CN203755071U

CN203755071U - Steel cord thread

Info

Publication number: CN203755071U
Application number: CN201420098656.7U
Authority: CN
Inventors: 刘臣; 崔世云; 张磊; 顾军
Original assignee: JIANGSU BAOSTEEL PRECISION STEEL WIRE CO Ltd
Current assignee: JIANGSU BAOSTEEL PRECISION STEEL WIRE CO Ltd
Priority date: 2014-03-05
Filing date: 2014-03-05
Publication date: 2014-08-06
Anticipated expiration: 2024-03-05

Abstract

A steel cord thread is formed by weaving 7 strands of 27 steel wires and an outward-wound steel wire, the sections of the steel wires are circular, the section of the strands is noncircular, the 27 steel wires form the strands, and each strand sequentially comprises a core strand layer, an inner layer and an outer layer from interior to exterior, each core strand layer is composed of three steel wires, each inner layer is composed of nine steel wires, each outer layer is composed of fifteen steel wires, and the 3+9+15 structural mode is adopted. The twisting directions of the steel wires of the core strand layers, the steel wires of the inner layers and the steel wires of the outer layers of the strands are the same, the twisting direction of the steel wires between the strands is different from the twisting direction of the strands, and the twisting direction of the outward-wound layer, namely the outward-wound steel wire is opposite to the twisting direction of the steel wires between the strands. The steel cord thread has the main advantages of being high in intensity, good in fatigue performance, high in bearing capability and stable in performance, can well protect tires, can effectively prevent serious consequences of tire bursting caused by the serious conditions of the tires, and enables the tires to have the capability of small rolling resistance and long service life.

Description

A kind of steel cord

Technical field

The utility model relates to a kind of steel cord, is mainly used among engineering automobile tire, as the reinforcing element of tire.

Background technology

According to the plan of national Ministry of Industry and Information, by 2015, car tyre meridian rate reached 100%, and light load-carrying tire meridian rate reaches 85%, and heavy sevice type meridian rate reaches 90%; Focus on the exploitation of engineering radial-type tyre, radial air tire and slow-moving vehicle radial." tire industry policy " is clear and definite, and newly-built, reorganization and expansion truck radial project once forms production capacity and should reach annual output more than 1,200,000; Newly-built, reorganization and expansion light truck radial and radial tyre of passenger car project, once form production capacity and should reach and produce per year more than 6,000,000.Newly-built, reorganization and expansion load-carrying, light load-carrying, radial tyre of passenger car mixed type project, single variety production capacity also must reach above-mentioned requirements.The mechanical tire of newly-built, reconstruction and extension project (except giant engineering machinery tyre) project, once forms production capacity and should reach annual output more than 30,000.Till the end of the year 2013, the meridian rate of car tyre is about 95% left and right, and the meridian rate of heavy sevice type is about 70% left and right, and engineering tire meridian rate is also more and more higher.For the call of respective country, improve the meridian rate of engineering automobile tire, the present invention arises at the historic moment.

Summary of the invention

The purpose of this utility model is to design a kind of steel cord; have that intensity is high, fatigue behaviour good, bearing capacity is strong, the main feature of stable performance; tire is played a very good protection; not only effectively prevent that tire from causing the serious consequence of blowing out severe in the situation that, also make tire possess that resistance to rolling is little, the ability of long service life.

For achieving the above object, the technical solution of the utility model is:

A kind of steel cord, it is worked out around steel wire outside adding 1 by 7 strands of 27 steel wires, and wherein section of steel wire is circular, and strand cross section is non-circular; Described 27 steel wires form one rope, and it comprises core thigh layer, internal layer, skin from inside to outside successively, and wherein, core thigh layer is made up of 3 steel wires, and internal layer is made up of 9 steel wires, and skin is made up of 15 steel wires, and version is 3+9+15; Core thigh layer, internal layer and the outer field steel wire of this strand are twisted with the fingers to being in the same way, steel wire between strand and strand twist with the fingers to the sth. made by twisting of strand to contrary; And described outer around layer outside 1 around the sth. made by twisting of steel wire to and described strand between sth. made by twisting to contrary.

Further, between described strand steel wire and steel wire, for line contacts, between strand and strand, be face contact.

Described steel wire diameter is 0.10～0.40mm.

The core thigh layer wire pitch of described strand is less than or equal to the described steel wire of internal layer lay pitch, and the described steel wire of internal layer lay pitch is less than or equal to the described cover wire lay pitch; And the lay pitch between strand and strand is greater than the lay pitch of strand.

Described steel wire adopts regular tenacity NT or high strength HT or superhigh intensity ST or Extra High Strength UT steel wire.

The beneficial effects of the utility model:

What the utility model steel cord adopted is the steel wire use line contact structures of composition strand, and the structure that between strand and strand, employing face contacts, thereby be more conducive to the raising of the overall fatigue behaviour of steel cord, also improved service life and the security performance of tire product simultaneously.

Brief description of the drawings

Fig. 1 is the structural representation of the utility model embodiment.

Detailed description of the invention

Referring to Fig. 1, a kind of steel cord of the present utility model, its strand 1 being formed by 7 strands of 27 steel wires is worked out around steel wire 2 outside adding 1, and wherein section of steel wire is circular, and strand 1 cross section is non-circular; Described 27 steel wires form one rope 1 (taking strand 1 as example, lower same), it comprises core thigh layer 11, internal layer 12, outer 13 from inside to outside successively, wherein, core thigh layer 11 is made up of 3 steel wires, internal layer 12 is made up of 9 steel wires, and outer 13 are made up of 15 steel wires, and version is 3+9+15; The core thigh layer 11 of this strand 1, internal layer 12 and outer 13 steel wire are twisted with the fingers to being in the same way, the steel wire sth. made by twisting between strand and strand to the sth. made by twisting of strand to contrary; And described outer around layer outside 1 around the sth. made by twisting of steel wire 2 to and described strand between sth. made by twisting to contrary.

Further, between described strand 1 steel wire and steel wire, for line contacts, between strand and strand, be face contact.

Described steel wire diameter is 0.10～0.40mm.

Core thigh layer 11 wire pitch of described strand are less than or equal to described internal layer 12 wire pitches, and described internal layer 12 wire pitches are less than or equal to described skin 13 wire pitches; And the lay pitch between strand and strand is greater than the lay pitch of strand.

Embodiment

A kind of steel cord, 7 × (3+9+15 × 0.245)+0.245HT, its chief component element filament diameter is 0.245mm, intensity is high strength (High Tensile, is abbreviated as HT), and strength range is 2700～3000N/mm2, the core thigh layer of strand is made up of 3 steel wires, be 3 × 0.245, the lay pitch is 6.3mm, twists with the fingers to twisting with the fingers for Z; The internal layer of strand is made up of 9 steel wires, is 3+9 × 0.245, and the lay pitch is 12.5mm, twists with the fingers to twisting with the fingers for Z; The skin of strand is made up of 15 steel wires, is 3+9+15 × 0.245, and the lay pitch is 18mm, twists with the fingers to twisting with the fingers for Z; The twisting of strand and strand is 7 × (3+9+15 × 0.245), and the lay pitch is 55mm, twists with the fingers to twisting with the fingers for S; Be made up of 1 steel wire around layer outward, diameter is 0.245mm, and intensity is high strength (High Tensile, is abbreviated as HT), is 7 × (3+9+15 × 0.245)+0.245HT, and the lay pitch is 5mm, twists with the fingers to twisting with the fingers for Z.More than the rupture pull force of above-mentioned steel cord can reach 22300N.

Claims

1. a steel cord, is characterized in that, adds 1 work out around steel wire outward by 7 strands of 27 steel wires, and wherein section of steel wire is circular, and strand cross section is non-circular; Described 27 steel wires form one rope, and it comprises core thigh layer, internal layer, skin from inside to outside successively, and wherein, core thigh layer is made up of 3 steel wires, and internal layer is made up of 9 steel wires, and skin is made up of 15 steel wires, and version is 3+9+15; Core thigh layer, internal layer and the outer field steel wire of this strand are twisted with the fingers to being in the same way, steel wire between strand and strand twist with the fingers to the sth. made by twisting of strand to contrary; And described outer around layer outside 1 around the sth. made by twisting of steel wire to and described strand between sth. made by twisting to contrary.

2. steel cord according to claim 1, is characterized in that, between described strand steel wire and steel wire, for line contacts, is face contact between strand and strand.

3. steel cord according to claim 1 and 2, is characterized in that, described steel wire diameter is 0.10～0.40mm.

4. steel cord according to claim 1 and 2, is characterized in that, the core thigh layer wire pitch of described strand is less than or equal to the described steel wire of internal layer lay pitch, and the described steel wire of internal layer lay pitch is less than or equal to the described cover wire lay pitch; And the lay pitch between strand and strand is greater than the lay pitch of strand.

5. steel cord according to claim 3, is characterized in that, the core thigh layer wire pitch of described strand is less than or equal to the described steel wire of internal layer lay pitch, and the described steel wire of internal layer lay pitch is less than or equal to the described cover wire lay pitch; And the lay pitch between strand and strand is greater than the lay pitch of strand.