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

Abstract

The invention 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 can be used for coating the skin, the mounting size of the flutter model after assembly can be conveniently controlled, and the consistency and coincidence of the skin and the mold maintaining box can be guaranteed.

Description

Technical Field

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

[0002] Flutter is a self-excited vibration phenomenon caused by the interaction of aerodynamic force, inertial force and elastic force when the aircraft moves in the airflow. When the flight speed exceeds the flutter speed, the structure of the aircraft will be damaged, thus affecting the safety of the aircraft. Therefore, in the process of aircraft development, according to the requirements of similarity in aerodynamics, structural dynamics and geometric shape, a scaled flutter model is used in the wind tunnel to study the influence of structural parameters on flutter characteristics, check the flutter characteristics of the designed aircraft and verify the theoretical calculation method.

[0003] In the prior art, flutter models are mostly made of wooden frame structures. 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 a plurality of dimensional boxes, such as Figure 1 As shown, the dimensional box is surrounded by four side ribs to form a box body with open ends. The skin is glued to the open part of the box body. There is also an intermediate rib in the middle of the box body. The tops of the side ribs and the intermediate ribs are both provided with notches for installing support beams. The support beams are installed behind the notches, and the notches are closed by sealing plates. At present, this type of model usually only has a special mold for skin manufacturing, and there is no corresponding assembly mold, which makes it difficult to control the installation size of the assembled model. Summary of the invention

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

[0005] The present invention is achieved through the following technical solutions:

[0006] A dual-purpose mold for manufacturing and assembling a flutter model of a wood bulkhead structure, comprising a mold body, the mold body is provided with an inner profile, the inner profile matches the skin of the flutter model, the inner profile is provided with a plurality of crisscrossing limiting grooves, the limiting grooves divide the inner profile into a plurality of mounting profiles for carrying a dimensional box, and the size of the mounting profile matches the outer dimensions of the dimensional box, the width of the limiting groove is equal to the gap width between adjacent dimensional boxes, and a limiting plate for limiting the position of the dimensional box is provided in the limiting groove;

[0007] A plurality of installation profiles are provided with installation grooves, and beam frame positioning blocks for bearing and supporting beam frames are provided in the installation grooves. A clamping structure for clamping the beam frame is detachably connected to the beam frame positioning blocks.

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

[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 supporting beam frame, the pressing plate and the positioning block are connected by connecting screws, and the pressing plate presses the supporting beam frame.

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

[0011] Optionally, when one end of the flutter pattern is flush with one side of the inner profile, the side 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 limit baffle 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 a fastener.

[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 drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0018] Figure 1 It is a structural schematic diagram of the mold body (unprocessed state);

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

[0020] Figure 3 It is a structural diagram of the mold body (with positioning blocks installed);

[0021] Figure 4 It is a structural schematic diagram of a positioning block in the second clamping structure of the present invention;

[0022] Figure 5 It is a structural schematic diagram of the second pressing structure in the present invention;

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

[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 the ribs of the dimensional box are assembled and the limit plates are installed;

[0026] Fig. 9 for Figure 8 Schematic diagram of the structure after the supporting beam frame is assembled and pressed;

[0027] Fig.10 for Fig. 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 of a wood bulkhead structure includes a mold body 1, and the mold body 1 is provided with an inner profile 101, and the inner profile 101 matches the skin of the flutter model. It should be understood that the size and shape of the inner profile 101 are consistent with the skin of the flutter model. When manufacturing the skin, the skin is laid on the inner profile 101, and the skin size of the flutter model is obtained after cutting along the edge of the inner profile 101. Further, in this embodiment, the inner profile 101 is formed with a step on the mold body 1 to facilitate the laying of the skin.

[0030] refer to Figure 2The inner profile 101 is provided with a plurality of criss-cross 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 profile 101 into a plurality of mounting profiles 103 for carrying the dimensional box 8, the size of the mounting profile 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, and 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 profile 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 A plurality of mounting surfaces 103 are provided with mounting grooves 104, and a beam positioning block 2 for carrying the supporting beam 9 is provided in the mounting groove 104. A clamping structure for clamping the beam positioning block 2 is detachably connected to the beam positioning block 2. This arrangement facilitates limiting the degree of freedom of the supporting beam 9.

[0032] It can be seen that the mold provided in the present 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 dimensions of the flutter model after assembly, and because 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 on the basis of being able to limit the full degree of freedom of the supporting beam frame 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 are bonded to the mold body 1 or connected by fasteners (such as screws).

[0034] In this embodiment, two types of compression structures are provided. The first compression structure (see Fig. 9 and Fig.10 ) includes a fastening screw 3, and the support beam 9 is connected to the beam positioning block 2 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 clamping structure (reference Figure 4 and Figure 5) includes connecting screws 4 and a pressing plate 5, a beam frame slot 201 for installing the support beam frame 9 is provided on the positioning block 2, the pressing plate 5 is connected to the positioning block 2 by the connecting screws 4, and the pressing plate 5 presses the support beam frame 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 frame 9 is installed in the beam frame slot 201, the pressing plate 5 is connected by the connecting screws 4 to press the support beam frame 9. Furthermore, the depth of the beam frame slot 201 is less than or equal to the thickness of the support beam frame 9, so as to ensure that the support beam frame 9 can be pressed.

[0036] It is easy to understand that in practical applications, 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 the sake of convenience of observation, the height of the limit plate 6 and the side baffle plate 7 are shown to be higher than the dimensional box 8; and only a portion of the limit plate 6 is shown). When one end of the flutter model is flush with one side of the inner surface 101, the side surface of the inner surface 101 is connected to the side baffle plate 7 for limiting the position of the dimensional box 8 through fasteners (such as screws). It is easy to understand that the side baffle plate 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 baffle plate and the height of the side baffle plate 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, assembling 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 placing them on the corresponding mounting surface 103 on 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 clamping structure to limit its freedom (refer to Fig. 9 );

[0043] S4. After confirming that the gap and relative position between the dimensional box 8 and the supporting beam 9 are correct, the remaining part of the dimensional box 8 is bonded (refer to Fig.10 );

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

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

[0046] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope 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 mold body (1) comprises an inner mold surface (101), the inner mold surface (101) matches the skin of the flutter model, the inner mold surface (101) is provided with a plurality of crisscrossing limiting grooves (102), the limiting grooves (102) divide the inner mold surface (101) into a plurality of mounting mold surfaces (103) for carrying a dimensional box (8), and the size of the mounting mold 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), and a limiting plate (6) for limiting the position of the dimensional box (8) is provided in the limiting groove (102); A plurality of installation profiles (103) are provided with installation grooves (104), and a beam frame positioning block (2) for bearing a supporting beam frame (9) is provided in the installation grooves (104). A clamping structure for clamping the beam frame (9) is detachably connected to the beam frame positioning block (2).

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

3. The dual-purpose mold for manufacturing and assembling the flutter model of the wooden frame structure according to claim 1 is characterized in that: The clamping structure comprises connecting screws (4) and a pressing plate (5); a beam frame clamping groove (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 the flutter model of the wooden frame 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 the flutter model of the wooden frame structure according to claim 1 is characterized in that: When one end of the flutter pattern is flush with one side of the inner profile (101), the side of the inner profile (101) is connected to a side baffle (7) for limiting the position of the dimensional box (8) through a fastener.

6. The dual-purpose mold for manufacturing and assembling the flutter model of the wooden frame structure according to claim 5 is characterized in that: The height of the limit baffle and the height of the side baffle (7) are less than the minimum height of the dimensional box (8).

7. The dual-purpose mold for manufacturing and assembling a flutter model of a wood frame 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 wood frame 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 wood 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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