Composite skin forming tool of small unmanned aerial vehicle

Abstract

The utility model discloses a small unmanned aerial vehicle composite skin forming tool, and relates to the technical field of aviation. The small unmanned aerial vehicle composite skin forming tool comprises a frame, a template and a connecting cushion block are installed on the frame, and the template and the frame are connected through the connecting cushion block, so that different models of templates can be installed on the frame, and the template and the frame are convenient to assemble and disassemble; the shape of the connecting cushion block can be correspondingly adjusted according to the shapes of the templates of different models, so that the novel template can be conveniently connected with the frame. According to the composite skin forming tool for the small unmanned aerial vehicle, the bottom frame and the template are connected through the connecting cushion blocks, so that after the structure of the small unmanned aerial vehicle is changed, it can be guaranteed that the bottom frame and the template are convenient to disassemble and assemble, the frame can be directly connected with a newly-manufactured template, only a small number of connecting cushion blocks need to be manufactured, and good economical efficiency is achieved; the movable insert is arranged on the template, so that the product can be smoothly demoulded when a negative angle exists.

Description

Technical Field

[0001] This utility model relates to the field of aviation technology, specifically to a tooling for forming composite skin for small unmanned aerial vehicles. Background Technology

[0002] The molding of composite material skins requires specialized process equipment (hereinafter referred to as tooling). As the requirements for the performance and surface quality of composite material skins become increasingly stringent, the cost and complexity of tooling also increase. For example, to meet the requirements for the coefficient of thermal expansion and reusability of composite tooling, Invar steel is typically chosen as the main material. Invar steel, also known as non-expanding steel, has an average coefficient of thermal expansion of 1.5 × 10⁻⁶ °C, reaching 1.8 × 10⁻⁸ °C when containing 36% nickel. Furthermore, its coefficient of thermal expansion remains essentially unchanged between -80 °C and 180 °C, effectively meeting the molding requirements of composite parts. However, this material is also dozens of times more expensive than ordinary carbon steel, directly leading to a significant increase in the manufacturing cost of parts.

[0003] Currently, special composite skin tooling made of Invar steel is usually made by welding whole plates together and processing with CNC machine tools. Although this processing method can meet the usage requirements, the manufacturing cost is relatively high.

[0004] The current trend in the research and development and manufacturing of small drones is towards a variety of products and small batches. Taking a certain model of drone as an example, after small-batch production and delivery, due to issues such as design, process difficulty, or cost, the original design configuration was iterated, resulting in significant changes to the product's shape and structure. This rendered the original tooling unusable, requiring the manufacture of new tooling for the production of the new model. This not only caused a significant increase in costs but also affected the research and development progress of the new model. Utility Model Content

[0005] To address the shortcomings of existing technologies, this utility model provides a composite skin molding tooling for small unmanned aerial vehicles (UAVs). This tooling solves the problem that after small-batch production and delivery of some small UAVs, due to design, process difficulty, or cost issues, the original design configuration has been iterated, resulting in significant changes to the product's shape and structure. This renders the original tooling unusable, requiring the manufacture of new tooling for the production of new models. This not only significantly increases costs but also affects the development progress of new models.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a small unmanned aerial vehicle (UAV) composite skin molding fixture, comprising a frame, on which a template and connecting pads are mounted, the template and the frame are connected by the connecting pads, the connecting pads comprising right-angle pads, the right-angle pads being composed of horizontal blocks, vertical blocks, support blocks and fastening bolts, the horizontal blocks and vertical blocks being fixedly connected, one side of the support block being fixedly connected to the horizontal block and the other side being fixedly connected to the vertical block, and multiple fastening bolts being provided, with the fastening bolts respectively disposed on the horizontal blocks and the vertical blocks;

[0007] The horizontal blocks are connected to the template, and the vertical blocks are connected to the frame.

[0008] Preferably, the frame is made of 10mm thick Invar steel plate. The tooling made of Invar steel has a much higher thermal stability than carbon steel, which can effectively reduce the thermal deformation of the tooling during use. The frame is provided with a longitudinal partition along the width direction and a transverse partition along the length direction. The frame is also provided with a hanging joint and a lifting square tube for moving and transporting the frame to facilitate demolding.

[0009] Preferably, the connecting pad further includes a curved pad, which is composed of an arc-shaped block, a connecting block, and fastening bolts. The connecting block is fixedly connected to the bottom of the arc-shaped block, and the fastening bolts are respectively disposed on the arc-shaped block and the connecting block.

[0010] Preferably, the arc-shaped block is connected to the template, and the connecting block is connected to the frame.

[0011] Preferably, the template is provided with a movable insert, which is connected to the frame via a connecting block.

[0012] This utility model discloses a composite skin forming tooling for small unmanned aerial vehicles (UAVs), which has the following beneficial effects:

[0013] 1. This small drone composite skin molding fixture connects the bottom frame and the mold plate through connecting pads, ensuring that the bottom frame and mold plate can be easily disassembled and assembled after the small drone's structure is modified. The frame can be directly connected to the new mold plate, requiring only a small number of connecting pads, which is economical. The movable inserts on the mold plate ensure that the product can be demolded smoothly when there is a negative angle.

[0014] 2. The composite skin forming tooling for this small UAV, made of Invar steel, has a much higher thermal stability than ordinary carbon steel, which can effectively reduce the thermal deformation of the tooling during use. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the structure of this utility model;

[0017] Figure 2 This is a schematic diagram of the frame structure of this utility model;

[0018] Figure 3 This is a schematic diagram of the right-angle pad structure of this utility model;

[0019] Figure 4 This is a schematic diagram of the curved pad structure of this utility model.

[0020] In the diagram: 1. Frame; 11. Hanging joint; 12. Lifting square tube; 2. Profile plate; 3. Connecting pad; 31. Right angle pad; 311. Horizontal block; 312. Vertical block; 313. Support block; 314. Fastening bolt; 32. Curved pad; 321. Arc block; 322. Connecting block; 4. Movable insert. Detailed Implementation

[0021] To better understand the above technical solutions, the following will provide a detailed explanation of the technical solutions in conjunction with the accompanying drawings and specific implementation methods.

[0022] This utility model discloses a tooling for forming composite skin for small unmanned aerial vehicles.

[0023] According to the appendix Figure 1-4 As shown, the fixture includes a frame 1, which is made of 10mm thick Invar steel plate. The tooling made of Invar steel has a much higher thermal stability than carbon steel, which can effectively reduce the thermal deformation of the tooling during use. The frame 1 has 3 longitudinal partitions along the width direction and 8 transverse partitions along the length direction. The frame 1 is equipped with a profile plate 2 and connecting pads 3. The profile plate 2 is made of 12-16mm thick plates welded together. All welds are fully welded and the whole assembly is machined after welding to ensure that the profile meets the tooling accuracy requirements. The profile plate 2 and the frame 1 are connected by the connecting pads 3, which allows different models of profile plates 2 to be installed on the frame 1 and makes it easy to install and remove the profile plates 2 from the frame 1. The connecting pads 3 are adjusted according to the shape of different models of profile plates 2 to facilitate the connection between the new profile plates 2 and the frame 1.

[0024] It is important to note that the upper part of the longitudinal partition is provided with a groove for connecting with the transverse partition. The groove size is 225mm×12mm. The lower part of the transverse partition is provided with a connecting groove, the position of which matches the position of the longitudinal partition. The groove size is 239mm×12mm. Both the transverse and longitudinal partitions are provided with rectangular weight-reducing holes, which reduce the overall weight of the tooling while ensuring the overall strength and rigidity of the frame 1.

[0025] Furthermore, the frame 1 is provided with a hanging joint 11 and a lifting square tube 12 for moving and transporting the frame 1 to facilitate demolding.

[0026] Furthermore, the connecting pad 3 includes a right-angle pad 31, which is composed of a horizontal block 311, a vertical block 312, a support block 313, and fastening bolts 314. The horizontal block 311 and the vertical block 312 are fixedly connected. One side of the support block 313 is fixedly connected to the horizontal block 311, and the other side is fixedly connected to the vertical block 312. Multiple fastening bolts 314 are provided, and the fastening bolts 314 are respectively provided on the horizontal block 311 and the vertical block 312.

[0027] Furthermore, the horizontal block 311 is connected to the template 2, and the vertical block 312 is connected to the frame 1.

[0028] Furthermore, the connecting pad 3 also includes a curved pad 32, which is composed of an arc block 321, a connecting block 322 and a fastening bolt 314. The connecting block 322 is fixedly connected to the bottom of the arc block 321, and the fastening bolt 314 is respectively set on the arc block 321 and the connecting block 322.

[0029] Furthermore, the arc-shaped block 321 is connected to the template 2, and the connecting block 322 is connected to the frame 1.

[0030] Furthermore, the bottom frame 1 and the molded plate 2 are connected by connecting pads 3, so that after the small unmanned machine is modified, the bottom frame 1 and the molded plate 2 can be easily disassembled and assembled. The frame 1 can be directly connected to the new molded plate 2, requiring only a small number of connecting pads, which is economical.

[0031] Furthermore, the mold plate 2 is provided with a movable insert 4. During demolding, the fastening bolts 314 are removed, and auxiliary tools such as wedge blocks are used to disengage the movable insert 4 along the width direction. The part is demolded along the height direction to facilitate the demolding of the composite material skin.

[0032] Working principle: First, the mold plate 2 and frame 1 are fixed using connecting pads 3. For flat and curved surfaces, right-angle pads 31 and curved pads 32 are set respectively. One side of the joint is connected to the bottom frame 1 and fixed with fastening bolts 314, and the other side is connected to the mold plate 2. The contact surface matches the inner surface of the mold plate 2. According to the shape of the mold plate 2, various sizes of connecting pads 3 are set. When demolding, the fastening bolts 314 are removed. Using auxiliary tools such as wedge blocks, the movable insert 4 is disengaged along the width direction. Finally, the part is demolded along the height direction.

[0033] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A tooling for forming composite skin for small unmanned aerial vehicles, comprising a frame (1), characterized in that, A template (2) and a connecting pad (3) are installed on the frame (1). The template (2) and the frame (1) are connected by the connecting pad (3). The connecting pad (3) includes a right-angle pad (31). The right-angle pad (31) is composed of a horizontal block (311), a vertical block (312), a support block (313), and fastening bolts (314). The horizontal block (311) and the vertical block (312) are fixedly connected. One side of the support block (313) is fixedly connected to the horizontal block (311), and the other side is fixedly connected to the vertical block (312). There are multiple fastening bolts (314), and the fastening bolts (314) are respectively set on the horizontal block (311) and the vertical block (312). The horizontal block (311) is connected to the template (2), and the vertical block (312) is connected to the frame (1).

2. The composite skin forming tooling for a small unmanned aerial vehicle according to claim 1, characterized in that, The frame (1) is provided with a hanging joint (11) and a lifting square tube (12) for moving and transporting the frame (1).

3. The composite skin forming tooling for a small unmanned aerial vehicle according to claim 1, characterized in that, The connecting pad (3) also includes a curved pad (32), which is composed of an arc block (321), a connecting block (322) and a fastening bolt (314). The connecting block (322) is fixedly connected to the bottom of the arc block (321), and the fastening bolt (314) is respectively set on the arc block (321) and the connecting block (322).

4. The composite skin forming tooling for a small unmanned aerial vehicle according to claim 3, characterized in that, The arc-shaped block (321) is connected to the template (2), and the connecting block (322) is connected to the frame (1).

5. The composite skin forming tooling for a small unmanned aerial vehicle according to claim 1, characterized in that, The template (2) is provided with a movable insert (4), which is connected to the frame (1) through a connecting pad (3).

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