CN102926128A - Three-dimensional weaving method of curve-type variable-cross-section step board - Google Patents
Three-dimensional weaving method of curve-type variable-cross-section step board Download PDFInfo
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- CN102926128A CN102926128A CN2012102702777A CN201210270277A CN102926128A CN 102926128 A CN102926128 A CN 102926128A CN 2012102702777 A CN2012102702777 A CN 2012102702777A CN 201210270277 A CN201210270277 A CN 201210270277A CN 102926128 A CN102926128 A CN 102926128A
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Abstract
The invention relates to a three-dimensional weaving method of a curve-type variable-cross-section step board. According to the invention, a four-step-method three-dimensional special-shaped overall weaving technology is adopted as a basis; and yarn-carrier and spindle movement regularities are controlled, such that a prefabricated piece fits a preset spatial curve when shaped. Therefore, a curve-type step board is formed. The method is characterized in that at least one time of yarn-moving operation is carried out, such that the curve-type variable-cross-section step board is obtained. With the method provided by the invention, one-step net size overall shaping of the curve-type variable-cross-section step board is realized, such that a problem of delamination of a current layer paving method and a problem of fiber damage of a suture method are solved. With the method, structure integrity and mechanical property stability of the prefabricated piece are effectively ensured, processing processes are reduced, formation speed is improved, and production cost is reduced.
Description
Technical field
The present invention relates to a kind of three dimensional knitting method of curvilinear style variable cross-section stepped plate, belong to textile science and technical field.
Background technology
The 3 D weaving technology set various features such as design flexibility, shape diversity, structural integrity and integrated quality superiority, can dead size integral weaving special-shaped component, greatly reduce the material damage that following process is introduced, guarantee the stable and reliable of mechanical property, can satisfy the various fields such as Aero-Space, defence and military to the whole requirement of composite complicated shape and combination property, have extremely wide application prospect.Three-dimension integrally braiding technology such as I shape, hollow, L-type, T-shaped isoline type special-shaped component is comparatively ripe at present; But in actual applications, a large amount of composites are curvilinear style variable cross-section stepped plates, and such as aircraft wing cover plate, existing 3 D weaving technology also can't realize the global formation of this class A of geometric unitA.
At present, the method for preparing this class body fabric mainly contains: 1, laying cutting-out method, namely adopt flat fabric, and prepare the curvilinear style special-shaped component by laying and cutting operation; Its shortcoming is: size accuracy and uniformity during cutting between each layer fabric are wayward, and the layer structure that laying causes makes the interlayer globality of fabric relatively poor, very easily produces delamination failure, and impact flexibility and the damage tolerance of prepared composite are lower; 2, sewing, namely on the basis of three-dimension integrally braiding technique, abnormal shape is partly coupled together the formation prefabricated component with suture according to certain sewing process parameter, the method has overcome the conventional composite materials laminate structures owing to do not have fibre-reinforced shortcoming between each laying, but in sewing process, easily cause fibre damage, reduce composite material strength.Therefore, in order to prepare the curvilinear style variable cross-section stepped plate that has structural integrity and mechanical stability concurrently, need research novel three-dimensional knitting skill badly.
Summary of the invention
The object of the invention is to the deficiency for existing variable cross-section 3 D weaving technology, a kind of three dimensional knitting method of curvilinear style variable cross-section stepped plate is provided.The method has solved the lamination problem of present employing laying method and has adopted the fibre damage problem of sewing, prepared curvilinear style variable cross-section stepped plate, need not further splicing, spacial framework with height integration, thereby the integrality of product structure and the stability of mechanical property have effectively been guaranteed, reduce simultaneously operation, reduce cost.
In order to achieve the above object, the invention provides a kind of three dimensional knitting method of curvilinear style variable cross-section stepped plate, take the three-dimensional special-shaped integral weaving technology of four step rule square as the basis, yarn device and the spindle characteristics of motion are taken in control, so that the predetermined space curve of fitting during the prefabricated component moulding, forming curves formula variable cross-section stepped plate, it is characterized in that, in the braiding process, the yarn that moves that carries out at least one times operates, to obtain curvilinear style variable cross-section stepped plate.
Concrete operations are: according to the size of predetermined curve formula variable cross-section stepped plate, hang the capable and n row yarn of m at the 3 D weaving machine, according to four step rule square 3 D weaving craft woven to predetermined length; With the move right distance of a spindle of all knitting yarns, weave certain period according to desired curve shape; The move right distance of a spindle of all knitting yarns, weave certain period according to desired curve shape again; By that analogy, until knit out required curvilinear style step shape; Stop at last the spindle that moves right, to predetermined length, finish the braiding of curvilinear style variable cross-section stepped plate according to four step rule square 3 D weaving craft woven.
The three dimensional knitting method of a kind of curvilinear style variable cross-section stepped plate of the present invention, specific as follows:
The first step, arrange and hang knitting yarn: according to the shape of cross section of curvilinear style variable cross-section stepped plate, spread pattern and the row, column number of spindle uploaded on design 3 D weaving machine chassis, and knitting yarn is suspended from year spindle;
Second step, take up one's knitting: adopt four step rule square 3 D weaving technique, the 1st step made the knitting yarn of adjacent lines follow spindle distance of direction alternating movement, the 2nd step made the knitting yarn of adjacent column along spindle distance of column direction alternating movement, the direction of motion of yarn is then opposite with the 1st step, the 2nd step respectively in the 3rd step, the 4th step, through above-mentioned four step motions, finishes a braiding and circulates, repeat above-mentioned four movement step, until predetermined length;
In the 3rd step, move yarn operation: with the move right distance of a spindle of all knitting yarns, weave certain period according to desired curve shape; The move right distance of a spindle of all knitting yarns, weave certain period according to desired curve shape again; By that analogy, until knit out required curve step shape;
In the 4th step, continue braiding: proceed follow-up braiding according to the described braid method of second step, until curvilinear style variable cross-section stepped plate is finished in braiding.
Compared with prior art, advantage of the present invention is: the disposable dead size global formation that can realize curvilinear style variable cross-section stepped plate, solved the fibre damage problem of lamination problem and the employing sewing of present employing laying method, structural integrity and the stable mechanical property of prefabricated component have effectively been guaranteed, reduced simultaneously manufacturing procedure, improve formation speed, reduced production cost.
Description of drawings
Fig. 1 is the initial arrangement schematic diagram that spindle is uploaded on 3 D weaving machine chassis; Among Fig. 1,1 for carrying spindle;
Fig. 2 is for after row move yarn to the right, and the arrangement schematic diagram of spindle is uploaded on 3 D weaving machine chassis; Among Fig. 2,1 for carrying spindle;
Fig. 3 is the schematic perspective view of curvilinear style variable cross-section stepped plate.
The specific embodiment
As shown in Figure 1, be the initial arrangement schematic diagram of knitting yarn on 3 D weaving machine chassis, knitting yarn is suspended on and carries on the spindle 1; As shown in Figure 2, after row moved yarn to the right, the arrangement schematic diagram of spindle was uploaded on 3 D weaving machine chassis,
The below sets forth the present invention take concrete curvilinear style variable cross-section stepped plate as example.
Embodiment 1
As shown in Figure 3, be a kind of schematic perspective view of curvilinear style variable cross-section stepped plate, adopt the T700-12k carbon fiber knit to form.The first step, according to the shape of cross section of curvilinear style variable cross-section stepped plate, spread pattern and the row, column number of spindle uploaded on design 3 D weaving machine chassis, and the arrangement mode of 360 knitting yarns according to 60 row, 6 row is suspended from year spindle; Second step, adopt four step rule square 3 D weaving technique, the 1st step made the knitting yarn of adjacent lines follow spindle distance of direction alternating movement, the 2nd step made the knitting yarn of adjacent column along spindle distance of column direction alternating movement, the direction of motion of yarn is then opposite with the 1st step, the 2nd step respectively in the 3rd step, the 4th step, through above-mentioned four step motions, finishes a braiding and circulates, repeat above-mentioned four movement step, be woven into predetermined length; In the 3rd step, with the move right distance of a spindle of all knitting yarns, weave certain period according to desired curve shape; The move right distance of a spindle of all knitting yarns, weave certain period according to desired curve shape again; By that analogy, until knit out required curve step shape; The 4th step, proceed follow-up braiding according to the described braid method of second step, until braiding is finished, obtain width and be about 5cm, thickness is about the curvilinear style variable cross-section stepped plate of 5mm.
Embodiment 2
As shown in Figure 3, be a kind of schematic perspective view of curvilinear style variable cross-section stepped plate, adopt the T700-12k carbon fiber knit to form.The first step, according to the shape of cross section of curvilinear style variable cross-section stepped plate, spread pattern and the row, column number of spindle uploaded on design 3 D weaving machine chassis, and the arrangement mode of 2880 knitting yarns according to 120 row, 24 row is suspended from year spindle; Second step, adopt four step rule square 3 D weaving technique, the 1st step made the knitting yarn of adjacent lines follow spindle distance of direction alternating movement, the 2nd step made the knitting yarn of adjacent column along spindle distance of column direction alternating movement, the direction of motion of yarn is then opposite with the 1st step, the 2nd step respectively in the 3rd step, the 4th step, through above-mentioned four step motions, finishes a braiding and circulates, repeat above-mentioned four movement step, be woven into predetermined length; In the 3rd step, with the move right distance of a spindle of all knitting yarns, weave certain period according to desired curve shape; The move right distance of a spindle of all knitting yarns, weave certain period according to desired curve shape again; By that analogy, until knit out required curve step shape; The 4th step, proceed follow-up braiding according to the described braid method of second step, until braiding is finished, obtain width and be about 10cm, thickness is about the curvilinear style variable cross-section stepped plate of 2cm.
Claims (2)
1. the three dimensional knitting method of a curvilinear style variable cross-section stepped plate, take the three-dimensional special-shaped integral weaving technology of four step rule square as the basis, yarn device and the spindle characteristics of motion are taken in control, the predetermined space curve so that fit during the prefabricated component moulding, forming curves formula stepped plate is characterized in that, in the braiding process, the yarn that moves that carries out at least one times operates, to obtain curvilinear style variable cross-section stepped plate; Concrete operations are: according to the size of predetermined curve formula variable cross-section stepped plate, hang the capable and n row yarn of m at the 3 D weaving machine, according to four step rule square 3 D weaving craft woven to predetermined length; With the move right distance of a spindle of all knitting yarns, weave certain period according to desired curve shape; The move right distance of a spindle of all knitting yarns, weave certain period according to desired curve shape again; By that analogy, until knit out required curvilinear style step shape; Stop at last the spindle that moves right, to predetermined length, finish the braiding of curvilinear style variable cross-section stepped plate according to four step rule square 3 D weaving craft woven.
2. the three dimensional knitting method of curvilinear style variable cross-section stepped plate as claimed in claim 1 is characterized in that, described concrete operations are:
The first step, according to the shape of cross section of curvilinear style variable cross-section stepped plate, spread pattern and the row, column number of spindle uploaded on design 3 D weaving machine chassis, and knitting yarn is suspended from year spindle;
Second step, adopt four step rule square 3 D weaving technique, the 1st step made the knitting yarn of adjacent lines follow spindle distance of direction alternating movement, the 2nd step made the knitting yarn of adjacent column along spindle distance of column direction alternating movement, the direction of motion of yarn is then opposite with the 1st step, the 2nd step respectively in the 3rd step, the 4th step, through above-mentioned four step motions, finishes a braiding and circulates, repeat above-mentioned four movement step, until predetermined length;
In the 3rd step, with the move right distance of a spindle of all knitting yarns, weave certain period according to desired curve shape; The move right distance of a spindle of all knitting yarns, weave certain period according to desired curve shape again; By that analogy, until knit out required curve step shape;
In the 4th step, proceed follow-up braiding according to the described braid method of second step, until curvilinear style variable cross-section stepped plate is finished in braiding.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108998888A (en) * | 2018-08-08 | 2018-12-14 | 天津工大航泰复合材料有限公司 | A kind of three dimensional knitting method and product of row-column transform variable cross-section preform |
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| US4228207A (en) * | 1977-09-08 | 1980-10-14 | Societe Civile D'etudes Et De Recherches Pour L'obtention De Fibres Minerales (S.E.R.O.F.I.M.) | Three-dimensional shaped articles |
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2012
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| US4228207A (en) * | 1977-09-08 | 1980-10-14 | Societe Civile D'etudes Et De Recherches Pour L'obtention De Fibres Minerales (S.E.R.O.F.I.M.) | Three-dimensional shaped articles |
| US5348056A (en) * | 1991-04-23 | 1994-09-20 | Three-D Composites Research Corporation | Three-dimensional woven fabric with varied thread orientations |
| CN1614114A (en) * | 2004-11-30 | 2005-05-11 | 中材科技股份有限公司 | Method for knitting 3D multi-directional braided fabric in size reduced profile of composite material |
| CN102011269A (en) * | 2010-12-20 | 2011-04-13 | 东华大学 | Net shape preparation method of variable cross-section three-dimensional braiding preprofiling piece |
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| 刘兆麟: "变截面三维编织预型件的净形制备工艺与细观结构", 《河北科技大学学报》 * |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108998888A (en) * | 2018-08-08 | 2018-12-14 | 天津工大航泰复合材料有限公司 | A kind of three dimensional knitting method and product of row-column transform variable cross-section preform |
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