CN110549644A - Antenna cover plate and profiling prefabricated member thereof - Google Patents
Antenna cover plate and profiling prefabricated member thereof Download PDFInfo
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- CN110549644A CN110549644A CN201910844609.XA CN201910844609A CN110549644A CN 110549644 A CN110549644 A CN 110549644A CN 201910844609 A CN201910844609 A CN 201910844609A CN 110549644 A CN110549644 A CN 110549644A
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- 239000000835 fiber Substances 0.000 claims abstract description 141
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- 239000010410 layer Substances 0.000 claims description 109
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- 238000009958 sewing Methods 0.000 claims description 34
- 238000010030 laminating Methods 0.000 claims description 23
- 239000011229 interlayer Substances 0.000 claims description 15
- 230000008719 thickening Effects 0.000 claims description 9
- 238000003475 lamination Methods 0.000 claims description 5
- 238000005429 filling process Methods 0.000 claims description 3
- 239000011347 resin Substances 0.000 claims description 3
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- 238000004804 winding Methods 0.000 claims 1
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
- B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
- B29C70/28—Shaping operations therefor
- B29C70/30—Shaping by lay-up, i.e. applying fibres, tape or broadsheet on a mould, former or core; Shaping by spray-up, i.e. spraying of fibres on a mould, former or core
- B29C70/34—Shaping by lay-up, i.e. applying fibres, tape or broadsheet on a mould, former or core; Shaping by spray-up, i.e. spraying of fibres on a mould, former or core and shaping or impregnating by compression, i.e. combined with compressing after the lay-up operation
- B29C70/345—Shaping by lay-up, i.e. applying fibres, tape or broadsheet on a mould, former or core; Shaping by spray-up, i.e. spraying of fibres on a mould, former or core and shaping or impregnating by compression, i.e. combined with compressing after the lay-up operation using matched moulds
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
- B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
- B29C70/28—Shaping operations therefor
- B29C70/54—Component parts, details or accessories; Auxiliary operations, e.g. feeding or storage of prepregs or SMC after impregnation or during ageing
Abstract
The invention discloses an antenna cover plate and a profiling prefabricated member thereof, wherein the profiling prefabricated member comprises a cover body and an extending part which extends outwards along the edge of an opening of the cover body; the cover body and the extension part are integrally formed by overlapping and tiling a plurality of stacked units; all the laminated units are connected through a suture line penetrating through the thickness direction, the laminated units are formed by sequentially laying a plurality of laying layers on the outer surface of the mold along the thickness direction, and each laying layer is of a three-dimensional structure. The problem of among the prior art tiling layer discontinuous fiber lead to mainly bearing shearing stress between the layer and extravagant raw and other materials is solved, realize tiling layer continuous fiber, along the main atress of fibre direction, improve the bulk strength and reduce the processing allowance, practice thrift raw and other materials.
Description
Technical Field
The invention relates to the technical field of aerospace and aviation devices, in particular to an antenna cover plate and a profiling prefabricated member thereof.
Background
Due to factors such as the use environment, the antenna is usually arranged in a space surrounded by the radome and the antenna cover plate for protecting the antenna, the radome and the antenna cover plate need to be made of wave-transmitting materials and have certain strength, and the radome and the cover plate are usually obtained by processing prefabricated parts.
Referring to fig. 1, the conventional antenna cover plate is obtained by machining a plurality of plate preforms 10 formed by stacking and needling a stacking unit formed by fiber cloth and a mesh tire, the side surface of the antenna cover plate 20 obtained by the method is obtained by longitudinally cutting interlayer fibers, and the whole side surface is formed by stacking a plurality of cut short fibers 21 in the height direction, mainly subjected to interlayer cutting stress and low in strength; and the processing allowance is very large, thereby wasting a large amount of silicon dioxide fiber raw materials and processing cost.
Disclosure of Invention
The invention provides an antenna cover plate and a profiling prefabricated member thereof, which are used for overcoming the defects that strength is reduced and raw materials are wasted greatly due to the fact that continuous fibers are cut off in the prior art, realizing the continuity of the whole fibers of a tiled layer, greatly improving the strength, reducing the processing allowance and saving silicon dioxide fiber raw materials.
In order to achieve the above object, the present invention provides a profiling preform for an antenna cover plate, which includes a cover body and an extending portion extending outwards along the edge of an opening of the cover body; the cover body and the extension part are integrally formed by overlapping and tiling a plurality of stacked units; all the laminated units are connected through a suture line penetrating through the thickness direction, the laminated units are formed by sequentially laying a plurality of laying layers on the outer surface of the mold along the thickness direction, and each laying layer is of a three-dimensional structure.
In order to achieve the purpose, the invention also provides an antenna cover plate, which is formed by integrating a prefabricated part and a wave-transmitting resin material embedded into the prefabricated part and fused on the surface of the prefabricated part through a vacuum filling process and curing the integrated parts; the prefabricated part is the antenna cover plate profiling prefabricated part.
according to the antenna cover plate and the profiling prefabricated member thereof, the laminating units are paved layer by layer on a mould with the same shape as the antenna cover plate to form a continuous flat layer, and the connection between the laminating units is completed through a suture line penetrating through the thickness direction of the laminating units; compared with the antenna cover plate prefabricated part obtained by adopting a processing mode in the prior art, the flat laying layer is provided with continuous fibers, the phenomenon that stress in a certain area is unbalanced is avoided, the overall strength and the performance are higher, the consumption of raw materials is greatly reduced, the machining cost is saved, and the cost is reduced.
Drawings
in order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.
FIG. 1 is a schematic diagram of a prior art structure;
Fig. 2 is a schematic structural diagram of a profiling preform of an antenna cover plate according to an embodiment of the present invention;
FIG. 3 is a schematic structural diagram of a mold used in an embodiment of the present invention;
Fig. 4 is a schematic structural diagram of a profiling preform of an antenna cover plate according to a second embodiment of the present invention;
fig. 5 is a second schematic structural diagram of a profiling preform of an antenna cover plate according to a second embodiment of the present invention;
Fig. 6 is a schematic structural diagram of a mold used in the second embodiment of the present invention.
The reference numbers illustrate:
The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
it should be noted that all the directional indicators (such as up, down, left, right, front, and rear … …) in the embodiment of the present invention are only used to explain the relative position relationship between the components, the movement situation, etc. in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indicator is changed accordingly.
in addition, the descriptions related to "first", "second", etc. in the present invention are only for descriptive purposes and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "connected," "secured," and the like are to be construed broadly, and for example, "secured" may be a fixed connection, a removable connection, or an integral part; the connection can be mechanical connection, electrical connection, physical connection or wireless communication connection; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
in addition, the technical solutions in the embodiments of the present invention may be combined with each other, but it must be based on the realization of those skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination of technical solutions should not be considered to exist, and is not within the protection scope of the present invention.
Example one
As shown in fig. 2 and fig. 3, the profiling prefabricated member of the antenna cover plate comprises a cover body and an extending part extending outwards along the edge of an opening of the cover body; the cover body and the extension part are integrally formed by overlapping and tiling a plurality of stacked units; all the laminated units are connected by a seam 14 penetrating the thickness direction; the stacking unit is formed by sequentially laying a plurality of laying layers on the outer surface of the mold along the thickness direction, and each laying layer is of a three-dimensional structure.
specifically, each flat laying layer is formed by deforming planar sheet raw materials through adjusting fiber gaps, a three-dimensional structure matched with the appearance of the mold is formed finally, the laying steps are repeated on the laying layers in sequence, finally, the laying of a stacking unit is completed, and the laying of the stacking unit is repeated to complete the preform blank. The raw materials adopted are usually silicon dioxide fiber cloth or net tires, the fiber cloth is formed by weaving longitudinal and transverse bidirectional fibers, and gaps among the fibers can be adjusted; the net layer is formed by weaving a plurality of short fibers, and the gaps among the fibers can be adjusted.
The antenna cover plate prefabricated member is formed by laying continuous fibers on the whole of the plane part 11, the peripheral side part 12 and the top surface part 13, compared with the prior art, the continuous size of the fiber cloth is greatly prolonged, the large-size continuous fibers of the fiber cloth are stressed in the length direction under the common condition during stress, and the stress is not applied among layers, so that the strength and the service performance are greatly improved.
The top point of the cover body is pointed in the laying process and is often exposed in a fiber gap easily, so that the integral uniformity of a laid layer is influenced, and the formed prefabricated part is easy to cause a stress weak area at the top point of the cover body. The thickened piece is generally made of the same raw material as the laying layer, and can be fiber cloth in the lower puncture prefabricated part; in the following needled preform, it may be a fiber cloth or a net tire.
In order to improve the interlayer bonding force, in an embodiment of the present invention, an antenna cover plate piercing preform is provided, where the stacking unit includes two or more layers of woven fiber cloth; at least two adjacent stacked units are connected through a through suture.
In order to improve threading and sewing efficiency, the die can adopt a die with a threading groove, and a single threading wire continuously penetrates through the sewing layer and is respectively positioned at two sides of the sewing layer.
The mold 100 comprises a plane part 101 and a bulge located at the center of the plane part 101, the bulge is of a cuboid structure and comprises an arc-shaped top surface 102 and a peripheral side surface 103 located at the periphery of the top surface, the peripheral side surface 103 comprises two opposite transverse side surfaces 103a and two opposite longitudinal side surfaces 103b, and the step of laying the laminated unit comprises the following steps:
S1, continuously laying a layer of fiber cloth on the outer surface of the mould;
The fiber cloth is woven by the woven cloth layer and is woven by the bidirectional fibers, the fiber cloth covers the die, and the center position of the fiber cloth is opposite to the center position of the raised top surface of the die, so that the waste of raw materials is reduced.
S2, adjusting the fiber gap of the fiber cloth on the convex part of the mould to make the fiber cloth fit with the outer surface of the mould and form a fiber cover;
The process can be adjusted manually or by a mould, the fiber cloth is deformed by the change of the gaps between longitudinal and transverse bidirectional fibers, a three-dimensional fiber cover is formed after the deformation, the fiber cover integrally covers the outer surface of the mould and has the same shape as the whole shape of the antenna cover prefabricated member, a prefabricated member blank is formed by laying a plurality of layers of fiber covers, and the prefabricated member blank formed by the method is continuous on the whole laying layer and has no fault or short fiber, so the integral performance is greatly enhanced.
The first lamination unit 1 may be formed by a single thread penetrating sewing in order to increase the interlayer coupling force, the single thread penetrating wire continuously penetrating the sewing layer and being respectively positioned at both sides of the sewing layer.
at this point, the laying of the first stacking unit 1 is completed, and after the laying is completed, the penetrating stitching can be completed through the wire chase 104 on the mold 100; repeating the steps to finish the laying of the second laminated unit 2, and sewing the first laminated unit 1 and the second laminated unit 2 in a penetrating way; repeating the steps to finish the laying of the third laminating unit 3, and sewing the first laminating unit 1, the second laminating unit 2 and the third laminating unit 3 in a penetrating way; repeating the above steps until the laying of the Nth laminated unit N is completed, and stitching the first laminated unit 1, the second laminated unit 2 and the third laminated unit 3 … … to form the Nth laminated unit N; the sewing does not need to be demoulded after the stacking and laying are finished every time, and the preparation efficiency is improved. After demoulding, the wire can be integrally penetrated and sewed according to any shape without being constrained by the shape of the wire groove during sewing in the laying process.
The fiber cloth is stretched in the laying process, the top surface and the top edge of the peripheral side surface are the positions where the stress is the greatest, so that the fiber at the positions is easy to generate gaps, the thickness of the fiber is thinner than that of other parts, obvious thickness difference is easy to generate after multilayer laying, and generally when the thickness difference at the top edge is smaller than that of one layer of fiber cloth, fiber cloth thickening sheets are respectively laid at the top edges, between the top surface and the peripheral side surface of the fiber cover, of the convex part of the mold.
The fiber cloth thickening sheet and the laid fiber cloth are made of the same raw materials, the shape can be round, oval, square or irregular, the fiber cloth thickening sheet is used for filling the difference in thickness of the top position caused by stretching, the next layer of fiber cloth is laid at the top position in the laying process, and the thickening sheet laid at the top position can be enclosed between the two layers of fiber covers after the next layer of fiber cloth forms the fiber cover.
as another preferred embodiment, the laminated unit further comprises a fiber net cover, wherein the fiber net cover is positioned between two layers of woven fiber cloth; the fiber net cover comprises a plurality of radial fibers and a weft fiber, and the weft fiber is woven between the radial phases in a reciprocating mode.
The fiber net sleeve can be formed by weaving, and compared with the three-dimensional structure formed by laying the planar fiber cloth, the fiber net sleeve is formed by weaving at the vertex without thickening sheets, so that the overall strength is higher.
Example two
Providing an antenna cover plate needling preform, referring to fig. 4-6, the lamination unit comprises at least two layers of woven fiber cloth 1a and a layer of mesh 1 b; short fibers of the net layer in the laminated unit positioned at the innermost layer are combined with two layers of woven fiber cloth along the thickness direction to complete interlayer combination in the laminated unit; and between the adjacent laminated units adjacent to the innermost laminated unit and the adjacent laminated unit positioned outside the innermost laminated unit, completing interlayer bonding between the two adjacent laminated units through the short fibers of the net layer of one laminated unit. In this example, the fiber cloth and the web are laid by the same procedure as that of the fiber cloth for the pierced preform in the first example, and the flat material is deformed by adjusting the gaps between the woven fibers in the fiber cloth or the gaps between the woven short fibers in the web, thereby forming a three-dimensional structure conforming to the outer shape of the mold.
A fiber cloth layer can be laid firstly, and then the net-shaped layer is wrapped on the outer surface of the fiber layer; or a net bed layer can be laid firstly, and then the fiber cloth is wrapped on the outer surface of the net bed layer; then when the short fibers are pierced into or out of the laminating unit through needling, the short fibers of the net layer are brought into the fiber layer through the radially overhanging needling on the needling to complete the in-layer combination of the laminating unit; then, the laying of the laminating units is repeated, and the previous laminating unit and the current laminating unit are pierced by a needle punch to complete the combination of the two adjacent laminating units; repeating the laying of the laminated units and the needling combination of the two adjacent laminated units or the needling combination of all the laid laminated units; until the needling of all the laminated units is completed; finally, demolding the semi-finished product of the prefabricated part subjected to needling, and then finishing the preparation of the prefabricated part by penetrating and sewing; the thread for through-sewing here includes a sewing bottom thread which is provided on the inner surface of the innermost laminated unit and a sewing upper thread which passes through the outer surface of the outermost laminated unit after being interlaced with the sewing bottom thread in the thickness direction of all the laminated units and completes the movement of the needle pitch.
Compared with the prior art, the fibers of the antenna cover plate in all directions are uniform and continuous, the stress imbalance of a certain area is avoided, the overall strength and the performance are high, the consumption of raw materials is greatly reduced, the cost is reduced, the needling process is completed through mechanized equipment, and the production efficiency can be guaranteed.
Preferred embodiment 1
Referring to fig. 4, all the stacking units sequentially comprise a first woven fiber cloth, a second woven fiber cloth and a mesh layer from inside to outside; all the laminated units are laid according to the same sequence to form a structure of one net layer of woven fiber cloth at every two layers; the fiber cloth is used as an initial laying layer; short fibers of the net layer in the laminated unit positioned at the innermost layer are combined with two layers of woven fiber cloth along the thickness direction to complete interlayer combination in the laminated unit; and between the adjacent laminated units adjacent to the laminated unit at the innermost layer and the adjacent laminated units positioned outside the laminated unit at the innermost layer, the interlayer combination between the two adjacent laminated units is completed through the short fibers of the net layer of the laminated unit at the outer layer.
The antenna cover plate profiling prefabricated member with the structure is needled to complete the bonding of short fiber layers in the process that barbed needles are penetrated inwards on the outer surface of the laminating unit. The antenna cover plate prefabricated member is formed by paving continuous fibers on the plane part 11, the peripheral side part 12 and the top surface part 13, compared with the prior art, the continuous size of the fiber cloth is greatly prolonged, and the fiber cloth is stressed in the length direction of the large-size continuous fibers under the common condition in stress instead of being stressed among layers, so that the strength and the service performance are greatly improved.
The mold 100 comprises a plane part 101 and a bulge located at the center of the plane part 101, the bulge is of a cuboid structure and comprises an arc-shaped top surface 102, two opposite transverse side surfaces 103a and two opposite longitudinal side surfaces 103b which are located at the periphery of the top surface, in a three-dimensional structure formed after fiber cloth is laid, the two opposite transverse side surfaces 103a and the two opposite longitudinal side surfaces 103b which are close to the arc-shaped top surface 102 and located at the periphery of the top surface 102 can form a whole, at least transverse fibers are continuous on the two opposite transverse side surfaces 103a and the arc-shaped top surface 102, the longitudinal fibers are continuous on the two opposite longitudinal side surfaces 103b and the arc-shaped top surface 102, and the transverse fibers are continuous with the plane part after being deformed on the longitudinal side surfaces and the longitudinal fibers on the transverse side surfaces.
repeating the steps to finish the laying of the second layer of fiber cloth;
Repeating the steps to finish the laying of the net tire;
Finishing the laying of the first stacking unit 1, and finishing the in-layer combination through needling after finishing the laying; repeating the steps to finish the laying of the second laminating unit 2, and needling and combining the first laminating unit 1 and the second laminating unit 2; repeating the steps to finish the laying of the third laminating unit, and needling and combining the second laminating unit 2 and the third laminating unit 3; repeating the steps until the laying of the Nth laminated unit is completed, the Nth-1 laminated unit and the Nth laminated unit N are combined in a needling mode, and finally the Nth laminated unit N of the first laminated unit 1, the second laminated unit 2 and the third laminated unit 3 … … is sewn in a penetrating mode; after demoulding, the whole thread can be threaded and sewed according to any shape.
The cross section of the antenna housing profiling prefabricated part can be rectangular, regular polygon and the like; the above-mentioned shape is not limited to the above-mentioned specific examples.
The cross section of the radome profiling preform can also be circular or elliptical. The concrete laying process is the same as the above, the top point of the sharp corner does not exist, and the laying step of the thickening layer can be omitted.
Preferred embodiment two
Referring to fig. 5, all the stacking units sequentially comprise a net blank 1b, a first woven fiber cloth and a second woven fiber cloth from inside to outside; all the laminated units are laid according to the same sequence to form a structure of one net layer of woven fiber cloth at every two layers; the difference from the first preferred embodiment is that the net layer is used as an initial laying layer; the short fibers 15 of the net layer in the laminated unit positioned at the innermost layer are combined with two layers of woven fiber cloth along the thickness direction to complete the intra-layer combination inside the laminated unit; and between the adjacent laminated units adjacent to the innermost laminated unit and the adjacent laminated unit positioned outside the innermost laminated unit, the interlayer combination between the two adjacent laminated units is completed through the short fibers of the net layer of the laminated unit of the inner layer.
The continuous state of the laid-up is the same as in the first preferred embodiment described above.
The profiling prefabricated member of the antenna cover plate with the structure is needled to complete the bonding of the short fiber layers by the positively-needled needle in the process that the inner surface of the laminating unit returns outwards.
Preferred embodiment three
All the laminated units sequentially comprise a first woven fiber cloth, a fiber net sleeve and a net tire layer from inside to outside; the fiber net sleeve has the same function as the fiber net sleeve and is used for enhancing the annular fiber strength.
on the basis of the first preferred embodiment and the second preferred embodiment, the fiber mesh sleeve is formed by weaving a plurality of radial fibers and one weft fiber, the weft fiber is continuous on each side surface of the cover body, the circumferential strength of the antenna cover preform can be improved, the fiber mesh sleeve is formed by weaving fibers at the vertex position, weak areas are not easy to generate, thickening layers are not needed, continuous laying layers are formed from different directions respectively, and the tensile strength in different directions can be improved.
The fiber directions of the mesh layer and the fiber cloth layer are the same, so that the interlayer combination effect in the laminated unit is improved, and the interlayer shear resistance is improved.
on the basis of the first and second embodiments, all the laminated units are connected by sewing through the sewing thread 14;
The sewing thread comprises a sewing bottom thread and a sewing upper thread, the sewing bottom thread is positioned on the inner surface of the laminated unit at the innermost layer, and the sewing upper thread passes through the thickness direction of all the laminated units and is interwoven with the sewing bottom thread to and fro and then finishes the movement of the needle pitch on the outer surface of the laminated unit at the outermost layer.
The sewing mode can adopt manual sewing, tension is applied to the sewing thread in the sewing process, the sewing thread in the sewn prefabricated member is in a tension state, the laminated units can be tightly sewn together, the interlayer gap is reduced, and the interlayer bonding force is improved.
EXAMPLE III
Based on the first embodiment and the second embodiment, the invention provides an antenna cover plate, which is formed by integrating a prefabricated part and a wave-transmitting resin material embedded into the prefabricated part and on the surface of the prefabricated part through a vacuum filling process and curing the integrated parts; the preform is the antenna cover plate profiling preform of any of the embodiments described above. The antenna cover plate formed by the prefabricated member also has the advantages of high overall strength and performance, greatly reduced consumption of raw materials, saved machining cost, reduced cost and other technical effects, and is not repeated herein.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention, and all modifications and equivalents of the present invention, which are made by the contents of the present specification and the accompanying drawings, or directly/indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (10)
1. a profiling prefabricated member of an antenna cover plate comprises a cover body and an extending part extending outwards along the edge of an opening of the cover body; the novel mask is characterized in that the mask body and the extending part are integrally formed by overlapping and tiling a plurality of laminating units; all the laminated units are connected through a suture line penetrating through the thickness direction; the stacking unit is formed by sequentially laying a plurality of laying layers on the outer surface of the mold along the thickness direction, and each laying layer is of a three-dimensional structure.
2. The profiling preform for an antenna cover plate of claim 1, wherein the lamination unit comprises two or more layers of woven fiber cloth;
at least two adjacent stacked units are connected through a through suture.
3. The contoured preform for an antenna cover plate of claim 2, wherein said lamination unit further comprises a layer of fiber mesh positioned between two layers of woven fiber cloth;
the fiber mesh sleeve comprises a plurality of radial fibers and a weft fiber, and the weft fiber is formed by spirally and continuously winding between the radial fibers.
4. The contoured preform for an antenna cover plate of claim 1, wherein said lamination unit comprises at least two layers of woven fiber cloth and a layer of mesh;
short fibers of the net layer in the laminated unit positioned at the innermost layer are combined with two layers of woven fiber cloth along the thickness direction to complete the intra-layer combination inside the laminated unit;
And between the adjacent laminated units adjacent to the innermost laminated unit and the adjacent laminated unit positioned outside the innermost laminated unit, the interlayer bonding between at least two adjacent laminated units is completed through the short fibers of the net layer of one laminated unit.
5. The profiling preform of claim 4, wherein all the laminated units sequentially comprise a first woven fiber cloth, a second woven fiber cloth and a mesh layer from inside to outside;
Short fibers of the net layer in the laminated unit positioned at the innermost layer are combined with two layers of woven fiber cloth along the thickness direction to complete the intra-layer combination inside the laminated unit;
And between the adjacent laminated units adjacent to the innermost laminated unit and the adjacent laminated unit positioned outside the innermost laminated unit, the interlayer bonding between at least two adjacent laminated units is completed through the short fibers of the net layer of the laminated unit of the outer layer.
6. the profiling preform of claim 4, wherein the laminating unit comprises a mesh layer, a first woven fiber cloth and a second woven fiber cloth from inside to outside;
Short fibers of the net layer in the laminated unit positioned at the innermost layer are combined with two layers of woven fiber cloth along the thickness direction to complete the intra-layer combination inside the laminated unit;
and between the adjacent laminated units adjacent to the innermost laminated unit and the adjacent laminated unit positioned outside the innermost laminated unit, the interlayer combination between at least two adjacent laminated units is completed through the short fibers of the net layer of the laminated unit of the inner layer.
7. The profiling preform for an antenna cover plate according to any one of claims 2 to 6, wherein at least one layer of thickening sheet is arranged between two adjacent laying layers at the vertex of the cover body, and the thickening sheet is made of fiber cloth and/or a mesh tire.
8. The profiling preform for antenna cover plates according to claim 2, wherein the stitching lines penetrating the adjacent laminated units are single-thread lead lines which continuously penetrate the stitching layer and are respectively located at both sides of the stitching layer.
9. The profiling preform for an antenna cover plate according to any one of claims 1 to 6, wherein all the laminated units are connected by stitching through a stitching line;
The sewing thread comprises a sewing bottom thread and a sewing upper thread, the sewing bottom thread is positioned on the inner surface of the laminated unit at the innermost layer, and the sewing upper thread passes through the thickness direction of all the laminated units and is interwoven with the sewing bottom thread to and fro and then finishes the movement of the needle pitch on the outer surface of the laminated unit at the outermost layer.
10. An antenna cover plate is characterized in that a wave-transmitting resin material is embedded into the interior and the surface of a prefabricated member through a vacuum filling process and is fused into a whole and is solidified and molded; the fabricated member is the antenna cover plate profiling fabricated member as claimed in any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910844609.XA CN110549644A (en) | 2019-09-06 | 2019-09-06 | Antenna cover plate and profiling prefabricated member thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113045300A (en) * | 2021-03-19 | 2021-06-29 | 中建材飞渡航天科技有限公司 | Preparation method of laminated fiber fabric reinforced composite material radome |
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