CN104767035A - High-precision carbon fiber auxiliary reflection face forming method - Google Patents
High-precision carbon fiber auxiliary reflection face forming method Download PDFInfo
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- CN104767035A CN104767035A CN201510187611.6A CN201510187611A CN104767035A CN 104767035 A CN104767035 A CN 104767035A CN 201510187611 A CN201510187611 A CN 201510187611A CN 104767035 A CN104767035 A CN 104767035A
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Abstract
The invention provides a high-precision carbon fiber auxiliary reflection face forming method. The method includes the steps of establishing curved surface mathematic models of front skin, middle skin and rear skin through design software, designing a front die, a middle die and a rear die according to all the mathematic models, manufacturing the front skin with a metal reflection face on the front die, manufacturing the middle skin on the middle skin die with carbon fiber pre-soaked materials as raw materials, manufacturing the rear skin on the rear die with carbon fiber pre-soaked materials as raw materials, conducting co-curing processing on the front skin, the middle skin and the rear skin to form an integrated auxiliary reflection face, conducting foaming in a cavity of the auxiliary reflection face through foam, sealing the cavity through a carbon fiber sealing plate after flat repairing the foam, and manufacturing the high-precision carbon fiber auxiliary reflection face. The carbon fiber composite materials serve as the skin, and therefore the forming method has the advantages of being resistant to acid, salt mist and seawater and the like, and the obtained high-precision auxiliary reflection face is suitable for damp environments of coasts, ships and the like.
Description
Technical field
The invention belongs to and be operated in Ka frequency range and with super band Reflector Panel field, particularly a kind of high-precision carbon fiber subreflector forming method.
Background technology
Along with communication, observing and controlling, the developing rapidly of radio astronomy technology, working frequency range is more and more higher, the demand of big-and-middle-sized antenna is more and more extensive, not only have higher requirement to the precision of antenna main reflector, the antenna subreflector as one of dual reflector antenna important component part has also welcome larger challenge.
So far domestic and international to high-precision definition be still antenna profile degree mean square deviation (r.m.s.)≤λ/100, cm wave antenna profile tolerance mean square deviation require be 10
-1magnitude, mm wave antenna mean square deviation should be 10
-2magnitude.And the ratio of precision antenna main reflector required precision of antenna subreflector is higher, be generally 1/3 of primary reflection surface mean square deviation (r.m.s.), all needing according to purposes to high accuracy, superhigh precision development both at home and abroad.
High accuracy subreflector traditional diamond-making technique is all obtained, within precision generally can arrive 0.1mm (r.m.s.) by digital control processing cast aluminium or aluminium bar etc.; Also there is report, after strengthening the rigidity of subreflector, 0.05mm (r.m.s.) can be worked into, but will through repeatedly annealing and centering benchmark digital control processing again.
Mainly have the following disadvantages in prior art:
1, traditional numeric-control processing technology will expect that high accuracy subreflector must increase the rigidity of minor face, subreflector weight will certainly be increased, also will strengthen simultaneously and support subreflector structure, the product for the weight demands harshness such as airborne, spaceborne cannot satisfy the demands;
2, the subreflector obtained with intermetallic composite coating need strengthen the protection to product when applying under the wet environments such as coastal, boats and ships, to ensure useful life;
3, when the area application that the circumstance of temperature difference such as polar region are very large, it is poor that Metallic Pairs reflecting surface protects precision capability, because thermal expansion metal coefficient is large, deformation can occur with circumstance of temperature difference change, cause precision unstable, permanent distortion even occurs and causes afunction.
Summary of the invention
The object of the invention is to avoid the weak point in above-mentioned background technology and a kind of high-precision carbon fiber subreflector forming method is provided, with produce have lightweight, precision is high, the large feature of rigidity, and is specially adapted to the subreflector of big-and-middle-sized antenna.
The present invention includes step:
Provide a kind of high-precision carbon fiber subreflector forming method, it comprises the following steps:
S1. front Skinning Surfaces Mathematical Modeling, middle Skinning Surfaces Mathematical Modeling, rear Skinning Surfaces Mathematical Modeling is set up;
S2. mould is made according to curved surface Mathematical Modeling;
S3. covering is prepared:
1. metallic reflector is made: adopt Transmetallation on mould, to apply release agent and reflector, spray metal;
2. covering before preparation: the spread semi finished size determining front covering according to front Skinning Surfaces Mathematical Modeling, the stand-by carbon fiber material of polylith is cut out according to this size, according to quasi-isotropic laying principle, multilayer carbon fiber material paving is overlayed on metallic reflector, carbon fiber and metallic reflector are transferred on mould and carry out co-curing process to make front covering;
3. covering in preparation: the spread semi finished size determining middle covering according to middle Skinning Surfaces Mathematical Modeling, cut out the stand-by carbon fiber material of polylith according to this size, according to quasi-isotropic laying principle multilayer carbon fiber material paving overlayed on mould and be cured process to make middle covering;
4. covering after preparation: the spread semi finished size determining rear covering according to rear Skinning Surfaces Mathematical Modeling, cut out the stand-by carbon fiber material of polylith according to this size, according to quasi-isotropic laying principle multilayer carbon fiber material paving overlayed on mould and be cured process to make rear covering;
S4. subreflector is prepared: front covering, middle covering, rear covering are adjusted to outer rim and flush to be stacked and be layed on mould, upper core is plugged between front covering and middle covering, between middle covering and rear covering, plug lower core, each separation assembly is carried out bonding solidification, to make subreflector;
S5. high accuracy subreflector is prepared: filled and process in the cavity of described subreflector also solidifies, by sealing-in carbon fiber shrouding after foam equating, to make high accuracy subreflector.
Further, the detailed process of described step S1 is, covering Mathematical Modeling before setting up, carries out normal direction translation to obtain middle Skinning Surfaces Mathematical Modeling, middle covering die curved surface Mathematical Modeling is carried out normal direction translation with the rear Skinning Surfaces Mathematical Modeling obtained by front covering Mathematical Modeling.
Further, the distance of described normal direction translation is equal with sandwich thickness.
Further, the detailed process of described step S2 is, according to front Skinning Surfaces Mathematical Modeling to make front covering die, to make, there is covering die in middle Skinning Surfaces according to middle Skinning Surfaces Mathematical Modeling, make the rear covering die with rear Skinning Surfaces according to rear Skinning Surfaces curved surface Mathematical Modeling.
Further, described being cured as uses autoclave or baking oven to carry out bonding solidification.
Further, described mould has the adsorption hole that at least one runs through, together with vacuum pump, covering can be adsorbed.
Further, also comprise in step s 5, filled and process has the vertical channel that at least one is the end with the upper surface of middle covering, in each vertical channel, be inserted with the interface embedded part mutually gluing with middle covering upper surface.
Further, described lower core and the material of upper core can be aluminium honeycomb, aramid paper honeycomb, cork wood, foam.
Further, the material of described metallized reflective layer can be zinc, aluminium or copper, and thickness is at 80-200 μm.
The present invention compared with prior art tool has the following advantages:
Present invention employs carbon fibre composite as covering, adopt double-layer sandwich, and be integrated gluing for each separation assembly by adhesive, support for shaping high accuracy subreflector provides rigidity, and weight ratio conventional metals wants light a lot, carbon fibre composite covering density is 56% of aluminium alloy, the density of sandwich is only aluminium alloy 1.5%-3%, manufacture of the present invention forms that subreflector precision is high, lightweight, rigidity is high, antifatigue is slightly good, both meet self functional requirement, alleviate again the burden supporting subreflector structure;
The present invention adopts carbon fibre composite as covering, and it has acidproof, the advantage such as salt spray resistance, sea water resistance, and the high accuracy subreflector obtained is applicable to being applied in the wet environments such as coastal, carrier-borne;
The present invention adopts foam-filled cavity, and with the sealing of carbon fiber shrouding, forms waterproof construction, and improve subreflector rigidity.
The present invention adopts carbon fibre composite, and its thermal coefficient of expansion is low, the high accuracy subreflector Heat stability is good obtained, and protect precision capability than Metallic Pairs reflecting surface strong, environmental suitability, can be applicable to the area that the circumstance of temperature difference such as polar region are very large;
The present invention adopts transfer method to obtain metal mirror, can obtain the reflection efficiency the same with metal, can not be subject to the impact that carbon fibre composite resistance is large.
The present invention is compared with traditional metal crafts, operation easier is low, common paving is covered work and can be completed, and traditional numeric-control processing needs senior skilled worker just can complete, suitable also with metal of cost, material is easy to get, and environment is easy to realize, there is very high engineer applied be worth, and good Social benefit and economic benefit.
Accompanying drawing explanation
Fig. 1 is sectional structure schematic diagram of the present invention;
Fig. 2 is subreflector explosive view;
Fig. 3 be before, during and after the present invention Skinning Surfaces Mathematical Modeling set up position view;
Fig. 4 is R place enlarged drawing in Fig. 3;
In accompanying drawing: front Skinning Surfaces Mathematical Modeling-a, middle Skinning Surfaces Mathematical Modeling-b, rear Skinning Surfaces Mathematical Modeling-c, metallic reflector-1-1, front covering carbon fiber paving coating-1-2, middle covering 2, rear covering-3, upper core-4-2, lower core 4-1, sandwich thickness-d;
Embodiment
As shown in Figure 1, the present invention includes the front covering 1 being stacked laying successively, middle covering 2, rear covering 3, described front covering 1 comprises the metallic reflector 1-1 and front covering carbon fiber paving coating 1-2 that are combined with each other, described front covering carbon fiber paving coating 1-2 paving overlays on the upper surface of metallic reflector 1-1, described front covering carbon fiber paving coating 1-2, middle covering 2 and rear covering 3 are all made up of carbon fiber material, lower core 4-1 is folded with between front covering 1 and middle covering 2, upper core 4-2 is folded with between middle covering 2 and upper covering 3, described front covering 1, lower core 4-1, middle covering 2, upper core 4-2, rear covering 3 phase composite curing is into a single integrated structure, its integrative-structure becomes to have the disc of cavity, foam is filled with in the cavity of rear covering 3, the profile of foam matches with the recess shape of rear covering 3, the enlarging face of foam and the opening of rear covering 3 are along flushing, described foam has the vertical channel that 3 is the end with the upper surface of middle covering 2, the interface embedded part mutually gluing with middle covering 2 upper surface is inserted with in each vertical channel, have carbon fiber shrouding (5) in the opening part envelope of rear covering, carbon fiber shrouding (5) glueds joint mutually with foam enlarging face.
What described carbon fiber material was concrete is carbon fiber prepreg.
Described upper core 4-2 and the material of lower core 4-1 can be aluminium honeycomb, aramid paper honeycomb, cork wood, foam;
With reference to accompanying drawing, manufacturing process of the present invention comprises the following steps:
(1) founding mathematical models: Skinning Surfaces Mathematical Modeling a before using design software to set up, digital control processing is carried out according to this Mathematical Modeling, covering die before the present embodiment adopts cast iron materials to make, cast iron material surface becomes high-precision profile through digital control processing, to make front covering die.
(2) mould is made according to Mathematical Modeling: front Skinning Surfaces Mathematical Modeling is carried out the translation of method phase to obtain middle Skinning Surfaces Mathematical Modeling b, adopt fiberglass hand to stick with paste technique according to middle Skinning Surfaces Mathematical Modeling and turn over covering die in system, obtain rear Skinning Surfaces Mathematical Modeling c after middle Skinning Surfaces Mathematical Modeling is carried out the translation of method phase, adopt fiberglass hand to stick with paste the rear covering die of the technique system of turning over according to rear Skinning Surfaces Mathematical Modeling.
(3) metallic reflector is made: for aluminium-plated method for metallising, front covering die first sprays release agent spray metal again, to obtain metallic reflector 1-1, metal material can be zinc, aluminium or copper, and thickness is at 80-200 μm.
(4) covering before making: cover thick layer glued membrane on metallic reflector upper berth, covering spread material Mathematical Modeling before setting up according to front Skinning Surfaces Mathematical Modeling a, the stand-by carbon fiber material of polylith is made according to this model, according to paving coating number, angle, the blank size of quasi-isotropic laying principle determination carbon fiber material, with 0 °/± 45 °/90 °, carbon fiber prepreg paving is overlayed on glued membrane, covering 1 before metallic reflector, thick glued membrane, carbon fiber co-curing form after having covered by paving.
(5) covering in making: covering spread material Mathematical Modeling in setting up according to middle Skinning Surfaces Mathematical Modeling b, the stand-by carbon fiber material of polylith is made according to this model, according to paving coating number, angle, the blank size of quasi-isotropic laying principle determination carbon fibre material, with 0 °/90 °, carbon fiber material paving is covered middle covering die and obtain middle covering by autoclave forming process by carbon-fiber-reinforced for each layer.
(6) covering after making: covering spread material Mathematical Modeling after setting up according to rear Skinning Surfaces c, the stand-by carbon fiber material of polylith is made according to this model, determine paving coating number, angle, blank size according to quasi-isotropic laying principle, with 90 °/± 45 °/0 ° carbon fiber material paving overlayed on rear covering die and obtain rear covering by autoclave forming process by carbon-fiber-reinforced for each layer.
(7) subreflector is made: by front covering 1, middle covering 2, rear covering 3, be adjusted to outer rim and flush to be stacked and be layed on front covering die, between front covering 1 and middle covering 2, plug lower core 4-1, between middle covering 2 and rear covering 3, plug upper core 4-2, by adhesive, the separation assemblies such as front covering, upper core 4-2, middle covering, lower core 4-1, rear covering are made subreflector by negative pressure of vacuum through autoclave or bonding being solidified togather of baking oven.
(8) high accuracy subreflector is made: filled and process in the cavity of subreflector also foams, and heat Post RDBMS, filled and process is formed after equating, filled and process has the vertical channel that 3 is the end with the upper surface of middle covering 2, the interface embedded part mutually gluing with middle covering 2 upper surface is inserted with in each vertical channel, carbon fiber shrouding is adhesive on foam the most at last, obtains high accuracy subreflector.
Described mould has 4 adsorption holes run through, together with vacuum pump, covering can be adsorbed.
Claims (9)
1. a high-precision carbon fiber subreflector forming method, it comprises the following steps:
S1, front Skinning Surfaces Mathematical Modeling (a) of foundation, middle Skinning Surfaces Mathematical Modeling (b), rear Skinning Surfaces Mathematical Modeling (c);
S2, according to curved surface Mathematical Modeling make mould;
S3, prepare covering:
1. metallic reflector is made: adopt Transmetallation on mould, to apply release agent and reflector, spray metal (1-1);
2. covering (1) before preparation: the spread semi finished size determining front covering (1) according to front Skinning Surfaces Mathematical Modeling (a), the stand-by carbon fiber material of polylith is cut out according to this size, according to quasi-isotropic laying principle, multilayer carbon fiber material paving is overlayed on metallic reflector (1-1), carbon fiber and metallic reflector are transferred on mould and carry out co-curing process to make front covering (1);
3. covering (2) in preparation: the spread semi finished size determining middle covering (2) according to middle Skinning Surfaces Mathematical Modeling (b), cut out the stand-by carbon fiber material of polylith according to this size, according to quasi-isotropic laying principle multilayer carbon fiber material paving overlayed on mould and be cured process to make middle covering (2);
4. covering (3) after preparation: the spread semi finished size determining rear covering (3) according to rear Skinning Surfaces Mathematical Modeling (c), cut out the stand-by carbon fiber material of polylith according to this size, according to quasi-isotropic laying principle multilayer carbon fiber material paving overlayed on mould and be cured process to make rear covering (3);
S4, prepare subreflector: front covering (1), middle covering 2, rear covering (3) are adjusted to outer rim and flush to be stacked and be layed on mould, upper core (4-2) is plugged between front covering (1) and middle covering (2), lower core (4-1) is plugged between middle covering (2) and rear covering (3), each separation assembly is carried out bonding solidification, to make subreflector;
S5, preparation high accuracy subreflector: filled and process in the cavity of described subreflector also solidifies, by sealing-in carbon fiber shrouding (5) after foam equating, to make high accuracy subreflector.
2. a kind of high-precision carbon fiber subreflector forming method according to claim 1, it is characterized in that: the detailed process of described step S1 is, covering Mathematical Modeling (a) before setting up, front covering Mathematical Modeling (a) is carried out normal direction translation to obtain middle Skinning Surfaces Mathematical Modeling (b), middle covering die curved surface Mathematical Modeling (b) is carried out normal direction translation with rear Skinning Surfaces Mathematical Modeling (c) obtained.
3. a kind of high-precision carbon fiber subreflector forming method according to claim 2, is characterized in that: the distance of described normal direction translation is equal with sandwich thickness (d).
4. a kind of high-precision carbon fiber subreflector forming method according to claim 1, it is characterized in that: the detailed process of described step S2 is, according to front Skinning Surfaces Mathematical Modeling (a) to make front covering die, to make, there is covering die in middle Skinning Surfaces according to middle Skinning Surfaces Mathematical Modeling (b), there is according to the making of rear Skinning Surfaces curved surface Mathematical Modeling (c) the rear covering die of rear Skinning Surfaces.
5. a kind of high-precision carbon fiber subreflector forming method according to claim 1, is characterized in that: described being cured as uses autoclave or baking oven to carry out bonding solidification.
6. a kind of high-precision carbon fiber subreflector forming method according to claim 1, is characterized in that: on described mould, have the adsorption hole that at least one runs through, can be adsorbed by covering together with vacuum pump.
7. a kind of high-precision carbon fiber subreflector forming method according to claim 1, it is characterized in that: also comprise in step s 5, filled and process having at least one with the upper surface of middle covering (2) is the vertical channel at the end, is inserted with the interface embedded part mutually gluing with middle covering (2) upper surface in each vertical channel.
8. a kind of high-precision carbon fiber subreflector forming method according to claim 1, is characterized in that: described lower core (4-1) and the material of upper core (4-2) can be aluminium honeycomb, aramid paper honeycomb, cork wood, foam.
9. a kind of high-precision carbon fiber subreflector forming method according to claim 1, is characterized in that: the material of described metallized reflective layer (1-1) can be zinc, aluminium or copper, and thickness is at 80-200 μm.
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Cited By (8)
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| CN105552567A (en) * | 2015-12-09 | 2016-05-04 | 上海复合材料科技有限公司 | Antenna reflection plane and preparation method therefor |
| CN106887712A (en) * | 2017-04-27 | 2017-06-23 | 中国电子科技集团公司第五十四研究所 | A kind of manufacture method of high-precision carbon fiber ring-focus antenna subreflector |
| CN108216375A (en) * | 2016-12-21 | 2018-06-29 | 郑州宇通客车股份有限公司 | A kind of car and its side wall structure of passenger car |
| CN108756140A (en) * | 2018-06-02 | 2018-11-06 | 浙江创通木业有限公司 | A kind of compoiste wood floor of honeycomb and preparation method thereof |
| CN109687159A (en) * | 2018-12-27 | 2019-04-26 | 上海复合材料科技有限公司 | Ultralight high-precision rapid shaping antenna reflective face and preparation method thereof |
| CN111509399A (en) * | 2020-04-29 | 2020-08-07 | 中国电子科技集团公司第五十四研究所 | Method for manufacturing integral large-area subreflector |
| CN111864403A (en) * | 2020-06-30 | 2020-10-30 | 上海复合材料科技有限公司 | High-precision reflecting surface forming method |
| CN114179396A (en) * | 2021-12-17 | 2022-03-15 | 江西洪都航空工业集团有限责任公司 | Forming method and die suitable for irregular U-shaped composite material foam sandwich structural member |
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| CN109687159A (en) * | 2018-12-27 | 2019-04-26 | 上海复合材料科技有限公司 | Ultralight high-precision rapid shaping antenna reflective face and preparation method thereof |
| CN111509399A (en) * | 2020-04-29 | 2020-08-07 | 中国电子科技集团公司第五十四研究所 | Method for manufacturing integral large-area subreflector |
| 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 |
| CN111864403A (en) * | 2020-06-30 | 2020-10-30 | 上海复合材料科技有限公司 | High-precision reflecting surface forming method |
| CN114179396A (en) * | 2021-12-17 | 2022-03-15 | 江西洪都航空工业集团有限责任公司 | Forming method and die suitable for irregular U-shaped composite material foam sandwich structural member |
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Effective date of registration: 20220812 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. |