Assembling tool and assembling method for ceramic antenna window and heat insulation layer

Abstract

The invention designs a method for assembling a ceramic antenna window and a heat insulation layer. The method comprises the following steps: S1, carrying out surface roughening treatment on a bonding surface of the antenna window; s2, brushing the bonding surface of the antenna window with concentrated ammonia water or concentrated sulfuric acid, and then carrying out first heating treatment; s3, the bonding surface of the antenna window is coated with alumina sol, and a gradient transition layer is formed after placement; s4, the gradient transition layer is coated with a high-temperature wave-transparent adhesive; s5, a high-temperature-resistant anti-adhesive coating is sprayed on the positioning tool for secondary heating treatment, and the antenna window and the heat insulation layer are assembled through the positioning tool; and S6, the antenna window, the heat insulation layer and the positioning tool are heated for the third time. According to the adhesive, the wettability of the adhesive and the bonding surface of the antenna window can be improved, the adhesive reacts with alumina sol to generate a three-dimensional net structure, the bonding strength between the adhesive and the bonding layer and the thermal insulation layer of the antenna window is improved, meanwhile, high-temperature thermal shock can be relieved, and the purposes of low-temperature forming and high-temperature use can be achieved.

Description

Technical Field

[0001] The invention belongs to the field of ceramic antenna window assembly, and in particular relates to an assembly tool and an assembly method for a ceramic antenna window and a heat insulation layer. Background Art

[0002] At present, an infrared detection window is installed on the ceramic antenna cover of the head of aerospace missile aircraft, and an antenna cover plate made of the same material as the antenna cover is usually used as the detection window. In recent years, with the development of the aerospace industry, ceramic antenna covers have developed towards thin-walled special-shaped structures. The outer surface of the antenna cover is mostly a waverider with a complex special-shaped surface or a revolving body of the Karman curve. Therefore, the ceramic antenna window matched with it is designed as a thin-walled curved surface structure to match the antenna cover profile.

[0003] During the high-speed flight of the aircraft, in order to protect the antenna inside the radome from the high temperature generated by high Mach flight, a low-density rigid or flexible thermal insulation layer is used to connect and assemble the inside of the antenna window to block the transfer of heat during the flight, thereby protecting the internal antenna structure. Therefore, the connection and assembly of the ceramic antenna window and the thermal insulation layer becomes the key to solving this technical problem.

[0004] The main problems currently exist are the risks of dimensional accuracy and reliability of bonding when connecting and assembling the thin-walled curved ceramic antenna window and the thermal insulation layer. Since the ceramic antenna window and the thermal insulation layer are in curved contact and there are no fixed dimensional fixing points around, it is not easy to meet the dimensional accuracy requirements during the assembly process. At the same time, the connection and assembly between the ceramic antenna window and the thermal insulation layer are not firm, and the connection strength is not high, which cannot meet the vibration caused by the sharp fluctuations of airflow during flight, which will cause the thermal insulation layer and the antenna window to loosen, separate, and fall off.

[0005] To this end, our company has developed an assembly tool and assembly method for ceramic antenna windows and thermal insulation layers, which can improve the assembly accuracy and connection strength of the antenna windows and thermal insulation layers. Summary of the invention

[0006] The present invention designs a method for assembling a ceramic antenna window and a thermal insulation layer, comprising the following steps: S1: performing a surface roughening treatment on a bonding surface of the antenna window; S2: applying concentrated ammonia water or concentrated sulfuric acid to the bonding surface of the antenna window, and then performing a first heating treatment; S3: applying alumina sol to the bonding surface of the antenna window, and forming a gradient transition layer after placement; S4: applying a high-temperature wave-transmitting adhesive to the gradient transition layer; S5: spraying a high-temperature resistant anti-adhesive coating on a positioning tool for a second heating treatment, and assembling the antenna window and the thermal insulation layer through a positioning tool after the second heating treatment; S6: performing a third heating treatment on the antenna window, the thermal insulation layer and the positioning tool, and removing the antenna window and the thermal insulation layer after the third heating treatment is completed; S7: performing an edge sealing treatment on the periphery of the high-temperature wave-transmitting adhesive between the antenna window and the thermal insulation layer.

[0007] Compared with the prior art, the beneficial effects of the present invention are as follows: by roughening the bonding surface of the antenna window, the roughness of the bonding surface can be increased, thereby improving the adhesive bonding; by brushing the bonding surface of the antenna window with concentrated ammonia water or concentrated sulfuric acid, the hydrophobic layer of the bonding surface of the ceramic antenna window can be destroyed, and the wettability between the high-temperature wave-transmitting adhesive and the bonding surface of the antenna window can be improved, thereby improving the adhesive bonding strength; by brushing alumina sol onto the bonding surface of the antenna window, a gradient transition layer is formed on the bonding surface of the antenna window, and the high-temperature wave-transmitting adhesive can react with the alumina sol to generate a three-dimensional network structure, which can increase the bonding cotton knots and improve the limited connection between the adhesive and the bonding layer and the thermal insulation layer of the antenna window. The thickness of the adhesive layer between the antenna window and the thermal insulation layer can be controlled within the range of (0.15-0.25) mm through the positioning tooling. At the same time, the thermal insulation layer is located in the center of the antenna window, and the position deviation can be controlled within the range of (0.05-0.10) mm. By edge sealing the high-temperature wave-transmitting adhesive, the high-temperature wave-transmitting adhesive can be protected from moisture, which can further enhance the bonding strength between the thermal insulation layer and the antenna window.

[0008] Furthermore, the concentration of the concentrated ammonia water in S2 is 25%-28%, the concentration of the concentrated sulfuric acid is 98%, the first heating treatment temperature is 100° C.-120° C., and the first heating treatment time is 20 min-40 min.

[0009] The beneficial effect of adopting the above further technical solution is that by using a high concentration of alkaline or acidic solvent to destroy the hydrophobic layer on the bonding surface of the ceramic antenna window substrate, the wettability of the water-based high-temperature resistant and wave-transparent adhesive to the substrate is improved, thereby improving the adhesive bonding strength.

[0010] Furthermore, the concentration of aluminum oxide in the S3 is 10%, and the placement time is 20h-24h.

[0011] The beneficial effect of adopting the above-mentioned further technical scheme is that by using a certain concentration of aluminum solution to penetrate into the bonding surface of the antenna window, a gradient transition layer is formed on the bonding surface, which can make the phosphate adhesive react with the aluminum sol in the gradient transition layer to form a three-dimensional network structure, increase the bonding area, and improve the limited connection and bonding strength between the adhesive and the ceramic antenna window and the insulation layer. At the same time, it can alleviate high-temperature thermal shock and achieve the purpose of low-temperature molding and high-temperature use.

[0012] Furthermore, the high temperature wave-transmitting adhesive in S4 includes a phosphate resin and a curing agent, and the mass ratio of the phosphate resin to the curing agent is 1:(1-1.5).

[0013] Furthermore, the main component of the phosphate resin is aluminum magnesium dihydrogen phosphate, and the main components of the curing agent are aluminum oxide, magnesium oxide and a sustained-release agent; the sustained-release agent is a compound containing trace amounts of chromium.

[0014] The beneficial effect of adopting the above-mentioned further technical scheme is that: the bonding strength of the adhesive can be improved by using the phosphate resin whose main component is aluminum magnesium dihydrogen phosphate. The interface bonding strength of the phosphate resin is jointly exerted by physical bonding, chemical bonding and mechanical bonding, which can improve the physical and chemical properties of the bonding material, and can make the adhesive have high temperature resistance. At the same time, it has the effect of low dielectric, which can avoid the problem of poor wave transmittance of the antenna window. The high temperature resistance and corrosion resistance of the adhesive can be improved, and the strength and toughness can be improved by adding aluminum oxide. The viscosity of the adhesive can be improved by adding magnesium oxide. The stability of the adhesive can be improved by adding a sustained-release agent. A trace amount of chromium-containing compounds can reduce the corrosion of weakly acidic phosphates to metals, so that the bonding strength of the adhesive can be maintained for a longer time.

[0015] Furthermore, the high temperature resistant anti-adhesive coating in S5 is a waterproof silicone coating, and the waterproof silicone coating includes hard flexible silicone and anhydrous ethanol, and the mass ratio of the hard flexible silicone and anhydrous ethanol is: 1:(1-2), the second heating treatment temperature is 100℃-120℃, and the second heating treatment time is 1h-2h.

[0016] The beneficial effect of adopting the above further technical solution is that the waterproof silicone coating is prepared by hard flexible silicone and anhydrous ethanol, so that the surface of the positioning tooling can have high temperature resistance and anti-adhesive properties.

[0017] Furthermore, the temperature of the third heating treatment in S6 is increased from 3°C / min-5°C / min to 80°C / min-100°C / min, kept for 1h-2h, and then dropped to room temperature.

[0018] The beneficial effect of adopting the above-mentioned further technical scheme is: by heating the antenna window and the thermal insulation layer installed on the positioning tooling for a third time, the antenna window and the thermal insulation layer are cured together under the action of the adhesive, and the phosphate adhesive exists as amorphous phosphate after being cured at room temperature. The interface bonding strength of the phosphate adhesive is jointly exerted by physical bonding, mechanical bonding and chemical bonding, which can enhance the bonding force between the phosphate adhesive and the bonded material; the product of the phosphate adhesive after high temperature is aluminum phosphate, which can reduce the dielectric constant of the adhesive, increase the wave transmittance of the antenna cover window, and enhance the heat insulation performance of the antenna window and the thermal insulation layer.

[0019] Furthermore, the edge sealing process in S7 is to apply silicone rubber to the periphery of the high-temperature wave-transmitting adhesive between the antenna window and the heat insulation layer, and place the silicone rubber at room temperature for 48 hours to 72 hours after application.

[0020] The beneficial effect of adopting the above-mentioned further technical scheme is that by applying silicone rubber around the periphery of the high-temperature wave-transmitting adhesive, it is possible to avoid moisture absorption during long-term storage caused by the high porosity of the high-temperature wave-transmitting adhesive, and to avoid the problem of the electrical properties of the high-temperature wave-transmitting adhesive being reduced due to moisture absorption. The bonding performance of the high-temperature wave-transmitting adhesive can be improved, and while being resistant to high temperatures, it can also assist in enhancing the bonding strength between the thermal insulation layer and the antenna window.

[0021] A tool for assembling a ceramic antenna window and a heat insulation layer, comprising a base, a heat insulation layer placement platform and an antenna window positioning clamping plate are arranged on the base, the antenna window positioning clamping plate is arranged on both sides of the heat insulation layer placement platform, the antenna window positioning clamping plate comprises a clamping plate 1 and a clamping plate 2, the clamping plate 2 is arranged on both sides of the clamping plate 1, the height of the clamping plate 1 is higher than the height of the heat insulation layer placement platform, and the height of the clamping plate 2 is higher than the height of the clamping plate 1;

[0022] Preferably, a gap is provided between the holding plate 1 and the heat insulation layer placement platform, a glue overflow groove is provided around the heat insulation layer placement platform, the gap is connected to the glue overflow groove, and a glue discharge port is provided on the glue overflow groove;

[0023] More preferably, the upper side surface of the heat insulation layer placement platform is a curved surface, and the curved surface of the heat insulation layer placement platform matches the surface shape of the heat insulation layer;

[0024] More preferably, a plurality of positioning clips are arranged on the insulation layer placement platform, the height of the positioning clips is less than the thickness of the insulation layer, the height of the positioning clips is lower than the height of the holding plate 1, and the positioning clips are located on the peripheral side of the insulation layer placement platform.

[0025] The beneficial effect of adopting the above-mentioned further technical scheme is that: a heat insulation layer placement platform is arranged on the base to place the heat insulation layer thereon, and then the antenna window is clamped onto the heat insulation layer through the antenna window clamping plate, and the antenna window is clamped by clamping plate one and clamping plate two, the height of clamping plate one is higher than the heat insulation layer placement platform, and the heat insulation layer can be placed on the heat insulation layer placement platform, and the side of the antenna window is clamped by clamping plate one, and the height of clamping plate two is higher than the height of clamping plate one, so that the side of the antenna window is clamped by clamping plate two again, thereby improving the dimensional accuracy of the antenna window and the heat insulation layer during the assembly process, and making the antenna window and the heat insulation layer The assembly is firm and the connection strength is high; by arranging overflow grooves around the thermal insulation layer placement table, during the shaping process of the antenna window and the thermal insulation layer, the adhesive is allowed to flow into the overflow grooves to avoid the adhesive accumulating at the edge where the antenna window and the thermal insulation layer are connected, and the thickness of the adhesive between the antenna window and the thermal insulation layer can be controlled; by setting the upper side surface of the thermal insulation layer placement table as a curved surface, the thermal insulation layer can be more closely fitted to the curved surface shape, thereby improving the assembly accuracy of the thermal insulation layer and the antenna window; by arranging a plurality of positioning clips on the thermal insulation layer placement table, the positioning clips can be used to position the thermal insulation layer to avoid the thermal insulation layer from being offset during the assembly process.

[0026] Furthermore, a clamping platform is also provided on the base, and the clamping platform is located on both sides of the insulation layer placement platform that are perpendicular to clamping component 1 and clamping component 2. The clamping platform includes step 1 and step 2, and the height of step 1 is equal to the height of clamping component 1, and the height of step 2 is higher than the height of clamping component 1.

[0027] The beneficial effect of adopting the above further technical solution is that: by arranging a clamping platform on the base, the side of the antenna window is clamped by step one, and the side of the antenna window is clamped again by step two.

[0028] Furthermore, a clamping adjustment device is provided on the base, and the clamping adjustment device includes an adjustment rod, and a clamping block is threadedly connected to the adjustment rod, and the clamping block is arranged on the upper side of the insulation layer placement platform.

[0029] The beneficial effect of adopting the above further technical solution is that by arranging a compression adjustment device on the base, the compression block can be adjusted to press the thermal insulation layer downward, and the thickness between the thermal insulation layer and the antenna window can be controlled. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 The structure of the assembly tool for the ceramic antenna window and the heat insulation layer of the present invention is schematically shown. Figure 1 ;

[0031] Figure 2 The structure of the assembly tool for the ceramic antenna window and the heat insulation layer of the present invention is schematically shown. Figure 2 ;

[0032] Figure 3 It is a structural schematic diagram of the assembly of the ceramic antenna window and the heat insulation layer of the present invention;

[0033] 1. Base; 2. Insulation layer placement table; 21. Positioning clamp; 3. Antenna window positioning clamp plate; 31. Clamp plate one; 32. Clamp plate two; 4. Glue overflow groove; 41. Glue discharge port; 5. Clamp platform; 51. Step one; 52. Step two; 6. Pressing adjustment device; 61. Adjusting rod; 62. Pressing block; 7. Insulation layer; 8. Antenna window. DETAILED DESCRIPTION

[0034] In order to make the objectives, technical solutions and advantages of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention.

[0035] Embodiment 1:

[0036] The present embodiment provides an assembly tool and an assembly method for a ceramic antenna window and a heat insulation layer, comprising the following steps: S1: roughening the bonding surface of the antenna window 8; S2: applying concentrated ammonia water or concentrated sulfuric acid to the bonding surface of the antenna window, and then performing a first heating treatment; S3: applying alumina sol to the bonding surface of the antenna window, and forming a gradient transition layer after placement; S4: applying a high-temperature wave-transmitting adhesive to the gradient transition layer; S5: spraying a high-temperature resistant anti-adhesive coating on the positioning tool and performing a second heating treatment, and after the second heating treatment, assembling the antenna window 8 and the heat insulation layer 7 through the positioning tool; S6: performing a third heating treatment on the antenna window 8, the heat insulation layer 7 and the positioning tool, and removing the antenna window 8 and the heat insulation layer 7 after the third heating treatment. S7: performing an edge sealing treatment on the periphery of the high-temperature wave-transmitting adhesive between the antenna window (8) and the heat insulation layer (7).

[0037] By roughening the bonding surface of the antenna window 8, the roughness of the bonding surface can be increased, thereby improving the adhesive bonding; by brushing the bonding surface of the antenna window with concentrated ammonia or concentrated sulfuric acid, the hydrophobic layer of the bonding surface of the ceramic antenna window 8 can be destroyed, and the wettability between the high-temperature wave-transmitting adhesive and the bonding surface of the antenna window 8 can be improved, thereby improving the adhesive bonding strength; by brushing alumina sol onto the bonding surface of the antenna window 8, a gradient transition layer is formed on the bonding surface of the antenna window 8, and the high-temperature wave-transmitting adhesive can react with the alumina sol to generate a three-dimensional mesh structure, which can increase the bonding knots and improve the adhesive strength. The limited connection and bonding strength between the adhesive and the antenna window 8 bonding layer and the thermal insulation layer 7 can be improved, and at the same time, high-temperature thermal shock can be alleviated to achieve the purpose of low-temperature molding and high-temperature use; spraying a high-temperature resistant anti-adhesive coating on the positioning tooling can prevent the positioning tooling from any color difference changes at high temperatures for a long time, and at the same time prevent the glue from sticking to the tooling surface; the positioning tooling can control the thickness of the adhesive layer between the antenna window 8 and the thermal insulation layer 7 to be within the range of (0.15-0.25) mm, and at the same time, the thermal insulation layer 7 is located in the central position of the antenna window 8, and the position deviation can be controlled within the range of (0.05-0.10) mm.

[0038] The concentration of the concentrated ammonia in S2 is 25%-28%, the concentration of the concentrated sulfuric acid is 98%, the first heating treatment temperature is 100°C-120°C, and the first heating treatment time is 20min-40min. By using a high concentration of alkaline or acidic solvent to destroy the hydrophobic layer on the bonding surface of the ceramic antenna window 8 substrate, the wettability of the water-based high temperature resistant wave-transmitting adhesive and the substrate is improved, thereby improving the adhesive bonding strength.

[0039] The concentration of aluminum oxide in S3 is 10%, and the placement time is 20h-24h. By using a concentrated aluminum solution to penetrate the bonding surface of the antenna window 8, a gradient transition layer is formed on the bonding surface, which can make the phosphate adhesive react with the aluminum sol in the gradient transition layer to form a three-dimensional network structure, increase the bonding area, and improve the limited connection and bonding strength between the adhesive and the ceramic antenna window 8 and the thermal insulation layer 7. At the same time, it can alleviate high-temperature thermal shock and achieve the purpose of low-temperature molding and high-temperature use.

[0040] The S4 medium- and high-temperature wave-transmitting adhesive comprises a phosphate resin and a curing agent, and the mass ratio of the phosphate resin to the curing agent is 1:(1-1.5). The main component of the phosphate resin is aluminum magnesium dihydrogen phosphate, and the main components of the curing agent are aluminum oxide, magnesium oxide and a sustained-release agent. The main component of the phosphate resin is aluminum magnesium dihydrogen phosphate, which can improve the bonding strength of the adhesive and make the adhesive have high temperature resistance. The addition of aluminum oxide can improve the high temperature resistance, corrosion resistance, strength and toughness of the adhesive. The addition of magnesium oxide can improve the viscosity of the adhesive. The addition of a sustained-release agent can improve the stability of the adhesive.

[0041] The high temperature resistant anti-adhesive coating in S5 is a waterproof organic silicon coating, which includes hard flexible organic silicon and anhydrous ethanol, wherein the mass ratio of the hard flexible organic silicon to the anhydrous ethanol is 1:(1-2), the second heating treatment temperature is 100°C-120°C, and the second heating treatment time is 1h-2h. The waterproof organic silicon coating is prepared by hard flexible organic silicon and anhydrous ethanol, so that the surface of the positioning tool has high temperature resistance and anti-adhesive properties.

[0042] The temperature of the third heating treatment in S6 is raised from 3°C / min-5°C / min to 80°C / min-100°C / min, and kept at room temperature for 1h-2h before returning to room temperature. The antenna window 8 and the heat insulation layer 7 installed on the positioning tool are heated for the third time, so that the antenna window 8 and the heat insulation layer 7 are cured together under the action of the adhesive.

[0043] The edge sealing process in S7 is to apply silicone rubber to the periphery of the high-temperature wave-transmitting adhesive between the antenna window and the heat-insulating layer, and place the silicone rubber at room temperature for 48h-72h after application. Applying silicone rubber to the periphery of the high-temperature wave-transmitting adhesive can avoid moisture absorption during long-term storage caused by excessive porosity of the high-temperature wave-transmitting adhesive, and prevent the high-temperature adhesive from absorbing moisture for a long time, resulting in reduced electrical properties and reduced bonding strength, and can improve the bonding properties of the high-temperature wave-transmitting adhesive. While being resistant to high temperatures, it can also help enhance the bonding strength between the heat-insulating layer and the antenna window.

[0044] A tool for assembling a ceramic antenna window and a heat insulation layer 7, comprising a base 1, on which a heat insulation layer placement platform 2 and an antenna window positioning clamping plate 3 are arranged, the antenna window positioning clamping plate 3 is arranged on both sides of the heat insulation layer placement platform 2, the antenna window positioning clamping plate 3 comprises a clamping plate 1 31 and a clamping plate 2 32, the clamping plate 2 32 is arranged on both sides of the clamping plate 1 31, the height of the clamping plate 1 31 is higher than the height of the heat insulation layer placement platform 2, the height of the clamping plate 2 32 is higher than the height of the clamping plate 1 31; preferably, a clamping plate 1 31 is arranged between the clamping plate 1 31 and the heat insulation layer placement platform 2 A gap is provided, and glue overflow grooves 4 are provided around the insulation layer placement platform 2, the gap is connected to the glue overflow groove 4, and a glue discharge port 41 is opened on the glue overflow groove 4; more preferably, the upper side surface of the insulation layer placement platform 2 is a curved surface, and the curved surface of the insulation layer placement platform 2 is consistent with the surface shape of the insulation layer 7; more preferably, a plurality of positioning clips 21 are provided on the insulation layer placement platform 2, the height of the positioning clips 21 is less than the thickness of the insulation layer 7, the height of the positioning clips 21 is lower than the height of the holding plate 31, and the positioning clips 21 are located on the surrounding side of the insulation layer placement platform 2. The heat insulation layer 7 is placed on the heat insulation layer placement platform 2 provided on the base 1, and then the antenna window 8 is clamped on the heat insulation layer 7 through the antenna window positioning clamping plate 3, and the antenna window 8 is clamped by the clamping plate 1 31 and the clamping plate 2 32. The height of the clamping plate 1 31 is higher than the heat insulation layer placement platform 2, so that the heat insulation layer 7 can be placed on the heat insulation layer placement platform 2, and the side of the antenna window 8 is clamped by the clamping plate 1 31. The height of the clamping plate 2 32 is higher than the height of the clamping plate 1 31, so that the clamping plate 2 32 clamps the side of the antenna window 8 again, thereby improving the dimensional accuracy of the antenna window 8 and the heat insulation layer 7 during the assembly process, so that the antenna window 8 and the heat insulation layer 7 are firmly assembled. The connection strength is high; by arranging overflow grooves 4 around the insulation layer placement platform 2, during the shaping process of the antenna window 8 and the insulation layer 7, the adhesive flows into the overflow grooves 4 to avoid the adhesive accumulating at the edge where the antenna window 8 and the insulation layer 7 are connected, and the thickness of the adhesive between the antenna window 8 and the insulation layer 7 can be controlled; by setting the upper side surface of the insulation layer 7 placement platform 2 as a curved surface, the insulation layer 7 can be more closely fitted to the curved surface shape, thereby improving the assembly accuracy of the insulation layer 7 and the antenna window 8; by arranging a plurality of positioning clips 21 on the insulation layer 7 placement platform 2, the positioning clips 21 can be used to position the insulation layer 7 to avoid the insulation layer 7 from being offset during the assembly process.

[0045] The base 1 is also provided with a clamping platform 5, which is located on both sides of the heat insulation layer placement platform 2 perpendicular to the clamping member 1 31 and the clamping member 2 32. The clamping platform 5 includes a step 1 51 and a step 2 52. The height of the step 1 51 is equal to the height of the clamping member 1 31, and the height of the step 2 52 is higher than the height of the clamping member 1 31. By providing the clamping platform 5 on the base 1, the step 1 51 clamps the side of the antenna window, and the step 2 52 clamps the side of the antenna window 8 again.

[0046] When the antenna window 8 is heated for the third time, a counterweight may be placed on it, thereby achieving compression of the antenna window 8 and the heat insulation layer 7;

[0047] The base 1 is provided with a pressing adjustment device 6, which includes an adjustment rod 61, and a pressing block 62 is threadedly connected to the adjustment rod 61, and the pressing block 62 is arranged on the upper side of the heat insulation layer placement platform 2. By providing the pressing adjustment device 6 on the base 1, the pressing block 62 can be adjusted to press the heat insulation layer 7 downward, and the thickness between the heat insulation layer 7 and the antenna window 8 can be controlled.

[0048] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them; based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention. Although the present invention has been described in detail with reference to the above embodiments, ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the above embodiments, or replace some of the technical features therein by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A method for assembling a ceramic antenna window and a heat insulation layer, characterized in that: The following steps are involved: S1: performing a surface roughening treatment on the bonding surface of the antenna window (8); S2: brushing concentrated ammonia water or concentrated sulfuric acid onto the bonding surface of the antenna window (8), and then performing a first heating treatment; S3: brushing alumina sol onto the bonding surface of the antenna window (8), and forming a gradient transition layer after being left thereon; S4: Apply high temperature wave-transmitting adhesive to the gradient transition layer; S5: spraying a high-temperature resistant anti-adhesive coating on the positioning fixture for a second heating treatment, and after the second heating treatment, assembling the antenna window (8) and the thermal insulation layer (7) through the positioning fixture; S6: performing a third heating treatment on the antenna window (8), the thermal insulation layer (7) and the positioning fixture, and after the third heating treatment, removing the antenna window (8) and the thermal insulation layer (7); S7: performing edge sealing treatment on the periphery of the high-temperature wave-transmitting adhesive between the antenna window (8) and the thermal insulation layer (7).

2. The method for assembling a ceramic antenna window and a heat insulation layer according to claim 1, characterized in that: The concentration of the concentrated ammonia water in S2 is 25%-28%, the concentration of the concentrated sulfuric acid is 98%, the first heating treatment temperature is 100° C.-120° C., and the first heating treatment time is 20 min-40 min.

3. The method for assembling a ceramic antenna window and a heat insulation layer according to claim 1, characterized in that: The concentration of aluminum oxide in the S3 is 10%, and the placement time is 20h-24h.

4. The method for assembling a ceramic antenna window and a heat insulation layer according to claim 1, characterized in that: The high temperature wave-transmitting adhesive in S4 comprises a phosphate resin and a curing agent, wherein the mass ratio of the phosphate resin to the curing agent is 1:(1-1.5); the main component of the phosphate resin is aluminum magnesium dihydrogen phosphate, and the main components of the curing agent are aluminum oxide, magnesium oxide and a sustained-release agent; The sustained-release agent is a compound containing trace amounts of chromium.

5. The method for assembling a ceramic antenna window and a heat insulation layer according to claim 1, characterized in that: The high temperature resistant anti-adhesive coating in S5 is a waterproof silicone coating, which includes hard flexible silicone and anhydrous ethanol. The mass ratio of the hard flexible silicone and anhydrous ethanol is: 1:(1-2). The second heating treatment temperature is 100°C-120°C, and the second heating treatment time is 1h-2h.

6. The method for assembling a ceramic antenna window and a heat insulation layer according to claim 1, characterized in that: The temperature of the third heating treatment in S6 is raised from 3°C / min-5°C / min to 80°C / min-100°C / min, and then kept at this temperature for 1h-2h before returning to room temperature.

7. The method for assembling a ceramic antenna window and a heat insulation layer according to claim 1, characterized in that: The edge sealing process in S7 is to apply silicone rubber to the periphery of the high-temperature wave-transmitting adhesive between the antenna window (8) and the heat insulation layer (7), and place the silicone rubber at room temperature for 48 hours to 72 hours after application.

8. The assembly tool for the ceramic antenna window and the heat insulation layer according to any one of claims 1 to 7, characterized in that: The invention comprises a base (1), on which a heat insulation layer placement platform (2) and an antenna window positioning clamping plate (3) are arranged, wherein the antenna window positioning clamping plate (3) is arranged on both sides of the heat insulation layer placement platform (2), and the antenna window positioning clamping plate (3) comprises a clamping plate 1 (31) and a clamping plate 2 (32), wherein the clamping plate 1 (31) is arranged on both sides of the heat insulation layer placement platform (2), and the clamping plate 2 (32) is arranged on both sides of the clamping plate 1 (31), wherein the height of the clamping plate 1 (31) is higher than the height of the heat insulation layer placement platform (2), and the height of the clamping plate 2 (32) is higher than the height of the clamping plate 1 (31); Preferably, a gap is provided between the holding plate 1 (31) and the heat insulation layer placement platform (2), a glue overflow groove (4) is provided around the heat insulation layer placement platform (2), the gap is connected to the glue overflow groove (4), and a glue discharge port (41) is provided on the glue overflow groove (4); More preferably, the upper side surface of the heat insulation layer placement platform (2) is a curved surface, and the curved surface of the heat insulation layer placement platform (2) matches the surface shape of the heat insulation layer (7); More preferably, a plurality of positioning clips (21) are provided on the thermal insulation layer placement platform (2), the height of the positioning clips (21) is less than the thickness of the thermal insulation layer (7), the height of the positioning clips (21) is lower than the height of the holding plate (31), and the positioning clips (21) are located on the peripheral side of the thermal insulation layer placement platform (2).

9. The assembly tool for the ceramic antenna window and the heat insulation layer according to claim 8, characterized in that: The base (1) is also provided with a holding platform (5), the holding platform (5) being located on two sides of the heat insulation layer placement platform (2) perpendicular to the holding plate 1 (31) and the holding plate 2 (32), the holding platform (5) comprising a step 1 (51) and a step 2 (52), the height of the step 1 (51) being equal to the height of the holding plate 1 (31), and the height of the step 2 (52) being higher than the height of the holding plate 1 (31).

10. The assembly tool for the ceramic antenna window and the heat insulation layer according to claim 8, characterized in that: The base (1) is provided with a clamping adjustment device (6), the clamping adjustment device (6) comprising an adjustment rod (61), a clamping block (62) being threadedly connected to the adjustment rod (61), and the clamping block (62) is arranged on the upper side of the heat insulation layer placement platform (2).

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