CN206646324U - A kind of open type steel cord - Google Patents
A kind of open type steel cord Download PDFInfo
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- CN206646324U CN206646324U CN201620541329.3U CN201620541329U CN206646324U CN 206646324 U CN206646324 U CN 206646324U CN 201620541329 U CN201620541329 U CN 201620541329U CN 206646324 U CN206646324 U CN 206646324U
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- steel
- steel cord
- cord
- steel wire
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Abstract
The utility model provides a kind of steel cord, the steel cord has open structure, steel cord includes n root steel wires, n roots steel wire is twisted together according to the cord lay pitch, steel wire is by spiral shape predeformation, steel cord has fracture elongation between 3.0% to 5.0%, and steel cord 50N load elongation percentage between 0.6% to 1.5%.The steel cord has good rubber osmosis performance.The utility model also provides a kind of tire strengthened with steel cord.
Description
Technical field
It the utility model is related to a kind of open type steel cord.The utility model further relates to a kind of including open type steel cord
Rubber, such as tire.
Background technology
Manufactured rubber-steel cord complex with steel cord enhancing rubber, has good intensity and rigidity, therefore,
It is widely used in the various rubbers such as tire, conveyer belt, flexible pipe.
The steel cord of high rubber osmosis rate is that market is pursued.Such as when being used to strengthen tire by steel cord, steel curtain
The rubber osmosis rate of line is higher, and the fatigue resistance of steel cord is also better.For the high steel cord of rubber osmosis rate, between steel wire
Contact lack, friction it is low, therefore, the abrasion of steel wire is also low.Further, since rubber osmosis into steel cord, can allow in steel cord
The space that aqueous vapor penetrates into is also few, and the chance that steel cord is corroded is also few.Therefore the high steel cord of rubber osmosis rate has very
Good anti-fatigue performance, and usage time is grown, and when applied to enhancing tire, the service life of tire is also grown.Therefore, for
For steel cord, its rubber osmosis performance is very important.
An approach for improving steel cord rubber osmosis rate is that steel cord is made into opening structure.
WO88/05612 discloses a kind of open type steel cord, and the open type steel cord has the structure of n × 1, its
Fractional load elongation percentage between 2.5N and 50N is between 0.2-0.45%.Although shown in the performance test of steel cord
(gained rubber osmosis performance is prepared into cord to good rubber osmosis performance simply by by steel cord in steel cord performance test
Test after layer, rather than tested after being prepared into tire), or even full strike-through is realized, but in actual tire manufacturing process, than
Such as in the calendering of cord, tire building and tire vulcanization process, steel cord all can be caused steel by different degrees of tension force
The degree of opening of cord is weakened, that is to say, that the open architecture of steel cord can be consumed, and degree of opening can reduce, from tire
Find that the problem of incomplete strike-through occurs in steel cord after peeling off steel cord.
In addition, steel cord in light weight is also what market was pursued.When steel cord is used for into automobile tire, in order to save combustion
The consumption of oil, usually requires that rolling resistance is the smaller the better.Reduce casing ply weight be reduce tire drag approach it
One, the weight for reducing steel cord is one of method for effectively reducing cord layer weight, can aid in and is ensureing casing ply
Reduce the weight of casing ply in the case of intensity.
US6247514 discloses a kind of steel cord, the wherein tensile strength of steel wire on 4400-2000DMPa because
Employ the steel wire of high-tensile, it is possible to which steel cord, resulting steel cord are prepared using the steel wire of smaller diameter
With it is in light weight the advantages of.But find in actual applications the steel cord glue permeation performance that is only made up of high-tensile steel wires and
Anti-fatigue performance needs to improve.
Therefore, it is necessary to develop the steel cord that strike-through performance is more preferable, weight is lighter.
Utility model content
Primary and foremost purpose of the present utility model is that solve above-mentioned existing technical problem.
Another purpose of the present utility model is to provide a kind of full strike-through steel cord in light weight.
Further object of the present utility model is to provide a kind of tire, and its reinforcement is full strike-through steel cord in light weight.
According to the purpose of this utility model, there is provided a kind of steel cord, steel cord have open structure, and steel cord includes n
Root steel wire, steel cord have fracture elongation between 3.0% to 5.0%, and steel cord exists in the elongation percentage of 50N load
Between 0.6% to 1.5%, n roots steel wire is twisted together according to the cord lay pitch, and every steel wire is by spiral shape predeformation.
By simultaneously control steel cord fracture elongation and steel cord in the elongation percentage of 50N load, obtained steel cord
Will not excessively it be opened with sufficient open architecture but its open architecture.Sufficient open architecture means in use, such as
When being prepared into casing ply and being applied to tire, after casing ply calendering operation and tire building and vulcanisation operation process, steel curtain
The open architecture of line is still very abundant, that is to say, that the cord lamination when open architecture of steel cord can't be prepared because of tire
Prolong operation and tire building and vulcanisation operation and be consumed, rubber still can be penetrated into fully in steel cord, and steel cord is realized
Real full strike-through, abrasion of the steel cord in tire between middle steel wire can be so reduced, and reduce steel cord in tire
The middle possibility corroded, thus improve the anti-fatigue performance of steel cord.Although the degree of opening of steel cord of the present utility model
Very fully, but also there is control, because the degree of opening of steel cord, nor the higher the better, Exploitation degree is higher, and rubber osmosis is got over
It is good, but steel cord is excessively open, can reduce the effect of steel cord banding about tires.
Preferably, steel cord in the elongation percentage of 50N load between 0.7% to 1.2%.Steel wire in such steel cord
Predeformation amount and steel cord the cord lay pitch be easier realize.
According to the utility model, it is preferable that every steel wire has diameter D in 0.15mm between 0.30mm；It is highly preferred that
Every steel wire has diameter D in 0.17mm between 0.25mm.Preferably, steel wire all in steel cord has identical straight
Footpath., it is necessary to improve the tensile strength of steel wire to ensure that steel cord has enough rupture pull forces while reducing steel wire diameter.
Preferably, there is every steel wire tensile strength TS to meet following equation：TS≥(3800-2000×D)MPa；It is more excellent
There is tensile strength TS to meet following equation for selection of land, every steel wire：TS≥(4100-2000×D)MPa；Most preferably, every steel
There is silk tensile strength TS to meet following equation：TS≥(4400-2000×D)MPa.The tensile strength numerical value of steel wire is by steel wire
Gained is measured after being peeled off from steel cord.The application of high-tensile steel wires, coordinate the fracture elongation and steel of control steel cord
Cord 50N load elongation percentage, can keep steel wire intensity in the case of reduce gauge of wire, can so cause
Steel cord remains to keep enough open architectures in the smaller lay pitch, that is to say, that steel cord degree of opening is constant and cord is twisted with the fingers
Away from diminishing, such steel cord rupture pull force is higher, and steel cord diameter is smaller, and prepared cord is thinner, and steel cord is realized oozes entirely
Glue, obtained tire is also lighter and service life is longer.In other words, the tensile strength of steel wire is higher, gauge of wire
Can be with smaller, when the cord lay pitch is constant, the degree of opening of steel cord is higher.
According to the utility model, steel wire passes through predeformation before steel cord is twisted into steel cord.The predeformation of steel wire
For spiral shape predeformation.The spiral shape predeformation of steel wire is steel wire is presented spiral shape, for example, guiding steel wire by sleeve or
Spiral shape predeformation obtained by person's disk, so not being dimensional waveform, nor spiral waveform.Predeformation will be passed through by measurement
Steel wire afterwards is twisted into the external diameter again justified the external envelope of steel wire obtained from steel cord backtwisting after steel cord, and steel is measured with this
The predeformation amount of silk.The external diameter of the external envelope circle of predeformation steel wire can be measured by micrometer, and the micrometer is dish-type thousand
Divide chi, including the disk positioned at the end of micrometric screw, the disk diameter is not less than 20mm, and such micrometer can be quickly simple
Just the envelope circle external diameter of measurement predeformation steel wire.The method for measuring external envelope circle external diameter is as follows：1) dish-type micrometer is set
Distance is a certain value between gage button, such as 600 μm, 2) steel cord sample (general 100mm length) is taken, steel cord backtwisting is obtained into list
Root steel wire, in one end of steel wire (general 15mm length) do one it is curved；3) will be imported with curved steel wire in gage button, and steel wire keeps hanging down
Directly it is erected between disk；4) adjustment reduces the distance between gage button with clamping steel wire, such as 550 μm, is removing steel wire
External force help after can be independent stand vertically among the disk of gage button；5) adjustment increases the distance between gage button to loosen steel
Silk, such as 555 μm, still stood vertically as steel wire remains stationary as among disk, then understand the external envelope circle of now steel wire
External diameter is more than 555 μm；6) the step of repeating above, continue to tune up the distance between gage button, such as 560 μm；7) before repeating
The step of until as steel wire becomes greater than 30 ° of inclination from standing vertically in disk, now the distance between gage button as steel wire
External envelope circle external diameter I；8) the distance between gage button is unclamped in adjustment, and steel wire is carried out into 90 ° of rotations, repeat before the step of enter
Row test obtains the external envelope circle external diameter II of steel wire；9) average value of external envelope circle external diameter I and II is the external envelope circle of steel wire
External diameter.Preferably, there is every steel wire external envelope circle external diameter to be more than 3.0 × D mm, preferably less than 5.0 × D mm.
Preferably, the cord lay pitch of steel cord in 6mm between 14mm.Coordinate the predeformation of steel wire and suitable steel wire
Diameter, steel cord can be made to reach sufficient open architecture.
Steel wire quantity is too low in steel cord, and steel cord rupture pull force is too low；Steel wire excessive number, steel cord void is too
It is more, cause steel cord excessively loose.Preferably, steel wire quantity n is 3 or 4 in steel cord.
According to another purpose of the present utility model, there is provided a kind of tire, including belt, carcass and bead part, it is described
Belt includes an at least steel cord, and steel cord has open structure, and steel cord includes n root steel wires, and steel wire is according to cord
The lay pitch is twisted together, steel wire be by spiral shape predeformation, steel cord have fracture elongation 3.0% to 5.0% it
Between, and steel cord 50N load elongation percentage between 0.6% to 1.5%.Resulting tire is lighter, service life is longer.
Brief description of the drawings
1. Fig. 1 shows one embodiment of the present utility model.
2. Fig. 2 shows another embodiment of the present utility model.
Embodiment
According to the utility model, steel cord is made up of n root steel wires.Steel wire can be high-carbon steel wire, and carbon content about exists
0.70% or more, for example, carbon content 0.78-1.025%, manganese content 0.30%-1.10%, silicone content 0.15%-1.30%,
Sulfur content is no more than 0.15%, and phosphorus content is no more than 0.02%, is weight/mass percentage composition, furthermore, it is possible to also include additionally adding
Some microalloy elements added, such as 0.20%-0.40% chromium, 0.20% or less copper, 0.30% or less vanadium,
For weight/mass percentage composition.
First by mechanical derusting and/or by H2SO4 or HCl solution carry out chemical pickling come clean wire rod so as to
Remove the oxide on surface.Then wire rod is rinsed in water, then dried.Then to carrying out the through dry wire rod
One group of dry drawing pulls out operation to reduce diameter until the first mid diameter.
At first mid diameter, such as at about 3.0 to 3.5mm, the first intermediate heat is carried out to dry drawn steel wire
Processing, is referred to as making annealing treatment.Then the steel wire is ready for next step mechanically deform.
Afterwards, it is drawn to steel wire is further dry in second group of reducing step since the first mid diameter among second
Diameter.Second mid diameter is usually 1.Omm to 2.5mm.
At second mid diameter, the second annealing is carried out to steel wire so as to be transformed into pearlite.
, can be to the steel wire coating coat of metal after second annealing, the coat of metal can be known any
Kind promotes the coating of steel cord and rubber adhesion, such as known binary, ternary or quaternary alloy coating, for example copper is plated on
It is plated on steel wire and by zinc on copper, then carries out heat diffusion treatment to form brass coating.The coat of metal can be known
Any thickness, such as 0.2 μm.
In addition, steel wire can coat organic functions silane coating further to improve steel wire and rubber on brass coating
Between bonding force.
Then final one group of tube reducing process is carried out to steel wire by wet drawbench.Steel wire is that tensile strength is generally high after wet drawing
In 4100-2000 × D MPa, D is steel wire diameter, and suitable for the round wire of rubber reinforcement.
The final diameter of steel wire is 0.15mm to 0.30mm, such as 0.17mm, 0.21mm, 0.28mm, 0.30mm.More preferably
Ground, control steel wire final diameter for 0.17mm between 0.25mm.
Predeformation is carried out by pre-deformation device to steel wire again.Predeformation is spiral shape predeformation, passes through sleeve or circle
Disk is come the spiral shape predeformation made.The predeformation amount of steel wire can pass through measuring steel wire after steel wire is peeled off from steel cord
External envelope circle external diameter obtains.
Ready n roots steel wire is twisted, obtains steel cord of the present utility model.Can be by controlling the cord lay pitch, steel
The predeformation amount of silk diameter and/or steel wire, gained steel cord fracture elongation of the present utility model and the extension in 50N load
Rate within the scope of determining, that is, steel cord fracture elongation between 3.0% to 5.0%, and steel cord is in 50N load
Elongation percentage between 0.6% to 1.5%, ensure that the abundant degree of opening of steel cord.It should be noted that due to predeformation
With the influence of twisting operation, the tension that the tensile strength of the steel wire being stripped out in final steel cord is less than steel wire after wet drawing is strong
Degree.
One embodiment of the present utility model is 3 × 1 open type steel cords.The steel cord 100 is pressed by 3 steel wires 105
Cord lay pitch twisting forms.The diameter of steel wire 105 is 0.30mm.The cord lay pitch is 14mm.The fracture elongation of steel cord 100 is
3.45%, its elongation percentage in 50N is 0.78%.The rubber osmosis rate of steel cord 100 is 100%.Steel wire 105 is from steel cord
The tensile strength surveyed after being peeled off in 100 is 3325MPa, and external envelope circle external diameter is 1.1mm.
Second embodiment of the present utility model is 4 × 1 open type steel cords.The steel cord 200 is pressed by 4 steel wires 205
Cord lay pitch twisting forms.The diameter of steel wire 205 is 0.21mm.The cord lay pitch is 8mm.The fracture elongation of steel cord 200 is
3.83%, its elongation percentage in 50N is 0.90%.The rubber osmosis rate of steel cord 200 is 100%.Steel wire 205 is from steel cord
The tensile strength surveyed after being peeled off in 200 is 3781MPa, and external envelope circle external diameter is 0.71mm.
Rubber osmosis rate 100% shows that the utility model steel cord realizes full strike-through, and rubber osmosis is into steel cord
Space between steel wire.Rubber osmosis rate can be learnt by existing method of testing, such as drop test.
In addition, when application steel cord of the present utility model enhancing tire, surveyed after steel cord is peeled off from wheel tyre cavity
The rubber osmosis rate of dimension cord finds, steel cord by tire preparation process especially casing ply calendering and tire building and
After sulfidation, steel cord has remained in that full strike-through.This shows that the degree of opening of steel cord does not have the preparation because tire
Process and substantially reduce, this has very big improvement compared with prior art, that is to say, that steel cord of the present utility model is compared
There is more stable and more fully open architecture in prior art.
Claims (11)
1. a kind of steel cord, the steel cord has open structure, and the steel cord includes n root steel wires, the steel cord tool
Have fracture elongation between 3.0% to 5.0%, and the steel cord 50N load elongation percentage 0.6% to 1.5% it
Between, it is characterised in that the n roots steel wire is twisted together according to the cord lay pitch, the steel wire be by spiral shape predeformation,
There is the steel wire external envelope circle external diameter to be more than 3.0 × D mm and be less than 5.0 × D mm, and wherein D is the gauge of wire.
2. a kind of steel cord according to claim 1, it is characterised in that the steel cord exists in the elongation percentage of 50N load
Between 0.7% to 1.2%.
A kind of 3. steel cord according to claim 1 or 2, it is characterised in that the steel wire have diameter D in 0.15mm extremely
Between 0.30mm.
4. a kind of steel cord according to claim 3, it is characterised in that the diameter D is in 0.17mm between 0.25mm.
5. a kind of steel cord according to claim 1 or 2, it is characterised in that the steel wire has tensile strength TS satisfactions
Following equation：TS≥(3800-2000×D)MPa.
6. a kind of steel cord according to claim 5, it is characterised in that it is following that there is the steel wire tensile strength TS to meet
Formula：TS≥(4100-2000×D)MPa.
7. a kind of steel cord according to claim 6, it is characterised in that it is following that there is the steel wire tensile strength TS to meet
Formula：TS≥(4400-2000×D)MPa.
A kind of 8. steel cord according to claim 1 or 2, it is characterised in that the cord lay pitch 6mm to 14mm it
Between.
9. a kind of steel cord according to claim 1 or 2, it is characterised in that the n is 3 or 4.
10. a kind of steel cord according to claim 1 or 2, it is characterised in that the spiral shape predeformation is guiding steel wire
Spiral shape predeformation as obtained by sleeve or disk.
11. a kind of tire, including belt, carcass and bead part, the belt includes at least one such as claim 1-10
Any one of steel cord.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620541329.3U CN206646324U (en) | 2016-06-06 | 2016-06-06 | A kind of open type steel cord |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620541329.3U CN206646324U (en) | 2016-06-06 | 2016-06-06 | A kind of open type steel cord |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206646324U true CN206646324U (en) | 2017-11-17 |
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ID=60282246
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620541329.3U Active CN206646324U (en) | 2016-06-06 | 2016-06-06 | A kind of open type steel cord |
Country Status (1)
| Country | Link |
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| CN (1) | CN206646324U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3530485B1 (en) | 2018-02-22 | 2020-08-26 | Sumitomo Rubber Industries, Ltd. | Pneumatic tire |
-
2016
- 2016-06-06 CN CN201620541329.3U patent/CN206646324U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3530485B1 (en) | 2018-02-22 | 2020-08-26 | Sumitomo Rubber Industries, Ltd. | Pneumatic tire |
| EP3530485B2 (en) † | 2018-02-22 | 2023-11-01 | Sumitomo Rubber Industries, Ltd. | Pneumatic tire |
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