CN106048858A - Overall weaving method for 2.5D abnormally-shaped fabric - Google Patents
Overall weaving method for 2.5D abnormally-shaped fabric Download PDFInfo
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- CN106048858A CN106048858A CN201610641941.2A CN201610641941A CN106048858A CN 106048858 A CN106048858 A CN 106048858A CN 201610641941 A CN201610641941 A CN 201610641941A CN 106048858 A CN106048858 A CN 106048858A
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- yarn
- weaving
- special
- precast body
- thickness
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- D—TEXTILES; PAPER
- D03—WEAVING
- D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
- D03D25/00—Woven fabrics not otherwise provided for
- D03D25/005—Three-dimensional woven fabrics
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- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Woven Fabrics (AREA)
Abstract
The invention relates to a textile technology, in particular to a weaving method for a 2.5D fabric. According to the overall weaving method for the 2.5D abnormally-shaped fabric, different amounts of yarn are added in different sections and different areas, a 2.5D abnormally-shaped fabric weaving area is divided into multiple parts, different layers and columns of warp yarns are adopted in different weaving spaces, the warp yarns in the different areas are combined into the appearance of the needed 2.5D abnormally-shaped fabric under manual control, and meanwhile, needed special fiber beams are selected as weft yarns for overall weaving and molding. The advantages of the special fibers and advantages of the 2.5D weaving structure are obtained, and meanwhile the problem that defects are caused by a past weaving way, namely fabric splicing to the interior and the exterior of the weaving structure is avoided.
Description
Technical field
The present invention relates to textile technology, the weaving method of a kind of 2.5D fabric.
Background technology
The 2.5D fabric utilizing special fibre such as carbon fiber, quartz fibre, aramid fiber etc. to weave is all kinds of composites
The fiber reinforcement precast body of engine body, wind electricity blade, launching tube etc..Have that strength modulus is high, Effective Shear Stiffness is strong, hot
Deform little, the premium properties such as density is low, resistance to erosion and antifriction, be widely used in Large Radar cover, unmanned aerial vehicle fuselage and solid
The parts at a little position, end of the high-end facilities such as rocket engine body., performance requirement difference different according to application scenario, application section
Position is different, and a lot of fiber reinforcement precast bodies also need to have different profiles while not affecting its premium properties, is referred to as
2.5D contoured fabrics.
In the actual production in past, a kind of mode is to spell after use carries out knitting forming respectively with the composite of performance
It is connected into the profiled piece compound use of requirement；Another way is to use 3 D weaving method one-step shaping.But, a number of pre-
Body processed splicing uses the integrity destroying yarn and knitted body, affects the integrally-built seriality of precast body, reduces prefabricated
Body intensity, can make precast body produce inside and outside defect；And 3 D weaving molding to there is knitted body volume content too low, precast body
Interlaminar shear strength cannot meet the problem using requirement.
Summary of the invention
In order to solve the deficiency that prior art exists, the invention provides one and utilize special fibre continuous long strand overall
The integral weaving forming method of braiding 2.5D contoured fabrics.
The integral weaving method of a kind of 2.5D contoured fabrics in the present invention, uses segment-and-region-based inequality to add yarn side
Method, is divided into some parts by 2.5D contoured fabrics woven extent during braiding, use in difference braiding space the different number of plies,
The warp yarn of columns, makes each region warp yarn be combined into required 2.5D contoured fabrics outward appearance under manual control, simultaneously
Special fibre yarn Shu Zuowei weft yams needed for selection carries out integral weaving molding, and weaving method comprises the steps:
The first step: the special fibre needed for employing cuts, to obtain enough fibers long yarn bundle；
Second step: calculate integral weaving thing difference braiding section according to yarn shrinkage, the line density of the special fibre used
Thickness in monolayer, then the thickness requirement by each section of 2.5D abnormal shape precast body, draw the actual layer number in actual each warp thread region, by advance
External surface size processed, draws each region warp thread columns；
3rd step: according to each region actual layer number drawn, columns value, each region warp thread is arranged；
Shrinkage computing formula: μ=(L0-L1)/L0；
L0 is that the front length of yarn braiding (uses same specification yarn, regular length, the fixing twist, is the straight steel ruler of 0.1cm by precision
Measurement draws)；
L1 is that physical length after yarn weaves (uses same specification yarn, regular length, the fixing twist, is the steel of 0.1cm by precision
Ruler measurement draws)；
Line density: general carbon fiber is 1.76 g/cm^3, quartz fibre 2.2 g/cm^3, by actually used yarn specification and
Ingredient inspection Report Parameters is as the criterion；
Thickness in monolayer: δ=φ V/S；
φ V is that this section of fabric volume content (uses same specification yarn, regular length, width, the fixing twist, fixing line density meter
Draw)；
S is that this section of fabric side density (uses same specification yarn, regular length, width, the fixing twist, fixing line density to calculate
Go out)；
Columns computing formula: X=D/ δ * a*y；
D is this part thickness of precast body, and δ is precast body thickness in monolayer, and a is this position end count of precast body, and y is this position of precast body
Width；
X1=c/ δ 1*a1*d, X2=f/ δ 2*A2*d. (D1=c, D2=f)；
4th step: use face degree tangent elastic modulus and Effective Shear Stiffness formula calculate this 2.5D contoured fabrics elastic modelling quantity and
Interlaminar shear strength, requires to contrast with technology, and whether this product of Budget Service meets requirement；
Surface layer elastic modelling quantity formula:
E1=EF*Vf+Em*Vm E2=Ef*Em/(Vm*Ef+Vf*Em) G=GM*GF/(Vf*Gm+Vm*Gf)；
E1 is the elastic modelling quantity in warp fiber direction；E2 is the elastic modelling quantity of thickness direction fiber；Ef is the elasticity of special fibre
Modulus；Em is the elastic modelling quantity of special-shaped textile body；Vf, Vm are the fiber volume fraction of special-shaped textile body；G is shearing elasticity mould
Amount；GM, GF are the coefficient of rigidity of fibrage body；
Effective Shear Stiffness: AG=d (c+f) * G/(c+f)=dG
AG=dG, so 2.5D abnormal shape precast body each position equivalence shear strength value is identical, without cutting sample respectively during sampling test
This；
5th step: after the 4th step is calculated, use ready special fibre long yarn bundle to do weft yams raw material, utilize 2.5D different
Type braider carries out integral weaving molding.
Beneficial effects of the present invention: the globality of the yarn bundle i.e. weaving textile of integral weaving mouldability of 2.5D abnormal shape most critical
It is guaranteed, it is ensured that fabric is integrally-built stable, inherit that special fibre precast body strength modulus is high, thermal deformation is little,
The premium properties such as density is low, resistance to erosion and antifriction, the most also meet the particular/special requirement of contoured fabrics outer surface shape.Due to
Woven extent each to 2.5D contoured fabrics selects identical type special fibre continuous weaving, is improved every property of one integral piece fabric
Can stability, while obtain special fibre advantage and 2.5D braiding structure strong point, it is to avoid old weaving manner is i.e. spelled
Connect the defect that braiding structure inside and outside is caused by fabric.Cause this precast body volume content low with 3 D weaving mode, intensity mould
Measure low defect different.While the weaving manner of the present invention ensure that the property indices of precast body, improve product
Yield rate also further increases the structural behaviour of product on the original basis.
Accompanying drawing explanation
Fig. 1 is abnormity precursor structure schematic diagram.
Fig. 2 is warp thread distribution schematic diagram in precast body.
Labelling in figure: 1, radially warp thread.
Detailed description of the invention
Below in conjunction with the accompanying drawings the present invention is described in further detail, but this should be interpreted as the above-mentioned theme of the present invention
Scope be only limitted to above-described embodiment.
According to the warp thread arragement direction shown in Fig. 1-2, precast body the most successively adds weft yams, until becoming
Type.
Specifically include following steps:
The first step: the special fibre needed for employing cuts, to obtain enough fibers long yarn bundle；
Second step: calculate integral weaving thing difference braiding section according to yarn shrinkage, the line density of the special fibre used
Thickness in monolayer, then the thickness requirement by each section of 2.5D abnormal shape precast body, draw the actual layer number in actual each warp thread region, by advance
External surface size processed, draws each region warp thread columns；
3rd step: according to each region actual layer number drawn, columns value, each region warp thread is arranged；
Shrinkage computing formula: μ=(L0-L1)/L0；
L0 is that the front length of yarn braiding (uses same specification yarn, regular length, the fixing twist, is the straight steel ruler of 0.1cm by precision
Measurement draws)；
L1 is that physical length after yarn weaves (uses same specification yarn, regular length, the fixing twist, is the steel of 0.1cm by precision
Ruler measurement draws)；
Line density: general carbon fiber is 1.76 g/cm^3, quartz fibre 2.2 g/cm^3, by actually used yarn specification and
Ingredient inspection Report Parameters is as the criterion；
Thickness in monolayer: δ=φ V/S；
φ V is that this section of fabric volume content (uses same specification yarn, regular length, width, the fixing twist, fixing line density meter
Draw)；
S is that this section of fabric side density (uses same specification yarn, regular length, width, the fixing twist, fixing line density to calculate
Go out)；
Columns computing formula: X=D/ δ * a*y；
D is this part thickness of precast body, and δ is precast body thickness in monolayer, and a is this position end count of precast body, and y is this position of precast body
Width；
X1=c/ δ 1*a1*d, X2=f/ δ 2*A2*d. (D1=c, D2=f)；
4th step: use face degree tangent elastic modulus and Effective Shear Stiffness formula calculate this 2.5D contoured fabrics elastic modelling quantity and
Interlaminar shear strength, requires to contrast with technology, and whether this product of Budget Service meets requirement；
Surface layer elastic modelling quantity formula:
E1=EF*Vf+Em*Vm E2=Ef*Em/(Vm*Ef+Vf*Em) G=GM*GF/(Vf*Gm+Vm*Gf)
E1 is the elastic modelling quantity in warp fiber direction；E2 is the elastic modelling quantity of thickness direction fiber；Ef is the elasticity of special fibre
Modulus；Em is the elastic modelling quantity of special-shaped textile body；Vf, Vm are the fiber volume fraction of special-shaped textile body；G is shearing elasticity mould
Amount；GM, GF are the coefficient of rigidity of fibrage body；
Effective Shear Stiffness: AG=d (c+f) * G/(c+f)=dG；
AG=dG, so 2.5D abnormal shape precast body each position equivalence shear strength value is identical, without cutting sample respectively during sampling test
This；
5th step: after the 4th step is calculated, use ready special fibre long yarn bundle to do weft yams raw material, utilize 2.5D different
Type braider carries out integral weaving molding.
Compared with prior art, there is advantages that
In method of the present invention, the globality of the yarn bundle i.e. weaving textile of integral weaving mouldability of 2.5D abnormal shape most critical
It is guaranteed, it is ensured that fabric is integrally-built stable, inherit that special fibre precast body strength modulus is high, thermal deformation is little,
The premium properties such as density is low, resistance to erosion and antifriction, the most also meet the particular/special requirement of contoured fabrics outer surface shape.Due to
Woven extent each to 2.5D contoured fabrics selects identical type special fibre continuous weaving, is improved every property of one integral piece fabric
Can stability, while obtain special fibre advantage and 2.5D braiding structure strong point, it is to avoid old weaving manner is i.e. spelled
Connect the defect that braiding structure inside and outside is caused by fabric.Cause this precast body volume content low with 3 D weaving mode, intensity mould
Measure low defect different.While the weaving manner of the present invention ensure that the property indices of precast body, improve product
Yield rate also further increases the structural behaviour of product on the original basis.
Equipment needed thereby: 2.5D special-shaped textile machine, required raw and auxiliary material: high-strength quartz fibre, the special Buddhist nun of 2.5D special-shaped textile
Dragon line, pink colour elastic etc..
Weaving: use the shallow friendship of 2.5D curved/direct connection braiding structure.
Braiding process: use 1 2.5D special-shaped textile machine, hangs over front-end operations platform by high-strength for equal diameter quartz fibre yarn bundle
On creel, the other end is connected with nylon wire one end, and nylon wire is connected with pink colour elastic, after elastic hangs over through monofilament pinhole
On end operating board screw rod, it is ensured that hybrid junction yarn bundle horizontally suspends that (warp yarns arrangement rule is by special-shaped preform shape and outer surface
Size determines, as a example by this sentences icon 1 shape).Moved the drive related yarn of elastic by the rule of monofilament and form the shallow friendship of 2.5D
Curved/direct connection structure, monofilament is often mobile once forms opening between yarn, opening is delivered to front end by braiding personnel, through ring
To (normal direction) yarn, form flower joint, be then fixed, until it reaches the thickness requirement of first area, then carry out second area
Weft yarn (hoop) introduces, until all numbers of plies all introduce normal direction (hoop) yarn；Then carry out monofilament next time to move, enter by this
Row circulation operation, until it reaches require length, thickness, concrete radical need by shrinkage computing formula: μ=(L0-L1)/L0 with
And thickness in monolayer computing formula: δ=φ V/S learns；Concrete yarn columns is from columns computing formula: precast body with X=D/ δ * a*y
Exterior surface dimension requires to draw.
Project check index:
1, special-shaped precast body fabric integral weaving section thickness ensures between δ+0.5 ~ δ+1.0mm (δ=2～3mm)；
2, special-shaped precast body layering knitting zone handing-over layer thickness ensures between δ+0.5 ~ δ+1.0mm (δ=3～4mm)；
3, special-shaped precast body surface layer elastic modelling quantity ensures to be not less than G(G=GM*GF/ (Vf*Gm+Vm*Gf))；
4, special-shaped precast body Effective Shear Stiffness ensures to be not less than AG(AG=d (c+f) * G/(c+f)).
Claims (1)
1. an integral weaving method for 2.5D contoured fabrics, uses segment-and-region-based inequality to add yarn method, in braiding process
Middle 2.5D contoured fabrics woven extent is divided into some parts, uses the different number of plies, the warp-wise yarn of columns in difference braiding space
Line, makes each region warp yarn be combined into required 2.5D contoured fabrics outward appearance, the spy needed for simultaneously selecting under manual control
Planting silvalin Shu Zuowei weft yams and carry out integral weaving molding, weaving method comprises the steps:
The first step: the special fibre needed for employing cuts, to obtain enough fibers long yarn bundle；
Second step: calculate integral weaving thing difference braiding section according to yarn shrinkage, the line density of the special fibre used
Thickness in monolayer, then the thickness requirement by each section of 2.5D abnormal shape precast body, draw the actual layer number in actual each warp thread region, by advance
External surface size processed, draws each region warp thread columns；
3rd step: according to each region actual layer number drawn, columns value, each region warp thread is arranged；
Shrinkage computing formula: μ=(L0-L1)/L0；
L0 is that the front length of yarn braiding (uses same specification yarn, regular length, the fixing twist, is the straight steel ruler of 0.1cm by precision
Measurement draws)；
L1 is that physical length after yarn weaves (uses same specification yarn, regular length, the fixing twist, is the steel of 0.1cm by precision
Ruler measurement draws)；
Line density: general carbon fiber is 1.76 g/cm^3, quartz fibre 2.2 g/cm^3, by actually used yarn specification and
Ingredient inspection Report Parameters is as the criterion；
Thickness in monolayer: δ=φ V/S；
φ V is that this section of fabric volume content (uses same specification yarn, regular length, width, the fixing twist, fixing line density meter
Draw)；
S is that this section of fabric side density (uses same specification yarn, regular length, width, the fixing twist, fixing line density to calculate
Go out)；
Columns computing formula: X=D/ δ * a*y；
D is this part thickness of precast body, and δ is precast body thickness in monolayer, and a is this position end count of precast body, and y is this position of precast body
Width；
X1=c/ δ 1*a1*d, X2=f/ δ 2*A2*d. (D1=c, D2=f)；
4th step: use face degree tangent elastic modulus and Effective Shear Stiffness formula calculate this 2.5D contoured fabrics elastic modelling quantity and
Interlaminar shear strength, requires to contrast with technology, and whether this product of Budget Service meets requirement；
Surface layer elastic modelling quantity formula:
E1=EF*Vf+Em*Vm E2=Ef*Em/(Vm*Ef+Vf*Em) G=GM*GF/(Vf*Gm+Vm*Gf)；
E1 is the elastic modelling quantity in warp fiber direction；E2 is the elastic modelling quantity of thickness direction fiber；Ef is the elasticity of special fibre
Modulus；Em is the elastic modelling quantity of special-shaped textile body；Vf, Vm are the fiber volume fraction of special-shaped textile body；G is shearing elasticity mould
Amount；GM, GF are the coefficient of rigidity of fibrage body；
Effective Shear Stiffness: AG=d (c+f) * G/(c+f)=dG
AG=dG, so 2.5D abnormal shape precast body each position equivalence shear strength value is identical, without cutting sample respectively during sampling test
This；
5th step: after the 4th step is calculated, use ready special fibre long yarn bundle to do weft yams raw material, utilize 2.5D different
Type braider carries out integral weaving molding.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610641941.2A CN106048858A (en) | 2016-08-08 | 2016-08-08 | Overall weaving method for 2.5D abnormally-shaped fabric |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610641941.2A CN106048858A (en) | 2016-08-08 | 2016-08-08 | Overall weaving method for 2.5D abnormally-shaped fabric |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106048858A true CN106048858A (en) | 2016-10-26 |
Family
ID=57481937
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610641941.2A Pending CN106048858A (en) | 2016-08-08 | 2016-08-08 | Overall weaving method for 2.5D abnormally-shaped fabric |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108360122A (en) * | 2018-01-23 | 2018-08-03 | 常州纺织服装职业技术学院 | A kind of three-dimensional box fabric one-pass molding weaving method |
| CN108474148A (en) * | 2016-01-04 | 2018-08-31 | 阿尔巴尼复合物工程股份有限公司 | The prefabricated component of gap fillers with one |
| CN111409290A (en) * | 2020-03-31 | 2020-07-14 | 江南大学 | Flexible woven soft interlayer for pulse engine and manufacturing method |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108474148A (en) * | 2016-01-04 | 2018-08-31 | 阿尔巴尼复合物工程股份有限公司 | The prefabricated component of gap fillers with one |
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| CN111409290A (en) * | 2020-03-31 | 2020-07-14 | 江南大学 | Flexible woven soft interlayer for pulse engine and manufacturing method |
| CN111409290B (en) * | 2020-03-31 | 2021-05-28 | 江南大学 | Flexible woven soft interlayer for pulse engine and manufacturing method |
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Application publication date: 20161026 |