CN112549580A - Method for forming fiber reinforced resin matrix composite material antenna housing - Google Patents
Method for forming fiber reinforced resin matrix composite material antenna housing Download PDFInfo
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- CN112549580A CN112549580A CN202011275262.0A CN202011275262A CN112549580A CN 112549580 A CN112549580 A CN 112549580A CN 202011275262 A CN202011275262 A CN 202011275262A CN 112549580 A CN112549580 A CN 112549580A
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- resin
- thickness
- fiber
- radome
- pasted
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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
-
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2031/00—Other particular articles
- B29L2031/34—Electrical apparatus, e.g. sparking plugs or parts thereof
- B29L2031/3456—Antennas, e.g. radomes
Abstract
The invention relates to the technical field of antenna housings, in particular to a forming method of a fiber reinforced resin matrix composite material antenna housing.
Description
Technical Field
The invention relates to the technical field of antenna housings, in particular to a method for molding a fiber reinforced resin matrix composite material antenna housing.
Background
With the rapid development of weaponry, the profile design of the key part of the radome is more and more complex, and meanwhile, the requirements on the strength, the weight and other properties of the radome are higher and higher. The fiber reinforced resin matrix composite material has wide application in antenna covers in the fields of aerospace, ground, ships and warships due to the characteristics of light weight, high strength and the like.
The commonly used forming methods of the fiber reinforced resin matrix composite material antenna housing are divided into the following three types: 1. pasting a fiber cloth in the female die to ensure an outer profile, and locally finishing the inner profile after curing; 2. pasting a fiber cloth on the male die to ensure an inner molded surface, and locally finishing an outer molded surface after curing; and 3, using fiber cloth and a female die and a male die together, pasting the fiber cloth on the male die or the female die, then carrying out curing molding after the female die and the male die are assembled, and simultaneously ensuring the inner and outer molded surfaces. However, the above method is only suitable for the radome with a relatively simple profile and a relatively uniform thickness.
For the radome with high pasting difficulty (the volume is small, the structure of the profile is complex and the like) or the radome with the special-shaped structure of the structure such as uneven thickness, large curvature change, deep cavity and the like, the profile is complex, positive and negative curvature conversion, variable thickness, large thickness and negative curvature design exist, great difficulty is brought to the preparation of the radome, and the defects of material shortage of products, particularly corners, uneven densification, large machining difficulty and the like are easily caused, so that the qualified rate of the products is very low.
Disclosure of Invention
Technical problem to be solved
The invention aims to provide a method for forming a fiber reinforced resin matrix composite material radome, which solves the manufacturing problem of radomes with complex profiles and high pasting difficulty and improves the production quality and the qualification rate of products.
(II) technical scheme
In order to achieve the above object, in a first aspect, the present invention provides a method for forming a fiber reinforced resin matrix composite radome,
the method comprises the following steps:
s1, pasting fiber reinforced resin prepreg cloth on the male die;
s2, calculating the residual volume of the pasted fiber reinforced resin prepreg area subtracted from the radome, and calculating the mass of the chopped fiber resin premix to be poured according to the residual volume and the design required density;
s3, uniformly distributing the chopped fiber resin premix on the molded surface of the female die;
s4, closing the die with the female die at the bottom and the male die at the top, compacting and curing;
and S5, demolding to obtain the antenna housing to be prepared.
Preferably, the ratio of the thickness of the fiber reinforced resin prepreg pasted on the male mold to the thickness of the corresponding radome is 0.1 to 0.9.
Further preferably, the ratio of the thickness of the fiber reinforced resin prepreg pasted on the male mold to the thickness of the corresponding radome is 0.5.
Preferably, the minimum value is obtained by subtracting the thickness of the pasted fiber reinforced resin prepreg cloth at the corresponding position from the thickness of each position of the radome, and the ratio of the length of the short fibers in the chopped fiber resin premix to the minimum value is less than 20.
Preferably, the weight ratio of the short fibers in the chopped fiber resin premix is 0.3-0.7.
In a second aspect, the invention provides another method for forming a radome made of fiber reinforced resin matrix composite material,
the method comprises the following steps:
s1, infiltrating the dry fiber cloth with resin to obtain infiltrated resin fiber cloth, and pasting the infiltrated resin fiber cloth on a male die; or
And (3) coating resin after the dry fiber surface is paved on the male die, so that the dry fiber cloth paved on the male die becomes the soaked resin fiber cloth.
S2, calculating the residual volume of the antenna housing minus the pasted impregnated resin fiber cloth area, and calculating the mass of the chopped fiber resin premix to be poured according to the residual volume and the design required density;
s3, uniformly distributing the chopped fiber resin premix on a female die surface;
s4, closing the die with the female die at the bottom and the male die at the top, compacting and curing;
and S5, demolding to obtain the antenna housing to be prepared.
Preferably, the ratio of the thickness of the resin fiber cloth pasted and impregnated on the male mold to the thickness of the corresponding radome is 0.1 to 0.9.
Further preferably, the ratio of the thickness of the fiber reinforced resin prepreg pasted on the male mold to the thickness of the corresponding radome is 0.5.
Preferably, the minimum value is obtained by subtracting the thickness of the pasted impregnated resin fiber cloth at the corresponding position from the thickness of each position of the radome, and the ratio of the length of the short fibers in the chopped fiber resin premix to the minimum value is less than 20.
Preferably, the weight ratio of the short fibers in the chopped fiber resin premix is 0.3-0.7.
(III) advantageous effects
The technical scheme of the invention has the following advantages:
1. the forming method of the fiber reinforced resin matrix composite material radome provided by the invention is suitable for radomes with uniform and regular structures and special-shaped structures with variable thicknesses, has the advantages of the strength of the fiber cloth and the fluidity of the chopped fiber resin premix, and is good in surface quality of the manufactured radome, free of profile processing, high in one-time qualified power, free of repeated repair and capable of avoiding strength reduction caused by fiber damage.
2. Because the chopped fiber resin premix has good fluidity, the material dosage is estimated in advance, and the problem of difficult mold closing can not occur. Simple operation and convenient mass production.
Drawings
The drawings of the present invention are provided for illustrative purposes only, and the proportion and the number of the components in the drawings do not necessarily correspond to those of an actual product.
Fig. 1 is a schematic structural diagram of a fiber reinforced resin matrix composite radome prepared by using a method for molding a fiber reinforced resin matrix composite radome with a special-shaped structure in an embodiment of the invention;
fig. 2 is a schematic half-section view of fig. 1.
In the figure: 1: an antenna cover; 11: pasting a molding area; 12: and pouring and coating the molding area.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, 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 some, but not all, embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.
Example one
The forming method of the fiber reinforced resin matrix composite material radome provided by the embodiment of the invention comprises the following steps:
and S1, pasting the fiber reinforced resin prepreg cloth on the male die. Specifically, a certain number of layers of fiber reinforced resin prepreg are pasted according to the thickness of the radome to be manufactured, the thickness of the pasted fiber reinforced resin prepreg is smaller than that of the radome at the corresponding position, for example, the thickness of one region of the radome is 1.8mm, the thickness of the corresponding pasted fiber reinforced resin prepreg at the position is smaller than 1.8mm, and the thickness of the other region of the radome is 3mm, the thickness of the corresponding pasted fiber reinforced resin prepreg at the position is smaller than 3 mm.
And S2, calculating the residual volume of the pasted fiber reinforced resin prepreg area subtracted from the radome, and calculating the mass of the needed perfusion chopped fiber resin premix according to the residual volume and the design required density.
And S3, pre-mixing and pouring the chopped fiber resin into the female die cavity, and coating the chopped fiber resin on the female die surface as uniformly as possible.
And S4, closing the die of the female die and the male die in a mode that the female die is arranged at the lower part and the male die is arranged at the upper part, compacting, and curing according to the used resin curing process.
In some preferred embodiments, the ratio of the thickness of the fiber reinforced resin prepreg pasted on the male mold to the thickness of the corresponding radome is 0.1 to 0.9, and specifically, the ratio of the thickness of the fiber reinforced resin prepreg pasted on the male mold to the thickness of the corresponding radome may be any ratio of 0.1 to 0.9, for example, 0.3, 0.45, 0.5, 0.7, and the like.
In some preferred embodiments, the minimum value is obtained by calculating the value obtained by subtracting the thickness of the pasted fiber reinforced resin prepreg at each position of the radome from the thickness of the corresponding position of the radome and comparing the values obtained by subtracting the values at each position, and the ratio of the length of the short fibers in the chopped fiber resin premix to the minimum value is less than 20.
In some preferred embodiments, the chopped fiber resin premix has a weight ratio of the chopped fibers of 0.3 to 0.7. Preferably, the weight ratio of the short fibers in the chopped fiber resin premix is 0.4.
In a specific embodiment, as shown in fig. 1 and 2, the radome 1 to be prepared has a maximum thickness of 4.9mm and a thinnest point of 1.3mm, and is prepared by pasting three layers on a male mold by using 0.14mm quartz cloth reinforced cyanate ester prepreg, wherein the thickness of the pasted layer is about 0.42, and the ratio of the thickness of the pasted layer to the thinnest thickness of the radome is 0.3. Calculating the residual volume of the antenna housing minus the pasted fiber reinforced resin prepreg area, calculating the mass of the needed perfusion chopped fiber resin premix according to the residual volume and the design required density to be 32g, weighing 12g of quartz fiber with the length of 8mm and 20g of cyanate ester, and uniformly mixing to form the chopped fiber resin premix. The ratio of the length of the quartz fiber, 8mm, to the minimum thickness of the radome potting area, 0.88mm, is 9.1; the weight ratio of the short fibers in the chopped fiber resin premix is 0.38. And (3) coating the chopped fiber resin premix on the molded surface of the female die, positioning the male die above the female die, closing the female die and the male die, compacting, heating to 180 ℃ for 2h, heating to 200 ℃ for 2h, curing, and demolding to obtain the antenna housing 1 to be prepared, wherein a pasted molding area 11 is a corresponding area of the pasted quartz cloth reinforced cyanate prepreg after molding in fig. 2.
Example two
The second embodiment is basically the same as the first embodiment, and the same parts are not described again, except that: infiltrating the dry fiber cloth with resin to obtain infiltrated resin fiber cloth, and pasting the infiltrated resin fiber cloth on a male die; or spreading the dry fiber surface on the male die and then coating resin to enable the dry fiber cloth spread on the male die to become the soaked resin fiber cloth.
In a specific embodiment, the radome 1 to be prepared has a maximum thickness of 4.9mm and a thinnest portion of 1.4mm, and is prepared by using glass fiber cloth with a thickness of 0.17mm, impregnating the glass fiber cloth with epoxy resin, pasting 6 layers on a male mold, pasting the glass fiber cloth with a thickness of about 1mm, pasting 4 layers on the thinnest portion, and pasting the glass fiber cloth with a thickness of about 0.7mm, wherein the ratio of the pasted thickness to the thickness of the corresponding portion of the radome is 0.5. Calculating the residual volume of the antenna housing minus the pasted fiber reinforced resin prepreg area, calculating the mass of the chopped fiber resin premix to be poured according to the residual volume and the design required density to be 20.7g, weighing 7g of glass fiber with the length of 6mm, 12g of epoxy resin and 1.7g of triethylene tetramine curing agent, and uniformly mixing to form the chopped fiber resin premix; the ratio of the fiber length of 6mm to the minimum thickness of 0.7mm of the radome potting area is 8.6; the weight ratio of the short fibers in the chopped fiber resin premix is 0.34. And coating the chopped fiber resin premix on the molded surface of the female die, positioning the male die above the female die, closing the female die and the male die, compacting, heating at 40 ℃ for 2h for curing, and demolding to obtain the antenna housing to be prepared.
Particularly, the structures of the male mold and the female mold in the molding method of the present application are the same as those in the prior art, and the shapes of the male mold and the female mold are matched with the shape of the radome to be prepared, which is not described herein again.
It should be noted that the forming method of the present invention is particularly suitable for the radome with high pasting difficulty (in the case of small volume, complex profile structure, etc.), the radome with special-shaped structure such as uneven thickness, large curvature change, deep cavity, etc., and the radome with simple profile structure and uniform thickness.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: each embodiment does not include only one independent technical solution, and in the case of no conflict between the solutions, the technical features mentioned in the respective embodiments can be combined in any way to form other embodiments which can be understood by those skilled in the art.
Furthermore, modifications may be made to the technical solutions described in the foregoing embodiments, or equivalents may be substituted for some of the technical features thereof, without departing from the scope of the present invention, and the essence of the corresponding technical solutions does not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.
Claims (10)
1. A molding method of a fiber reinforced resin matrix composite material radome is characterized by comprising the following steps:
s1, pasting fiber reinforced resin prepreg cloth on the male die;
s2, calculating the residual volume of the pasted fiber reinforced resin prepreg area subtracted from the radome, and calculating the mass of the chopped fiber resin premix to be poured according to the residual volume and the design required density;
s3, uniformly distributing the chopped fiber resin premix on the molded surface of the female die;
s4, closing the die with the female die at the bottom and the male die at the top, compacting and curing;
and S5, demolding to obtain the antenna housing to be prepared.
2. The molding method according to claim 1, wherein: the ratio of the thickness of the fiber reinforced resin prepreg pasted on the male mold to the thickness of the corresponding radome is 0.1 to 0.9.
3. The molding method according to claim 1, wherein: and calculating the value obtained by subtracting the thickness of the pasted fiber reinforced resin prepreg cloth at the corresponding position from the thickness of each position of the radome to obtain a minimum value, wherein the ratio of the length of the short fibers in the chopped fiber resin premix to the minimum value is less than 20.
4. The molding method according to claim 1, wherein: the weight ratio of the short fibers in the chopped fiber resin premix is 0.3-0.7.
5. The molding method according to claim 2, wherein: the ratio of the thickness of the fiber reinforced resin prepreg pasted on the male mold to the thickness of the corresponding radome was 0.5.
6. A molding method of a fiber reinforced resin matrix composite material radome is characterized by comprising the following steps:
s1, infiltrating the dry fiber cloth with resin to obtain infiltrated resin fiber cloth, and pasting the infiltrated resin fiber cloth on a male die; or
And (3) coating resin after the dry fiber surface is paved on the male die, so that the dry fiber cloth paved on the male die becomes the soaked resin fiber cloth.
S2, calculating the residual volume of the antenna housing minus the pasted impregnated resin fiber cloth area, and calculating the mass of the chopped fiber resin premix to be poured according to the residual volume and the design required density;
s3, uniformly distributing the chopped fiber resin premix on a female die surface;
s4, closing the die with the female die at the bottom and the male die at the top, compacting and curing;
and S5, demolding to obtain the antenna housing to be prepared.
7. The molding method according to claim 6, wherein: the ratio of the thickness of the resin-impregnated fiber cloth pasted on the male mold to the thickness of the corresponding radome is 0.1 to 0.9.
8. The molding method according to claim 6, wherein: and calculating the value obtained by subtracting the thickness of the pasted impregnated resin fiber cloth at the corresponding position from the thickness of each position of the radome to obtain a minimum value, wherein the ratio of the length of the short fibers in the chopped fiber resin premix to the minimum value is less than 20.
9. The molding method according to claim 6, wherein: the weight ratio of the short fibers in the chopped fiber resin premix is 0.3-0.7.
10. The molding method according to claim 7, wherein: the ratio of the thickness of the fiber reinforced resin prepreg pasted on the male mold to the thickness of the corresponding radome was 0.5.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011275262.0A CN112549580B (en) | 2020-11-16 | 2020-11-16 | Method for forming fiber reinforced resin matrix composite material antenna housing |
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| CN202011275262.0A CN112549580B (en) | 2020-11-16 | 2020-11-16 | Method for forming fiber reinforced resin matrix composite material antenna housing |
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| CN112549580B CN112549580B (en) | 2022-06-10 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114750433A (en) * | 2022-03-25 | 2022-07-15 | 中国电子科技集团公司第三十八研究所 | RTM (resin transfer molding) mold and molding method for double-edge variable-section thin-wall composite material antenna cylinder |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JPS59167103A (en) * | 1983-03-11 | 1984-09-20 | Yashiro Kako Kk | Parabolic reflective plate for antenna |
| CN102320144A (en) * | 2011-06-30 | 2012-01-18 | 北京航空航天大学 | Manufacture die for carbon fiber composite integrative multipass joint and preparation method thereof |
| CN104441678A (en) * | 2014-09-30 | 2015-03-25 | 湖北三江航天江北机械工程有限公司 | Preparation method of broadband wave-transmission resin based radome with irregular structure |
| JP2016149756A (en) * | 2015-02-09 | 2016-08-18 | 三菱電機株式会社 | Radome for aviation body and manufacturing method of the same |
| CN107891616A (en) * | 2017-11-29 | 2018-04-10 | 上海无线电设备研究所 | A kind of polymer matrix composites antenna house spraying forming device and method |
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2020
- 2020-11-16 CN CN202011275262.0A patent/CN112549580B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59167103A (en) * | 1983-03-11 | 1984-09-20 | Yashiro Kako Kk | Parabolic reflective plate for antenna |
| CN102320144A (en) * | 2011-06-30 | 2012-01-18 | 北京航空航天大学 | Manufacture die for carbon fiber composite integrative multipass joint and preparation method thereof |
| CN104441678A (en) * | 2014-09-30 | 2015-03-25 | 湖北三江航天江北机械工程有限公司 | Preparation method of broadband wave-transmission resin based radome with irregular structure |
| JP2016149756A (en) * | 2015-02-09 | 2016-08-18 | 三菱電機株式会社 | Radome for aviation body and manufacturing method of the same |
| CN107891616A (en) * | 2017-11-29 | 2018-04-10 | 上海无线电设备研究所 | A kind of polymer matrix composites antenna house spraying forming device and method |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114750433A (en) * | 2022-03-25 | 2022-07-15 | 中国电子科技集团公司第三十八研究所 | RTM (resin transfer molding) mold and molding method for double-edge variable-section thin-wall composite material antenna cylinder |
| CN114750433B (en) * | 2022-03-25 | 2023-09-05 | 中国电子科技集团公司第三十八研究所 | Double-edge variable-section thin-wall composite material antenna tube RTM (real time kinematic) die and forming method |
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| CN112549580B (en) | 2022-06-10 |
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