Glue joint tool for common bottom of thermal insulation interlayer of carrier rocket storage tank

Abstract

The utility model provides a glue joint tool for a carrier rocket storage tank heat insulation interlayer common bottom, and belongs to the field of glue joint, the glue joint tool comprises an upper pressing ring and a lower tool, the middle of the surface of the side, facing the upper pressing ring, of the lower tool is a supporting surface, and the shape of the supporting surface is matched with that of a lower panel; a glue injection ring groove is formed in the surface of the side, facing the upper pressing ring, of the lower tool, a lower installation ring groove is formed in the bottom of the glue injection ring groove, the lower installation ring groove is located in the outer side edge of the supporting surface, and the edge of the lower panel is installed in the lower installation ring groove. According to the method provided by the invention, large vacuum tank equipment is not needed for cementing operation, the cementing defect of the product can be effectively reduced, the production process is simplified, the efficiency is high, the process applicability is high, and the cost is low.

Description

Technical Field

[0001] This application relates to the field of bonding, and specifically, to a bonding tool applicable to the common bottom of the heat insulation interlayer of a launch vehicle tank. In particular, it relates to a common bottom bonding method for a large-diameter thin-walled panel heat insulation sandwich with a large temperature difference heat insulation tank. Background Art

[0002] The common bottom of a thin-walled panel heat insulation sandwich tank is an important component of a rocket large temperature difference heat insulation common bottom tank. The mainstream structural form is a relatively large-diameter semi-ellipsoidal rotating body made of a thin-walled metal panel / heat insulation core material structure. The structure needs to withstand double-sided pressure under a large temperature difference of 200 degrees up and down between liquid oxygen and kerosene or the temperature difference between liquid oxygen and methane. Therefore, the requirements for controlling bonding defects in the sandwich structure are extremely strict.

[0003] The main problem that common bonding process methods need to solve is the problem of discharging air bubbles inside the large-diameter bonding surface. Generally, the vacuum infusion method is used to inject the resin adhesive into the bonding surface through the injection hole, and then the upper and lower panels are pressed together through the pressing process. Conventional solutions all have the problems of complex bonding process flow and the need to use complex equipment such as vacuum tanks, resulting in too high product costs.

[0004] After searching the existing technical patent literature, it is found that the Chinese invention patent publication number is CN113619132A, which discloses a common bottom bonding method and a heat insulation tank applicable to a panel foam sandwich heat insulation tank, belonging to the common bottom bonding method of a panel foam sandwich heat insulation tank. The double vacuum closing of the product is carried out using a vacuum bag and a vacuum hood. After brushing the glue at the bonding interface, the air between the bonding surfaces is first discharged, and then the panels are closed by the controllable double vacuum pressure inside and outside the product. The cost is high and the operation is troublesome. Due to the existence of the vacuum bag and the vacuum hood, the control process is complex. Utility Model Content

[0005] The technical problem solved by this application is: overcoming the deficiencies of the prior art, providing a bonding tool for the common bottom of the heat insulation interlayer of a launch vehicle tank. Using a special tool to bond the common bottom of the heat insulation interlayer of a launch vehicle tank, the product is injected with glue by the methods of vacuum pumping and liquid column connection, and then the residual air is removed by the methods of vibration excitation and liquid column pressure. The method provided by this application does not require the use of large vacuum tank equipment for bonding operations, can effectively reduce product bonding defects, simplify the production process, has high efficiency, strong process applicability, and low cost.

[0006] This application does not require complex equipment such as vacuum bags and vacuum hoods. The product is injected with glue by the methods of vacuum pumping and liquid column connection, and then the residual air is removed by the methods of vibration excitation and liquid column pressure. The product bonding process is simple and efficient, and after bonding, it can ensure that there are no air bubble defects on the bonding surface.

[0007] The technical solution provided by this application is as follows:

[0008] An adhesive tooling for the common bottom of the heat insulation interlayer of a launch vehicle tank, which is used for the adhesion of the common bottom of the heat insulation interlayer of a launch vehicle tank. The common bottom of the heat insulation interlayer of a launch vehicle tank includes an upper panel, a heat insulation core material, and a lower panel arranged in sequence;

[0009] The adhesive tooling includes an upper pressing ring and a lower tooling. The middle part of the surface of the lower tooling facing the upper pressing ring is a supporting surface, and the shape of the supporting surface matches the shape of the lower panel. A glue injection ring groove is arranged on the surface of the lower tooling facing the upper pressing ring, and a lower installation ring groove is arranged at the bottom of the glue injection ring groove. The lower installation ring groove is located at the outer edge of the supporting surface, and the edge of the lower panel is installed in the lower installation ring groove; on the inner and outer circle positions of the surface of the upper pressing ring facing the lower tooling, an upper installation ring groove and an assembly ring groove are respectively opened. The edge of the upper panel cooperates with the upper installation ring groove, and the edge of the lower tooling cooperates with the assembly ring groove;

[0010] A glue injection space is formed among the upper panel, the lower panel, the upper pressing ring, and the lower tooling. The lower tooling is provided with a nozzle connecting the outside and the glue injection space. The nozzle is used to connect a vacuum pumping device, and the lower tooling is connected with a vibrator; the lower tooling is provided with a glue injection pipe, and a one-way valve is arranged on the glue injection pipe. The glue injection pipe is used to inject glue into the glue injection space; a top nozzle is arranged in the middle of the top of the upper panel.

[0011] It is characterized in that: the top nozzle is connected with a glue guiding pipe, and the outlet of the glue guiding pipe is higher than the top of the top nozzle.

[0012] A third sealing ring is arranged between the edge of the lower tooling and the bottom of the assembly ring groove of the upper pressing ring, a first sealing ring is arranged between the upper panel and the bottom of the upper installation ring groove of the upper pressing ring, and a second sealing ring is arranged between the lower panel and the bottom of the lower installation ring groove of the lower tooling.

[0013] A gap adjusting device is arranged in the glue injection space formed among the upper panel, the lower panel, the upper pressing ring, and the lower tooling. The gap adjusting device can extend into the spaces between the upper panel and the heat insulation core material, and between the heat insulation core material and the edge of the lower panel to adjust and fix the gaps between the upper panel and the heat insulation core material, and between the heat insulation core material and the lower panel; a glue guiding layer is filled between the upper panel and the heat insulation core material, and between the lower panel and the heat insulation core material; the glue guiding layer is a glass fiber cloth or a prefabricated rib.

[0014] Vent holes are arranged at the top of the heat insulation core material.

[0015] An adhesive method for the common bottom of the heat insulation interlayer of a launch vehicle tank, which uses the adhesive tooling for the common bottom of the heat insulation interlayer of a launch vehicle tank described in any one of the above to perform adhesion, including:

[0016] S1. Install the upper panel, the heat insulation core material, and the lower panel between the upper pressing ring and the lower tooling of the adhesive tooling, and a glue injection space is formed among the upper panel, the lower panel, the upper pressing ring, and the lower tooling;

[0017] S2. Plug the top nozzle of the upper panel and connect a vacuum device to the nozzle.

[0018] S3. Connect the vibrator to the lower tooling, turn on the vibrator, and turn on the vacuum device to evacuate the air to check the airtightness of the glue injection space. If the airtightness does not meet the requirements, adjust the bonding tooling until the airtightness meets the requirements.

[0019] S4. Turn off the vibrator, evacuate the air through the vacuum device. After the evacuation is completed, plug the nozzle, open the one-way valve connected to the glue injection tube to inject glue. After the glue injection is stable, open the top nozzle and connect the glue guiding tube.

[0020] S5. Raise the height of the glue injection tube, and at the same time turn on the vibrator to vibrate and remove bubbles until there are no bubbles in the glue liquid discharged from the glue guiding tube. Stop the glue injection and turn off the vibrator, remove the glue injection tube and the glue guiding tube, and plug the top nozzle to obtain the glue-injected workpiece.

[0021] S6. After curing the glue-injected workpiece, remove the upper pressing ring and the lower tooling to complete the co-bottom bonding.

[0022] The step S1 includes:

[0023] Place the lower panel on the supporting surface of the lower tooling, and the edge of the lower panel is located in the installation ring groove. Install the heat insulation core material and the lower panel on the surface of the lower panel facing away from the lower tooling in sequence, and fill the glue guiding layer between the upper panel and the heat insulation core material, and between the lower panel and the heat insulation core material. At the same time, install the second sealing ring between the lower panel and the lower tooling, and install the third sealing ring between the upper pressing ring and the lower tooling.

[0024] Finally, install the upper pressing ring and install the first sealing ring between the upper panel and the upper pressing ring.

[0025] Finally, fix the upper pressing ring and the lower tooling.

[0026] In the step S4, the outlet of the glue guiding tube is higher than the top nozzle.

[0027] In summary, the present application at least includes the following beneficial technical effects:

[0028] 1. Small area of bonding defects: The product is injected with glue by using the vacuum pumping and liquid column connection methods, and then the residual air is removed by using the vibration and liquid column pressure methods, which can completely eliminate the bonding defects.

[0029] 2. No need to use complex equipment such as vacuum bags and vacuum covers. The product is injected with glue by using the vacuum pumping and liquid column connection methods, and then the residual air is removed by using the vibration and liquid column pressure methods, with low cost.

[0030] 3. Less panel deformation: The lower tooling can effectively support the lower panel of the entire sandwich common bottom, preventing the lower panel structure from buckling due to negative pressure, and the panel surface variation can be less than 0.2 mm.

[0031] 4. High efficiency: The product is injected with glue by using the methods of vacuum pumping and liquid column connection, and then the residual air is removed by using the methods of vibration excitation and liquid column pressure, which can compress the working hours by 1 / 2.

[0032] 5. Low cost: The significant reduction of working hours can greatly reduce the cost. On the other hand, there is no need to use other large equipment such as vacuum covers and lifting devices, saving costs. Description of the Drawings

[0033] Figure 1 It is a schematic diagram of the bonding method applicable to the common bottom of the heat insulation sandwich of the carrier rocket tank.

[0034] Description of the reference numerals in the drawings: 1. Upper panel; 2. Lower panel; 3. Heat insulation core material; 4. Lower tooling; 5. Upper pressing ring; 6. First sealing ring; 7. Second sealing ring; 8. Third sealing ring; 9. Nozzle; 10. Vibrator; 11. Glue guiding pipe; 12. Check valve; 13. Glue injection pipe. Detailed Embodiment

[0035] To make the purpose, technical solution and advantages of the present application clearer, the following will further describe the disclosed embodiments of the present application in detail with reference to the drawings.

[0036] The embodiment of the present application discloses a bonding tooling for the common bottom of the heat insulation sandwich of the carrier rocket tank, as Figure 1 shown, which is used for the bonding process of the common bottom of the heat insulation sandwich of the carrier rocket tank. The common bottom of the heat insulation sandwich of the carrier rocket tank includes an upper panel 1, a heat insulation core material 3 and a lower panel 2 arranged in sequence. The upper panel 1 and the heat insulation core material 3, and the heat insulation core material 3 and the lower panel 2 are both connected by bonding. The heat insulation core material 3 can be made of polymethacrylimide foam or other porous heat insulation materials.

[0037] The bonding tooling includes an upper pressing ring 5 and a lower tooling 4. The middle part of the surface of the lower tooling 4 facing the upper pressing ring 5 is a supporting surface, and the shape of the supporting surface matches the shape of the lower panel 2, so that the lower panel 2 can be attached to the surface of the lower tooling 4. A glue injection ring groove is arranged on the surface of the lower tooling 4 facing the upper pressing ring 5, and a lower installation ring groove is arranged at the bottom of the glue injection ring groove. The lower installation ring groove is located at the outer edge of the supporting surface, and the bottom of the lower installation ring groove and the bottom of the glue injection ring groove form a step surface, so that when the edge of the lower panel 2 is installed in the lower installation ring groove, the step surface limits the edge of the lower panel 2. Inner and outer ring positions on the surface of the upper pressing ring 5 facing the lower tooling 4 are respectively provided with an upper installation ring groove and an assembly ring groove. The edge of the upper panel 1 cooperates with the upper installation ring groove, and the edge of the lower tooling 4 cooperates with the assembly ring groove.

[0038] A gap adjusting device is arranged in the glue injection space formed between the upper panel 1, the lower panel 2, the upper pressing ring 5 and the lower tooling 4. The gap adjusting device can extend between the upper panel 1 and the heat insulation core material 3, and between the edge of the heat insulation core material 3 and the lower panel 2 to adjust and fix the gap therebetween. Fiberglass cloth or prefabricated ribs are filled between the upper panel 1 and the heat insulation core material 3, and between the lower panel 2 and the heat insulation core material 3 to provide a bonding channel.

[0039] A third sealing ring 8 is arranged between the edge of the lower tooling 4 and the bottom of the assembly ring groove of the upper pressing ring 5. A first sealing ring 6 is arranged between the upper panel 1 and the bottom of the upper mounting ring groove of the upper pressing ring 5. A second sealing ring 7 is arranged between the lower panel 2 and the bottom of the lower mounting ring groove of the lower tooling 4, so as to form a sealed glue injection space between the upper panel 1, the lower panel 2, the upper pressing ring 5 and the lower tooling 4.

[0040] The lower tooling 4 is connected with a vibrator. The lower tooling 4 is provided with a nozzle 9 communicating the outside with the glue injection space, and the nozzle 9 is used for connecting a vacuum pumping device. The lower tooling 4 is provided with a glue injection pipe 13, and a check valve 12 is arranged on the glue injection pipe 13. The glue injection pipe 13 is used for injecting glue into the glue injection space. A top nozzle is arranged in the middle of the top of the upper panel 1, and the top nozzle is used for connecting a guide glue pipe 11.

[0041] The embodiment of the present application discloses a bonding method for the common bottom of the heat insulation interlayer of a launch vehicle tank, as Figure 1 shown. Taking the common bottom structure of a typical thin-walled panel foam sandwich large temperature difference heat insulation tank as an example, a special tooling is used to bond the common bottom of the heat insulation interlayer of the launch vehicle tank. The product is injected with glue by using the vacuum pumping and liquid column connection method, and then the residual air is removed by using the vibration and liquid column pressure method.

[0042] Specifically, the method includes the following steps:

[0043] S1. Limit the upper panel 1, the lower panel 2 and the heat insulation core material 3 through the upper pressing ring 5 and the lower tooling 4; and perform a trial assembly. Through the trial assembly, the product can be finely adjusted to prevent interference between the product and the tooling. When performing the trial assembly, a bow-shaped clamp or other pressing equipment can be used to adjust the gap between the upper panel of the common bottom of the sandwich, the lower panel of the common bottom of the sandwich and the heat insulation core material to adjust the distance between the bonding surfaces of the common bottom of the sandwich. After the trial assembly is completed, start the bonding.

[0044] S2. Seal the gap between the upper panel 1 and the upper pressing ring 5 with the first sealing ring 6, seal the gap between the lower panel 2 and the lower tooling 4 with the second sealing ring 7, and seal the gap between the upper pressing ring 5 and the lower tooling 4 with the third sealing ring 8;

[0045] S3. Provide ventilation holes at the top of the heat insulation core material 3. Meanwhile, fill fiberglass cloth between the upper panel 1 and the heat insulation core material 3, and between the lower panel 2 and the heat insulation core material 3 to provide a flow channel for the glue liquid. Preformed rib materials with the same thickness as the glue layer can also be used to provide a bonding channel. Adjust the gaps and fitting degrees among the upper panel 1, the lower panel 2, and the heat insulation core material 3 through a gap adjusting device to ensure the connection of the internal cavity.

[0046] In this step, an air path channel is formed on the bonding surfaces between the upper panel 1 and the heat insulation core material 3, and between the lower panel 2 and the heat insulation core material 3 to ensure that air can be smoothly discharged during bonding.

[0047] S4. Plug the nozzle on the top of the upper panel 1. Connect a vacuum pump to the nozzle 9 provided on the lower tooling 4 to evacuate the internal cavity of the product.

[0048] In this step, the lower tooling 4 is attached to the lower panel 2. The lower tooling 4 can effectively support the entire sandwich bottom to prevent the sandwich bottom structure from becoming unstable due to negative pressure.

[0049] S5. Connect the vibrator 10 to the lower tooling 4, turn on the vibrator and evacuate the air, and at the same time check the airtightness of the entire system.

[0050] S6. Turn off the vibrator 10, evacuate the air through the nozzle 9. After the evacuation is completed, plug the nozzle 9, open the one-way valve 12 to inject glue. After the glue injection is stable, open the nozzle on the top of the upper panel 1 and connect the glue guiding tube 11. The glue guiding tube 11 is used for discharging glue, and the height of the glue discharge outlet is increased to increase the liquid level pressure of the glue liquid in the cavity between the upper panel 1 and the lower panel 2.

[0051] S7. During the glue injection process, raise the glue injection tube 13 to increase the liquid level pressure of the glue liquid inside the sandwich bottom. A greater liquid level pressure of the glue liquid is beneficial to the discharge of air bubbles in the glue liquid. At the same time, turn on the vibrator 10 and adjust the vibration frequency of the vibrator to vibrate the entire tooling and product to remove air bubbles.

[0052] In this step, connecting the entire product and the tooling with the vibration equipment 10 can discharge the air in the cavity of the internal bonding surface of the product.

[0053] In this step, a communicating vessel is formed among the glue injection tube 13, the glue guiding tube 11, and the bonding cavity of the sandwich bottom product. When the glue guiding tube 11 has a relatively high height, raising the height of the glue injection tube 13 can increase the liquid level pressure inside the bonding surface of the sandwich bottom product and improve the efficiency of discharging internal air bubbles.

[0054] S8. Raise the height of the glue injection tube 13 until there are no air bubbles in the glue liquid discharged from the glue guiding tube 11. After the air in the glue liquid is discharged, stop the glue injection, remove the glue injection tube 13 and the glue guiding tube 11, and plug the nozzle on the top of the upper panel 1.

[0055] S9. The adhesive solution is cured according to the required curing mechanism, and the upper pressing ring 5 and the lower tooling 4 are removed, and the co-bottom bonding is completed.

[0056] In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present application.

[0057] The content not described in detail in the specification of the present application belongs to the well-known technology of those skilled in the art.

[0058] The present application has been described in detail above in conjunction with specific embodiments and exemplary examples, but these descriptions should not be construed as a limitation to the present application. Those skilled in the art understand that without departing from the spirit and scope of the present application, various equivalent substitutions, modifications or improvements can be made to the technical solutions and their implementation manners of the present application, and these all fall within the scope of the present application. The protection scope of the present application is subject to the appended claims.

Claims

1. A bonding tool for the thermal insulation interlayer of a launch vehicle tank, characterized in that: Used for gluing the common bottom of a launch vehicle tank thermal insulation interlayer, the common bottom of the launch vehicle tank thermal insulation interlayer comprises an upper panel (1), a thermal insulation core material (3) and a lower panel (2) which are arranged in sequence; The gluing tooling comprises an upper pressure ring (5) and a lower tooling (4); the middle part of the surface of the lower tooling (4) facing the upper pressure ring (5) is a supporting surface, the shape of the supporting surface matches the shape of the lower panel (2); the surface of the lower tooling (4) facing the upper pressure ring (5) is provided with a glue injection ring groove, the bottom of the glue injection ring groove is provided with a lower mounting ring groove, the lower mounting ring groove is located at the outer edge of the supporting surface, and the edge of the lower panel (2) is mounted in the lower mounting ring groove; the inner circle and outer circle positions of the surface of the upper pressure ring (5) facing the lower tooling (4) are respectively provided with an upper mounting ring groove and an assembly ring groove, the edge of the upper panel (1) matches the upper mounting ring groove, and the edge of the lower tooling (4) matches the assembly ring groove; A glue injection space is formed between the upper panel (1), the lower panel (2), the upper pressure ring (5) and the lower tooling (4); the lower tooling (4) is provided with a connection nozzle (9) for connecting the outside with the glue injection space; the connection nozzle (9) is used to connect a vacuum extraction device; the lower tooling (4) is connected to an exciter; the lower tooling (4) is provided with a glue injection pipe (13); a one-way valve (12) is provided on the glue injection pipe (13); the glue injection pipe (13) is used to inject glue into the glue injection space; a top connection nozzle is provided at the top middle of the upper panel (1).

2. The gluing tool for the thermal insulation interlayer of a launch vehicle tank according to claim 1, characterized in that: The top filling nozzle is connected with a rubber guide tube (11), and the outlet of the rubber guide tube (11) is higher than the top of the top filling nozzle.

3. The gluing tool for the thermal insulation interlayer of a launch vehicle tank according to claim 1, characterized in that: A third sealing ring (8) is arranged between the edge of the lower tooling (4) and the bottom of the assembly ring groove of the upper pressure ring (5), a first sealing ring (6) is arranged between the upper panel (1) and the bottom of the upper installation ring groove of the upper pressure ring (5), and a second sealing ring (7) is arranged between the lower panel (2) and the bottom of the lower installation ring groove of the lower tooling (4).

4. The gluing tool for the thermal insulation interlayer of a launch vehicle tank according to claim 1, characterized in that: A gap adjustment device is provided in the glue injection space formed between the upper panel (1), the lower panel (2), the upper pressure ring (5) and the lower tooling (4); the gap adjustment device can extend into the gap between the upper panel (1) and the thermal insulation core material (3), and between the thermal insulation core material (3) and the edge of the lower panel (2), to adjust and fix the gap between the upper panel (1) and the thermal insulation core material (3), and between the thermal insulation core material (3) and the lower panel (2); a conductive glue layer is filled between the upper panel (1) and the thermal insulation core material (3), and between the lower panel (2) and the thermal insulation core material (3); the conductive glue layer is glass fiber cloth or prefabricated ribs.

5. The gluing tool for the thermal insulation interlayer of a launch vehicle tank according to claim 1, characterized in that: The top of the heat-insulating core material (3) is provided with an air hole.

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