CN215210190U

CN215210190U - Steel cord with strong breaking force

Info

Publication number: CN215210190U
Application number: CN202120288661.4U
Authority: CN
Inventors: 姚凤刚; 钱国平; 陈亮; 严华
Original assignee: Zhangjiagang City Junma Steel Cord Co ltd
Current assignee: Zhangjiagang City Junma Steel Cord Co ltd
Priority date: 2021-02-02
Filing date: 2021-02-02
Publication date: 2021-12-17
Anticipated expiration: 2031-02-02

Abstract

The utility model provides a steel cord with strong breaking force, the steel cord comprises a core strand, six outer strands and an outer wire winding, the six outer strands are regularly distributed on the periphery of the core strand, the outer circumferences of the six outer strands are tangent to the outer circumference of the core strand, and the outer wire winding is wound on the outer surfaces of the six outer strands; the core strand and the outer layer strand respectively comprise 1 inner layer steel wire and 6 outer layer steel wires, and the 6 outer layer steel wires are circularly and uniformly distributed on the periphery of the inner layer steel wire; the diameters of the inner layer steel wire and the outer layer steel wire in the core strand and the outer layer strand are the same, the diameters of the inner layer steel wire and the outer layer steel wire are A and B respectively, A is more than or equal to 0.255mm and less than or equal to 0.258mm, and B is more than or equal to 0.255mm and less than or equal to 0.258 mm; the diameter of the outer winding wire is C, and C is 0.15 mm. The utility model discloses a 7x 749 silk structure has improved the breaking force of steel cord to improved the bearing capacity of tire, appropriate lay length and direction of twist, make steel cord and rubber bonding better, the rubber permeability performance is better promptly, thereby extension tire life.

Description

Steel cord with strong breaking force

Technical Field

The utility model belongs to the technical field of steel cord production, especially, relate to a steel cord with strong breaking force.

Background

The large-scale heavy-duty tire needs to have huge bearing capacity, which means that the belt layer of the large-scale heavy-duty tire needs higher impact resistance, and the steel cord is required to have strong breaking force.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problem, the utility model discloses a steel cord with strong breaking force, the breaking force of steel cord is high, and it is better from oozing the gluey performance, extension tire long service life.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

a steel cord with strong breaking force comprises a core strand, six outer strands and an outer winding wire, wherein the six outer strands are uniformly distributed on the outer peripheral side of the core strand in a regular hexagon shape, the outer circumferences of the six outer strands are tangent to the outer circumference of the core strand, and the outer winding wire is wound on the outer surfaces of the six outer strands; the core strand and the outer layer strand respectively comprise 1 inner layer steel wire and 6 outer layer steel wires, and the 6 outer layer steel wires are circularly and uniformly distributed on the periphery of the inner layer steel wire; the diameters of the inner layer steel wire and the outer layer steel wire in the core strand and the outer layer strand are the same, the diameters of the inner layer steel wire and the outer layer steel wire are A and B respectively, A is more than or equal to 0.255mm and less than or equal to 0.258mm, and B is more than or equal to 0.255mm and less than or equal to 0.258 mm; the diameter of the outer winding wire is C, and C is 0.15 mm.

Furthermore, in the core strand and the outer layer strand, the twisting direction of 6 outer layer steel wires around the inner layer steel wires is left twisting, the twisting direction of the outer layer strand around the core strand is right twisting, and the twisting direction of the outer winding wires around the outer layer strand is left twisting.

Furthermore, the diameter A of the inner layer steel wire is 0.255mm, and the diameter B of the outer layer steel wire is 0.255 mm.

The utility model discloses a preparation process flow that area has steel cord of strong breaking force does: the wire rod special for the steel cord is generally adopted, wherein the wire rod is subjected to controlled cooling and sorbitizing of phi 5.5, the wire rod after qualified in-factory inspection is subjected to surface treatment, rough drawing is carried out, the wire rod is drawn to phi 2.2-2.8 mm, then primary normalizing treatment is carried out to eliminate work hardening, then the wire rod is subjected to middle drawing, drawn to phi O.8-1.6 mm, then lead bath isothermal quenching is carried out, brass is electroplated to obtain the required mechanical property, metallographic structure and coating quality, then wet drawing is carried out to phi 0.15-0.38 mm, and finally stranding, rope forming, external winding, rewinding inspection and finished product inspection are carried out until packaging and warehousing are carried out.

The utility model discloses a 7x 749 silk structure has improved the breaking force of steel cord to improved the bearing capacity of tire, appropriate lay length and direction of twist, make steel cord and rubber bonding better, the rubber permeability performance is better promptly, thereby extension tire life.

Drawings

Fig. 1 is a schematic structural view of a steel cord with strong breaking force according to the present invention.

Wherein, 1-core strand, 2-outer layer strand, 3-inner layer steel wire, 4-outer layer steel wire and 5-outer winding wire.

Detailed Description

The present invention will be further described with reference to the accompanying drawings and specific embodiments.

Example 1

A steel cord having a strong breaking force as shown in fig. 1, the steel cord comprising a core strand 1, six outer layer strands 2 and an outer wrap 5, the six outer layer strands 2 being uniformly distributed on an outer circumferential side of the core strand in a regular hexagon, and outer circumferences of the six outer layer strands 2 being tangent to an outer circumference of the core strand 1, the outer wrap 5 being wound on outer surfaces of the six outer layer strands 2; the core strand 1 and the outer layer strand 2 both comprise 1 inner layer steel wire 3 and 6 outer layer steel wires 4, and the 6 outer layer steel wires 4 are circularly and uniformly distributed on the periphery of the inner layer steel wire 3; the diameters of the inner layer steel wire 3 and the outer layer steel wire 4 in the core strand 1 and the outer layer strand 2 are the same, the diameter A of the inner layer steel wire 3 is 0.255mm, the diameter B of the outer layer steel wire 4 is 0.255mm, and the diameter C of the outer winding wire is 0.15 mm.

In the core strand 1 and the outer strand 2, the twisting direction of 6 outer layer steel wires 4 around the inner layer steel wire 3 is left twisting, the twisting direction of the outer strand 2 around the core strand 1 is right twisting, and the twisting direction of the outer wire 5 around the outer strand 2 is left twisting.

In the core strand 1 and the outer layer strand 2, the lay length of the outer layer steel wire 4 around the inner layer steel wire 3 is 12.5 mm, the lay length of the outer layer strand 2 around the core strand 1 is 20 mm, and the lay length of the outer layer strand 2 around the outer layer wire 5 is 5 mm; the diameter of the steel cord is 2.52mm, the breaking force is 6560N, and the linear density is 19.8 g/m.

Example 2

In the core strand 1 and the outer layer strand 2, the twisting direction of 6 outer layer steel wires 4 around the inner layer steel wire 3 is left twisting, the twisting direction of the outer layer strand 2 around the core strand 1 is right twisting, and the twisting direction of the outer layer strand 2 around the outer layer strand 5 is left twisting.

In the core strand 1 and the outer layer strand 2, the lay length of the outer layer steel wire 4 around the inner layer steel wire 3 is 13 mm, the lay length of the outer layer strand 2 around the core strand 1 is 20.5 mm, and the lay length of the outer layer strand 2 around the outer layer wire 5 is 5 mm; the diameter of the steel cord is 2.65mm, the breaking force is 6480N, and the linear density is 20.49 g/m.

Those of ordinary skill in the art will understand that: the above description is only exemplary of the present invention and should not be construed as limiting the present invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The steel cord with strong breaking force is characterized by comprising a core strand, six outer strands and an outer winding wire, wherein the six outer strands are uniformly distributed on the outer peripheral side of the core strand in a regular hexagon shape, the outer circumferences of the six outer strands are tangent to the outer circumference of the core strand, and the outer winding wire is wound on the outer surfaces of the six outer strands; the core strand and the outer layer strand respectively comprise 1 inner layer steel wire and 6 outer layer steel wires, and the 6 outer layer steel wires are circularly and uniformly distributed on the periphery of the inner layer steel wire; the diameters of the inner layer steel wire and the outer layer steel wire in the core strand and the outer layer strand are the same, the diameters of the inner layer steel wire and the outer layer steel wire are A and B respectively, A is more than or equal to 0.255mm and less than or equal to 0.258mm, and B is more than or equal to 0.255mm and less than or equal to 0.258 mm; the diameter of the outer winding wire is C, and C is 0.15 mm.

2. A steel cord with high breaking force according to claim 1, characterized in that among said core strand and outer strand, 6 outer steel wires are twisted left around the inner steel wires, the outer strand is twisted right around the core strand, and the outer wire is twisted left around the outer strand.

3. A steel cord with high breaking force according to claim 1, characterized in that said inner layer steel wire diameter a is 0.255mm and said outer layer steel wire diameter B is 0.255 mm.