Helicopter composite material blade flexible spraying device and using method

Abstract

The invention belongs to the technical field of spraying, and relates to a flexible spraying device for a helicopter composite material blade and a using method. The device comprises supporting legs, a supporting base and a supporting cylinder with the height capable of being adjusted in a self-adaptive mode, the device is flexible in height, high in adaptability and capable of being suitable for paddles of various sizes and shapes, a unified paint spraying platform is provided for paddles of different models, the trouble that equipment is frequently replaced due to different models is avoided, and the production efficiency is greatly improved. According to the use method, detailed operation processes and specifications are formulated through design and optimization, so that operators can quickly master and skillfully apply. And no matter a small paddle or a large paddle, accurate paint spraying can be achieved, the paint spraying uniformity and consistency are ensured, and the appearance quality and the protection performance of the paddle are improved. Moreover, due to the multi-model shared design, the equipment investment and occupied space are reduced, the production cost of an enterprise is reduced, higher economic benefits are brought to the enterprise, an innovative solution is provided for the paddle paint spraying industry, and the technological progress and development of the industry are promoted.

Description

Technical Field

[0001] The invention belongs to the technical field of spraying, and relates to a flexible spraying device for helicopter composite material blades and a use method thereof. Background Art

[0002] During the manufacturing process of composite blades, it is necessary to spray paint other locations on the blade surface except for the metal cladding area. On the one hand, it can effectively prevent the corrosion of composite blades in the natural environment and improve the weather resistance of the blades. On the other hand, it can improve the appearance of the blades. At present, the blades are placed on a special tooling for spraying. Grooves are set on the tooling according to the thickness of the blades. The blades are erected in the grooves and kept in a vertical state for spraying. First of all, in order to ensure the uniformity of force, each special device is only suitable for one model of blades. In addition, when the blades need to be in a flat state for grinding, storage, etc., the special tooling cannot be used, and a parking vehicle is required, resulting in low processing efficiency and low tooling utilization.

[0003] A patent discloses a blade painting tool, including a blade fixing device and several blade supporting devices, wherein the blade fixing device has a fixed wheel and a movable wheel installed at the lower part of the base, a jack installed on the side, a frame installed on the upper part, on which a fixing plate connected to the blade wing root is installed, and the bottom is a tripod for clamping the blade.

[0004] A certain patent relates to a turbine blade spraying tool, comprising: a connecting plate, a support rod, a base, an upper cavity and a lower cavity. The support rod is fixedly provided on the connecting plate, the base is fixedly provided on the top of the support rod, the lower cavity is fixedly provided on the base, an upper cavity is provided vertically above the lower cavity, and locking parts for locking the turbine blades are provided on the side walls of the upper cavity and the lower cavity.

[0005] A document discloses a low-pressure guide blade spraying tool, including a supporting mechanism for supporting the entire tool on the impeller, and a rotating mechanism for driving the entire tool to rotate on the impeller, and the supporting mechanism is located on one side of the rotating mechanism. The air joint on the sealing plate and the first vacuum generator are used to inflate and evacuate the inside of the protective groove, so that the protective leather cover can be extended and retracted from the protective groove, and then the two sides of the fan blades to be sprayed are closed, and the paint generated by the spraying is prevented from scattering to the outer area of ​​the blades. The fan blades are sprayed at the same time by the nozzles on the upper and lower sides of the U-shaped frame, and the collecting hood, the filter screen plate and the second vacuum generator are used to evacuate the inside of the U-shaped frame to form a low pressure to reduce the paint from scattering to the outside, so that the paint sprayed by the nozzle follows the flow of gas and adheres to the blades on the inner side of the U-shaped frame.

[0006] The tools and methods of use in the published literature are all fixed tools, or have a very high compatibility with the product. Products of different specifications require special tools, and it is difficult for products of different models and specifications to be compatible. For example, an automated painting tool designed for a certain type of blade may not be well suited for other blades with large differences in shape or size, which limits the application of the tool in the production of a variety of products. It is unable to meet the production characteristics of helicopter blade products with multiple varieties and small batches, as well as the flexibility of production, and cannot achieve rapid changeover to meet the painting needs of a variety of blades. Summary of the invention

[0007] Purpose of the Invention

[0008] The invention is a flexible spraying device and a method for using composite helicopter blades that are shared by multiple models. The purpose is to meet the painting needs of blades of different models, improve the efficiency and quality of the painting operation, and reduce production costs. Through a detailed analysis of the size, shape and characteristics of blades of different models, the limitations of traditional painting devices when facing multiple models of blades are analyzed. After a lot of field research and repeated experiments, a blade painting device shared by multiple models is successfully designed. This device is highly flexible and adaptable. It can be applied to blades of various sizes and shapes, providing a unified painting platform for blades of different models, avoiding the trouble of frequent equipment replacement due to different models, and greatly improving production efficiency. In terms of usage, after careful design and optimization, detailed operation procedures and specifications are formulated so that operators can quickly master and use them proficiently. Whether it is a small or large blade, precise painting can be achieved to ensure the uniformity and consistency of the painting, and improve the appearance quality and protective performance of the blade. Moreover, the design shared by multiple models reduces equipment investment and space occupation, reduces the production cost of enterprises, brings higher economic benefits to enterprises, and also provides innovative solutions for the blade painting industry to promote technological progress and development in the industry.

[0009] Technical Solution

[0010] A helicopter composite blade flexible spraying device is composed of a support foot, a support seat and a support cylinder with adaptive height adjustment. The support seat is made of metal and is in the shape of a regular cuboid with a length of l1, a width of w1 and a height of d1. The surface is designed with cross-arranged circular deep hole grooves with a groove diameter of D0. Hard rubber and sponge are placed in the grooves. The diameters of the hard rubber and sponge are both designed to be D1. Sponges are arranged inside the deep holes to ensure that the support cylinder rebounds to the original height after the blade product is separated from the device. The designed groove depth is H0. The first layer at the bottom of the groove is hard rubber, sponge is placed on the hard rubber, and hard rubber is placed on the upper layer. This is repeated continuously. The top layer should be designed to be hard rubber. After stacking n layers, it becomes a support layer, and the designed support layer thickness is H1. Assume that the stiffness coefficient of the hard rubber in the groove is k1, the stiffness coefficient of the sponge is k2, and the initial thickness is H1; Assume that the height of the support cylinder is H2, the bottom radius is r, r=D1 / 2, and the shape is a cylinder.

[0011] Furthermore, the outside of the supporting cylinder is coated with plastic.

[0012] Furthermore, the coating plastic is specifically polytetrafluoroethylene.

[0013] Furthermore, D0-D1=0.2mm~0.3mm.

[0014] Furthermore, the thickness of the single layer of hard rubber and the single layer of sponge are both 10 mm.

[0015] Furthermore, H0-H1=30mm~40mm.

[0016] Furthermore, the supporting cylinder is made of high-strength metal material.

[0017] Further, the flexible spraying device adjustment mechanism includes the following:

[0018] (1) Calculation of force balance relationship

[0019] 1) Assume that the blade gravity is G, and the support force of the support column and the support layer is N. In the equilibrium state, according to the force balance, we can get: G = N.

[0020] 2) When the blade is placed on the support device, the gravity of the blade causes the hard rubber support to deform, generating an upward elastic force. According to Hooke's law, N = kx, where k is the stiffness coefficient of the support layer and x is the deformation of the support layer;

[0021] (5) Design of support column and support layer height

[0022] 1) Assume that the blade metal cover has a coverage width of h0 at the blade edge. To ensure that the support column descends to a height equal to the blade cover width, and to avoid the blade being blocked and affecting the paint coverage, or the blade tilting and falling due to insufficient descent, the overall height of the support column is designed to be 3h0, and the thickness of the support layer is designed to be at least 2h0.

[0023] (6) Support layer material design

[0024] 1) Let the stiffness coefficient of rubber be k1 and that of sponge be k2. Assume that the compression of rubber alone is x1, the compression of sponge alone is x2, and the overall compression is x. Under the same pressure F, x=x1+x2=F / k1+F / k2, and because F=kx, so F=k(F / k1+F / k2), we can get the stiffness coefficient of the support layer k=k1k2 / (k1+k2).

[0025] 2) According to the relationship between the compression of the support layer and the descending distance of the support column, the compression of the support layer ΔH should be equal to the descending height h of the support column, that is, ΔH = h. And ΔH = H1-H, so H = H1-h.

[0026] 3) Therefore, G=N=kx=[k1k2 / (k1+k2)]ΔH, the height h of the support column descent is equal to the compression amount ΔH of the support layer and the width h0 of the package, so (k1+k2) / k1k2=G / ΔH=G / h0.

[0027] 4) Therefore, the elastomer can be selected as the material of the support layer according to the width of the wrap and the weight of the blade.

[0028] (7) Adjustment method

[0029] The adjustment mechanism of the support device is mainly achieved by the pressure of the blade on the device. When the blade is placed on the support device, the weight of the blade causes the support column and the support layer to deform, thereby generating an upward elastic force. The elastic force of the support column and the support layer interacts with the weight of the blade and the support force of the support column to achieve force balance. The height adjustment of the support column automatically responds to changes in the weight of the blade. By lowering and squeezing the support seat, the deformation of the hard rubber support increases, thereby achieving adaptive support for blades of different weights.

[0030] Further, the method of using the flexible spraying device

[0031] The specific method is as follows:

[0032] (1) Preparation stage: Check that the flexible spray device is fixed and the support column can be freely extended and retracted. Check the pressure, flow rate and nozzle status of the spray system to ensure a good spray effect. Prepare positioning auxiliary equipment and lifting equipment and check whether their performance is normal.

[0033] (2) Blade transfer: Use a special lifting device to clamp the blade through the bushing hole and determine the lifting position and placement position of the blade within the working area.

[0034] (3) Positioning stage: The operator controls the movement of the lifting equipment through the remote control, observes the instructions of the laser positioning device, and adjusts the position of the lifting equipment in real time. Use the red light emitted by the laser positioning device to adjust the placement of the blade on the flexible spraying device to the center. During the positioning process, the center of gravity and shape of the blade must be taken into account to ensure the stability of the lifting and placement process.

[0035] (4) Placement stage: When the propeller blade approaches the fixed position, slowly reduce the lifting speed to ensure that the propeller blade enters the fixture vertically and smoothly. When the propeller blade enters the fixture, be careful to avoid collision with the fixture to avoid damage to the propeller blade or the fixture. Maintain the lifting force until the propeller blade is completely received by the flexible spray device.

[0036] (5) Inspection stage: Check again whether the fixture and support rod are adjusted in place to ensure that the blades will not move during the painting process.

[0037] (6) Spraying stage: The blades are sprayed using manual spraying or a robotic spraying system.

[0038] (7) Drying stage: After painting, the blades are dried.

[0039] (8) Blade removal: When the paint layer is dry, use a lifting device to remove the blade from the fixture. During the lifting process, ensure that the operation is accurate and stable to avoid damage to the paint layer. The operator should slowly raise the height of the lifting equipment and observe the condition of the blade to ensure that the blade leaves the fixture smoothly. Lift the blade to the designated storage area or transportation equipment to complete the delivery.

[0040] (9) Inspection: Perform a final inspection on the painted blades to check whether the quality, thickness, uniformity and other indicators of the paint layer meet the requirements. If any quality problems are found in the paint layer, it can be repaired by sanding, repainting, etc. to ensure that the paint quality of the blades meets the standards.

[0041] (10) Painting of different models of products: Repeat (1) to (9), leaving the paddle spray flexible device in place and continuing to use it without replacement.

[0042] The beneficial effects of this application are:

[0043] The flexible spraying device for helicopter composite blades is mainly used for painting helicopter composite main blades. As a support and transfer device for workpieces, it solves the problems in the prior art that special tooling has large restrictions on the shape of the workpiece, and in the production mode of multiple varieties and small batches, the production cost of special support devices is high, and storage occupies production area. This method has been systematically tested and verified in application, and can meet the needs of automatic painting and transfer of helicopter main blades. The operating effect is excellent. The compatibility of the device with various types of helicopter blades reaches 100%, the workpiece turnover efficiency is improved by 40%, and the tooling area is saved by 50%. It fundamentally solves the bottleneck problems in the automatic painting production line, such as the poor flexibility of the blade spraying device, and has broad promotion value. The present invention has the following novelty and creativity:

[0044] (1) The flexible support mechanism is creatively adopted to provide flexible support according to the shape of main blades of different specifications. Based on the fact that some areas of the blades are not painted, the blade wrapping position is in contact with the support device to avoid marks caused by clamping and eliminate the need for secondary repainting.

[0045] (2) For the first time, a design algorithm for a flexible spray coating device for composite main blades was proposed. Based on the blade weight and the wrap width, theoretical calculations were used to assist in selecting the material of the support layer.

[0046] (3) In addition to being used for blade spraying, the present invention can also be used in scenarios such as blade transportation and storage. The blade is placed flat on the device, and the support columns in the pressure-bearing area are lowered so that the side and bottom surfaces of the blade are surrounded by the support columns, thereby enhancing the safety of blade product transportation and storage. It also has the versatility of multiple types of blade products, saving the manufacturing cost of blade transportation and storage devices. BRIEF DESCRIPTION OF THE DRAWINGS

[0047] Figure 1 The invention is composed of a composite material blade flexible spraying device.

[0048] Figure 2 It is a schematic diagram of the spraying state of the composite material blade flexible spraying device.

[0049] Figure 3 It is a schematic diagram of the blade transfer state of the composite material blade flexible spraying device.

[0050] Figure 4 It is a flow chart of the use of the device. DETAILED DESCRIPTION

[0051] In order to make the purpose, technical scheme and advantages of the implementation of the present invention clearer, the technical scheme in the embodiment of the present invention will be described in more detail in combination with the embodiment of the present invention. In the example, the same or similar reference numerals throughout represent the same or similar originals or elements with the same or similar functions. The described embodiments are part of the embodiments of the present invention, not all of them. The embodiments described below by reference are exemplary and intended to be used to explain the present invention, and should not be construed as limitations on the present invention. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in the field without making creative work belong to the scope of protection of the present invention. The following is a detailed description in combination with the embodiments of the present invention.

[0052] Helicopter composite blade flexible spraying device and use method, the scheme is as follows:

[0053] 1. Flexible spraying device composition and design algorithm

[0054] The helicopter blade flexible spraying device is mainly composed of a support foot, a support seat and a support cylinder with adaptive height adjustment ( Figure 1 ). The support seat is made of metal and is in the shape of a regular cuboid with a length of l1, a width of w1, and a height of d1. The surface is designed with cross-arranged circular deep hole grooves with a groove diameter of D0. Hard rubber and sponge are placed in the grooves. The diameters of hard rubber and sponge are both designed to be D1, and the design D0-D1=0.2mm~0.3mm. Sponges are arranged inside the deep holes to ensure that the support cylinder rebounds to its original height after the paddle product is separated from the device. The designed groove depth is H0. The first layer at the bottom of the groove is hard rubber, sponge is placed on the hard rubber, and hard rubber is placed on the upper layer. This is repeated continuously, and the top layer should be designed to be hard rubber. The thickness of a single layer of hard rubber and a single layer of sponge is 10mm. After stacking n layers, they become support layers. The designed support layer thickness is H1, H0-H1=30mm~40mm. Assume that the stiffness coefficient of the hard rubber in the groove is k1, the stiffness coefficient of the sponge is k2, and the initial thickness is H1. The support cylinder is made of high-strength metal. To avoid scratches and bumps on the surface of the helicopter blades when in contact with the helicopter blades, the support cylinder is coated with plastic. In order to facilitate cleaning after the paint layer is attached, polytetrafluoroethylene plastic is preferably used as the coating material. Assume that the height of the support cylinder is H2, the bottom radius is r, r = D1 / 2, and the shape is a cylinder.

[0055] 2. Flexible spraying device adjustment mechanism

[0056] (1) Calculation of force balance relationship

[0057] 1) Assume that the blade gravity is G, and the support force of the support column and the support layer is N. In the equilibrium state, according to the force balance, we can get: G = N.

[0058] 2) When the blade is placed on the support device, the gravity of the blade causes the hard rubber support to deform, generating an upward elastic force. According to Hooke's law, N = kx (where k is the stiffness coefficient of the support layer and x is the deformation of the support layer).

[0059] (8) Design of support column and support layer height

[0060] 1) Assume that the blade metal cover has a coverage width of h0 at the blade edge. To ensure that the support column descends to a height equal to the blade cover width, and to avoid the blade being blocked and affecting the paint coverage, or the blade tilting and falling due to insufficient descent, the overall height of the support column is designed to be 3h0, and the thickness of the support layer is designed to be at least 2h0.

[0061] (9) Support layer material design

[0062] 1) Let the stiffness coefficient of rubber be k1 and that of sponge be k2. Assume that the compression of rubber alone is x1, the compression of sponge alone is x2, and the overall compression is x. Under the same pressure F, x=x1+x2=F / k1+F / k2, and because F=kx, so F=k(F / k1+F / k2), we can get the stiffness coefficient of the support layer k=k1k2 / (k1+k2).

[0063] 2) According to the relationship between the compression of the support layer and the descending distance of the support column, the compression of the support layer ΔH should be equal to the descending height h of the support column, that is, ΔH = h. And ΔH = H1-H, so H = H1-h.

[0064] 3) Therefore, G=N=kx=[k1k2 / (k1+k2)]ΔH, the height h of the support column descent is equal to the compression amount ΔH of the support layer and the width h0 of the package, so (k1+k2) / k1k2=G / ΔH=G / h0.

[0065] 4) Therefore, according to the width of the wrapping sheet and the weight of the blade, an appropriate elastomer can be selected as the material of the supporting layer.

[0066] (10) Adjustment method

[0067] The adjustment mechanism of the support device is mainly achieved by the pressure of the blade on the device. When the blade is placed on the support device, the weight of the blade causes the support column and the support layer to deform, thereby generating an upward elastic force. The elastic force of the support column and the support layer interacts with the weight of the blade and the supporting force of the support column to achieve force balance. The height adjustment of the support column will automatically respond to changes in the weight of the blade. By lowering and squeezing the support seat, the deformation of the hard rubber support will increase, thereby achieving adaptive support for blades of different weights. The entire adjustment process does not require manual intervention, which can ensure that the support device can provide stable and reliable support for the helicopter blades under different working conditions.

[0068] 3. How to use the flexible spraying device

[0069] The specific method is as follows:

[0070] (1) Preparation stage: Check that the flexible spray device is fixed and the support column can be freely extended and retracted. Check the pressure, flow rate and nozzle status of the spray system to ensure a good spray effect. Prepare positioning auxiliary equipment and lifting equipment and check whether their performance is normal.

[0071] (2) Blade transfer: Use a special lifting device to clamp the blade through the bushing hole and determine the lifting position and placement position of the blade within the working area.

[0072] (3) Positioning stage: The operator controls the movement of the lifting equipment through the remote control, and at the same time observes the instructions of the laser positioning device to adjust the position of the lifting equipment in real time. Using the red light emitted by the laser positioning device, the operator adjusts the placement of the blade on the flexible spraying device to the center. During the positioning process, the center of gravity and shape of the blade must be taken into account to ensure the stability of the lifting and placement process.

[0073] (4) Placement stage: When the propeller blade approaches the fixed position, slowly reduce the lifting speed to ensure that the propeller blade enters the fixing device vertically and smoothly. Figure 2 ). When the blade enters the fixture, be careful to avoid collision with the fixture to avoid damage to the blade or the fixture. Maintain the lifting force until the blade is completely received by the flexible spray device.

[0074] (5) Inspection stage: Check again whether the fixture and support rod are adjusted in place to ensure that the blades will not move during the painting process.

[0075] (6) Spraying stage: The blades are sprayed using manual spraying or a robotic spraying system.

[0076] (7) Drying stage: After painting, the blades are dried.

[0077] (8) Blade removal: When the paint layer is dry, use a lifting device to remove the blade from the fixture. During the lifting process, ensure that the operation is accurate and stable to avoid damage to the paint layer. The operator should slowly raise the height of the lifting equipment and observe the condition of the blade to ensure that the blade leaves the fixture smoothly. Lift the blade to the designated storage area or transportation equipment to complete the delivery.

[0078] (9) Inspection: Perform a final inspection on the painted blades to check whether the quality, thickness, uniformity and other indicators of the paint layer meet the requirements. If any quality problems are found in the paint layer, it can be repaired by sanding, repainting, etc. to ensure that the paint quality of the blades meets the standards.

[0079] (10) Painting of different models of products: Repeat (1)-(9), and leave the paddle spray flexible device in place and continue to use it without replacement. Figure 3 .

[0080] It is understood by those skilled in the art that, unless otherwise defined, all terms (including technical terms and scientific terms) used herein have the same meaning as the general understanding of ordinary technicians in the field to which the present invention belongs. It should also be understood that terms such as those defined in general dictionaries should be understood to have the same meaning as in the context of the prior art, and unless defined as here, will not be interpreted with idealized or overly formal meanings. The specific implementation methods described above further describe the purpose, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above description is only a specific implementation method of the present invention and is not intended to limit the present invention. Within the spirit and principle of the present invention, any technician familiar with the profession may use the above disclosed technical content to change or modify it into an equivalent embodiment of equivalent changes for application in other fields, but any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention without departing from the technical solution content of the present invention, any modification, equivalent replacement, improvement, etc., made according to the technical essence of the present invention, should be included in the protection scope of the present invention.

Claims

1. A helicopter composite blade flexible spraying device, characterized in that: It consists of a supporting foot, a supporting seat and a supporting cylinder with adaptive height adjustment; the supporting seat is made of metal and is in the shape of a regular rectangular parallelepiped with a length of l1, a width of w1 and a height of d1; the surface is designed with cross-arranged circular deep hole grooves with a groove diameter of D0, hard rubber and sponge are placed in the grooves, and the diameters of the hard rubber and sponge are both designed to be D1, and sponges are arranged inside the deep holes to ensure that the supporting cylinder rebounds to the original height after the paddle product is separated from the device; the designed groove depth is H0; the first layer at the bottom of the groove is hard rubber, sponge is placed on the hard rubber, and hard rubber is placed on the upper layer, and this is repeated continuously, and the designed top layer should be hard rubber; after stacking n layers, it becomes a supporting layer, and the designed supporting layer thickness is H1; let the stiffness coefficient of the hard rubber in the groove be k1, the stiffness coefficient of the sponge be k2, and the initial thickness be H1; let the height of the supporting cylinder be H2, the bottom radius be r, r=D1 / 2, and the shape be a cylinder.

2. The device according to claim 1, characterized in that The supporting cylinder is externally covered with plastic.

3. The device according to claim 2, characterized in that The coating plastic is specifically polytetrafluoroethylene.

4. The device according to claim 3, characterized in that The D0-D1=0.2mm~0.3mm.

5. The device according to claim 4, characterized in that The thickness of the single layer of hard rubber and the single layer of sponge are both 10 mm.

6. The device according to claim 5, characterized in that The H0-H1=30mm~40mm.

7. The device according to claim 6, characterized in that The supporting cylinder is made of high-strength metal.

8. The device according to claim 7, characterized in that The flexible spray device adjustment mechanism includes the following: (1) Calculation of force balance relationship 1) Assume that the blade gravity is G, and the support force of the support column and the support layer is N; in the equilibrium state, according to the force balance, we can get: G = N; 2) When the blade is placed on the support device, the gravity of the blade causes the hard rubber support to deform, generating an upward elastic force; According to Hooke's law, N = kx, where k is the stiffness coefficient of the support layer and x is the deformation of the support layer; (2) Design of support column and support layer height 1) Assuming that the blade metal cladding covers the blade edge with a width of h0, in order to ensure that the support column descends to a height equal to the blade cladding width, to avoid the blade being blocked and affecting the paint coverage, or the blade tilting and falling due to insufficient descent, the overall height of the support column is designed to be 3h0, and the thickness of the support layer is designed to be at least 2h0; (3) Support layer material design 1) Assume that the stiffness coefficient of rubber is k1 and that of sponge is k2; Assume that the compression amount of rubber alone is x1, the compression amount of sponge alone is x2, and the overall compression amount is x. Under the same pressure F, x=x1+x2=F / k1+F / k2, and because F=kx, so F=k(F / k1+F / k2), and the stiffness coefficient of the support layer can be obtained as k=k1k2 / (k1+k2); 2) According to the relationship between the compression of the support layer and the descending distance of the support column, the compression of the support layer ΔH should be equal to the descending height h of the support column, that is, ΔH=h; and ΔH=H1-H, so H=H1-h; 3) Therefore, G = N = kx = [k1k2 / (k1+k2)]ΔH, the height of the support column h, the compression of the support layer ΔH and the width of the package h0 are equal, so (k1+k2) / k1k2 = G / ΔH = G / h0; 4) Therefore, the elastic body can be selected as the material of the supporting layer according to the width of the wrapping sheet and the weight of the blade; (4) Adjustment method The adjustment mechanism of the support device is mainly achieved by the pressure of the blade on the device; when the blade is placed on the support device, the gravity of the blade causes the support column and the support layer to deform, thereby generating an upward elastic force; the elastic force of the support column and the support layer interacts with the gravity of the blade and the supporting force of the support column to achieve force balance; the height adjustment of the support column will automatically respond to changes in the gravity of the blade, and by lowering and squeezing the support seat, the deformation of the hard rubber bearing will increase, thereby achieving adaptive support for blades of different weights.

9. The method for using the device according to claim 8, characterized in that: The steps include: (1) Preparation stage: Check that the flexible spray device is fixed and the support column can be freely extended and retracted; check the pressure, flow rate and nozzle status of the spray system to ensure a good spray effect; Prepare positioning auxiliary equipment and lifting equipment, and check whether their performance is normal; (2) Blade insertion: Use a special lifting device to clamp the blade through the bushing hole and determine the lifting position and placement position of the blade in the working area; (3) Positioning stage: The operator controls the movement of the lifting equipment through the remote control, observes the instructions of the laser positioning device, and adjusts the position of the lifting equipment in real time; uses the red light emitted by the laser positioning device to adjust the placement of the blade on the flexible spraying device to the center; during the positioning process, the center of gravity and shape of the blade must be taken into account to ensure the stability of the lifting and placement process; (4) Placement stage: When the blade approaches the fixed position, slowly reduce the lifting speed to ensure that the blade enters the fixture vertically and smoothly; when the blade enters the fixture, be careful to avoid collision with the fixture to avoid damage to the blade or the fixture; maintain the lifting force until the blade is completely received by the flexible spraying device; (5) Inspection stage: Check again whether the fixture and support rods are adjusted in place to ensure that the blades will not move during the painting process; (6) Spraying stage: Spraying the blades by manual spraying or robotic spraying system; (7) Drying stage: After the painting is completed, the blades are dried; (8) Blade removal: When the paint layer is dry, use lifting equipment to remove the blade from the fixture. During the lifting process, ensure that the operation is accurate and stable to avoid damage to the paint layer. The operator should slowly raise the height of the lifting equipment and observe the condition of the blade to ensure that the blade leaves the fixture smoothly. Lift the blade to the designated storage area or transportation equipment to complete the delivery. (9) Inspection: Perform a final inspection on the painted blades to check whether the quality, thickness, uniformity and other indicators of the paint layer meet the requirements. If any quality problems are found in the paint layer, repairs can be made by sanding, repainting, etc. to ensure that the paint quality of the blades meets the standards.

10. The method of use according to claim 9, characterized in that: It also includes (10) painting different models of products: repeating (1)-(9), and the paddle spraying flexible device is placed in place and continues to be used without replacement.

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