Airbus aircraft cargo hold floor and skin preparation equipment and technology

Abstract

The airbus aircraft cargo hold floor and skin preparation equipment comprises a base, a tank body is arranged on the base, a vacuum system is installed on the side wall face of the tank body, and a tank door is hinged to the tank body; the invention relates to the technical field of aircraft floor thermosetting forming, and has the beneficial effects that when a product needs to be heated or cooled, on the basis of working of an air circulator, high-temperature or low-temperature gas acts on the product from an air-assisted circulation rack vehicle at a short distance through an air supply pipeline, so that the heat conduction path of a large-volume tank body is shortened, and the heat conduction efficiency is improved. The problems that when a traditional autoclave only depends on overall circulation of the autoclave body, the temperature change speed is low, and the temperature difference between the central area and the edge is large due to the large product size are solved, the temperature distribution uniformity is improved, after product thermosetting is completed, the material moving frame works, so that the air-assisted circulation rack car and the product do not need to be manually moved, and the working difficulty is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of aircraft floor thermosetting forming, in particular to equipment and a process for preparing cargo hold floors and skins of Airbus aircraft. Background Art

[0002] Honeycomb sandwich composite structures are now common in civil aircraft cargo floors. The skin is typically made of fiberglass, and the core is typically made of aramid paper honeycomb layers, achieving lightweight, high strength, and high rigidity. However, cargo floors are susceptible to damage from impacts, scratches, and other external forces during use, necessitating frequent replacement. However, genuine Boeing or Airbus cargo floors are expensive, have long lead times, and are at risk of supply disruption due to the pandemic and trade frictions.

[0003] In the process of preparing the aircraft cargo hold floor and skin, an autoclave is required. The existing technologies involved are as follows:

[0004] 1. Publication No. CN116160698B discloses an autoclave assembly for bulletproof inserts, comprising: a base plate, an autoclave body, a door, a movable autoclave workbench, a sealing frame, a heating and cooling mechanism, and a vacuum mechanism; the autoclave body is mounted on the upper end of the base plate; the door is provided on one side of the autoclave body; a movable autoclave workbench is provided at the inner bottom of the autoclave body; a heating and cooling mechanism is further provided within the autoclave body; a sealing frame is provided above the movable autoclave workbench; and a vacuum mechanism is provided below the movable autoclave workbench.

[0005] 2. CN109519540B A tank and autoclave; the tank comprises a body, a first partition, a heating assembly, and a ventilation assembly. The body has a cavity with an open end. The first partition is disposed in the cavity, and the cavity is divided by the first partition into a first chamber and a second chamber that are interconnected. The heating assembly is disposed in the second chamber. The ventilation assembly is connected to the end of the body away from the opening, and is used to circulate air between the first chamber and the second chamber.

[0006] Due to the large size of the cargo hold floor of civil aircraft, in the above-mentioned prior art, the components used to promote air flow are all arranged at one end of the autoclave. During the heating and cooling stages, the air circulation path in the autoclave is too long, and a temperature gradient is easily formed in the area far away from the ventilation end, which affects the uniformity of heating and cooling of the aircraft cargo hold floor, directly affecting the material curing quality and structural performance. In addition, the hot pressing workbench in the autoclave needs to be manually pushed and pulled out by the staff. Due to the heavy weight of the large-sized floor, pushing and pulling is difficult, and the operation efficiency is low. In view of this, in-depth research on the above-mentioned problems has led to the creation of this case. Summary of the Invention

[0007] The present invention aims to solve the above-mentioned problems and designs an apparatus and process for preparing cargo floor and skin for Airbus aircraft. The apparatus and process solve the problem that the gas generated by the polycondensation reaction during the production of the skin is difficult to discharge, which easily leads to bubbles on the surface of the skin material and affects the skin quality. Therefore, in order to prevent bubbles from forming in the cover skin produced in batches, aircraft floor manufacturers usually only prepare one floor skin in a single thermosetting molding process, which is inefficient. In addition, the components that promote air flow in the existing autoclave are all arranged at one end of the autoclave. During the heating and cooling stages, the air circulation path in the autoclave is too long, and temperature gradients are easily formed in the area far from the ventilation end, which affects the uniformity of heating and cooling of the aircraft cargo floor, directly affecting the curing quality and structural performance of the material. In addition, the hot pressing workbench in the autoclave needs to be manually pushed and pulled out by the staff. Due to the heavy weight of the large-sized floor, pushing and pulling are difficult, resulting in low operating efficiency.

[0008] The technical solution of the present invention for achieving the above-mentioned purpose is as follows: an Airbus aircraft cargo hold floor and skin preparation device, comprising a base, a tank body is provided on the base, a vacuum system is installed on the side wall of the tank body, a tank door is hingedly connected to the tank body, an air circulator is provided on the end of the tank body away from the tank door, a fixed support is provided inside the tank body, an air-assisted circulation trolley is movably provided on the fixed support, products are provided on the air-assisted circulation trolley, an air supply pipeline is provided on the tank body corresponding to the air-assisted circulation trolley, and a material transfer rack is provided on the base corresponding to the fixed support;

[0009] The air-assisted circulation trolley includes a horizontal frame, a vertical pole is installed on the horizontal frame, a mesh plate is installed at one end of the vertical pole, the product is placed on the mesh plate, a frame structure is provided on both sides of the horizontal frame, two mounting blocks are longitudinally movably installed on the frame structure, the two mounting blocks are respectively located on the upper and lower sides of the mesh plate, an air pipe is fixedly inserted on each mounting block, nozzles are provided on the air pipe at equal distances, the nozzles are all aimed at the mesh plate, a flexible tube is installed on the end of the air pipe away from the tank door, and a docking tube is provided at one end of the flexible tube.

[0010] Preferably, the frame structure includes a slide bar, the cross-section of the slide bar is a T-shaped structure, a circular frame is installed on the upper wall of the slide bar, a bracket is installed on the outer wall of the circular frame, the docking tube is fixedly inserted on the bracket, and a rotating shaft is installed on the inner wall of the circular frame, a first threaded rod is installed at one end of the rotating shaft, a second threaded rod is installed at one end of the first threaded rod, and the thread directions of the first threaded rod and the second threaded rod are opposite, the two mounting blocks are respectively movably mounted on the first threaded rod and the second threaded rod through threads, a driven bevel gear is fixedly mounted on the rotating shaft, and guide rods are movably inserted on the two mounting blocks, the guide rods are fixedly mounted on the circular frame, and an adjustment component is also provided on the slide bar.

[0011] Preferably, the adjustment assembly includes a slot box, which is installed on the slide bar, a hand lever movably installed on the slot box, a side shaft movably installed on the side wall of the slot box, an active bevel gear fixedly mounted on one end of the side shaft located outside the slot box, the active bevel gear and the driven bevel gear are engaged with each other, a worm gear fixedly mounted on one end of the side shaft located inside the slot box, and a worm gear matching the worm gear is provided on the hand lever.

[0012] Preferably, the gas supply pipeline includes four connecting pipes, which are inserted into the end of the tank body away from the tank door, and a check valve is provided on each of the four connecting pipes. A U-shaped tube is installed at one end of the four connecting pipes located outside the tank body, and a hot air valve and a cold air valve are installed on the U-shaped tube.

[0013] Preferably, the fixed support includes a concave frame, which is fixedly installed on the inner wall of the tank body. Two fixed guide bars are installed on the upper wall of the concave frame. The cross section of each fixed guide bar is a concave structure. The sliding bar is movably inserted into the fixed guide bar, and the two fixed guide bars are closed structures at one end away from the tank door.

[0014] Preferably, the material moving rack includes two first screw modules, which are symmetrically installed on the base, a connecting rod is installed between the moving ends of the two first screw modules, an electric push rod is installed on the connecting rod, and a second screw module is installed on the telescopic end of the electric push rod, two stop columns are installed on the moving end of the second screw module, the minimum distance between the two stop columns is greater than the width of the cross frame, and a vertical frame is installed on the moving end of each of the first screw modules, and an extension bar is installed on the vertical frame, and the cross-sectional shape of the extension bar is the same as that of the fixed guide bar.

[0015] Preferably, the air circulator includes a buckle cover, which is installed on the inner wall of one end of the tank body, and a cooling water pipe is inserted into the buckle cover, and the cooling water pipe runs through the upper wall of the tank body. A heating wire is installed inside the buckle cover, and a motor is installed at one end of the outer wall of the tank body. The driving end of the motor is movably inserted into the tank body, and the driving end of the motor is equipped with fan blades.

[0016] Preferably, a push rod is installed on the inner wall surface of the tank door, a buffer block is installed on one end of the push rod, and the buffer block is arranged corresponding to the return frame.

[0017] A honeycomb composite material panel suitable for use in cargo hold floors of Airbus aircraft, comprising a mold and a product, wherein the product is composed of an upper skin and a lower skin;

[0018] The upper skin includes a first layer of skin, a second layer of skin, a third layer of skin, a fourth layer of skin and a fifth layer of skin;

[0019] The lower skin includes the lower layer of skin and the lower second layer of skin;

[0020] An upper frosted layer is provided on the upper layer of the skin, and a lower frosted layer is provided on the lower layer of the skin, and the lower frosted layer is bonded to the supporting mold;

[0021] The lower two layers of the skin are provided with a lower glue film, the upper five layers of the skin are provided with an upper glue film, an aramid paper honeycomb layer is provided between the lower glue film and the upper glue film, and the edges of the aramid paper honeycomb layer are provided with edge sealing glue;

[0022] A sidewall strip is provided on the mold and around the product.

[0023] A skin preparation process, the product includes a bottom mold and a top mold, a plurality of breathable molds are arranged between the bottom mold and the top mold, each of the breathable molds is composed of a whole plate mold, a C-shaped support steel bar and a steel perforated plate, the upper wall of the steel perforated plate is adhered to a breathable cloth, the upper wall of the breathable cloth is adhered to the skin material, and the bottom mold is adhered to a first vacuum bag.

[0024] A floor preparation process, the product comprising a supporting mold and a second vacuum bag, a floor material being arranged on the supporting mold and inside the second vacuum bag, the floor material being composed of an upper skin and a lower skin;

[0025] The upper skin includes a first layer of skin, a second layer of skin, a third layer of skin, a fourth layer of skin and a fifth layer of skin;

[0026] The lower skin includes the lower layer of skin and the lower second layer of skin;

[0027] An upper frosted layer is provided on the upper layer of the skin, and a lower frosted layer is provided on the lower layer of the skin, and the lower frosted layer is bonded to the supporting mold;

[0028] The lower two layers of the skin are provided with a lower glue film, the upper five layers of the skin are provided with an upper glue film, an aramid paper honeycomb layer is provided between the lower glue film and the upper glue film, and the edges of the aramid paper honeycomb layer are provided with edge sealing glue;

[0029] A sidewall strip is provided on the supporting mold and around the product.

[0030] The following steps are involved in making the skin and floor:

[0031] Step 1: Lay out the upper layer, the second upper layer, the third upper layer, the fourth upper layer, and the fifth upper layer of the skin at 0° and make bags; Lay out the lower layer and the second lower layer of the skin at 0° and make bags;

[0032] Step 2: Using Airbus aircraft cargo hold floor and skin preparation equipment, the upper skins and lower skins are solidified and formed respectively;

[0033] Step 3: Use a material transfer rack to remove the air-assisted circulation carriage and the skin product on it from the autoclave, and use an overhead crane to transfer the air-assisted circulation carriage and the skin product on it to the demoulding area, clean the vacuum auxiliary materials on the surface of the upper skin and the lower skin in turn, and separate the multiple upper skins from the multiple lower skins;

[0034] Step 4. Use a pneumatic grinder and 240# sandpaper to roughen the film surface of the upper and lower skins. Use an air blower to clean the dust on the surface of the product, and use a dust-free cloth dipped in an appropriate amount of alcohol to clean the remaining dust.

[0035] Step 5: Fit the mold surface of the lower skin to the support mold, lay adhesive film on the adhesive surface of the lower skin, overlap and lay the adhesive film, lay an aramid paper honeycomb layer in the center of the lower skin, fill the edge adhesive filling mark area on the aramid paper honeycomb layer with edge adhesive, lay adhesive film on the aramid paper honeycomb layer, overlap and lay the adhesive film, then lay the upper skin, then place density board edge strips on the edge of the upper skin, lay non-porous isolation film, breathable felt, vacuum bag film and vacuum auxiliary materials in sequence to complete the bagging of the floor product;

[0036] Step 6: Use Airbus aircraft cargo hold floor and skin preparation equipment to solidify and shape the floor products, stack multiple floor products, and solidify and shape multiple floor products simultaneously;

[0037] Step 7: Use the material transfer rack to remove the air-assisted circulation carriage and the flooring product on it from the autoclave, and use the overhead crane to transfer the air-assisted circulation carriage and the flooring product on it to the demoulding area, and clean the vacuum auxiliary material on the surface of the flooring product;

[0038] Step 8: Use a three-axis CNC machine to cut and punch the product, print the product logo, and stick it to a fixed position;

[0039] Step 9: Carry out embedded work according to the supporting drawings;

[0040] Step 10: Paste the shock-absorbing pads according to the supporting drawings.

[0041] The equipment and process for preparing the cargo floor and skin of an Airbus aircraft manufactured using the technical solution of the present invention have the following beneficial effects:

[0042] 1. When making the skin, adjacent skin materials are separated and stacked together by a breathable mold covered with breathable cloth. Then the first vacuum bag is vacuum bagged. The gas generated by the polycondensation reaction of the skin material enters between the whole plate mold and the steel perforated plate through the holes in the breathable cloth and the steel perforated plate. The C-shaped support steel bar is used to separate the whole plate mold and the steel perforated plate to discharge the gas generated by the polycondensation reaction of the skin material, prevent the presence of bubbles in the skin material, and ensure the production quality of the skin material. Multiple skin materials can be made simultaneously in one vacuum bagging and curing work, which improves production efficiency.

[0043] 2. After the skin material and floor material are bagged, they are placed in an autoclave designed with an air-assisted circulation rack, an air supply pipeline, and a material transfer rack. The air-assisted circulation rack is provided with upper and lower pipelines that can adjust the distance between the rack and the product. The air supply pipeline provides high-temperature or low-temperature gas to the pipeline in the air-assisted circulation rack. When the product needs to be heated or cooled, the air circulator works and the high-temperature or low-temperature gas is applied to the product from the air-assisted circulation rack at close range through the air supply pipeline, shortening the heat conduction path of the large-volume tank body. This overcomes the problem that the traditional autoclave only relies on the overall circulation of the tank body, with a slow temperature change rate and a large temperature difference between the center and the edge due to the large volume of the product, thereby improving the uniformity of temperature distribution. After the product is thermally cured, the material transfer rack works so that the air-assisted circulation rack and the product do not need to be moved manually, reducing the difficulty of work. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] Figure 1 This is a schematic diagram of the three-dimensional structure from the main viewing angle of the equipment for preparing the cargo hold floor and skin of an Airbus aircraft according to the present invention.

[0045] Figure 2 This is a schematic diagram of the three-dimensional structure from a rear view angle of an Airbus aircraft cargo hold floor and skin preparation equipment described in the present invention.

[0046] Figure 3 This is a schematic diagram of the three-dimensional structure of an air-assisted circulation frame vehicle for preparing the cargo hold floor and skin of an Airbus aircraft as described in the present invention.

[0047] Figure 4 This is a schematic diagram of the top view of the structure of the adjustment components of the Airbus aircraft cargo hold floor and skin preparation equipment described in the present invention.

[0048] Figure 5 This is a schematic diagram of the three-dimensional structure at an upward angle of view of the adjustment component of the Airbus aircraft cargo hold floor and skin preparation equipment described in the present invention.

[0049] Figure 6 This is a schematic diagram of the three-dimensional structure of the material transfer rack of the Airbus aircraft cargo hold floor and skin preparation equipment as described in the present invention, viewed from a top angle.

[0050] Figure 7 This is a schematic diagram of the three-dimensional structure of the material transfer rack of the Airbus aircraft cargo hold floor and skin preparation equipment described in the present invention, viewed from an upward angle.

[0051] Figure 8 This is a side structural schematic diagram of the air-assisted circulation rack and material transfer rack of the Airbus aircraft cargo hold floor and skin preparation equipment described in the present invention.

[0052] Figure 9 This is a side structural schematic diagram of the air circulator portion of an Airbus aircraft cargo hold floor and skin preparation equipment according to the present invention.

[0053] Figure 10 This is a schematic diagram of the main cross-sectional structure of an Airbus aircraft cargo hold floor and skin preparation device according to the present invention.

[0054] Figure 11 This is a schematic diagram of a skin preparation process according to the present invention.

[0055] Figure 12 Schematic diagram of the top view of the C-shaped support steel bar in the skin preparation process of the present invention

[0056] Figure 13 This is a schematic diagram of a floor preparation process according to the present invention.

[0057] In the picture:

[0058] 1. Base;

[0059] 2. Tank body, 21. Tank door, 22. Push rod, 23. Buffer block;

[0060] 3. Vacuum system;

[0061] 4. Air circulator, 41. Buckle cover, 42. Cooling water pipe, 43. Heating wire, 44. Motor, 45. Fan blade;

[0062] 5. Fixed support, 51. Concave frame, 52. Fixed guide bar;

[0063] 6. Air-assisted circulation frame, 61. Horizontal frame, 62. Vertical pole, 63. Mesh plate;

[0064] 64. Frame structure, 641. Slide bar, 642. Return frame, 643. Bracket, 644. Rotating shaft, 645. First threaded rod, 646. Second threaded rod, 647. Driven bevel gear, 648. Guide rod;

[0065] 649, adjustment assembly, 6491, slot box, 6492, hand lever, 6493, side shaft, 6494, active bevel gear, 6495, worm gear, 6496, worm;

[0066] 65. Mounting block, 66. Air pipe, 67. Nozzle, 68. Flexible pipe, 69. Butt joint pipe;

[0067] 7. Gas supply line, 71. Connecting pipe, 72. Check valve, 73. U-shaped pipe, 74. Hot air valve, 75. Cold air valve;

[0068] 8. Material transfer rack, 81. First screw module, 82. Connecting rod, 83. Electric push rod, 84. Second screw module, 85. Stop column, 86. Stand, 87. Extension bar;

[0069] 9. Products;

[0070] 11. Bottom mold, 12. Top mold, 13. Breathable mold, 131. Whole plate mold, 132. C-shaped support steel bar, 133. Steel perforated plate, 14. Breathable cloth, 15. Skin material, 16. First vacuum bag;

[0071] 91. Support mold, 92. Second vacuum bag, 93. Upper skin, 931. Upper layer of skin, 932. Upper second layer of skin, 933. Upper third layer of skin, 934. Upper fourth layer of skin, 935. Upper fifth layer of skin, 940. Lower skin, 941. Lower layer of skin, 942. Lower second layer of skin, 94. Upper frosted layer, 95. Lower frosted layer, 96. Lower adhesive film, 97. Upper adhesive film, 98. Aramid paper honeycomb layer, 99. Edge sealing glue, 910. Edge strip. DETAILED DESCRIPTION

[0072] Example 1:

[0073] The present invention will be described in detail below with reference to the accompanying drawings. Figure 1-10 As shown, an Airbus aircraft cargo hold floor and skin preparation device.

[0074] Through the use of wires by those skilled in the art, all electrical components in this case are connected to their corresponding power supplies, and appropriate controllers should be selected according to actual conditions to meet control requirements. The specific connection and control sequence should refer to the following working principle, in which the electrical components are electrically connected in sequence. The detailed connection means are well-known technologies in this field. The following mainly introduces the working principle and process, and does not explain the electrical control.

[0075] An Airbus aircraft cargo hold floor and skin preparation device includes a base 1, a tank body 2 is provided on the base 1, a vacuum system 3 is installed on the side wall of the tank body 2, a tank door 21 is hingedly connected to the tank body 2, an air circulator 4 is provided on the end of the tank body 2 away from the tank door 21, a fixed support 5 is provided inside the tank body 2, an air-assisted circulation trolley 6 is movably provided on the fixed support 5, a product 9 is provided on the air-assisted circulation trolley 6, an air supply pipeline 7 is provided on the tank body 2 corresponding to the air-assisted circulation trolley 6, and a material transfer rack 8 is provided on the base 1 corresponding to the fixed support 5;

[0076] It should be noted that the equipment is fixedly installed in the target area and connected to the power supply and control system. The base 1, tank body 2, vacuum system 3, tank door 21, and air circulator 4 constitute the local structure of the autoclave, which is a prior art. The specific structure and working principle can be referred to a tank body and autoclave with publication number CN109519540B. The fixed support 5 is used to support the air-assisted circulation frame 6, which is used to place the product 9 to be heat-cured. The air supply pipeline 7 provides high-temperature or low-temperature gas to the air-assisted circulation frame 6. When the product 9 needs to be heat-cured, the air supply pipeline 7 provides high-temperature or low-temperature gas to the air-assisted circulation frame 6. When heating or cooling, based on the operation of the air circulator 4, the high-temperature or low-temperature gas is applied to the product 9 from the air-assisted circulation carriage 6 at a close distance through the air supply pipe 7, thereby shortening the heat conduction path of the large-volume tank body 2. This overcomes the problems of slow temperature change when the traditional autoclave relies solely on the overall circulation of the tank body 2 and the large temperature difference between the center and the edge due to the large volume of the product 9, thereby improving the uniformity of temperature distribution. After the product 9 is thermally cured, the air-assisted circulation carriage 6 and the product 9 do not need to be moved manually through the operation of the material moving rack 8, thereby reducing the difficulty of work.

[0077] Specifically, the air-assisted circulation carriage 6 includes a horizontal frame 61, on which a vertical pole 62 is mounted, and a mesh plate 63 is mounted at one end of the vertical pole 62. The product 9 is placed on the mesh plate 63. A frame structure 64 is provided on both sides of the horizontal frame 61. Two mounting blocks 65 are longitudinally movably mounted on the frame structure 64. The two mounting blocks 65 are respectively located on the upper and lower sides of the mesh plate 63. An air pipe 66 is fixedly inserted on each mounting block 65. Nozzles 67 are equidistantly arranged on the air pipe 66. The nozzles 67 are all aimed at the mesh plate 63. A flexible pipe 68 is installed on the end of the air pipe 66 away from the tank door 21, and a docking pipe 69 is provided at one end of the flexible pipe 68.

[0078] It should be noted that, in the initial state, the tank door 21 is open, the material transfer rack 8 is docked with the fixed support 5, and the air-assisted circulation carriage 6 is located on the material transfer rack 8. The staff can place the product 9 on the mesh plate 63. Then, the operator can operate the frame structure 64 according to the size of the product 9, so that the upper and lower air pipes 66 are adjusted to the upper and lower parts of the product 9, and the upper and lower nozzles 67 are aligned with the upper surface of the product 9 and the lower surface of the mesh plate 63.

[0079] Specifically, the frame structure 64 includes a slide bar 641, the cross-section of the slide bar 641 is a T-shaped structure, a return frame 642 is installed on the upper wall of the slide bar 641, a bracket 643 is installed on the outer wall of the return frame 642, the butt joint 69 is fixedly inserted on the bracket 643, and a rotating shaft 644 is installed on the inner wall of the return frame 642. A first threaded rod 645 is installed on one end of the rotating shaft 644, and a second threaded rod 646 is installed on one end of the first threaded rod 645. The thread directions of the first threaded rod 645 and the second threaded rod 646 are opposite, and two mounting blocks 65 are respectively movably sleeved on the first threaded rod 645 and the second threaded rod 646 through threads, a driven bevel gear 647 is fixedly sleeved on the rotating shaft 644, and a guide rod 648 is movably inserted on the two mounting blocks 65, and the guide rod 648 is fixedly installed on the return frame 642. An adjustment component 649 is also provided on the slide bar 641;

[0080] Specifically, the adjustment assembly 649 includes a slot box 6491, which is installed on the slide bar 641. A hand lever 6492 is movably installed on the slot box 6491. A side shaft 6493 is movably installed on the side wall of the slot box 6491. The side shaft 6493 is located outside the slot box 6491 and fixedly sleeved with a driving bevel gear 6494 at one end. The driving bevel gear 6494 is meshed with the driven bevel gear 647. The side shaft 6493 is located inside the slot box 6491 and fixedly sleeved with a worm gear 6495 at one end. A worm 6496 is provided on the hand lever 6492 to match the worm gear 6495.

[0081] It should be noted that when operating the frame structure 64, the staff can rotate the hand lever 6492 on the trough box 6491, and the worm 6496 on the hand lever 6492 drives the worm gear 6495, the side shaft 6493 and the active bevel gear 6494 to rotate, and the driven bevel gear 647 drives the rotating shaft 644, the first threaded rod 645 and the second threaded rod 646 to rotate. Under the limit of the guide rod 648, the two mounting blocks 65 respectively drive the air pipes 66 thereon to move closer to or away from each other. When the position of the air pipe 66 is adjusted, the material moving rack 8 is operated to move the air-assisted circulation rack 6 from the material moving rack 8 to the fixed support 5 in the tank body 2, and the docking pipe 69 is sealed and docked with the air supply pipe 7. Then the material moving rack 8 works again to make the material moving rack 8 leave the fixed support 5, and then the tank door 21 is closed;

[0082] Specifically, the gas supply pipeline 7 includes four connecting pipes 71, which are inserted into the end of the tank body 2 away from the tank door 21. The four connecting pipes 71 are each provided with a check valve 72. The four connecting pipes 71 are provided with a U-shaped pipe 73 at one end outside the tank body 2. The U-shaped pipe 73 is provided with a hot air valve 74 and a cold air valve 75.

[0083] It should be noted that the hot air valve 74 is connected to the hot air supply system, the cold air valve 75 is connected to the cold air supply system, and the butt joint 69 is sealed with the connecting pipe 71. When heating, the hot air valve 74 is opened, and the hot air enters the butt joint 69 through the check valve 72, passes through the flexible pipe 68 and the air pipe 66, and is blown toward the product 9 from the nozzle 67. When cooling, the hot air valve 74 is closed, and the cold air valve 75 is opened, and the cold air is blown toward the product 9 from the nozzle 67.

[0084] Specifically, the fixed support 5 includes a concave frame 51, which is fixedly mounted on the inner wall of the tank body 2. Two fixed guide bars 52 are mounted on the upper wall of the concave frame 51. The cross section of each fixed guide bar 52 is a concave structure. The slide bar 641 is movably inserted into the fixed guide bar 52. The ends of the two fixed guide bars 52 away from the tank door 21 are closed structures.

[0085] It should be noted that the concave frame 51 is used to fix the two fixed guide bars 52 in the tank body 2. The slide bar 641 can slide in the fixed guide bar 52. The lower wall of the slide bar 641 can be provided with a groove. A plurality of rollers are provided in the groove. The rollers are attached to the fixed guide bar 52 to reduce the friction between the slide bar 641 and the fixed guide bar 52.

[0086] Specifically, the material moving rack 8 includes two first screw rod modules 81, which are symmetrically mounted on the base 1. A connecting rod 82 is mounted between the moving ends of the two first screw rod modules 81, and an electric push rod 83 is mounted on the connecting rod 82. A second screw rod module 84 is mounted on the telescopic end of the electric push rod 83. Two blocking columns 85 are mounted on the moving end of the second screw rod module 84. The minimum distance between the two blocking columns 85 is greater than the width of the cross frame 61. A vertical frame 86 is mounted on the moving end of each first screw rod module 81, and an extension bar 87 is mounted on the vertical frame 86. The cross-sectional shape of the extension bar 87 is the same as that of the fixed guide bar 52.

[0087] It should be noted that the specific structure and working principle of the first screw module 81 and the second screw module 84 can refer to the linear motion module produced by Shenzhen Yutao Precision Technology Co., Ltd. When the tank body 2 and the tank door 21 are in a buckled state, the moving ends of the two first screw modules 81 are in the extreme position away from the tank body 2, and the components installed on the moving ends of the two first screw modules 81 are away from the tank body 2. When it is necessary to take out the air-assisted circulation frame 6, the tank door 21 is opened, and the first screw module 81 works forward to move the moving end of the first screw module 81 to the extreme position close to the tank body 2. At this time, the extension bar 87 and the fixed guide bar 5 are in a buckled state. 2 docking, through the forward operation of the second screw module 84, the moving end of the second screw module 84 drives the two blocking columns 85 to move into the interior of the tank body 2 and align with the two sides of the cross frame 61. Through the extension of the electric push rod 83, the tops of the two blocking columns 85 are raised above the cross frame 61. Through the reverse operation of the second screw module 84, the two blocking columns 85 match the cross frame 61, so that the air-assisted circulation carriage 6 moves from the fixed guide bar 52 to the extension bar 87. Then, through the reverse operation of the two first screw modules 81, the components installed on the moving ends of the two first screw modules 81 and the air-assisted circulation carriage 6 move away from the tank body 2;

[0088] The lower wall surface of the movable end of the first screw module 81 may also be provided with a groove, in which a plurality of rollers are arranged. The rollers are attached to the base 1 and are used to support the lateral movement of the movable end of the first screw module 81.

[0089] Specifically, the air circulator 4 includes a buckle cover 41, which is mounted on the inner wall of one end of the tank body 2. A cooling water pipe 42 is inserted into the buckle cover 41, and the cooling water pipe 42 passes through the upper wall of the tank body 2. A heating wire 43 is installed inside the buckle cover 41. A motor 44 is installed at one end of the outer wall of the tank body 2. The driving end of the motor 44 is movably inserted into the tank body 2, and the driving end of the motor 44 is equipped with a fan blade 45.

[0090] It should be noted that the cooling water pipe 42 is connected to the cooling water circulation system. During heating, the heating wire 43 works, and the motor 44 drives the fan blades 45 to rotate, so that the high-temperature gas near the heating wire 43 circulates in the tank body 2. During cooling, the heating wire 43 stops working, and cooling water flows in the cooling water pipe 42. The motor 44 drives the fan blades 45 to rotate, so that the low-temperature gas near the cooling water pipe 42 circulates in the tank body 2.

[0091] Specifically, a push rod 22 is installed on the inner wall of the tank door 21, and a buffer block 23 is installed at one end of the push rod 22. The buffer block 23 is set corresponding to the return frame 642;

[0092] It should be noted that after the tank door 21 is closed, the buffer block 23 is supported by the push rod 22 and abuts against the return frame 642 to ensure that the butt joint 69 and the connecting pipe 71 are tightly fitted. A sealing ring can be provided on the connecting pipe 71 to ensure a sealing effect.

[0093] Example 2:

[0094] like Figure 11-12 As shown, a skin preparation process, the product 9 includes a bottom mold 11 and a top mold 12, a plurality of breathable molds 13 are arranged between the bottom mold 11 and the top mold 12, each breathable mold 13 is composed of a whole plate mold 131, a C-shaped support steel bar 132 and a steel perforated plate 133, the upper wall of the steel perforated plate 133 is adhered to a breathable cloth 14, the upper wall of the breathable cloth 14 is adhered to a skin material 15, and a first vacuum bag 16 is adhered to the bottom mold 11;

[0095] It should be noted that when making the skin, adjacent skin materials 15 are separated and stacked together by a breathable mold 13 covered with a breathable cloth 14, and then the first vacuum bag 16 is vacuum-bagged. The gas generated when the skin material 15 undergoes a condensation reaction passes through the holes on the breathable cloth 14 and the steel orifice plate 133 into the space between the whole plate mold 131 and the steel orifice plate 133. The C-shaped support steel bar 132 is used to separate the whole plate mold 131 and the steel orifice plate 133, and is used to discharge the gas generated during the condensation reaction of the skin material 15, prevent the presence of bubbles in the skin material 15, and ensure the production quality of the skin material 15. Multiple skin materials 15 can be made at the same time in one vacuum bagging and curing work, thereby improving production efficiency. The breathable cloth 14 uses a rigid and breathable cloth, which is both breathable and can prevent the phenolic resin on the skin material 15 from entering the holes in the steel orifice plate 133 to prevent blockage.

[0096] Example 3:

[0097] like Figure 13 As shown, a floor preparation process, a product 9 includes a support mold 91 and a second vacuum bag 92, a floor material is arranged on the support mold 91 and inside the second vacuum bag 92, and the floor material is composed of an upper skin 93 and a lower skin 940;

[0098] The upper skin 93 includes an upper skin layer 931, a second upper skin layer 932, a third upper skin layer 933, a fourth upper skin layer 934, and a fifth upper skin layer 935;

[0099] The lower skin 940 includes a lower skin layer 941 and a second lower skin layer 942;

[0100] An upper frosted layer 94 is provided on the upper layer 931 of the skin, and a lower frosted layer 95 is provided on the lower layer 941 of the skin. The lower frosted layer 95 is bonded to the supporting mold 91.

[0101] A lower adhesive film 96 is provided on the lower two layers 942 of the skin, an upper adhesive film 97 is provided on the upper five layers 935 of the skin, an aramid paper honeycomb layer 98 is provided between the lower adhesive film 96 and the upper adhesive film 97, and an edge sealing adhesive 99 is provided on the edge of the aramid paper honeycomb layer 98;

[0102] Supporting the mold 91, and provided with a sidewall strip 910 located around the product;

[0103] It should be noted that when making the floor, multiple products can be stacked on top of each other using pads and placed together in the Airbus aircraft cargo hold floor and skin preparation equipment to make multiple floors at the same time;

[0104] Example 4:

[0105] Specific steps:

[0106] Step 1, making the skin material 15: performing 0° plying and bagging of the upper skin layer 931, the second upper skin layer 932, the third upper skin layer 933, the fourth upper skin layer 934 and the fifth upper skin layer 935;

[0107] The upper skin 93 has five layers of prepreg, namely, the upper skin layer 931, the second upper skin layer 932, the third upper skin layer 933, the fourth upper skin layer 934, and the fifth upper skin layer 935. The thickness after curing is 1.3±0.1mm. The ply direction is 0°. During ply laying, the air between the prepreg layers must be exhausted with a scraper until no obvious bubbles are visible between the layers. Each ply is pre-compacted with a bag. Wrinkles must be smoothed with a scraper or sheared.

[0108] After the paving is completed, the release cloth, non-porous isolation film, breathable felt, vacuum bag film and vacuum auxiliary materials are laid in sequence to complete the bag making;

[0109] Lay the lower layer 941 of the skin and the second lower layer 942 of the skin at 0° and make bags;

[0110] The lower skin 940 consists of two layers of prepreg, namely the lower skin layer 941 and the second lower skin layer 942. The thickness after curing is 0.5±0.1mm, and the ply direction is 0°. When laying the layers, a scraper should be used to remove all air between the prepreg layers until there are no visible bubbles between the layers. Each layer should be pre-compacted with a bag, and wrinkles should be rolled flat or sheared with a scraper.

[0111] After the paving is completed, the release cloth, non-porous isolation film, breathable felt, vacuum bag film and vacuum auxiliary materials are laid in sequence to complete the bag making;

[0112] Step 2: Curing the skin material 15: Using the Airbus aircraft cargo floor and skin preparation equipment, the upper skins 93 and the lower skins 940 are cured and formed respectively;

[0113] The curing process of the upper skin 93 and the lower skin 940 is the same, and the curing process is as follows:

[0114] First stage heating: heating to 60℃, vacuum pumping for 30 minutes;

[0115] Second stage heating and heat preservation: heating to 120℃, pressurizing to 0.1MPa, and heat preservation for 60 minutes;

[0116] Three-stage heating and holding: heating to 150°C, pressurizing to 0.3 MPa, and holding for 90 minutes;

[0117] Three-stage cooling: cooling to room temperature, cooling rate 2-3℃ / min, pressure relief when temperature is less than 60℃;

[0118] Step 3, demoulding: Use the material transfer rack 8 to remove the air-assisted circulation carriage 6 and the skin product on it from the autoclave, and use the overhead crane to transfer the air-assisted circulation carriage 6 and the skin product on it to the demoulding area. Clean the vacuum auxiliary materials on the surface of the upper skin 93 and the lower skin 940 in turn, and separate the multiple upper skins 93 from the multiple lower skins 940. During the demoulding operation, it is forbidden to scratch the product 9 and it is forbidden to bend the product 9 at a large angle.

[0119] Step 4: Grinding: Use a pneumatic grinder with 240# sandpaper to roughen the film surface of the upper skin 93 and the lower skin 940. Use an air blower to clean the dust on the surface of the product 9, and use a dust-free cloth dipped in an appropriate amount of alcohol to clean the remaining dust. During the grinding operation, do not scratch the product 9 or bend the product 9 at a large angle.

[0120] Step 5, making floor materials: fit the mold surface of the lower skin 940 to the support mold 91, lay the lower adhesive film 96 on the adhesive surface of the lower skin 940, overlap and lay the lower adhesive film 96, and the overlapping area ≤10mm, lay the aramid paper honeycomb layer 98 in the center of the lower skin 940, fill the edge sealing glue 99 on the aramid paper honeycomb layer 98 with the edge sealing glue 99 in the marked area, and the edge sealing glue 99 needs to be pressed flat and compacted. No gaps are allowed in the filled area, lay the upper adhesive film 97 on the aramid paper honeycomb layer 98, overlap and lay the upper adhesive film 97, pay attention to the pressure during the filling process to prevent the aramid paper honeycomb layer 98 from sinking, then lay the upper skin 93, and then place the density board edge strip 910 with a height of 17±1mm on the edge of the upper skin 93, and lay the non-porous isolation film, breathable felt, vacuum bag film and vacuum auxiliary materials in sequence to complete the bagging of the floor product;

[0121] Step 6: Gluing and curing: Use the Airbus aircraft cargo hold floor and skin preparation equipment to cure and shape the floor products. Stack multiple floor products and cure and shape multiple floor products at the same time.

[0122] First stage heating: heating to 60℃, vacuum pumping for 30 minutes;

[0123] Second stage heating and heat preservation: heating to 120℃, pressurizing to 0.1MPa, and heat preservation for 60 minutes;

[0124] Three-stage heating and holding: heating to 150°C, pressurizing to 0.3 MPa, and holding for 90 minutes;

[0125] Three-stage cooling: cooling to room temperature, cooling rate 2-3℃ / min, pressure relief when temperature is less than 60℃;

[0126] Step 7: Use the material transfer rack 8 to remove the air-assisted circulation carriage 6 and the flooring product on it from the autoclave. Use the overhead crane to transfer the air-assisted circulation carriage 6 and the flooring product on it to the demolding area and clean the vacuum auxiliary material on the surface of the flooring product. During the demolding operation, it is forbidden to scratch the product 9 or bend the product 9 at a large angle.

[0127] Step 8: Cutting: Use a three-axis CNC machine tool to cut and punch product 9, print the product 9 logo, and stick it to a fixed position;

[0128] Step 9, embed parts: embed parts according to the supporting drawings;

[0129] Step 10. Pasting: Paste the shock-absorbing pad according to the supporting drawings; after the shock-absorbing pad is pasted, the appearance needs to be straight and flat without bending or deformation.

[0130] Example 5:

[0131] When making floors, custom presses can also be used to form:

[0132] Step 1: Use a custom press mold with upper and lower constant temperature heating plates, with a temperature control accuracy of ±2°C and a pressure control of 0-1MPa, and designed with a vacuum channel and air barrier layer;

[0133] Step 2: pre-assemble the glass fiber prepreg and the honeycomb core material into a mold cavity;

[0134] Step 3: Start the press to perform synchronous heating and pressing. The temperature rise curve is consistent with the curing curve of the phenolic resin:

[0135] Step 4: Heat to 150°C, pressurize to 0.5 MPa, and keep warm for 90 minutes;

[0136] Step 5: Cool and demould to complete the honeycomb floor manufacturing.

[0137] The above technical solutions only reflect the preferred technical solutions of the technical solutions of the present invention. Any changes that may be made to certain parts thereof by those skilled in the art all reflect the principles of the present invention and fall within the scope of protection of the present invention.

Claims

1. An Airbus aircraft cargo hold floor and skin preparation device, comprising a base (1), a tank body (2) provided on the base (1), a vacuum system (3) installed on the side wall of the tank body (2), a tank door (21) hingedly connected to the tank body (2), and an air circulator (4) provided on the end of the tank body (2) away from the tank door (21), characterized in that: A fixed support (5) is provided inside the tank body (2), an air-assisted circulation carriage (6) is movably provided on the fixed support (5), a product (9) is provided on the air-assisted circulation carriage (6), an air supply pipeline (7) is provided on the tank body (2) corresponding to the air-assisted circulation carriage (6), and a material transfer rack (8) is provided on the base (1) corresponding to the fixed support (5); The air-assisted circulation carriage (6) includes a cross frame (61), a vertical pole (62) is installed on the cross frame (61), a mesh plate (63) is installed at one end of the vertical pole (62), and the product (9) is placed on the mesh plate (63). A frame structure (64) is provided on both sides of the cross frame (61), and two mounting blocks (65) are longitudinally movably installed on the frame structure (64). The two mounting blocks (65) are respectively located on the upper and lower sides of the mesh plate (63). An air pipe (66) is fixedly inserted on each mounting block (65), and nozzles (67) are provided on the air pipe (66) at equal distances. The nozzles (67) are all aligned with the mesh plate (63). A flexible pipe (68) is installed on the end of the air pipe (66) away from the tank door (21), and a docking pipe (69) is provided at one end of the flexible pipe (68).

2. The Airbus aircraft cargo hold floor and skin preparation equipment according to claim 1, characterized in that: The frame structure (64) includes a slide bar (641), the cross-section of the slide bar (641) is a T-shaped structure, a return frame (642) is installed on the upper wall of the slide bar (641), a bracket (643) is installed on the outer wall of the return frame (642), the butt joint (69) is fixedly inserted on the bracket (643), a rotating shaft (644) is installed on the inner wall of the return frame (642), a first threaded rod (645) is installed at one end of the rotating shaft (644), and a second threaded rod (645) is installed at one end of the first threaded rod (645). The threaded rod (646) is provided with a thread direction opposite to that of the first threaded rod (645) and the second threaded rod (646). The two mounting blocks (65) are respectively movably mounted on the first threaded rod (645) and the second threaded rod (646) through threads. A driven bevel gear (647) is fixedly mounted on the rotating shaft (644). A guide rod (648) is movably mounted on the two mounting blocks (65). The guide rod (648) is fixedly mounted on the return frame (642). An adjustment component (649) is also provided on the slide bar (641).

3. The Airbus aircraft cargo hold floor and skin preparation equipment according to claim 2, characterized in that: The adjustment assembly (649) includes a slot box (6491), the slot box (6491) is mounted on the slide bar (641), a hand lever (6492) is movably mounted on the slot box (6491), a side shaft (6493) is movably mounted on the side wall of the slot box (6491), one end of the side shaft (6493) is located outside the slot box (6491) and is fixedly sleeved with a driving bevel gear (6494), the driving bevel gear (6494) and the driven bevel gear (647) are meshed with each other, one end of the side shaft (6493) is located inside the slot box (6491) and is fixedly sleeved with a worm gear (6495), and a worm gear (6496) is provided on the hand lever (6492) and is matched with the worm gear (6495).

4. The Airbus aircraft cargo hold floor and skin preparation equipment according to claim 1, characterized in that: The gas supply pipeline (7) comprises four connecting pipes (71), the four connecting pipes (71) being inserted into one end of the tank body (2) away from the tank door (21), and each of the four connecting pipes (71) being provided with a check valve (72). A U-shaped pipe (73) is installed at one end of the four connecting pipes (71) located outside the tank body (2), and a hot air valve (74) and a cold air valve (75) are installed on the U-shaped pipe (73).

5. The Airbus aircraft cargo hold floor and skin preparation equipment according to claim 3, characterized in that: The fixed support (5) comprises a concave frame (51), the concave frame (51) is fixedly mounted on the inner wall of the tank body (2), two fixed guide bars (52) are mounted on the upper wall of the concave frame (51), the cross section of each fixed guide bar (52) is a concave structure, the sliding bar (641) is movably inserted into the fixed guide bar (52), and the ends of the two fixed guide bars (52) away from the tank door (21) are closed structures.

6. The Airbus aircraft cargo hold floor and skin preparation equipment according to claim 1, characterized in that: The material moving rack (8) includes two first screw modules (81), the two first screw modules (81) are symmetrically mounted on the base (1), a connecting rod (82) is mounted between the movable ends of the two first screw modules (81), an electric push rod (83) is mounted on the connecting rod (82), a second screw module (84) is mounted on the telescopic end of the electric push rod (83), two blocking columns (85) are mounted on the movable end of the second screw module (84), the minimum distance between the two blocking columns (85) is greater than the width of the horizontal frame (61), a vertical frame (86) is mounted on the movable end of each first screw module (81), an extension bar (87) is mounted on the vertical frame (86), and the cross-sectional shape of the extension bar (87) is the same as that of the fixed guide bar (52).

7. The Airbus aircraft cargo hold floor and skin preparation equipment according to claim 1, characterized in that: The air circulator (4) includes a buckle cover (41), which is installed on the inner wall of one end of the tank body (2), a cooling water pipe (42) is inserted into the buckle cover (41), and the cooling water pipe (42) passes through the upper wall of the tank body (2), an electric heating wire (43) is installed inside the buckle cover (41), and a motor (44) is installed at one end of the outer wall of the tank body (2), a driving end of the motor (44) is movably inserted into the tank body (2), and a fan blade (45) is installed at the driving end of the motor (44).

8. The Airbus aircraft cargo hold floor and skin preparation equipment according to claim 2, characterized in that: A push rod (22) is installed on the inner wall surface of the tank door (21), and a buffer block (23) is installed on one end of the push rod (22). The buffer block (23) is arranged corresponding to the return frame (642).

9. A skin preparation process, applied to the preparation equipment according to claim 1, characterized in that: The product (9) includes a bottom mold (11) and a top mold (12), and a plurality of breathable molds (13) are arranged between the bottom mold (11) and the top mold (12), each of the breathable molds (13) is composed of a whole plate mold (131), a C-shaped support steel bar (132) and a steel perforated plate (133), the upper wall of the steel perforated plate (133) is adhered with a breathable cloth (14), the upper wall of the breathable cloth (14) is adhered with a skin material (15), and the bottom mold (11) is adhered with a first vacuum bag (16).

10. A floor preparation process, applied to the preparation equipment according to claim 1, characterized in that: The product (9) comprises a supporting mold (91) and a second vacuum bag (92); a floor material is provided on the supporting mold (91) and inside the second vacuum bag (92); the floor material is composed of an upper skin (93) and a lower skin (940); The upper skin (93) includes an upper skin layer (931), a second upper skin layer (932), a third upper skin layer (933), a fourth upper skin layer (934), and a fifth upper skin layer (935); The lower skin (940) includes a lower skin layer (941) and a lower second skin layer (942); An upper frosted layer (94) is provided on the upper layer (931) of the skin, and a lower frosted layer (95) is provided on the lower layer (941) of the skin, wherein the lower frosted layer (95) and the supporting mold (91) are bonded to each other; A lower adhesive film (96) is provided on the lower two layers (942) of the skin, an upper adhesive film (97) is provided on the upper five layers (935) of the skin, an aramid paper honeycomb layer (98) is provided between the lower adhesive film (96) and the upper adhesive film (97), an edge of the aramid paper honeycomb layer (98) is provided with edge sealing glue (99), and a sidewall strip (910) is provided on the supporting mold (91) and around the product (9).

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