CN106887712B - A kind of manufacturing method of high-precision carbon fiber ring-focus antenna subreflector - Google Patents
A kind of manufacturing method of high-precision carbon fiber ring-focus antenna subreflector Download PDFInfo
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- CN106887712B CN106887712B CN201710286373.3A CN201710286373A CN106887712B CN 106887712 B CN106887712 B CN 106887712B CN 201710286373 A CN201710286373 A CN 201710286373A CN 106887712 B CN106887712 B CN 106887712B
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- subreflector
- carbon fiber
- prepreg
- sandwich
- spur
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q15/00—Devices for reflection, refraction, diffraction or polarisation of waves radiated from an antenna, e.g. quasi-optical devices
- H01Q15/14—Reflecting surfaces; Equivalent structures
- H01Q15/141—Apparatus or processes specially adapted for manufacturing reflecting surfaces
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q15/00—Devices for reflection, refraction, diffraction or polarisation of waves radiated from an antenna, e.g. quasi-optical devices
- H01Q15/14—Reflecting surfaces; Equivalent structures
- H01Q15/16—Reflecting surfaces; Equivalent structures curved in two dimensions, e.g. paraboloidal
Abstract
The invention discloses a kind of manufacturing methods of high-precision carbon fiber ring-focus antenna subreflector, what is involved is radar antenna manufacturing engineering fields, exterior skin, upper covering, metal embedded part and the sandwich material preparation among exterior skin and upper covering are integrated by multiple steps, spinning process is especially coated with using novel during preparing spur, reduction production significantly is time-consuming, improves product quality.The present invention uses integral molding techniques, and dexterously quotes foam sandwich construction, and simplification of flowsheet produces high-precision carbon fiber ring-focus antenna subreflector, and precision meets design requirement, and electric performance test works well.Batch micro operations especially suitable for ring-focus antenna subreflector on the mobile vehicles such as vehicle-mounted, boat-carrying.
Description
Technical field
The present invention relates to the manufacturing methods of one of communications field high-precision carbon fiber ring-focus antenna subreflector.Especially
Batch micro operations suitable for ring-focus antenna subreflector on the mobile vehicles such as vehicle-mounted, boat-carrying.
Background technique
Influence of the precision of antenna subreflector for antenna gain and efficiency is huge, with subreflector surface accuracy
It reduces, antenna gain and efficiency can also reduce.Therefore, the rigidity and precision for improving subreflector are in the design of antenna subreflector
It is extremely important.With subreflector weight increase, so as to cause deformation induced by gravity also will increase, how to improve precision and just
Degree, reducing deformation induced by gravity is that we will solve the problems, such as.
Traditional ring coke subreflector production craft step is more, and structure is cast aluminium alloy structure, corrodes in order to prevent, makes
It also needs to foam after the completion of making and it is filled, because the coefficient of expansion of aluminium alloy is larger, when temperature range changes greatly, easily
It is deformed, causes precision unstable.
The subreflector that carbon dimension composite material is made, can generally use carbon fiber sandwich structure or covering+reinforcement
Muscle structure type, honeycomb core are most common sandwich structure cores, and generally there are commonly aluminum honeycombs and aramid fiber paper honeycomb.Aluminum honeycomb
It is made of aluminium foil, good rigidity, shear resistance is high, but aluminum honeycomb differs two quantity with carbon fibre composite thermal expansion coefficient
Grade, when molding, are also easy to produce biggish stress, and aramid paper cellular densities are small, have higher compressive strength and shear strength, with carbon fiber
Easily coordinate when dimension assembling, but it is larger for ring coke subreflector Curvature varying as described herein, it is not easy to form, and if making
It also needs in advance to solidify it with aramid fiber paper honeycomb, forming step is complicated.
The key point and difficult point of carbon fiber ring-focus antenna subreflector forming technique are the moldings of spur, first, it forms convex
The mold of point is not easy to process, and second, when forming spur, if pressure is not delivered to position, easily forms lobe portion and mold void is pasted
Situation, third, after molding, if undue force or operation are incorrect, when demoulding spur easy to damage.
Summary of the invention
The shortcomings that it is an object of the invention to overcome above-mentioned traditional subreflector to process and difficult point, it is multiple to provide a kind of carbon fiber
Covering on condensation material exterior skin, carbon fibre composite fills the system of the integrally formed ring-focus antenna subreflector of sandwich material
Make method.The simplification of the subreflector technological process of production is realized through the invention, and the present invention also has precision height, rigidity big, strong
The advantages that degree is big, deformation is small, shock resistance is good, processing technology is simple, suitable for mass production.
The technical solution used in the present invention are as follows:
A kind of manufacturing method of high-precision carbon fiber ring-focus antenna subreflector is provided, including following steps:
S1. it prepares mold: establishing the mathematical model of mold, mold is prepared according to the mathematical model of mold,
S2. it establishes the mathematical model of subreflector: according to the mathematical model of mold, establishing the mathematics of required subreflector
The mathematical model of model, subreflector is made of lobe portion and main part；
S3. it prepares sandwich: establishing the mathematical model of sandwich material, sandwich is prepared according to the mathematical model of sandwich material；
S4. prepare metal layer: spraying metal materials prepare metal layer in the mold obtained in S1；
S5. subreflector spur is prepared:
1. measuring the exterior surface dimension of sandwich part in S2, corresponding circular outer layer prepreg is prepared according to the size；
2. the residual volume of spur is measured according to the packing volume of the shared lobe portion of outer layer prepreg, according to spur
The circular internal layer prepreg that residual volume preparation multilayer diameter successively decreases；
3. outer layer prepreg and each internal layer prepreg are successively placed in mold according to the modes of emplacement of diameter from large to small
It is interior, guarantee multilayer prepreg with one heart and is compacted using tooling to prepare subreflector spur；
S6. mould assembly: being laid with exterior skin in mold, and sandwich, which is placed in adjustment sandwich bottom plane in exterior skin, makes itself and pair
The upper surface of reflecting surface spur is connected to each other；
S7. it forms: the material that mould assembly in S6 finishes being placed in autoclave and is formed.
Further, the specific steps 3. walked in the S5 are as follows: will be outer according to the arrangement mode of diameter from small to large
Layer prepreg and multilayer internal layer prepreg are arranged successively up and down, one layer of glue film are laid between every three layers of prepreg, and according to by big
It will be successively laid in the outer layer prepreg for finishing glue film and internal layer prepreg merging mold to small modes of emplacement, guarantee that multilayer is pre-
Leaching material is concentric and is compacted using tooling to prepare subreflector spur.
Further, in S6 step, be laid with exterior skin the specific steps are be located at convex outside the metal layer obtained in S3
Sharp top is coated with carbon fiber prepreg, and the center of carbon fiber prepreg forms circular open, the circle in carbon fiber prepreg center
It is open and is mutually overlapped with the outer rim of subreflector spur.
Further, after the circular open in adjustment carbon fiber prepreg center and the outer rim of subreflector spur mutually overlap,
Start embedded built-in fitting in the upper face center of sandwich, is laid with after built-in fitting is embedded in the upper surface of sandwich and is used as upper covering
Carbon fiber prepreg, exterior skin, sandwich and upper covering are adjusted to outer rim and are flushed when upper covering is coated with to finish.
Further, the edge of obtained exterior skin is equipped with the flange of bending.
Further, the lower surface of the inner surface of the exterior skin and upper covering is all equipped with adhesive glue film.
Further, the sandwich in the S3 step is divided into pintongs, is all equipped with adhesive glue film between each valve.
Further, release agent coating aluminum again is first sprayed on the inner surface of mold in the S4 step, with
To metal layer；
It has the advantages that compared with the background technology, the present invention
1. using carbon fiber foam cored structure, the selection for remaining subreflector sandwich material provides reference；
2. the application of integral molding techniques, subreflector material selection carbon fiber foam sandwich construction is compared with metal subreflector
Loss of weight >=64.9%, compared with carbon fiber prepreg (covering+reinforcing rib) subreflector loss of weight >=41.3%, to can reach to secondary anti-
Face support is penetrated, motor etc. carries out light-weighted related design, reduces cost；
3. the application of integral molding techniques reduces the accumulated error that part is generated in assembly.
4. use integral molding techniques for carbon fiber ring-focus antenna subreflector, the mold for forming spur is not easy to add
Work；If pressure is not delivered to position, easily forms lobe portion and mold void pastes situation；After molding, if undue force or operation are not just
Really, when demoulding the problems such as spur easy to damage, by the implementation of this technology, problem above is overcome, the carbon fiber ring developed is burnt
Antenna subreflector type face precision is better than 0.05mm (r.m.s), meets design requirement, electric performance test works well.
5. the present invention uses carbon fibre composite, thermal expansion coefficient is low, and obtained high-precision carbon fiber ring is burnt secondary
Reflecting surface thermal stability is good, and in the circumstance of temperature difference such as polar region greatly area, it is strong to protect precision capability than metal mirror.
6. the reflection efficiency as metal, Bu Huishou can be obtained in the metal mirror that the present invention is obtained using transfer method
The big influence of carbon fibre composite resistance.
7. the present invention simplifies forming step, reduces the production cost compared with traditional fabrication ring-focus antenna subreflector.
Detailed description of the invention
Fig. 1 is explosive view of the present invention
Fig. 2 is schematic cross-sectional view of the present invention；
Specific embodiment
The invention will be further described below combined with Figure 1 and Figure 2,.
A kind of high-precision carbon fiber ring-focus antenna subreflector, including spur 1 are provided, exterior skin 2, sandwich 3, metal is pre-
Embedded part 4, upper covering 5, the spur 1 are compound by the circular interior carbon fiber prepreg that metallic reflector and multilayer diameter successively decrease
Bullet is formed together.The exterior skin 2 includes the metallic reflector and exterior skin carbon fiber prepreg being combined with each other
It is coated with layer, is located above spur in exterior skin and is equipped with sandwich material 3, sandwich material is foam, and the upper covering 5 is covered on
3 top of sandwich material, upper covering are that carbon fiber prepreg is coated with layer, and the bottom surface of sandwich is plane, and the top surface of the spur is rigid
It can be docked at the cone for forming that outer wall is arc at the bottom surface of sandwich well.
The spur 1, exterior skin 2, sandwich 3, metal embedded part 4, upper covering 5 carry out gap filling by glue film, adopt
It is an integral molding structure with heat pressing process production.
It is described further below according to manufacture craft of the attached drawing to invention:
Specific step is as follows for the production of the high-precision carbon fiber ring-focus antenna subreflector:
Step 1: establishing the curved surface mathematical model of ring coke subreflector, the burnt secondary reflection of ring is processed according to Design of Mathematical Model
The mathematical model of face molding die, subreflector is made of lobe portion and main part: making mold, mould using cast iron materials
Tool is cavity plate, and type face becomes ring coke subreflector mold through numerical control processing, and the mold is separate structure, easy to form and de-
Mould, the mold include embedded part positioning tool, are easy to the positioning of metal embedded part 4；
Step 2: production metallic reflector: release agent coating aluminum again is first sprayed on ring coke subreflector mold, with
Metal layer is obtained, before coating aluminum, guarantees that mold vertex remover is cleaned out；
Step 3: preparing subreflector spur: 1. measuring the exterior surface dimension of spur by software, prepared according to the size
The isometric corresponding circular outer layer prepreg of one layer or multilayer；2. according to filling out for the shared lobe portion of outer layer prepreg
The residual volume for filling cubing spur prepares the circular internal layer that multilayer diameter successively decreases according to the residual volume of spur and presoaks
Material；3. outer layer prepreg and multilayer internal layer prepreg are arranged successively up and down according to the arrangement mode of diameter from small to large, every three/
One layer of glue film is laid between four layers of prepreg, and according to the modes of emplacement of diameter from large to small successively by outer layer prepreg and internal layer
Prepreg is placed in the metal layer of mold, guarantees that multilayer prepreg is concentric, and press at the spur preparation of mold using tooling
In fact to prepare subreflector spur；
Step 4: being coated with exterior skin: the present invention is used 4 layers of carbon fiber prepreg, each layer with overlapping mode by 0 °,
22.5 °, 45 °, 67.5 ° of direction successively pavings are located above spur outside the metal layer obtained in S3 and are coated with carbon fiber prepreg,
The center of carbon fiber prepreg forms circular open, the circular open in carbon fiber prepreg center and the outer rim of subreflector spur
Mutually overlap；
Exist step 5: being coated with thickening: when being coated with thickening at the outer of exterior skin, the material for thickening side is carbon fibre initial rinse
Material carries out blanking by the height for thickening side and is coated with to form exterior skin flange；
Step 6: being coated with sandwich material: the mathematical model of sandwich material is established, sandwich material passes through numerical control machine-shaping,
It is coated with one layer of glue film on the inner surface of exterior skin, adjusts the circular open and the outer rim phase of subreflector spur in exterior skin center
After overlap joint, starts embedded built-in fitting in the upper face center of sandwich, be laid with and make in the upper surface of sandwich after built-in fitting is embedded
For the carbon fiber prepreg of upper covering, exterior skin, sandwich and upper covering are adjusted to outer rim and flushed when upper covering is coated with to finish；
Step 7: metal embedded part positions: using tool locating metal embedded part；
Step 8: being coated with covering: being coated with one layer of glue film on sandwich material, 4 layers of metal embedded part are coated on glue film and are added
Gu 3 layers of carbon fiber prepreg are then pressed 60 °, 30 °, 0 ° of direction successively paving, covering in formation with overlapping mode by layer.
Step 9: the subreflector component that preparation is finished, is sent into autoclave, is consolidated by solidification of hot-press tank technique
Change.
Claims (8)
1. a kind of manufacturing method of high-precision carbon fiber ring-focus antenna subreflector, it is characterised in that:
S1. it prepares mold: establishing the mathematical model of mold, mold is prepared according to the mathematical model of mold；
S2. it establishes the mathematical model of subreflector: according to the mathematical model of mold, establishing the mathematical modulo of required subreflector
The mathematical model of type, subreflector is made of lobe portion and main part；
S3. it prepares sandwich: establishing the mathematical model of sandwich material, sandwich is prepared according to the mathematical model of sandwich material；
S4. prepare metal layer: spraying metal materials prepare metal layer in the mold obtained in S1；
S5. subreflector spur is prepared:
The exterior surface dimension for measuring lobe portion in S2, prepares corresponding circular outer layer prepreg according to the size；
1. the residual volume of spur is measured according to the packing volume of the shared lobe portion of outer layer prepreg, according to the residue of spur
The circular internal layer prepreg that volume preparation multilayer diameter successively decreases；
2. being protected according to the modes of emplacement of diameter from large to small successively by outer layer prepreg and each internal layer prepreg merging mold
Card multilayer prepreg is concentric and is compacted using tooling to prepare subreflector spur；
S6. mould assembly: being laid with exterior skin in mold, and sandwich, which is placed in adjustment sandwich bottom plane in exterior skin, to be made it and secondary reflect
The upper surface of face spur is connected to each other；
S7. it forms: the material that mould assembly in S6 finishes being placed in autoclave and is formed.
2. a kind of manufacturing method of high-precision carbon fiber ring-focus antenna subreflector according to claim 1, feature exist
In the specific steps 2. walked in the S5 are as follows: according to diameter arrangement mode from small to large by outer layer prepreg and multilayer
Internal layer prepreg is arranged successively up and down, one layer of glue film is laid between every three layers of prepreg, and according to modes of emplacement from large to small
It will successively be laid in the outer layer prepreg for finishing glue film and internal layer prepreg merging mold, guarantee multilayer prepreg with one heart and use
Tooling is compacted to prepare subreflector spur.
3. a kind of manufacturing method of high-precision carbon fiber ring-focus antenna subreflector according to claim 1, feature exist
In: in S6 step, be laid with exterior skin the specific steps are be located above spur outside the metal layer obtained in S3 and be coated with carbon fiber
Prepreg is tieed up, the center of carbon fiber prepreg forms circular open, the circular open and subreflector in carbon fiber prepreg center
The outer rim of spur mutually overlaps.
4. a kind of manufacturing method of high-precision carbon fiber ring-focus antenna subreflector according to claim 3, feature exist
In: after the circular open in center and the outer rim of subreflector spur for adjusting exterior skin mutually overlap, in the upper face center of sandwich
Start embedded built-in fitting, is laid with the carbon fiber prepreg as upper covering in the upper surface of sandwich after built-in fitting is embedded, when
Upper covering is coated with to finish and exterior skin, sandwich and upper covering is adjusted to outer rim and flushed.
5. a kind of manufacturing method of high-precision carbon fiber ring-focus antenna subreflector according to claim 3, feature exist
In: the edge of obtained exterior skin is equipped with the flange of bending.
6. a kind of manufacturing method of high-precision carbon fiber ring-focus antenna subreflector according to claim 3, feature exist
In: the inner surface of the exterior skin and the lower surface of upper covering are all equipped with adhesive glue film.
7. a kind of manufacturing method of high-precision carbon fiber ring-focus antenna subreflector according to claim 1, feature exist
In: the sandwich in the S3 step is divided into pintongs, is all equipped with adhesive glue film between each valve.
8. a kind of manufacturing method of high-precision carbon fiber ring-focus antenna subreflector according to claim 1, feature exist
In: release agent coating aluminum again is sprayed in the S4 step, first on the inner surface of mold to obtain metal layer.
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| CN201710286373.3A CN106887712B (en) | 2017-04-27 | 2017-04-27 | A kind of manufacturing method of high-precision carbon fiber ring-focus antenna subreflector |
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| CN108987938B (en) * | 2018-07-19 | 2021-07-23 | 华北水利水电大学 | Manufacturing method and device of conformal passive indicator of Longbo electromagnetic lens reflector based on ABS material |
| CN109687160A (en) * | 2018-12-29 | 2019-04-26 | 中国电子科技集团公司第二十研究所 | A kind of monoblock type high-precision carbon fiber composite antenna reflector and its manufacturing method |
| CN111267413B (en) * | 2019-12-31 | 2020-12-18 | 中电科芜湖钻石飞机制造有限公司 | Composite material intelligent skin and manufacturing method thereof |
| CN111509399B (en) * | 2020-04-29 | 2021-06-04 | 中国电子科技集团公司第五十四研究所 | Method for manufacturing integral large-area subreflector |
| CN112688083B (en) * | 2020-12-04 | 2022-06-21 | 江苏新扬新材料股份有限公司 | Manufacturing method of large-size composite sandwich structure multi-interface reflecting plate |
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Effective date of registration: 20220815 Address after: Fifty-fourth No. 589 Zhongshan West Road 050081, Hebei city in Shijiazhuang province the day of. Patentee after: THE 54TH RESEARCH INSTITUTE OF CHINA ELECTRONICS TECHNOLOGY Group Corp. Patentee after: Hebei Zhongdian Huatuo Technology Co., Ltd. Address before: Fifty-fourth No. 589 Zhongshan West Road 050081, Hebei city in Shijiazhuang province the day of. Patentee before: THE 54TH RESEARCH INSTITUTE OF CHINA ELECTRONICS TECHNOLOGY Group Corp. |
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