CN108973089A - A kind of preparation method of composite material abnormal shape stressed-skin construction - Google Patents
A kind of preparation method of composite material abnormal shape stressed-skin construction Download PDFInfo
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- CN108973089A CN108973089A CN201810816211.0A CN201810816211A CN108973089A CN 108973089 A CN108973089 A CN 108973089A CN 201810816211 A CN201810816211 A CN 201810816211A CN 108973089 A CN108973089 A CN 108973089A
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- composite material
- skin construction
- stressed
- abnormal shape
- cover board
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Classifications
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- 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
- B29C51/00—Shaping by thermoforming, i.e. shaping sheets or sheet like preforms after heating, e.g. shaping sheets in matched moulds or by deep-drawing; Apparatus therefor
- B29C51/002—Shaping by thermoforming, i.e. shaping sheets or sheet like preforms after heating, e.g. shaping sheets in matched moulds or by deep-drawing; Apparatus therefor characterised by the choice of material
-
- 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
- B29C51/00—Shaping by thermoforming, i.e. shaping sheets or sheet like preforms after heating, e.g. shaping sheets in matched moulds or by deep-drawing; Apparatus therefor
- B29C51/12—Shaping by thermoforming, i.e. shaping sheets or sheet like preforms after heating, e.g. shaping sheets in matched moulds or by deep-drawing; Apparatus therefor of articles having inserts or reinforcements
Abstract
The present invention relates to a kind of preparation methods of composite material abnormal shape stressed-skin construction.This method comprises: preparing the group technology cover board to match with its forming surface according to composite material abnormal shape stressed-skin construction digital-to-analogue；The combination process thin layer for having both recombination region Yu non-composite area is formed by curing with resin compounded using the flexibility Boats with fibrous reticular structure, wherein, recombination region is corresponding with the joint of group technology cover board, and recombination region has the compound structure boundary of direction resin concentration gradients in face；Composite material opposite sex stressed-skin construction green body, combination process thin layer and group technology cover board are successively laminated on mold tooling from the bottom to top, formation process combination, wherein combination process thin layer is corresponding with group technology cover board joint with recombination region；Hot-press solidifying obtains required composite material abnormal shape stressed-skin construction.
Description
Technical field
The present invention relates to composite structure field shaping techniques, more particularly to a kind of composite material abnormal shape stressed-skin construction
Preparation method.
Background technique
Material structural applications are answered in aircraft industry, beam, leading edge, polyhedron comprising Zone R or beveled structure etc. are compound
Material abnormal shape covering is relatively conventional.Currently, demand is manufactured based on internal soundness, composite material abnormal shape covering preparation method mostly uses
Group technology cover board, group technology cover board generally use several independent seperated technique cover boards and are engaged by joint, point
For body technology cover board because integral thickness direction is run through in joint, the mutual coordination of action with height can satisfy composite material
Special-shaped covering internal soundness manufactures demand.However, being easy to happen the changing of the relative positions between seperated technique cover board, and then formed in article surface
Apparent surface treatment impression, generates surface quality problems.For this reason, developing novel process just becomes composite material abnormal shape
Stressed-skin construction forming field important technological problems of interest.
Therefore, a kind of preparation method of composite material abnormal shape stressed-skin construction is inventor provided.
Summary of the invention
To solve the above-mentioned problems in the prior art, the present invention provides a kind of composite material abnormal shape stressed-skin constructions
Preparation method, by being introduced between composite structure technique cover board and its molding composite material special stressed-skin construction green body of institute
The combination process thin layer of recombination region Yu non-composite area is had both, and by having the compound structure of direction resin concentration gradients in face
The recombination region on boundary mode corresponding with composite structure technique cover board joint and prepare composite material abnormal shape covering knot
Structure.
The embodiment of the present invention proposes a kind of preparation method of composite material abnormal shape stressed-skin construction, this method comprises:
According to the group technology cover board that composite material abnormal shape stressed-skin construction digital-to-analogue, preparation match with its forming surface, and utilize tool
The flexibility Boats and resin compounded for having fibrous reticular structure are formed by curing the compound work for having both recombination region Yu non-composite area
Skill thin layer, wherein the recombination region is corresponding with the joint of the group technology cover board, and recombination region direction in face has
There is the structure boundary of resin content graded composite；
By composite material opposite sex stressed-skin construction green body, the combination process thin layer and the group technology cover board from the bottom to top plate according to
It is secondary to be laminated on the mold tooling, formation process combination, wherein the combination process thin layer is with recombination region and the combination work
The corresponding mode in skill cover board joint is introduced in the process combination；
Hot pressing is carried out to the process combination, makes the composite material abnormal shape stressed-skin construction green body hot-press solidifying, obtains final
Composite material abnormal shape stressed-skin construction.
Further, the composite material abnormal shape stressed-skin construction refers to including at least a R corner structure or beveled structure
Fiber-reinforced resin matrix compound material stressed-skin construction.
Further, by being no less than, two independent separate body technique cover boards are docked the group technology cover board or overlapped
Mode engages.
Further, the material of the group technology cover board be fiber-reinforced resin matrix compound material, rubber material or
One of fiber reinforced rubber material is a variety of.
Further, the material of the resin is epoxy resin, bimaleimide resin, polyimide resin, polyphenyl
And one of oxazines resin, cyanate ester resin and phenolic resin or a variety of.
Further, the flexibility Boats are the overlapping body that non-woven fabrics is formed by single layer or multilayer.
Further, the structure of the width a of the recombination region, the thickness b of recombination region and the resin content graded composite
The width c on boundary meets 30mm≤a≤50mm, 0.1mm≤b≤1mm, c >=3b.
Further, the highest of the composite material abnormal shape stressed-skin construction green body solidifies preparation temperature Tmax and recombination region
Meet Tmax≤Tg(F between glass transition temperature Tg (F)) 30 DEG C.
To sum up, the present invention has the advantage that has with beneficial effect: the present invention is different from tradition and directlys adopt group technology lid
Plate carries out the preparation of composite material abnormal shape stressed-skin construction, and in composite structure technique cover board joint and its molding composite material of institute
Combination process thin layer is introduced between special-shaped stressed-skin construction green body.The generation of composite material special stressed-skin construction surface defect be by
Pressure jump caused by the seperated technique cover board changing of the relative positions causes, and the final root of pressure jump is dashed forward by the structural rigidity of joint
Produced by change, there is combination process thin layer recombination region and non-composite area to constitute, and recombination region is that resin matrix is formed by rigidity knot
Structure can shift the pressure jump of technique cover board joint to recombination region boundary, and recombination region boundary direction in face is
Resin content gradient composite structure is the structure type of rigidity gradual transition, and it is rigid can greatly to reduce even weakening structure completely
Property mutation effect, and then internal soundness obtain guarantee on the basis of realize the excellent surface of structure.Finally, the present invention goes back needle
The other feature of composite structure technique cover board, recombination region is limited, the implementation result entirely invented is further ensured.
Detailed description of the invention
In order to illustrate the technical solution of the embodiments of the present invention more clearly, will make below to required in the embodiment of the present invention
Attached drawing is briefly described, it should be apparent that, drawings described below is only some embodiments of the present invention, for
For those of ordinary skill in the art, without creative efforts, it can also be obtained according to these attached drawings other
Attached drawing.
Fig. 1 is group technology cover board and Boats schematic diagram of the invention.
Fig. 2 is that the present invention prepares combination process thin layer schematic diagram.
Fig. 3 is a kind of preparation schematic diagram of a scenario of composite material abnormal shape stressed-skin construction of the embodiment of the present invention.
Fig. 4 is composite material abnormal shape stressed-skin construction schematic diagram prepared by the present invention.
In figure:
1- group technology cover board；The joint of 11- group technology cover board；
2- Boats；
3- combination process thin layer；The recombination region 31-；32- non-composite area；The width of the recombination region a-；The thickness of the recombination region b-；C- tree
The width of the compound structure boundary of rouge concentration gradients；
4- composite material abnormal shape stressed-skin construction green body；
5- mold tooling；
6- composite material abnormal shape stressed-skin construction.
Specific embodiment
Embodiments of the present invention are described in further detail with reference to the accompanying drawings and examples.Following embodiment it is detailed
Thin description and attached drawing cannot be used to limit the scope of the invention for illustratively illustrating the principle of the present invention, i.e., of the invention
It is not limited to described embodiment.
It should be noted that in the absence of conflict, the features in the embodiments and the embodiments of the present application can phase
Mutually combination.The application is described in detail below with reference to accompanying drawings and in conjunction with the embodiments.
In conjunction with shown in Fig. 1, Fig. 2, Fig. 3 and Fig. 4, the preparation method of the composite material abnormal shape stressed-skin construction includes the following steps
S110 ~ step S130:
Step S110 is to prepare combination process thin layer, according to composite material abnormal shape stressed-skin construction digital-to-analogue, preparation and its forming surface phase
Matched group technology cover board 1, and using the flexibility Boats 2 with fibrous reticular structure, solidify shape with resin compounded
At the combination process thin layer 3 for having both recombination region 31 Yu non-composite area 32, wherein the engagement of recombination region 31 and group technology cover board 1
Locate 11 corresponding, recombination region 31 has the compound structure boundary of direction resin concentration gradients in face.
Wherein, the width a of the recombination region of combination process thin layer 3, the thickness b of recombination region and the resin content graded composite
The width c of structure boundary meet 30mm≤a≤50mm, 0.1mm≤b≤1mm, c >=3b.
In this step, by being no less than, two independent separate body technique cover boards are docked group technology cover board 1 or overlapped
Mode engages, also, the material of group technology cover board is fiber-reinforced resin matrix compound material, rubber material or fiber
Enhance one of rubber material.
The material of resin is epoxy resin, bimaleimide resin, polyimide resin, polybenzoxazine resin, cyanogen
One of acid ester resin and phenolic resin are a variety of.
Preferably, Boats 2 are the overlapping body that non-woven fabrics is formed by single layer or multilayer.
Step S120 is to laminate formation process combination, by composite material opposite sex stressed-skin construction green body 4, combination process thin layer 3
It is successively laminated on mold tooling 5 from the bottom to top with group technology cover board 1, the structure of formation process combination, wherein combination process
Thin layer 3 is introduced in process combination in such a way that recombination region 31 is corresponding with the joint 11 of group technology cover board 1.
Step S130 is hot-press solidifying molding, carries out hot pressing to the process combination of above-mentioned steps, covers composite material abnormal shape
Skin structure green body 4 is able to carry out hot-press solidifying, finally obtains composite material abnormal shape stressed-skin construction 6.
In this step, the highest solidification preparation temperature Tmax of composite material abnormal shape stressed-skin construction green body 4 and recombination region 31
Glass transition temperature Tg (F) between meet Tmax≤Tg(F) 30 DEG C.
The concrete application of the preparation method of composite material abnormal shape stressed-skin construction of the invention is as follows:
Embodiment 1, by taking the preparation of epoxy resin base carbon fiber composite material C beam as an example:
Step (1), there are two R corner structures for epoxy resin base carbon fiber composite material C beam tool, and design preparation is by two independent point
For body technology cover board through group technology cover board made of docking engagement, joint is located at the web area between two R corner structures, combination
The material of technique cover board is fiber reinforced rubber material, by mold tooling, chooses equal thickness carrier-free bismaleimide tree
Rouge glue film directly carries out hot melt composite curing in group technology cover board joint corresponding region with the Boats of type face all standing,
Boats are that two-layer nonwoven overlaps body, prepare and obtain and have both answering for 1 recombination region and the structuring in 2 non-composite areas
Close technique thin layer, the length a about 35mm of the recombination region, recombination region thickness b about 0.2mm, the resin content ladder that recombination region has
Compound structure boundary, the width c about 1.2mm of the structure boundary are spent, the glass transition temperature Tg (F) of recombination region is 265 DEG C.
The combination process thin layer of structuring is corresponded to epoxy resin base carbon fiber composite material C beam with recombination region by step (2)
Group technology cover board joint mode be introduced to epoxy resin base carbon fiber composite material C beam green body process combination
In, which includes the composite material opposite sex stressed-skin construction green body being successively laminated on mold tooling from the bottom to top, compound
Technique thin layer and group technology cover board.
Composite material abnormal shape stressed-skin construction green body is carried out hot-press solidifying operation, prepares epoxy resin-matrix by step (3)
Carbon fibre composite C girder construction solidifies highest curing process temperature Tmax=180 DEG C when preparation.Through detecting, the asphalt mixtures modified by epoxy resin
The internal soundness and surface quality of aliphatic radical carbon fibre composite C girder construction are functional.
Embodiment 2: by taking the preparation of bimaleimide resin base glass fiber compound material abnormal shape covering as an example:
Step (1) includes 1 dog-ear knot by the special-shaped covering of material of bimaleimide resin base glass fiber compound material
Structure and a R corner structure are designed and are prepared as 3 independent seperated technique cover boards through group technology made of wedge shape overlap joint engagement
Cover board, two joints J1, J2 are located at R corner structure two sides, and by mold tooling, it is direct to choose polyimide resin solution
It carries out compound in the corresponding region of group technology cover board joint J1, J2 with Boats and solidifies, Boats are one layer of nothing
Woven fabric, preparation have both the combination process thin layer in recombination region A1, A2 and non-composite area, and wherein recombination region A1 corresponds to joint J1, wide
A1 about 38mm, thickness b1 about 0.15mm are spent, border structure direction in face is the structure of resin content graded composite, the boundary
Width the c1 about 2.52mm, recombination region A2 of structure correspond to joint J2, width a2 about 47mm, thickness b2 about 0.2mm, boundary knot
Structure direction in face is the structure of resin content graded composite, the width c2 about 3mm of the border structure, the glass of two recombination regions
Change transition temperature Tg(F) it is 335 DEG C.
Step (2), with recombination region A1, A2 of the combination process thin layer of structuring and bismaleimide resin base glass fibre composite wood
Expect that the corresponding mode of two joints J1, J2 of the group technology cover board of special-shaped covering is introduced to bismaleimide resin base glass fibre
The process combination of the green body of composite material abnormal shape covering.
Step (3), solidifies the green body of composite material abnormal shape covering, prepares bismaleimide resin base glass fibre composite material
Special-shaped covering solidifies highest curing process temperature Tmax=200 DEG C when preparation.Through detecting, bimaleimide resin base glass
Fibrous composite abnormal shape skin-surface and internal soundness are good.
The above description is only an example of the present application, is not restricted to the application.The scope of the present invention is not being departed from
In the case where to those skilled in the art, various changes and changes are possible in this application.It is all in spirit herein and
Any modification, equivalent replacement, improvement and so within principle, should be included within the scope of claims hereof.
Claims (8)
1. a kind of preparation method of composite material abnormal shape stressed-skin construction, which is characterized in that the described method includes:
According to the group technology cover board that composite material abnormal shape stressed-skin construction digital-to-analogue, preparation match with its forming surface, and utilize tool
The flexibility Boats and resin compounded for having fibrous reticular structure are formed by curing the compound work for having both recombination region Yu non-composite area
Skill thin layer, wherein the recombination region is corresponding with the joint of the group technology cover board, and the recombination region has the side in face
To the structure boundary of resin content graded composite；
From the bottom to top successively by composite material opposite sex stressed-skin construction green body, the combination process thin layer and the group technology cover board
It is laminated on the mold tooling, formation process combination, wherein the combination process thin layer is with recombination region and the group technology
The corresponding mode in cover board joint is introduced in the process combination；
Hot pressing is carried out to the process combination, makes the composite material abnormal shape stressed-skin construction green body hot-press solidifying, obtains composite wood
Expect special-shaped stressed-skin construction.
2. the preparation method of composite material abnormal shape stressed-skin construction according to claim 1, which is characterized in that the composite wood
Expect that special-shaped stressed-skin construction refers to the fiber-reinforced resin matrix compound material covering including at least a R corner structure or beveled structure
Structure.
3. the preparation method of composite material abnormal shape stressed-skin construction according to claim 1, which is characterized in that the combination work
Skill cover board is by being no less than two independent separate body technique cover boards through docking or overlapped that mode engages.
4. the preparation method of composite material abnormal shape stressed-skin construction according to claim 3, which is characterized in that the combination work
The material of skill cover board is one of fiber-reinforced resin matrix compound material, rubber material or fiber reinforced rubber material or more
Kind.
5. the preparation method of composite material abnormal shape stressed-skin construction according to claim 1, which is characterized in that the resin
Material is epoxy resin, bimaleimide resin, polyimide resin, polybenzoxazine resin, cyanate ester resin and phenolic aldehyde
One of resin is a variety of.
6. the preparation method of composite material abnormal shape stressed-skin construction according to claim 1, which is characterized in that described is flexible
Property Boats be that non-woven fabrics is formed by the overlapping body of single layer or multilayer.
7. the preparation method of composite material abnormal shape stressed-skin construction according to claim 1, which is characterized in that the recombination region
Width a, recombination region thickness b and the resin content graded composite structure boundary width c meet 30mm≤a≤
50mm, 0.1mm≤b≤1mm, c >=3b.
8. the preparation method of composite material abnormal shape stressed-skin construction according to claim 1, which is characterized in that the composite wood
Expect that the highest of special-shaped stressed-skin construction green body solidifies to meet between preparation temperature Tmax and the glass transition temperature Tg (F) of recombination region
Tmax≤Tg(F) 30 DEG C.
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| CN201810816211.0A CN108973089B (en) | 2018-07-24 | 2018-07-24 | Preparation method of composite material special-shaped skin structure |
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| CN201810816211.0A CN108973089B (en) | 2018-07-24 | 2018-07-24 | Preparation method of composite material special-shaped skin structure |
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| CN108973089B CN108973089B (en) | 2020-05-19 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113290983A (en) * | 2021-04-08 | 2021-08-24 | 山东非金属材料研究所 | Ultra-light composite material electric heating floor and preparation method thereof |
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| US20160221319A1 (en) * | 2015-01-30 | 2016-08-04 | The Boeing Company | Gradient Curing of Composite Laminate Parts |
| CN105150562A (en) * | 2015-10-20 | 2015-12-16 | 南京航空航天大学 | Pull-extrusion device with function of molding rib at stepped type curing degree and working method of pull-extrusion device |
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