Anti-wind unmanned aerial vehicle fuselage composite material mold forming device

Abstract

The application discloses an anti-wind unmanned aerial vehicle body composite material mould pressing forming device, which comprises a fixed workbench, a lower mould is installed above the fixed workbench, an upper mould is arranged above the lower mould, a mounting base is installed on the fixed workbench, a lifting mechanism is arranged on the mounting base, the output end of the lifting mechanism is connected with the upper mould, and the upper mould is driven by the lifting mechanism to realize separation from the lower mould and mould pressing; heating mechanisms and cooling setting mechanisms are arranged in the upper mould and the lower mould; the lower mould is provided with a concave cavity for forming an anti-wind reinforcing rib; and an air exhaust port is arranged on the cavity side wall of the lower mould. The application belongs to the technical field of unmanned aerial vehicle composite material processing equipment, and effectively solves the problems of poor mould opening and closing positioning, low cold and hot switching efficiency, easy production of bubble defects of products and the fact that the wind resistance performance of the formed body cannot be guaranteed.

Description

Technical Field

[0001] This invention belongs to the technical field of composite material processing equipment for unmanned aerial vehicles (UAVs), specifically referring to a wind-resistant UAV fuselage composite material molding device. Background Technology

[0002] Wind-resistant drone fuselages are generally made of carbon fiber and fiberglass composite materials. The fuselage requires a structure of longitudinal and transverse reinforcing ribs to improve the overall rigidity of the fuselage and reduce the risk of shaking and cracking in strong winds. Composite material fuselages are mostly made using a molding and thermosetting process, in which prepreg is laid inside a mold, and then the mold is closed, heated, and pressurized to cure the finished fuselage.

[0003] Existing drone fuselage compression molding equipment still has the following shortcomings in actual use: First, the positioning accuracy of mold lifting and opening is poor, and mold misalignment can easily cause uneven fuselage wall thickness and material shortage at the reinforcing rib positions, directly reducing the wind resistance of the fuselage; Second, heating and cooling are arranged separately and independently, and the mold cooling and shaping speed is slow after heat curing, resulting in a long production cycle; Third, air inside the molding cavity cannot be fully discharged, and air bubbles are prone to occur inside the product. Air bubbles will significantly reduce the strength of the composite material fuselage and are prone to breakage and failure under high wind conditions. Summary of the Invention

[0004] The technical problem to be solved by the present invention is that the existing composite material molding device for UAV fuselage has poor mold opening and closing positioning, low efficiency of hot and cold switching, and the product is prone to air bubble defects, and the wind resistance performance of the molded fuselage cannot be guaranteed.

[0005] The technical solution adopted in this invention is as follows: The present invention proposes a wind-resistant drone fuselage composite material molding device, including a fixed worktable, a lower mold installed above the fixed worktable, an upper mold provided above the lower mold, an installation base installed on the fixed worktable, a lifting mechanism provided on the installation base, the output end of the lifting mechanism being connected to the upper mold, and the upper mold being driven by the lifting mechanism to separate from and close the lower mold. The upper and lower molds are both equipped with integrated heating and cooling / shaping mechanisms. The lower mold has a concave cavity for forming wind-resistant reinforcing ribs. The cavity sidewall of the lower mold has an exhaust port, which is connected to an external vacuum pumping assembly. An electrical control cabinet is installed on one side of the fixed workbench. The electrical control cabinet is electrically connected to the lifting mechanism, heating mechanism, cooling / shaping mechanism, and vacuum pumping assembly.

[0006] Furthermore, the lifting mechanism includes a hydraulic cylinder, the cylinder body of which is fixedly installed on the top of the mounting base, the lower end of the piston rod of the hydraulic cylinder is fixedly connected to the top plate of the upper mold, and a guide column fixedly connected to the upper mold is slidably provided on the mounting base.

[0007] Furthermore, the heating mechanism includes multiple electric heating tubes and thermocouple temperature probes. The electric heating tubes are embedded inside the mold base of the upper and lower molds, and the thermocouple temperature probes are arranged around the mold cavity of the lower mold and the mounting base. Both the electric heating tubes and the thermocouple temperature probes are electrically connected to the electrical control cabinet.

[0008] Furthermore, the cooling and shaping mechanism includes cooling channels formed inside the upper mold and lower mold base, a pump is installed on the fixed workbench, the liquid outlet of the pump is connected to a diversion pipe, and the diversion pipe is connected to the cooling channels through a liquid inlet pipe.

[0009] Furthermore, a coolant circulation tank is installed on the side of the fixed workbench, and the other end of the cooling channel is connected to the coolant circulation tank through a return pipe. The coolant circulation tank is connected to the pump inlet end through a supply pipe. Both the inlet pipe and the return pipe are equipped with telescopic flexible hoses.

[0010] Furthermore, heat dissipation fins are bolted to the side of the coolant circulation tank.

[0011] Furthermore, the vacuum pumping assembly includes a vacuum pump fixed to a fixed workbench, the inlet end of the vacuum pump is connected to a vacuum pipeline, the end of the vacuum pipeline away from the vacuum pump is connected to the exhaust port, and a vacuum pressure sensor is installed on the vacuum pipeline.

[0012] Furthermore, a demolding ejection mechanism is installed on the fixed worktable. The demolding ejection mechanism includes an ejection cylinder. The output end of the ejection cylinder is connected upward to an ejection plate. Multiple sets of ejector rods are provided on the ejection plate, and the upper end extends into the concave cavity of the lower mold.

[0013] The beneficial effects achieved by the present invention using the above structure are as follows: 1. A lifting mechanism is set up to drive the upper mold to lift and open to realize the mold opening and closing. With the help of guide pillars, the mold closing positioning accuracy is high, ensuring uniform wall thickness of the machine body. The mold integrates a heating mechanism and a cooling and shaping mechanism. During the curing stage, the electric heating tube heats up and maintains pressure. After curing, cooling water is introduced into the cooling channel for rapid cooling and shaping. The integrated heating and cooling system shortens the production cycle.

[0014] 2. A vacuum extraction component is installed to extract air from the cavity during the mold closing process, eliminating air bubbles in the composite material, improving the mechanical strength of the machine body, and reducing the risk of cracking under high wind conditions. 3. Equipped with a demolding and ejection mechanism, after the upper mold is lifted and opened after molding, the ejector rod pushes the finished machine body out of the cavity as a whole, avoiding tearing and damage to the thin-walled machine body caused by manual prying. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the present invention; Figure 2 This is a schematic diagram of the overall structure from another perspective of an embodiment of the present invention; Figure 3 This is a schematic diagram of the coolant circulation tank. Figure 4 This is a schematic diagram of the demolding and ejection mechanism.

[0016] The components include: 1. Fixed worktable; 11. Lower mold; 12. Upper mold; 13. Mounting base; 14. Hydraulic cylinder; 15. Guide column; 2. Pump; 21. Diversion pipeline; 3. Coolant circulation tank; 31. Return pipeline; 4. Heat dissipation fins; 5. Vacuum pump; 51. Vacuum pipeline; 6. Ejector cylinder; 61. Ejector plate; 62. Ejector rod. Detailed Implementation

[0017] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0018] It should be noted that the terms “front,” “back,” “left,” “right,” “up,” and “down” used in the following description refer to the directions shown in the attached diagram, while the terms “inside” and “outside” refer to the directions toward or away from the geometric center of a specific component, respectively.

[0019] Example 1: like Figure 1-4 As shown, the present invention proposes a composite material molding device for wind-resistant UAV fuselage, comprising a fixed worktable 1, on which a lower mold 11 is installed. The lower mold 11 is directly positioned and fixed on the surface of the fixed worktable 1 to ensure that the lower mold 11 will not shift or shake during the molding process. An upper mold 12 is provided above the lower mold 11. An installation base 13 is installed on the fixed worktable 1, and a lifting mechanism is provided on the installation base 13. The output end of the lifting mechanism is connected to the upper mold 12. The upper mold 12 is driven by the lifting mechanism to separate from and close the lower mold 11. When the lifting mechanism extends, it moves the upper mold 12 downward to fit the lower mold 11 to complete the mold closing and pressing, providing molding pressure for composite material molding. When the lifting mechanism retracts, it lifts the upper mold 12 upward to separate the upper mold 12 from the lower mold 11, providing operating space for laying composite prepreg and removing the molded workpiece. Both the upper mold 12 and the lower mold 11 integrate heating and cooling mechanisms. The heating mechanism is responsible for heating and curing the composite material during the molding process, while the cooling mechanism rapidly cools the mold after curing. This integrates heating and cooling functions within the same mold base, eliminating the need to disassemble or replace external temperature control fixtures. The lower mold 11 has a concave cavity for forming wind-resistant reinforcing ribs. The contour of the concave cavity matches the outer contour of the wind-resistant drone fuselage. The cavity has a pre-reserved reinforcing rib forming structure, allowing for the direct, integral forming of the longitudinal and transverse reinforcing ribs on the inner side of the fuselage during molding. This improves the overall wind-resistant rigidity of the drone fuselage after molding and avoids the need for later bonding of reinforcing rib strips. The problem of insufficient connection strength is addressed by: The lower mold 11 has an exhaust port on its cavity sidewall, which is connected to an external vacuum extraction component. During mold closing, the vacuum extraction component can extract the air trapped inside the concave cavity and between the composite material layers, effectively eliminating air bubble defects inside the molded product and preventing cracking failure of the machine body under strong wind conditions; An electrical control cabinet is installed on one side of the fixed worktable 1, which is electrically connected to the lifting mechanism, heating mechanism, cooling and shaping mechanism, and vacuum extraction component. As the control center of the entire machine, the electrical control cabinet can uniformly control the start and stop of each component, achieving centralized control of pressure, temperature, vacuum degree, and action sequence.

[0020] The lifting mechanism includes a hydraulic cylinder 14, the cylinder body of which is fixedly installed on the top of the mounting base 13. The lower end of the piston rod of the hydraulic cylinder 14 is fixedly connected to the top plate of the upper mold 12. A guide post 15 is slidably provided on the mounting base 13 and fixedly connected to the upper mold 12. The guide post 15 slides up and down synchronously with the upper mold 12, which plays a guiding and limiting role in the mold closing process of the upper and lower molds 11, preventing the upper mold 12 from shifting horizontally and ensuring the mold closing alignment accuracy.

[0021] The heating mechanism includes multiple electric heating tubes and thermocouple temperature probes. The electric heating tubes are embedded inside the mold base of the upper mold 12 and the lower mold 11. After being powered on, the electric heating tubes generate heat to heat the entire mold, providing the required temperature conditions for the curing of the composite resin. The thermocouple temperature probes are arranged around the mold cavity of the lower mold 11 and the mounting base 13, and can collect the actual temperature of the mold cavity area in real time. The electric heating tubes and thermocouple temperature probes are electrically connected to the electrical control cabinet.

[0022] The cooling and shaping mechanism includes cooling channels formed inside the upper mold 12 and lower mold 11. The cooling channels are arranged in a meandering manner inside the mold to increase the heat exchange contact area and improve the heat exchange efficiency. A pump 2 is installed on the fixed workbench 1. The outlet end of the pump 2 is connected to a diversion pipe 21. The diversion pipe 21 is connected to the cooling channels through an inlet pipe. A coolant circulation tank 3 is installed on the side of the fixed workbench 1. The coolant circulation tank 3 is used to store the cooling medium. The other end of the cooling channel is connected to the coolant circulation tank 3 through a return pipe 31. The coolant circulation tank 3 is connected to the inlet end of the pump 2 through a supply pipe. Both the inlet pipe and the return pipe 31 are set with telescopic hoses.

[0023] When pump 2 is running, it draws coolant from the coolant circulation tank 3 and sequentially sends it through the supply pipe, pump 2, distribution pipe 21, and inlet pipe into the cooling channels inside the upper and lower molds 11. After carrying away the heat from the molds inside the cooling channels, the coolant flows back to the coolant circulation tank 3 via the return pipe 31, forming a complete coolant circulation loop. Both the inlet pipe and the return pipe 31 are equipped with telescopic hoses, which can adapt to the positional changes caused by the lifting and lowering of the upper mold 12, preventing the pipes from being pulled and damaged.

[0024] The side of the coolant circulation tank 3 is bolted with heat dissipation fins 4. After the mold heats up, the high-temperature coolant that returns to the coolant circulation tank 3 enters the coolant circulation tank 3. The heat is transferred to the heat dissipation fins 4, and the heat is exchanged with the outside air through the heat dissipation fins 4 to achieve heat dissipation and cooling of the coolant, ensuring the circulation cooling effect. The bolt connection method makes it easy to disassemble the heat dissipation fins 4 for cleaning dust and debris, and maintenance is convenient.

[0025] The vacuum pumping assembly includes a vacuum pump 5 fixed to a fixed workbench 1. The inlet of the vacuum pump 5 is connected to a vacuum pipe 51. The end of the vacuum pipe 51 away from the vacuum pump 5 is connected to the exhaust port. A vacuum pressure sensor is installed on the vacuum pipe 51. During the slow mold closing process, the vacuum pump 5 starts and evacuates the inside of the concave cavity through the vacuum pipe 51. The vacuum pressure sensor monitors the vacuum level inside the pipe in real time and feeds the signal back to the electrical control cabinet, so that the operator can keep track of the cavity exhaust status, ensure that the air trapped between the layers is fully discharged, and reduce bubble defects.

[0026] The fixed workbench 1 is equipped with a demolding and ejection mechanism, which includes an ejection cylinder 6. The output end of the ejection cylinder 6 is connected upward to an ejection plate 61. Multiple sets of ejector rods 62 are provided on the ejection plate 61. The upper end of the ejector rods 62 extends into the concave cavity of the lower mold 11. After the upper mold 12 is lifted upward to complete the mold opening, the ejection cylinder 6 drives the ejection plate 61 to move upward, which drives the multiple sets of ejector rods 62 to extend upward synchronously out of the concave cavity surface, thus lifting the solidified drone body from inside the concave cavity. This avoids tearing damage to the shell and reinforcing ribs caused by manually prying the thin-walled body.

[0027] The above is the entire usage process of the wind-resistant drone fuselage composite material molding device.

[0028] The present invention and its embodiments have been described above. This description is not restrictive, and the accompanying drawings are only one embodiment of the present invention; the actual structure is not limited thereto. In conclusion, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the spirit of the invention, such designs should fall within the protection scope of the present invention.

[0029] Unless otherwise expressly specified and limited, the terms "set up," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

Claims

1. A wind-resistant unmanned aerial vehicle (UAV) fuselage composite material molding device, comprising a fixed worktable (1), a lower mold (11) mounted above the fixed worktable (1), and an upper mold (12) provided above the lower mold (11), characterized in that: The fixed workbench (1) is equipped with an installation base (13), and the installation base (13) is provided with a lifting mechanism. The output end of the lifting mechanism is connected to the upper mold (12). The upper mold (12) is driven by the lifting mechanism to separate from and close the lower mold (11). The upper mold (12) and lower mold (11) are both equipped with heating and cooling mechanisms. The lower mold (11) is provided with a concave cavity for forming wind-resistant reinforcing ribs. The cavity sidewall of the lower mold (11) is provided with an exhaust port, which is connected to an external vacuum pumping assembly. An electrical control cabinet is provided on one side of the fixed workbench (1). The electrical control cabinet is electrically connected to the lifting mechanism, heating mechanism, cooling and shaping mechanism, and vacuum pumping assembly.

2. The wind-resistant UAV fuselage composite material molding device according to claim 1, characterized in that: The lifting mechanism includes a hydraulic cylinder (14), the cylinder body of which is fixedly installed on the top of the mounting base (13), the lower end of the piston rod of the hydraulic cylinder (14) is fixedly connected to the top plate of the upper mold (12), and the mounting base (13) is provided with a guide column (15) fixedly connected to the upper mold (12).

3. The wind-resistant UAV fuselage composite material molding device according to claim 1, characterized in that: The heating mechanism includes multiple electric heating tubes and thermocouple temperature probes. The electric heating tubes are embedded inside the mold base of the upper mold (12) and the lower mold (11). The thermocouple temperature probes are arranged around the mold cavity of the lower mold (11) and the mounting base (13). The electric heating tubes and thermocouple temperature probes are electrically connected to the electrical control cabinet.

4. The wind-resistant UAV fuselage composite material molding device according to claim 1, characterized in that: The cooling and shaping mechanism includes cooling channels opened inside the upper mold (12) and lower mold (11) bases. A pump (2) is installed on the fixed workbench (1). The outlet end of the pump (2) is connected to a diversion pipe (21). The diversion pipe (21) is connected to the cooling channel through the inlet pipe.

5. The wind-resistant UAV fuselage composite material molding device according to claim 4, characterized in that: The fixed workbench (1) is equipped with a coolant circulation tank (3) on its side. The other end of the cooling channel is connected to the coolant circulation tank (3) through a return pipe (31). The coolant circulation tank (3) is connected to the inlet end of the pump (2) through a supply pipe. Both the inlet pipe and the return pipe (31) are set with telescopic hoses.

6. The wind-resistant UAV fuselage composite material molding device according to claim 5, characterized in that: The coolant circulation tank (3) has heat dissipation fins (4) installed on its side by bolts.

7. The wind-resistant UAV fuselage composite material molding device according to claim 1, characterized in that: The vacuum pumping assembly includes a vacuum pump (5) fixed on a fixed workbench (1). The inlet end of the vacuum pump (5) is connected to a vacuum pipeline (51). The end of the vacuum pipeline (51) away from the vacuum pump (5) is connected to the exhaust port. A vacuum pressure sensor is installed on the vacuum pipeline (51).

8. The wind-resistant UAV fuselage composite material molding device according to claim 1, characterized in that: The fixed workbench (1) is equipped with a demolding ejection mechanism, which includes an ejection cylinder (6). The output end of the ejection cylinder (6) is connected upward to the ejection plate (61). Multiple sets of ejector rods (62) are provided on the ejection plate (61), and the upper end extends into the concave cavity of the lower mold (11).

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