CN109373705A - Deformation instability control method caused by a kind of fabric surface uneven heating is even - Google Patents
Deformation instability control method caused by a kind of fabric surface uneven heating is even Download PDFInfo
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- CN109373705A CN109373705A CN201811127691.6A CN201811127691A CN109373705A CN 109373705 A CN109373705 A CN 109373705A CN 201811127691 A CN201811127691 A CN 201811127691A CN 109373705 A CN109373705 A CN 109373705A
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- fabric
- fabric surface
- roller bearing
- uneven heating
- frictional force
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B3/00—Drying solid materials or objects by processes involving the application of heat
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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Microbiology (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Looms (AREA)
- Treatment Of Fiber Materials (AREA)
Abstract
The invention discloses a kind of fabric surface uneven heating it is even caused by deformation instability control method, include the following steps: S1, capacitance sensor be placed in different fabric surfaces, to realize the acquisition of the data of the Temperature and Humidity module of fabric surface；S2, the pressure driver containing roller bearing control the frictional force of beam of a loom based on collected data of the Temperature and Humidity module driving roller bearing: 1) when the moisture content of fabric is lower than textile processes parameter value, indicate that the heating degree of fabric surface is higher, it then drives roller bearing to be detached from fabric surface by pressure driver, does not generate friction to fabric；2) when the moisture content of fabric is higher than process design parameter value, indicate that the moisture content of fabric is higher, then drive roller bearing that will pressurize to fabric surface by pressure driver, increase the frictional force between fabric and beam of a loom, and by the adjustment of frictional force, avoid the uneven heating of fabric is even fabric surface is caused to deform.The present invention may be implemented fabric surface uneven heating it is even caused by deformation instability control.
Description
Technical field
The present invention relates to textile technology fields, and in particular to deformation instability control caused by a kind of fabric surface uneven heating is even
Method processed.
Background technique
Under " multi items are coaxial " production method, since the moisture content of different fabric surfaces is different, the feature of neatly is generated
Difference, therefore easily cause the unstable failure of yarns in worsted fabric coating in fabric surface heat-shock or fall off and fabric
Gap it is unbalanced, so as to cause the spontaneous deformation instability of fabric surface.
Summary of the invention
To solve the above problems, the present invention provides a kind of fabric surface uneven heating it is even caused by deformation instability controlling party
Method.
To achieve the above object, the technical scheme adopted by the invention is as follows:
Deformation instability control method caused by a kind of fabric surface uneven heating is even, characterized by the following steps:
S1, capacitance sensor is placed in different fabric surfaces, to realize the acquisition of the data of the Temperature and Humidity module of fabric surface；
S2, the pressure driver containing roller bearing are carried out based on frictional force of the collected data of the Temperature and Humidity module driving roller bearing to beam of a loom
Control；
1) it when the moisture content of fabric is lower than textile processes parameter value, indicates that the heating degree of fabric surface is higher, then leads to
Over-voltage power drive drives roller bearing to be detached from fabric surface, does not generate friction to fabric；
2) it when the moisture content of fabric is higher than process design parameter value, indicates that the moisture content of fabric is higher, then passes through pressure
Driver driving roller bearing will pressurize to fabric surface, the frictional force between increase fabric and beam of a loom, and by the adjustment of frictional force,
Avoid the uneven heating of fabric is even fabric surface is caused to deform.
The invention has the following advantages:
Based on the adjusting of the frictional force between fabric and beam of a loom, the heated adjustment of fabric surface is realized, so as to avoid
Fabric surface is caused to deform since fabric surface uneven heating is even.
Detailed description of the invention
Fig. 1 is the working principle of friction testing unit.
Specific embodiment
In order to which objects and advantages of the present invention are more clearly understood, the present invention is carried out with reference to embodiments further
It is described in detail.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, it is not used to limit this hair
It is bright.
On the basis of parsing fabric tension, being squeezed and deformed instability Mechanism, we apply one small to all fabric surfaces
The disturbance of wave amplitude, by judge external disturbance expand at any time or decaying come determine surface whether unstability.For this purpose, we are from knitting
Object surface through to broadwise both direction apply disturbance r (θ, z, t), it may be assumed that r (θ, z, t)=b+ δ (t) cos (n θ) cos (ω
Z), wherein δ (t) indicates the small sample perturbations wave amplitude with Temporal Evolution, and δ < < a-r0.It is represented according to r (θ, z, t) simultaneously
Disturbance, the average curvature of fabric surface can be exported, and parsed in terms of following two.
1. body is spread
It assumes initially that fabric surface pattern is dominated by body diffusion, then defines the void concentration of different fabrics, and by
Laplace's equation describes the distribution of void concentration.According to Fick's law (being the law for handling various diffusion mass transfer processes),
The flow J that fabric void moves radiallyiMeet following relationship, it may be assumed that
(i=1,2,3 indicate the fabric of 3 kinds of different cultivars)
In above formula, DiFor diffusion coefficient.The then condition of continuity of flow and void concentration at the r=a of interface are as follows: J1(t)=J2
(t)=J3(t), c1(t)=c2(t)=c3(t), then fabric surface deformation evolution defers to following equation, it may be assumed that
Wherein ΩiExpression proposes the volume of diffusion zone.
On this basis, the void concentration of fabric meets gibbs-Thomson equation (for calculating critical nucleus radius
One equation), while considering the boundary condition and the condition of continuity of different fabric surface deformations, and assume that the gap between fabric is flowed
Amount is zero, then can determine through the undetermined constant in Laplace's equation general solution, and the void concentration point in different fabrics
Cloth.Meanwhile by void concentration distribution and Ji, fabric surface unstability EVOLUTION EQUATION can be acquired.In turn, to disturbance quantity r (θ, z, t) into
Row integral, obtains disturbance wave amplitude expression formula as follows.
Wherein
δ in above formula0For initial disturbance wave amplitude, τvFor an important critical parameter, it is mainly used to judge different fabric surfaces
Whether unstability.If τv> 0 disturbs wave amplitude exponential increase at any time, then determines fabric surface unstability；If τv< 0, disturbance wave amplitude with
The decaying of time exponentially then determines that fabric surface is stablized.And critical condition is by τv=0 definition.
2. diffusion into the surface
According to warp tension mechanical model under one axis of a kind[24], then the normal velocity of fabric surface evolution indicates are as follows:
D in formulasFor surface diffusion coefficient, ΩsFor the volume of atom in fabric, ρ0For per unit area on fabric surface
Atom number, ΔsFor surface laplacian operator.
Because diffusion into the surface occurs over just fabric surface, under the premise of not considering that stress field influences, diffusion depends on table
Face curvature, and it is unrelated with fabric yarn texture.Therefore fabric surface average curvature is substituted into the normal direction speed that fabric surface develops
Calculation formula is spent, is obtained:
The Evolution of disturbance wave amplitude is obtained by above formula as a result, it may be assumed that
Wherein τs=-(ω2b2+n2)(ω2b2+n2-1)
Equally, τsAs an important critical parameter, be mainly used to judge different fabric surfaces whether unstability.If τs>
0, wave amplitude exponential increase at any time is disturbed, then determines fabric surface unstability；If τs< 0, disturbance wave amplitude at any time decay by exponentially,
Then determine that fabric surface is stablized.Critical condition is by τs=0 definition.
The specific control method formed as a result, is as follows: being changed by the temperature and humidity of fabric surface, passes through a pressure containing roller bearing
Power drive driving roller bearing controls the frictional force of beam of a loom；Specifically comprise the following steps:
S1, capacitance sensor being placed in different fabric surfaces, the aqueous vapor of fabric surface enters in the venthole of sensor,
The variation for causing dielectric constant in sensor leads to the variation of capacitance, the i.e. variation of the temperature and humidity of fabric surface, causes capacitor
The variation of value, using this electric physical property, to realize the acquisition of the data of the Temperature and Humidity module of fabric surface；
S2, the pressure driver containing roller bearing are carried out based on frictional force of the collected data of the Temperature and Humidity module driving roller bearing to beam of a loom
Control.
1) when the moisture content of fabric is lower than textile processes parameter value (in the microprocessor by software interface setting), table
Show that the heating degree of fabric surface is higher, then drives roller bearing to be detached from fabric surface by pressure driver, fabric is not generated and is rubbed
It wipes；
2) when the moisture content of fabric is higher than process design parameter value, indicate that the moisture content of fabric is higher, and work as fabric
Moisture content increase to a certain extent after, fabric gap is fully taken up by hydrone, superfluous moisture after fabric moisture
Son can only be adsorbed on fabric surface, form water membrane, and moisture film makes fabric be easy to happen neatly in weaving process, and superfluous
Hydrone it is more, the hydroplaning phenomena of fabric surface is more obvious.For this purpose, then driving roller bearing that will give fabric table by pressure driver
Face pressurization, increases the frictional force between fabric and beam of a loom, and by the adjustment of frictional force, avoids the uneven heating of fabric is even from causing
Fabric surface deformation.
The control algolithm of this specific implementation is as follows:
In Fig. 1, N is pressure of the object to beam of a loom surface, and α is the angle of horizontal plane and axial plane, and F is object gravity along inclined-plane
Component, according to frictional theory, if, then there is following relationship in mf coefficient of friction between fabric and driver roller bearing:
F=N*mf=N*tg θ
When beam of a loom operating, F is equal to frictional force.And as α=0, fabric is rotated with beam of a loom.If F1For fabric and beam of a loom it
Between frictional force, F2It is driver roller bearing to the curable grip of fabric, mf is the coefficient of sliding friction, then there is following relational expression, it may be assumed that
F=F1+F2, and F1=N*mf
And F2It is that fabric surface stretches accelerated motion, then there is F2=ma=G/ (ga), wherein a is the acceleration of fabric movement
Degree, g is acceleration of gravity, willSubstitute into F2, obtain
Meanwhile according to friction rule of the fabric on driver roller bearing it is found that L=1/2at2, wherein L is sliding distance, t
For sliding time, and substituted into F2, obtain: F2=(N/cos θ * g) * 2L/t2.That is: N*mf=N*tg θ-(N/cos θ * g) *
2L/t2, then mf=tg θ -2L/g*t2*cosθ。
By above formula, the changing rule of coefficient of friction mf between available fabric and driver roller bearing.
The above is only a preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
For member, without departing from the principle of the present invention, it can also make several improvements and retouch, these improvements and modifications are also answered
It is considered as protection scope of the present invention.
Claims (2)
- Deformation instability control method caused by 1. a kind of fabric surface uneven heating is even, characterized by the following steps:S1, capacitance sensor is placed in different fabric surfaces, to realize the acquisition of the data of the Temperature and Humidity module of fabric surface；S2, the pressure driver containing roller bearing control the frictional force of beam of a loom based on collected data of the Temperature and Humidity module driving roller bearing System.
- 2. deformation instability control method caused by a kind of fabric surface uneven heating as described in claim 1 is even, feature exist In:1) it when the moisture content of fabric is lower than textile processes parameter value, indicates that the heating degree of fabric surface is higher, then passes through pressure Power drive drives roller bearing to be detached from fabric surface, does not generate friction to fabric；2) it when the moisture content of fabric is higher than process design parameter value, indicates that the moisture content of fabric is higher, then passes through pressure-driven Device driving roller bearing will pressurize to fabric surface, increase the frictional force between fabric and beam of a loom, and by the adjustment of frictional force, avoid The uneven heating of fabric is even to cause fabric surface to deform.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811127691.6A CN109373705B (en) | 2018-09-20 | 2018-09-20 | Method for controlling deformation instability caused by uneven heating of fabric surface |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811127691.6A CN109373705B (en) | 2018-09-20 | 2018-09-20 | Method for controlling deformation instability caused by uneven heating of fabric surface |
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| Publication Number | Publication Date |
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| CN109373705A true CN109373705A (en) | 2019-02-22 |
| CN109373705B CN109373705B (en) | 2020-09-08 |
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| CN201811127691.6A Active CN109373705B (en) | 2018-09-20 | 2018-09-20 | Method for controlling deformation instability caused by uneven heating of fabric surface |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113702215A (en) * | 2021-09-09 | 2021-11-26 | 北京理工大学重庆创新中心 | Flexible fabric impact testing system and yarn strain energy calculating method |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103954111A (en) * | 2014-04-18 | 2014-07-30 | 吴江市科时达纺织有限公司 | Fabric dryer |
| CN104279848A (en) * | 2014-09-30 | 2015-01-14 | 张家港市华益纺织有限公司 | Gauze drying box |
| CN106757941A (en) * | 2017-01-04 | 2017-05-31 | 江苏海大纺织机械股份有限公司 | A kind of efficient baking oven of framing shaping machine Intelligent Measurement adjustable type |
| CN107345755A (en) * | 2016-05-04 | 2017-11-14 | 蒋满珍 | Weaving drying unit |
| CN207407623U (en) * | 2017-09-03 | 2018-05-25 | 盐城市峻珑纱线有限公司 | A kind of weaving heating unit |
-
2018
- 2018-09-20 CN CN201811127691.6A patent/CN109373705B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103954111A (en) * | 2014-04-18 | 2014-07-30 | 吴江市科时达纺织有限公司 | Fabric dryer |
| CN104279848A (en) * | 2014-09-30 | 2015-01-14 | 张家港市华益纺织有限公司 | Gauze drying box |
| CN107345755A (en) * | 2016-05-04 | 2017-11-14 | 蒋满珍 | Weaving drying unit |
| CN106757941A (en) * | 2017-01-04 | 2017-05-31 | 江苏海大纺织机械股份有限公司 | A kind of efficient baking oven of framing shaping machine Intelligent Measurement adjustable type |
| CN207407623U (en) * | 2017-09-03 | 2018-05-25 | 盐城市峻珑纱线有限公司 | A kind of weaving heating unit |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113702215A (en) * | 2021-09-09 | 2021-11-26 | 北京理工大学重庆创新中心 | Flexible fabric impact testing system and yarn strain energy calculating method |
| CN113702215B (en) * | 2021-09-09 | 2024-02-27 | 北京理工大学重庆创新中心 | Flexible fabric impact test system and yarn strain energy calculation method |
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| CN109373705B (en) | 2020-09-08 |
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