cords made of steel wire monofilaments are first arranged in a cord and then vulcanized and bonded with the tire rubber, so that the steel cords can be fixed in the tire. Although the research and development of steel cords have replaced traditional nylon products, the strength, service life, driving comfort and driving safety of tires have been improved, but with the development of society, the market has increasingly demanded tires. The higher. As a component of tires, steel cords also face new challenges. As we all know, during the use of automobile tires, they will contact with the uneven ground, so that the inner belt layer is subject to periodic compression stress and repeated bending, because the bonding area of the steel wire in the center of the steel cord and the tire rubber is far It is smaller than the outer layer steel wire, so that the steel cord under the prior art is prone to the phenomenon that the central steel wire sticks out after long-term use. In addition, for the rubber products such as timing belts or conveyor belts that are driven around the rollers, the surface of the steel belt will have burrs on the surface during the middle and late use of the product. In the existing patents, in addition to adopting a fully open structure, the surface modification of the steel wire is used to increase the adhesion between the central steel wire and the rubber to eliminate this drawback. The process control needs to be very precise, which will increase the process steps and Cost of production.

Summary of the invention

In view of the above problems in the prior art, the object of the present invention is to provide a new type of steel wire rope with high structural stability, which improves the structural stability of the central wire of the steel cord by changing the method of the central steel wire structure. The steel wire rope can maintain good structural stability after long-term use of rubber and plastic products such as tires and conveyor belts, thereby increasing the service life of the product; the invention also relates to the preparation process of the steel wire rope with high structural stability.

In order to achieve the purpose of the present invention, a steel wire rope with high structural stability according to the present invention includes a central steel wire, a plurality of outer winding wires arranged around the central steel wire; the diameter of the central steel wire is d, and the central steel wire is deformed and corrected The straightener undergoes periodic deformation, the deformation height is h, and the length of a deformation is L2, where h = 1 ~ 1.3d, L2 is less than the twisting distance between the outer winding wire of the wire rope and the center wire; uniformly arranged around the center wire The distance between the adjacent outer winding wires of the multi-heel outer winding wire of the cloth is L1, where L1<0.1d.

Preferably, the diameter d of the central steel wire is ≤0.6 mm.

More preferably, the outer winding wire is 5-12 wires.

According to another object of the present invention, a manufacturing process of a steel wire rope with high structural stability according to the present invention includes the following steps:

S1: Select the corresponding center wire deformation straightener according to the thickness of the produced steel wire rope; the deformation straightener includes two rows of upper and lower rows of rollers, and the upper and lower rows of rollers are staggered; the upper row of the deformed straightener The roller is correspondingly provided with a pressing rod;

S2: By adjusting the pressure rod of the center wire deformation straightener to adjust the amount of pressing of the roller against the wire rope, a center wire with a set deformation height is produced;

S3: twisting and twisting the deformed central steel wire and the outer winding steel wire to prepare a steel wire rope;

S4: Pass the twisted steel wire rope through the second straightener to eliminate the prestress in the steel wire rope and straighten it.

Preferably, after the above step S3, a step of twisting the steel wire rope prepared in step S3 as the central strand and other outer winding strands is also included.

More preferably, the radius of curvature D of the upper and lower rows of the deformed straightener is less than 3.2 times the thickness of the wire rope, and the distance L3 between two adjacent rollers in the same row is less than the twist of the wire rope.

The steel wire rope with high structural stability of the present invention has a slight deformation, so that there is a small gap between the outer winding steel wire and the central steel wire, and it is distributed along the axial direction of the steel wire rope. The existence of small gaps can greatly improve the rubber penetration rate of the wire rope; at the same time, due to the gap between the outer winding wires, the center wire and rubber are in direct contact, and the interface between the center wire and rubber with undulation deformation It is zigzag-like, which increases the resistance of the center wire punctured in the tire, makes the structure of the skeleton material more stable, and improves the safety and service life of the tire.

BRIEF DESCRIPTION

The foregoing and other objects, features, and advantages of the present invention will become apparent through the following detailed description in conjunction with the accompanying drawings. among them:

Figure 1 is a schematic diagram of the cross-sectional structure of the steel wire rope of the present invention;

FIG. 2 is a schematic structural view of the center wire of the wire rope of FIG. 1;

Figure 3 shows a schematic diagram of the structure of the straightener for center wire deformation;

4 is a schematic diagram of a transverse cross-sectional structure of a steel rope according to an embodiment of the present invention;

FIG. 5 is a schematic diagram of a transverse cross-sectional structure of a steel rope according to another embodiment of the present invention;

FIG. 6 is a schematic diagram of the transverse cross-sectional structure of a conveyor belt to which the present invention is applied.

detailed description

The features and advantages of the present invention will be described in detail with reference to the drawings.

Referring to the schematic cross-sectional structure diagram of the steel wire rope of the present invention shown in FIG. 1, the steel wire rope with high structural stability includes a central steel wire 2, a plurality of outer winding wires 3 arranged around the central steel wire 2; The diameter is d, and the center wire 2 undergoes periodic deformation through a deformer. Its deformation height is h, and the length of a deformation is L2, where h=1 to 1.3d, L2 is less than the twist of the outer winding wire of the wire rope and the center wire. The distance between adjacent outer winding wires 3 of multiple outer winding wires evenly arranged around the center wire is L1, where L1<0.1d.

In a preferred embodiment, the diameter d of the central steel wire is ≤0.6 mm.

In a preferred embodiment, the outer wound wire 3 may be 5-12.

Refer to FIG. 3 for a schematic diagram of the straightener for center wire deformation of the steel wire rope with high structural stability of the present invention. According to the present invention, the straightener used to manufacture the center wire deformation is eliminated from the production process of the same specification steel wire rope. Compared with the straightener for torsion of the steel wire rope, it has a smaller roller diameter and roller spacing; the torsion and flatness of the steel wire rope caused by the deformation process can be adjusted with the second straightener.

Specifically, referring to FIG. 3, the steel wire deform straightener includes two rows of upper and lower rows of rollers 4, the upper and lower rows of rollers are staggered; the radius of curvature D of the rollers is less than 3.2 times the thickness of the wire rope, and two adjacent ones in the same row The distance L3 of the roller is smaller than the twisting distance of the steel wire rope; the upper row of rollers of the deformed straightener is correspondingly provided with a pressing rod 5, which can be used to carry the upper and lower rollers through the pressing rod 5 when deforming steel wires of different diameters Adjust the spacing between.

Example 1

4 is a schematic diagram of a transverse cross-sectional structure of a specific application case of a steel wire rope with high structural stability according to the present invention. The structure is a 1+8 structure, which is composed of a central wire 6 and eight wires arranged around the central wire 6 The outer winding wire 7 is composed of a central wire 6 with a diameter of 0.30mm and an outer winding wire 7 with a diameter of 0.185mm; all the steel wires are galvanized steel wires, and the deformation height of the central wire is measured by a precision profile projector as 0.345mm .

The steel wire rope 18185NT under the same specifications of the prior art was selected to compare the adhesion performance with the steel wire rope of the present invention. The rubber compound selected for the vulcanization experiment was provided by Shandong Yihe Conveyor Belt Co., Ltd. The test data is shown in Table 1 below.

As can be seen from the test data in Table 1, under the same specifications, the steel wire rope in the present invention has higher adhesion than the products in the prior art.

Example 2:

Fig. 5 is a schematic diagram of a transverse cross-sectional structure of another specific application case of a steel wire rope with high structural stability according to the present invention, and its structure is a 7×7 alternating twist structure; the steel wire rope is composed of seven strands of steel wire rope, each of which contains Seven steel wires, of which the central wire 8 in the core strand 20 is deformed, and the deformation height h can be measured by a precision contour projector; the six outer strands 30 are consistent with the prior art, and all steel wires are galvanized steel wires.

In this case, the diameter of the center wire 8 is 0.25 mm, the diameter of the outer winding wire 9 is 0.235 mm, the diameter of the outer winding center wire 11 is 0.23 mm, and the diameter of the outer winding wire 12 is 0.215 mm; The straightener deforms the center wire 8. In this case, the radius of curvature of this straightener bearing is 6.5mm, and the distance between the centerlines of adjacent bearings is 18mm. The twisted samples were untwisted and untwisted, and the center wire deformation height h = 0.268 mm was measured by a precision contour projector.

Figure 6 shows the transverse cross-sectional view of the conveyor belt product after the steel wire rope and rubber are combined in this application case. When the conveyor belt produced by the steel wire rope is used continuously for six months, only rubber wear is observed on the surface of the conveyor belt, while the conveyor belt manufactured by the steel wire rope produced under the prior art will be used continuously for four to five months. The phenomenon of puncturing of metal wires of different degrees was observed on the surface. It can be seen from the analysis of the punctured steel wire that the punctured steel wire is the center wire of the 7×7 steel wire core strand; at the same time, the CT scan of the conveyor belt and It can be seen from the anatomy that after the steel wire rope of the present invention has been continuously used for six months in the conveyor belt, although there is a wire breakage phenomenon in the central strand of the steel wire, there is no phenomenon of steel wire migration or puncture, compared with the steel wire rope under the prior art , With high structural stability.

The preparation process of the steel wire rope with high structural stability of the present invention includes the following steps:

S1: Select the corresponding center wire deformation straightener according to the thickness of the produced wire rope;

S2: By adjusting the pressure rod of the center wire deformation straightener to adjust the amount of rollers pressed into the wire rope, a center wire with a set deformation height is produced;

In the preparation process of the multi-strand steel wire rope, the method further includes the step of twisting the above-mentioned steel wire rope as a central strand and other outer winding strands.

The steel wire rope with a special structure of the present invention has a small deformation in the center wire, so that there is a small gap between the outer winding wire and the center wire, and it is distributed along the axial direction of the steel wire rope. The existence of the small gap can greatly improve the rubber material of the steel wire rope At the same time, because of the gap between the outer winding wires, the center wire and rubber are in direct contact, and the interface between the center wire and rubber with undulations is zigzag-like, which increases the center wire puncture in the tire The resistance makes the structure of the skeleton material more stable and improves the safety and service life of the tire.

The present invention is not limited to the described embodiments, and those skilled in the art may still make some amendments or changes within the disclosed scope without departing from the spirit of the present invention, so the scope of protection of the rights of the present invention is defined by the claims The scope shall prevail.

Claims

A steel wire rope with high structural stability, characterized in that the steel wire rope includes a central steel wire, a plurality of outer winding wires arranged around the central steel wire; the diameter of the central steel wire is d, and the central steel wire is straightened by deformation The device undergoes periodic deformation, the deformation height is h, and the length of a deformation is L2, where h = 1 ~ 1.3d, L2 is less than the twisting distance of the outer winding wire of the wire rope and the center wire; the wire is evenly arranged around the center wire The distance between the adjacent outer winding wires of the multi-heel outer winding wire is L1, where L1<0.1d.
The steel wire rope with high structural stability according to claim 1, wherein the diameter d of the central steel wire is ≤ 0.6 mm.
The steel wire rope with high structural stability according to claim 1 or 2, wherein the outer winding wire is 5-12 wires.
A preparation process for preparing a steel wire rope with high structural stability according to any one of claims 1 to 3, characterized in that the preparation process includes the following steps:

S1: Select the corresponding center wire deformation straightener according to the thickness of the produced steel wire rope; the deformation straightener includes two rows of upper and lower rows of rollers, and the upper and lower rows of rollers are staggered; the upper row of the deformed straightener The roller is correspondingly provided with a pressing rod;

S2: By adjusting the pressure rod of the center wire deformation straightener to adjust the amount of pressing of the roller against the wire rope, a center wire with a set deformation height is produced;

S3: twisting and twisting the deformed central steel wire and the outer winding steel wire to prepare a steel wire rope;

S4: Pass the twisted steel wire rope through the second straightener to eliminate the prestress in the steel wire rope and straighten it.
The manufacturing process of a steel wire rope with high structural stability according to claim 4, characterized in that after the step S3, it further comprises twisting the steel wire rope prepared in step S3 as the central strand with other outer strands step.
The preparation process of a steel wire rope with high structural stability according to claim 4 or 5, characterized in that the radius of curvature D of the upper and lower rows of rollers of the deformed straightener is less than 3.2 times the thickness of the steel wire rope. The distance L3 between two adjacent rollers in the row is less than the twisting length of the wire rope.