CN117245942B

CN117245942B - Composite material airborne component, forming die and forming method

Info

Publication number: CN117245942B
Application number: CN202311453497.8A
Authority: CN
Inventors: 段冶; 张宏亮; 张建坤; 夏吉升; 孙德权; 姜浩楠
Original assignee: Jiangxi Jiuyou Aviation Equipment Co ltd; Harbin Yuanchi Aviation Equipment Co ltd
Current assignee: Jiangxi Jiuyou Aviation Equipment Co ltd; Harbin Yuanchi Aviation Equipment Co ltd
Priority date: 2023-11-02
Filing date: 2023-11-02
Publication date: 2024-04-02
Anticipated expiration: 2043-11-02
Also published as: CN117245942A

Abstract

The application relates to the technical field of composite material forming generally, and discloses a composite material airborne component, a forming die and a forming method, wherein the airborne component comprises a curved main body, and at least one concave part and at least one convex part are arranged on the curved main body side by side; the die comprises: at least one groove and at least one bulge are arranged on the model body side by side, the groove is used for forming a concave part, and the bulge is used for forming a convex part; the limiting assembly is arranged on the base and comprises at least one first laminated piece, at least one second laminated piece and a limiting mechanism matched with the first laminated piece and the second laminated piece, the shape of the first laminated piece is matched with that of the groove, and the shape of the second laminated piece is matched with that of the protrusion; the limiting component is used for placing the first laminated piece at the position of the upper layer of the isolating film paved on the blank body corresponding to the groove, and limiting the interval between the first laminated piece and the model body through the limiting mechanism to form a concave part with preset thickness.

Description

Composite material airborne component, forming die and forming method

Technical Field

The application relates to the technical field of composite material molding, in particular to a composite material airborne component, a molding die and a molding method.

Background

Multi-bar members are commonly used in the aerospace field to achieve high performance lightweight characteristics on board. The ribs arranged on the multi-rib component are mostly strip-shaped rib parts or abdomen parts, the number of the rib abdomen parts is large, the interval between the rib abdomen parts is small, and the curvature change of the product appearance is large.

The structure of the member is complex, the auxiliary material is generally laminated by an operator method in the traditional molding mode, the auxiliary material at the position of the molding part is ensured to be not bridged, the auxiliary material lamination method cannot ensure uniform thickness of the product, and the molding quality is poor; in addition, if one-step forming is adopted, the deformation is large, defects such as folding and flowing through easily occur at the root of the rib, the rib part is easy to be underfilled, the filling height is insufficient, and the like.

Disclosure of Invention

In view of the foregoing drawbacks or shortcomings in the prior art, it is desirable to provide a composite material on-board member, a molding die and a molding method that can improve the molding quality of the on-board member.

In a first aspect, the present application provides a molding die for a composite airborne component, the airborne component comprising a curved body, the curved body having at least one concave portion and at least one convex portion disposed side-by-side thereon; the mold comprises:

The male die comprises a bottom plate and a model body arranged on the bottom plate, and the male die is fixedly arranged on the base through the bottom plate; at least one groove and at least one protrusion are arranged on the model body side by side, the groove is used for forming the concave part, and the protrusion is used for forming the convex part;

a spacing assembly disposed on the base, the spacing assembly comprising at least one first laminate, at least one second laminate, and a spacing mechanism cooperating with the first laminate and the second laminate, the first laminate having a shape that matches the shape of the recess and the second laminate having a shape that matches the shape of the protrusion;

the male die is used for paving a plurality of layers of prepregs on the surface of the model body in a conformal manner to form a blank body for forming the airborne component;

the limiting assembly is used for placing the first laminated piece at the position, corresponding to the groove, of the upper layer of the isolating film paved on the blank body, and limiting the interval between the first laminated piece and the model body through the limiting mechanism so as to form the concave part with preset thickness; and the second lamination piece is arranged at the position, corresponding to the bulge, of the upper layer of the isolating film paved on the blank body, and the spacing between the second lamination piece and the model body is limited through the limiting mechanism so as to form the convex part with the preset thickness.

Optionally, the model body comprises a model middle section and two model side ends arranged at two ends of the model middle section, the model body is symmetrically arranged about a central preset plane, and the orthographic projection of the model side ends on the central preset plane gradually decreases in height from the model middle section to the model side ends; the model middle section comprises a first side edge and a second side edge which are oppositely arranged along the direction of a vertical preset plane, the height of the orthographic projection of the model middle section on the direction from the center to two sides of the vertical preset plane gradually decreases, and the vertical preset plane is perpendicular to the center preset plane.

Optionally, the curved main body comprises a plurality of concave parts arranged side by side, and a main body part is arranged between two adjacent concave parts; the concave part extends along the direction from the first side edge to the second side edge; the concave part comprises a first curved part and a second curved part arranged around the first curved part, the second curved part is in smooth transition with the main body part, and the curvature of the first curved part is smaller than that of the second curved part;

the model body is provided with a plurality of grooves side by side, and the shape of each groove is matched with that of each concave part;

The first laminated piece comprises a first laminated part and a first side laminated part arranged around the first laminated part, the first laminated part comprises a first laminated curved part and a second laminated curved part arranged around the first laminated curved part, the first laminated curved part is matched with the shape of the first curved part, and the second laminated curved part is matched with the shape of the second curved part; the first side pressure part is matched with the shape of the main area of the model body.

Optionally, the curved main body includes a plurality of protrusions arranged side by side, and a main body is arranged between two adjacent protrusions; the convex part extends along the direction from the first side edge to the second side edge; the convex part comprises a first arc part and a second arc part arranged around the first arc part, the second arc part is in smooth transition with the main body part, and the curvature of the first arc part is smaller than that of the second arc part;

the model body is provided with a plurality of bulges side by side, and the shape of each bulge is matched with that of each convex part;

the second laminated member includes a second laminated portion including a first laminated arc portion matching a shape of the first arc portion and a second laminated arc portion provided around the second laminated portion, the second laminated arc portion matching a shape of the second arc portion; the second side pressure portion is matched with the shape of the main body region of the model body.

Optionally, the on-board member includes a side body disposed around the curved body, the side body being disposed perpendicular to the central preset plane;

the model body comprises a product area and a margin area, wherein the product area covers partial areas of the curved main body and the side main body, and the margin area covers partial areas of the side main body;

the model body further comprises an edge zone arranged around the allowance zone, and the model body is fixedly connected with the bottom plate through the edge zone.

Optionally, an air guide assembly surrounding the product area is arranged on the bottom plate, the air guide assembly comprises an air guide groove arranged on the bottom plate and an air guide plate covered on the air guide groove, and an air suction hole and a plurality of air guide holes which are communicated with the air guide groove are arranged on the air guide plate; the air guide groove is arranged in the edge area.

Optionally, the limiting mechanism includes a detachable limiting frame disposed on the bottom plate, the limiting frame is disposed in the edge area, and the limiting frame is adapted to the shape of the bottom plate;

a first limiting piece matched with the first lamination piece is movably arranged on the limiting frame, one side, away from the model body, of the first lamination piece is contacted with the first limiting piece, and the first limiting piece is used for pushing the first lamination piece to move along the direction away from or close to the model body so as to enable the first lamination piece to be in tight contact with the multi-layer prepreg paved on the groove;

The movable second limiting piece matched with the second lamination piece is arranged on the limiting frame, one side, away from the model body, of the second lamination piece is in contact with the second limiting piece, and the second limiting piece is used for pushing the second lamination piece to move along the direction away from or close to the model body so as to enable the second lamination piece to be in tight contact with the multi-layer prepreg paved on the protrusion.

Optionally, the two ends of the first lamination part along the vertical preset plane direction of the first lamination part are respectively provided with a first pressing part, the first pressing part is matched with the shape of the bottom plate, and the surface of the first pressing part at one side far away from the bottom plate is in abutting contact with the first limiting part;

the second lamination piece is provided with second pressing parts along two ends of the second lamination part in the direction vertical to the preset plane, the second pressing parts are matched with the shape of the bottom plate, and the surface of one side, far away from the bottom plate, of the second pressing parts is in abutting contact with the second limiting piece.

In a second aspect, the present application provides a method for forming a composite airborne component, using a forming die for a composite airborne component as described in any one of the above, the method comprising:

Paving preset layers of prepregs on the surface of the model body along with the shape, wherein the preset layers of prepregs at least cover the grooves; the first lamination piece is driven by the limiting mechanism to laminate the multi-layer prepreg laid on the groove in a tight contact manner, and the second lamination piece is driven by the limiting mechanism to laminate the multi-layer prepreg laid on the protrusion in a tight contact manner;

repeating the laying operation and the laminating operation of the prepregs until all prepregs for forming the concave parts and all prepregs for forming the convex parts are laid and laminated to form a blank;

laying an isolating film on the blank, placing the first laminated piece on the isolating film at a position corresponding to the groove, and limiting the interval between the first laminated piece and the model body through the limiting mechanism so as to form the concave part with preset thickness; placing the second laminate on the release film at a position corresponding to the protrusion, and defining a space between the second laminate and the model body by the limiting mechanism to form the protrusion of a preset thickness;

and forming the airborne component by a vacuum hot press forming process.

In a third aspect, the present application provides a method of forming a composite airborne component, optionally using a forming die of a composite airborne component as described in any one of the preceding.

The technical scheme provided by the embodiment of the application can comprise the following beneficial effects:

according to the forming die for the composite material airborne component, the prepreg used for forming the concave part and the convex part is laminated through the limiting component arranged on the base, and the cavity used for forming the concave part or the convex part can be formed through the first lamination piece and the second lamination piece after lamination is completed, so that the forming yield of the airborne component is improved, and the forming quality is improved.

Drawings

Other features, objects and advantages of the present application will become more apparent upon reading of the detailed description of non-limiting embodiments, made with reference to the following drawings, in which:

fig. 1 is a schematic structural diagram of an airborne component according to an embodiment of the present application;

FIG. 2 is a schematic cross-sectional view of an airborne component provided by an embodiment of the application;

FIG. 3 is an enlarged schematic view of a recess provided by an embodiment of the present application;

FIG. 4 is an enlarged schematic view of a protrusion provided by an embodiment of the present application;

Fig. 5 is a schematic structural diagram of a molding mold according to an embodiment of the present disclosure;

FIG. 6 is a top view of a forming die according to an embodiment of the present application;

FIG. 7 is a side view of a forming die provided in an embodiment of the present application;

fig. 8 is a schematic structural diagram of another molding die according to an embodiment of the present disclosure;

FIG. 9 is a schematic view illustrating installation of a spacing assembly according to an embodiment of the present application;

fig. 10 is a schematic structural diagram of a limiting component according to an embodiment of the present application;

FIG. 11 is a schematic structural view of a first laminate according to an embodiment of the present application;

FIG. 12 is a schematic structural view of a second laminate provided in an embodiment of the present application;

FIG. 13 is a schematic diagram illustrating an installation of a spacing assembly and an air guide assembly according to an embodiment of the present disclosure;

FIG. 14 is an exploded view of a first air guide provided in an embodiment of the present application;

FIG. 15 is a schematic cross-sectional view of a first air guide provided in an embodiment of the present application;

FIG. 16 is a schematic structural view of a second air guide according to an embodiment of the present disclosure;

FIG. 17 is a top view of another first laminate provided by embodiments of the present application;

FIG. 18 is a top view of another second laminate provided by embodiments of the present application;

FIG. 19 is a schematic lay-up of a first prepreg according to an embodiment of the present application;

FIG. 20 is a schematic illustration of the laying of an electrically heated layer according to an embodiment of the present application;

FIG. 21 is a schematic view of another recess provided in an embodiment of the present application;

FIG. 22 is a schematic structural view of a first preform according to an embodiment of the present application;

FIG. 23 is a front view of a first preform provided by an embodiment of the present application;

FIG. 24 is a schematic lay-up of another first prepreg according to an embodiment of the present application;

fig. 25 is a schematic drawing of conformal lay-up of a prepreg according to an embodiment of the present application.

In the figure:

100. an onboard component; 200. a forming die; 300. a rubber blocking strip; 400. an electrical heating layer; 500. a gas-guiding layer; 600. a vacuum membrane;

110. a curved body; 120. a side main body; 130. a first side; 140. a second side; 101. a concave portion; 102. a convex portion; 103. a main body portion;

111. a first surface; 112. a second surface; 113. a first concave surface; 114. a second concave surface; 115. a first convex surface; 116. a second convex surface; 123. a first curved surface; 124. a second curved surface; 125. a first cambered surface; 126. a second cambered surface; 127. a third cambered surface; 128. a fourth cambered surface;

210. A model body; 220. a first laminate; 230. a first side edge; 240. a second side edge; 250. a limit component; 260. a second laminate; 270. an air guide assembly; 280. a first pre-press;

201. a groove; 202. a protrusion; 203. a body region; 204. a first curved mold portion; 205. a second curved mold portion;

d1, a product area; d2, a margin area; d3, an edge area;

211. a base; 212. a male die; 213. a bottom plate;

221. a first lamination section; 222. a first side pressing part; 223. a first lamination flexure; 224. a second lamination flexure; 225. a first pressing portion;

231. a second lamination section; 232. a second side pressure section; 233. a first laminated arc section; 234. a second laminated arc section; 235. a second pressing portion;

241. a limit frame; 242. a first limiting member; 243. a second limiting piece; 244. a third limiting member;

254. a first air guide; 255. a second air guide; 261. a first air guide groove; 262. a first air guide plate; 263. a first air vent; 264. a second air guide groove; 265. a second air guide plate; 266. a second air guide hole; 267. a third air guide groove; 268. a third air guide plate; 269. a third air vent; 271. a fourth air guide groove; 272. a fourth air guide plate; 273. a fourth air guide hole;

281. A first pre-pressing part; 282. a first side pre-pressing part; 283. a first pre-compression curve; 284. a second pre-compression curve; 285. a first pre-pressing portion;

510. presoaking blocks; 520. a rounded tip; 530. an arc surface; 540. a first plane; 550. a second plane.

Detailed Description

The present application is described in further detail below with reference to the drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be noted that, for convenience of description, only the portions related to the invention are shown in the drawings.

It should be noted that, in the case of no conflict, the embodiments and features in the embodiments may be combined with each other. The present application will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.

As shown in fig. 1-2, the present application provides a composite airborne component 100, the airborne component 100 comprising a curved body 110, the curved body 110 having at least one recess 101 and/or at least one protrusion 102 disposed side-by-side thereon.

In this application, the airborne component 100 has a certain length along a first direction, a certain width along a second direction, and a certain thickness along a third direction, where the first direction, the second direction, and the third direction are perpendicular to each other and preset planes. In the present application, a central preset plane is defined as a plane defined by a first direction and a third direction, and a vertical preset plane is defined as a plane defined by a second direction and a third direction.

In the first direction, the curved body 110 includes a body middle section and two body side ends disposed at two ends of the body middle section, the curved body 110 is symmetrically disposed about a central preset plane, and the height of the orthographic projection of the body side end on the central preset plane gradually decreases from the body middle section to the body side end direction.

In the second direction, the main body middle section includes a first side 130 and a second side 140 that are disposed opposite to each other along a preset vertical preset plane, the height of the front projection of the main body middle section on the preset vertical preset plane in the direction from the center to the two sides gradually decreases, and the preset vertical preset plane and the center preset plane are perpendicular to each other.

The shape of the curved body 110 is not limited in the embodiment of the present application, and may be set as needed in different embodiments. In some embodiments, the on-board component 100 includes a side body 120 disposed around the curved body 110, the side body 120 is disposed perpendicular to the central preset plane, and the side body 120 facilitates the fixed connection of the on-board component 100 to the external structure.

In this embodiment, the extending directions of the concave portion 101 and the convex portion 102 are consistent, and the concave portion 101 and the convex portion 102 both extend in the second direction, that is, the concave portion 101 extends in the direction from the first side 130 to the second side 140, and the convex portion 102 extends in the direction from the first side 130 to the second side 140.

Of course, in different embodiments, the concave portion 101 and the convex portion 102 may have a certain included angle with the second direction, or the concave portion 101 and the convex portion 102 extend in a curved shape, which is not limited in this application, and the number of the convex portions 102 and the concave portion 101 is not limited, and may be adjusted as required in different embodiments.

It should be noted that, the number of the concave portions 101 and the convex portions 102 on the curved body 110 is not limited in this application, and the arrangement manner between the concave portions 101 and the convex portions 102 may be adjusted as required. The concave portions 101 and the convex portions 102 may be alternately arranged or may be arranged in other ways, which is not limited in the present application.

In a cross section perpendicular to a preset plane, the curved body 110 includes a first surface 111 and a second surface 112 that are disposed opposite to each other, the concave portion 101 is recessed from the first surface 111 toward the second surface 112, the convex portion 102 protrudes from the second surface 112 toward the first surface 111, that is, the extending directions of the concave portion 101 and the convex portion 102 are opposite, and the curved body 110 includes a body portion 103 except for the concave portion 101 and the convex portion 102, that is, a region between the adjacent concave portion 101 and the concave portion 101, between the adjacent convex portion 102 and the convex portion 102, or between the adjacent convex portion 102 and the concave portion 101 is the body portion 103.

As shown in fig. 3, the concave portion 101 includes a first concave surface 113 and a second concave surface 114 that are disposed opposite to each other, the first concave surface 113 is in extended connection with the first surface 111 of the main body 103, the second concave surface 114 is in extended connection with the second surface 112 of the main body 103, and the first concave surface 113 and the second concave surface 114 each protrude along the first surface 111 toward the second surface 112. As shown in fig. 4, the convex portion 102 includes a first convex surface 115 and a second convex surface 116 disposed opposite to each other, the first convex surface 115 is in extended connection with the first surface 111 of the main body 103, the second convex surface 116 is in extended connection with the second surface 112 of the main body 103, and the first convex surface 115 and the second convex surface 116 each protrude along the second surface 112 toward the first surface 111.

The number of the concave portions 101 on the curved body 110 is not limited in the embodiment of the present application, and the number of the concave portions 101 may be two, three or more. The size of the recess 101 is not limited, and the lengths, widths, thicknesses, and the like of the plurality of recesses 101 may be the same or different.

The cross-sectional shapes of the concave portion 101 and the convex portion 102 are not limited in the embodiment of the present application, for example, a cross-sectional projection of the concave portion 101 and the convex portion 102 on a central preset plane is arc-shaped.

As shown in fig. 5-7, the present application provides a molding die 200 of a composite airborne component 100, the composite airborne component 100 can be molded by using the molding die 200, and the molding die 200 includes:

the device comprises a base 211 and a male die 212 arranged on the base 211, wherein the male die 212 comprises a bottom plate 213 and a model body 210 arranged on the bottom plate 213, and the male die 212 is fixedly arranged on the base 211 through the bottom plate 213.

The shape of the model body 210 is matched with that of the curved main body 110, at least one groove 201 and at least one protrusion 202 are arranged on the model body 210 side by side, the groove 201 is used for forming the concave part 101, and the protrusion 202 is used for forming the convex part 102; the shape of the recess 201 matches the shape of the recess 101 and the shape of the protrusion 202 matches the shape of the protrusion 102.

In this application, the recess 201 and the protrusion 202 each extend in a direction from the first side edge 230 to the second side edge 240. The mould body comprises a main body region 203 in addition to the recess 201 and the protrusion 202, the main body region 203 being used for shaping the main body portion 103.

The male die 212 is used for laying multiple layers of prepregs on the surface of the mold body 210 in a conformal manner to form a blank for molding the airborne component 100. The model body 210 includes a product area D1 for forming the on-board component 100, the product area D1 being for forming a first product sub-area of the curved body 110 and a second product sub-area for forming the side body 120.

The model body 210 includes a model middle section and two model side ends disposed at two ends of the model middle section at a position corresponding to the first product subregion, the model body 210 is symmetrically disposed about a center preset plane, and a height of the orthographic projection of the model side ends on the center preset plane in a direction from the model middle section to the model side ends gradually decreases; the middle section of the model comprises a first side edge 230 and a second side edge 240 which are oppositely arranged along the direction of a vertical preset plane, the height of the front projection of the middle section of the model in the direction from the center to two sides of the vertical preset plane is gradually decreased, and the vertical preset plane is perpendicular to the center preset plane.

The mould body 210 is arranged parallel to the bottom plate 213 on the corresponding second product sub-area. It is understood that the second product sub-area may be coplanar with the bottom plate 213 in the embodiment of the present application, and the second product sub-area may also be non-coplanar with the bottom plate 213, which is not limited in this application.

The mold body 210 includes a product region D1 and a margin region D2 disposed around the product region D1, the product region D1 covering a partial region of the curved body 110 and the side body 120, the margin region D2 covering a partial region of the side body 120; by providing the margin area D2 on the side main body 120 in the embodiment of the present application, the edge shaping adjustment of the airborne component 100 may be achieved by removing the margin area D2, so as to reduce the molding defect of the prepreg at the edge position.

The mold body 210 further includes an edge region D3 disposed around the margin region D2, and the mold body 210 is fixedly connected to the bottom plate 213 through the edge region D3. The fixed connection of the model body 210 and the bottom plate 213 is facilitated by the provision of the edge region D3.

As shown in fig. 8 to 10, the molding die 200 further includes: a spacing assembly 250 disposed on the base 211, the spacing assembly 250 comprising a plurality of laminates, for example, the laminates comprising at least one first laminate 220 and/or at least one second laminate 260, the spacing assembly 250 further comprising a spacing mechanism that mates with the first laminate 220 and the second laminate 260.

The shape of the first laminate 220 matches the shape of the recess 201 and the shape of the second laminate 260 matches the shape of the protrusion 202. The number of first laminates 220 corresponds to the number of grooves 201 and the number of second laminates 260 corresponds to the number of protrusions 202.

Each laminate in the present application may be a metal material, improving the lamination effect. In the embodiment of the application, the mode of independent lamination is adopted, so that the lamination can be conveniently adjusted according to the shapes or the sizes of different concave parts 101, the position of the lamination can be conveniently adjusted according to the mode of laying prepreg, and the like, and concave parts 101 or protrusions 202 with different thicknesses can be conveniently formed.

The limiting mechanism comprises a limiting frame 241 detachably arranged on the bottom plate 213, the limiting frame 241 is arranged in the edge area D3, and the limiting frame 241 is matched with the shape of the bottom plate 213.

A stroke space is formed between the limit frame 241 and the bottom plate 213 for providing a space for the up-and-down movement of lamination of the first laminate sheet and the second laminate sheet to ensure that prepregs at respective positions of the recess 101 in the third direction can be laminated.

The limiting frame 241 is movably provided with a first limiting piece 242 matched with the first laminated piece 220, one side, away from the model body 210, of the first laminated piece 220 is contacted with the first limiting piece 242, and the first limiting piece 242 is used for pushing the first laminated piece 220 to move along a direction away from or close to the model body 210 so as to enable the first laminated piece 220 to be in abutting contact with the multi-layer prepreg paved on the groove 201.

A second limiting member 243 matched with the second lamination member 260 is movably arranged on the limiting frame 241, one side, away from the model body 210, of the second lamination member 260 is in contact with the second limiting member 243, and the second limiting member 243 is used for pushing the second lamination member 260 to move along a direction away from or close to the model body 210 so as to enable the second lamination member 260 to be in abutting contact with the multi-layer prepreg paved on the protrusion 202.

The first limiting member 242 and the second limiting member 243 may be power elements, and may be power elements such as hydraulic, pneumatic, and electric motors, for example, stepper motors; the first limiting member 242 and the second limiting member 243 may also be non-powered elements, such as bolts with adjustable positions, and the first limiting member 242 or the second limiting member 243 may be pushed to move up and down by tightening or loosening the bolts. And in various embodiments selected as desired.

The distance between the lamination piece and the model body 210 can be reliably adjusted to laminate the prepreg with the preset layer number through the limiting of the first limiting piece 242 and the second limiting piece 243, so that the compaction effect can be ensured, and the molding quality of the composite material can be improved.

It will be appreciated that the number of first laminates 220 and the number of grooves 201 in this application are in one-to-one correspondence, and the number of second laminates 260 and protrusions 202 are in one-to-one correspondence.

In this embodiment, at least one first limiting member 242 and a plurality of second limiting members 243 are disposed on the same limiting mechanism, the first limiting members 242 are in one-to-one correspondence with the number of the first laminates 220, the second limiting members 243 are in one-to-one correspondence with the number of the second laminates 260, that is, the first limiting members 242 in abutting contact with the first laminates 220 and the second limiting members 243 in limiting abutting contact with the second laminates 260 can be respectively adjusted, so that lamination and molding of concave portions 101 and convex portions 102 with different thicknesses can be realized.

As shown in fig. 11, in order to facilitate the limitation of the first laminated member 220, when in setting, the first laminated member 220 is respectively provided with a first pressing portion 225 at two ends of the first laminated portion 221 along the direction of the vertical preset plane, the first pressing portion 225 is adapted to the shape of the bottom plate 213, and the surface of the first pressing portion 225 far from one side of the bottom plate 213 is in abutting contact with the first limiting member 242. The first pressing portion 225 is planar, and is conveniently abutted against the bottom plate 213 on the lower surface and is conveniently abutted against the first limiting member 242 on the upper surface.

As shown in fig. 12, the second lamination part 260 is provided with second pressing parts 235 at two ends of the second lamination part 231 along the direction of the vertical preset plane, the second pressing parts 235 are adapted to the shape of the bottom plate 213, and the surface of the second pressing parts 235 far from the side of the bottom plate 213 is in contact with the second limiting member 243. The second pressing portion 235 is planar, and is conveniently abutted against the bottom plate 213 on the lower surface and is conveniently abutted against the second limiting member 243 on the upper surface.

Alternatively, the first laminate 220 includes a first laminate part 221 and a first side pressure part 222 disposed around the first laminate part 221, and the second laminate 260 includes a second laminate part 231 and a second side pressure part 232 disposed around the second laminate part 231.

Wherein the first lamination portion 221 matches the shape of the groove 201, the first side pressure portion 222 matches the shape of the main body region 203 of the mold body 210, and the main body region 203 is the region of the mold body 210 adjacent to both sides of the groove 201; the second laminating portion 231 is matched with the shape of the protrusion 202, the second side pressure portion 232 is matched with the shape of the main body region 203 of the mold body 210, and the main body region 203 is a region of the mold body 210 adjacent to both sides of the protrusion 202.

In this embodiment, the prepreg laid in the groove 201 is laminated by the first laminating portion 221, the prepregs on the main body area 203 on two sides of the groove 201 are laminated by the first side pressing portion 222, and in addition, the prepreg in the main body area 203 is abutted against and contacted with the first side pressing portion 222, so that the first laminating portion 220 can be further limited, the first laminating portion 220 is limited, and similarly, the lamination of the main body area 203 and the second laminating portion 260 can be realized by the second laminating portion 231, so that the laminating effect is improved.

In one embodiment of the present application, a cavity may also be formed between the laminate and the mold body 210 by the restraint of the first restraint 242 and the second restraint 243. Specifically, the limiting component 250 is configured to place the first laminate 220 at a position corresponding to the groove 201 on an upper layer of the isolation film laid on the blank, and define a space between the first laminate 220 and the model body 210 by the limiting mechanism to form the recess 101 with a first preset thickness; and the second lamination piece 260 is placed at a position corresponding to the protrusion 202 on the upper layer of the isolating film laid on the blank body, and the spacing between the second lamination piece 260 and the model body 210 is limited by the limiting mechanism so as to form the protrusion 102 with a second preset thickness.

The mode of adopting the metal laminate in this application has avoided the vacuum hot briquetting in-process, and the separation of resin on the prepreg, gathering have guaranteed the product thickness of concave part or convex part, are fit for the shaping quality of product, need not the later stage and repair, and the recess 201 region is filled to the metal platen board simultaneously, and the mould wholly presents smooth surface after filling, and it is more convenient to paste the vacuum bag of system, has provided production efficiency, and simultaneously effectually prevented the explosion bag risk that concave part or convex part position vacuum bag bridging leads to in the solidification process. The curing process in this application refers to a vacuum thermoforming process.

As shown in fig. 13, in some embodiments of the present application, an air guide assembly 270 surrounding the product area D1 is disposed on the bottom plate 213, and the air guide assembly 270 includes an air guide groove disposed on the bottom plate 213, and an air guide plate disposed on the air guide groove in a covering manner, where an air suction hole and a plurality of air guide holes are disposed on the air guide plate and are in communication with the air guide groove; the air guide groove is arranged in the edge area D3.

Through the air guide assembly 270 provided in the application, the air guide assembly 270 is convenient to vacuumize in the lamination process and after the lamination is completed, and the lamination effect and the vacuum forming effect are improved.

In order to provide the vacuum pumping capability, the air guide assembly 270 includes a first air guide 254 disposed around the mold body 210, as shown in fig. 14 to 15, the first air guide 254 includes a first air guide groove 261 and a first air guide plate 262 covering the first air guide groove 261, and a plurality of first air guide holes 263 are disposed on the first air guide plate 262, and the first air guide groove 261 forms an air guide cavity disposed around the mold body 210, and the air guide cavity is used for connecting with the vacuum pumping assembly.

In this embodiment of the present application, the edge area D3 is disposed around the product area D1, so that the air guide cavity is disposed on the edge area D3, so that an annular air guide structure disposed around the product area D1 may be formed, and the air guide rate may be ensured to be constant during lamination and curing, so as to improve the uniformity of lamination and curing.

In this application, a first air vent 263 on the first air guide plate 262 near the position of one end can be used as an air vent, the air vent is fixedly connected with the air suction nozzle, the non-contact area of the air vent and the first air guide plate 262 is filled with an airfelt or a sealing adhesive tape, the filled area exceeds the area of the air vent, and bridging is prevented during vacuumizing.

As shown in fig. 16, the air guide assembly 270 further includes at least one second air guide 255, the shape of the second air guide 255 is matched with the shape of the main body region 203 (main body 103), a second air guide groove 264 communicating with the air guide cavity is provided on the second air guide 255, and a second air guide plate 265 covering the second air guide groove 264, and a plurality of second air guide holes 266 are provided on the second air guide plate 265.

The second air guide 255 is also fixed on the model body 210 by the pressing mechanism, for example, a third limiting member 244 matched with the second air guide 255 is movably disposed on the limiting frame 241, one side of the second air guide 255 away from the model body 210 contacts with the third limiting member 244, and the third limiting member 244 is used for pushing the second air guide 255 to move along a direction away from or close to the model body 210. It will be appreciated that the second air guide 255 forms a cavity with the mold body 210, and the cavity is used to mold the main body 103 of the airborne component 100. The limiting member is used for adjusting the distance between the second air guide 255 and the model body 210 to control the thickness of the main body 103.

As shown in fig. 17, in the first laminate 220, a third air guide groove 267 communicating with the air guide chamber is provided in the first side pressing portion 222, a third air guide plate 268 covering the third air guide groove 267 is further provided in the first side pressing portion 222, and a plurality of third air guide holes 269 are provided in the third air guide plate 268.

In this application, the first side pressure portion 222 matches the shape of the main body region 203 of the model body 210; the first side pressing part 222 includes two first pressing parts 225 extending from the mold body 210 to the side plates, and the third air guide groove 267 extends from a position corresponding to the first lamination part 221 to the first pressing parts 225 and communicates with the first air guide groove 261.

As shown in fig. 18, in the second laminate 260, a fourth air guide groove 271 communicating with the air guide chamber is provided in the second side pressure portion 232, a fourth air guide plate 272 covering the fourth air guide groove 271 is further provided in the second side pressure portion 232, and a plurality of fourth air guide holes 273 are provided in the fourth air guide plate 272.

The second side pressure 232 matches the shape of the main body region 203 of the mold body 210; the second side pressure portion 232 includes two second pressure applying portions 235 extending from the mold body 210 to the side plates, and the fourth air guide groove 271 extends from a position corresponding to the first lamination portion 221 to the second pressure applying portion 235 and communicates with the first air guide groove 261.

In this embodiment, the second air guide 255 and the third air guide groove 267 disposed on the first laminate 220, and the fourth air guide groove 271 disposed on the second laminate 260 can facilitate air guide on the main body region 203 of the mold body 210 during lamination operation and curing process, so that internal vacuum pumping is more uniform, and lamination effect or molding effect is improved.

It should be noted that, in the embodiment of the present application, the positional relationship between the first air guide 254 and the limiting frame 241 is not limited, in some embodiments, the first air guide 254 may be disposed below the limiting frame 241, and the first air guide 254 may be disposed on a side of the limiting frame 241 away from the model body, or disposed on a side of the limiting frame 241 near the model body, which is not limited in this application, so as not to affect the vacuum pumping through the vacuum bag or the vacuum film 600.

In this embodiment, the first side pressing portion 222 is overlapped with the edge area D3, on one hand, the first lamination piece 220 is used for limiting the height of the concave portion 101, on the other hand, an air guiding structure that is mutually communicated is formed between the first lamination piece 220 and the first air guiding piece 254, when the first air guiding piece is disposed on one side of the limiting frame and far away from the model body, the height of the first air guiding piece 254 can be set to be the height of the concave portion 101, and the first air guiding piece 254 is in direct contact with the first lamination piece 220, so that not only the limiting effect but also the air guiding effect can be achieved.

It will be appreciated that, in various embodiments, in order to achieve air-guiding communication between the first air-guiding member 254 and the first laminate 220 and the first air-guiding member 254, a stopper may be further disposed between the first air-guiding member 254 and the first laminate 220, and a through hole is disposed on the stopper, where one end of the through hole is in communication with the first air-guiding groove 261, and the other end is connected with the third air-guiding groove 267. The application is not limited in this regard and may be provided as desired in various embodiments.

The application provides a molding method of a composite airborne component 100, wherein the composite airborne component 100 can be prepared and molded by adopting the molding method, and the method comprises the following steps:

s100, providing a forming mold 200, wherein the forming mold 200 comprises a model body 210 and a limiting assembly 250.

And S200, paving a preset number of layers of prepregs on the surface of the model body 210 in a conformal manner, wherein the preset number of layers of prepregs at least cover the grooves 201, as shown in fig. 19.

In the embodiment of the present application, the resin-based composite material is a prepreg, and the prepreg includes a substrate and a composite material impregnated on the substrate, where the substrate may be glass fiber cloth or carbon fiber cloth, and the composite material may be various plastic resins, and the embodiment of the present application is not limited in particular.

The total number of layers of the prepreg used to form the airborne component 100 in the embodiments of the present application may be 20 to 60 layers, etc. In this embodiment, the number of layers of the prepreg laid during each lamination may be a preset number of layers, where the preset number of layers is determined according to actual processing requirements, and may be two layers, three layers, four layers or five layers, which is not specifically limited in the embodiment of the present application, so long as compaction of each layer of prepreg can be ensured, and molding quality of the composite material can be ensured.

S300, fixing the first laminate 220 on the first prepreg at the position of the groove 201 by the first stopper 242, and fixing the second laminate 260 on the second prepreg at the position of the protrusion 202 by the second stopper 243.

In the lamination process, the first prepreg of the preset number of layers is laminated through the first laminate 220, and the second prepreg of the preset number of layers is laminated through the second laminate 260.

S400, repeating the prepreg lay-up operation and the lamination operation until all prepregs for molding the concave portion 101 and all prepregs for molding the convex portion 102 are laminated, to form a green body for molding the airborne component 100.

In the embodiment of the present application, the lamination operation is performed in steps S300 to S400, taking the prepreg on the groove 201 as an example.

S210, laying a plurality of layers of prepregs on the groove 201 in a conformal manner, and placing the first laminated piece 220 on the prepreg at the position of the groove 201 on the isolating film; a gas-guiding layer 500 and a vacuum film 600 are laid on the mold body 210 and the first laminate 220.

S220, forming a negative pressure between the vacuum film 600 and the first laminate 220, and laminating the prepreg by the first laminate 220 by using the negative pressure.

It will be appreciated that as the number of layers of laid prepreg increases, the groove 201 will be filled and the distance of the outermost layer of prepreg from the molding surface of the mold body 210 increases, so each time the prepreg is laminated, the distance between the first laminate 220 and the mold body 210 needs to be gradually increased, i.e. as the number of layers of laid prepreg increases, the first laminate 220 is gradually moved away from the groove 201.

In this embodiment, the distance between the first laminate 220 and the model body 210 may be limited by a limiting mechanism, and the method includes:

By moving the first limiting member 242 on the limiting frame 241 upward, the first laminated member 220 is abutted against the first limiting member 242, and the distance between the lower portion of the first limiting member 242 and the model body 210 is matched with the thickness of the multi-layer prepreg laid on the model body 210, so that the first laminated member 220 is abutted against the multi-layer prepreg laid on the groove 201 in a conformal manner.

It should be further noted that, in this embodiment of the present application, the first lamination 220 and the first limiting member 242 may be detachably connected or non-connected, so that the laying of the prepregs on the model body 210 is not affected, after the laying of the multiple layers of prepregs to be laminated is completed, by placing the first lamination 220 on the multiple layers of prepregs and corresponding to the positions of the grooves 201, the first limiting member 242 may be used to implement the alignment between the first lamination 220 and the grooves 201, so as to ensure that the first lamination 220 may be completely clamped with the grooves 201; the degree of compaction between the first laminate 220 and the prepreg can also be achieved, ensuring that the first laminate 220 and the prepreg are fully consolidated, without warping, and ensuring uniform stress.

In this embodiment, each layer of the prepreg is laid on the groove 201 in a conformal manner, and the shape of each layer of the prepreg is the same as the shape of the groove 201. The first laminate 220 may laminate the plurality of layers of prepregs on the groove 201 at positions corresponding to the first curved mold portion 204 by means of a first lamination curved portion 223, laminate the prepregs on the second curved mold portion 205 by means of the second lamination curved portion 224, and laminate the plurality of layers of prepregs on the body region 203 by means of the first side pressure portion 222.

Since the gas flowability of the sealed gas is poor at normal temperature, if bubbles are sealed in the intermediate region of the product, the normal temperature lamination cannot completely remove the bubbles, and in particular, the lamination effect due to the bubbles is remarkably reduced with the increase of the number of layers to be laid. In the application, the high-temperature negative pressure mode can effectively discharge bubbles generated by laying, and the lamination effect is improved.

Wherein, laminate by high temperature negative pressure mode, the said method includes:

s211, as shown in fig. 20, a rubber stopper strip 300 is provided around the prepreg on the outer side of the mold body 210, and a gap is provided between the rubber stopper strip 300 and the prepreg. The dam strip 300 thickness remains the same as or slightly higher than the actual prepreg thickness. The gap around the rubber blocking strip 300 and the prepreg is 2-3mm, the corner lap joint of the rubber blocking strip 300 needs to be sealed, no gap is reserved, and the rubber blocking strip 300 is arranged to prevent the edge of the prepreg close to the electric heating layer 400 from melting to cause the rubber to overflow onto the electric heating layer 400, so that the molding quality and the functions of the electric heating layer 400 are affected.

S212, paving an electric heating layer 400 on the periphery of the rubber blocking strip 300, which is far away from the prepreg; by disposing the electrically heated layer 400 at a position close to the air guide assembly 270, the electrically heated layer 40 covers at least the first air guide groove 261. Can be laid above or below the first air guide plate 262 to increase the air flow rate and thus the vacuum pumping capacity by heating the air guide assembly 270.

S213, laying the air guide layer 500 and the vacuum film 600 on the air guide layer 500, wherein the air guide layer 500 extends from the model body 210 to the electric heating layer 400; the vacuum film 600 covers at least the gas guide layer 500.

Alternatively, the air guide layer 500 includes two layers of porous barrier films and one layer of airfelt that are stacked, and the porous barrier films are disposed and laid on a side close to the prepreg.

In this application, the vacuum film 600 and the air guide layer 500 extend to cover the air guide assembly, and vacuum can be drawn between the model body 210 and the vacuum film 600 through the air guide assembly.

S214, vacuumizing the prepreg and the first laminate 220 through the vacuum film 600, and heating the prepreg and the first laminate through the electric heating layer 400.

A round hole with the diameter of an air suction hole is formed in the middle of a rubber plate with the diameter of 100mm multiplied by 100mm on the air-permeable felt, the air-permeable felt penetrates through the air suction hole and covers the periphery of the air suction hole, and a sealing adhesive tape is used for sealing the air suction hole and the rubber plate at the bottom of the air suction hole. The vacuum membrane 600 is also perforated with holes of the same diameter as the pumping holes at the pumping holes. The air suction hole penetrates through the vacuum membrane 600, the vacuum membrane 600 is adhered to the sealing adhesive tape at the bottom end of the vacuum port, and the vacuum membrane 600 and the vacuum port are sealed again by using the sealing adhesive tape on the vacuum membrane 600, so that the overall tightness is ensured.

It should be noted that, the vacuum film 600 laid during the lamination process in the present application is used to compact the prepreg through the first laminate 220, and the first laminate 220 can apply a lamination force to the multi-layer prepreg in a vacuum manner, so as to improve the lamination uniformity; this is different from the vacuum bag laid during the vacuum hot press forming process, which is a curing process, so that the pre-tightening material is cured and formed after flowing by means of vacuum and heating.

Wherein the vacuum film 600 and the vacuum bag laid during curing may use the same film bag, which is not limited in this application. Can be reused in different procedures.

In the embodiment of the present application, the number of times and the number of layers of the high-temperature negative pressure in the lamination process are not limited, and in different embodiments, in order to improve the lamination rate, lamination of prepregs with a certain number of layers may be performed by normal-temperature lamination; with the lamination of the laying thickness, the lamination is performed by adopting a high-temperature negative pressure mode in order to improve the lamination effect.

Still further to enhance the lamination effect, the method comprises: lamination is performed in the lamination operation by means of an external positive pressure and an internal negative pressure. By the method, the problem that bulges or bridging and the like cannot exist between the prepregs of two adjacent layers can be avoided, and further the quality of a formed product can be improved.

Specifically, lamination is performed by means of external positive pressure and internal negative pressure, and the method comprises the following steps:

s215, vacuumizing the prepreg and the first laminated piece 220, wherein the vacuumizing pressure is not lower than the pressure of-85 Kpa;

s216, applying positive pressure to the outside of the vacuum film 600 through a vacuum tank, wherein the positive pressure is not lower than +60Kpa;

s217, heating to 75 ℃ through the electric heating layer 400 at a speed of 1.5 ℃/min in a vacuum tank, and starting to keep the temperature for 120+/-5 min;

S218, after the constant temperature is finished, heating to 120 ℃ at a speed of 1.5 ℃/min, and starting to keep the temperature for 60+/-5 min;

s219, after the constant temperature is finished, cooling to 65 ℃ at a speed of 1.5 ℃/min, and discharging the mixture from the tank.

In this application, the negative pressure in the autoclave is used to the product area D1 and the positive pressure in the pot is used to heat up and compact the pot according to 2 stages, and the air permeability of the porous isolating membrane is used to exhaust the air in the product area D1. The problem of bubble and layering in the product area D1 can be effectively solved, and meanwhile, for products with large curvature R angles (such as the position of the second curved surface 124), the bridging problem of the R angle area can be effectively controlled, and the problem of product thickness can be solved.

Note that, in the embodiment of the present application, the concave portion 101 and the convex portion 102 are formed by a laying and laminating process, and the processes may partially overlap in time. Since the number of layers of the prepreg for forming the concave portion 101 and the number of layers of the prepreg for forming the convex portion 102 may be different, it is defined in the present application that the first prepreg is laid on the groove 201, and the second prepreg is laid on the protrusion 202. When provided, the laying and lamination process for forming the concave portion 101 may be the same as part of the timing of the laying and lamination process for forming the convex portion 102. Therefore, it is described in the embodiment of the present application that laying and lamination of the concave portion 101 and the convex portion 102 are performed simultaneously.

It will be appreciated that the first and second prepregs may be the same material and the first and second prepregs may be the same sheet of prepreg.

Correspondingly, step S210 in the present application includes: a first prepreg with a preset layer number is laid on the groove 201 in a conformal manner, and a second prepreg with a preset layer number is laid on the protrusion 202 in a conformal manner. The number of layers of the first prepreg is matched with a first preset thickness of the recess 101, and the number of layers of the second prepreg is matched with a second preset thickness of the protrusion 102.

For the way in which the second prepreg laid in shape on the protrusion 202 is laminated by the second laminate 260, reference may be made to the way in which the first prepreg laid in shape on the groove 201 is laminated by the first laminate 220, which is not described in detail herein. The prepreg is laminated by the first laminate 220 and the second laminate 260 to form the blank.

In the embodiment of the present application, the first concave surface 113 and the second concave surface 114 on the concave portion 101 have the same shape, the first convex surface 115 and the second convex surface 116 on the convex portion 102 have the same shape, and the first laminate 220 and the second laminate 260 may also be used to mold the first concave surface 113 and the second convex surface 116. Specifically, the method comprises the following steps:

S500, paving a separation film on the blank. The blank formed by lamination is provided with a non-porous isolating film, so that the molding quality of the first surface 111 of the molded airborne component 100 is ensured.

S600, fixing the first laminate 220 on the blank at a position corresponding to the groove 201 on the isolating film, and forming a first cavity between the first laminate 220 and the mold body 210 for forming the concave portion 101, where a thickness of the first cavity corresponds to a first preset thickness of the concave portion 101.

On the blank, the second lamination member 260 is fixedly disposed on the isolating film at a position corresponding to the protrusion 202, and a second cavity for forming the protrusion 102 is formed between the second lamination member 260 and the mold body 210, and the thickness of the second cavity corresponds to a second preset thickness of the protrusion 102.

Similarly to the lamination process, the first limiting member 242 may be used to limit the first laminated member 220, and according to the connection mode between the first limiting member 242 and the first laminated member 220, for example, when the first limiting member 242 and the first laminated member 220 adopt a non-connection mode for limiting, the first limiting member 242 may be used to limit the upper stroke of the first laminated member 220, and the lower stroke of the first limiting member 242 may be implemented in a mode of setting a limiting block.

The limiting manner of the second limiting member 243 on the second laminate 260 is not described herein.

And S700, vacuum bags are paved on the surfaces of the blank body, the first laminated piece 220 and the second laminated piece 260, and the airborne component 100 is formed through a vacuum hot press forming process. The vacuum bag extends from the mold body 210 to the air guide assembly 270 and covers at least the air guide cavity.

Optionally, the vacuum bag may also overlie the second air guide 255. The second air guide 255 that provides in this embodiment can be through stop gear fixed setting in the position department of main part district 203, can inject the die cavity height that is used for shaping main part 103 through second air guide 255, can also realize the effect of supplementary air guide simultaneously, improves the evacuation effect.

In addition, in the present application, the vacuum pumping may be performed in a high-temperature manner in S700, and specific reference is made to S211 to S214, which are not described herein.

The vacuum degree between the vacuum bag and the mold body 210 in the vacuum hot press molding process in the present application is greater than the vacuum degree in the lamination process, and the pressure in the vacuum tank in the vacuum hot press molding process is the pressure in the vacuum tank in the lamination process.

Illustratively, evacuating through the vacuum bag, the evacuating pressure being-90 Kpa to-100 Kpa; a positive pressure of +80Kpa to +100Kpa is applied through the outside of the vacuum tank. Heating up to 125+/-10 ℃ at a heating rate of 0.5-3 ℃/min and preserving heat for 60-75 min in a vacuum tank in the curing process, continuously heating up to 175+/-5 ℃ and preserving heat for 240-255 min, continuously heating up to 200+/-5 ℃ and preserving heat for 60-75 min, continuously heating up to 230+/-5 ℃ and preserving heat for 240-255 min, then cooling down at a cooling rate lower than 1.5 ℃/min, and releasing pressure when the temperature is reduced to below 80 ℃ to finish curing. It should be noted that the process parameters are adjusted as needed in different embodiments.

The shape or size of the different surfaces of each concave portion 101 is different in order to satisfy different curved surface shape requirements. For example, to meet the mounting requirements of the first surface and the fluid management requirements of the second surface, the recesses are shaped differently on the different surfaces.

In this embodiment, the recess 101 extends in a direction from the first side edge 230 to the second side edge 240; the recess 101 includes a first curved portion and a second curved portion provided around the first curved portion, the second curved portion smoothly transitions with the main body portion 103, and the curvature of the first curved portion is smaller than that of the second curved portion.

The protrusion 102 extends along the direction from the first side edge 230 to the second side edge 240; the convex portion 102 includes a first arc portion and a second arc portion provided around the first arc portion, the second arc portion smoothly transitions with the main body portion 103, and the curvature of the first arc portion is smaller than that of the second arc portion.

In the case of laying multiple layers of the first prepreg in the grooves 201, the first concave surface 113 and the second concave surface 114 of the concave portion 101 after being formed have the same shape, and the first laminate 220 and the second laminate 260 may be used for pre-pressing during curing. A recess 101 is provided herein that forms a different concave shape. In one embodiment of the present application, the curved body 110 includes a plurality of recesses 101 arranged side by side, and a body 103 is disposed between two adjacent recesses 101; the body 103 includes a first curved surface 123 and a second curved surface 124 disposed opposite to each other.

As shown in fig. 21, the concave portion 101 includes a first concave surface 113 and a second concave surface 114 that are disposed opposite to each other, wherein the first concave surface 113 includes a first curved surface 125 and a second curved surface 126 disposed around the first curved surface 125, and the second curved surface 126 smoothly transitions between the first curved surface 123 and the first curved surface 125.

The second concave surface 114 includes a third arc surface 127 and a fourth arc surface 128 disposed around the third arc surface 127, the fourth arc surface 128 smoothly transitions between the second arc surface 124 and the third arc surface 127, and a curvature of the fourth arc surface 128 is greater than a curvature of the third arc surface 127.

The amount of curvature is set as desired in different embodiments. The inverse of the curvature is the radius of curvature, in this application, the radius of curvature of the first cambered surface 125 is the radius of arc, the radius of curvature of the second cambered surface 126 is the radius of arc, in this application, the radius of curvature of the third cambered surface 127 is the radius of arc, and the radius of curvature of the fourth cambered surface 128 is the radius of arc.

Further, the curvature of the first cambered surface 125 is equal to the curvature of the third cambered surface 127, and the curvature of the second cambered surface 126 is greater than the curvature of the fourth cambered surface 128. I.e. having different radii of curvature on different surfaces at the same location corresponding to said recess 101.

In this embodiment, the curvature of the second cambered surface 126 is greater than the curvature of the fourth cambered surface 128, so that different surfaces on the airborne component 100 have different curvature surfaces, so as to meet different structural requirements, for example, the curvature of the first curved mold portion 204 corresponding to the fourth cambered surface 128 is smaller, so that the prepreg is conveniently laid; by providing the second cambered surface 126 with a larger curvature, fluid control of the airborne component 100 on the first surface 111 is realized, and different settings can be performed according to different application scenes.

The mold body 210 includes a plurality of grooves 201 disposed side by side, and a main body region 203 between two adjacent grooves 201 corresponding to the mold body 210, where the main body region 203 includes a main body molding surface, the main body molding surface is matched with the shape of the second curved surface 124, and the main body molding surface is used for molding the second curved surface 124 of the main body portion.

With continued reference to fig. 2, the groove 201 matches the shape of the second concave surface 114, and the groove 201 includes a first curved mold portion 204 and a second curved mold portion 205 disposed around the first curved mold portion 204, where the second curved mold portion 205 smoothly transitions between the main body molding surface and the first curved mold portion 204, and the curvature of the first curved mold portion 204 is equal to the curvature of the third curved surface 127, and the curvature of the second curved mold portion 205 is equal to the curvature of the fourth curved surface 128.

With continued reference to fig. 11-12, the first laminate 220 includes a first laminate portion 221 and a first side pressure portion 222 disposed around the first laminate portion 221, the first laminate portion 221 includes a first laminate curved portion 223 and a second laminate curved portion 224 disposed around the first laminate curved portion 223, the first laminate curved portion 223 matches the shape of the first curved portion (first curved portion 204), and the second laminate curved portion 224 matches the shape of the second curved portion (second curved portion 205); the first side pressure portion 222 matches the shape of the main body region 203 of the mold body 210.

The first laminate 220 may laminate a plurality of layers of the first prepreg laid in the groove 201.

Likewise, the second laminate 260 includes a second laminate part 231 and a second side pressure part 232 disposed around the second laminate part 231, the second laminate part 231 includes a first laminate arc part 233 and a second laminate arc part 234 disposed around the first laminate arc part 233, the first laminate arc part 233 is matched with the shape of the first arc part, and the second laminate arc part 234 is matched with the shape of the second arc part; the second side pressure 232 matches the shape of the main body region 203 of the mold body 210.

In order to form the first concave surface 113 on the groove 201 and laminate and form the first concave surface 113, the present application also provides a limiting assembly, which further includes a first pre-press 280 and a second pre-press that cooperate with the lamination mechanism. The embodiment of the application is exemplified by the shape of the groove.

22-23, the shape of the first pre-press 280 matches the shape of the second concave surface 114; the first pre-pressing part 280 includes a first pre-pressing part 281 and a first side pre-pressing part 282 disposed around the first pre-pressing part 281, the first side pre-pressing part 282 matching the shape of the main body region 203;

The first pre-pressing part 281 includes a first pre-pressing curved part 283 and a second pre-pressing curved part 284 disposed around the first pre-pressing curved part 283, the curvature of the first pre-pressing curved part 283 is equal to the curvature of the first curved surface 123, and the curvature of the second pre-pressing curved part 284 is equal to the curvature of the second curved surface 124.

It should be noted that, in the embodiment of the present application, the first lamination piece 220 is similar to the first pre-lamination piece 280 and the second lamination piece 260 and the second pre-lamination piece are similar in structure, and the limiting mechanism is similar to the limiting manner of the first lamination piece 220, the second lamination piece 260, the first pre-lamination piece 280 and the second pre-lamination piece, which is not repeated herein. The first pre-pressing piece 280 and the second pre-pressing piece are also provided with air guide holes, air guide grooves and air guide plates which are communicated with the air guide assembly.

In an embodiment of the present application, a method for forming a composite airborne component 100, the method includes:

ST100, providing a forming mold 200, wherein the forming mold 200 comprises a mold body 210 and a limit component 250, at least one groove 201 and at least one protrusion 202 are arranged on the mold body 210 side by side, the groove 201 is matched with the shape of the second concave surface 114, the shape of the protrusion 202 is matched with the shape of the second convex surface 116, the limit component 250 comprises a limit mechanism, a first pre-pressing piece 280 and a second pre-pressing piece matched with the limit mechanism, the first pre-pressing piece 280 is matched with the shape of the first concave surface 113, and the second pre-pressing piece is matched with the shape of the first convex surface 115.

ST200, laying multiple layers of first prepregs on the grooves 201 in a conformal manner, and laying multiple layers of second prepregs on the protrusions 202 in a conformal manner to form a blank; the number of layers of the first prepreg is matched with the first preset thickness of the concave portion 101, and the number of layers of the second prepreg is matched with the second preset thickness of the convex portion 102.

ST300, paving a non-porous isolating film on the blank;

ST400, on the non-porous isolating membrane, adjusting the distance between the first pre-pressing piece 280 and the groove 201 through the limiting mechanism to form the groove 201 with a first preset thickness;

ST500, adjusting the distance between the second pre-pressing piece and the protrusion 202 by the limiting mechanism to form the protrusion 202 with a second preset thickness.

The arrangement of ST300 to ST500 described in the present application may refer to S500 to S600.

Wherein, in step ST200, the blank body is formed, the method further comprising:

ST210, providing a preformed prepreg block 510. As shown in fig. 25, the cross-sectional shape of the prepreg 510 is approximately triangular, the prepreg 510 includes a rounded tip 520 and an arc surface 530, the arc surface 530 matches the shape of the fourth arc surface 128, and the curvature of the arc surface 530 is equal to the curvature of the fourth arc surface 128; the rounded tip 520 is matched with the shape of the second cambered surface 126, and the curvature of the rounded tip 520 is equal to the curvature radius of the second cambered surface 126.

In this embodiment, the material of the prepreg block 510 may be the same as that of the prepreg, and the prepreg block 510 may be formed by molding a mold matching the shape thereof, or by cutting, which is not limited in this application.

The prepreg 510 further includes a first plane 540 and a second plane 550, where an included angle is formed between the first plane 540 and the second plane 550 to form the toe 520. Both ends of the arc surface 530 are respectively connected with the first plane 540 and the second plane 550.

In this embodiment of the present application, by pre-forming the prepreg 510, collapse or bridging at the position of the curved surface with large curvature in the forming process can also be avoided, stress concentration in the following-up laying process and the laminating process is reduced, and the forming quality of the concave portion 101 is improved.

ST220, after a first prepreg with a preset layer number is laid on the groove 201 in a shape-following manner, the prepreg block 510 is laid, and the circular arc surface 530 of the prepreg block 510 is attached to the position of the first prepreg with the preset layer number corresponding to the second curved mold portion 205.

It should be noted that the first prepreg with the preset layer number is the remaining first prepregs except at least one layer of the first prepregs laid later, in this embodiment of the present application, the prepreg 510 is disposed on the first prepreg near the first surface 111 for forming, for example, between the 2 nd layer prepreg and the 3 rd layer prepreg that are used for forming the outermost layer of the recess 101, which is not limited in this application, and is adjusted according to the needs in different embodiments.

ST230, continuing to lay at least one layer of the first prepreg along with the shape on the first prepreg and the prepreg block 510, and performing shape-following covering on the rounded tip 520 of the prepreg block 510 after shaping the at least one layer of the first prepreg layer by layer.

Wherein, lay the first prepreg of the preset layer number along the shape on the said recess 201, the method includes:

ST211, laying at least one layer of first prepreg along with the shape on the surface of the model body 210, wherein the first prepreg with the preset layer number at least covers the groove 201;

ST212, adjusting the first lamination 220 to be in abutting contact with the first prepreg with the preset layer number through the limit mechanism, and performing lamination operation on the first prepreg on the groove 201 through the first lamination 220;

ST213, repeating the conformal laying operation and the lamination operation until the first prepreg lamination of the preset layer number is completed.

For the laying operation and the laminating operation of the first prepreg, reference may be made to steps S200 to S500, which are not described in detail herein.

ST240, laminating the first prepreg and the prepreg block 510 laid on the groove 201 by the first prepreg 280.

Since the shape of the first laminate 220 is the same as the shape of the groove 201 (or the second curved surface 124) in this application, a first pre-pressing member 280 is provided, the shape of the first pre-pressing member 280 is the same as the shape of the first curved surface 123, and the first pre-pressing member 280 pre-presses the first curved surface 123.

It should be noted that, in the embodiment of the present application, the "lamination" is used in the non-curing process, and the prepreg is laminated by the first lamination piece 220 or the first pre-lamination piece 280, so that the prepreg at the position of the groove 201 on the mold body 210 is laminated, the shape-following laying effect of the prepreg is improved, and the curing and forming effect of the airborne component 100 is further provided.

In this embodiment, the "pre-pressing" is used in the curing process, and the first pressing piece 220 or the first pre-pressing piece 280 is pre-pressed to fill the first cavity for forming the first concave surface 113, so as to improve the forming effect of the groove 201.

In addition, the first prepreg and the prepreg 510 laid on the groove 201 are laminated by the first pre-pressing member 280, and the lamination operation may be performed by a high-temperature negative pressure mode or an external positive pressure internal negative pressure mode, which is not described herein.

In the present embodiment, the difference between the structures of the first laminate 220 and the first pre-laminate 280 is the difference in curvature between the second cambered surface 126 and the fourth cambered surface 128, and in various embodiments, the shape of the first laminate 220 is adjusted as needed.

After the lamination is finished, vacuum bags are paved on the surfaces of the blank body, the first pre-pressing piece 280 and the second pre-pressing piece, and the airborne component 100 is formed through a vacuum hot press forming process. The vacuum bag extends from the mold body 210 to the air guide assembly 270 and covers at least the air guide cavity.

The first pre-pressing piece 280 and the second pre-pressing piece in the application can be provided with an air guide groove, an air guide plate and an air guide hole, so that the air guide effect is improved. Specific process steps may refer to S700.

It is to be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are merely for convenience in describing and simplifying the description based on the orientation or positional relationship shown in the drawings, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus are not to be construed as limiting the invention.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present invention, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.

Unless defined otherwise, technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular implementations only and is not intended to be limiting of the invention. Terms such as "disposed" or the like as used herein may refer to either one element being directly attached to another element or one element being attached to another element through an intermediate member. Features described herein in one embodiment may be applied to another embodiment alone or in combination with other features unless the features are not applicable or otherwise indicated in the other embodiment.

The present invention has been described in terms of the above embodiments, but it should be understood that the above embodiments are for purposes of illustration and description only and are not intended to limit the invention to the embodiments described. Those skilled in the art will appreciate that many variations and modifications are possible in light of the teachings of the invention, which variations and modifications are within the scope of the invention as claimed.

Claims

1. The molding die for the composite material airborne component is characterized in that the airborne component comprises a curved main body, wherein at least one concave part and at least one convex part are arranged on the curved main body side by side; the mold comprises:

the limiting assembly is used for placing the first lamination piece at the position, corresponding to the groove, of the upper layer of the isolating film paved on the blank body, driving the first lamination piece to press and laminate the multiple layers of prepregs paved on the groove in a tight contact manner through the limiting mechanism, and limiting the interval between the first lamination piece and the model body through the limiting mechanism so as to form the concave part with preset thickness; the second lamination piece is arranged at the position, corresponding to the bulge, of the upper layer of the isolating film paved on the blank body, the limiting mechanism drives the second lamination piece to press and laminate the multiple layers of prepregs paved on the bulge in a tight contact manner, and the spacing between the second lamination piece and the model body is limited through the limiting mechanism so as to form the convex part with preset thickness;

The model body comprises a model middle section and two model side ends arranged at two ends of the model middle section, and the model middle section comprises a first side edge and a second side edge which are oppositely arranged along the direction of a vertical preset plane;

the first laminate includes a first laminate portion and a first side pressure portion provided around the first laminate portion, the first side pressure portion matching the shape of the main body region of the mold body;

the model body comprises a product area and a residual area, an air guide assembly surrounding the product area is arranged on the bottom plate, the air guide assembly comprises an air guide groove arranged on the bottom plate and an air guide plate covered on the air guide groove, and an air suction hole and a plurality of air guide holes which are communicated with the air guide groove are formed in the air guide plate;

in the first laminated piece, a third air guide groove communicated with the air guide groove is formed in the first side pressing part, a third air guide plate covered on the third air guide groove is further arranged on the first side pressing part, and a plurality of third air guide holes are formed in the third air guide plate.

2. The molding die of the composite airborne component according to claim 1, wherein the mold body is symmetrically arranged about a center preset plane, and a orthographic projection of the mold side end on the center preset plane gradually decreases in height from the mold middle section toward the mold side end; the height of the orthographic projection of the middle section of the model in the direction from the center to two sides of the vertical preset plane gradually decreases, and the vertical preset plane is perpendicular to the center preset plane.

3. The molding die of the composite airborne component of claim 2, wherein the curved body comprises a plurality of recesses arranged side by side, and a body portion is arranged between two adjacent recesses; the concave part extends along the direction from the first side edge to the second side edge; the concave part comprises a first curved part and a second curved part arranged around the first curved part, the second curved part is in smooth transition with the main body part, and the curvature of the first curved part is smaller than that of the second curved part;

the first lamination portion includes a first lamination curvature and a second lamination curvature disposed around the first lamination curvature, the first lamination curvature being matched to a shape of the first curvature, the second lamination curvature being matched to a shape of the second curvature.

4. A molding die for a composite airborne component as defined in claim 3, wherein the curved body includes a plurality of protrusions arranged side by side, and a body portion is arranged between two adjacent protrusions; the convex part extends along the direction from the first side edge to the second side edge; the convex part comprises a first arc part and a second arc part arranged around the first arc part, the second arc part is in smooth transition with the main body part, and the curvature of the first arc part is smaller than that of the second arc part;

5. The molding die of the composite airborne component of claim 4, wherein the airborne component comprises a side body disposed about the curved body, the side body disposed perpendicular to the central preset plane;

the product area covers part of the areas of the curved body and the side body, and the allowance area covers part of the areas of the side body;

6. The molding die of the composite airborne component of claim 5, wherein said air duct is disposed in said edge region.

7. The molding die of the composite airborne component of claim 5, wherein the limiting mechanism comprises a limiting frame detachably arranged on the bottom plate, the limiting frame is arranged in the edge area, and the limiting frame is matched with the shape of the bottom plate;

8. The molding die of the composite airborne component of claim 7, wherein the first lamination piece is provided with first pressing portions at two ends of the first lamination portion along the vertical preset plane direction, the first pressing portions are adapted to the shape of the bottom plate, and the surface of the first pressing portions, which is far from one side of the bottom plate, is in abutting contact with the first limiting piece;

9. A method for molding a composite airborne component, characterized in that a molding die of the composite airborne component as claimed in any one of claims 1 to 8 is used, the method comprising:

and forming the airborne component by a vacuum hot press forming process.

10. A composite airborne component, characterized in that it is manufactured and molded by using the molding die of the composite airborne component according to any one of claims 1 to 8.