CN116749552B - A co-curing molding process for composite material U-shaped long stringer reinforced wall panels - Google Patents
A co-curing molding process for composite material U-shaped long stringer reinforced wall panelsInfo
- Publication number
- CN116749552B CN116749552B CN202310726053.0A CN202310726053A CN116749552B CN 116749552 B CN116749552 B CN 116749552B CN 202310726053 A CN202310726053 A CN 202310726053A CN 116749552 B CN116749552 B CN 116749552B
- Authority
- CN
- China
- Prior art keywords
- stringer
- paving
- skin
- composite material
- shaped
- 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.)
- Active
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
- B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
- B29C70/28—Shaping operations therefor
- B29C70/30—Shaping by lay-up, i.e. applying fibres, tape or broadsheet on a mould, former or core; Shaping by spray-up, i.e. spraying of fibres on a mould, former or core
- B29C70/34—Shaping by lay-up, i.e. applying fibres, tape or broadsheet on a mould, former or core; Shaping by spray-up, i.e. spraying of fibres on a mould, former or core and shaping or impregnating by compression, i.e. combined with compressing after the lay-up operation
- B29C70/342—Shaping by lay-up, i.e. applying fibres, tape or broadsheet on a mould, former or core; Shaping by spray-up, i.e. spraying of fibres on a mould, former or core and shaping or impregnating by compression, i.e. combined with compressing after the lay-up operation using isostatic pressure
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Composite Materials (AREA)
- Mechanical Engineering (AREA)
- Moulds, Cores, Or Mandrels (AREA)
Abstract
The invention discloses a composite material U-shaped stringer stiffening wallboard co-curing molding process which comprises the steps of S1 providing a stringer paving mold and a skin paving mold, wherein the stringer paving mold comprises a plurality of first molds and a plurality of second molds, S2 paving stringer prepregs on the first molds and the second molds, pre-compacting, taking down the prepregs paved on the second molds to obtain stringer prefabrication products, S3 paving the prepregs and adhesive films on the skin paving mold, fixing the pre-compacted first molds on the skin paving mold, reserving gaps for placing the stringer prefabrication products between the adjacent first molds, S4 placing the prefabrication products in the gaps, S5 paving vacuum auxiliary materials on the outer sides of the pre-compacted first molds and the stringer prefabrication products for bagging, curing and demolding to obtain composite material U-shaped stringer stiffening wallboard blanks, S7 machining the blanks, and forming beveled ends on the end parts of the stringer blanks to obtain composite material U-shaped stiffening wallboard.
Description
Technical Field
The invention relates to the technical field of composite material manufacturing, in particular to a co-curing molding process of a U-shaped stringer reinforced wallboard of a composite material.
Background
Common structural forms of composite stiffened wall panels include T-stringer stiffened wall panels, hat stringer stiffened wall panels, J-stringer stiffened wall panels, I-stringer stiffened wall panels, and the like. The reinforced wall plate with the structural form generally adopts a forming process such as co-cementing, secondary cementing and the like, and the integral forming of the stringer and the skin is difficult to realize. The U-shaped stringer reinforced wallboard has multiple advantages of a large number of stringers, good weight reduction effect, stable load transmission, low manufacturing cost, good stability, good fatigue resistance and the like. The co-curing integral molding process has the advantage of larger cementing area between the stringers and the wallboard, can effectively avoid the stringers from degumming and improve the structural strength. The U-shaped stringer stiffened panel prepared by the co-curing molding method provides a very critical technology for the composite material in large aircraft applications.
The prior molding technology has the defects that (1) the T-shaped rib wallboard, the cap-shaped rib wallboard, the J-shaped rib wallboard, the I-shaped rib wallboard and the like generally adopt molding processes such as co-cementing, secondary cementing and the like, but the glued part of the process scheme is easy to laminate, the structural strength is reduced, (2) the prior molding process of the U-shaped rib wallboard adopts a metal mold, the processing difficulty is high, the mold cost is high, (3) poor matching exists between the stringer mold and the skin mold, the uneven pressure transmission phenomenon is easy to cause the internal quality defect, 4) the metal mold is too many in the curing process, the temperature uniformity is poor, the temperature rising and falling speed of a composite material part is slow and is difficult to control, and the internal quality defect is easy to cause, and (5) the stringer is deviated and the size deviation can be caused due to the deformation of the mold caused by the thermal expansion system of the mold in the curing process.
Disclosure of Invention
The invention aims at solving the problems existing in the prior molding process of the reinforced wallboard of the composite material stringer, and provides a co-curing molding process of the reinforced wallboard of the composite material U-shaped stringer, which has low manufacturing cost, the composite material U-shaped stringer reinforced wallboard manufactured by the molding process has good stability and fatigue resistance, can effectively avoid the risk of stringer degumming, and improves the structural strength of products.
The invention is realized by the following technical scheme:
A co-curing molding process of a composite material U-shaped stringer stiffened wall plate is characterized in that the composite material U-shaped stringer stiffened wall plate comprises a skin and a plurality of stringers arranged on the skin;
The stringer and the skin are transited by an R angle, and the end part of the stringer is set as a bevel end;
The forming process comprises the following steps:
s1, providing a plurality of stringer paving molds and skin paving molds;
the stringer paving mould is used for paving to form a U-shaped stringer, and comprises a plurality of first moulds and a plurality of second moulds, wherein the first moulds and the second moulds are provided with structures for forming R angles;
S2, paving and pasting stringer prepregs on the first die and the second die respectively, and pre-compacting after paving and pasting, wherein the prepregs paved on the second die are taken down after pre-compacting to obtain a stringer preform with a part of U-shaped structure;
S3, paving skin prepreg on the skin paving mold, paving adhesive films on the skin prepreg, fixing a plurality of pre-compacted first molds on the paved skin paving mold according to the arrangement positions of the stringers, and reserving gaps right for placing the stringer prefabricated products between the adjacent first molds;
S4, placing the stringer preform in the gap, and filling a twisted sub-strip at an R angle between the stringer prepreg and the skin prepreg;
s5, paving a pressure pad on the surfaces of the pre-compacted first die and the stringer preform;
S6, paving a vacuum auxiliary material on the outer side of the pressure pad for making bags, solidifying and demolding to obtain a U-shaped stringer reinforced wallboard blank made of the composite material;
S7, machining the blank of the reinforced wallboard of the composite material U-shaped stringer, and forming a beveled end at the end part of the stringer to obtain the reinforced wallboard of the composite material U-shaped stringer.
Specifically, the U-shaped stringer stiffened wall panel of the composite material manufactured by the invention has the value of R angle generally between R2 and R5, the height of the stringers between 10 and 100mm and the spacing of the stringers between 100 and 500 mm.
Specifically, in the co-curing molding process of the U-shaped stringer reinforced wallboard of the composite material provided by the invention, a pressure pad (silica gel pressure pad) is laid on one side close to a vacuum bag, and is used for ensuring uniform pressure transmission and improving molding quality of the surface of a part on one side close to the bag surface.
Further, the co-curing molding process of the U-shaped stringer reinforced wallboard of the composite material comprises the step that the skin prepreg and the stringer prepreg are selected from one of carbon fiber prepreg, glass fiber prepreg or Kevlar prepreg. Wherein the prepreg can be selected from unidirectional tape, fabric or mixed ply. The twisted sliver adopts unidirectional prepreg.
Further, the co-curing molding process of the U-shaped stringer reinforced wallboard of the composite material comprises the steps that the first die is a metal material die, and the second die is a wood substitute die.
Specifically, the first die can be one of a steel die, an aluminum alloy die or an invar steel die, and the die meets the curing requirement of the composite material. The second die is a wood-substituted die with low cost, and the requirement of precompaction of the composite material is met.
Further, in the co-curing molding process of the U-shaped truss stiffened wall plate made of the composite material, the pre-compacting temperature in the step S2 is 60-80 ℃, and the pre-compacting pressure is 0.1-0.3 MPa.
Furthermore, the co-curing molding process of the U-shaped truss stiffened wall plate made of the composite material is characterized in that a laser projection positioning target is arranged on the skin paving die and used for positioning during skin prepreg paving.
Specifically, the skin prepreg can be laid manually by laser projection, or can be laid by an automatic tape laying machine or an automatic wire laying machine.
Furthermore, in the co-curing molding process of the U-shaped stringer stiffened wall plate made of the composite material, the skin paving mold is provided with a positioning pin for fixing the first mold.
Further, the co-curing molding process of the U-shaped stringer stiffened wall panel of the composite material comprises the step S6, wherein the vacuum auxiliary material comprises, but is not limited to, release cloth, isolating film, airfelt and vacuum bag.
Further, the co-curing molding process of the U-shaped stringer stiffened wall plate of the composite material comprises the following steps of curing at 120-140 ℃ and curing pressure of 0.2-0.7 MPa in the step S6.
The invention has the beneficial effects that:
(1) The composite material U-shaped stringer reinforced wallboard manufactured by the forming process has the advantages of large number of stringers, good weight reduction effect, stable load transmission, low manufacturing cost, good stability, good fatigue resistance and the like. The composite material U-shaped stringer reinforced wallboard manufactured by adopting the co-curing integral molding process has the advantage of larger cementing area between the stringer and the wallboard, can effectively avoid the problem of stringer degumming, and improves the structural strength of the obtained reinforced wallboard.
(2) In the molding process, the low-cost wood replacing die is used for replacing an expensive metal die to be used as a part of paving die, so that the manufacturing cost of the die is greatly reduced, and the production cost is reduced. The first dies (namely the metal U-shaped stringer forming dies) are arranged at intervals in the curing and forming process, so that the use of half metal dies is reduced, the manufacturing cost of the dies is reduced, and meanwhile, the problems of poor temperature uniformity, low temperature rising and reducing speed and difficult control of composite material parts and easiness in causing internal quality defects caused by excessive metal dies in the curing process are solved; the forming process of the invention improves the uniformity of the temperature field and ensures the forming quality of the product.
(3) According to the invention, the positioning accuracy of the stringer is ensured between the U-shaped stringer die (the first die) and the skin paving die through the positioning pins, and the silicone pressure pad is used in the forming process of the invention to ensure uniform pressure transmission, thereby meeting the internal forming quality of parts and improving the forming quality of the surface of a finished piece.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the description of the embodiments will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic view of a composite U-shaped stringer stiffener panel constructed in accordance with the present invention;
FIG. 2 is a schematic cross-sectional view of a composite U-stringer stiffener panel made in accordance with the present invention;
FIG. 3 is a schematic illustration of a stringer lay-up mold and a stringer prepreg lay-up used in the present invention, wherein the first mold is the same as the second mold in construction, except for the materials selected for the two;
FIG. 4 is a process flow diagram of step S3 in the co-curing process of the present invention;
FIG. 5 is a process flow diagram of steps S4-S6 in the co-curing molding process of the present invention.
The figures are marked with 1 skin, 2 stringers, 3 stringer lay-up mold, 4 skin lay-up mold, 5 gap, 6 lay-up strips, 7 pressure pad, 8 vacuum assist material, 9R angle, 10 stringer preform, 1-1 skin prepreg, 2-1 bevel end, 2-2 stringer prepreg, 3-1 first mold, 3-2 second mold.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the invention. The following description of at least one exemplary embodiment is merely exemplary in nature and is in no way intended to limit the invention, its application, or uses. 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.
In the description of the present invention, it should be understood that the terms "upper," "lower," "left," "right," "top," "bottom," and the like indicate orientations or positional relationships, merely to facilitate describing the present invention and simplify the description, and do not indicate or imply that the devices or elements being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not 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 include one or more of the feature, either explicitly or implicitly. Moreover, the terms "first," "second," and the like, are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that the embodiments of the invention described herein may be capable of operation in sequences other than those illustrated or otherwise described herein
Example 1
The co-curing molding process of the U-shaped stringer stiffened wall plate of the composite material is characterized by comprising a skin 1 and a plurality of stringers 2 arranged on the skin 1;
the stringer 2 and the skin 1 are transited by an R angle 9, and the end part of the stringer 2 is provided with a beveled end 2-1;
The forming process comprises the following steps:
S1, providing a plurality of stringer paving molds 3 and skin paving molds 4;
The stringer paving mould 3 is used for paving to form a U-shaped stringer, and comprises a plurality of first moulds 3-1 and a plurality of second moulds 3-2, wherein the second moulds 3-2 are wood-substitute moulds, and the first moulds 3-1 and the second moulds 3-2 are provided with structures for forming R angles;
s2, paving stringer prepregs 2-2 on the first die 3-1 and the second die 3-2 respectively (paving of the stringer prepregs is shown in fig. 3), and pre-compacting under the pressure of 60-80 ℃ and 0.1-0.3 MPa after paving;
S3, paving skin prepreg 1-1 on the skin paving mold 4, paving adhesive films on the skin prepreg 1-1, fixing a plurality of pre-compacted first molds 3-1 on the paved skin paving mold 4 according to the arrangement positions of the stringers 2 through positioning pins, and reserving gaps 5 (shown in fig. 4) just used for placing the stringer prefabricated products 10 between the adjacent first molds 3-1;
S4, placing the stringer preform 10 in the gap 5, and filling a twisted sub-strip 6 at an R angle between the stringer prepreg 2-2 and the skin prepreg 1-1 (shown in FIG. 5);
S5, paving a pressure pad 7 (shown in figure 5) on the surfaces of the pre-compacted first die 3-1 and the stringer preform, and ensuring uniform pressure transmission through paving the pressure pad 7 (a silica gel pressure pad), so that the forming quality of the part is improved;
S6, paving a vacuum auxiliary material 8 (the vacuum auxiliary material comprises demolding cloth, a separation film, an air felt and a vacuum bag) on the outer side of the pressure pad 7, sealing the bag, making the bag (shown in figure 5), solidifying at 120-140 ℃ and under the pressure of 0.2-0.7 MPa, demolding to obtain a U-shaped stringer reinforced wallboard blank made of the composite material, and obtaining the U-shaped stringer reinforced wallboard blank;
S7, machining the blank of the reinforced wallboard of the composite material U-shaped stringer, and forming a beveled end 2-1 at the end part of the stringer 2 to obtain the reinforced wallboard of the composite material U-shaped stringer, wherein a cross section or a layering diagram of the reinforced wallboard of the composite material U-shaped stringer is shown in fig. 2.
The forming process has low manufacturing cost, and the composite material U-shaped stringer reinforced wallboard manufactured by the forming process has good structural stability and fatigue resistance, can effectively avoid the risk of stringer degumming, and improves the structural strength of products.
The above-described preferred embodiments of the present invention are only for illustrating the present invention, and are not to be construed as limiting the present invention. Obvious changes and modifications of the invention, which are introduced by the technical solution of the present invention, are still within the scope of the present invention.
Claims (8)
1. The co-curing molding process of the composite material U-shaped stringer stiffened wall plate is characterized by comprising a skin (1) and a plurality of stringers (2) arranged on the skin (1);
The stringer (2) and the skin (1) are transited by an R angle, and the end part of the stringer (2) is provided with a bevel end (2-1);
The forming process comprises the following steps:
S1, providing a plurality of stringer paving molds (3) and skin paving molds (4);
The stringer paving mould (3) is used for paving to form a U-shaped stringer, and comprises a plurality of first moulds (3-1) and a plurality of second moulds (3-2), wherein the first moulds (3-1) and the second moulds (3-2) are provided with structures for forming R angles;
S2, paving the stringer prepregs (2-2) on the first die (3-1) and the second die (3-2) respectively, and pre-compacting after paving, and taking down the prepregs paved on the second die (3-2) after pre-compacting to obtain a stringer prefabricated product (10) with a part of U-shaped structure;
S3, paving skin prepreg (1-1) on the skin paving mold (4), paving adhesive films on the skin prepreg (1-1), fixing a plurality of pre-compacted first molds (3-1) on the skin paving mold (4) according to the setting positions of the stringers (2), and reserving gaps (5) right for placing the stringer prefabricated products (10) between the adjacent first molds (3-1);
S4, placing the stringer preform (10) in the gap (5) and filling a twisted sub-strip (6) at an R angle between the stringer prepreg (2-2) and the skin prepreg (1-1);
s5, paving a pressure pad (7) on the surfaces of the pre-compacted first die (3-1) and the stringer preform (10);
s6, paving a vacuum auxiliary material (8) on the outer side of the pressure pad (7) for making bags, solidifying and demolding to obtain a composite material U-shaped truss stiffened wall plate blank;
S7, machining the blank of the reinforced wallboard of the U-shaped stringer made of the composite material, and forming a beveled end (2-1) at the end part of the stringer (2) to obtain the reinforced wallboard of the U-shaped stringer made of the composite material.
2. The co-curing molding process of the U-shaped stringer stiffened panel of composite material according to claim 1, wherein the skin prepreg (1-1) and the stringer prepreg (2-2) are selected from one of carbon fiber prepreg, glass fiber prepreg and kevlar prepreg.
3. The co-curing molding process of the U-shaped stringer stiffened wall plate made of the composite material, which is disclosed in claim 1, is characterized in that the first mold (3-1) is a metal mold, and the second mold (3-2) is a wood substitute mold.
4. The co-curing process of the U-shaped stringer stiffened panel of composite material according to claim 1, wherein the pre-compacting temperature in the step S2 is 60-80 ℃ and the pre-compacting pressure is 0.1-0.3 MPa.
5. The co-curing molding process of the U-shaped stringer stiffened wall panel of the composite material according to claim 1, wherein the skin laying mold (4) is provided with a laser projection positioning target for positioning during skin prepreg laying.
6. The co-curing process for the U-shaped stringer stiffened wall panel of composite material according to claim 1, wherein the skin laying mold (4) is provided with positioning pins for fixing the first mold (3-1).
7. The process of co-curing a composite U-stringer stiffened panel according to claim 1, wherein the vacuum assist material of step S6 comprises a release liner, a barrier film, a airfelt, and a vacuum bag.
8. The co-curing molding process of the U-shaped stringer stiffened wall panel of composite material according to claim 1, wherein the curing temperature in the step S6 is 120-140 ℃ and the curing pressure is 0.2-0.7 MPa.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310726053.0A CN116749552B (en) | 2023-06-19 | 2023-06-19 | A co-curing molding process for composite material U-shaped long stringer reinforced wall panels |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310726053.0A CN116749552B (en) | 2023-06-19 | 2023-06-19 | A co-curing molding process for composite material U-shaped long stringer reinforced wall panels |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN116749552A CN116749552A (en) | 2023-09-15 |
| CN116749552B true CN116749552B (en) | 2025-08-22 |
Family
ID=87956678
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310726053.0A Active CN116749552B (en) | 2023-06-19 | 2023-06-19 | A co-curing molding process for composite material U-shaped long stringer reinforced wall panels |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116749552B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN119369767B (en) * | 2024-11-20 | 2025-11-21 | 沈阳飞机工业（集团）有限公司 | High-quality integrated manufacturing method for composite material skin-metal web |
| CN119238999A (en) * | 2024-12-06 | 2025-01-03 | 沈阳西子航空产业有限公司 | A co-curing molding device and method for U-shaped reinforced wall panels of composite materials with variable curvature |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111347694A (en) * | 2020-03-18 | 2020-06-30 | 广联航空工业股份有限公司 | Autoclave integral forming method for composite material ribbed wallboard with vertical ribs |
| CN114953506A (en) * | 2022-05-24 | 2022-08-30 | 上海晟纤复合材料科技有限公司 | Co-curing forming method for I-shaped reinforced wall plate made of composite material |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| ITTO20070507A1 (en) * | 2007-07-11 | 2009-01-12 | Alenia Aeronautica Spa | PROCESS OF MANUFACTURING OF A STRUCTURE OF A MONOLITHIC WING WITH AN INTEGRAL PROFILE |
| EP3205491B1 (en) * | 2016-02-09 | 2020-07-08 | Airbus Defence and Space SA | Method for manufacturing a stiffened panel made from composite material |
-
2023
- 2023-06-19 CN CN202310726053.0A patent/CN116749552B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111347694A (en) * | 2020-03-18 | 2020-06-30 | 广联航空工业股份有限公司 | Autoclave integral forming method for composite material ribbed wallboard with vertical ribs |
| CN114953506A (en) * | 2022-05-24 | 2022-08-30 | 上海晟纤复合材料科技有限公司 | Co-curing forming method for I-shaped reinforced wall plate made of composite material |
Also Published As
| Publication number | Publication date |
|---|---|
| CN116749552A (en) | 2023-09-15 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN116749552B (en) | A co-curing molding process for composite material U-shaped long stringer reinforced wall panels | |
| CN102909866A (en) | Method for forming control of long joist axial line of composite material stiffened wall panel | |
| CN104029397B (en) | The preparation facilities of a kind of technique for aircraft composite fuselage wallboard and preparation method | |
| CN106891548B (en) | Forming tool and forming method for T-shaped reinforced wallboard made of composite material | |
| CN111070724B (en) | Integral forming method of composite "U"-shaped truss wall panel and its tooling | |
| CN106079486B (en) | A kind of flexible die and preparation method thereof of forming composite stringer | |
| CN109435272B (en) | Variable-thickness composite material integral framework forming method and forming die thereof | |
| CN216636802U (en) | A hat-shaped girder wall panel, a preformed tooling structure and a co-cured encapsulation structure | |
| CN104999672A (en) | Molding method of double-curvature variable-section variable-thickness through beam | |
| CN112606270A (en) | Composite material I-beam autoclave forming die and using method thereof | |
| CN111267370A (en) | Manufacturing method of combined uniform-pressure cover plate for omega stringer stiffened composite wallboard | |
| CN211441240U (en) | Combined material "U" type stringer wallboard integrated into one piece frock | |
| CN115742370B (en) | Co-curing forming device and method for composite material I-shaped reinforced wall plate with variable-curve structure | |
| CN111645341B (en) | Method for controlling curing deformation of composite material reinforced wall plate | |
| CN206528102U (en) | A kind of T-shaped Material Stiffened Panel forming frock of composite | |
| CN112793185A (en) | A kind of co-curing molding method for T-shaped reinforced wall panel composite material | |
| CN114953505B (en) | Molding method for stringer cut-off end of composite reinforced wallboard | |
| CN115742369A (en) | Forming die and forming method for reinforcing wing ribs between composite beams | |
| CN110802851A (en) | Method for integrally forming composite material T-shaped reinforced structure product | |
| CN106926479A (en) | A kind of many beam box section co-curing forming frocks of composite | |
| CN106976252B (en) | A kind of the composite material more molding of beam box section co-curing beam mould component locating support and packaging technologies | |
| CN215359414U (en) | Carbon-fibre composite roof beam forming die | |
| CN118664931A (en) | A method and device for forming a composite material structure of a thick tube beam with a male and female mold combination | |
| CN115847898A (en) | Method for forming T-shaped reinforcing beam by soft die auxiliary thermal diaphragm | |
| CN203438435U (en) | Forming die provided with boxy reinforced structure and made of carbon fiber composite |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |