An airbus aircraft cargo floor and skin preparation apparatus and process

Abstract

The application discloses an Airbus aircraft cargo compartment floor and skin preparation equipment and process, including base, the base is provided with jar body, the vacuum system is installed on the lateral wall surface of jar body, the jar door is hinged on the jar body, the application relates to the field of aircraft floor thermosetting forming technology, the beneficial effect of the application is that when the product needs to be heated or cooled, on the basis of the air circulator working, the high-temperature or low-temperature gas is made to act on the product from the air auxiliary circulation frame car through the air supply pipeline, the heat conduction path of the large-volume jar body is shortened, the problems that the temperature change speed is slow when the traditional hot press jar only depends on the whole circulation of the jar body, and the temperature difference between the central region and the edge is large due to the large product volume are overcome, the temperature distribution uniformity is improved, after the product thermosetting is completed, the air auxiliary circulation frame car and the product do not need manual movement through the material moving frame work, and the working difficulty is reduced.

Description

Technical Field

[0001] This invention relates to the field of aircraft floor thermosetting molding technology, and in particular to an equipment and process for preparing Airbus aircraft cargo cabin floor and skin. Background Technology

[0002] Currently, cargo hold floors in commercial aircraft generally use a honeycomb sandwich composite material structure. The skin is usually made of fiberglass, and the core layer is usually made of aramid paper honeycomb layer to achieve the goals of light weight, high strength, and high rigidity. However, cargo hold floors are susceptible to damage from impacts, scratches, and other external forces during use, requiring frequent replacement. However, original Boeing or Airbus cargo hold floors are expensive, have long supply cycles, and face the risk of supply disruptions due to issues such as the pandemic and trade frictions.

[0003] Autoclaves are required in the fabrication of aircraft cargo hold floors and skins, and existing technologies involved include:

[0004] 1. A composite device for a bulletproof insert in an autoclave, disclosed in CN116160698B, comprising: a base plate, an autoclave body, a door, a movable autoclave worktable, 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; a door is provided on one side of the autoclave body; a movable autoclave worktable is provided at the bottom of the autoclave body; a heating and cooling mechanism is also provided inside the autoclave body; a sealing frame is provided above the movable autoclave worktable; and a vacuum mechanism is provided below the movable autoclave worktable.

[0005] 2. CN109519540B A tank and an autoclave; the tank includes a body, a first partition, a heating component and a ventilation component, the body has a cavity with an opening at one 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 component is disposed in the second chamber, and the ventilation component is connected to the end of the body away from the opening, the ventilation component is used to allow air to circulate between the first chamber and the second chamber;

[0006] Due to the large size of cargo hold floors in civil aircraft, in the aforementioned prior art, the components used to promote airflow are all located at one end of the autoclave. During the heating and cooling stages, this results in an excessively long air circulation path inside the autoclave. Areas far from the ventilation end are prone to forming temperature gradients, affecting the uniformity of heating and cooling of the aircraft cargo hold floor. This directly impacts the material curing quality and structural performance. Furthermore, the autoclave's worktable requires manual pushing and pulling by operators. Due to the heavy weight of the large-sized floor, pushing and pulling becomes difficult, leading to low operational efficiency. In view of this, in-depth research was conducted to address the aforementioned problems, resulting in this case. Summary of the Invention

[0007] The purpose of this invention is to solve the above-mentioned problems by designing an equipment and process for preparing Airbus aircraft cargo hold floor and skin. This invention addresses the issue that during skin fabrication, the gas generated by the condensation reaction is difficult to expel, easily leading to air bubbles on the surface of the skin material and affecting skin quality. Therefore, to prevent air bubbles in mass-produced skins, aircraft floor manufacturers typically prepare only one floor skin in a single thermosetting process, resulting in low work efficiency. Furthermore, in existing autoclaves, the components promoting airflow are all located at one end of the autoclave. During the heating and cooling stages, this leads to an excessively long air circulation path within the autoclave, easily creating temperature gradients in areas far from the ventilation end, affecting the uniformity of heating and cooling of the aircraft cargo hold floor, directly impacting the material's curing quality and structural performance. Additionally, the autoclave's worktable requires manual pushing and pulling by operators, which is difficult due to the weight of large-sized floor panels, resulting in low operational efficiency.

[0008] The technical solution of the present invention to achieve the above objectives is as follows: an equipment for preparing cargo hold floor and skin of an Airbus aircraft, comprising a base, a tank body disposed on the base, a vacuum system installed on the side wall of the tank body, a tank door hinged to the tank body, an air circulator disposed on the end of the tank body away from the tank door, a fixed support disposed inside the tank body, an air-assisted circulation trolley movably disposed on the fixed support, a product disposed on the air-assisted circulation trolley, an air supply pipeline disposed on the tank body corresponding to the air-assisted circulation trolley, and a material transfer rack disposed on the base corresponding to the fixed support;

[0009] The air-assisted circulation rack includes a crossbeam with uprights mounted on it. A mesh plate is mounted on one end of each upright, and the product is placed on the mesh plate. Frame structures are provided on both sides of the crossbeam, and two mounting blocks are longitudinally and movably mounted on each frame structure. The two mounting blocks are located on the upper and lower sides of the mesh plate, respectively. An air pipe is fixedly inserted into each mounting block, and nozzles are evenly spaced on the air pipes, all of which are aligned with the mesh plate. A flexible tube is installed on the end of the air pipe away from the tank door, and a connecting pipe is provided at one end of the flexible tube.

[0010] Preferably, the frame structure includes a slide bar with a T-shaped cross-section. A U-shaped frame is mounted on the upper wall of the slide bar, and a bracket is mounted on the outer wall of the U-shaped frame. The connecting pipe is fixedly inserted into the bracket. A rotating shaft is mounted on the inner wall of the U-shaped frame. A first threaded rod is mounted on one end of the rotating shaft, and a second threaded rod is mounted on the other end of the first threaded rod. The threads of the first threaded rod and the second threaded rod have opposite directions. Two mounting blocks are respectively threadedly fitted onto the first threaded rod and the second threaded rod. A driven bevel gear is fixedly mounted on the rotating shaft. Guide rods are movably inserted into the two mounting blocks. The guide rods are fixedly mounted on the U-shaped frame. An adjustment component is also provided on the slide bar.

[0011] Preferably, the adjusting assembly includes a slot box, which is mounted on a slide bar. A lever is movably inserted into the slot box, and a side shaft is movably inserted into the side wall of the slot box. A drive bevel gear is fixedly fitted at one end of the side shaft outside the slot box, and the drive bevel gear meshes with the driven bevel gear. A worm gear is fixedly fitted at one end of the side shaft inside the slot box, and a worm is provided on the lever that matches the worm gear.

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

[0013] Preferably, the fixed support includes a concave frame, which is fixedly installed on the inner wall of the tank. 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 slide bar is movably inserted into the fixed guide bar. The ends of the two fixed guide bars away from the tank door are closed structures.

[0014] Preferably, the transfer rack includes two first lead screw modules, which are symmetrically mounted on the base. A connecting rod is installed between the moving ends of the two first lead screw modules, and an electric push rod is mounted on the connecting rod. A second lead screw module is mounted on the telescopic end of the electric push rod. Two stop posts are installed on the moving end of the second lead screw module. The minimum distance between the two stop posts is greater than the width of the crossbar. A vertical frame is installed on the moving end of each first lead screw module, and an extension bar is installed on the vertical frame. 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 cover, which is installed on the inner wall of one end of the tank. A cooling water pipe is inserted into the cover and passes through the upper wall of the tank. An electric heating wire is installed inside the cover. A motor is installed at one end of the outer wall of the tank. The drive end of the motor is movably inserted into the tank and a fan blade is installed at the drive end of the motor.

[0016] Preferably, a top rod is installed on the inner wall of the tank door, and a buffer block is installed at one end of the top rod, with the buffer block corresponding to the U-shaped frame.

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

[0018] The upper skin includes an upper skin layer, an upper skin layer two, an upper skin layer three, an upper skin layer four, and an upper skin layer five.

[0019] The lower skin includes a lower layer of skin and a 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. The lower frosted layer is in close contact with the supporting mold.

[0021] A lower adhesive film is provided on the two lower layers of the skin, an upper adhesive film is provided on the five upper layers of the skin, an aramid paper honeycomb layer is provided between the lower adhesive film and the upper adhesive film, and an edge sealing adhesive is provided on the edge of the aramid paper honeycomb layer;

[0022] The mold is provided with edge strips around the product.

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

[0024] A flooring manufacturing process, wherein the product includes a support mold and a second vacuum bag, and flooring material is disposed on the support mold and inside the second vacuum bag, the flooring material being composed of an upper skin and a lower skin;

[0025] The upper skin includes an upper skin layer, an upper skin layer two, an upper skin layer three, an upper skin layer four, and an upper skin layer five.

[0026] The lower skin includes a lower layer of skin and a 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. The lower frosted layer is in close contact with the supporting mold.

[0028] A lower adhesive film is provided on the two lower layers of the skin, an upper adhesive film is provided on the five upper layers of the skin, an aramid paper honeycomb layer is provided between the lower adhesive film and the upper adhesive film, and an edge sealing adhesive is provided on the edge of the aramid paper honeycomb layer;

[0029] The supporting mold is provided with edge strips around the product.

[0030] The following steps are included in the fabrication of the skin and floor:

[0031] Step 1: Lay the top layer, top layer, top layer, top layer, and top layer of the skin at 0° and make a bag; Lay the bottom layer and bottom layer of the skin at 0° and make a bag.

[0032] Step 2: Using the Airbus aircraft cargo hold floor and skin preparation equipment, multiple upper skins and multiple lower skins are cured and molded separately;

[0033] Step 3: Use a transfer rack to remove the air-assisted circulation trolley and the skin products on it from the autoclave. Use an overhead crane to transfer the air-assisted circulation trolley and the skin products on it to the demolding area. Clean the vacuum auxiliary materials on the surface of the upper and lower skins in sequence and separate the multiple upper skins from the multiple lower skins.

[0034] Step 4: Use a pneumatic grinder with 240# sandpaper to roughen the film-coated surfaces of the upper and lower skins. Use a blower to clean the dust from the product surface, and use a lint-free cloth dampened with an appropriate amount of alcohol to clean any remaining dust.

[0035] Step 5: Attach the lower skin to the support mold, lay the adhesive film on the adhesive surface of the lower skin, overlap the adhesive film, lay the aramid paper honeycomb layer in the center of the lower skin, fill the edge sealing glue in the marked area on the aramid paper honeycomb layer, lay the adhesive film on the aramid paper honeycomb layer, overlap the adhesive film, then lay the upper skin, then place the MDF edge strip on the edge of the upper skin, and then lay the non-porous isolation film, breathable felt, and vacuum bag film vacuum auxiliary materials in sequence to complete the bag making of the flooring product;

[0036] Step 6: Use the Airbus aircraft cargo hold floor and skin preparation equipment to cure and mold the floor products, stack multiple floor products, and cure and mold multiple floor products at the same time.

[0037] Step 7: Use a transfer rack to remove the air-assisted circulation trolley and the floor products on it from the autoclave. Use an overhead crane to transfer the air-assisted circulation trolley and the floor products on it to the demolding area. Clean the vacuum auxiliary materials off the surface of the floor products.

[0038] Step 8: Use a three-axis CNC machine tool to cut and punch holes in the product, print product labels, and paste them to a fixed position;

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

[0040] Step 10: Install the shock-absorbing pads according to the accompanying drawings.

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

[0042] 1. During the fabrication of the skin, adjacent skin materials are stacked together by a breathable mold covered with breathable cloth. Then, the first vacuum bag is vacuum-made. The gas generated during the condensation 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. C-shaped support steel strips are used to separate the whole plate mold and the steel perforated plate to discharge the gas generated during the condensation reaction of the skin material, prevent air bubbles in the skin material, and ensure the quality of the skin material. Multiple skin materials can be fabricated simultaneously in one vacuum bag making and curing process, which improves the production efficiency.

[0043] 2. After the skin and flooring materials are bagged, they are placed in an autoclave equipped with an air-assisted circulation trolley, air supply lines, and a transfer rack. The air-assisted circulation trolley has adjustable upper and lower pipes that allow for adjustment of the distance between the product and the air supply lines. The air supply lines provide high-temperature or low-temperature gas to the pipes in the air-assisted circulation trolley. When heating or cooling the product is required, the air supply lines allow the high-temperature or low-temperature gas to act on the product from the air-assisted circulation trolley at close range, shortening the heat conduction path of the large-volume autoclave. This overcomes the problems of slow temperature change and large temperature differences between the center and edges caused by the large product volume when traditional autoclaves rely solely on the overall circulation of the autoclave. This improves the uniformity of temperature distribution. After the product has been thermoset, the transfer rack allows the air-assisted circulation trolley and the product to be moved without manual intervention, reducing the workload. Attached Figure Description

[0044] Figure 1 This is a three-dimensional structural diagram from the main view of the Airbus aircraft cargo hold floor and skin manufacturing equipment described in this invention.

[0045] Figure 2 This is a rear-view three-dimensional structural diagram of the Airbus aircraft cargo hold floor and skin preparation equipment described in this invention.

[0046] Figure 3 This is a three-dimensional structural diagram of an air-assisted circulation frame for an Airbus aircraft cargo hold floor and skin preparation equipment as described in this invention.

[0047] Figure 4 This is a top view schematic diagram of the adjustment component of an Airbus aircraft cargo hold floor and skin preparation equipment according to the present invention.

[0048] Figure 5 This is a three-dimensional structural diagram of the adjustment component of the Airbus aircraft cargo hold floor and skin preparation equipment described in this invention, viewed from a bottom angle.

[0049] Figure 6 This is a top-view three-dimensional structural diagram of the transfer rack of the Airbus aircraft cargo hold floor and skin preparation equipment described in this invention.

[0050] Figure 7 This is a three-dimensional structural diagram of the transfer rack of the Airbus aircraft cargo hold floor and skin preparation equipment described in this invention, viewed from below.

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

[0052] Figure 9 This is a side view of the air circulator section of an equipment for preparing the cargo hold floor and skin of an Airbus aircraft according to the present invention.

[0053] Figure 10 This is a schematic diagram of the front cross-sectional structure of an Airbus aircraft cargo hold floor and skin manufacturing equipment 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 This is a top view of the C-shaped support steel strip in the skin manufacturing process described in this invention.

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

[0057] In the picture:

[0058] 1. Base;

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

[0060] 3. Vacuum system;

[0061] 4. Air circulator; 41. 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 circulating frame; 61. Horizontal frame; 62. Vertical pole; 63. Mesh panel;

[0064] 64. Frame structure; 641. Sliding 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. Drive bevel gear; 6495. Worm gear; 6496. Worm.

[0066] 65. Installation block; 66. Air hose; 67. Nozzle; 68. Flexible hose; 69. Connecting hose.

[0067] 7. Gas supply pipeline; 71. Connecting pipe; 72. Check valve; 73. U-tube; 74. Hot gas valve; 75. Cold gas valve.

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

[0069] 9. Products;

[0070] 11. Bottom mold, 12. Top mold, 13. Ventilation mold, 131. Plate mold, 132. C-shaped support steel bar, 133. Steel perforated plate, 14. Ventilation 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 adhesive; 910. Edge guard strip. Detailed Implementation

[0072] Example 1:

[0073] The present invention will now be described in detail with reference to the accompanying drawings, such as... Figure 1-10 As shown, an equipment for preparing the cargo hold floor and skin of an Airbus aircraft is provided.

[0074] Those skilled in the art should connect all electrical components and their compatible power supplies in this case via wires, and should select appropriate controllers according to actual conditions to meet control requirements. The specific connection and control sequence should refer to the working principle described below, where the electrical components are connected in sequence. The detailed connection methods are well-known in the art. The following mainly introduces the working principle and process, without explaining the electrical control.

[0075] An equipment for preparing cargo hold floor and skin of an Airbus aircraft includes a base 1, a tank 2 mounted on the base 1, a vacuum system 3 installed on the side wall of the tank 2, a tank door 21 hinged to the tank 2, an air circulator 4 mounted on the end of the tank 2 away from the tank door 21, a fixed support 5 inside the tank 2, an air-assisted circulation trolley 6 movably mounted on the fixed support 5, a product 9 mounted on the air-assisted circulation trolley 6, an air supply pipeline 7 mounted on the tank 2 corresponding to the air-assisted circulation trolley 6, and a material transfer rack 8 mounted 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 2, vacuum system 3, tank door 21, and air circulator 4 constitute a partial structure of the autoclave, which is existing technology. For the specific structure and working principle, please refer to the tank and autoclave disclosed in CN109519540B. The fixed support 5 is used to support the air-assisted circulation trolley 6, which is used to place the product 9 to be thermoset. The air supply pipeline 7 provides high-temperature or low-temperature gas to the air-assisted circulation trolley 6. When it is necessary to heat-set the product 9... When heating or cooling, based on the operation of the air circulator 4, high-temperature or low-temperature gas is brought from the air-assisted circulation rack 6 to the product 9 via the air supply pipeline 7, which shortens the heat conduction path of the large-volume tank 2. This overcomes the problem that the temperature change rate is slow when the traditional autoclave relies solely on the overall circulation of the tank 2, and the large temperature difference between the center and the edge caused by the large volume of the product 9. It improves the uniformity of temperature distribution. After the product 9 has been thermoset, the transfer rack 8 allows the air-assisted circulation rack 6 and the product 9 to be moved without manual intervention, reducing the difficulty of the work.

[0077] Specifically, the air-assisted circulation rack 6 includes a crossbeam 61, on which uprights 62 are installed. A mesh plate 63 is installed at one end of the uprights 62. The product 9 is placed on the mesh plate 63. Frame structures 64 are provided on both sides of the crossbeam 61. Two mounting blocks 65 are longitudinally and movably installed on the frame structures 64. The two mounting blocks 65 are located on the upper and lower sides of the mesh plate 63, respectively. An air pipe 66 is fixedly inserted into each mounting block 65. Nozzles 67 are arranged at equal intervals on the air pipe 66. The nozzles 67 are all aligned with the mesh plate 63. A flexible tube 68 is installed on the end of the air pipe 66 away from the tank door 21. A connecting tube 69 is provided at one end of the flexible tube 68.

[0078] It should be noted that in the initial state, the tank door 21 is open, the transfer rack 8 is connected to the fixed support 5, the air-assisted circulation rack 6 is located on the transfer rack 8, and the operator 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 air pipes 66 on the upper and lower sides are adjusted to the upper and lower parts of the product 9, and the nozzles 67 on the upper and lower sides are aligned with the top of the product 9 and the bottom of the mesh plate 63.

[0079] Specifically, the frame structure 64 includes a slide bar 641 with a T-shaped cross-section. A U-shaped frame 642 is installed on the upper wall of the slide bar 641. A bracket 643 is installed on the outer wall of the U-shaped frame 642. A connecting pipe 69 is fixedly inserted into the bracket 643. A rotating shaft 644 is installed on the inner wall of the U-shaped frame 642. A first threaded rod 645 is installed at one end of the rotating shaft 644, and a second threaded rod 646 is installed at the other end. The threads of the first threaded rod 645 and the second threaded rod 646 are opposite. Two mounting blocks 65 are respectively threadedly fitted onto the first threaded rod 645 and the second threaded rod 646. A driven bevel gear 647 is fixedly fitted onto the rotating shaft 644. Guide rods 648 are movably inserted into the two mounting blocks 65 and are fixedly installed on the U-shaped frame 642. An adjustment component 649 is also provided on the slide bar 641.

[0080] Specifically, the adjustment component 649 includes a slot box 6491, which is mounted on a slide bar 641. A lever 6492 is movably inserted into the slot box 6491. A side shaft 6493 is movably inserted into the side wall of the slot box 6491. A drive bevel gear 6494 is fixedly fitted at one end of the side shaft 6493 outside the slot box 6491. The drive bevel gear 6494 meshes with a driven bevel gear 647. A worm gear 6495 is fixedly fitted at one end of the side shaft 6493 inside the slot box 6491. A worm 6496 is provided on the lever 6492 that matches the worm gear 6495.

[0081] It should be noted that when operating the frame structure 64, the operator can rotate the lever 6492 on the slot box 6491. The worm gear 6496 on the lever 6492 will drive the worm wheel 6495, the side shaft 6493 and the driving bevel gear 6494 to rotate. The driven bevel gear 647 will drive 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 will drive the air pipes 66 on them to move closer or further apart. After the position of the air pipes 66 is adjusted, the transfer rack 8 will be operated to move the air-assisted circulation rack 6 from the transfer rack 8 to the fixed support 5 inside the tank 2. The connecting pipe 69 will be sealed and connected to the air supply line 7. Then the transfer rack 8 will work again to move the transfer rack 8 away from the fixed support 5. Then the tank door 21 will be closed.

[0082] Specifically, the gas supply line 7 includes four connecting pipes 71. The four connecting pipes 71 are inserted into the end of the tank body 2 away from the tank door 21. Each of the four connecting pipes 71 is equipped with a check valve 72. A U-shaped pipe 73 is installed at the end of the four connecting pipes 71 located outside the tank body 2. A hot gas valve 74 and a cold gas valve 75 are installed on the U-shaped pipe 73.

[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 connecting pipe 69 is sealed to the connecting pipe 71. When heating, the hot air valve 74 is opened, and the hot air enters the connecting pipe 69 through the check valve 72, and is blown to the product 9 from the nozzle 67 through the flexible pipe 68 and the air pipe 66. When cooling, the hot air valve 74 is closed, the cold air valve 75 is opened, and the cold air is blown to the product 9 from the nozzle 67.

[0084] Specifically, the fixed support 5 includes a concave frame 51, which is fixedly installed on the inner wall of the tank 2. Two fixed guide bars 52 are installed 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 two fixed guide bars 52 are closed at the end away from the tank door 21.

[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 surface of the slide bar 641 can be provided with a groove, and multiple 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 transfer rack 8 includes two first lead screw modules 81, which are symmetrically mounted on the base 1. A connecting rod 82 is installed between the moving ends of the two first lead screw modules 81. An electric push rod 83 is installed on the connecting rod 82. A second lead screw module 84 is installed on the telescopic end of the electric push rod 83. Two stop posts 85 are installed on the moving end of the second lead screw module 84. The minimum distance between the two stop posts 85 is greater than the width of the cross frame 61. A vertical frame 86 is installed on the moving end of each first lead screw module 81. An extension bar 87 is installed 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 lead screw module 81 and the second lead screw module 84 can be referenced from the linear motion module produced by Shenzhen Yutao Precision Technology Co., Ltd. When the tank body 2 and the tank door 21 are engaged, the moving ends of the two first lead screw modules 81 are at their extreme positions far away from the tank body 2, and the components installed on the moving ends of the two first lead screw modules 81 are far away from the tank body 2. When it is necessary to remove the air-assisted circulation trolley 6, the tank door 21 is opened, and the first lead screw module 81 works in the forward direction, causing the moving end of the first lead screw module 81 to move to its extreme position close to the tank body 2. At this time, the extension bar 87 and the fixed guide bar 5 2. The two stops 85 are moved into the tank 2 and aligned with the two sides of the crossbar 61 by the forward operation of the second screw module 84. The tops of the two stops 85 are raised above the crossbar 61 by the extension of the electric push rod 83. By the reverse operation of the second screw module 84, the air-assisted circulation carriage 6 is moved from the fixed guide bar 52 to the extension bar 87 under the matching of the two stops 85 and the crossbar 61. Then, by 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 are moved away from the tank 2.

[0088] The lower wall of the moving end of the first lead screw module 81 can also be provided with a groove, and multiple rollers are provided in the groove. The rollers are attached to the base 1 to support the lateral movement of the moving end of the first lead screw module 81.

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

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

[0091] Specifically, a top 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 top rod 22. The buffer block 23 is correspondingly set with the U-shaped frame 642.

[0092] It should be noted that after the tank door 21 is closed, the buffer block 23 abuts against the U-shaped frame 642 under the support of the top rod 22, which is used to ensure that the connecting pipe 69 and the connecting pipe 71 fit tightly. A sealing ring can be set on the connecting pipe 71 to ensure the sealing effect.

[0093] Example 2:

[0094] like Figure 11-12 As shown, a skin preparation process is described. Product 9 includes a bottom mold 11 and a top mold 12. Multiple 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 strip 132 and a steel perforated plate 133. A breathable cloth 14 is attached to the upper wall of the steel perforated plate 133, and a skin material 15 is attached to the upper wall of the breathable cloth 14. A first vacuum bag 16 is attached to the bottom mold 11.

[0095] It should be noted that during the fabrication of the skin, adjacent skin materials 15 are stacked together by a breathable mold 13 with a breathable cloth 14 laid on them. Then, the first vacuum bag 16 is vacuum-made. The gas generated during the polycondensation reaction of the skin material 15 enters between the whole plate mold 131 and the steel perforated plate 133 through the holes in the breathable cloth 14 and the steel perforated plate 133. The C-shaped support steel strip 132 is used to separate the whole plate mold 131 and the steel perforated plate 133 and to discharge the gas generated during the polycondensation reaction of the skin material 15, preventing air bubbles in the skin material 15 and ensuring the quality of the skin material 15. Multiple skin materials 15 can be fabricated simultaneously in one vacuum bag making and curing process, which improves the production efficiency. The breathable cloth 14 is made of a rigid and breathable fabric, which can both allow air to pass through and prevent the phenolic resin on the skin material 15 from entering the holes in the steel perforated plate 133, thus preventing blockage.

[0096] Example 3:

[0097] like Figure 13 As shown, a flooring manufacturing process is described. Product 9 includes a support mold 91 and a second vacuum bag 92. Flooring material is disposed on the support mold 91 and inside the second vacuum bag 92. The flooring material is composed of an upper skin 93 and a lower skin 940.

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

[0099] The lower skin 940 includes a lower layer 941 and a second lower 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 in close contact with the supporting mold 91.

[0101] A lower adhesive film 96 is provided on the second layer 942 of the skin, and an upper adhesive film 97 is provided on the fifth layer 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] A retaining strip 910 is provided on the supporting mold 91 and around the product;

[0103] It should be noted that when making the floor, multiple products can be stacked together using pad blocks and placed into the Airbus aircraft cargo hold floor and skin preparation equipment to make multiple floor panels at the same time.

[0104] Example 4:

[0105] Detailed operation steps:

[0106] Step 1, Making the skin material 15: Lay the skin layer 931, skin layer 932, skin layer 933, skin layer 934 and skin layer 935 at 0° and make the bag;

[0107] The upper skin 93 consists of 5 layers of prepreg, namely the first layer 931, the second layer 932, the third layer 933, the fourth layer 934, and the fifth layer 935. The thickness after curing is 1.3±0.1mm, and the laying direction is 0°. When laying the layers, a scraper is needed to remove the air between the layers of prepreg until there are no obvious air bubbles visible between the layers. Each layer is pre-compressed for bag making after laying. The wrinkles need to be flattened with a scraper or cut open.

[0108] After the initial layering is completed, release fabric, non-porous release film, breathable felt, and vacuum bag film are laid in sequence to complete the bag making process.

[0109] The lower layer 941 and the second layer 942 of the skin are laid at 0° and then bagged.

[0110] The lower skin 940 consists of two layers of prepreg, namely the first layer 941 and the second layer 942. The thickness after curing is 0.5±0.1mm, and the laying direction is 0°. When laying the layers, a scraper is needed to remove the air between the layers of prepreg until there are no obvious air bubbles visible between the layers. Each layer is pre-compressed for bag making, and the wrinkles need to be rolled flat with a scraper or cut open.

[0111] After the initial layering is completed, release fabric, non-porous release film, breathable felt, and vacuum bag film are laid in sequence to complete the bag making process.

[0112] Step 2, Curing of skin material 15: Multiple upper skins 93 and multiple lower skins 940 are cured and molded separately using the Airbus aircraft cargo hold floor and skin preparation equipment;

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

[0114] First stage of heating: Heat to 60℃ and evacuate the vacuum for 30 minutes;

[0115] Second stage of heating and holding: Heat to 120℃ and pressurize to 0.1MPa, hold for 60 minutes;

[0116] Three-stage heating and holding: heat up to 150℃, pressurize to 0.3MPa, and hold for 90 minutes;

[0117] Three-stage cooling: Cool down to room temperature at a rate of 2-3℃ / min, and release pressure when the temperature is <60℃;

[0118] Step 3, Demolding: Use the transfer rack 8 to remove the air-assisted circulation trolley 6 and the skin products on it from the autoclave. Use an overhead crane to transfer the air-assisted circulation trolley 6 and the skin products on it to the demolding area. Clean the vacuum auxiliary materials on the surfaces of the upper skin 93 and lower skin 940 in sequence, and separate the multiple upper skins 93 and multiple lower skins 940. During the demolding operation, it is forbidden to scratch the product 9 or bend the product 9 at a large angle.

[0119] Step 4, Grinding: Use a pneumatic grinder with 240# sandpaper to roughen the film-coated surfaces of the upper skin 93 and lower skin 940. Use a blower to clean the dust from the surface of product 9. Use a lint-free cloth dampened with an appropriate amount of alcohol to clean any remaining dust. During the grinding process, do not scratch product 9 or bend product 9 at large angles.

[0120] Step 5, Flooring Material Production: Attach the lower skin 940 to the support mold 91. Lay the lower adhesive film 96 on the adhesive side of the lower skin 940, overlapping the lower adhesive film 96 with an overlap of ≤10mm. Place the aramid paper honeycomb layer 98 in the center of the lower skin 940. Fill the marked area with edge sealant 99 on the aramid paper honeycomb layer 98. Press the edge sealant 99 flat and compact it, ensuring no gaps in the filled area. Lay the upper adhesive film 97 on the aramid paper honeycomb layer 98, overlapping the upper adhesive film 97. During the filling process, pay attention to the pressure to prevent the aramid paper honeycomb layer 98 from sinking. Then lay the upper skin 93. Next, place a 17±1mm high MDF edge strip 910 along the edge of the upper skin 93. Finally, lay the non-porous isolation film, breathable felt, and vacuum bag film vacuum auxiliary materials to complete the flooring product bag making.

[0121] Step 6, Adhesive Curing: The floor products are cured and molded using the Airbus aircraft cargo hold floor and skin preparation equipment. Multiple floor products are stacked and cured simultaneously.

[0122] First stage of heating: Heat to 60℃ and evacuate the vacuum for 30 minutes;

[0123] Second stage of heating and holding: Heat to 120℃ and pressurize to 0.1MPa, hold for 60 minutes;

[0124] Three-stage heating and holding: heat up to 150℃, pressurize to 0.3MPa, and hold for 90 minutes;

[0125] Three-stage cooling: Cool down to room temperature at a rate of 2-3℃ / min, and release pressure when the temperature is <60℃;

[0126] Step 7: Use the transfer rack 8 to remove the air-assisted circulation rack 6 and the floor products on it from the autoclave. Use the overhead crane to transfer the air-assisted circulation rack 6 and the floor products on it to the demolding area. Clean the vacuum auxiliary materials on the surface of the floor products. During the demolding operation, do not 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 holes in product 9, print the product 9 label, and paste it to the fixed position;

[0128] Step 9: Embedded parts: Carry out the embedded parts work according to the supporting drawings;

[0129] Step 10, Paste: Paste the shock-absorbing pads according to the accompanying drawings; after pasting, the shock-absorbing pads should be straight, flat and without bending or deformation.

[0130] Example 5:

[0131] When making flooring, a custom press method can also be used for molding:

[0132] Step 1: Use a custom press mold with upper and lower constant temperature heating plates. Its temperature control accuracy is ±2℃, pressure control is 0~1MPa, and it is designed with a vacuum channel and an air-proof layer.

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

[0134] Step 3: Start the press for a single synchronous heating and pressing operation. The temperature rise curve should match the curing curve of the phenolic resin.

[0135] Step 4: Heat to 150℃, pressurize to 0.5MPa, and hold for 90 minutes;

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

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

Claims

1. An equipment for preparing cargo hold floor and skin of an Airbus aircraft, comprising a base (1), a tank (2) disposed on the base (1), a vacuum system (3) installed on the side wall of the tank (2), a tank door (21) hinged to the tank (2), and an air circulator (4) disposed on the end of the tank (2) away from the tank door (21), characterized in that, The tank (2) is provided with a fixed support (5), and an air-assisted circulation trolley (6) is movably mounted on the fixed support (5). The air-assisted circulation trolley (6) is provided with a product (9). An air supply pipeline (7) is provided on the tank (2) corresponding to the air-assisted circulation trolley (6). A material transfer rack (8) is provided on the base (1) corresponding to the fixed support (5). The air-assisted circulation rack (6) includes a cross frame (61), on which a vertical pole (62) is installed. A mesh plate (63) is installed at one end of the vertical pole (62). The product (9) is placed on the mesh plate (63). Frame structures (64) are provided on both sides of the cross frame (61). Two mounting blocks (65) are longitudinally and movably installed on the frame structure (64). The two mounting blocks (65) are located on the upper and lower sides of the mesh plate (63), respectively. An air pipe (66) is fixedly inserted into each mounting block (65). Nozzles (67) are arranged at equal intervals on the air pipe (66). The nozzles (67) are all aligned with the mesh plate (63). A flexible tube (68) is installed on the end of the air pipe (66) away from the tank door (21). A connecting pipe (69) is provided at one end of the flexible tube (68).

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

3. The equipment for manufacturing the cargo hold floor and skin of an Airbus aircraft according to claim 2, characterized in that, The adjustment assembly (649) includes a slot box (6491), which is mounted on a slide bar (641). A lever (6492) is movably inserted into the slot box (6491). A side shaft (6493) is movably inserted into the side wall of the slot box (6491). A drive bevel gear (6494) is fixedly fitted at one end of the side shaft (6493) outside the slot box (6491). The drive bevel gear (6494) meshes with a driven bevel gear (647). A worm gear (6495) is fixedly fitted at one end of the side shaft (6493) inside the slot box (6491). A worm (6496) is provided on the lever (6492) to match the worm gear (6495).

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

5. The equipment for manufacturing the cargo hold floor and skin of an Airbus aircraft according to claim 3, characterized in that, The fixed support (5) includes a concave frame (51), which is fixedly installed on the inner wall of the tank (2). Two fixed guide bars (52) are installed 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 two fixed guide bars (52) are closed at the end away from the tank door (21).

6. The equipment for manufacturing the cargo hold floor and skin of an Airbus aircraft according to claim 1, characterized in that, The transfer rack (8) includes two first lead screw modules (81), which are symmetrically mounted on the base (1). A connecting rod (82) is installed between the moving ends of the two first lead screw modules (81). An electric push rod (83) is installed on the connecting rod (82). A second lead screw module (84) is installed on the telescopic end of the electric push rod (83). Two stop posts (85) are installed on the moving end of the second lead screw module (84). The minimum distance between the two stop posts (85) is greater than the width of the cross frame (61). A vertical frame (86) is installed on the moving end of each first lead screw module (81). An extension bar (87) is installed 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).

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

8. The equipment for manufacturing the cargo hold floor and skin of an Airbus aircraft according to claim 2, characterized in that, A top 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 top rod (22). The buffer block (23) is correspondingly set with the U-shaped frame (642).

9. A skin preparation process, applied to the preparation equipment described in claim 1, characterized in that, The product (9) includes a bottom mold (11) and a top mold (12). Multiple breathable molds (13) are provided 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 strip (132) and a steel perforated plate (133). A breathable cloth (14) is attached to the upper wall of the steel perforated plate (133). A skin material (15) is attached to the upper wall of the breathable cloth (14). A first vacuum bag (16) is attached to the bottom mold (11).

10. A flooring manufacturing process, applied to the manufacturing equipment described in claim 1, characterized in that, The product (9) includes a support mold (91) and a second vacuum bag (92). A floor material is provided on the support 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), an upper skin layer two (932), an upper skin layer three (933), an upper skin layer four (934), and an upper skin layer five (935). The lower skin (940) includes a lower layer (941) and a lower second 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, and the lower frosted layer (95) is in contact with the supporting mold (91); A lower adhesive film (96) is provided on the lower two layers (942) of the skin, and 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 sealing adhesive (99) is provided on the edge of the aramid paper honeycomb layer (98). An edge guard strip (910) is provided on the support mold (91) and around the product (9).

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