CN117183406A - Hat-shaped rib co-curing forming structure and method suitable for large-size oil tank - Google Patents
Hat-shaped rib co-curing forming structure and method suitable for large-size oil tank Download PDFInfo
- Publication number
- CN117183406A CN117183406A CN202311401533.6A CN202311401533A CN117183406A CN 117183406 A CN117183406 A CN 117183406A CN 202311401533 A CN202311401533 A CN 202311401533A CN 117183406 A CN117183406 A CN 117183406A
- Authority
- CN
- China
- Prior art keywords
- oil tank
- hat
- cap
- shaped rib
- curing
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000000034 method Methods 0.000 title claims abstract description 13
- 238000000465 moulding Methods 0.000 claims description 21
- 239000002131 composite material Substances 0.000 claims description 10
- 239000002828 fuel tank Substances 0.000 claims description 6
- 238000005086 pumping Methods 0.000 claims description 6
- 238000003825 pressing Methods 0.000 claims description 4
- 238000010438 heat treatment Methods 0.000 claims description 3
- 210000003205 muscle Anatomy 0.000 claims description 3
- 230000003014 reinforcing effect Effects 0.000 claims description 3
- 238000007789 sealing Methods 0.000 claims description 3
- 238000007493 shaping process Methods 0.000 claims description 2
- 238000007711 solidification Methods 0.000 claims 1
- 230000008023 solidification Effects 0.000 claims 1
- 239000003921 oil Substances 0.000 description 27
- 238000013461 design Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 229920001971 elastomer Polymers 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 239000011324 bead Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012797 qualification Methods 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 229920002379 silicone rubber Polymers 0.000 description 1
- 239000004945 silicone rubber Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T50/00—Aeronautics or air transport
- Y02T50/40—Weight reduction
Abstract
The invention relates to a cap rib co-curing forming structure and method suitable for a large-size oil tank, and relates to the field of forming.
Description
Technical Field
The invention relates to the technical field of molding, in particular to a cap-shaped rib co-curing molding structure and method suitable for a large-size oil tank.
Background
The co-curing technology of the large-size complex-structure composite material oil tank is always the aim of the development work of the whole oil tank of the aircraft. The sealing of large-scale oil tank is the important difficulty of oil tank manufacturing, has directly influenced the economic cost and the life of oil tank. The integrally formed oil tank has great advantages in tightness and service life, the oil tank structure of the barrel section of the machine body and the cap-shaped ribs are ultra-long components, and the integrally co-cured forming has great technical difficulty.
Because the hat-shaped rib belongs to the hyperbolic structure, the traditional die is a die with high metal strength, so that when the cavity of the hat-shaped rib with ultra-long size and hyperbolic special-shaped change is formed, the balanced pressing of forming pressure cannot be ensured, the internal quality defect is caused, and the integral co-curing forming of the oil tank and the hat-shaped rib cannot be realized.
Therefore, in order to overcome the above drawbacks, it is desirable to provide a hat-shaped rib co-curing molding structure and method suitable for large-sized fuel tanks.
Disclosure of Invention
First, the technical problem to be solved
The invention aims to solve the technical problem that the traditional die cannot ensure uniform pressure application to the overlong cap-shaped rib, so that the quality of the formed cap-shaped rib is in high probability of being less than the standard.
(II) technical scheme
In order to solve the technical problems, the invention provides a cap-shaped rib co-curing molding structure suitable for a large-size oil tank, which comprises a bulge part and a hollow part, wherein the bulge part and the hollow part are used for molding the cap-shaped rib by an air bag with flowing gas, an AIRPAD equalizing plate is used for molding an arc surface part of the cap-shaped rib, and the cap-shaped rib and the oil tank are co-cured by a support tool of a composite material with a composite material thermal expansion coefficient of 0.
As a further explanation of the present invention, it is preferable that the hat-shaped rib has a hyperbolic structure having a length of 3m and a cross section of 30mm×50 mm.
As a further illustration of the invention, a skin is preferably laid between the equalizing plate and the cambered surface.
The invention also provides a cap-shaped rib co-curing molding method suitable for the large-size oil tank, which comprises the following steps of:
i, positioning and reinforcing a frame structural member on a supporting oil tank by adopting a supporting tool, and reserving a cap-shaped rib groove on the structural member;
II, paving the cap-shaped rib prepreg on the outer surface of the air bag to form a cap-shaped rib structure attached to the air bag, then placing the cap-shaped rib structure into the groove, vacuumizing and pre-compacting to enable the prepreg to be completely attached to the surface of the air bag, and forming a protruding part at the moment;
thirdly, paving the skin on the cambered surface part of the cap-shaped rib to be molded, positioning the equalizing plate, covering the surface of the product, and then starting to press the equalizing plate so as to mold the cambered surface part;
and IV, sending the air bags into an autoclave together with an oil tank for heating to realize co-curing, then detaching the equalizing plate and the skin, pumping out the air bags, and pumping out the air bags to finish co-curing molding.
As a further explanation of the present invention, it is preferable that the vacuum bag is integrally covered outside the pressure equalizing plate and the oil tank to seal, and the pressure equalizing plate presses the skin and the cambered surface portion by means of vacuum pumping.
As a further illustration of the present invention, it is preferred that the autoclave temperature be up to 180 ℃.
(III) beneficial effects
The technical scheme of the invention has the following advantages:
according to the invention, by adopting a composite material with a thermal expansion coefficient close to 0 as a supporting tool and combining the use of an open air bag and an AIRPAD equalizing plate, the problem that the internal quality is unqualified due to uneven molding pressure in the past is solved, so that the technical problem that the cap-shaped rib and the barrel section structure cannot be co-cured is solved.
Drawings
FIG. 1 is a front view of a tank tub of the present invention;
FIG. 2 is a front view of an open airbag of the present invention;
FIG. 3 is a front view of the equalizing plate of the present invention;
FIG. 4 is a front view of the support tooling of the present invention;
fig. 5 is a front view of the shaped hat bead of the present invention.
In the figure: 1. an air bag; 11. an air port; 2. a pressure equalizing plate; 3. hat-shaped ribs; 31. a boss; 32. an arc surface portion; 33. a hollow portion; 4. supporting the tool; 5. and an oil tank.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The utility model provides a cap muscle co-curing shaping structure suitable for jumbo size oil tank, is including inside for flowing gas's gasbag 1, adopts AIRPAD's equalizing plate 2 and adopts combined material's thermal expansion coefficient to approach the support frock 4 of 0 combined material to carry out co-curing cap muscle 3 and oil tank 5.
Referring to fig. 1 and 5, the hat-shaped rib 3 is an elongated hyperbolic structure with the total length of 3m and the cross section of only 30mm×50mm, and belongs to an ultra-long special-shaped structural member, and the structure consists of a protruding part 31 and a cambered surface part 32, wherein a hollow part 33 is arranged in the middle of the protruding part 31, a groove is arranged on the outer surface of the oil tank 5, and the cambered surface part 32 is embedded into the groove and fixedly connected with the oil tank 5.
As shown in fig. 2, the airbag 1 employs an open airbag as an inner expansion core of the convex portion 31 of the cap-shaped rib 3 to form the convex portion 31 and the hollow portion 33. The two ends of the length direction of the air bag 1 are provided with air ports 11, flowing air can be blown into the air bag 1 during forming, the internal forming air pressure and the external forming air pressure of the hat-shaped rib 3 are ensured to be the air pressure in the tank, and the problems that the rubber expansion is unstable in the past, the forming pressure of the hat-shaped rib 3 is uneven and the internal forming quality of the hat-shaped rib 3 is affected are effectively solved.
As shown in fig. 3, the equalizing plate 2 is an equalizing plate formed by molding an air pressure plate rubber through a mold, wherein the air pressure plate is a non-silicone rubber which is resistant to high temperature and does not cause silicon pollution. By adopting the equalizing plate 2 to replace the traditional vacuum bag pressing mode, as the AIRPAD equalizing plate is molded by the mold surface, the appearance precision is more fit with the product than that of the vacuum bag, and the appearance precision of the product can be effectively controlled, even if the cap-shaped rib 3 adopts the scheme of a male mold, the appearance contour can still meet the design requirement.
As shown in fig. 4, the supporting tool 4 is made of a composite material with a thermal expansion coefficient close to 0, the middle part is connected with the oil tank 5, the periphery is connected with structural members, and the structural members are connected with the equalizing plate 2 and the like. The problem of product deformation caused by insufficient strength of the product is solved, and the problems of deformation and damage of a formed product assembly in the length direction caused by mismatching of the thermal expansion coefficients of the traditional metal tool and the composite material are solved.
The invention also provides a cap-shaped rib co-curing molding method suitable for the large-size oil tank, which comprises the following steps of:
and I, positioning and reinforcing a frame structural member on the supporting oil tank 1 by adopting a supporting tool 4, and reserving a groove of the cap-shaped rib 3 on the structural member.
And II, paving the prepreg of the cap-shaped rib 3 on the outer surface of the air bag 1 to form a cap-shaped rib 3 structure attached to the air bag 1, then placing the structure into a groove, vacuumizing and pre-compacting to enable the prepreg to be completely attached to the surface of the air bag 1, and forming the convex part 31.
And III, paving the skin on the cambered surface part 32 to be formed of the cap-shaped rib 3, positioning the equalizing plate 2, covering the surface of a product, and integrally sleeving a vacuum bag outside the equalizing plate 2 and the oil tank 5 for sealing, wherein the equalizing plate 2 presses the skin and the cambered surface part 32 in a vacuumizing mode so as to form the cambered surface part 32.
And IV, sending the air bag into an autoclave together with an oil tank 5 for heating, wherein the temperature in the autoclave is 180 ℃ at the maximum to realize co-curing, then detaching the equalizing plate 2 and the skin, pumping out the air bag 1 by pumping out the air bag 1, and completing the co-curing molding.
By the method, the technical problem that the cap-shaped ribs 3 and the oil tank 5 cannot be co-cured due to uneven pressure is solved by utilizing the air bag 1 with air flowing inside, the pressure is more even by paving the skin between the equalizing plate 2 and the preformed cambered surface part 32, the surface finish degree of the formed cambered surface part 32 is higher, and the profile degree can reach about 0.2. Meanwhile, the support tool made of the composite material is matched, so that the temperature in the autoclave can reach 180 ℃, compared with the traditional method, the temperature can only reach 160 ℃ at maximum, the molding time is long, and the qualification rate is only about 85%. The co-curing molding effect of the invention is more fit with the design standard, the product percent of pass after the co-curing molding can reach 99.79%, the invention has good popularization and application value, and the invention can effectively promote the development and application of the co-curing molding of the integral large-size composite fuel tank of the composite material in the aerospace field.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and are not limiting; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.
Claims (6)
1. The utility model provides a cap muscle is solidification shaping structure altogether suitable for jumbo size oil tank which characterized in that: the novel plastic cap rib comprises a bulge part (31) and a hollow part (33) of which the inner part is a gas bag (1) for flowing gas, wherein the bulge part (31) and the hollow part (33) are used for forming the cap rib (3), an average pressing plate (2) of AIRPAD is used for forming an arc surface part (32) of the cap rib (3), and a composite material supporting tool (4) with low thermal expansion coefficient is used for co-curing the cap rib (3) and an oil tank (5).
2. The hat bar co-curing and molding structure for a large-size fuel tank of claim 1, wherein: the length of the hat-shaped rib (3) is 3m, and the cross section is a hyperbolic structure with the length of 30mm multiplied by 50 mm.
3. The hat bar co-curing and molding structure for a large-size fuel tank of claim 2, wherein: a skin is paved between the equalizing plate (2) and the cambered surface part (32).
4. A cap rib co-curing molding method suitable for a large-size oil tank according to claim 3, wherein: comprises the steps of,
i, positioning and reinforcing a frame structural member on a supporting oil tank (5) by adopting a supporting tool (4), and reserving a groove of a cap-shaped rib (3) on the structural member;
II, paving the prepreg of the hat-shaped rib (3) on the outer surface of the air bag (1) to form a hat-shaped rib (3) structure attached to the air bag (1), then placing the hat-shaped rib into a groove, vacuumizing and pre-compacting to enable the prepreg to be completely attached to the surface of the air bag (1), and forming a protruding part (31) at the moment;
thirdly, paving the skin on the cambered surface part (32) to be formed of the cap-shaped rib (3), positioning the equalizing plate (2), covering the surface of the product, and then starting to press the equalizing plate (2) so as to form the cambered surface part (32);
and IV, sending the air bag into an autoclave together with an oil tank (5) for heating to realize co-curing, then detaching the equalizing plate (2) and the skin, pumping out the air in the air bag (1) to pump out the air bag (1), and finishing co-curing molding.
5. The hat bar co-curing molding method for a large-size fuel tank of claim 4, wherein the method comprises the following steps: and a vacuum bag is integrally sleeved outside the equalizing plate (2) and the oil tank (5) for sealing, and the equalizing plate (2) is used for pressing the skin and the cambered surface part (32) in a vacuumizing mode.
6. The hat bar co-curing and forming structure and method for a large-size fuel tank of claim 5, wherein: the temperature in the autoclave is 180 ℃ at most.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311401533.6A CN117183406A (en) | 2023-10-26 | 2023-10-26 | Hat-shaped rib co-curing forming structure and method suitable for large-size oil tank |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311401533.6A CN117183406A (en) | 2023-10-26 | 2023-10-26 | Hat-shaped rib co-curing forming structure and method suitable for large-size oil tank |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117183406A true CN117183406A (en) | 2023-12-08 |
Family
ID=88998217
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311401533.6A Pending CN117183406A (en) | 2023-10-26 | 2023-10-26 | Hat-shaped rib co-curing forming structure and method suitable for large-size oil tank |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117183406A (en) |
-
2023
- 2023-10-26 CN CN202311401533.6A patent/CN117183406A/en active Pending
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