CN117103724A - Preparation method of high-temperature-resistant radome - Google Patents
Preparation method of high-temperature-resistant radome Download PDFInfo
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- CN117103724A CN117103724A CN202311314001.9A CN202311314001A CN117103724A CN 117103724 A CN117103724 A CN 117103724A CN 202311314001 A CN202311314001 A CN 202311314001A CN 117103724 A CN117103724 A CN 117103724A
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- 238000002360 preparation method Methods 0.000 title claims abstract description 8
- 239000011347 resin Substances 0.000 claims abstract description 27
- 229920005989 resin Polymers 0.000 claims abstract description 27
- XQZYPMVTSDWCCE-UHFFFAOYSA-N phthalonitrile Chemical compound N#CC1=CC=CC=C1C#N XQZYPMVTSDWCCE-UHFFFAOYSA-N 0.000 claims abstract description 15
- 229920006391 phthalonitrile polymer Polymers 0.000 claims abstract description 15
- 229920001721 polyimide Polymers 0.000 claims abstract description 14
- 239000010453 quartz Substances 0.000 claims abstract description 14
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 14
- 238000003754 machining Methods 0.000 claims abstract description 13
- 239000000835 fiber Substances 0.000 claims abstract description 12
- 230000004888 barrier function Effects 0.000 claims description 36
- 238000005096 rolling process Methods 0.000 claims description 34
- 238000005553 drilling Methods 0.000 claims description 27
- 238000000034 method Methods 0.000 claims description 27
- 238000003825 pressing Methods 0.000 claims description 24
- 239000000243 solution Substances 0.000 claims description 23
- 238000005056 compaction Methods 0.000 claims description 11
- 238000004519 manufacturing process Methods 0.000 claims description 11
- 239000004642 Polyimide Substances 0.000 claims description 10
- 230000002093 peripheral effect Effects 0.000 claims description 10
- 239000003292 glue Substances 0.000 claims description 9
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 8
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 8
- 229910052782 aluminium Inorganic materials 0.000 claims description 8
- 239000011889 copper foil Substances 0.000 claims description 8
- 239000011888 foil Substances 0.000 claims description 8
- 230000008569 process Effects 0.000 claims description 7
- 238000007865 diluting Methods 0.000 claims description 3
- 238000010438 heat treatment Methods 0.000 claims description 3
- 239000011259 mixed solution Substances 0.000 claims description 3
- 238000002156 mixing Methods 0.000 claims description 3
- 238000004321 preservation Methods 0.000 claims description 3
- 239000007787 solid Substances 0.000 claims description 3
- 239000002904 solvent Substances 0.000 claims description 3
- 239000004744 fabric Substances 0.000 abstract description 4
- 239000009719 polyimide resin Substances 0.000 abstract description 4
- 239000002994 raw material Substances 0.000 abstract description 2
- 230000006835 compression Effects 0.000 description 5
- 238000007906 compression Methods 0.000 description 5
- 239000000919 ceramic Substances 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 230000002159 abnormal effect Effects 0.000 description 2
- 238000005520 cutting process Methods 0.000 description 2
- 230000000149 penetrating effect Effects 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 208000012260 Accidental injury Diseases 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000000748 compression moulding Methods 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 230000000670 limiting effect Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 238000003801 milling Methods 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 239000011226 reinforced ceramic Substances 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
- B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
- B29C70/28—Shaping operations therefor
- B29C70/30—Shaping by lay-up, i.e. applying fibres, tape or broadsheet on a mould, former or core; Shaping by spray-up, i.e. spraying of fibres on a mould, former or core
- B29C70/34—Shaping by lay-up, i.e. applying fibres, tape or broadsheet on a mould, former or core; Shaping by spray-up, i.e. spraying of fibres on a mould, former or core and shaping or impregnating by compression, i.e. combined with compressing after the lay-up operation
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B26—HAND CUTTING TOOLS; CUTTING; SEVERING
- B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
- B26D7/00—Details of apparatus for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting
- B26D7/01—Means for holding or positioning work
- B26D7/02—Means for holding or positioning work with clamping means
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B26—HAND CUTTING TOOLS; CUTTING; SEVERING
- B26F—PERFORATING; PUNCHING; CUTTING-OUT; STAMPING-OUT; SEVERING BY MEANS OTHER THAN CUTTING
- B26F1/00—Perforating; Punching; Cutting-out; Stamping-out; Apparatus therefor
- B26F1/16—Perforating by tool or tools of the drill type
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B15/00—Pretreatment of the material to be shaped, not covered by groups B29B7/00 - B29B13/00
- B29B15/08—Pretreatment of the material to be shaped, not covered by groups B29B7/00 - B29B13/00 of reinforcements or fillers
- B29B15/10—Coating or impregnating independently of the moulding or shaping step
- B29B15/12—Coating or impregnating independently of the moulding or shaping step of reinforcements of indefinite length
- B29B15/122—Coating or impregnating independently of the moulding or shaping step of reinforcements of indefinite length with a matrix in liquid form, e.g. as melt, solution or latex
- B29B15/125—Coating or impregnating independently of the moulding or shaping step of reinforcements of indefinite length with a matrix in liquid form, e.g. as melt, solution or latex by dipping
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Composite Materials (AREA)
- Life Sciences & Earth Sciences (AREA)
- Forests & Forestry (AREA)
- Details Of Aerials (AREA)
Abstract
The invention discloses a preparation method of a high-temperature-resistant radome, the prepared radome adopts phthalonitrile resin, polyimide resin and quartz fiber cloth as raw materials, quartz fibers and resin solution are subjected to presoaking to obtain presoaked cloth, wherein the quartz fibers, the phthalonitrile resin and the polyimide resin are compounded according to a certain proportion, and a radome blank is obtained through layering, curing and forming; and (5) machining the radome blank, so as to obtain a radome product. The radome can resist high temperature of 500-600 ℃, has dielectric constant as low as 3.0 and loss tangent as low as 0.001. But also has sufficient mechanical strength and proper elastic modulus.
Description
Technical Field
The invention relates to the technical field of radome preparation, in particular to a preparation method of a high-temperature-resistant radome.
Background
Radomes are an important component of radar systems, and are important in providing an all-weather operating environment for radomes. For the radar carried by the aircraft, the radome enables the radar to work with high precision under various severe weather conditions, so that the reliability and the service life of the radar are greatly improved, and the maintenance and repair cost is reduced. With the continuous improvement of the flying speed of the aircraft, new requirements are put forward on the existing radome, for example, the radome not only needs to have the performances of high temperature resistance, salt fog resistance, damp heat resistance, solar radiation resistance and the like, but also has the functions of structural bearing, high wave permeability and the like.
At present, a resin matrix composite material type high-temperature resistant radome is mostly molded by adopting a quartz reinforced polyimide compression molding process, the dielectric constant of the product is 3.2, and the temperature resistance is about 450 ℃. And the radome materials used at 500-600 ℃ are mostly ceramic type: quartz reinforced ceramic radomes, ceramic radomes. The ceramic substrate radome has the problems of high processing difficulty and high cost.
While phthalonitrile resin has the possibility of resisting 500-600 ℃, but has no report on curing conditions, but the use of phthalonitrile resin in the field of high-temperature radomes is not reported.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a preparation method of a high-temperature-resistant radome.
The aim of the invention is realized by the following technical scheme:
a preparation method of a high-temperature-resistant radome comprises the following steps:
s1, mixing a polyimide solution and a phthalonitrile resin solution, wherein the mass ratio of the polyimide solution to the phthalonitrile resin solution is 1:1-1:3; diluting the mixed solution, and adding a certain amount of solvent into the mixed resin solution to ensure that the solid content is 25-40%; wherein the Tg of the polyimide is more than or equal to 350 ℃, and the Tg of the phthalonitrile resin is more than or equal to 400 ℃; then, the quartz reinforced fiber and the high-temperature mixed resin glue solution are immersed to obtain a premix, wherein the mass ratio of the quartz reinforced fiber to the high-temperature mixed resin glue solution is 5:1-1.5:1;
s2, curing and forming the premix through curing equipment, so as to obtain a radome blank;
s3, bonding a barrier layer on the outer periphery side of the radome blank, wherein the barrier layer comprises copper foil or aluminum foil;
s4, machining the radome blank obtained in the step S2, so as to obtain a radome product, wherein machining comprises machining a positioning hole required by the radome product through drilling equipment, and the drilling equipment comprises a pressing piece which can be pressed on the outer peripheral side of the radome blank so as to keep the barrier layer in flat fit with the outer peripheral side of the radome blank during drilling.
The thickness of the barrier layer is 0.15-0.35mm.
And in the step S2, the premix is added into a die for pressure curing, wherein the curing process is that the heating rate is 15-25 ℃/h, the pressurizing temperature is 220-230 ℃, the curing temperature is 350-370 ℃, the heat preservation is carried out for 1.2-2h, the pressure is 0.8-1.2MPa, and the vacuum gauge pressure is less than or equal to-0.097 MPa.
The drilling equipment further comprises an installing table, a drilling machine is arranged on the installing table, the compressing piece comprises a compressing block supported on the installing table, a compressing groove which is matched with the shape of the radome blank is formed in the side wall of the compressing block, a first auxiliary hole is further formed in the compressing block in a penetrating mode, and the first auxiliary hole is opposite to the hole position of the preset positioning hole of the radome blank.
The drilling machine is a multi-shaft drilling machine.
The compressing groove is provided with a compressing plate in a bouncing way around the compressing surface on the outer periphery side of the radome blank, a second auxiliary hole opposite to the first auxiliary hole is formed in the compressing plate at the upper and lower positions, a first locking piece is further arranged on the compressing block, and the first locking piece can drive the compressing plate to move away from one side of the radome blank.
The compression groove is provided with a mounting groove around the compression surface of the outer peripheral side of the radome blank, a rolling wheel is arranged in the mounting groove in a bouncing way, a second locking piece is also arranged in the mounting groove, and the second locking piece can drive the rolling wheel to integrally move away from one side of the radome blank;
the compaction plate is provided with a through groove, the through groove is opposite to the rolling wheel, and the rolling wheel stretches out of the through groove in a natural state.
The first locking piece and the second locking piece are electromagnets, and the electromagnets are electrified to generate magnetic force and adsorb the whole rolling wheel or one side of the compacting plate, which is away from the antenna housing blank, to move.
An elastic layer is arranged on the outer periphery of the rolling wheel.
The end face of the compaction groove is a positioning surface, and a contact switch is arranged on the positioning surface;
in the initial state, the first locking piece is electrified and the second locking piece is powered off, and the rolling wheel extends out of the through groove; when the reference surface of the radome blank is attached to the positioning surface, the contact switch is pressed, then the first locking piece is controlled to be powered off, and the pressing plate is pressed on the barrier layer on the radome blank in a natural state.
The beneficial effects of the invention are as follows: compared with the prior art, the radome prepared by the invention adopts phthalonitrile resin, polyimide resin and quartz fiber cloth as raw materials, and quartz fibers and resin solution are subjected to presoaking to obtain presoaked cloth, wherein the quartz fibers, the phthalonitrile resin and the polyimide resin are compounded according to a certain proportion, and a radome blank is obtained through layering, curing and forming; and (5) machining the radome blank, so as to obtain a radome product. The radome can resist high temperature of 500-600 ℃, has dielectric constant as low as 3.0 and loss tangent as low as 0.001. But also has sufficient mechanical strength and proper elastic modulus.
Drawings
Fig. 1 is a schematic structural view of a radome blank;
FIG. 2 is a schematic view of a barrier layer;
FIG. 3 is a schematic structural view of a drilling apparatus;
FIG. 4 is a schematic structural view of a compression block;
FIG. 5 is a schematic view of the structure of the compacting plates;
FIG. 6 is a schematic view of the structure of the rolling wheel;
fig. 7 is a schematic side view of the scroll wheel.
Reference numerals: 1. a radome blank; 2. a barrier layer; 3. drilling equipment; 4. positioning holes; 5. a pressing member; 6. a mounting table; 7. a drilling machine; 8. a compaction block; 9. a compaction groove; 10. a first auxiliary hole; 11. a compacting plate; 12. a second auxiliary hole; 13. a first locking member; 14. a mounting groove; 15. a rolling wheel; 16. a second locking member; 17. a contact switch; 18. a through groove; 19. a central body; 20. a flange portion.
Detailed Description
The technical solutions of the present invention will be clearly and completely described below with reference to the embodiments, and it is apparent that the described embodiments are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by a person skilled in the art without any inventive effort, are intended to be within the scope of the present invention, based on the embodiments of the present invention.
As shown in fig. 1 to 7, a method for manufacturing a high temperature resistant radome comprises the following steps:
s1, mixing a polyimide solution and a phthalonitrile resin solution, wherein the mass ratio of the polyimide solution to the phthalonitrile resin solution is 1:1-1:3; diluting the mixed solution, and adding a certain amount of solvent into the mixed resin solution to ensure that the solid content is 25-40%; wherein the Tg of the polyimide is more than or equal to 350 ℃, and the Tg of the phthalonitrile resin is more than or equal to 400 ℃; then, the quartz reinforced fiber and the high-temperature mixed resin glue solution are immersed to obtain a premix, wherein the mass ratio of the quartz reinforced fiber to the high-temperature mixed resin glue solution is 5:1-1.5:1;
s2, curing and forming the premix through curing equipment, so as to obtain a radome blank 1;
s3, bonding a barrier layer 2 on the outer periphery side of the radome blank 1, wherein the barrier layer 2 comprises copper foil or aluminum foil;
and S4, machining the radome blank 1 obtained in the step S2, so as to obtain a radome product, wherein the machining comprises machining the positioning holes 4 required by the radome product through the drilling equipment 3.
Wherein the thickness of the barrier layer 2 is 0.15-0.35mm. For example, it is preferable that the barrier layer 2 be formed by bonding a copper foil or aluminum foil having a thickness of 0.25mm to the outer peripheral side of the radome blank 1 by means of glue.
And in the step S2, the premix is added into a die for pressure curing, wherein the curing process is that the heating rate is 15-25 ℃/h, the pressurizing temperature is 220-230 ℃, the curing temperature is 350-370 ℃, the heat preservation is carried out for 1.2-2h, the pressure is 0.8-1.2MPa, and the vacuum gauge pressure is less than or equal to-0.097 MPa.
It will be appreciated that the outer peripheral side of the radome blank 1 described above refers to the flange portion 20 extending around the central body 19 thereof. An adhesive barrier layer 2 is required on the flange portion 20 to satisfy the protection performance of the antenna when the radome is assembled. In the above preferred process, it is necessary to adhere the barrier layer 2 to the flange portion 20 and then perform the drilling operation of the positioning hole 4, which will facilitate the more complete coverage of the flange portion 20 by the barrier layer 2. For example, in the case of first processing the positioning hole 4, it is necessary to cut a through hole that fits with the positioning hole 4 in advance in the copper foil or aluminum foil, which requires a preferable degree of coincidence between the through hole and the positioning hole 4 when the copper foil or aluminum foil is bonded; in addition, if the copper foil or aluminum foil is first adhered to the flange portion 20 and then the through-holes are cut at the opposite positions of the positioning holes 4 by the dicing blade, the cutting accidental injury of the positioning holes 4 is easily caused in this process, and the abnormal breakage of the copper foil or aluminum foil described later is also easily occurred in the cutting process. The above is not easily allowed on the design criteria for the aircraft fittings.
In the case of bonding the barrier layer 2, the thickness of the barrier layer 2 is small, so that when the drill bit touches and breaks the barrier layer 2, the barrier layer 2 may be abnormally broken beyond the range of the positioning hole 4. On the other hand, in this case, the timing of drilling the pilot hole 4 also depends on whether the adhesion of the barrier layer 2 is firm, for example, the barrier layer 2 is more likely to be broken abnormally when the glue is not yet cured at the initial stage of the adhesion.
In some embodiments, the drilling device 3 comprises a mounting table 6, and the drilling machine 7 is arranged on the mounting table 6, for example, the drilling machine 7 can be multi-axis, so that the positioning holes 4 on the radome blank 1 can be drilled at multiple angles. The compressing member 5 may include a compressing block 8 supported on the mounting table 6, and a compressing groove 9 matching the shape of the radome blank 1 is formed on the side wall of the compressing block 8. In addition, the pressing block 8 is further provided with a first auxiliary hole 10 in a penetrating manner, and the first auxiliary hole 10 is opposite to the hole position of the positioning hole 4 preset in the radome blank 1.
For example, one side surface of the radome blank 1 may be first machined by a machining apparatus to form a reference surface, such as machining of the reference surface may be performed by a grinder or a milling machine; the end face of the pressing groove 9 can be processed to form a positioning surface; during drilling operation, one end of the radome blank 1 with the reference surface can be slid and extended into the compaction groove 9, and the first auxiliary hole 10 is accurately opposite to the preset positioning hole 4 of the radome blank 1 through positioning of the reference surface and the positioning surface; the desired pilot hole 4 is then drilled downwardly in the radome blank 1 in the first auxiliary hole 10 by means of the drill 7.
It will be appreciated that the compression block 8 can be pressed onto the outer peripheral side of the radome blank 1 to maintain a flat fit of the barrier layer 2 to the outer peripheral side of the radome blank 1 when drilling. Thus, when the drill bit touches and breaks the barrier layer 2, the fracture of the barrier layer 2 is limited in the range of the positioning hole 4 due to the compaction and limiting actions of the compaction block 8; meanwhile, under the action of the pressing block 8, the positioning holes 4 can be drilled without waiting for complete solidification of the glue, and the manufacturing period of the radome is quickened to a certain extent.
In some embodiments, the hold-down slot 9 is provided with a hold-down plate 11 that springs around the hold-down surface on the outer peripheral side of the radome blank 1. The pressing surfaces depend on the configuration of the flange portion 20 of the radome blank 1, for example, in the drawing X the flange portion 20 is seen as rectangular in lateral direction, in which case the pressing groove 9 is correspondingly configured with three pressing surfaces. In addition, a second auxiliary hole 12 is formed in the pressing plate 11 at the upper and lower positions, opposite to the first auxiliary hole 10, so that a drill can drill the flange portion 20 through the first and second auxiliary holes 10 and 12. At the same time, the pressing block 8 is also provided with a first locking piece 13, and the pressing plate 11 can be driven to move away from one side of the radome blank 1 through the first locking piece 13.
Therefore, when the radome blank 1 slides laterally into the pressing groove 9, the pressing plate 11 can be driven to enter the compressed state by the first locking member 13, and the pressing groove 9 has a relatively wide size for sliding the radome blank 1, so that the situation that the barrier layer 2 is damaged due to excessive friction of the pressing block 8 is not easy to occur.
For example, the above-mentioned compression surface is further provided with a mounting groove 14, the inside of the mounting groove 14 is elastically provided with a rolling wheel 15, meanwhile, the inside of the mounting groove 14 is also provided with a second locking piece 16, and the rolling wheel 15 can be driven to move integrally away from one side of the radome blank 1 by the second locking piece 16, and at this time, the rolling wheel 15 is in a compressed state integrally; in addition, the compacting plate 11 is correspondingly provided with a through groove 18, and the rolling wheel 15 can extend out of the through groove 18 in the natural state of the rolling wheel 15. Preferably, the rolling wheels 15 are provided in several numbers along the length of the pressing groove 9.
When the radome blank 1 laterally slides into the compacting groove 9, the compacting plates 11 are in a compressed state, and the rolling wheels 15 are in a natural state, so that the rolling wheels 15 can provide support and rolling pairs for the sliding of the radome blank 1, and the sliding of the radome blank 1 is smoother and more reliable. In addition, the rolling wheel 15 can play a role in rolling the barrier layer 2, so that the barrier layer 2 and the radome blank 1 are tightly attached, and the bonding effect of the barrier layer 2 and the radome blank 1 is further improved.
For example, the first locking member 13 and the second locking member 16 are both electromagnets, and the electromagnets are energized to generate magnetic force to attract the whole rolling wheel 15 or the pressing plate 11 to move away from the radome blank 1. In addition, a contact switch 17 is also arranged on the positioning surface of the pressing block 8.
Thus, the radome blank 1 drilling operation of the present disclosure may have the following process:
in the initial state, the first locking piece 13 is electrified, the second locking piece 16 is powered off, the compacting plate 11 is in a compressed state, and the rolling wheel 15 is in a natural state; then, the radome blank 1 is laterally slid into the compaction groove 9, the radome blank 1 is smoothly slid until the datum plane is attached to the positioning surface under the rolling guide of the rolling wheel 15, and the rolling wheel 15 rolls the barrier layer 2; subsequently, the contact switch 17 is pressed, and the first locking piece 13 is further controlled to be powered off, and at the moment, the pressing plate 11 is restored to a natural state and pressed on the barrier layer 2 on the radome blank 1; finally, the drill bit of the drilling machine 7 drills the positioning hole 4 on the radome blank 1 through the first auxiliary hole 10 and the second auxiliary hole 12. And under the compaction laminating of the compaction plate 11, the condition that the abnormal fracture of the barrier layer 2 exceeds the range of the positioning hole 4 is difficult to appear.
Preferably, when the contact switch 17 is pressed, the second locking member 16 is also controlled to be energized, and the rolling wheel 15 is in a compressed state as a whole, and is separated from contact with the radome blank 1.
For example, an elastic layer (not shown) is disposed on the outer periphery of the rolling wheel 15, and the elastic layer may be preferably a rubber sleeve, where the rubber sleeve is soft and is not easy to damage the barrier layer 2.
The foregoing is merely a preferred embodiment of the invention, and it is to be understood that the invention is not limited to the form disclosed herein but is not to be construed as excluding other embodiments, but is capable of numerous other combinations, modifications and environments and is capable of modifications within the scope of the inventive concept, either as taught or as a matter of routine skill or knowledge in the relevant art. And that modifications and variations which do not depart from the spirit and scope of the invention are intended to be within the scope of the appended claims.
Claims (10)
1. A preparation method of a high-temperature-resistant radome is characterized by comprising the following steps: the method comprises the following steps:
s1, mixing a polyimide solution and a phthalonitrile resin solution, wherein the mass ratio of the polyimide solution to the phthalonitrile resin solution is 1:1-1:3; diluting the mixed solution, and adding a certain amount of solvent into the mixed resin solution to ensure that the solid content is 25-40%; wherein the Tg of the polyimide is more than or equal to 350 ℃, and the Tg of the phthalonitrile resin is more than or equal to 400 ℃; then, the quartz reinforced fiber and the high-temperature mixed resin glue solution are immersed to obtain a premix, wherein the mass ratio of the quartz reinforced fiber to the high-temperature mixed resin glue solution is 5:1-1.5:1;
s2, curing and forming the premix through curing equipment, so as to obtain a radome blank (1);
s3, bonding a barrier layer (2) on the outer periphery side of the radome blank (1), wherein the barrier layer (2) comprises copper foil or aluminum foil;
s4, machining the radome blank (1) obtained in the S2, so as to obtain a radome product, wherein the machining comprises machining a positioning hole (4) required by the radome product through a drilling device (3), the drilling device (3) comprises a pressing piece (5), and the pressing piece (5) can be pressed on the outer peripheral side of the radome blank (1) so as to keep the barrier layer (2) in flat fit with the outer peripheral side of the radome blank (1) during drilling.
2. The method for manufacturing the high-temperature resistant radome of claim 1, wherein the method comprises the following steps: the thickness of the barrier layer (2) is 0.15-0.35mm.
3. The method for manufacturing the high-temperature resistant radome of claim 1, wherein the method comprises the following steps: and in the step S2, the premix is added into a die for pressure curing, wherein the curing process is that the heating rate is 15-25 ℃/h, the pressurizing temperature is 220-230 ℃, the curing temperature is 350-370 ℃, the heat preservation is carried out for 1.2-2h, the pressure is 0.8-1.2MPa, and the vacuum gauge pressure is less than or equal to-0.097 MPa.
4. The method for manufacturing the high-temperature resistant radome of claim 1, wherein the method comprises the following steps: drilling equipment (3) still include mount table (6), be provided with drilling machine (7) on mount table (6), compress tightly piece (5) including supporting compress tightly piece (8) on mount table (6), set up compact slot (9) that agree with antenna housing blank (1) appearance on the lateral wall of compress tightly piece (8), still run through on compress tightly piece (8) and be provided with first auxiliary hole (10), first auxiliary hole (10) are relative with the hole site of antenna housing blank (1) presets locating hole (4).
5. The method for manufacturing the high-temperature resistant radome of claim 4, wherein the method comprises the following steps: the drilling machine (7) is a multi-shaft drilling machine (7).
6. The method for manufacturing the high-temperature resistant radome of claim 4, wherein the method comprises the following steps: the compressing groove (9) is provided with a compressing plate (11) in a bouncing way around the compressing surface on the outer periphery side of the radome blank (1), a second auxiliary hole (12) opposite to the first auxiliary hole (10) is formed in the compressing plate (11) in the upper and lower positions, a first locking piece (13) is further arranged on the compressing block (8), and the first locking piece (13) can drive the compressing plate (11) to move away from one side of the radome blank (1).
7. The method for manufacturing the high-temperature resistant radome of claim 6, wherein the method comprises the following steps: the compressing groove (9) is provided with a mounting groove (14) around the compressing surface on the outer periphery side of the radome blank (1), a rolling wheel (15) is arranged in the mounting groove (14) in a bouncing way, a second locking piece (16) is also arranged in the mounting groove (14), and the second locking piece (16) can drive the rolling wheel (15) to integrally move away from one side of the radome blank (1);
the compaction plate (11) is provided with a through groove (18), the through groove (18) is opposite to the rolling wheel (15), and in a natural state, the rolling wheel (15) extends out of the through groove (18).
8. The method for manufacturing the high-temperature resistant radome of claim 7, wherein the method comprises the following steps: the first locking piece (13) and the second locking piece (16) are electromagnets, and the electromagnets are electrified to generate magnetic force and adsorb the whole rolling wheel (15) or the side of the compacting plate (11) away from the radome blank (1) to move.
9. The method for manufacturing the high-temperature resistant radome of claim 6, wherein the method comprises the following steps: an elastic layer is arranged on the outer periphery of the rolling wheel (15).
10. The method for manufacturing the high-temperature resistant radome of claim 8, wherein the method comprises the following steps: the end face of the pressing groove (9) is a positioning surface, and a contact switch (17) is arranged on the positioning surface;
in an initial state, the first locking piece (13) is electrified, the second locking piece (16) is powered off, and the rolling wheel (15) extends out of the through groove (18); when the reference surface of the radome blank (1) is attached to the positioning surface, the contact switch (17) is pressed, then the first locking piece (13) is controlled to be powered off, and the pressing plate (11) is pressed on the barrier layer (2) on the radome blank (1) in a natural state.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311314001.9A CN117103724A (en) | 2023-10-11 | 2023-10-11 | Preparation method of high-temperature-resistant radome |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311314001.9A CN117103724A (en) | 2023-10-11 | 2023-10-11 | Preparation method of high-temperature-resistant radome |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117103724A true CN117103724A (en) | 2023-11-24 |
Family
ID=88796699
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311314001.9A Pending CN117103724A (en) | 2023-10-11 | 2023-10-11 | Preparation method of high-temperature-resistant radome |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117103724A (en) |
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2023
- 2023-10-11 CN CN202311314001.9A patent/CN117103724A/en active Pending
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