CN-117227221-B - Wing connecting piece mould structure and wing connecting piece manufacturing method

CN117227221BCN 117227221 BCN117227221 BCN 117227221BCN-117227221-B

Abstract

The invention provides a wing connecting piece mould structure and a wing connecting piece manufacturing method, wherein the wing connecting piece mould structure comprises a mould base, a foam sandwich layer, side mould components, a first upper pressing plate, a second upper pressing plate, a third upper pressing plate, a fourth upper pressing plate, a lower pressing plate component, a main beam, an auxiliary beam and a plurality of side loose cores; the foam sandwich layer is arranged in the mold base, the first upper pressing plate, the second upper pressing plate, the third upper pressing plate, the fourth upper pressing plate and the lower pressing plate are all arranged in the foam sandwich layer, the main beam and the auxiliary beam penetrate through the mold base, and the side core pulling is detachably arranged on the foam sandwich layer. The invention provides a reasonable connecting piece die structure, which can be used for manufacturing a carbon fiber composite material connecting piece between a transition section and an upper reverse section of an unmanned aerial vehicle wing, and can improve the preparation precision of the carbon fiber composite material connecting piece, reduce the preparation cost, realize the effect of reducing the weight of a finished product and finally meet the design requirements of the integral strength and precision of the wing.

Inventors

PENG XIONGQI
LI YUEJUN
YU TIANYU
LIU PEIYAN
YIN HONGLING
HUANG CHAO

Assignees

上海交通大学
中国兵器工业导航与控制技术研究所

Dates

Publication Date: 20260512
Application Date: 20230925

Claims (7)

1. The wing connecting piece die structure is characterized by comprising a die base (1), a foam sandwich layer, side die assemblies, a first upper pressing plate (7), a second upper pressing plate (8), a third upper pressing plate (9), a fourth upper pressing plate (10), a lower pressing plate assembly, a main beam (20), an auxiliary beam (21) and a plurality of side core pulling cores (19); The side die assembly is arranged at the top end of the die base (1), the foam sandwich layer is arranged in the die base (1), the first upper pressing plate (7), the second upper pressing plate (8), the third upper pressing plate (9), the fourth upper pressing plate (10) and the lower pressing plate assembly are all arranged in the foam sandwich layer, The main beam (20) and the auxiliary beam (21) penetrate through the die base (1), and the side core pulling (19) is detachably arranged on the foam sandwich layer; the foam sandwich layer comprises a first transverse foam (22), a second transverse foam (23), a third transverse foam (24), a first vertical foam (25), a second vertical foam (26), a third vertical foam (27) and a fourth vertical foam (28); the second transverse foam (23) is arranged between the first transverse foam (22) and the third transverse foam (24), and a first vertical foam (25) is arranged between one end of the first transverse foam (22) and one end of the second transverse foam (23); A third vertical foam (27) is arranged between the other end of the first transverse foam (22) and the other end of the second transverse foam (23); a second vertical foam (26) is arranged between one end of the third transverse foam (24) and one end of the second transverse foam (23), and a fourth vertical foam (28) is arranged between the other end of the third transverse foam (24) and the other end of the second transverse foam (23); the first transverse foam (22), the second transverse foam (23) and the third transverse foam (24) are respectively provided with a side core-pulling through hole (29) for accommodating the side core-pulling (19) and a first hole structure (30) for allowing the main beam (20) or the auxiliary beam (21) to pass through.
2. The wing connector mould structure according to claim 1, wherein the side mould assembly comprises a first side mould (2), a second side mould (3), a third side mould (4), a fourth side mould (5) and a fifth side mould (6); The first side die (2) and the second side die (3) are respectively arranged at two ends of the die base (1); One end of a third side die (4), one end of a fourth side die (5) and one end of a fifth side die (6) are all arranged on the second side die (3), the other end of the third side die (4), the other end of the fourth side die (5) and the other end of the fifth side die (6) are all arranged on the first side die (2), and the third side die (4), the fourth side die (5) and the fifth side die (6) are arranged in parallel.
3. The wing connector mold structure of claim 2, wherein, The first upper pressing plate (7), the second upper pressing plate (8) and the fourth upper pressing plate (10) are provided with side core-pulling through holes (29), a first hollow structure (31) and a second hollow structure (32) for accommodating side core-pulling holes (19); The third upper pressing plate (9) is provided with a first hollow structure (31) and a second hollow structure (32) The first transverse foam (22) is positioned between the first upper pressing plate (7) and the inner wall of the die base (1); the third transverse foam (24) is positioned between the fourth upper pressing plate (10) and the inner wall of the die base (1); The second upper pressing plate (8) and the third upper pressing plate (9) are respectively positioned at two sides of the second transverse foam (23).
4. A wing connector mould structure according to claim 3, wherein the lower platen assembly comprises a first lower platen (11), a second lower platen (12), a third lower platen (13), a fourth lower platen (14), a fifth lower platen (15), a sixth lower platen (16), a seventh lower platen (17) and an eighth lower platen (18); the first lower pressing plate (11), the second lower pressing plate (12), the third lower pressing plate (13) and the fourth lower pressing plate (14) are provided with first matching grooves (33); The fifth lower pressing plate (15), the sixth lower pressing plate (16), the seventh lower pressing plate (17) and the eighth lower pressing plate (18) are provided with second matching grooves (34); The first lower pressing plate (11), the second lower pressing plate (12), the third lower pressing plate (13) and the fourth lower pressing plate (14) are respectively matched with first hollow structures (31) on the first upper pressing plate (7), the second upper pressing plate (8), the third upper pressing plate (9) and the fourth upper pressing plate (10), the first matching groove (33) and the first hollow structures (31) form a second hole structure, and the second hole structure allows the auxiliary beam (21) to pass through; The fifth lower pressing plate (15), the sixth lower pressing plate (16), the seventh lower pressing plate (17) and the eighth lower pressing plate (18) are respectively matched with second hollow structures (32) on the first upper pressing plate (7), the second upper pressing plate (8), the third upper pressing plate (9) and the fourth upper pressing plate (10), the second matching groove (34) and the second hollow structures (32) form a third hole structure, and the third hole structure allows the main beam (20) to pass through.
5. The wing connector mold structure according to claim 1, wherein the number of side core-pulling through holes (29) on the first lateral foam (22), the number of side core-pulling through holes (29) on the second lateral foam (23), the number of side core-pulling through holes (29) on the third lateral foam (24), the number of side core-pulling through holes (29) on the first upper platen (7), the number of side core-pulling through holes (29) on the second upper platen (8), and the number of side core-pulling through holes (29) on the fourth upper platen (10) are all 4, and the number of side core-pulling through holes (19) is 12 in total.
6. The wing connector mould structure according to claim 1, wherein the main beams (20) and the auxiliary beams (21) are carbon fibre tube structures.
7. A method of manufacturing a wing connector, characterized in that a wing connector mould structure according to any one of claims 1-6 is used, further comprising the steps of: S1, assembling a die base, and integrally dividing a foam sandwich layer into 7 blocks, wherein 3 blocks of transverse foam correspond to wing ribs, and 4 blocks of vertical foam correspond to front and rear edges of the wing; s2, gluing at a reserved hole of the foam sandwich layer and inserting a carbon fiber tube, after solidification, integrally placing the foam sandwich layer into a mold base (1), and inserting a core rod at the position of the carbon tube to fix the carbon tube and the foam; S3, gluing 4 vertical foams, putting the vertical foams into a mold base (1), taking out the foams after curing, coating carbon fibers, and simultaneously placing side core pulling cores (19) at corresponding positions; S4, placing the connecting piece coated by the carbon fiber and the side core pulling piece (19) into a mold base; s5, placing all the upper pressing plates and the lower pressing plates; S6, placing the side die assembly and fixing the side die assembly by bolts; s7, integrally winding, ventilating and bonding after the assembly is completed, and sleeving a vacuum bag into the vacuum bag for sealing; S8, loosening the vacuum bag after solidification, and ventilating and sticking; s9, punching out side core pulling by using a punching needle from an opening position of the die base (1), and pulling out the core tube by using a pin puller; S10, dismantling the upper pressing plate, the lower pressing plate and the side die assembly; s11, taking out the finished product of the unmanned aerial vehicle wing connector.

Description

Wing connecting piece mould structure and wing connecting piece manufacturing method Technical Field The invention relates to a connecting piece die structure between an unmanned aerial vehicle wing transition section and an upper reverse section, in particular to a die structure for preparing a carbon fiber composite material connecting piece between the unmanned aerial vehicle wing transition section and the upper reverse section, and particularly relates to a wing connecting piece die structure and a wing connecting piece manufacturing method. Background In unmanned aerial vehicle development and manufacturing process, the effect of connecting piece between wing changeover portion and the last section of turning over is according to the designing requirement, connects changeover portion and last section of turning over, makes and forms an contained angle between section of turning over and the changeover portion. In order to improve the connection strength and the precision, wing-shaped precision and stability are guaranteed so as to control the elevation angle of the unmanned aerial vehicle within an allowable error range, and high requirements are put on the strength, the rigidity and the precision of the connecting piece. The cost of manufacturing the connector depends on the manufacturing process, which in turn affects the manufacturing time and quality of the finished product. In the preparation process of the carbon fiber composite material connecting piece, although the traditional composite material laminated plate can provide excellent mechanical properties, the addition of the multi-layer carbon cloth can greatly improve the weight of a finished product and increase the preparation cost and the subsequent processing difficulty. Therefore, focusing on the technical requirements of light weight and high strength of the unmanned aerial vehicle, the application of the foam sandwich carbon fiber composite material connecting piece is beneficial to reducing the weight of finished parts, improving the preparation precision and reducing the preparation cost. However, in terms of structure, the carbon fiber coated foam sandwich connecting piece is very difficult to integrally form due to the characteristics of complex structure, complex parting, multiple holes, requirement for side core pulling and the like, so that the carbon fiber coated foam sandwich connecting piece is very important to the design of the die structure, assembly and demolding of the connecting piece; In the aspect of quality, as an important part of the unmanned aerial vehicle wing, the manufacturing precision of the connecting piece between the transition section and the upper reverse section directly influences the aerodynamic characteristics of the unmanned aerial vehicle, so that reasonable connecting piece die design is a necessary factor for ensuring the light weight, the high strength and the high precision of the connecting piece. However, there are currently few reports on unmanned aerial vehicle wing connector mold designs. Disclosure of Invention Aiming at the defects in the prior art, the invention aims to provide a wing connecting piece die structure and a wing connecting piece manufacturing method. The invention provides a wing connecting piece mould structure, which comprises a mould base, a foam sandwich layer, side mould components, a first upper pressing plate, a second upper pressing plate, a third upper pressing plate, a fourth upper pressing plate, a lower pressing plate component, a main beam, an auxiliary beam and a plurality of side loose cores, wherein the mould base is provided with a plurality of side loose cores; the side die assembly is arranged at the top end of the die base, the foam sandwich layer is arranged in the die base, the first upper pressing plate, the second upper pressing plate, the third upper pressing plate, the fourth upper pressing plate and the lower pressing plate are all arranged in the foam sandwich layer, The main beam and the auxiliary beam penetrate through the die base, and the side core pulling is detachably arranged on the foam sandwich layer. Preferably, the foam sandwich layer comprises a first transverse foam, a second transverse foam, a third transverse foam, a first vertical foam, a second vertical foam, a third vertical foam and a fourth vertical foam; the second transverse foam is arranged between the first transverse foam and the third transverse foam, and a first vertical foam is arranged between one end of the first transverse foam and one end of the second transverse foam; a third vertical foam is arranged between the other end of the first transverse foam and the other end of the second transverse foam; a second vertical foam is arranged between one end of the third transverse foam and one end of the second transverse foam; The first transverse foam, the second transverse foam and the third transverse foam are respectively provided with a side core-pulling through h