Bamboo composite supporting frame structure for medium-load unmanned aerial vehicle and manufacturing method

Abstract

The invention discloses a bamboo composite supporting frame structure for a medium-load unmanned aerial vehicle and a manufacturing method, and relates to the technical field of unmanned aerial vehicle supporting frames. A supporting frame component is overall in a trapezoidal layout, and a body is directionally integrated by bamboo units with the section thickness smaller than or equal to 3 mm and phenolic resin curing layers between the adjacent bamboo units; the bamboo units are rectangular-section bamboo chips obtained by processing raw bamboos, the trapezoidal short sides of the components are connected with a base of an unmanned aerial vehicle body, the trapezoidal long sides with arc-shaped lead angles are in contact with a landing surface, and 2-3 connecting rods in the middle are in gluing and mechanical double or multiple composite connection with inclined rods on the two sides. The manufacturing process comprises the steps of bamboo unit machining, bamboo unit gluing, assembling and forming, surface polishing treatment, later machining and the like, large-scale production is easy to conduct, and the bamboo composite supporting frame product shows the high toughness, the cost advantage and the biodegradability and has good application prospects.

Description

Technical Field

[0001] The present invention relates to the technical field of unmanned aerial vehicle (UAV) support frames, and in particular to a bamboo composite support frame structure for a medium-load UAV and a manufacturing method thereof. Background Art

[0002] Medium-load UAVs play an important role in industrial inspections, medium-sized logistics and transportation, special operations (such as firefighting and search and rescue), and other fields. These UAVs are large in size, high in value, and operate in a changing environment. The static and dynamic loads (landing impact, wind load sway) borne by their support frames are larger and more complex, requiring the support frame material to have high specific strength, impact fatigue resistance, connection reliability, and environmental adaptability. Currently, medium-load UAV support frames are almost monopolized by high-end aluminum alloys, titanium alloys, and carbon fiber composites. Although aluminum alloys have high strength and good processability, their low specific stiffness leads to a significant weight disadvantage under the same stiffness design. Titanium alloys have excellent performance but are expensive. The low toughness of the two leads to stress concentration sensitivity and insufficient fatigue resistance, which become hidden dangers in long-term use. The brittle fracture of carbon fiber composites poses a safety hazard, and the high maintenance cost caused by one-piece molding also limits its widespread application.

[0003] Existing support frame materials have many limitations due to the characteristics of medium-load UAVs. However, bamboo, as a natural, high-performance fiber-reinforced composite material, has longitudinal tensile strength and modulus close to those of ordinary glass fiber composites, while its specific strength and toughness are significantly superior to most alloy materials. It also has excellent vibration damping properties, offering a potential solution to the challenges of medium-load UAV support frames. Therefore, there is an urgent need to develop a bamboo composite structural system and manufacturing process optimized for medium-load conditions. This system can fully utilize bamboo's natural material advantages, compensate for its lack of uniformity and stability, and achieve a comprehensive performance leap in rigidity, cushioning, weather resistance, and cost, providing a new green solution for medium-load UAV support frames. Summary of the Invention

[0004] The purpose of the present invention is to provide a bamboo composite support frame structure and manufacturing method for medium-load UAVs, so as to solve the problems existing in the prior art, give full play to the performance characteristics, price advantages and environmental friendliness of bamboo compared with existing UAV support frame materials (such as aluminum alloy, titanium-magnesium alloy, carbon fiber, etc.), improve the overall performance of medium-load UAV systems, and reduce production and maintenance costs.

[0005] To achieve the above objectives, the present invention provides a bamboo composite support frame structure and manufacturing method for a medium-load UAV. The specific technical solutions are as follows:

[0006] A bamboo composite support frame structure for a medium-load unmanned aerial vehicle (UAV). The bamboo composite support frame components are arranged in a trapezoidal shape. The component body is directionally integrated from bamboo units with a cross-sectional thickness of 3mm or less and a phenolic resin cured layer between adjacent bamboo units. The short sides of the bamboo composite support frame components are connected to the fuselage base of the UAV, and the long sides of the trapezoid with arc-shaped chamfers contact the landing surface. Two to three connecting rods are arranged in the middle and are compositely connected to the inclined rods on both sides. The curved parts of the bamboo composite support frame components are all arc-shaped transitions, and the arc curvature of the components and the cross-sectional area of ​​the body are adjusted according to the stress conditions.

[0007] In a preferred solution of a bamboo composite support frame structure for a medium-load UAV, the bamboo units are defect-free standard bamboo strips, preferably rectangular cross-section bamboo strips processed from the green side of the bamboo.

[0008] In a preferred structural solution of a bamboo composite support frame for a medium-load UAV, the cross-sectional shape and size specifications of the middle connecting rod should be designed according to the inclination angles of the inclined rods on both sides, the maximum load of the UAV, and the landing ground conditions.

[0009] In a preferred embodiment of a bamboo composite support frame structure for a medium-load UAV, the composite connection refers to the use of gluing and mechanical double or multiple connections, including gluing plus shallow groove bundling, or gluing plus alloy clip positioning bolt connection, or gluing plus alloy ring bite connection, etc.

[0010] A method for manufacturing a bamboo composite support frame member for a medium-load UAV, comprising the following specific steps:

[0011] S1. Select 5- to 6-year-old defect-free bamboo materials, add 32-50 mm to the design size of the composite support frame components, cut them into fixed lengths, and then split them circumferentially to obtain curved bamboo strips with a width of 12 mm ≤ ≤ 22 mm. Plane the bamboo strips obtained by splitting them in the thickness direction at a position about 1 / 2 of the green side of the bamboo to obtain rectangular cross-section bamboo strips, and then perform conventional anti-corrosion, anti-mildew, and anti-insect treatments on them. Finally, dry them at a temperature of ≤100°C to a moisture content of less than 16%, and then finely process them to obtain standard bamboo strips with a thickness of ≤3 mm, which are stored in a balance room for future use.

[0012] S2. Purchase phenolic resin glue from glue-making enterprises, use aqueous solvent to dilute to a concentration range of 22% to 25% to obtain impregnation glue solution, and impregnate the standard bamboo strips obtained in step S1 through the device in "A High-efficiency Impregnation Device for Bamboo Units" submitted simultaneously with the present application. The surface layer of the outlet roller group in "A High-efficiency Impregnation Device for Bamboo Units" uses rubber material to control the amount of glue applied to the surface of the standard bamboo strips. The center roller group in "A High-efficiency Impregnation Device for Bamboo Units" controls the extrusion strength of the bamboo filaments to cause the standard bamboo strips to undergo 12% to 16% lateral deformation. The standard bamboo strips after glue extrusion are then dried to a moisture content of ≤16% for standby use.

[0013] S3. Select a movable mold body and a static mold body made of hot-working die steel that match the shape of the medium-loaded bamboo composite support frame component, and perform two consecutive movable mold operations of low-pressure initial forming and high-pressure final forming. The movement direction of the movable mold body is perpendicular to the axial direction of the component body. The movable mold body is divided into blocks according to the shape of the bamboo composite support frame component, with a straight type as one block, a curved type as multiple blocks, a curved angle ≤ 40° as one block, a curved angle 40° < ≤ 80° as two blocks, and a curved angle 80° < ≤ 120° as one block. 3 pieces, 120°<bending angle≤160° is 4 pieces, 160°<bending angle≤200° is 5 pieces, 200°<bending angle≤240° is 6 pieces, there is a rectangular meshing space of 15~45mm between adjacent movable molds, within the above bending angle range, the larger the bending angle, the larger the meshing space, each closed space corresponds to the static mold body is 1 piece, when the movable mold body and the static mold body are in a closed working state, the cross-sectional area of ​​the bamboo component entity that can be formed is ≥700mm 2 、Ring cross-sectional area ≥490mm 2 A circular cross-section heat exchange channel is provided inside the movable mold body and the static mold body. The diameter of the channel is 10 to 22 mm. For other structures of the mold, please refer to the "A bamboo support frame manufacturing equipment and operation method for drones" submitted at the same time as this application.

[0014] S4, the bamboo strips obtained in step S2 are oriented and laid into the mold obtained in step S3, and the laying amount is 0.9-1.0 g / cm2 of the closed volume of the mold (that is, the final molding volume of the bamboo component). 3 The weight calculated by density is hydraulically pressurized, and the pressurization direction is perpendicular to the axial direction of the bamboo component, with a vertical deviation of ≤±2.5°. The first pressurization is high-speed and low-pressure pressurization, which compresses the bamboo component to 1.15-1.25 times the final molding volume. The second pressurization is low-speed and high-pressure pressurization, which compresses the bamboo component to the final molding volume, that is, the mold is completely closed. At the beginning of the pressurization process, the temperature in the static mold is 150℃~170℃, and the temperature in the dynamic mold is 10℃~15℃ higher than the static mold temperature. The type of heating medium and the flow rate are determined by the company's own conditions combined with the actual temperature of the contact surface between the mold and the standard bamboo strips. Superheated steam and heat transfer oil are preferred. After the mold is fully closed for 12-17 minutes, the mold is automatically demoulded to obtain the bamboo component rough material, which is placed in a balancing room for curing with a curing time of ≥4.5h.

[0015] S5. Place the bamboo component raw material obtained in step S4 into a rotary polishing device for surface polishing. The polishing medium in the rotary polishing tank is bamboo particles with a length or width of 5 mm to 25 mm, a thickness of 3 mm to 10 mm, and an air-dry density of ≥0.7 g / cm 3, moisture content ≤ 7%, filling volume is 60% ~ 72%, polishing tank diameter ≥ 4 times the height or width of the bamboo component, polishing tank length ≥ 3 times the length of the bamboo component, polishing tank speed ≥ 240r / min.

[0016] S6. The bamboo composite support frame components obtained in step S5 are subjected to post-processing, including quality inspection, connection hole and groove processing, composite connection, coating of a protective layer, sampling performance test, etc.

[0017] Preferably, in step S1, the processing method for cutting the bamboo tube into fixed length is sawing, the processing method for longitudinally splitting to obtain bamboo strips with a certain width is selected by an automatic bamboo splitting machine, and the processing method for removing the curved edges is planing and milling.

[0018] Preferably, the antiseptic, antifungal and anti-insect treatment in step S1 is carried out by immersion in an immersion solution, the active ingredient content of which is 0.5% of copper azole antiseptic, 1.2% of boric acid antifungal and 0.3% of permethrin insecticide.

[0019] Preferably, the connection hole and groove processing in step S6 is performed using a CNC machining center to ensure shape and position tolerance requirements.

[0020] Compared with the prior art, other solutions of the present invention have achieved the following technical effects:

[0021] The present invention provides a bamboo composite support frame structure and manufacturing method for medium-load UAVs. Through structural design and process manufacturing, its comprehensive performance of specific strength and specific stiffness is close to that of high-end carbon fiber composite materials, far exceeding the same load-bearing metal components; the unique fiber directional arrangement and material microstructure give it excellent impact toughness and impact fatigue resistance, and can play a good buffering effect under frequent take-offs and landings and complex impacts, maintaining structural integrity; the optimized bamboo unit has excellent resistance to environmental aging and is suitable for complex outdoor environments such as industrial inspections, logistics distribution, and special operations; the components are highly modularized, and local damage can be repaired by replacing a single connector at low cost, greatly improving maintainability and economy. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 The invention discloses a bamboo composite support frame structure for a medium-load UAV. DETAILED DESCRIPTION

[0023] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0024] The present invention provides a bamboo composite support frame structure and manufacturing method for medium-load UAVs. By selecting natural bamboo, rationally designing the structure and combining modern processing technology, a medium-load UAV composite support frame with excellent strength, durability, cushioning and environmental protection characteristics is prepared.

[0025] See also Figure 1 A bamboo composite support frame structure for a medium-load unmanned aerial vehicle (UAV) is shown. The structure is trapezoidal in shape. The component body is directionally integrated from bamboo units with a cross-sectional thickness of ≤3mm and a phenolic resin cured layer between adjacent units. The bamboo units are defect-free, standard bamboo strips, preferably rectangular strips made from the fleshy, green side of the bamboo. The short sides of the bamboo composite support frame are connected to the UAV's fuselage base, while the long sides of the trapezoid with curved chamfers contact the landing surface. Two to three connecting rods are located in the middle, connecting to the inclined rods on both sides. The cross-sectional shape and dimensions of the central connecting rods are designed based on the tilt angles of the inclined rods, the maximum payload of the UAV, and the landing surface conditions. The composite connection refers to the use of dual or multiple connections using gluing and mechanical methods, including gluing and shallow groove binding, gluing and alloy clip positioning bolts, or gluing and alloy ring snap connections. The curved portions of the bamboo composite support frame component are all curved transitions, and the curvature of the component arc and the cross-sectional area of ​​the body are adjusted according to the load conditions.

[0026] Next, a method for manufacturing a bamboo composite support frame component for a medium-load UAV is described in detail:

[0027] S1. Select 5- to 6-year-old defect-free bamboo materials, add 32 to 50 mm according to the design size of the composite support frame components, and then use a circular saw to cut them to a fixed length. Then use an automatic bamboo splitting machine to split them circumferentially to obtain curved bamboo strips with a width of 12 mm ≤ ≤ 22 mm. The bamboo strips obtained by splitting them in the thickness direction at a position about 1 / 2 close to the green side of the bamboo are planed and milled to obtain rectangular cross-section bamboo strips, and then they are impregnated with an impregnation liquid with an effective ingredient content of 0.5% copper azole preservative, 1.2% boric acid mildew inhibitor, and 0.3% chlorpyrifos insecticide to achieve the purpose of anti-corrosion, anti-mildew and anti-insect. Then, the bamboo strips are dried at a temperature of ≤100°C to a moisture content of less than 16%, and finely processed to obtain standard bamboo strips with a thickness of ≤3 mm, which are stored in a balance room for standby use.

[0028] S2. Purchase phenolic resin glue from glue-making enterprises, use aqueous solvent to dilute to a concentration range of 22% to 25% to obtain impregnation glue solution, and impregnate the standard bamboo strips obtained in step S1 through the device in "A High-efficiency Impregnation Device for Bamboo Units" submitted simultaneously with the present application. The surface layer of the outlet roller group in "A High-efficiency Impregnation Device for Bamboo Units" uses rubber material to control the amount of glue applied to the surface of the standard bamboo strips. The center roller group in "A High-efficiency Impregnation Device for Bamboo Units" controls the extrusion strength of the bamboo filaments to cause the standard bamboo strips to undergo 12% to 16% lateral deformation. The standard bamboo strips after glue extrusion are then dried to a moisture content of ≤16% for standby use.

[0029] S3. Select H13 hot-working die steel movable die and static die with a hardness of HRC 48-52 that match the shape of the medium-loaded bamboo composite support frame component, and perform two continuous movable die operations of low-pressure primary forming and high-pressure final forming. The movable die is installed on the four sides, and the static die is installed in the middle. The contact section of the movable die and the static die acting on the bamboo material can be a rectangular surface or an arc surface. The movement direction of the movable die is perpendicular to the axial direction of the component body. The movable die is divided into blocks according to the shape of the bamboo composite support frame component, with a straight type as one block and a curved type as multiple blocks. A bending angle of ≤40° is 1 block, a bending angle of 40°<≤80° is 2 blocks, and a bending angle of 80°<≤80° is ... The bending angle is ≤120° for 3 pieces, 120°<bending angle ≤160° for 4 pieces, 160°<bending angle ≤200° for 5 pieces, 200°<bending angle ≤240° for 6 pieces, and there is a rectangular meshing space of 15 to 45 mm between adjacent movable molds. Within the above bending angle range, the larger the bending angle, the larger the meshing space. Each closed space corresponds to one static mold body. When the movable mold body and the static mold body are in a closed working state, the cross-sectional area of ​​the bamboo component entity that can be formed is ≥700 mm 2 、Ring cross-sectional area ≥490mm 2 A circular cross-section heat exchange channel is provided inside the movable mold body and the static mold body. The diameter of the channel is 10 to 22 mm. For other structures of the mold, please refer to the "A bamboo support frame manufacturing equipment and operation method for drones" submitted at the same time as this application.

[0030] S4, the bamboo strips obtained in step S2 are oriented and laid into the mold obtained in step S3, and the laying amount is 0.9-1.0 g / cm2 of the closed volume of the mold (that is, the final molding volume of the bamboo component). 3The weight calculated by density is hydraulically pressurized, and the pressurization direction is perpendicular to the axial direction of the bamboo component, with a vertical deviation of ≤±2.5°. The first pressurization is high-speed and low-pressure pressurization, which compresses the bamboo component to 1.15-1.25 times the final molding volume. The second pressurization is low-speed and high-pressure pressurization, which compresses the bamboo component to the final molding volume, that is, the mold is completely closed. At the beginning of the pressurization process, the temperature in the static mold is 150℃~170℃, and the temperature in the dynamic mold is 10℃~15℃ higher than the static mold temperature. The type of heating medium and the flow rate are determined by the company's own conditions combined with the actual temperature of the contact surface between the mold and the standard bamboo strips. Superheated steam and heat transfer oil are preferred. After the mold is fully closed for 12-17 minutes, the mold is automatically demoulded to obtain the bamboo component rough material, which is placed in a balancing room for curing with a curing time of ≥4.5h.

[0031] S5. Place the bamboo component raw material obtained in step S4 into a rotary polishing device for surface polishing. The polishing medium in the rotary polishing tank is bamboo particles with a length or width of 5 mm to 25 mm, a thickness of 3 mm to 10 mm, and an air-dry density of ≥0.7 g / cm 3 , moisture content ≤ 7%, filling volume is 60% ~ 72%, polishing tank diameter ≥ 4 times the height or width of the bamboo component, polishing tank length ≥ 3 times the length of the bamboo component, polishing tank speed ≥ 240r / min.

[0032] S6. The bamboo composite support frame components obtained in step S5 are subjected to post-processing, including quality inspection, connection hole and groove processing, composite connection, coating of a protective layer, sampling performance test, etc. The connection hole and groove processing is performed using a CNC machining center to ensure the geometric tolerance requirements.

[0033] The bamboo composite support frame for medium-load UAVs prepared through the above steps fully utilizes the natural advantages of bamboo. Combined with modern structural design and manufacturing technology, the manufactured bamboo support frame has excellent mechanical properties, buffering energy absorption and environmental protection characteristics, and meets the take-off and landing requirements of medium-load UAVs.

[0034] Adaptive changes based on actual needs are all within the scope of protection of the present invention.

[0035] It should be noted that it will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the present invention is defined by the appended claims, not the foregoing description, and it is intended that all variations within the meaning and range of equivalents of the claims be encompassed within the present invention. Any reference signs in the claims should not be construed as limiting the claim to which they relate.

[0036] The present invention uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only intended to help understand the method and core concept of the present invention. At the same time, those skilled in the art will find that the specific implementation methods and application scopes may vary based on the concept of the present invention. In summary, the contents of this specification should not be construed as limiting the present invention.

Claims

1. A bamboo composite support frame structure for a medium-load UAV, characterized in that: The bamboo composite support frame components are arranged in a trapezoidal shape as a whole. The component body is directionally integrated by bamboo units with a cross-sectional thickness of ≤3mm and a phenolic resin cured layer between adjacent bamboo units. The short side of the trapezoid of the bamboo composite support frame component is connected to the fuselage base of the drone, and the long side of the trapezoid with an arc-shaped chamfer is in contact with the landing surface. There are 2 to 3 connecting rods in the middle that are compositely connected to the inclined rods on both sides. The curved parts of the bamboo composite support frame components are all arc-shaped transitions, and the arc curvature of the component and the cross-sectional area of ​​the body are adjusted according to the stress conditions.

2. The bamboo composite support frame structure according to claim 1, characterized in that: The bamboo unit is a defect-free bamboo strip of standard size, preferably a rectangular cross-section bamboo strip processed from the green side of the bamboo.

3. The bamboo composite support frame structure according to claim 1, characterized in that: The cross-sectional shape and size specifications of the middle connecting rod should be designed according to the inclination angles of the inclined rods on both sides, the maximum load of the UAV and the landing ground conditions.

4. The bamboo composite support frame structure according to claim 1, characterized in that: The composite connection refers to a double or multiple connection using gluing and mechanical methods, including gluing plus shallow groove bundling, gluing plus alloy clip positioning bolt connection, or gluing plus alloy ring bite connection.

5. A method for manufacturing a bamboo composite support frame member for a medium-load UAV, characterized in that: The specific steps are as follows: S1. Select 5- to 6-year-old defect-free bamboo materials, add 32 to 50 mm to the design dimensions of the support frame components, cut them to a fixed length, and then split them circumferentially to obtain curved bamboo strips with a width of 12 mm ≤ ≤ 22 mm. Plane the bamboo strips obtained by splitting them in the thickness direction within the range of 1 / 3 to 2 / 5 near the green side of the bamboo to obtain rectangular cross-section bamboo strips, then perform conventional anti-corrosion, anti-mildew, and anti-insect treatments on them. Finally, dry them at a temperature of ≤ 100°C to a moisture content of less than 16%, and then finely process them to obtain standard bamboo strips with a thickness of ≤ 3 mm, which are stored in a balance room for future use. S2. Purchase phenolic resin glue from glue-making enterprises, use aqueous solvent to dilute to a concentration range of 22% to 25% to obtain impregnation glue solution, and impregnate the standard bamboo strips obtained in step S1 through the device in "A High-efficiency Impregnation Device for Bamboo Units" submitted simultaneously with the present application. The surface layer of the outlet roller group in "A High-efficiency Impregnation Device for Bamboo Units" uses rubber material to control the amount of glue applied to the surface of the standard bamboo strips. The center roller group in "A High-efficiency Impregnation Device for Bamboo Units" controls the extrusion strength of the bamboo filaments to cause the standard bamboo strips to undergo 12% to 16% lateral deformation. The standard bamboo strips after glue extrusion are then dried to a moisture content of ≤16% for standby use. S3. Select a movable mold body and a static mold body made of hot-working die steel that match the shape of the medium-loaded bamboo composite support frame component, and perform two consecutive movable mold operations of low-pressure initial forming and high-pressure final forming. The movement direction of the movable mold body is perpendicular to the axial direction of the support frame component. The movable mold body is divided into blocks according to the shape of the bamboo composite support frame component. The straight type is divided into one block, the curved type is divided into multiple blocks, the bending angle is ≤40° is divided into one block, the bending angle is 40°<≤80° is divided into two blocks, and the bending angle is 80°<≤120° is divided into three blocks. , 120°<bending angle≤160° is 4 pieces, 160°<bending angle≤200° is 5 pieces, 200°<bending angle≤240° is 6 pieces, there is a rectangular meshing space of 15~45mm between adjacent movable molds, within the above bending angle range, the larger the bending angle, the larger the meshing space, each closed space corresponds to the static mold body is 1 piece, when the movable mold body and the static mold body are in a closed working state, the cross-sectional area of ​​the bamboo composite support frame member entity that can be formed is ≥700mm 2 、Ring cross-sectional area ≥490mm 2 A circular cross-section heat exchange channel is provided inside the movable mold body and the static mold body. The diameter of the channel is 10 to 22 mm. For other structures of the mold, please refer to the "A bamboo support frame manufacturing equipment and operation method for drones" submitted at the same time as this application. S4, the bamboo strips obtained in step S2 are oriented and laid into the mold obtained in step S3, and the laying amount is 0.9-1.0 g / cm2 of the closed volume of the mold (that is, the final molding volume of the bamboo component). 3 The weight calculated by density is hydraulically pressurized, and the pressurization direction is perpendicular to the axial direction of the bamboo component, with a vertical deviation of ≤±2.5°. The first pressurization is high-speed and low-pressure pressurization, which compresses the bamboo component to 1.15-1.25 times the final molding volume. The second pressurization is low-speed and high-pressure pressurization, which compresses the bamboo component to the final molding volume, that is, the mold is completely closed. At the beginning of the pressurization process, the temperature in the static mold is 150℃~170℃, and the temperature in the dynamic mold is 10℃~15℃ higher than the static mold temperature. The type of heating medium and the flow rate are determined by the company's own conditions combined with the actual temperature of the contact surface between the mold and the standard bamboo strips. Superheated steam and heat transfer oil are preferred. After the mold is fully closed for 12-17 minutes, the mold is automatically demoulded to obtain the bamboo component rough material, which is placed in a balancing room for curing with a curing time of ≥4.5h. S5. Place the bamboo component raw material obtained in step S4 into a rotary polishing device for surface polishing. The polishing medium in the rotary polishing tank is bamboo particles with a length or width of 5 mm to 25 mm, a thickness of 3 mm to 10 mm, and an air-dry density of ≥0.7 g / cm 3 , moisture content ≤ 7%, filling volume is 60% ~ 72%, polishing tank diameter ≥ 4 times the height or width of the bamboo component, polishing tank length ≥ 3 times the length of the bamboo component, polishing tank speed ≥ 240r / min. S6. The bamboo composite support frame components obtained in step S5 are subjected to post-processing, including quality inspection, connection hole and groove processing, composite connection, coating of a protective layer, sampling performance test, etc.

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