Variable pre-forming mold

Abstract

The utility model discloses a variable pre-forming die which comprises a corner module, a first connecting part and a second connecting part, the corner module comprises a plurality of corner modules, the corner modules are in an arc-shaped bent plate shape, the curvature radiuses of the corner modules are the same, and the two ends of the corner modules are provided with the first connecting part and the second connecting part respectively. The first connecting part and the second connecting part are of detachable connecting structures which are matched with each other; the straight plate module comprises at least two straight plate modules, each straight plate module is in a strip-shaped straight plate shape, the first connecting part and the second connecting part are arranged at the two ends of each straight plate module respectively, and the corner modules are detachably connected between every two adjacent straight plate modules in sequence. By selecting the multiple corner modules and the straight plate modules to be combined and installed, the variable pre-forming mold with the set arc angle can be obtained, and therefore different use and production requirements can be met in time, and a large amount of time, material resources and financial resources can be saved. The utility model belongs to the field of design and manufacturing of composite material preforming molds.

Description

Technical Field

[0001] This utility model relates to the field of design and manufacturing technology of composite material preforming molds, specifically a variable preforming mold. Background Technology

[0002] Aerospace vehicles face a variety of complex environmental conditions and are subjected to diverse external loads during operation. The overall structural design of aerospace vehicles must consider numerous factors, especially aerodynamic requirements; therefore, aircraft fuselages and wings utilize a large number of panel structures. To effectively connect these panel structures and prevent their instability under complex load conditions during service, which could severely impact the safety of the aerospace vehicle, L-shaped mechanically connected composite material structures are widely used in fuselage frame stringers, stiffening plate structures, wing spars, and rib arches. L-shaped components bear complex stress environments. A new type of integrally molded L-shaped component features a tangentially rounded transition at the corners. This rounded structure effectively disperses internal stress, improving the strength and stability of the L-shaped component, while its smooth surface better meets aerodynamic requirements.

[0003] Currently, composite L-shaped components are mainly produced through molding methods such as thermal insulation film forming and manual laying. However, existing L-shaped molds are all single-fixed-angle structures, which can only form components of a single structural size. For the application of composite L-shaped panels in different fields, they need to be made into structures with different angles to meet different usage requirements. Composite L-shaped panels with different angles cannot be produced using the same set of molds. Designing and manufacturing dedicated molds according to different angle requirements would waste a lot of time, resources, and money. Utility Model Content

[0004] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention provides a variable preforming mold, which solves the problem that L-shaped plates of composite materials with various arc angles cannot be produced using the same set of molds, and that designing and manufacturing special molds according to different angle requirements would waste a lot of time, material resources and financial resources.

[0005] According to a first aspect of the present invention, a variable preforming mold includes:

[0006] The corner module includes multiple corner modules, each corner module being an arc-shaped curved plate. The multiple corner modules have the same radius of curvature. Each corner module has a first connecting part and a second connecting part at its two ends. The first connecting part and the second connecting part are configured as mutually matching detachable connection structures.

[0007] A straight panel module includes at least two straight panel modules, each straight panel module being a strip-shaped straight panel. The two ends of each straight panel module are respectively provided with a first connecting part and a second connecting part, wherein a plurality of corner modules are detachably connected between two adjacent straight panel modules.

[0008] The variable preforming mold according to the embodiments of the present invention has at least the following beneficial effects:

[0009] This invention obtains a mold by combining several corner modules with at least two straight plate modules from a corner module assembly. Based on the arc angle of the composite material L-shaped plate, several corner modules are selected and straight plate modules are sequentially connected on both sides to obtain a variable preform mold with different arc angles. Since the preform mold is detachably connected through a quick-release structure, the corner modules can be quickly and flexibly combined according to the composite material L-shaped plates with different arc angles, thereby meeting different usage and production needs in an instant. It has the characteristics of modularity, reusability, and easy replacement, and can save a lot of time, material resources, and financial resources in production.

[0010] According to some embodiments of the present invention, the corner module includes at least one first corner module, which is an arc-shaped curved plate with a corresponding central angle of 15°.

[0011] According to some embodiments of the present invention, the corner module includes at least one second corner module, wherein the second corner module is an arc-shaped curved plate with a corresponding central angle of 30°.

[0012] According to some embodiments of the present invention, the corner module includes at least one third corner module, which is an arc-shaped curved plate with a corresponding central angle of 45°.

[0013] According to some embodiments of the present invention, the corner module includes at least one fourth corner module, which is an arc-shaped curved plate with a corresponding central angle of 90°.

[0014] According to some embodiments of this utility model, the centers of several corner modules between two straight-plate modules are concentrically arranged.

[0015] According to some embodiments of the present invention, the first connecting part is a slot structure, the second connecting part is a block structure, and the block structure and the slot structure are detachably connected.

[0016] According to some embodiments of the present invention, the slot structure extends along a direction perpendicular to the length of the variable preform mold, the cross-section of the slot structure is an isosceles trapezoidal slot, and the cross-section of the block structure is an isosceles trapezoidal block that matches and engages with the slot structure.

[0017] According to some embodiments of the present invention, the extending direction of the slot structure is perpendicular to the radial direction of the corner module.

[0018] According to some embodiments of this utility model, the surfaces of the corner module and the straight plate module are provided with a non-stick coating.

[0019] Other features and advantages of this invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention. Attached Figure Description

[0020] The present invention will be further described below with reference to the accompanying drawings and embodiments, wherein:

[0021] Figure 1 A schematic diagram of the corner module of one embodiment of the variable preforming mold provided by this utility model;

[0022] Figure 2 A schematic diagram of the structure of a straight plate module of one embodiment of the variable preforming mold provided by this utility model;

[0023] Figure 3 A partial enlarged view of the first connecting portion of an embodiment of the variable preforming mold provided by this utility model;

[0024] Figure 4 A partial enlarged view of the second connecting portion of an embodiment of the variable preforming mold provided by this utility model;

[0025] Figure 5 A schematic diagram of the splicing of an embodiment of the variable preforming mold provided by this utility model at an included angle of 90°;

[0026] Figure 6 A schematic diagram of the splicing of an embodiment of the variable preforming mold provided by this utility model at an included angle of 30°.

[0027] Icon labels:

[0028] Corner module 100;

[0029] First corner module 110; Second corner module 120; Third corner module 130; Fourth corner module 140; Corner structure 150;

[0030] Straight module 200;

[0031] Straight panel module 210; First straight panel module 211; Second straight panel module 212;

[0032] First connecting part 310; second connecting part 320. Detailed Implementation

[0033] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0034] In the description of this utility model, it should be understood that the orientation descriptions, such as up, down, etc., are based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0035] In the description of this utility model, "multiple" refers to two or more. The use of "first" and "second" is for distinguishing technical features only and should not be construed as indicating or implying relative importance, or implicitly indicating the number of technical features or their sequential relationship.

[0036] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0037] The technical solution of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described below are some embodiments of this utility model, not all embodiments.

[0038] Aerospace vehicles face a variety of complex environmental conditions and are subjected to diverse external loads during operation. The overall structural design of aerospace vehicles must consider numerous factors, especially aerodynamic requirements; therefore, aircraft fuselages and wings utilize a large number of panel structures. To effectively connect these panel structures and prevent their instability under complex load conditions during service, which could severely impact the safety of the aerospace vehicle, L-shaped mechanically connected composite material structures are widely used in fuselage frame stringers, stiffening plate structures, wing spars, and rib arches. L-shaped components bear complex stress environments. A new type of integrally molded L-shaped component features a tangentially rounded transition at the corners. This rounded structure effectively disperses internal stress, improving the strength and stability of the L-shaped component, while its smooth surface better meets aerodynamic requirements.

[0039] Currently, composite L-shaped components are mainly produced through molding methods such as thermal insulation film forming and manual laying. However, existing L-shaped molds are all single-fixed-angle structures, which can only form components of a single structural size. For the application of composite L-shaped panels in different fields, they need to be made into structures with different angles to meet different usage requirements. Composite L-shaped panels with different angles cannot be produced using the same set of molds. Designing and manufacturing dedicated molds according to different angle requirements would waste a lot of time, resources, and money.

[0040] Furthermore, this utility model embodiment proposes a variable preforming mold, which can effectively solve the problem that L-shaped plates of composite materials with different arc angles cannot be produced using the same set of molds, and that designing and manufacturing special molds according to different angle requirements would waste a lot of time, material resources and financial resources.

[0041] refer to Figure 1 , Figure 2 , Figure 3 and Figure 4 The variable preforming mold of this utility model is illustrated in the following embodiments:

[0042] The variable preforming mold of this utility model embodiment includes: a corner module 100 and a straight plate module 200.

[0043] The corner module 100 includes multiple corner modules, which are arc-shaped curved plates. Each corner module has the same radius of curvature. The radius of curvature is a measure of the degree of curvature of a curve. For a circular arc, the radius of curvature is the radius corresponding to the circular arc. Thus, each corner module can meet the requirement of smooth connection without corners, avoiding stress concentration in the manufactured L-shaped structure.

[0044] The corner module can be an arc-shaped curved plate of different lengths. Depending on the arc curvature of the L-shaped structure, different corner modules can be selected and connected in sequence to form corner structures with different arc angles. Alternatively, the corner structures can be connected and combined using corner modules of the same length.

[0045] To improve the flexibility of the combination, the corner module 100 in this embodiment includes: a first corner module 110, a second corner module 120, a third corner module 130, and a fourth corner module 140. There are multiple first corner modules 110, second corner modules 120, third corner modules 130, and fourth corner modules 140. The lengths of the first corner modules 110, second corner modules 120, third corner modules 130, and fourth corner modules 140 are all different, and they can be selected and combined according to different needs.

[0046] Regarding the length limitation of the corner modules, this embodiment limits it based on the central angle corresponding to the arc of the corner module, thus defining corner modules of different lengths. The central angle corresponding to the arc of the first corner module 110 is 15°, the central angle corresponding to the arc of the second corner module 120 is 30°, the central angle corresponding to the arc of the third corner module 130 is 45°, and the central angle corresponding to the arc of the fourth corner module 140 is 90°. The angle of the central angle corresponding to the arc of the corner module in this embodiment is selected according to the commonly used included angle of L-shaped plates. In other embodiments, other central angles can also be selected for the corner modules, as long as the application needs are met.

[0047] Furthermore, in this embodiment, the corner module is provided with a first connecting part 310 and a second connecting part 320 at both ends. The first connecting part 310 and the second connecting part 320 are configured as mutually matching detachable connection structures. Adjacent corner modules can be detachably connected through the first connecting part 310 and the second connecting part 320, thereby achieving flexible splicing. Several corner modules are connected end to end in sequence to obtain corner structures with different arc angles.

[0048] The straight panel module in this embodiment includes at least two straight panel modules. The number of straight panel modules can be adjusted according to the needs of the usage scenario. The straight panel module is strip-shaped and the width of the straight panel module and the corner module are the same, which can achieve seamless connection between the two edges.

[0049] Furthermore, in this embodiment, the two ends of the straight plate module are respectively provided with a first connecting part 310 and a second connecting part 320. The first connecting part 310 and the second connecting part 320 are configured as mutually matching detachable connection structures. Several straight plate modules are detachably connected through the first connecting part and the second connecting part. Two adjacent straight plate modules 200 are connected through the aforementioned corner structure to form an L-shaped mold. The two straight plate modules are designated as the first straight plate module and the second straight plate module. The two ends of the corner structure are also detachably connected to the first straight plate module and the second straight plate module through the first connecting part 310 and the second connecting part 320.

[0050] Regarding the detachable connection structure between the first connecting part 310 and the second connecting part 320, in this embodiment, a quick-release connection is achieved through a matching slot structure and a block structure. The structure is simple and not easily worn. In other embodiments, quick-release connections can be achieved through other means, such as magnetic structures, snap-fit ​​structures, etc.

[0051] Specifically, such as Figure 3As shown, the first connecting part 310 is a slot structure that extends along a direction perpendicular to the length of the variable preforming mold. The cross-section of the slot structure is an isosceles trapezoidal groove. The isosceles trapezoid restricts the movement of the module along the length of the variable preforming mold, preventing loosening and improving the tightness of the connection. Furthermore, the extending direction of the slot structure is perpendicular to the radial direction of the variable preforming module, restricting the movement of the module in the radial direction of the variable preforming mold and playing an effective fixing role. The second connecting part 320 is a locking block structure, such as... Figure 4 As shown, the cross-section of the card block structure is an isosceles trapezoidal block that matches and engages with the card slot structure. During installation, it is inserted into the card slot structure along the extension direction of the card slot structure to achieve connection and fixation between modules. In some other embodiments, the card slot structure and the buckle structure can be in other shapes, as long as they can match each other and restrict the relative movement between the connected modules.

[0052] Furthermore, both the straight and corner modules have a non-stick coating on their surfaces to facilitate the separation of the molded composite material parts from the mold. The non-stick coating can be made of non-stick materials such as polyethersulfone coating, nano-ceramics, polytetrafluoroethylene, silicone rubber, fluororubber, and polyurethane.

[0053] Based on geometric calculations, it is easy to know that the angle of the variable preform mold, that is, the included angle between the two straight modules 200, is complementary to the sum of the corresponding central angles of several corner modules.

[0054] Regarding the usage of the variable preform mold in this embodiment:

[0055] refer to Figure 5 In use case 1, the arc angle required for the variable preforming mold is 90°. One straight plate module is selected for each of the two straight plate modules 200. The two straight plate modules 200 are connected by a corner module 100. The sum of the corresponding central angles of the selected corner modules is 180°-90°=90°. Therefore, a fourth corner module 140 with a central angle of 90° is selected as the corner module 100. The first straight plate module 210, the corner module 100 and the second straight plate module 220 are connected end to end through the first connecting part 310 and the second connecting part 320 to obtain a variable preforming mold with an arc angle of 90°.

[0056] refer to Figure 6In use case 2, the arc angle required for the variable preforming mold is 30°. Each of the two straight plate modules 200 selects one straight plate module, and the two straight plate modules 200 are connected by a corner module 100. The sum of the corresponding central angles of the selected corner modules is 180°-30°=150°. Therefore, a fourth corner module 140 with a central angle of 90°, a third corner module 130 with a central angle of 45°, and a first corner module 110 with a central angle of 15° are selected. The corresponding central angle of the corner module 100 is 90°+45°+15°=150°, which meets the condition. The first straight plate module 210, the corner module 100, and the second straight plate module 220 are connected end to end through the first connecting part 310 and the second connecting part 320 to obtain a variable preforming mold with an arc angle of 45°.

[0057] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0058] The embodiments of the present utility model have been described in detail above with reference to the accompanying drawings. However, the present utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present utility model.

Claims

1. A variable preforming mold, characterized in that, include: A corner module includes multiple corner modules, each corner module being an arc-shaped curved plate. The multiple corner modules have the same radius of curvature. Each corner module has a first connecting part and a second connecting part at its two ends. The first connecting part and the second connecting part are configured as mutually matching detachable connection structures. A straight panel module includes at least two straight panel modules, each straight panel module being a strip-shaped straight panel. The two ends of each straight panel module are respectively provided with a first connecting part and a second connecting part, wherein a plurality of corner modules are detachably connected between two adjacent straight panel modules.

2. The variable preforming mold according to claim 1, characterized in that: The corner module includes at least one first corner module, which is an arc-shaped curved plate with a corresponding central angle of 15°.

3. The variable preforming mold according to claim 1, characterized in that: The corner module includes at least one second corner module, which is an arc-shaped curved plate with a corresponding central angle of 30°.

4. The variable preforming mold according to claim 1, characterized in that: The corner module includes at least one third corner module, which is an arc-shaped curved plate with a corresponding central angle of 45°.

5. The variable preforming mold according to claim 1, characterized in that: The corner module includes at least one fourth corner module, which is an arc-shaped curved plate with a corresponding central angle of 90°.

6. The variable preforming mold according to any one of claims 1 to 5, characterized in that: The centers of the several corner modules connected between the two straight modules are set concentrically.

7. The variable preforming mold according to claim 1, characterized in that: The first connecting part is a slot structure, and the second connecting part is a block structure. The block structure and the slot structure can be detachably connected.

8. The variable preforming mold according to claim 7, characterized in that: The slot structure extends along a direction perpendicular to the length of the variable preform mold, and the cross-section of the slot structure is an isosceles trapezoidal slot. The cross-section of the block structure is an isosceles trapezoidal block that matches and engages with the slot structure.

9. The variable preforming mold according to claim 8, characterized in that: The extension direction of the slot structure is perpendicular to the radial direction of the corner module.

10. The variable preforming mold according to claim 1, characterized in that: Both the corner module and the straight plate module have a non-stick coating on their surfaces.

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