Manufacturing and assembling dual-purpose mold for wood bulkhead structure flutter model

Abstract

The utility model relates to the technical field of flutter models, and provides a manufacturing and assembling dual-purpose mold for a flutter model of a wood bulkhead structure, which comprises a mold main body, the mold main body is provided with an inner molded surface, the inner molded surface is matched with a skin of the flutter model, and the inner molded surface is provided with a plurality of criss-cross limiting grooves. The inner molded surface is provided with limiting grooves, the limiting grooves divide the inner molded surface into a plurality of mounting molded surfaces used for bearing the dimensional boxes, the sizes of the mounting molded surfaces are matched with the overall dimensions of the dimensional boxes, the width of the limiting grooves is equal to the width of gaps between the adjacent dimensional boxes, and limiting plates used for limiting the positions of the dimensional boxes are arranged in the limiting grooves; mounting grooves are formed in the mounting profiles, beam frame positioning blocks used for bearing and supporting the beam frames are arranged in the mounting grooves, and pressing structures used for pressing the beam frame positioning blocks are detachably connected to the beam frame positioning blocks. The mold maintaining box not only can be used for coating the skin, but also is convenient to control the mounting size of the flutter model after being assembled, and can ensure the consistency and coincidence of the skin and the mold maintaining box.

Description

Technical Field

[0001] The utility model relates to the technical field of flutter models, in particular to a dual-purpose mold for manufacturing and assembling a flutter model of a wooden partition frame structure. Background Art

[0002] Flutter is a self-excited vibration phenomenon caused by the interaction of aerodynamic, inertial, and elastic forces when an aircraft moves in airflow. When the flight speed exceeds the flutter speed, the aircraft's structure will be damaged, affecting aircraft safety. Therefore, during aircraft development, based on the requirements of similarity in aerodynamics, structural dynamics, and geometry, a scaled-down flutter model is used in wind tunnels to study the influence of structural parameters on flutter characteristics. This is used to verify the flutter characteristics of designed aircraft and validate theoretical calculation methods.

[0003] In the prior art, flutter models mostly use a wooden frame structure. For example, the applicant provides a dimensional box and a flutter wing wind tunnel model in the patent publication number "CN117606742A". The flutter model includes a supporting beam frame and several dimensional boxes, such as Figure 1 As shown, the dimensional box consists of four side ribs that form a main body with open ends. The skin is bonded to the open ends of the main body. A central rib is also located in the middle of the main body. The tops of the side and central ribs are each provided with a notch for mounting a support beam. The support beam is installed behind the notch, which is then sealed with a sealing plate. Currently, this type of model typically only has a dedicated mold for skin manufacturing, without a corresponding assembly mold, making it difficult to control the installation dimensions of the assembled model. Utility Model Content

[0004] The purpose of the utility model is to provide a dual-purpose mold for manufacturing and assembling a flutter model of a wooden frame structure, so that the skin can be manufactured while ensuring the installation size of the assembled model.

[0005] The utility model is achieved through the following technical solutions:

[0006] A dual-purpose mold for manufacturing and assembling a flutter model of a wooden bulkhead structure includes a mold body, the mold body having an inner profile that matches the skin of the flutter model, and a plurality of crisscrossing limiting grooves that divide the inner profile into a plurality of mounting profiles for carrying dimensional boxes. The sizes of the mounting profiles match the outer dimensions of the dimensional boxes, the width of the limiting grooves is equal to the gap width between adjacent dimensional boxes, and limiting plates are provided in the limiting grooves for limiting the position of the dimensional boxes.

[0007] Several installation profiles are provided with installation grooves, and beam frame positioning blocks for carrying and supporting beam frames are provided in the installation grooves. The beam frame positioning blocks are detachably connected with a clamping structure for clamping them.

[0008] Optionally, the clamping structure includes fastening screws, and the supporting beam and the beam positioning block are connected via the fastening screws.

[0009] Optionally, the clamping structure includes connecting screws and a pressing plate, the positioning block is provided with a beam frame slot for installing the support beam frame, the pressing plate and the positioning block are connected by connecting screws, and the pressing plate presses the support beam frame.

[0010] Optionally, the depth of the beam slot is less than or equal to the thickness of the supporting beam.

[0011] Optionally, when one end of the flutter pattern is flush with the side surface of the inner profile, the side surface of the inner profile is connected to a side baffle for limiting the position of the dimensional box through a fastener.

[0012] Optionally, the height of the limiting plate and the height of the side baffle are smaller than the minimum height of the dimensional box.

[0013] Optionally, the limiting plate is placed in the limiting groove.

[0014] Optionally, the positioning block is bonded to the mold body or connected to the mold body via fasteners.

[0015] Optionally, the inner surface forms a step on the mold body.

[0016] The technical solution of the present invention has at least the following advantages and beneficial effects: in the present invention, the inner surface matches the skin of the flutter model and can be used to apply the skin; the set limit plate can limit the degree of freedom of the dimensional box, and the set positioning block can limit the degree of freedom of the supporting beam, which is convenient for controlling the installation size of the flutter model after assembly, and because the skin application and model assembly are carried out on the same mold body, the consistency and overlap of the skin and the dimensional box can be guaranteed. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying any creative work.

[0018] Figure 1 Schematic diagram of the structure of the mold body (unprocessed state);

[0019] Figure 2 It is a structural diagram of the mold body (processed state);

[0020] Figure 3 This is a schematic diagram of the structure of the mold body (with positioning blocks installed);

[0021] Figure 4 This is a structural diagram of a positioning block in the second compression structure of the present utility model;

[0022] Figure 5 This is a structural diagram of the second compression structure in the present utility model;

[0023] Figure 6 A schematic diagram of the assembly of a dual-purpose mold for manufacturing and assembling a flutter model of a wooden partition frame structure provided by the utility model;

[0024] Figure 7 This is a partial enlarged view of the mold body;

[0025] Figure 8 for Figure 7 Schematic diagram of the structure after assembling the ribs of the dimensional box and installing the limit plates;

[0026] Figure 9 for Figure 8 Schematic diagram of the structure after the support beam is assembled and tightened;

[0027] Figure 10 for Figure 9 Schematic diagram of the structure after the remaining parts of the dimensional box are bonded;

[0028] Icons: 1-mold body, 101-inner surface, 102-limiting groove, 103-mounting surface, 104-mounting groove, 2-positioning block, 201-beam slot, 3-fastening screw, 4-connecting screw, 5-pressure plate, 6-limiting plate, 7-side baffle, 8-dimensional box, 801-side rib, 802-middle rib, 9-support beam. DETAILED DESCRIPTION

[0029] refer to Figure 1 A dual-purpose mold for manufacturing and assembling a flutter model for a wood bulkhead structure includes a mold body 1 having an inner profile 101. Inner profile 101 matches the flutter model's skin. This means that the size and shape of inner profile 101 are consistent with the flutter model's skin. During skin manufacturing, the skin is applied to inner profile 101 and trimmed along the edges of inner profile 101 to the desired flutter model skin size. Furthermore, in this embodiment, inner profile 101 has a step formed on the mold body 1 to facilitate skin application.

[0030] refer to Figure 2The inner surface 101 is provided with a number of crisscross limiting grooves 102 (it should be understood that the application of the skin should be before the limiting grooves 102 are processed). The limiting grooves 102 divide the inner surface 101 into a number of mounting surfaces 103 for carrying the dimensional box 8. The size of the mounting surface 103 matches the outer dimensions of the dimensional box 8. The width of the limiting groove 102 is equal to the gap width between adjacent dimensional boxes 8. A limiting plate 6 for limiting the position of the dimensional box 8 is provided in the limiting groove 102. It should be understood that the width of the limiting plate 6 is also equal to the gap width between adjacent dimensional boxes 8. After the dimensional box 8 is placed on the mounting surface 103, there are limiting plates 6 on all four sides to limit the degree of freedom of the dimensional box 8 (reference Figure 8-Figure 9 ).

[0031] refer to Figure 3 , several mounting surfaces 103 are provided with mounting grooves 104, and the mounting grooves 104 are provided with beam positioning blocks 2 for carrying the support beam 9. The beam positioning blocks 2 are detachably connected with a clamping structure for clamping them. This arrangement facilitates limiting the degree of freedom of the support beam 9.

[0032] It can be seen that the mold provided in this application can not only be used to apply the skin, but also can limit the degrees of freedom of the dimensional box 8 and the supporting beam 9 when assembling the flutter model, so as to facilitate the control of the installation size of the flutter model after assembly. Moreover, since the skin application and model assembly are carried out on the same mold body 1, the consistency and overlap of the skin and the dimensional box 8 can be guaranteed.

[0033] There is no limit to the number of positioning blocks 2, and the number can be more or less as long as it can define the full degree of freedom of the support beam 9. There is no limit to the fixing method of the positioning blocks 2, as long as they can be relatively fixed to the mold body 1. For example, the positioning blocks 2 can be bonded to the mold body 1 or connected with fasteners (such as screws).

[0034] In this embodiment, two types of compression structures are provided. The first compression structure (refer to Figure 9 and Figure 10 ) includes a fastening screw 3, the support beam 9 and the beam positioning block 2 are connected by the fastening screw 3, that is, a through hole is preset on the support beam 9, and a threaded hole is set on the mold body 1. After the support beam 9 is installed, the fastening screw 3 is connected to limit the freedom of the support beam 9.

[0035] The second compression structure (reference Figure 4 and Figure 5) includes connecting screws 4 and a pressing plate 5. The positioning block 2 is provided with a beam retaining groove 201 for mounting the support beam 9. The pressing plate 5 is connected to the positioning block 2 via the connecting screws 4, and the pressing plate 5 compresses the support beam 9. That is, at least two through holes are provided on the pressing plate 5, and corresponding threaded holes are provided on the mold body 1. After the support beam 9 is installed in the beam retaining groove 201, the pressing plate 5 is connected via the connecting screws 4 to compress the support beam 9. Furthermore, the depth of the beam retaining groove 201 is less than or equal to the thickness of the support beam 9, ensuring that the support beam 9 can be compressed.

[0036] It is easy to understand that in actual application, only the first clamping structure or the second clamping structure can be used to limit the degree of freedom of the support beam 9. Of course, the two clamping structures can also be used in combination. It should be understood that for different clamping structures, the structure of the positioning block 2 is also different.

[0037] refer to Figure 6 (It should be noted that, in this figure, for ease of observation, the height of the limit plate 6 and the side baffle 7 are shown to be higher than the dimensional box 8; and only part of the limit plate 6 is shown). When one end of the flutter model is flush with the side of the inner surface 101, the side of the inner surface 101 is connected to the side baffle 7 for limiting the position of the dimensional box 8 through a fastener (such as a screw). It is easy to understand that the side baffle 7 acts as the limit plate 6, that is, it limits the degree of freedom of the dimensional box 8.

[0038] In this embodiment, the limit plate 6 is placed in the limit groove 102 for quick removal. Further, the height of the limit plate 6 and the height of the side baffle 7 are less than the minimum height of the dimensional box 8, which is convenient for applying the skin after assembly.

[0039] Based on the above, the assembly process of the flutter model is as follows:

[0040] S1. Assemble the side ribs 801 and the middle ribs 802 of each dimensional box 8 (usually, adjacent side ribs 801 and the side ribs 801 and the middle ribs 802 are connected by mortise and tenon structures), and place them on the corresponding mounting surface 103 of the mold body 1;

[0041] S2. After the dimensional box 8 is correctly placed, the limiting plate 6 is inserted into the limiting groove 102 so that each dimensional box 8 has a limiting plate 6 on all four sides; at the same time, the side baffle 7 is connected, and the limiting plate 6 and the side baffle 7 jointly limit the degree of freedom of each dimensional box 8 (reference Figure 7 and Figure 8 );

[0042] S3, install the support beam 9, the support beam 9 is supported by the positioning block 2, and is fixed by the compression structure to limit its freedom (refer to Figure 9 );

[0043] S4, after confirming that the gap and relative position between the dimensional box 8 and the supporting beam 9 are correct, glue the remaining part of the dimensional box 8 (refer to Figure 10 );

[0044] S5, bonding the model skin and trimming the skin according to the boundary line of the upper limit groove 102 on the mold body 1;

[0045] S6. Take out the limiting plate 6 and remove the flutter model from the mold body 1. The assembly is completed.

[0046] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Those skilled in the art will readily appreciate that the present invention is susceptible to various modifications and variations. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A dual-purpose mold for manufacturing and assembling a flutter model of a wooden frame structure, characterized in that: The invention comprises a mold body (1), wherein the mold body (1) is provided with an inner profile (101), the inner profile (101) matches the skin of the flutter model, the inner profile (101) is provided with a plurality of crisscross limiting grooves (102), the limiting grooves (102) divide the inner profile (101) into a plurality of mounting profiles (103) for carrying dimensional boxes (8), and the size of the mounting profiles (103) matches the outer dimensions of the dimensional boxes (8), the width of the limiting grooves (102) is equal to the gap width between adjacent dimensional boxes (8), and a limiting plate (6) for limiting the position of the dimensional boxes (8) is provided in the limiting grooves (102); Several mounting profiles (103) are provided with mounting grooves (104), and beam frame positioning blocks (2) for carrying and supporting beam frames (9) are provided in the mounting grooves (104). A pressing structure for pressing the beam frame positioning blocks (2) is detachably connected to the beam frame positioning blocks (2).

2. The dual-purpose mold for manufacturing and assembling a flutter model of a wooden bulkhead structure according to claim 1 is characterized in that: The clamping structure comprises a fastening screw (3), and the supporting beam (9) and the beam positioning block (2) are connected via the fastening screw (3).

3. The dual-purpose mold for manufacturing and assembling a flutter model of a wooden bulkhead structure according to claim 1, characterized in that: The pressing structure comprises connecting screws (4) and a pressing plate (5); a beam frame slot (201) for mounting a supporting beam frame (9) is provided on the positioning block (2); the pressing plate (5) is connected to the positioning block (2) via the connecting screws (4), and the pressing plate (5) presses the supporting beam frame (9).

4. The dual-purpose mold for manufacturing and assembling a flutter model of a wooden bulkhead structure according to claim 3 is characterized in that: The depth of the beam frame slot (201) is less than or equal to the thickness of the supporting beam frame (9).

5. The dual-purpose mold for manufacturing and assembling a flutter model of a wooden bulkhead structure according to claim 1, characterized in that: When one end of the flutter pattern is flush with the side surface of the inner profile (101), the side surface of the inner profile (101) is connected to the side baffle (7) for limiting the position of the dimensional box (8) through a fastener.

6. The dual-purpose mold for manufacturing and assembling a flutter model of a wooden bulkhead structure according to claim 5, characterized in that: The height of the limiting plate (6) and the height of the side baffle (7) are smaller than the minimum height of the dimensional box (8).

7. The dual-purpose mold for manufacturing and assembling a flutter model for a wooden bulkhead structure according to any one of claims 1 to 6, characterized in that: The limiting plate (6) is placed in the limiting groove (102).

8. The dual-purpose mold for manufacturing and assembling a flutter model of a wooden bulkhead structure according to any one of claims 1 to 6, characterized in that: The positioning block (2) is bonded to the mold body (1) or connected via fasteners.

9. The dual-purpose mold for manufacturing and assembling a flutter model of a wooden bulkhead structure according to any one of claims 1 to 6, characterized in that: The inner mold surface (101) is formed with a step on the mold body (1).

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