CN102926128B - 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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- CN102926128B CN102926128B CN201210270277.7A CN201210270277A CN102926128B CN 102926128 B CN102926128 B CN 102926128B CN 201210270277 A CN201210270277 A CN 201210270277A CN 102926128 B CN102926128 B CN 102926128B
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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 three dimensional knitting method that the present invention relates to a kind of curvilinear style variable cross-section stepped plate, belongs to textile science and technical field.
Background technology
3 D weaving technology set the 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 meet the overall requirement of the various fields such as Aero-Space, defence and military to composite complicated shape and combination property, there is extremely wide application prospect.Comparatively ripe such as the three-dimension integrally braiding technology of I shape, hollow, L-type, T-shaped isoline type special-shaped component at present; But in actual applications, a large amount of composites are curvilinear style variable cross-section stepped plates, and as aircraft wing cover plate, existing 3 D weaving technology also cannot 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, adopt flat fabric, and prepare curvilinear style special-shaped component by laying and cutting operation; Its shortcoming is: size accuracy and uniformity when cutting between each layer of fabric are wayward, and the layer structure that laying causes makes the interlayer globality of fabric poor, very easily produces delamination failure, and impact flexibility and the damage tolerance of prepared composite are lower; 2, sewing, on the basis of three-dimension integrally braiding technique, abnormal shape part is coupled together to formation prefabricated component with suture according to certain sewing process parameter, the method has overcome conventional composite materials laminate structures owing to there is no 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 current employing laying method and has adopted the fibre damage problem of sewing, prepared curvilinear style variable cross-section stepped plate, without further splicing, there is the spacial framework of height integration, thereby the integrality of product structure and the stability of mechanical property are effectively guaranteed, reduce operation simultaneously, reduce costs.
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 basis, yarn device and the spindle characteristics of motion are taken in control, the predetermined space curve of fitting while making prefabricated component moulding, forming curves formula variable cross-section stepped plate, it is characterized in that, in braiding process, the yarn that moves carrying 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, on 3 D weaving machine, hang the capable and n row yarn of m, according to four step rule square 3 D weaving craft woven to predetermined length; By 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; Finally stop the spindle that moves right, to predetermined length, complete 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, arranges and hangs 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 and is carried on spindle;
Second step, take up one's knitting: adopt four step rule square 3 D weaving technique, the 1st step makes knitting yarn spindle distance of alternating movement in the row direction of adjacent lines, the 2nd step makes the knitting yarn of adjacent column along spindle distance of column direction alternating movement, in the 3rd step, the 4th step, the direction of motion of yarn is contrary with the 1st step, the 2nd step respectively, through above-mentioned four steps motions, completes a braiding circulation, repeat above-mentioned four movement step, until predetermined length;
The 3rd step, moves yarn operation: by 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, continues braiding: proceed follow-up braiding according to the braid method described in second step, until woven curvilinear style variable cross-section stepped plate.
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, solve the fibre damage problem of lamination problem and the employing sewing of current employing laying method, structural integrity and the stable mechanical property of prefabricated component are effectively guaranteed, reduced manufacturing procedure simultaneously, improve formation speed, reduced production cost.
Accompanying drawing explanation
Fig. 1 is the initial arrangement schematic diagram that spindle is uploaded on 3 D weaving machine chassis; In Fig. 1,1 for carrying spindle;
Fig. 2 for to the right one row move after yarn, the arrangement schematic diagram of spindle is uploaded on 3 D weaving machine chassis; In 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 spindle 1; As shown in Figure 2, for to the right one row move after yarn, the arrangement schematic diagram of spindle is uploaded on 3 D weaving machine chassis,
Take concrete curvilinear style variable cross-section stepped plate as example, set forth the present invention below.
embodiment 1
As shown in Figure 3, be a kind of schematic perspective view of curvilinear style variable cross-section stepped plate, adopt 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 360 knitting yarns are suspended from and are carried on spindle according to the arrangement mode of 60 row, 6 row; Second step, adopt four step rule square 3 D weaving technique, the 1st step makes knitting yarn spindle distance of alternating movement in the row direction of adjacent lines, the 2nd step makes the knitting yarn of adjacent column along spindle distance of column direction alternating movement, in the 3rd step, the 4th step, the direction of motion of yarn is contrary with the 1st step, the 2nd step respectively, through above-mentioned four steps motions, completes a braiding circulation, repeat above-mentioned four movement step, be woven into predetermined length; The 3rd step, by the move right distance of a spindle of all knitting yarns, weaves 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, proceeds follow-up braiding according to the braid method described in second step, until woven, obtains width and is about 5cm, and 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 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 2880 knitting yarns are suspended from and are carried on spindle according to the arrangement mode of 120 row, 24 row; Second step, adopt four step rule square 3 D weaving technique, the 1st step makes knitting yarn spindle distance of alternating movement in the row direction of adjacent lines, the 2nd step makes the knitting yarn of adjacent column along spindle distance of column direction alternating movement, in the 3rd step, the 4th step, the direction of motion of yarn is contrary with the 1st step, the 2nd step respectively, through above-mentioned four steps motions, completes a braiding circulation, repeat above-mentioned four movement step, be woven into predetermined length; The 3rd step, by the move right distance of a spindle of all knitting yarns, weaves 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, proceeds follow-up braiding according to the braid method described in second step, until woven, obtains width and is about 10cm, and 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 basis, yarn device and the spindle characteristics of motion are taken in control, the predetermined space curve of fitting while making prefabricated component moulding, forming curves formula stepped plate, is characterized in that, in braiding process, the yarn that moves carrying 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, on 3 D weaving machine, hang the capable and n row yarn of m, according to four step rule square 3 D weaving craft woven to predetermined length; By 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; Finally stop the spindle that moves right, to predetermined length, complete 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 and is carried on spindle;
Second step, adopt four step rule square 3 D weaving technique, the 1st step makes knitting yarn spindle distance of alternating movement in the row direction of adjacent lines, the 2nd step makes the knitting yarn of adjacent column along spindle distance of column direction alternating movement, in the 3rd step, the 4th step, the direction of motion of yarn is contrary with the 1st step, the 2nd step respectively, through above-mentioned four steps motions, completes a braiding circulation, repeat above-mentioned four movement step, until predetermined length;
The 3rd step, by the move right distance of a spindle of all knitting yarns, weaves 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, proceeds follow-up braiding according to the braid method described in second step, until woven curvilinear style variable cross-section stepped plate.
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| CN108998888B (en) * | 2018-08-08 | 2021-01-19 | 天津工大航泰复合材料有限公司 | Three-dimensional weaving method for row-column transformation variable-section preformed part and part |
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