Special-shaped curved quasi- three-dimensional weave and its weaving method and applicationTechnical field
The present invention relates to a kind of weavings, particularly relate to the special-shaped curved quasi- three-dimensional weave of one kind and its weaving methodWith application.
Background technique
Antenna house is the high-strength light shell structure of a kind of high temperature resistant, resistance to high magnetic wave penetration capacity, heat, electricity, structural strengthIt is required with comprehensive performances such as rigidity harsh.Antenna house external and internal compositions are abnormal curved surface, and aerodynamic configuration is Duckbill type Waverider knotStructure, the inside and outside type face of antenna house are special-shaped free form surface, become the braiding structure of wall thickness feature.This kind of part there are negative cruvature structure,Since there are tension to tend not to pad pasting for fiber during 2.5 dimensions shallowly hand over curved binding to knit；Furthermore needle thorn and puncture were weavingSteel needle ties up rate and leads to the inhomogeneities of knitted body itself to the damage of fiber in journey.The above fabric during impregnation byLead to the inconsistent of impregnation, the Density inhomogeneity of cover in the influence of structure, even if electricity is thick under physical thickness unanimous circumstancesDegree often has differences, and leading to the electrical property of antenna house, there are errors.Therefore during weaving textile, to consider the friendship of fiberThe consistency for knitting overlapping considers the fibre density of fabric, the combined influence of fibre diameter.
Summary of the invention
The purpose of the present invention is to provide special-shaped curved quasi- three-dimensional weave and its weaving sides that one kind does not damage fiberMethod and application.
To achieve the above object, the weaving method of the special-shaped curved quasi- three-dimensional weave designed by the present invention, including such asLower step:
1) according to the configuration design of fabric and the core model of hollow structure is made, is distributed on core model and sets according to the fiber of fabricSet the multiple and comparable pin hole of normal direction fiber thickness；
2) steel needle of the, length identical as fabric normal direction fiber number not less than the sum of fabric thickness and core model thickness by quantityBackshank put on normal direction fiber respectively, then the needle point of every steel needle is passed through into a pin hole outwardly inside core model and stays backshankIt sets in pin hole；
3) warp fiber and weft fiber are wound in the steel needle gap on the outer surface of core model, complete through to broadwiseFibrous layer braiding；
4) when warp fiber and weft fiber reach specified thickness distribution, steel needle and normal direction fiber is stayed in by eradicating outIn fibrous layer, fibrous layer is compressed using Prepressing working, demoulding obtains special-shaped curved quasi- three-dimensional weave.
Preferably, in step 1), the spacing all around of pin hole is 1~20mm, and more excellent is 3~8mm.
Preferably, in step 3), the fibrous layer weaving method of Jing Xiangyu broadwise are as follows: according to one layer of warp fiber and one layer of latitudeAlternating orthogonal is carried out to fiber to arrange.Further, through increasing warp by part to during braiding with the fibrous layer of broadwiseTo the number of plies of fiber or weft fiber, or by variation warp fiber or the Denier number of weft fiber, or by changing partFibre density changes the local thickness of fibrous layer.
Preferably, in step 3), the fibrous layer weaving method of Jing Xiangyu broadwise are as follows: form fiber and core model axis centainlyAngle, by being wound the fibrous layer being bonded with mold, per being in opposite trend between adjacent fibrous layer, with mould shaftLine forms the angle of symmetrical equivalence, the fibrous layer formed by this way, it is axial with through to component respectively correspond through toFiber and weft fiber.Further, the angle of fiber and core model axis is 10 °~80 °, and more excellent is 25 °~65 °.FurtherGround, through by part later around yarn, or passing through increase local fiber Denier to during braiding with the fibrous layer of broadwiseNumber, or change the local thickness of fibrous layer by changing local winding density.
Preferably, in step 4), the Prepressing working includes that pedestal, the first pressing plate being fixed on pedestal and use compressBe bolted to the second pressing plate of the first pressing plate side, first pressing plate and the second pressing plate respectively with the side shape phase of core modelMatching, the two form the inner cavity for just accommodating core model after closing up.Further, the lower part of the core model is provided with skirt, describedLocation hole is provided on skirt；Core model positioning device is additionally provided on the Prepressing working, the core model positioning device includes coreMould positioning screw, screw holder and screw limiting block, the both ends of the positioning screw are threaded in screw holder respectivelyOn screw limiting block, the screw holder is fixed on the pedestal of Prepressing working, and the screw limiting block can be inserted into positioningCore model is positioned in hole, core model when the second pressing plate of installation is avoided to be subjected to displacement.
Invention also provides using special-shaped curved quasi- three-dimensional weave made of the weaving method and this is differentApplication of the quasi- three-dimensional weave of type curved surface on antenna house.
Compared with prior art, remarkable advantage of the invention is:
1) the structure design orthogonal using quasi- three-dimensional, realizes the molding of three-dimensional contoured fabrics, by adjusting steel needle density,Change each volume content to fiber, realizes the corresponding design of different stress condition components.
2) each opposite continuity to fiber is realized, needle thorn and damage of the integrated piercing to fiber is overcome, reachesThe good mechanical properties and high reliability of contoured fabrics structure.
3) uniformity for realizing the fiber content of contoured fabrics ensure that subsequent compound uniformity, reach differenceThe compound uniformity of thickness, different structure.
4) density of the technological parameter and steel needle of weaving textile is corresponding, realizes the designability of contoured fabrics parameter.
Detailed description of the invention
Fig. 1 is the stereoscopic schematic diagram of core model designed by the present invention.
Fig. 2 is the normal direction fiber arrangement schematic diagram of Fig. 1 core mould bottom (being free of skirt).
Fig. 3 is by the arrangement schematic diagram of normal direction fiber on the core model section that A-A is splitted in direction along Fig. 2.
Fig. 4 is the structural schematic diagram of Prepressing working designed by the present invention (containing core model and fabric).
Fig. 5 is the positive structure diagram of Prepressing working in Fig. 1.
Fig. 6 is the unit cell figure of special-shaped curved quasi- three-dimensional produced by the present invention.
Fig. 7 is the stereoscopic schematic diagram of antenna house produced by the present invention
Wherein: core model 1, pin hole 1.1, skirt 1.2, location hole 1.3, steel needle 2, warp fiber 3.1, weft fiber 3.2, methodTo fiber 3.3, Prepressing working 4, pedestal 4.1, the first pressing plate 4.2, the second pressing plate 4.3, hold-down bolt 4.4, reinforcing rib 4.5, coreMould positioning device 5, core model positioning screw 5.1, screw holder 5.2, screw limiting block 5.3, antenna house 6
Specific embodiment
The following further describes the present invention in detail with reference to the accompanying drawings and specific embodiments.
The weaving method of special-shaped curved quasi- three-dimensional weave provided by the present invention, includes the following steps:
1) core model makes
According to antenna house shape using polytetrafluoroethylene (PTFE) production core model (1), as shown in Figure 1, core model (1) is hollow structure,Its underpart is provided with skirt (1.2), and several location holes (1.3) are provided on skirt (1.2), wherein being located among the protrusion side of bottomLocation hole (1.3) be rectangle.1.5mm × 1.5mm pin hole (1.1) square is formed on core model (1) according to the needs of fabric constructionBattle array.
2) steel needle is placed in
As shown in Figure 2 and Figure 3, by the pre- threading method in steel needle (2) tail portion to fiber (3.3), then by steel needle (2) from core model (1)Pin hole is pierced by fixation in (1.1) from inside to outside, and 1.5mm × 1.5mm steel needle (2) matrix is formed on core model (1), guarantees steel needle(2) extension elongation is greater than fabric thickness.
3) through the fibrage to, broadwise
Replace with one layer of weft fiber (3.2) according to one layer of warp fiber (3.1) through the fibrage to, broadwise and hang downDirectly arrange.
Wherein, through to weaving method are as follows: warp fiber (3.1) is fixed at core model (1) bottom side steel needle (2), edgeTwo rows of steel needle (2) gaps are close to core model (1) and are laid with, and after at the top of core model (1), continue to detour downwards another to core model (1) bottomSide steel needle is fixed at (2).Aforesaid operations are repeated, the braiding of single layer warp fiber (3.1) is gradually completed.
Broadwise weaving method are as follows: weave weft fiber (3.2) along circumferential direction, by two column steel needle (2) gaps, tightlyIt pastes core model (1), circumferential direction detours, until single layer weft fiber (3.2) braiding is completed.
Aforesaid operations are repeated, are alternately accomplished through the fibrage to, broadwise.
During braiding, for the position that the needs such as seamed edge, back thicken, takes and uniformly increase warp at every layer of corresponding positionThe method of yarn layer thickness is realized.
4) fabric pre-molding
By steel needle of eradicating out (2), all steel needles (2) are all replaced into normal direction fiber (3.3), then use Prepressing working (4)Fibrous layer is compressed.
As shown in Figure 4, Figure 5, Prepressing working (4) used by the step includes pedestal (4.1), the first pressing plate (4.2),Two pressing plates (4.3) and core model positioning device (5), the first pressing plate (4.2) and the second pressing plate (4.3) side with core model (1) respectivelyShape matches, and the two forms the inner cavity for just accommodating core model (1) after closing up.
First pressing plate (4.2) is fixed on pedestal (4.1), and outside is provided with reinforcing rib (4.5).
Second pressing plate (4.3) is removably connected with the first pressing plate (4.2) using hold-down bolt (4.4).
Core model positioning device (5) includes core model positioning screw (5.1), screw holder (5.2) and screw limiting block(5.3), the both ends of positioning screw are threaded in respectively in screw holder (5.2) and screw limiting block (5.3), and screw rod is solidReservation (5.2) is fixed on the pedestal (4.1) of Prepressing working (4).
When carrying out precompressed, the second pressing plate (4.3) are removed first, core model (1) are placed on installation site, by screw limiting block(5.3) core model (1) is positioned in insertion location hole (1.3), then by the second pressing plate (4.3) on the outside of the core model (1) with firstPressing plate (4.2) closes up, and is fixed by hold-down bolt (4.4) and compresses core model (1).
Demoulding obtains special-shaped curved quasi- three-dimensional weave, and fabric single cell structure is as shown in Figure 6.
The special-shaped curved quasi- three-dimensional weave is compound through subsequent high solids content silica solution+concentration integrated dipping, 900 DEG C of roastingsAntenna house 6 as shown in Figure 7 is obtained after processing, improves its densification degree.
Process provided by the present invention can be used for the knitting forming of complex-curved structure, for subsequent compound working procedureThe uniformity and efficiency of dipping are all significantly improved.The weaving formed precision of obtained special-shaped curved antenna house is higher,The braiding needs for meeting negative cruvature, fully meet product design required precision.