CN114843747B - Preparation method of metal and composite material extreme low temperature resistant waterproof conformal radome - Google Patents
Preparation method of metal and composite material extreme low temperature resistant waterproof conformal radome Download PDFInfo
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- CN114843747B CN114843747B CN202210572973.7A CN202210572973A CN114843747B CN 114843747 B CN114843747 B CN 114843747B CN 202210572973 A CN202210572973 A CN 202210572973A CN 114843747 B CN114843747 B CN 114843747B
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/27—Adaptation for use in or on movable bodies
- H01Q1/28—Adaptation for use in or on aircraft, missiles, satellites, or balloons
- H01Q1/285—Aircraft wire antennas
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/42—Housings not intimately mechanically associated with radiating elements, e.g. radome
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Abstract
The invention discloses a metal and composite material ultra-low temperature resistant waterproof conformal radome and a preparation method thereof, and relates to the technical field of radome preparation, in particular to a radome, a metal frame and a hollow bushing; the wave-transmitting cover and the metal frame are provided with mounting holes, the hollow bushing is arranged in the mounting holes, the two ends of the hollow bushing are turned into flanges through pressure riveting, and the wave-transmitting cover and the metal frame are bonded and connected into a whole; silicon rubber is filled between the wave-transmitting cover and the metal frame; compared with the radome adopting the common composite material process, the radome disclosed by the invention has the advantages of good overall rigidity, good high-low temperature and especially extremely low temperature tolerance, no interlayer binding force risk, high long-term reliability of the mounting hole, capability of meeting the hoisting bearing requirement of each module of the antenna body on the radome, no influence on the original size, and capability of solving the risks of surface pit ponding, thermal mismatch paint cracking and the like caused by heterogeneous splicing of the structural bearing area and the wave-transmitting area in the traditional process.
Description
Technical Field
The invention relates to the technical field of radome preparation, in particular to a metal and composite material ultralow-temperature-resistant waterproof conformal radome and a preparation method thereof.
Background
Radomes are structures that protect the antenna system from the external environment; on one hand, the electric performance needs to have good wave transmission performance and lower electric loss, and on the other hand, the mechanical performance can withstand the action of external severe environment; the airborne radome has good strength and natural environment adaptability due to long-term exposure to the ground and high-altitude flight environment, and also has corresponding antenna mounting interface and load bearing capacity for the antenna body to be mounted inside; with the development of special requirements such as light weight, integration and stealth, the application of the onboard conformal radome is more and more, and the special effect of the aircraft skin for bearing pneumatic load is considered besides the basic capability; therefore, high strength, multifunction and high reliability are important indicators of the onboard conformal radome.
The conformal radome of the airborne platform generally works in a complex external environment, and the radome faces the examination of severe alternating environments such as temperature, humidity, rainwater, dust, solar radiation and the like for a long time, so that the requirements on the preparation process of the radome are high; particularly for equipment platforms such as unmanned aerial vehicles and the like which fly high, the ground environment temperature can be up to 70 ℃, and the plane surface temperature can be down to-68 ℃ or even lower during high-altitude flight, so that the environment adaptability requirement of the radome is very high; for the high-altitude airborne conformal radome, the requirements of an aircraft platform are met from the aspects of an installation interface and appearance, wave transmission performance is considered, installation of an internal antenna body is considered, the requirements of severe environments such as extremely low temperature for a long time are met, the quality problems such as water inflow, paint cracking, moisture absorption and layering are avoided, and great difficulty is brought to the preparation technology of the high-altitude airborne conformal radome.
The airborne radome is generally molded by adopting epoxy resin and other resins as matrix materials and adopting glass fiber, quartz fiber and other fiber materials as reinforcing materials; the main forming process is that two materials are firstly made into prepreg cloth to realize resin and fiber fabrics, and then the prepreg cloth is formed by paving layers by layers on a forming die and then curing by a vacuum autoclave process, wherein the process is also called a composite material forming technology; the composite material product prepared by adopting the autoclave process generally has larger X, Y-directional tensile strength, but has poorer shearing strength, and is mainly characterized by weaker bonding force between Z-directional layers, and is difficult to bear larger Z-directional load.
Because the antenna performance is closely related to the relative position accuracy of the antenna housing and the antenna body, the antenna body is directly arranged on the antenna housing in a common use mode; for the mounting concrete scheme of the conformal antenna of the plane, the main implementation measures are as follows:
1. directly processing countersunk mounting holes on the radome, and fixing the antenna body to the radome through the mounting holes; according to the scheme, on one hand, the surface integrity of the radome is greatly damaged, the appearance attractiveness is influenced, the risk that rainwater enters the antenna body is also brought, meanwhile, the antenna body is directly arranged on the composite material, so that the radome is difficult to bear the load intensity in the Z-direction long time, and serious quality risks such as composite material cracking exist;
2. riveting a metal transition member after the antenna housing composite material is formed, and installing an antenna body through the metal transition member; the problem of damaging the integrity and the appearance of the surface of the radome still exists, and the risk of cracking and falling off of paint on the rivet head after the rivet head is stressed in a long-term environment exists;
3. embedding a metal component when the antenna housing composite material is formed, processing a threaded hole on the metal component, and then installing an antenna body; the process has the advantages that the surface integrity of the radome is prevented from being damaged, but the risk is that a larger thermal expansion coefficient difference exists between the composite material of the radome and the metal component material, and the temperature of the composite material of the radome is generally higher than 150 ℃ in the forming process, so that when the radome returns to the room temperature after being formed, a larger internal stress exists in the radome, and the significant quality problem of the interfacial cracking of the radome and the embedded metal component is likely to occur in long-term outdoor high-low temperature environments, particularly in extremely low temperature environments.
Therefore, these problems are the actual engineering problems faced in the current conformal airborne radome development process, and are the key improvement direction of radome design and manufacture.
Disclosure of Invention
The invention aims at: aiming at the preparation requirement of the conformal airborne radome with the integrated installation of the antenna body, the metal and composite material ultra-low temperature resistant waterproof conformal radome and the preparation method thereof are provided, the manufacturability is strong, the use reliability is high, the problems that the antenna body is installed on the radome, the radome is installed in a conformal manner with an airplane, the antenna is waterproof and resistant to high and low temperatures, particularly in an ultra-low temperature for a long time, the reliability is high are solved, and the problems are solved.
The technical scheme of the invention is as follows:
a metallic and composite very low temperature resistant waterproof conformal radome, comprising: the wave-transmitting cover and the wave-transmitting cover are attached and connected into a whole; the hollow bushing is used for attaching and connecting the wave-transmitting cover and the metal frame into a whole;
the wave-transmitting cover and the metal frame are provided with mounting holes, the hollow bushing is arranged in the mounting holes, the two ends of the hollow bushing are turned into flanges through pressure riveting, and the wave-transmitting cover and the metal frame are bonded and connected into a whole; the hollow bushing in the mounting hole realizes the dual functions of fixedly connecting the wave-transmitting cover with the metal frame and mounting the interface of the antenna cover;
and silicon rubber is filled between the wave-transmitting cover and the metal frame.
Further, the wave-transmitting cover is formed by a wave-transmitting fiber reinforced resin composite material by adopting a vacuum autoclave process;
the metal frame is formed by adopting numerical control machining of an aluminum alloy material.
Further, the hollow bushing is a stainless steel bushing with hollow holes.
Further, the surface of the metal frame is subjected to integral color chemical oxidation treatment, so that the surface quality state of the joint surface of the metal frame and the wave-transmitting cover is ensured.
A preparation method of a metal and composite material extreme low temperature resistant waterproof conformal radome comprises the following steps:
step S1: the wave-transmitting cover and the metal frame are formed independently;
step S2: polishing and roughening the joint surface of the wave-transparent cover and the metal frame;
step S3: cleaning the joint surface of the wave-transmitting cover and the metal frame, and drying;
step S4: silicon rubber is respectively filled on the joint surfaces of the wave-transmitting cover and the metal frame;
step S5: combining the wave-transmitting cover and the metal frame to form the antenna cover, and extruding redundant silicon rubber between the joint surfaces of the wave-transmitting cover and the metal frame through riveting the hollow bushing to realize the close fit and fixation of the wave-transmitting cover and the metal frame;
step S6: airing the radome to solidify the silicone rubber;
step S7: coating silicon rubber on the right-angle bottom formed by the wave-transparent cover and the metal frame, and forming a rubber piling effect;
step S8: and airing the radome to solidify the silicone rubber, thereby completing the preparation of the radome.
Further, the step S1 includes:
the wave-transmitting cover is formed on the forming die by adopting a vacuum autoclave process, and when the wave-transmitting cover is formed, the bonding surface of the wave-transmitting cover, which is bonded with the metal frame, is tightly bonded with the forming die, so that good bonding property between the wave-transmitting cover and the metal frame is ensured;
forming a metal frame on a numerical control machine tool by adopting a numerical control machining process; and the surface of the metal frame is subjected to integral color chemical oxidation, so that the surface quality state of the joint surface of the metal frame and the radome is ensured.
Further, the step S3 includes:
and cleaning the joint surface of the wave-transparent cover and the metal frame by adopting an organic solvent, and drying.
Further, the step S5 includes:
step S51: combining the wave-transmitting cover and the metal frame to enable the joint surfaces of the wave-transmitting cover and the metal frame to be jointed to form the radome;
step S52: the four corners of the radome are respectively provided with hollow bushings in the mounting holes;
step S53: the hollow bushings are riveted one by one through a riveting press according to the diagonal relation, so that the hollow bushings are riveted in a turning mode, and the redundant silicon rubber between the wave-transmitting cover and the joint surface of the metal frame is extruded through the riveting;
step S54: and sequentially installing the rest hollow bushings, and wiping out the extruded silicon rubber to realize the close and fixation of the wave-transparent cover and the metal frame.
Further, the step S6 includes:
horizontally placing the radome on a clean operation table with good ventilation, airing at room temperature until the silicone rubber is solidified, wherein the airing time is more than or equal to 72 hours;
step S7, including:
and (3) adopting silicon rubber at the bottom of the right angle formed by the wave-transmitting cover and the metal frame, and continuously dispensing glue by using a glue dispenser to form a glue piling effect.
Further, the step S8 includes:
step S81: and (3) within 2 minutes after dispensing, starting vacuum defoaming treatment on the silicone rubber by adopting vacuum defoaming equipment, wherein the treatment process parameters are as follows: the vacuum degree is less than or equal to 100Pa, and the natural gas is discharged to the standard atmospheric pressure after the pressure maintaining time is 3min-5 min;
step S82: the dispensing surface is kept to be horizontally upwards, the radome is horizontally placed on a clean operation table with good ventilation, and the radome is aired at room temperature until the silicone rubber is solidified, wherein the airing time is more than or equal to 72 hours.
Compared with the prior art, the invention has the beneficial effects that:
1. the metal and composite material extremely low temperature resistant waterproof conformal radome is characterized in that a hollow bushing is riveted at the original position of a radome mounting hole, so that the structural positioning and mechanical assembly of a wave-transmitting cover and a metal frame are realized, and the original installation is realized on the premise of not additionally punching holes; meanwhile, the threaded mounting holes can be processed on the metal frame for mounting functional modules such as the antenna array surface, on the premise that additional holes are not punched on the wave-transparent cover, the relative position precision of the antenna array surface and the antenna cover is guaranteed, the complete sealing performance of the exposed surface of the antenna cover is guaranteed, and the original attractive appearance of the antenna cover is guaranteed.
2. The preparation method of the metal and composite material extremely low temperature resistant waterproof conformal radome adopts a preparation method of riveting and silicone rubber filling, so that the radome has mechanical high-strength connection and elastomer gap filling, has excellent vibration resistance, can also meet watertight sealing effect, and has excellent properties of rain resistance, salt fog resistance, damp heat resistance and the like; compared with the process technology of co-curing the wave-transmitting cover on the traditional metal frame, the method can avoid the problems of high-low temperature stress cracking and the like caused by unmatched thermal expansion coefficients of the metal material and the wave-transmitting fiber material, and particularly, the 703 silicon rubber has excellent low-temperature adaptability and can meet the requirement of being used outside an airborne cabin in a high-altitude extremely-low-temperature environment.
3. A preparation method of a metal and composite material extremely low temperature resistant waterproof conformal radome is characterized in that elastic silicon rubber is filled in the joint surface of a wave-transmitting radome and a metal frame and is cured at normal temperature, so that the problems of stress deformation, cracking, layering and the like caused by inconsistent thermal expansion coefficients (the thermal expansion coefficient of glass fiber is about 3 multiplied by 10 < -6 >/DEG C, the thermal expansion coefficient of aluminum alloy is about 23.2multiplied by 10 < -6 >/DEG C, and the difference is about 8 times) of glass fiber of a wave-transmitting radome material and aluminum alloy raw materials of the metal frame in the use environment of the radome in the traditional high temperature co-curing process can be avoided, and the yield and the long-term temperature environment reliability are greatly improved; meanwhile, the procedures of riveting, glue filling and the like are all normal temperature operation, only a manual dispensing machine and a riveting tool are needed, and special equipment such as an extra vacuum autoclave, a high-temperature oven and the like is not needed, so that the process operation is simple, the economy is good and the cost is low.
Drawings
FIG. 1 is a schematic diagram of a metallic and composite very low temperature resistant waterproof conformal radome;
FIG. 2 is a schematic view of a metal and composite extreme low temperature waterproof conformal radome from another view angle;
FIG. 3 is a schematic illustration of a hollow liner of a metallic and composite very low temperature resistant waterproof conformal radome;
fig. 4 is a flow chart of a method of making a metallic and composite very low temperature resistant waterproof conformal radome.
Reference numerals: 1-wave-transmitting cover, 2-metal frame, 3-hollow lining and 4-silicon rubber.
Detailed Description
It is noted that relational terms such as "first" and "second", and the like, are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
The features and capabilities of the present invention are described in further detail below in connection with examples.
Example 1
Because the antenna performance is closely related to the relative position accuracy of the antenna housing and the antenna body, the antenna body is directly arranged on the antenna housing in a common use mode; for the mounting concrete scheme of the conformal antenna of the plane, the main implementation measures are as follows:
1. directly processing countersunk mounting holes on the radome, and fixing the antenna body to the radome through the mounting holes; according to the scheme, on one hand, the surface integrity of the radome is greatly damaged, the appearance attractiveness is influenced, the risk that rainwater enters the antenna body is also brought, meanwhile, the antenna body is directly arranged on the composite material, so that the radome is difficult to bear the load intensity in the Z-direction long time, and serious quality risks such as composite material cracking exist;
2. riveting a metal transition member after the antenna housing composite material is formed, and installing an antenna body through the metal transition member; the problem of damaging the integrity and the appearance of the surface of the radome still exists, and the risk of cracking and falling off of paint on the rivet head after the rivet head is stressed in a long-term environment exists;
3. embedding a metal component when the antenna housing composite material is formed, processing a threaded hole on the metal component, and then installing an antenna body; the process has the advantages that the surface integrity of the radome is prevented from being damaged, but the risk is that a larger thermal expansion coefficient difference exists between the composite material of the radome and the metal component material, and the temperature of the composite material of the radome is generally higher than 150 ℃ in the forming process, so that when the radome returns to the room temperature after being formed, a larger internal stress exists in the radome, and the significant quality problem of the interfacial cracking of the radome and the embedded metal component is likely to occur in long-term outdoor high-low temperature environments, particularly in extremely low temperature environments.
Aiming at the problems, the embodiment provides the metal and composite material extremely low temperature resistant waterproof conformal radome and the preparation method thereof, which have strong manufacturability and high use reliability, can simultaneously solve the problems of installation of the antenna body on the radome, conformal installation of the radome and an airplane, water resistance, high and low temperature resistance and higher reliability in particular to extremely low temperature for a long time, and solve the problems.
Referring to fig. 1-4, a metal and composite material ultra-low temperature resistant waterproof conformal radome specifically comprises the following structures:
a wave-transmitting cover 1 and a metal frame 2 which is integrally attached to the wave-transmitting cover 1; a hollow bushing 3 used for attaching and connecting the wave-transparent cover 1 and the metal frame 2 into a whole; preferably, the wave-transmitting cover 1 is formed by a wave-transmitting fiber reinforced resin composite material by adopting a vacuum autoclave process; the metal frame 2 is formed by adopting numerical control machining of an aluminum alloy material;
the wave-transparent cover 1 and the metal frame 2 are provided with mounting holes, the hollow bushing 3 is arranged in the mounting holes, the two ends of the hollow bushing 3 are turned into edges through pressure riveting, and the wave-transparent cover 1 and the metal frame 2 are bonded and connected into a whole; the hollow bushing 3 in the mounting hole realizes the dual functions of fixedly connecting the wave-transparent cover 1 with the metal frame 2 and mounting the antenna cover interface; preferably, the hollow bush 3 is a stainless steel bush with a hollow hole, and the hollow hole is used as a radome mounting interface;
In this embodiment, the surface of the metal frame 2 is subjected to an overall color chemical oxidation treatment, so as to ensure the surface quality state of the joint surface of the metal frame 2 and the wave-transparent cover 1.
A metal and composite material extremely low temperature resistant waterproof conformal radome is characterized in that a hollow bushing 3 is riveted at the original position of a radome mounting hole, so that the structural positioning and mechanical assembly of a wave-transparent cover 1 and a metal frame 2 are realized, and the original installation is realized on the premise of not additionally punching; meanwhile, the threaded mounting holes can be processed on the metal frame 2 for mounting functional modules such as an antenna array surface, and on the premise that no additional holes are punched on the wave-transparent cover 1, the relative position precision of the antenna array surface and the antenna cover is guaranteed, the complete sealing performance of the exposed surface of the antenna cover is guaranteed, and the original attractive appearance of the antenna cover is also guaranteed. A preparation method of a metal and composite material extreme low temperature resistant waterproof conformal radome comprises the following steps:
step S1: the wave-transmitting cover and the metal frame are formed independently;
in this embodiment, specifically, the step S1 includes:
the wave-transmitting cover is formed on the forming die by adopting a vacuum autoclave process, and when the wave-transmitting cover is formed, the bonding surface of the wave-transmitting cover, which is bonded with the metal frame, is tightly bonded with the forming die, so that good bonding property between the wave-transmitting cover and the metal frame is ensured;
forming a metal frame on a numerical control machine tool by adopting a numerical control machining process; and the surface of the metal frame is subjected to integral color chemical oxidation, so that the surface quality state of the joint surface of the metal frame and the radome is ensured;
step S2: polishing and roughening the joint surface of the wave-transparent cover and the metal frame; preferably, the joint surface of the wave-transparent cover and the metal frame is roughened by sand paper;
step S3: cleaning the joint surface of the wave-transmitting cover and the metal frame, and drying;
in this embodiment, specifically, the step S3 includes:
cleaning the joint surface of the wave-transparent cover and the metal frame by adopting an organic solvent, and drying; preferably, acetone is adopted to clean the joint surface of the wave-transparent cover and the metal frame;
step S4: silicon rubber is respectively filled on the joint surfaces of the wave-transmitting cover and the metal frame; preferably, the blade coating is approximately even after filling is completed; preferably, the silicone rubber is of the type: 703;
step S5: combining the wave-transmitting cover and the metal frame to form the antenna cover, and extruding redundant silicon rubber between the joint surfaces of the wave-transmitting cover and the metal frame through riveting the hollow bushing to realize the close fit and fixation of the wave-transmitting cover and the metal frame;
in this embodiment, specifically, the step S5 includes:
step S51: combining the wave-transmitting cover and the metal frame to enable the joint surfaces of the wave-transmitting cover and the metal frame to be jointed to form the radome;
step S52: the four corners of the radome are respectively provided with hollow bushings in the mounting holes;
step S53: the hollow bushings are riveted one by one through a riveting press according to the diagonal relation, so that the hollow bushings are riveted in a turning mode, and the redundant silicon rubber between the wave-transmitting cover and the joint surface of the metal frame is extruded through the riveting;
step S54: and sequentially installing the rest hollow bushings, and wiping out the extruded silicon rubber to realize the close and fixation of the wave-transparent cover and the metal frame.
Step S6: airing the radome to solidify the silicone rubber;
in this embodiment, specifically, the step S6 includes:
horizontally placing the radome on a clean operation table with good ventilation, airing at room temperature until the silicone rubber is solidified, wherein the airing time is more than or equal to 72 hours;
step S7: coating silicon rubber on the right-angle bottom formed by the wave-transparent cover and the metal frame, and forming a rubber piling effect;
in this embodiment, specifically, step S7 includes:
and (3) adopting silicon rubber at the right-angle bottom formed by the wave-transparent cover and the metal frame (namely at the junction gap between the wave-transparent cover and the joint surface of the metal frame), and continuously dispensing glue by using a glue dispenser to form a glue piling effect.
Step S8: and airing the radome to solidify the silicone rubber, thereby completing the preparation of the radome.
In this embodiment, specifically, the step S8 includes:
step S81: in 2 minutes after dispensing, vacuum defoaming treatment is carried out on the silicone rubber by adopting vacuum defoaming equipment, namely the whole antenna housing is placed in the vacuum defoaming equipment, and the vacuum defoaming treatment is carried out; the treatment process parameters are as follows: the vacuum degree is less than or equal to 100Pa, and the natural gas is discharged to the standard atmospheric pressure after the pressure maintaining time is 3min-5 min;
step S82: the dispensing surface is kept to be horizontally upwards, the radome is horizontally placed on a clean operation table with good ventilation, and the radome is aired at room temperature until the silicone rubber is solidified, wherein the airing time is more than or equal to 72 hours.
The preparation method adopting riveting and silicone rubber filling adopted by the embodiment has the advantages of mechanical high-strength connection, elastomer gap filling, excellent vibration resistance, water tightness sealing effect, excellent rain resistance, salt fog resistance, damp heat resistance and the like; compared with the process technology of co-curing the wave-transmitting cover on the traditional metal frame, the method can avoid the problems of high-low temperature stress cracking and the like caused by unmatched thermal expansion coefficients of the metal material and the wave-transmitting fiber material, and particularly, the 703 silicon rubber has excellent low-temperature adaptability and can meet the requirement of being used outside an airborne cabin in a high-altitude extremely-low-temperature environment.
The technology of filling elastic silicon rubber on the joint surface of the wave-transmitting cover and the metal frame and curing at normal temperature can avoid the problems of stress deformation, even cracking, layering and the like caused by inconsistent thermal expansion coefficients (the thermal expansion coefficient of glass fiber is about 3 multiplied by 10 < -6 >/DEG C, the thermal expansion coefficient of aluminum alloy is about 23.2multiplied by 10 < -6 >/DEG C, and the difference is about 8 times) of glass fiber of the wave-transmitting cover material and aluminum alloy raw materials of the metal frame in the use environment of the radome in the traditional high-temperature co-curing process, thereby greatly improving the yield and the long-term temperature environment reliability; meanwhile, the procedures of riveting, glue filling and the like are all normal temperature operation, only a manual dispensing machine and a riveting tool are needed, and special equipment such as an extra vacuum autoclave, a high-temperature oven and the like is not needed, so that the process operation is simple, the economy is good and the cost is low.
The foregoing examples merely represent specific embodiments of the present application, which are described in more detail and are not to be construed as limiting the scope of the present application. It should be noted that, for those skilled in the art, several variations and modifications can be made without departing from the technical solution of the present application, which fall within the protection scope of the present application.
Claims (4)
1. The preparation method of the metal and composite material ultralow-temperature-resistant waterproof conformal radome is characterized by comprising the following steps of:
step S1: the wave-transmitting cover and the metal frame are formed independently;
step S2: polishing and roughening the joint surface of the wave-transparent cover and the metal frame;
step S3: cleaning the joint surface of the wave-transmitting cover and the metal frame, and drying;
step S4: silicon rubber is respectively filled on the joint surfaces of the wave-transmitting cover and the metal frame;
step S5: combining the wave-transmitting cover and the metal frame to form the antenna cover, and extruding redundant silicon rubber between the joint surfaces of the wave-transmitting cover and the metal frame through riveting the hollow bushing to realize the close fit and fixation of the wave-transmitting cover and the metal frame;
step S6: airing the radome to solidify the silicone rubber;
step S7: coating silicon rubber on the right-angle bottom formed by the wave-transparent cover and the metal frame, and forming a rubber piling effect;
step S8: airing the radome to solidify the silicone rubber, so as to finish the preparation of the radome;
the step S1 includes:
the wave-transmitting cover is formed on the forming die by adopting a vacuum autoclave process, and when the wave-transmitting cover is formed, the bonding surface of the wave-transmitting cover, which is bonded with the metal frame, is tightly bonded with the forming die, so that good bonding property between the wave-transmitting cover and the metal frame is ensured;
forming a metal frame on a numerical control machine tool by adopting a numerical control machining process; and the surface of the metal frame is subjected to integral color chemical oxidation, so that the surface quality state of the joint surface of the metal frame and the radome is ensured;
the step S5 includes:
step S51: combining the wave-transmitting cover and the metal frame to enable the joint surfaces of the wave-transmitting cover and the metal frame to be jointed to form the radome;
step S52: the four corners of the radome are respectively provided with hollow bushings in the mounting holes;
step S53: the hollow bushings are riveted one by one through a riveting press according to the diagonal relation, so that the hollow bushings are riveted in a turning mode, and the redundant silicon rubber between the wave-transmitting cover and the joint surface of the metal frame is extruded through the riveting;
step S54: and sequentially installing the rest hollow bushings, and wiping out the extruded silicon rubber to realize the close and fixation of the wave-transparent cover and the metal frame.
2. The method for manufacturing a metallic and composite ultra-low temperature resistant waterproof conformal radome of claim 1, wherein step S3 comprises:
and cleaning the joint surface of the wave-transparent cover and the metal frame by adopting an organic solvent, and drying.
3. The method for manufacturing a metallic and composite ultra-low temperature resistant waterproof conformal radome of claim 1, wherein step S6 comprises:
horizontally placing the radome on a clean operation table with good ventilation, airing at room temperature until the silicone rubber is solidified, wherein the airing time is more than or equal to 72 hours;
step S7, including:
and (3) adopting silicon rubber at the bottom of the right angle formed by the wave-transmitting cover and the metal frame, and continuously dispensing glue by using a glue dispenser to form a glue piling effect.
4. The method for manufacturing a metallic and composite ultra-low temperature resistant waterproof conformal radome of claim 3, wherein step S8 comprises:
step S81: and (3) within 2 minutes after dispensing, starting vacuum defoaming treatment on the silicone rubber by adopting vacuum defoaming equipment, wherein the treatment process parameters are as follows: the vacuum degree is less than or equal to 100Pa, and the natural gas is discharged to the standard atmospheric pressure after the pressure maintaining time is 3min-5 min;
step S82: the dispensing surface is kept to be horizontally upwards, the radome is horizontally placed on a clean operation table with good ventilation, and the radome is aired at room temperature until the silicone rubber is solidified, wherein the airing time is more than or equal to 72 hours.
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| CN108148548A (en) * | 2016-12-05 | 2018-06-12 | 航天特种材料及工艺技术研究所 | A kind of anti-weathering wave transparent antenna house of high temperature resistant and preparation method thereof |
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| GB0127772D0 (en) * | 2001-11-20 | 2002-01-09 | Smiths Group Plc | Antennas |
| CN203721880U (en) * | 2013-12-22 | 2014-07-16 | 天津七六四通信导航技术有限公司 | Antenna housing used for antenna of satellite navigation receiver |
| US20170129588A1 (en) * | 2015-09-25 | 2017-05-11 | Howard R. Verillion, JR. | Truss-Reinforced Radome Crown Structure |
| CN107134642B (en) * | 2017-04-21 | 2019-11-12 | 航天材料及工艺研究所 | The resistance to 450 DEG C of quartz/composite polyimide material antenna house of one kind and preparation method |
| CN109449591B (en) * | 2018-10-25 | 2021-08-03 | 湖北航天技术研究院总体设计所 | Active and passive radar seeker antenna housing and aircraft |
| CN109638447B (en) * | 2018-11-30 | 2020-12-22 | 上海无线电设备研究所 | Watertight heat-insulation antenna housing and preparation method thereof |
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| CN108148548A (en) * | 2016-12-05 | 2018-06-12 | 航天特种材料及工艺技术研究所 | A kind of anti-weathering wave transparent antenna house of high temperature resistant and preparation method thereof |
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