CN107740220A - A kind of 2.5D angles interlocking prefabricated component method for weaving of section decrescence - Google Patents
A kind of 2.5D angles interlocking prefabricated component method for weaving of section decrescence Download PDFInfo
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- CN107740220A CN107740220A CN201710967882.2A CN201710967882A CN107740220A CN 107740220 A CN107740220 A CN 107740220A CN 201710967882 A CN201710967882 A CN 201710967882A CN 107740220 A CN107740220 A CN 107740220A
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- yarn
- weaving
- prefabricated component
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- angle
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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 present invention relates to a kind of 2.5D angles of section decrescence to interlock prefabricated component method for weaving, based on this method interlocks weaving process by angle layer by layer, it is characterized in that in weaving process, on the basis of an end face of prefabricated component, according to the change of preform sectional dimension and the characteristics of motion of yarn, design along weaving direction planar subtract yarn point quantity and position, subtracting yarn point should be uniformly distributed；Yarn, yarn be mobile, yarn changes the changes of section that reed method realizes prefabricated component by subtracting, and completes the weaving of variable cross-section prefabricated component.This method is simple, and applicability is wide, the woven product good integrity of institute, can improve the mechanical property of composite.
Description
Technical field
The invention belongs to three dimensional fabric to weave field, and in particular to a kind of 2.5D angles interlocking prefabricated component weaving of section decrescence
Method.
Background technology
Traditional laminated composite uses veneer structure form, and interlayer performance weakness is its major defect, is compiled using three-dimensional
Knit reinforcing fiber in the three dimensional fabric prefabricated component of technology preparation to be interweaved in three dimensions, have good structure overall
Property, while the overall mechanical properties of composite are improved, improve the impact flexibility and damage tolerance of composite.
The enhancing structure of composite or the shape and structure and its quality of supporter preform determine compound substantially
The performance of material.But in engineer applied, it is variable cross-section product to have a kind of composite product, i.e., along this composite product
Length direction, its cross sectional dimensions is to change, or perhaps the product of unequal section.For the entirety of this kind of variable cross-section product
Preforming manufacture, traditional basic three-dimensional woven method or technique can not just be completed, it is impossible to meet high performance composite
Expect the requirement to preformed member.Current solution is on the basis of the corresponding uiform section preform, using biography
The machining process of system cuts into variable cross-section to obtain required variable cross-section product shape, such as prismatic cylinder
Pin, it is obvious that such processing can cause serious fibre damage, destroy the globality of preform, cause product
The decline of performance, and then make the hydraulic performance decline of enhancing structure and composite；On the other hand also increase process, improve it is pre- into
The manufacturing cost of type product.
The content of the invention
For the deficiency of existing knitting skill, technical problem that the present invention intends to solve is that to design a kind of section decrescence prefabricated
The three dimensional knitting method and its product technology of part, the weaving method can realize the abnormity with the change of cross section along its length
The three-dimension integrally braiding manufacture of composite preform, can save the process being processed further, and reduce production cost, and side
Method is simple, and applicability is wide.The product good integrity manufactured using weaving method of the present invention, mechanical properties are greatly improved, from
And the quality and performance of composite can be improved.
The technical scheme that the present invention solves the weaving method technical problem is：Design the three of a kind of section decrescence prefabricated component
Weaving method is tieed up, the three dimensional knitting method is based on the interlocking knitted technique in angle, it is characterised in that during braiding, with prefabricated
On the basis of one large end face of part, according to the change of preform sectional dimension and the characteristics of motion of braiding yarn, edge is designed
Weaving direction planar subtract yarn point quantity and position, subtracting yarn point should be uniformly distributed, and meet prefabricated component fiber volume fraction
Requirement, the changes of section of prefabricated component is realized by subtracting the method that yarn, yarn are mobile, yarn changes reed, completes section decrescence
The weaving of prefabricated component.
The present invention is on traditional interlocking knitted Process ba- sis in angle, by consistent with the change of preform sectional dimension
Or corresponding braiding yarn participates in the change of braiding quantity, to realize that the 3 D multi-directional of variable cross-section preform is integrally compiled
Knit, therefore the continuity of reinforcing fiber and the globality of product braiding structure in preform can be ensured, can avoid or reduce
Serious fibre damage caused by being machined after prefabricated component composite curing, so as to improving the quality of composite and performance；
Simultaneously because reducing manufacturing procedure, manufacturing cost can be reduced；On the other hand, compiled because the method for the invention has been ingehious design
The method that reed is changed in the movement of weaving yarn line, yarn, therefore, weaving method of the present invention have the characteristics of method is simple, wide adaptability, i.e.,
It had both been applicable to square braiding, manufactures the various variable cross-section preforms of square class, is applicable to tubular braiding again, manufactured
The various variable cross-section preforms of round class.
Brief description of the drawings
Fig. 1 is the weaving process schematic diagram of an embodiment of the present invention fabric；
Fig. 2 is the fabric construction schematic diagram of an embodiment of the present invention；
Fig. 3 is to subtract yarn at prefabricated component changes of section when preparation method of the present invention weaves to show total figure；
Fig. 4 is that preparation method of the present invention subtracts the shifting yarn schematic diagram after yarn when weaving at prefabricated component changes of section；
Fig. 5 changes reed schematic diagram to subtract the yarn after yarn during preparation method of the present invention braiding at prefabricated component changes of section
Fig. 6 is that weaving method of the present invention weaves a kind of three-dimensional trapezoidal fabric schematic diagram of embodiment.
Embodiment
The present invention is further discussed below with reference to embodiment and its accompanying drawing, but the present invention should not be limited by the examples：
Yarns paths described in weaving method of the present invention, refer to that lengthwise yarn hitch point is compiled during continuous weaving to exist
The changing rule of present position on machine palm fibre frame.
Warp, filling density described in weaving method of the present invention, refer to warp, fill yarn ends in unit length.
Braiding yarn described in weaving method of the present invention subtracts yarn, movement, changes the method that reed moves yarn, refers to subtracting yarn braiding
During, first the yarn of designed location point is subtracted, and the yarn subtracted near yarn point on correspondence position is moved to accordingly
On yarn hitch point, to ensure fabric construction even variation, some yarns are carried out changing reed shifting yarn operation afterwards, reach reduction ginseng
Add the method for braiding yarn radical.
2.5D angle-interlock fabrics described in method for weaving of the present invention are a kind of angle-interlock fabrics, including logical thickness skew angle connection
Lock fabric, P layer obliques angle-interlock fabric, the logical thickness oblique angle-interlock fabric with inlaid thread, the interlocking of the P layers skew angle with inlaid thread are knitted
Any one of thing, the orthogonal angle-interlock fabric of P layers, orthogonal angle-interlock fabric of P layers with inlaid thread etc. are (multiple referring to Yang Caiyun etc.
The structure design and New Weaving Technique [J] Donghua University journal of condensation material 3D Angular interlocking structure prefabricated components, 2005,31
(5)：53-58.).
Method for weaving of the present invention comprises the following steps：
1. select baseline cross-section.(join as woven reference plane 2 is started the maximum cross section for subtracting weaving yarns selection product 1
See Fig. 1).According to the size of the reference plane 2, the axial length of product 1, fabric yarn density design, it is determined that braiding yarn radical and
Length, including warp thread and laying-in yarn, warp thread 5 require to add as braiding yarn, laying-in yarn 6 according to product design, to improve system
The mechanical property of part a direction.
2. arrangement suspension yarn.Required yarn is hung in machine chassis 7 according to the shape of reference plane 2.According to system
Part cross sectional shape arranges yarn, and the reference plane 2 of product 1 is rectangle, and the form of warp thread 5 in rows and columns arranges.It is each to hang on yarn sheet 8
There are multiple extension yarn points 9 (being more than design requirement), each yarn sheet 8 of hanging hangs the row of yarn formation one, and multiple extension yarn sheets 8 are the same as position height
The yarn of degree forms row, the row thickness for determining product, and row determine the width of product.Warp thread is suspended on extension yarn through reed 4
Hung accordingly on yarn point on piece 8.
3. take up one's knitting.Drive warp thread 5 to pump when machine chassis 7 pumps, transported up and down reciprocatingly
Passage one by one is formed between warp thread 5 during dynamic, now through the passage and is left in them weft yarn 3, completion once interweaves,
Operated more than repeating, complete the intertexture of follow-up longitude and latitude yarn.
4. subtract yarn operation.It is so-called to subtract yarn operation, it is that some yarns for needing to subtract are not involved in follow-up braiding process.Work as volume
At the alternation of cross-section for knitting product 2, according to the change of the cross sectional dimensions, the arrangement of movement of the warp rule, yarn, it is determined that subtracting
The quantity of yarn and position, and be evenly distributed in axial length plane.It is not a real point to subtract yarn point I, and
It is the set of one group of yarn.One subtracts yarn point and comprises at least colleague, same column or the more warp thread 5 plus adjacent ranks, if any lining
Warp thread, including colleague, same column or the more warp thread 5 and laying-in yarn 6 plus adjacent ranks.
5. move yarn operation.So-called shifting yarn operation, it is change that the yarn subtracted hang yarn point 9 to subtracting at yarn point 11 to be,
To ensure that product structure is consistent.It is similar with subtracting the concept of yarn point 11 to move yarn point 12, simply effect is different.To moving yarn point 12
Warp thread carries out being moved across row for same position height or diverse location height, for constant, the yarn that ensures to subtract product thickness at yarn
The characteristics of motion is constant.To the yarn moved change the operation of reed 10 simultaneously, same column or multiple row warp thread is located at same dent
Between, ensure product through close constant.According to changes of section design repeat aforesaid operations, complete this time it is all subtract yarn point subtract yarn and
Move yarn operation.
6. start normal braiding.Repeat step 3,4,5, until braiding is completed.
Weaving method of the present invention is during described embodiment braiding, the face on the basis of the maximum cross-section of prefabricated component, meaning
Taste braiding process and unidirectionally successively decreased, this according to subtract yarn operation be easier realize and design.
The advantages of weaving method of the present invention, is ingenious and scientifically applies and subtract yarn and subtract thin operation, so as to make composite wood
Expecting the cross section change of special-shaped preform can be formed by reinforcing fiber integral weaving, thus reduce machinery after composite curing
Fibre damage caused by processing, it ensure that the continuity of reinforcing fiber in product and compile the globality for indulging structure；Simultaneously because subtract
Yarn point is uniformly distributed in the cross section of product, therefore is not in that penetrability and centrality subtract yarn defect, ensure that change is cut
The total quality of face preform.
The specific embodiment of the present invention is given below.
Embodiment 1：
The prismatoid product woven using the inventive method (referring to Fig. 6).Its big end section size is 100mm × 1.5mm
(width x thickness), trapezoidal a height of 100mm, warp count are 10/cm, and weft count is 8/cm, and filling yarn is carbon fiber
T300-3K, reed used are 10 teeth/cm.The warp thread radical according to needed for being calculated the requirement of product size and density is 500,
Warp length is at least greater than 100mm.
Warp thread 5 is passed through into reed 4 by through close requirement, is suspended on the extension yarn point 9 in machine chassis 7.In machine chassis 7
Lower move back and forth drives warp thread 5 to pump, and 6 or 4 passages are formed between warp thread during pumping 5,
Weft yarn 3 is now sequentially passed through into the passage and is left in them, after a weft yarn circulation is completed, promotes the urgent weft yarn 3 of reed 4,
Reach designed weft count.
Design drawing 2 show the fabric construction schematic diagram of the present embodiment use, is the orthogonal Angular interlocking structure of layer-layer, but this
Invention weaving method is not limited to a certain Angular interlocking structure, suitable for including logical thickness oblique angle-interlock fabric, P layer obliques
Angle-interlock fabric, the logical thickness oblique angle-interlock fabric with inlaid thread, the P layer obliques angle-interlock fabric with inlaid thread, P layers orthogonal angle connection
Locking any one of fabric, orthogonal angle-interlock fabric of P layers with inlaid thread etc., (referring to Yang Caiyun etc., composite is joined with 3D angles
Structure design and New Weaving Technique [J] the Donghua University journal of lock construction prefabricated component, 2005,31 (5)：53-58.).
Aforesaid operations are repeated, until reaching at product changes of section.The yarn for subtracting yarn point I is subtracted as shown in Figure 3
Operation, move yarn operation as shown in figure 4, simultaneously to institute with position height extension yarn point to adjacent column to moving yarn point II yarns afterwards
Mobile yarn change the operation of reed 10, as shown in figure 5, making same column or multiple row warp thread between same dent, ensures product
Through close constant.Repetition aforesaid operations are designed according to changes of section, this time all yarns that subtract for subtracting yarn point is completed and is operated with yarn is moved.Subtract
Yarn point position is as shown in table 1.
The present embodiment product of table 1 subtracts yarn point position
According to it is designed subtract yarn point position carry out it is corresponding subtract yarn, move yarn, picking operation, until completing all to subtract yarn
Put and reach product design length, that is, obtain designed prismatoid product.
Claims (5)
1. a kind of three dimensional knitting method of variable cross-section prefabricated component, the three dimensional knitting method interlocks weaving process as base using layer-layer angle
Plinth, it is characterised in that in weaving process, on the basis of an end face of prefabricated component, according to the change of preform sectional dimension
Change and the characteristics of motion of yarn, design along weaving direction planar subtract yarn point quantity and position, subtracting yarn point should uniformly minute
Cloth；Yarn, yarn be mobile, yarn changes the changes of section that reed method realizes prefabricated component by subtracting, and completes variable cross-section prefabricated component
Weaving.
2. the three dimensional knitting method of variable cross-section prefabricated component according to claim 1 is not limited to layer-layer angle interlocking weaving
Technique, it is equally applicable to logical thickness oblique angle-interlock fabric, P layer obliques angle-interlock fabric, the logical thickness skew angle connection with inlaid thread
Lock fabric, the P layer obliques angle-interlock fabric with inlaid thread, the orthogonal angle-interlock fabric of P layers, the P layers orthogonal angle interlocking weaving with inlaid thread
Technique.
3. according to claim 1, it is characterised in that subtract yarn point and do not repeat to be distributed in same warp yarn position, but be uniformly distributed
's.
4. according to claim 1, it is characterised in that the movement of yarn is positioned at some warps subtracted in yarn point consecutive warp row
The movement of yarn.
5. according to claim 1, it is characterised in that it is to cut part warp thread near yarn point subtracting to subtract yarn.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710967882.2A CN107740220A (en) | 2017-10-17 | 2017-10-17 | A kind of 2.5D angles interlocking prefabricated component method for weaving of section decrescence |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710967882.2A CN107740220A (en) | 2017-10-17 | 2017-10-17 | A kind of 2.5D angles interlocking prefabricated component method for weaving of section decrescence |
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| Publication Number | Publication Date |
|---|---|
| CN107740220A true CN107740220A (en) | 2018-02-27 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710967882.2A Pending CN107740220A (en) | 2017-10-17 | 2017-10-17 | A kind of 2.5D angles interlocking prefabricated component method for weaving of section decrescence |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113818121A (en) * | 2021-10-19 | 2021-12-21 | 江南大学 | Aviation turbine guide vane prefabricated body and preparation method thereof |
-
2017
- 2017-10-17 CN CN201710967882.2A patent/CN107740220A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113818121A (en) * | 2021-10-19 | 2021-12-21 | 江南大学 | Aviation turbine guide vane prefabricated body and preparation method thereof |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20180227 |
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| WD01 | Invention patent application deemed withdrawn after publication |