Preparation method of high-performance aluminum alloy profile for unmanned aerial vehicle body

Abstract

The application discloses a preparation method of high-performance aluminum alloy profiles for unmanned aerial vehicle fuselages and relates to the field of aluminum alloy profile preparation. The oxidation device for aluminum alloy profile processing comprises an oxidation tank, a driving motor is fixedly installed on the side wall of the oxidation tank, a driving rotating shaft is drivingly installed on the output shaft of the driving motor, a cross-shaped mounting plate is fixedly installed on the outer wall of the driving rotating shaft, and a connecting light pole is fixedly installed on the cross-shaped mounting plate. Through the innovative oxidation device design, the circulation and alternation of multiple containing frames can be realized. While one batch of aluminum alloy profiles is subjected to anodic oxidation, another batch of profiles which have been processed can be exposed and taken down, and new profiles to be processed can be installed at the same time, so that the downtime caused by loading and unloading and waiting between batches of materials is greatly reduced, the efficiency bottleneck problem under the single-batch processing mode of the traditional oxidation equipment is effectively solved, and continuous or semi-continuous production is realized.

Description

Technical Field

[0001] This invention relates to the field of aluminum alloy profile manufacturing, and specifically to a method for manufacturing high-performance aluminum alloy profiles for unmanned aerial vehicle (UAV) fuselages. Background Technology

[0002] Aluminum profiles are alloy materials with aluminum as the main component. They are produced by melting and extruding aluminum rods to obtain aluminum materials with different cross-sectional shapes. Different alloy proportions result in different mechanical properties and applications for the produced aluminum profiles. As drone technology upgrades towards "long endurance, large payload, and high precision," the requirements for fuselage materials are becoming increasingly stringent. Aluminum profiles offer balanced performance, meeting various needs. For example, their high strength meets the requirements for the fuselage structure to withstand flight stresses; their relatively low density reduces the overall weight of the drone, extending its flight range.

[0003] A Chinese patent publication (CN221094325U) discloses a user-friendly aluminum profile surface oxidation device, comprising a base and an oxidation pool located on top of the base, and further including: a protective mechanism to prevent oxidation water splashing; and a placement mechanism for placing the aluminum profile. The base has an internal cavity, inside which a mounting frame and an electrically operated telescopic rod are installed. A movable block is fitted onto the outer circumference of the mounting frame, and an adjusting block is connected to the top outer wall of the mounting frame. The bottom outer wall of the adjusting block has an adjusting hole, and a rotating rod is inserted into the top outer wall of the adjusting block. The rotating rod has a first thread and a second thread on its outer walls near the bottom and top, respectively. A fixing block is connected to the top of the rotating rod, and the top outer wall of the fixing block has an adapter groove. This user-friendly aluminum profile surface oxidation device provides the technical effect of reducing oxidation water waste.

[0004] The oxidation equipment mentioned above also has the following problems when in use: the oxidation equipment can only process one batch of materials at a time, and the installation and connection of the batch of materials with the oxidation equipment also requires a certain amount of time. After the oxidation process is completed, it also takes a certain amount of time to remove the materials. This results in a long time consumption for the oxidation process of multiple batches of materials, leading to low final processing efficiency.

[0005] Therefore, it is necessary to invent a high-performance aluminum alloy profile for drone fuselages and its preparation method to solve the above problems. Summary of the Invention

[0006] The purpose of this invention is to provide a method for preparing high-performance aluminum alloy profiles for drone fuselages, in order to solve the problem mentioned in the background art that the oxidation equipment can only perform oxidation processing on one batch of materials, and the installation, connection and placement of the batch of materials with the oxidation equipment also requires a certain amount of time. After the oxidation processing is completed, it also takes a certain amount of time to remove the materials. This results in a long time consumption for the oxidation processing of multiple batches of materials, leading to low final processing efficiency.

[0007] To achieve the above objectives, the present invention provides the following technical solution: a method for preparing high-performance aluminum alloy profiles for drone fuselages, comprising an oxidation apparatus for processing aluminum alloy profiles, and the method for preparing high-performance aluminum alloy profiles for drone fuselages is as follows: Step 1: Customized alloy composition adjustment, adding 0.05% rare earth element La and 0.02% Sc element to the traditional 6061-T6 series aluminum alloy; Step 2: Vacuum melting and homogenization treatment. The prepared raw materials are placed in a vacuum melting furnace and melted at a temperature of 720℃-750℃. Argon gas is introduced during the process to protect the alloy from oxidation. After melting, the molten alloy is poured into a mold to cast aluminum rods. The aluminum rods are then homogenized by holding them at a temperature of 550℃-570℃ for 8-12 hours, and then cooled to room temperature with the furnace. Step 3: Heat the homogenized aluminum casting to 450℃-480℃, and at the same time preheat the extrusion die to 400℃-420℃. Use a warm extrusion process to extrude the aluminum casting into aluminum profiles with the required cross-sectional shape through an extruder. Control the extrusion speed at 10-15m / min to ensure the profile forming quality and dimensional accuracy. Step 4: Immediately after extrusion, the aluminum profiles undergo graded quenching. First, they are cooled in water at 60℃-80℃ for 10-15 seconds, then quickly transferred to a hot air furnace at 120℃-140℃ and held for 2-3 hours. Finally, they are air-cooled to room temperature. After quenching, the aluminum profiles undergo artificial aging treatment, held at 170℃-180℃ for 6-8 hours to further improve the strength and hardness of the profiles. Step 5: Aluminum alloy profiles undergo anodizing treatment using an anodizing device. First, surface pretreatment is performed: the aged aluminum profiles are placed in an alkaline cleaning solution to remove surface oil and oxide layers, then rinsed with clean water, and then placed in an acidic solution for neutralization. Finally, they are rinsed with clean water and dried before anodizing: the pretreated aluminum profiles are used as anodes and placed in a sulfuric acid electrolyte solution with a sulfuric acid concentration of 180-200 g / L, a temperature of 18℃-22℃, and a current of 12-15 A / dm² for 25-30 minutes to form an oxide film with a thickness of 15-20 μm on the profile surface. Then, sealing treatment is performed: the anodized aluminum profiles are placed in a sealing solution (nickel salt sealing solution, pH 5.5-6.0, temperature 60℃-65℃) and kept at that temperature for 15-20 minutes. Step 5: Performance testing. The anodized aluminum profiles are straightened, cut, and polished to ensure dimensional accuracy and surface quality. Then, the profiles are tested for tensile strength, yield strength, elongation, hardness, and corrosion resistance to ensure that the profile performance meets the design requirements.

[0008] An oxidation device for aluminum alloy profile processing includes an oxidation tank. A drive motor is fixedly installed on the side wall of the oxidation tank, and a drive rotating shaft is driven by the output shaft of the drive motor. A cross mounting plate is fixedly fitted on the outer wall of the drive rotating shaft. A connecting rod is fixedly installed on the cross mounting plate, and a mounting ring is movably fitted on the outer ring of the connecting rod through a movable component. A holding frame is connected and installed on the mounting ring through a connecting steel cable.

[0009] Preferably, there are two cross mounting plates, which are arranged in parallel and fixedly mounted on the outer wall of the drive rotating shaft. The four sets of extended ends on the two cross mounting plates are respectively connected to the two ends of four connecting light rods, so as to ensure that the synchronous rotation of the two cross mounting plates causes the four sets of connecting light rods to rotate in a ring.

[0010] Preferably, two of the aforementioned mounting rings are arranged as a set, and a total of four sets are provided. The four sets of mounting rings are respectively movably mounted on the outer ring of the four connecting light rods through movable components. The two mounting rings in each set are symmetrically arranged with reference to the central axis of the connecting light rod as the axis of symmetry, so that the holding frame always remains vertically downward under the action of gravity.

[0011] Preferably, the holding frame is composed of a base plate and a frame welded to both sides of the base plate, and the upper end of the frame is connected to the fitting ring.

[0012] Preferably, the movable component includes an annular block that is fixedly fitted onto the outer ring of the connecting light rod, and the annular block and the annular groove provided inside the fitting ring are rotated in a close fit. In this way, when the four sets of connecting light rods rotate in a ring, the holding frame always remains vertically downward under the action of gravity.

[0013] The technical effects and advantages provided by the present invention in the above technical solution are as follows: 1. This invention, through its innovative oxidation device design, enables the cyclical alternation of multiple holding frames. While one batch of aluminum alloy profiles is being anodized, another batch of profiles that has already been processed can be exposed and removed, and new profiles to be processed can be installed simultaneously. This significantly reduces downtime caused by loading, unloading, and waiting between batches of materials, effectively solving the efficiency bottleneck problem of traditional oxidation equipment in single-batch processing mode, and realizing continuous or semi-continuous production. 2. The combination of the drive structure and moving components in the oxidation device ensures that the frame holding the profile remains vertically stable during the electrochemical reaction when the profile is immersed in the oxidation solution. This ensures uniform contact between the profile surface and the electrolyte and the stability of the current distribution, which is conducive to the formation of a uniform and dense oxide film, thereby improving the corrosion resistance and surface quality of the final product. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this invention. For those skilled in the art, other drawings can be obtained based on these drawings.

[0015] Figure 1 This is a three-dimensional view of the overall structure of the oxidation device of the present invention; Figure 2 This is a three-dimensional view of the internal structure of the oxidation tank of the present invention (partially cut out). Figure 3 This is a perspective view of the connection structure between the cross-shaped mounting plate and the holding frame of the present invention; Figure 4 This is a perspective view of the connection structure between the holding frame and the connecting rod of the present invention; Figure 5 This is an exploded view of the connection structure between the collar (partially cut out) and the connecting rod of the present invention.

[0016] Explanation of reference numerals in the attached figures: 1. Oxidation tank; 2. Drive motor; 3. Drive rotating shaft; 4. Cross mounting plate; 5. Connecting rod; 6. Fitting ring; 7. Connecting steel cable; 8. Container frame; 801. Base plate; 802. Frame; 9. Movable component; 901. Annular block; 902. Annular groove. Detailed Implementation

[0017] To enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0018] This invention provides, for example Figure 1-5 The method for preparing a high-performance aluminum alloy profile for a drone fuselage is shown, including an oxidation device for processing aluminum alloy profiles. The method for preparing the high-performance aluminum alloy profile for a drone fuselage is as follows: Step 1: Customized alloy composition adjustment, adding 0.05% rare earth element La and 0.02% Sc element to the traditional 6061-T6 series aluminum alloy; Step 2: Vacuum melting and homogenization treatment. The prepared raw materials are placed in a vacuum melting furnace and melted at a temperature of 720℃-750℃. Argon gas is introduced during the process to protect the alloy from oxidation. After melting, the molten alloy is poured into a mold to cast aluminum rods. The aluminum rods are then homogenized by holding them at a temperature of 550℃-570℃ for 8-12 hours, and then cooled to room temperature with the furnace. Step 3: Heat the homogenized aluminum casting to 450℃-480℃, and at the same time preheat the extrusion die to 400℃-420℃. Use a warm extrusion process to extrude the aluminum casting into aluminum profiles with the required cross-sectional shape through an extruder. Control the extrusion speed at 10-15m / min to ensure the profile forming quality and dimensional accuracy. Step 4: Immediately after extrusion, the aluminum profiles undergo graded quenching. First, they are cooled in water at 60℃-80℃ for 10-15 seconds, then quickly transferred to a hot air furnace at 120℃-140℃ and held for 2-3 hours. Finally, they are air-cooled to room temperature. After quenching, the aluminum profiles undergo artificial aging treatment, held at 170℃-180℃ for 6-8 hours to further improve the strength and hardness of the profiles. Step 5: Aluminum alloy profiles undergo anodizing treatment using an anodizing device. First, surface pretreatment is performed: the aged aluminum profiles are placed in an alkaline cleaning solution to remove surface oil and oxide layers, then rinsed with clean water, and then placed in an acidic solution for neutralization. Finally, they are rinsed with clean water and dried before anodizing: the pretreated aluminum profiles are used as anodes and placed in a sulfuric acid electrolyte solution with a sulfuric acid concentration of 180-200 g / L, a temperature of 18℃-22℃, and a current of 12-15 A / dm² for 25-30 minutes to form an oxide film with a thickness of 15-20 μm on the profile surface. Then, sealing treatment is performed: the anodized aluminum profiles are placed in a sealing solution (nickel salt sealing solution, pH 5.5-6.0, temperature 60℃-65℃) and kept at that temperature for 15-20 minutes. Step 5: Performance testing. The anodized aluminum profiles are straightened, cut, and polished to ensure dimensional accuracy and surface quality. Then, the profiles are tested for tensile strength, yield strength, elongation, hardness, and corrosion resistance to ensure that the profile performance meets the design requirements.

[0019] The oxidation device for aluminum alloy profile processing includes an oxidation tank 1. A drive motor 2 is fixedly installed on the side wall of the oxidation tank 1, and a drive rotating shaft 3 is driven by the output shaft of the drive motor 2. A cross mounting plate 4 is fixedly fitted on the outer wall of the drive rotating shaft 3. There are two cross mounting plates 4, which are parallel and fixedly fitted on the outer wall of the drive rotating shaft 3. The four sets of extended ends on the two cross mounting plates 4 are respectively connected to the two ends of four connecting rods 5, ensuring that the synchronous rotation of the two cross mounting plates 4 causes the four sets of connecting rods 5 to rotate in a ring. The outer ring of the connecting rods 5 is movably fitted with a fitting ring 6 through a movable component 9. Two fitting rings 6 are set as a group, and four groups are set. The four groups of fitting rings 6 are movably fitted on the outer ring of the four connecting rods 5 through the movable component 9. The two fitting rings 6 in each group are symmetrically arranged with reference to the central axis of the connecting rods 5 as the axis of symmetry. In this way, the holding frame 8 always remains vertically downward under the action of gravity.

[0020] A holding frame 8 is connected to the mounting ring 6 via a connecting steel cable 7. The holding frame 8 is composed of a base plate 801 and a frame 802 welded to both sides of the base plate 801, and the upper end of the frame 802 is connected to the mounting ring 6.

[0021] The active component 9 includes an annular block 901 that is fixedly fitted on the outer ring of the connecting light rod 5. The annular block 901 and the annular groove 902 provided inside the fitting ring 6 are connected in a close-fitting rotational manner. In this way, when the four sets of connecting light rods 5 rotate in a ring, the holding frame 8 always remains vertically downward under the action of gravity.

[0022] In use, after a batch of profiles undergoes oxidation treatment (i.e., immersion, electrostatic reaction, and removal) in four sets of holding frames 8, the drive motor 2 starts, driving the drive shaft 3 to rotate. This, in turn, drives the two cross mounting plates 4 and the four connecting rods 5 to rotate at a uniform speed. Since the holding frames 8 are suspended by connecting steel cables 7 and their center of gravity is always downward under gravity, and the mounting ring 6 can rotate around the outer ring of the connecting rods 5 via the movable component 9, the holding frames 8 themselves will not be thrown or overturned while the connecting rods 5 are revolving in a circular trajectory. Instead of simply rotating, the rotating mechanism maintains a stable, vertically downward orientation while the set ring 6 rotates. This cyclical rotation mechanism allows for easy removal of a processed profile from the holding frame 8 that has been processed and moved out of the oxidation tank 1. Simultaneously, the rotating mechanism rotates another set of holding frames 8 and sends them into the designated immersion position in the oxidation tank 1, immediately starting the next round of oxidation treatment without waiting for the previous batch of profiles to be completely unloaded and cleaned. This multi-station collaborative operation achieves time overlap between loading / unloading and core processing steps, significantly shortening the overall production cycle.

[0023] The foregoing has only described certain exemplary embodiments of the present invention by way of illustration. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the foregoing drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A method for preparing high-performance aluminum alloy profiles for unmanned aerial vehicle (UAV) fuselages, comprising an oxidation apparatus for processing aluminum alloy profiles, characterized in that, The manufacturing method of high-performance aluminum alloy profiles for UAV fuselages is as follows: Step 1: Customized alloy composition adjustment, adding 0.05% rare earth element La and 0.02% Sc element to the traditional 6061-T6 series aluminum alloy; Step 2: Vacuum melting and homogenization treatment. The prepared raw materials are placed in a vacuum melting furnace and melted at a temperature of 720℃-750℃. Argon gas is introduced during the process to protect the alloy from oxidation. After melting, the molten alloy is poured into a mold to cast aluminum rods. The aluminum rods are then homogenized by holding them at a temperature of 550℃-570℃ for 8-12 hours, and then cooled to room temperature with the furnace. Step 3: Heat the homogenized aluminum casting to 450℃-480℃, and at the same time preheat the extrusion die to 400℃-420℃. Use a warm extrusion process to extrude the aluminum casting into aluminum profiles with the required cross-sectional shape through an extruder. The extrusion speed is controlled at 10-15m / min to ensure the profile forming quality and dimensional accuracy. Step 4: Immediately after extrusion, the aluminum profiles undergo graded quenching. First, they are cooled in water at 60℃-80℃ for 10-15 seconds, then quickly transferred to a hot air furnace at 120℃-140℃ and held for 2-3 hours. Finally, they are air-cooled to room temperature. After quenching, the aluminum profiles undergo artificial aging treatment, held at 170℃-180℃ for 6-8 hours to further improve the strength and hardness of the profiles. Step 5: Aluminum alloy profiles undergo oxidation treatment using an oxidation device. First, surface pretreatment is performed: the aged aluminum profiles are placed in an alkaline cleaning solution to remove surface oil and oxide layers, then rinsed with clean water, and then placed in an acidic solution for neutralization. Finally, they are rinsed with clean water and dried before anodizing: the pretreated aluminum profiles are used as anodes and placed in a sulfuric acid electrolyte solution with a sulfuric acid concentration of 180-200 g / L, a temperature of 18℃-22℃, and a current of 12-15 A / dm² for 25-30 minutes to form an oxide film with a thickness of 15-20 μm on the profile surface. Then, sealing treatment is performed: the anodized aluminum profiles are placed in a sealing solution (nickel salt sealing solution, pH 5.5-6.0, temperature 60℃-65℃) and kept at that temperature for 15-20 minutes. Step 5: Performance testing. The anodized aluminum profiles are straightened, cut, and polished to ensure dimensional accuracy and surface quality. Then, the profiles are tested for tensile strength, yield strength, elongation, hardness, and corrosion resistance to ensure that the profile performance meets the design requirements.

2. An oxidation apparatus for the preparation method of the high-performance aluminum alloy profile for the fuselage of an unmanned aerial vehicle as described in claim 1, characterized in that, An oxidation device for aluminum alloy profile processing includes an oxidation tank (1), a drive motor (2) is fixedly installed on the side wall of the oxidation tank (1), and a drive rotating shaft (3) is driven and installed on the output shaft of the drive motor (2). A cross mounting plate (4) is fixedly fitted on the outer wall of the drive rotating shaft (3). A connecting rod (5) is fixedly installed on the cross mounting plate (4), and a mounting ring (6) is movably fitted on the outer ring of the connecting rod (5) through a movable component (9). A holding frame (8) is connected and installed on the mounting ring (6) through a connecting steel cable (7).

3. The oxidation device for high-performance aluminum alloy profiles for UAV fuselages according to claim 2, characterized in that, The cross mounting plate (4) is provided in two pieces, and the two cross mounting plates (4) are distributed in parallel and fixedly mounted on the outer wall of the drive rotating shaft (3). The four sets of extended ends on the two cross mounting plates (4) are respectively connected to the two ends of the four connecting light rods (5).

4. An oxidation device for high-performance aluminum alloy profiles for UAV fuselages according to claim 3, characterized in that, The two sets of the fitting rings (6) are set together, and there are four sets in total. The four sets of fitting rings (6) are respectively fitted onto the outer ring of the four connecting light rods (5) through the movable component (9). The two sets of fitting rings (6) in one set are symmetrically arranged with reference to the central axis of the connecting light rod (5) as the axis of symmetry.

5. The oxidation device for high-performance aluminum alloy profiles for UAV fuselages according to claim 2, characterized in that, The holding frame (8) is composed of a base plate (801) and a frame (802) welded to both sides of the base plate (801), and the upper end of the frame (802) is connected to the fitting ring (6).

6. The oxidation device for high-performance aluminum alloy profiles for UAV fuselages according to claim 5, characterized in that, The active component (9) includes an annular block (901) fixedly fitted on the outer ring of the connecting rod (5), and the annular block (901) and the annular groove (902) provided inside the fitting ring (6) are connected in a close-fitting rotational manner.

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