CN214926218U

CN214926218U - Forming die of wing

Info

Publication number: CN214926218U
Application number: CN202120506799.7U
Authority: CN
Inventors: 雷利彬
Original assignee: Guangzhou Leixun Innovation Technology Co ltd
Current assignee: Guangzhou Leixun Innovation Technology Co ltd
Priority date: 2021-03-10
Filing date: 2021-03-10
Publication date: 2021-11-30
Anticipated expiration: 2031-03-10

Abstract

The utility model discloses a forming die of a wing, which comprises a lower die, an upper die, a sealing cover, a sealing ring, demoulding cloth and a vacuum bag film; the lower die and the upper die are spliced and enclosed to form an inner cavity, a sealing groove is formed in the surface of the upper die opposite to the sealing cover, and the sealing cover covers the inner cavity; the shape of the inner cavity is matched with the shape of the wing to be formed, and a circle of sealing groove is arranged around the periphery of the inner cavity; the sealing cover is provided with an air nozzle interface which is communicated with two opposite surfaces of the sealing cover; the sealing ring is embedded into the sealing groove and clamped between the upper die and the sealing cover; the demoulding cloth is arranged in the inner cavity; the vacuum bag film is covered on the demoulding cloth; the scheme has low requirement on production equipment, simple manufacture, low cost and environmental protection, the manufactured wing has less post rework, good quality and high yield, and the problem of difficult manufacture of the existing wing is really solved.

Description

Forming die of wing

Technical Field

The utility model relates to a manufacturing process field of wing, in particular to forming die of wing.

Background

The carbon fiber is a new high-tech material which is widely applied to the fields of aviation, sports goods, machinery, automobiles and the like, has lighter weight than aluminum and higher strength than steel, and has a series of advantages of high specific strength, specific modulus, excellent corrosion resistance, fatigue resistance, designability and the like.

The conventional fixed wing is mainly made of composite materials, wherein carbon fibers are mostly used as main materials. Because the structure edge is thin and needs strong strength and bending resistance, the manufacturing method is also greatly limited and has high requirements. The existing popular manufacturing method mainly comprises the steps of gluing and molding the upper skin, the lower skin, the cross beam, the wing rib, the balsawood and the like, the finished product has high strength and good surface quality of carbon fiber, but the manufacturing process is troublesome, parting seams at the front edge and the rear edge of the wing are obvious after gluing, the amount of glue used is large, and the reworking is large at the later stage.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a forming die of wing to solve the problem of current wing preparation difficulty.

In order to solve the technical problem, the utility model provides a forming die of a wing, which comprises a lower die, an upper die, a sealing cover, a sealing ring, demoulding cloth and a vacuum bag film; the lower die and the upper die are spliced and enclosed to form an inner cavity, a sealing groove is formed in the surface of the upper die opposite to the sealing cover, and the sealing cover covers the inner cavity; the shape of the inner cavity is matched with the shape of the wing to be formed, and the sealing groove is arranged around the periphery of the inner cavity for a circle; the sealing cover is provided with an air nozzle interface which is communicated with two opposite surfaces of the sealing cover; the sealing ring is embedded into the sealing groove and clamped between the upper die and the sealing cover; the demolding cloth is arranged in the inner cavity; the vacuum bag film is covered on the demolding cloth.

Preferably, the thickness of the sealing ring is larger than the depth of the sealing groove by 3-5 mm.

Preferably, the shore hardness of the sealing ring is between 10 and 20 degrees.

Preferably, an edge of the vacuum bag film extends beyond the sealing groove.

Preferably, the inside of the sealing groove is a step surface, one surface of the sealing ring is step-shaped and matched with the step surface, and the vacuum bag film is clamped between the sealing ring and the sealing groove.

The utility model has the advantages as follows:

because the sealing washer embedding in the seal groove, the sealing washer centre gripping in go up the mould with between the closing cap, the drawing of patterns cloth is located the inner chamber, the vacuum bag membrane cover in on the drawing of patterns cloth, so when carrying out production, will assemble forming die places and heats on the warm table, and the warp the air cock interface is right forming die is inside aerifys the pressurization, in order to utilize vacuum bag membrane inflation compresses tightly presoaked epoxy carbon cloth can accomplish the bending of wing, so this scheme requires lowly to the equipment of production, and the preparation is simple, and is with low costs, and the environmental protection, the wing later stage reworking that makes out is few, and is of high quality, and the yields is high, has solved the problem of current wing preparation difficulty conscientiously.

Drawings

In order to more clearly illustrate the technical solution of the present invention, the drawings required for the embodiments will be briefly described below, and obviously, the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.

Fig. 1 is a perspective structural schematic view of a wing provided in an embodiment of the present invention;

FIG. 2 is a schematic bottom view of the structure of FIG. 1;

FIG. 3 is a schematic diagram of the right side view of the structure of FIG. 1;

fig. 4 is a schematic structural view of an upper mold provided in the embodiment of the present invention;

fig. 5 is a schematic view of a seal ring according to an embodiment of the present invention;

fig. 6 is a schematic side sectional view of a forming mold according to an embodiment of the present invention;

FIG. 7 is a schematic diagram of the application of FIG. 6;

FIG. 8 is a schematic view of the lower die application of FIG. 6;

fig. 9 is a schematic view of a forming die in a front cross-sectional view according to an embodiment of the present invention;

FIG. 10 is a right side balsa wood of the wing of FIG. 9;

fig. 11 is a left balsa wood of the wing of fig. 9.

The reference numbers are as follows:

10. an airfoil; 11. balsa at the left side of the wing; 12. balsa wood on the right side of the wing; 13. gluing edges of wing skins; 14. a beam groove; 15. a carbon tube positioning hole; 16. a flap hinge mounting surface; 17. a pressure spring mounting surface;

21. a lower die; 22. an upper die; 23. sealing the cover; 24. an inner cavity; 25. a sealing groove; 26. an air nozzle interface;

30. a seal ring;

41. pre-dipping epoxy resin carbon cloth; 42. demolding the cloth; 43. and (5) vacuum bag film.

Detailed Description

The technical solution of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings.

The utility model provides a forming die of a wing, the embodiment of which is shown in figures 1 to 11 and comprises a lower die, an upper die, a sealing cover, a sealing ring, demoulding cloth and a vacuum bag film; the lower die and the upper die are spliced and enclosed to form an inner cavity, a sealing groove is formed in the surface of the upper die opposite to the sealing cover, and the sealing cover covers the inner cavity; the shape of the inner cavity is matched with the shape of the wing to be formed, and the sealing groove is arranged around the periphery of the inner cavity for a circle; the sealing cover is provided with an air nozzle interface which is communicated with two opposite surfaces of the sealing cover; the sealing ring is embedded into the sealing groove and clamped between the upper die and the sealing cover; the demolding cloth is arranged in the inner cavity; the vacuum bag film is covered on the demolding cloth.

The specific application mode comprises the following steps:

step S1, manufacturing a forming die according to the shape of the wing 10 to be formed, wherein the forming die comprises a lower die 21, an upper die 22 and a sealing cover 23, the lower die 21 and the upper die 22 are spliced and enclosed to form an inner cavity 24, a sealing groove 25 is formed in the surface of the upper die 22 opposite to the sealing cover 23, and the sealing cover 23 covers the inner cavity 24; the shape of the inner cavity 24 is matched with the shape of the wing 10 to be molded, and a circle of sealing groove 25 is arranged around the periphery of the inner cavity 24; the sealing cover 23 is provided with an air nozzle connector 26, and the air nozzle connector 26 is communicated with two opposite surfaces of the sealing cover 23;

step S2, manufacturing the seal ring 30 according to the shape of the seal groove 25;

step S3, coating a release agent in an inner cavity 24, respectively sticking pre-impregnated epoxy resin carbon cloth 41 in a lower die 21 and an upper die 22, extending the pre-impregnated epoxy resin carbon cloth 41 on the lower die 21 to the outside of a space surrounded by the lower die 21, closing the lower die 21 and the upper die 22, then sticking the pre-impregnated epoxy resin carbon cloth 41 on the surface of the inner cavity 24, respectively arranging a left-side balsawood 11 of the wing and a right-side balsawood 12 of the wing at the positions of the left side and the right side of a formed wing 10 of the inner cavity 24, so that the pre-impregnated epoxy resin carbon cloth 41 is stuck on the left-side balsawood 11 of the wing and the right-side balsawood 12 of the wing, and finally sequentially sticking a release cloth 42 and a vacuum bag film 43; with reference to the direction shown in fig. 8, the epoxy resin pre-impregnated carbon cloth 41 covers the inner surface of the lower mold 21 completely, and sufficient length is reserved on the left and right sides of the epoxy resin pre-impregnated carbon cloth 41 so that the epoxy resin pre-impregnated carbon cloth 41 of the lower mold 21 and the upper mold 22 are pre-bonded; note that, during mold clamping, the prepreg epoxy carbon cloth 41 on the upper and lower edges is sandwiched between the lower mold 21 and the upper mold 22, and after mold clamping, the prepreg epoxy carbon cloth 41 on the upper and lower edges of the lower mold 21, which is left in advance, should be manually adhered to the inner wall of the upper mold 21.

Step S4, inserting the seal ring 30 into the seal groove 25, and pressing the seal ring 30 with the seal cover 23;

step S5, placing the assembled forming die on a heating table for heating, and inflating and pressurizing the inside of the forming die through the air nozzle interface 26 so as to utilize the vacuum bag film 43 to expand and compact the pre-impregnated epoxy resin carbon cloth 41;

step S6, completing the molding process, and taking out the airfoil 10 molded by the epoxy resin-prepreg carbon cloth 41 from the molding die.

Compared with the existing wing forming method, the method has the advantages of low requirement on production equipment, simple manufacturing, low cost, environmental protection, less reworking of the manufactured wing 10 at the later stage, good quality and high yield, and the problem that the existing wing 10 is difficult to manufacture is really solved.

After the wing 10 is manufactured by adopting the above method, the wing 10 is of a semi-open structure, and the wing ribs, the wing spars and the skin can be automatically added in the later period, as shown in fig. 1 to 3, at this time, the wing 10 is preset with the wing skin glue joint edge 13 at the opening, the outer sides of the inner sides of the wings 10 are all provided with the beam grooves 14, the inner sides are provided with the carbon tube positioning holes 15 capable of being assembled with the fuselage, the upper surface of the wing 10 is reserved with the flap hinge mounting surface 16, and the inner side edge of the bottom of the wing 10 is reserved with the pressure spring mounting surface 17 buckled with the fuselage, thereby showing that the wing 10 manufactured by the above method is very convenient to process and maintain in the later period, and the use effect is far superior to the existing wing manufacturing process.

Preferably, in step S2, the thickness of the seal ring 30 is greater than the depth of the seal groove 25 by 3 to 5mm, and when this arrangement is adopted, the seal ring 30 can be stably clamped between the cover 23 and the upper die 22, wherein the cover 23 and the upper die 22 can be screwed and fixed by bolts.

Preferably, in step S2, a proper amount of silica gel raw material is prepared, then the silica gel raw material is poured into the mold and filled, the mold is placed on a heating table for heating and vulcanizing, and the mold is removed after cooling and trimming is performed to obtain the sealing ring 30, so that the quality of the sealing ring 30 can be ensured, and an important guarantee is provided for airtightness in the production process.

Preferably, in step S2, the shore hardness of the sealing ring 30 is set to be between 10 degrees and 20 degrees, and after the setting mode is adopted, the hardness and the deformation capability of the sealing ring 30 can be ensured, so that an important guarantee is provided for the sealing performance in the manufacturing process.

Preferably, in step S5, the heating is performed at a temperature of 140 to 180 ℃; with this arrangement, the temperature can be kept appropriate, thereby facilitating the production of a wing 10 of good quality.

Preferably, in step S5, the pressure for inflation is between 0.4MPa and 0.8 MPa; with this arrangement, the correct air pressure can be ensured to produce a wing 10 of good quality.

Preferably, in step S6, the forming mold is water-cooled, and the formed wing 10 is taken out after demolding in water; after the operation mode is adopted, the difficulty in removing the wing 10 is reduced, so that the wing 10 is convenient to remove.

Preferably, in step S3, the edge of the vacuum bag film 43 extends beyond the sealing groove 25, and the vacuum bag film 43 covers the entire surface of the release fabric 42 by extending the coverage of the vacuum bag film 43, and the vacuum bag film 43 is preferably set to exceed the width of the sealing groove 25 by more than twice, and the vacuum bag film 43 has enough area to sufficiently press the release fabric 42 after inflation and pressurization.

Preferably, in step S3, the inner cavity 24 is formed at the corresponding positions of the left-side balsa 11 and the right-side balsa 12 by first joining the pre-impregnated epoxy resin carbon cloth 41 on the upper die 22 and the lower die 21, and then arranging the left-side balsa 11 and the right-side balsa 12.

Referring to the direction shown in fig. 9, the prepreg epoxy resin carbon cloth 41 on the lower die 21 and the upper die 22 is pre-bonded and adhered to the left balsa 11 and the right balsa 12 of the wing; it should be noted that the positioning and molding of the prepreg epoxy carbon cloth 41 are simplified due to the arrangement of the left-side balsa 11 and the right-side balsa 12 of the wing, and the phenomenon of fracture and separation at the joint of the upper die 22 and the lower die 21 can also be avoided by first joining the prepreg epoxy carbon cloth 41 on the upper die 22 and the lower die 21.

Preferably, the inside of the sealing groove 25 is a step surface, one surface of the sealing ring 30 is step-shaped and matched with the step surface, and the vacuum bag film 43 is clamped between the sealing ring 30 and the sealing groove 25, so that after the arrangement mode is adopted, the clamping firmness of the sealing ring 30 and the sealing groove 25 to the vacuum bag film 43 is improved.

The foregoing is a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of improvements and decorations can be made without departing from the principle of the present invention, and these improvements and decorations are also considered as the protection scope of the present invention.

Claims

1. A forming die for wings is characterized in that,

comprises a lower die, an upper die, a sealing cover, a sealing ring, demoulding cloth and a vacuum bag film;

the lower die and the upper die are spliced and enclosed to form an inner cavity, a sealing groove is formed in the surface of the upper die opposite to the sealing cover, and the sealing cover covers the inner cavity;

the shape of the inner cavity is matched with the shape of the wing to be formed, and the sealing groove is arranged around the periphery of the inner cavity for a circle;

the sealing cover is provided with an air nozzle interface which is communicated with two opposite surfaces of the sealing cover;

the sealing ring is embedded into the sealing groove and clamped between the upper die and the sealing cover;

the demolding cloth is arranged in the inner cavity;

the vacuum bag film is covered on the demolding cloth.

2. The molding die of claim 1, wherein the thickness of the sealing ring is 3-5 mm greater than the depth of the sealing groove.

3. The molding die of claim 1, wherein the seal ring has a shore hardness of between 10 degrees and 20 degrees.

4. The molding die of claim 1, wherein an edge of the vacuum bag film extends beyond the sealing groove.

5. The molding die of claim 4, wherein the sealing groove has a stepped surface inside, one surface of the sealing ring has a stepped shape matching the stepped surface, and the vacuum bag film is clamped between the sealing ring and the sealing groove.