CN113772076A - Foam sandwich hat-shaped reinforced wall plate structure and integrated forming method - Google Patents
Foam sandwich hat-shaped reinforced wall plate structure and integrated forming method Download PDFInfo
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- CN113772076A CN113772076A CN202110973262.6A CN202110973262A CN113772076A CN 113772076 A CN113772076 A CN 113772076A CN 202110973262 A CN202110973262 A CN 202110973262A CN 113772076 A CN113772076 A CN 113772076A
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- 239000006260 foam Substances 0.000 title claims abstract description 98
- 238000000034 method Methods 0.000 title claims abstract description 51
- 229920005989 resin Polymers 0.000 claims abstract description 46
- 239000011347 resin Substances 0.000 claims abstract description 46
- 239000011162 core material Substances 0.000 claims abstract description 29
- 239000004744 fabric Substances 0.000 claims abstract description 29
- 239000000463 material Substances 0.000 claims abstract description 27
- 239000003795 chemical substances by application Substances 0.000 claims description 21
- 238000011068 loading method Methods 0.000 claims description 15
- 238000004513 sizing Methods 0.000 claims description 10
- 229920001971 elastomer Polymers 0.000 claims description 9
- 238000005086 pumping Methods 0.000 claims description 9
- 230000002787 reinforcement Effects 0.000 claims description 9
- 238000005470 impregnation Methods 0.000 claims description 7
- 238000000465 moulding Methods 0.000 claims description 6
- 239000003292 glue Substances 0.000 claims description 5
- 239000007788 liquid Substances 0.000 claims description 5
- 230000000149 penetrating effect Effects 0.000 claims description 5
- XQUPVDVFXZDTLT-UHFFFAOYSA-N 1-[4-[[4-(2,5-dioxopyrrol-1-yl)phenyl]methyl]phenyl]pyrrole-2,5-dione Chemical compound O=C1C=CC(=O)N1C(C=C1)=CC=C1CC1=CC=C(N2C(C=CC2=O)=O)C=C1 XQUPVDVFXZDTLT-UHFFFAOYSA-N 0.000 claims description 3
- WOCGGVRGNIEDSZ-UHFFFAOYSA-N 4-[2-(4-hydroxy-3-prop-2-enylphenyl)propan-2-yl]-2-prop-2-enylphenol Chemical compound C=1C=C(O)C(CC=C)=CC=1C(C)(C)C1=CC=C(O)C(CC=C)=C1 WOCGGVRGNIEDSZ-UHFFFAOYSA-N 0.000 claims description 3
- 229920000049 Carbon (fiber) Polymers 0.000 claims description 3
- 229920000459 Nitrile rubber Polymers 0.000 claims description 3
- 229920005830 Polyurethane Foam Polymers 0.000 claims description 3
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 claims description 3
- 229920006231 aramid fiber Polymers 0.000 claims description 3
- 239000004917 carbon fiber Substances 0.000 claims description 3
- 238000001514 detection method Methods 0.000 claims description 3
- 239000003822 epoxy resin Substances 0.000 claims description 3
- 239000000835 fiber Substances 0.000 claims description 3
- 239000003365 glass fiber Substances 0.000 claims description 3
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 3
- 239000004843 novolac epoxy resin Substances 0.000 claims description 3
- 229920003192 poly(bis maleimide) Polymers 0.000 claims description 3
- 229920006122 polyamide resin Polymers 0.000 claims description 3
- 229920000647 polyepoxide Polymers 0.000 claims description 3
- 229920007790 polymethacrylimide foam Polymers 0.000 claims description 3
- 239000011496 polyurethane foam Substances 0.000 claims description 3
- 229920000915 polyvinyl chloride Polymers 0.000 claims description 3
- 239000004800 polyvinyl chloride Substances 0.000 claims description 3
- 239000000843 powder Substances 0.000 claims description 3
- 238000002360 preparation method Methods 0.000 claims description 3
- 238000007789 sealing Methods 0.000 claims description 3
- 229920006305 unsaturated polyester Polymers 0.000 claims description 3
- 238000009755 vacuum infusion Methods 0.000 claims description 3
- 210000003205 muscle Anatomy 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 15
- 239000002131 composite material Substances 0.000 abstract description 7
- 238000009958 sewing Methods 0.000 description 5
- 238000004026 adhesive bonding Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 239000011148 porous material Substances 0.000 description 3
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000011074 autoclave method Methods 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000001802 infusion Methods 0.000 description 1
- 230000008093 supporting effect Effects 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 239000013585 weight reducing agent Substances 0.000 description 1
- 230000037303 wrinkles Effects 0.000 description 1
Images
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B64—AIRCRAFT; AVIATION; COSMONAUTICS
- B64C—AEROPLANES; HELICOPTERS
- B64C1/00—Fuselages; Constructional features common to fuselages, wings, stabilising surfaces or the like
- B64C1/06—Frames; Stringers; Longerons ; Fuselage sections
- B64C1/12—Construction or attachment of skin panels
-
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B64—AIRCRAFT; AVIATION; COSMONAUTICS
- B64C—AEROPLANES; HELICOPTERS
- B64C1/00—Fuselages; Constructional features common to fuselages, wings, stabilising surfaces or the like
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2031/00—Other particular articles
- B29L2031/30—Vehicles, e.g. ships or aircraft, or body parts thereof
- B29L2031/3076—Aircrafts
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B64—AIRCRAFT; AVIATION; COSMONAUTICS
- B64C—AEROPLANES; HELICOPTERS
- B64C1/00—Fuselages; Constructional features common to fuselages, wings, stabilising surfaces or the like
- B64C2001/0054—Fuselage structures substantially made from particular materials
- B64C2001/0072—Fuselage structures substantially made from particular materials from composite materials
-
- 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
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Aviation & Aerospace Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Composite Materials (AREA)
- Laminated Bodies (AREA)
Abstract
The invention discloses a foam sandwich hat-shaped stiffened wall plate structure and an integrated forming method, and belongs to the technical field of composite material manufacturing. The method comprises the steps of paving and assembling a dry fabric, a trapezoidal foam sandwich which is grooved and punched in advance and a one-way filling core material on a skin female die tool, preparing an assembled prefabricated body, and then realizing a process method for integrally impregnating and curing the prefabricated body through a vacuum resin flow guide process, so that the interface between the skin and the foam sandwich is completely filled with impregnating resin, flow guide holes formed in the foam sandwich are also filled with resin to form resin columns, the resin columns uniformly distributed in the foam sandwich improve the pressure resistance of the foam sandwich material, and the resin columns, the skin and the core material penetrate through the resin columns, so that the bonding strength between the skin and the core material is also improved. The manufacturing period and cost of the hat-shaped stiffened wall panel can be obviously reduced.
Description
Technical Field
The invention relates to the technical field of composite material manufacturing, in particular to a foam sandwich hat-shaped reinforced wall plate structure and an integrated forming method.
Background
The composite material hat-shaped reinforced wall plate structure is widely applied to aviation structures, particularly the first choice of tubular structural components such as the fuselage sections of large-scale passenger commercial airplanes and the like due to the advantages of good post-buckling bearing capacity, high specific stiffness, good structural stability, high circumferential load transfer efficiency and good weight reduction effect. However, a long and narrow cavity structure can be formed between the conventional hat-shaped rib and the skin, a rubber expansion soft mold is needed to provide the molding pressure in the cavity in the molding process, a large amount of extra time is often needed for manufacturing the soft mold, the manufacturing cost and the period of the reinforced wall plate are improved invisibly, and the quality problems of wrinkles, looseness and the like easily occur at the R area of the inner cavity.
In recent years, the foam core is adopted to fill the cavity area of the cap-shaped rib, a similar supporting effect can be achieved in the forming process, and the whole wallboard forms a sandwich structure consisting of the upper wallboard, the lower wallboard and the sandwich core in the cavity area after the foam core is formed, so that the bending rigidity and the structural efficiency of the structure can be improved, the use of a soft mold is eliminated, and the manufacturing efficiency and the product quality are improved to a certain extent. However, the prepreg-autoclave method is still required for molding, and the lower skin, the ribs and the upper skin are molded in a gluing method in the manufacturing process, so that the manufacturing cost is still high, and the problems of debonding or layering and the like between the panel and the foam sandwich material are easily caused due to the weak bonding force between the foam core material and the panel material.
In the prior art, a conventional gluing process is generally adopted for bonding a foam core material and a panel material, but the panel and a foam sandwich in a bonded structure are easy to be debonded, and methods such as sewing and Z-Pin are also adopted, for example, a sewing technology enhanced foam sandwich hat-type stiffened wall plate structure and a forming method thereof provided by patent CN104554701B can improve the strength, rigidity and stability of the composite hat-type stiffened wall plate structure, but the method can also cause additional damage to the in-plane performance of the panel.
Disclosure of Invention
The invention aims to solve the problems that the foam sandwich hat type reinforced wall plate structure in the prior art has more forming steps and the panel and the foam sandwich in the structure are easy to be debonded, provides an integrated forming process method which is different from the conventional gluing process and does not need to additionally damage the in-plane performance of the panel through sewing, Z-Pin and the like, and also provides a foam sandwich hat type reinforced wall plate structure.
In order to achieve the above object, the technical solution of the present invention is as follows:
the utility model provides a foam core hat type adds muscle wallboard structure which characterized in that: the composite material comprises an upper skin, a lower skin, a foam sandwich and an R area filling core material; a plurality of criss-cross grooves are uniformly distributed on the contact surface of the foam sandwich and the upper skin, vertical flow guide holes which vertically penetrate through the foam sandwich are formed in the criss-cross positions of the grooves, resin is filled in the grooves and the flow guide holes of the foam sandwich to form resin columns, the resin columns penetrate through the upper surface and the lower surface of the foam sandwich in the thickness direction of the foam sandwich, and the foam sandwich, the upper skin, the lower skin and the resin columns are of an integrally formed structure.
Furthermore, the distance between the grooves on the foam sandwich and the distance between the flow guide holes are 10-30 mm, the width of the grooves is 2-4 mm, and the depth of the grooves is 2-4 mm.
The invention also provides an integrated forming method of the foam sandwich hat type reinforced wall plate structure, which is characterized by comprising the following steps:
the method comprises the following steps that firstly, grooves are formed in the upper surface of the foam sandwich to form a plurality of criss-cross grooves, and diversion holes which vertically penetrate through the upper surface and the lower surface of the foam sandwich are formed in the staggered positions of the grooves;
laying the reinforcement material treated by the setting agent on a forming tool, and pre-pumping to complete laying of the lower skin;
positioning the slotted and open-cell foam sandwich on the laid lower skin through a setting agent, and pre-pumping to well fix the foam sandwich and the lower skin;
fourthly, using a setting agent loaded fabric to lay an upper skin, and performing pre-pumping after the upper skin is laid to compact the prefabricated body;
fifthly, continuously laying auxiliary materials such as strippable cloth, a rubber inlet pipe, a rubber outlet pipe, a flow guide net, a vacuum bag and the like on the prefabricated body;
step six, vacuum bag sealing and leakage detection are carried out, and the vacuum degree is guaranteed not to be reduced to be less than 0.05 bar within 5 min;
seventhly, carrying out resin glue preparation and defoaming treatment;
step eight, vacuum infusion: sucking resin into the prefabricated body through vacuum, and simultaneously realizing integral impregnation of the upper skin, the lower skin and the foam sandwich;
and step nine, curing the part according to the technical specification of the resin material after the impregnation is finished, and demolding.
Furthermore, the reinforcement material is selected from one or more of carbon fiber, glass fiber and aramid fiber.
Further, the reinforcement material is a continuous fiber dry fabric, and comprises one or more of a unidirectional fabric, a plain fabric, a twill fabric and a satin fabric.
Further, the main component of the sizing agent is one or more of unsaturated polyester, epoxy resin, novolac epoxy resin, bismaleimide phenyl methane, diallyl bisphenol A, polyamide resin and carboxyl-terminated liquid nitrile rubber.
Furthermore, the loading mode of the sizing agent loading fabric is one or more of powder loading, solution loading and resin film loading methods.
Further, the mass fraction of the sizing agent in the sizing agent loaded fabric is 3-10%.
Furthermore, the material of the foam sandwich is one or more of polymethacrylimide foam, polyurethane foam and polyvinyl chloride foam.
Furthermore, the density of the material of the foam sandwich is 50-130 kg/m 3.
In summary, the invention has the following advantages:
1. by the process method, the interface between the skin and the foam sandwich is completely filled with the impregnating resin, and the pore passages formed in the foam sandwich are also filled with the resin to form the resin columns, the resin columns uniformly distributed in the foam sandwich improve the compression resistance of the foam sandwich material, and the resin penetrating through the resin columns and the skin and the core material also improves the bonding strength between the skin and the core material;
2. the integrated forming method of the invention not only avoids the problems of poor matching degree of a glue film and a bonding surface, complex manufacturing process, easy debonding of a plate core and the like caused by a secondary bonding process used in the cap-shaped reinforced wall plate manufacturing process, but also avoids the problem of reduction of mechanical properties of the skin caused by a process method of connecting a foam sandwich and the skin by sewing or a Z-PIN process for preforming, and can obviously reduce the manufacturing period and cost of the cap-shaped reinforced wall plate;
3. liquid molding is a representative of non-autoclave molding processes and has the characteristics of low cost and high efficiency. The low-cost liquid forming technology represented by vacuum-assisted resin infusion can realize the integrated forming of the foam sandwich composite material, avoids high-cost and complicated process procedures such as curing of a skin autoclave on prepreg, secondary bonding and the like, and is a low-cost composite material manufacturing technology with great development potential.
Drawings
FIG. 1 is a schematic longitudinal sectional view of a foam sandwich hat-type stiffened wall panel of the present invention;
FIG. 2 is a schematic view of an integrated forming process of the foam sandwich hat-shaped stiffened wall panel of the present invention;
in the figure:
1. the method comprises the following steps of lower covering, 2, upper covering, 3, foam sandwich, 4, R area filling core materials, 5, flow guide holes, 6, grooves, 7, rubber inlet pipes, 8, rubber outlet pipes, 9, flow guide nets, 10 and a vacuum bag.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
In the description of the present invention, it should be noted that the terms "upper", "vertical", "inside", "outside", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, or orientations or positional relationships that are conventionally arranged when the products of the present invention are used, or orientations or positional relationships that are conventionally understood by those skilled in the art, and are used for convenience of description and simplification of description, but do not indicate or imply that the devices or elements that are referred to must have specific orientations, be constructed in specific orientations, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like are used merely to distinguish one description from another, and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," and "connected" are to be construed broadly, e.g., as meaning fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Example 1
The embodiment provides a foam sandwich hat type stiffened wall panel structure, which comprises an upper skin 2, a lower skin 1, a foam sandwich 3 and an R area filling core material 4. As shown in fig. 1, in the present embodiment, the shape of the foam core 3 is an isosceles trapezoid, which matches the internal shape of the hat-shaped stiffened wall panel, a plurality of criss-cross grooves 6 are uniformly distributed on the surface of the foam core 3 contacting the upper skin 2, vertical flow guide holes 5 vertically penetrating through the foam core 3 are formed at criss-cross positions of the grooves 6, resin is filled in the grooves 6 and the flow guide holes 5 of the foam core 3 to form resin columns, the resin columns are parallel to the thickness direction of the foam core 3, the resin columns penetrate through the upper and lower surfaces of the foam core 3 along the thickness direction of the foam core 3, and the hat-shaped ribs of the core 3, the upper skin 2, the lower skin 1 and the resin columns are integrally formed.
Preferably, the distance between the grooves 6 and the distance between the holes on the foam sandwich 3 are within the range of 10-30 mm, the width of the grooves 6 is within the range of 2-4 mm, and the depth of the grooves 6 is within the range of 2-4 mm.
Example 2
On the basis of embodiment 1, the embodiment discloses an integrated forming method of a foam sandwich hat type reinforced wall plate structure, which comprises the following steps:
step one, grooving and opening treatment are carried out on the upper surface of an isosceles trapezoid foam sandwich 3, a plurality of criss-cross grooves 6 are formed on the upper surface of the foam sandwich 3, and diversion holes 5 vertically penetrating through the upper surface and the lower surface of the foam sandwich 3 are formed in the staggered positions of the grooves 6;
laying the reinforcement material treated by the setting agent on a forming tool, and pre-pumping to complete laying of the lower skin 1;
positioning the slotted and open-pore foam sandwich 3 on the laid lower skin 1 through a setting agent in a laser projection mode, and pre-drawing to well fix the foam sandwich 3 and the lower skin 1;
fourthly, using a setting agent loaded fabric to lay the upper skin 2, and pre-pumping to compact the prefabricated body after the upper skin 2 is laid; in the second step to the fourth step, the pre-pumping is carried out once when one laying step is finished, so that the effect of compacting the prefabricated body can be achieved, and the defects of folds and the like after forming are prevented.
Fifthly, continuously laying auxiliary materials such as strippable cloth, a rubber inlet pipe 7, a rubber outlet pipe 8, a flow guide net 9, a vacuum bag 10 and the like on the prefabricated body, as shown in figure 2;
step six, vacuum bag sealing and leakage detection are carried out, and the vacuum degree is guaranteed not to be reduced to be less than 0.05 bar within 5 min;
seventhly, carrying out resin glue preparation and defoaming treatment;
step eight, vacuum infusion: sucking resin into the prefabricated body through vacuum, and simultaneously realizing integral impregnation of the upper skin 2, the lower skin 1 and the foam sandwich 3;
and step nine, curing the part according to the technical specification of the resin material after the impregnation is finished, and demolding.
Example 3
On the basis of embodiment 2, the embodiment discloses an integrated forming method of a foam sandwich hat type reinforced wall plate structure, and preferably, the reinforcement material is one or more of carbon fiber, glass fiber and aramid fiber.
Preferably, the reinforcement material is a continuous fiber dry fabric, and comprises one or more of a unidirectional fabric, a plain fabric, a twill fabric and a satin fabric.
Preferably, the main component of the setting agent used in the forming process is one or more of unsaturated polyester, epoxy resin, novolac epoxy resin, bismaleimide phenyl methane, diallyl bisphenol A, polyamide resin and carboxyl-terminated liquid nitrile rubber.
Preferably, the loading mode of the sizing agent loading fabric is one or more of powder loading, solution loading and resin film loading methods.
Preferably, the mass fraction of the sizing agent in the sizing agent loaded fabric is 3-10%.
Preferably, the material of the foam sandwich 3 is one or more of polymethacrylimide foam, polyurethane foam and polyvinyl chloride foam.
Preferably, the density of the foam sandwich 3 material is 50-130 kg/m 3.
According to the invention, the dry fabric, the trapezoidal foam sandwich which is grooved and perforated in advance and the unidirectional filling core material are paved and assembled on the skin female die tool, so that an assembled prefabricated body is prepared, and then the integrated impregnation and curing of the prefabricated body are realized through a vacuum resin diversion process.
By the process method, the interface between the skin and the foam sandwich is completely filled with the impregnating resin, and the pore channels formed in the foam sandwich are also filled with the resin to form the resin columns, so that the resin columns uniformly distributed in the foam sandwich improve the compression resistance of the foam sandwich material, and the resin penetrating through the resin columns and the skin and the core material also improves the bonding strength between the skin and the core material.
The integrated forming method avoids the problems of poor matching degree of a glue film and a bonding surface, complex manufacturing process, easy debonding of a plate core and the like caused by a secondary bonding process used in the conventional manufacturing process of the hat-shaped reinforced wall plate, and does not have the problem of reduction of mechanical properties of the skin caused by a process method of connecting a foam sandwich with the skin by sewing or a Z-PIN process for preforming, and can obviously reduce the manufacturing period and the cost of the hat-shaped reinforced wall plate.
While the present invention has been described in detail with reference to the illustrated embodiments, it should not be construed as limited to the scope of the present patent. Various modifications and changes may be made by those skilled in the art without inventive step within the scope of the appended claims.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in any way, and all simple modifications and equivalent variations of the above embodiments according to the technical spirit of the present invention are included in the scope of the present invention.
Claims (10)
1. The utility model provides a foam core hat type adds muscle wallboard structure which characterized in that: comprises an upper skin (2), a lower skin (1), a foam sandwich (3) and a R area filling core material (4); a plurality of criss-cross grooves (6) are uniformly distributed on the surface of the foam sandwich (3) in contact with the upper skin (2), vertical flow guide holes (5) which vertically penetrate through the foam sandwich (3) are formed in criss-cross positions of the grooves (6), resin is filled in the grooves (6) and the flow guide holes (5) of the foam sandwich (3) to form resin columns, the resin columns penetrate through the upper surface and the lower surface of the foam sandwich (3) along the thickness direction of the foam sandwich (3), and the foam sandwich (3), the upper skin (2), the lower skin (1) and the resin columns are of an integrally formed structure.
2. The foam sandwich hat type stiffened wall panel structure of claim 1, wherein the distance between the grooves (6) and the distance between the diversion holes (5) on the foam sandwich (3) are 10-30 mm, the width of the grooves (6) is 2-4 mm, and the depth of the grooves (6) is 2-4 mm.
3. An integrated forming method of a foam sandwich hat-shaped reinforced wall plate structure is characterized by comprising the following steps:
firstly, grooving the upper surface of the foam sandwich (3) to form a plurality of criss-cross grooves (6), and arranging guide holes (5) vertically penetrating through the upper surface and the lower surface of the foam sandwich (3) at the staggered positions of the grooves (6);
laying the reinforcement material treated by the setting agent on a forming tool, and pre-pumping to finish laying the lower skin (1);
positioning the slotted and open-cell foam sandwich (3) on the laid lower skin (1) through a setting agent, and pre-pumping to well fix the foam sandwich (3) and the lower skin (1);
fourthly, using a setting agent loaded fabric to lay the upper skin (2), and pre-pumping to compact the prefabricated body after the upper skin (2) is laid;
fifthly, continuously laying auxiliary materials such as strippable cloth, a rubber inlet pipe (7), a rubber outlet pipe (8), a flow guide net (9), a vacuum bag (10) and the like on the prefabricated body;
step six, vacuum bag sealing and leakage detection are carried out, and the vacuum degree is guaranteed not to be reduced to be less than 0.05 bar within 5 min;
seventhly, carrying out resin glue preparation and defoaming treatment;
step eight, vacuum infusion: sucking resin into the prefabricated body through vacuum, and simultaneously realizing integral impregnation of the upper skin (2), the lower skin (1) and the foam sandwich (3);
and step nine, curing the part according to the technical specification of the resin material after the impregnation is finished, and demolding.
4. The integrated forming method of the foam sandwich hat type reinforced wall plate structure according to claim 3, wherein the reinforcement material is selected from one or more of carbon fiber, glass fiber and aramid fiber.
5. The method as claimed in claim 4, wherein the reinforcement material is a continuous dry fiber fabric including one or more of unidirectional fabric, plain fabric, twill fabric, and satin fabric.
6. The integrated forming method of the foam sandwich hat type reinforced wall plate structure according to claim 3, wherein the main component of the setting agent is one or more of unsaturated polyester, epoxy resin, novolac epoxy resin, bismaleimide phenyl methane, diallyl bisphenol A, polyamide resin and carboxyl-terminated liquid nitrile rubber.
7. The integrated forming method of the foam sandwich hat type reinforced wall plate structure according to claim 3, wherein the loading mode of the sizing agent loading fabric is one or more of powder loading, solution loading and resin film loading.
8. The integrated forming method of the foam sandwich hat type reinforced wall plate structure according to claim 7, wherein the mass fraction of the sizing agent in the sizing agent loaded fabric is 3-10%.
9. The integrated forming method of the foam sandwich hat-shaped reinforced wall plate structure according to claim 3, wherein the material of the foam sandwich (3) is one or more of polymethacrylimide foam, polyurethane foam and polyvinyl chloride foam.
10. The integrated molding method of the foam sandwich hat type stiffened wall panel structure according to claim 9, wherein the material density of the foam sandwich (3) is 50 to 130 kg/m 3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110973262.6A CN113772076A (en) | 2021-08-24 | 2021-08-24 | Foam sandwich hat-shaped reinforced wall plate structure and integrated forming method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110973262.6A CN113772076A (en) | 2021-08-24 | 2021-08-24 | Foam sandwich hat-shaped reinforced wall plate structure and integrated forming method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113772076A true CN113772076A (en) | 2021-12-10 |
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| CN114368170A (en) * | 2022-01-12 | 2022-04-19 | 武汉凌科航空复材有限责任公司 | Manufacturing method of airplane cargo bridge body |
| CN114571190A (en) * | 2022-03-08 | 2022-06-03 | 中国航空制造技术研究院 | SPF/DB hollow structure forming method |
| CN115180063A (en) * | 2022-06-30 | 2022-10-14 | 中国舰船研究设计中心 | Carbon fiber composite sandwich structure cap-shaped rib and forming process method thereof |
| CN115302814A (en) * | 2022-10-09 | 2022-11-08 | 成都泰格尔航天航空科技股份有限公司 | Forming method of cap-shaped reinforced wall plate of high-aspect-ratio wing |
| CN115648657A (en) * | 2022-09-26 | 2023-01-31 | 成都飞机工业（集团）有限责任公司 | Female die forming tool and forming method |
| CN116001322A (en) * | 2022-12-26 | 2023-04-25 | 江西洪都航空工业集团有限责任公司 | RTM forming tool and forming method for guide vane composite material part |
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| CN116001322A (en) * | 2022-12-26 | 2023-04-25 | 江西洪都航空工业集团有限责任公司 | RTM forming tool and forming method for guide vane composite material part |
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