CN205836041U - A kind of flexible die of forming composite stringer - Google Patents
A kind of flexible die of forming composite stringer Download PDFInfo
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- CN205836041U CN205836041U CN201620799719.0U CN201620799719U CN205836041U CN 205836041 U CN205836041 U CN 205836041U CN 201620799719 U CN201620799719 U CN 201620799719U CN 205836041 U CN205836041 U CN 205836041U
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- Prior art keywords
- flexible
- shaped
- forming unit
- stringer
- rigid
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Abstract
This utility model belongs to technique and manufactures field, can ensure that solidification process impressed pressure effectively transmits particularly to one, and effective control hierarchy and porosity defects guarantee the flexible die of the forming composite stringer of product dimensional accuracy simultaneously.This flexible die includes at least one forming unit；The cross section of described forming unit is L-shaped or C-shaped, and L-shaped described forming unit includes at least one flexible module and two rigid matrixs, and C-shaped described forming unit, including at least two flexible module and three rigid matrixs.The beneficial effects of the utility model are, can effectively control hierarchy and porosity defects, beneficially mould position, it is ensured that the axis degree of stringer and linearity；The violence that can avoid mould assembles, and reduces labor intensity, improves work efficiency；Using segmental structure, the piecemeal of flexible die will be more flexible.
Description
Technical field
This utility model belongs to technique and manufactures field, can ensure that solidification process impressed pressure effectively passes particularly to one
Pass, effective control hierarchy and porosity defects, guarantee the mould of the forming composite stringer of product dimensional accuracy simultaneously.
Background technology
L-shaped, T-shaped, J-shaped, C-shaped and work shape stringer etc. are widely used in Composite Material Stiffened Panel, Stiffened wall
Plate typically uses co-curing or glueds joint global formation altogether.In forming process, mould is for effectively transmitting impressed pressure, controlling to divide
Layer and porosity defects, guarantee dimensional accuracy are most important, especially stringer mould.At present, field of compound material is extensively adopted
Be rigid die or rubber soft mode.Rigid die is primarily referred to as the mould that rigidity is big, as metal (aluminium alloy, ordinary steel,
Invar steel etc.) and the mould of the material such as composite.The shadow that prepreg is flowed by impressed pressure and resin in the curing process
Sound can cause thickness to reduce, and stringer there will be thickness in flange and web both direction and reduces, and therefore rigid die may
Occur that both direction moves unmatched situation, thus cause local to be built bridge, and then impressed pressure is not delivered to position, finally occurs
The layering of wallboard stringer and porosity defects.Rubber soft mode mainly uses the mould of vulcanite material, and this mold stiffness is little, solid
It is easily deformed during change, thus solves mould and move unmatched problem in stringer both direction, it is ensured that impressed pressure is effective
Transmission, thus avoid layering and porosity defects.But, owing to rubber soft mode rigidity is little, assembling process and solidifying before curing
Journey is difficult to position, easily occurs that long joist axial line degree and linearity are unsatisfactory for situation about requiring, it addition, the surface quality of its product
The best.
Utility model content
In order to solve the problems referred to above, the purpose of this utility model is to provide a kind of simple in construction, it is ensured that solidification process is additional
Pressure effectively transmits on stringer flange and web, effective control hierarchy and porosity defects, guarantees the dimensional accuracy of product simultaneously
The flexible die of forming composite stringer.
The technical solution of the utility model is: the flexible die of a kind of forming composite stringer, and this flexible die includes
At least one forming unit；The cross section of described forming unit is L-shaped or C-shaped, and L-shaped described forming unit includes at least one
Flexible module and two rigid matrixs, connected by one piece of described flexible module between two described rigid matrixs, L-shaped institute
The end stating forming unit two ends is rigid matrix；
C-shaped described forming unit, including at least two flexible module and three rigid matrixs, adjacent two described just
Property module between connected by one piece of described flexible module, the end at C-shaped described forming unit two ends is rigid matrix；
Wherein, described rigid matrix correspondence composite stringer flange and web uniform thickness region, described flexible module is corresponding
Composite stringer corner region and thickness change transitional region.
Further, the size of described flexible module is more than the composite stringer corner region of its correspondence and flange and web
Thickness change transitional region, the composite stringer flange being smaller in size than its correspondence of described rigid matrix and web uniform thickness district
Territory.
Further, use joinery and its construction to connect between described flexible module and rigid matrix, use at whole flexible die
In life cycle, this connection is non-dismountable.
Further, this mould includes that described connection unit is for by interconnective for some forming units connection unit
Flexible connecting member, described flexible connecting member uses joinery and its construction to be connected with described forming unit.
The beneficial effects of the utility model are: owing to using technique scheme, this utility model has the following characteristics that
1) relative to rigid die, the movement that the rigid matrix of flexible die can be relatively independent, mutually constraint are less, it is ensured that
In solidification process, mould occurs without bridge formation, it is achieved solidification process impressed pressure effectively transmits on stringer flange and web, effectively
Control hierarchy and porosity defects；
2) relative to rubber soft mode, uniform thickness flat area is covered by rigid matrix, can ensure that surface quality, additionally rigid mould
The use of block, can design and processing and positioning device on rigid matrix, is advantageously implemented mould location, it is ensured that the axis degree of stringer
And linearity；
3) working surface of traditional moulds, particularly stringer corner region radius are according to composite product chi after solidification
Very little design.There is thickness change due to composite before and after solidifying, solidification front mold causes with the size difference of prepreg overlay
Both do not mate, and assemble difficulty.Flexible die, particularly flexible module rigidity is little, and solidification process can adapt to pre-by deformation
Leaching material overlay thickness change, therefore, the working surface of flexible die can be permissible according to prepreg overlay profile design before solidification
Leading to avoids the violence of mould to assemble, and reduces labor intensity, improves work efficiency；
4) typically using segmental structure currently for longer stringer mould, the piecemeal of flexible die will be cleverer
Live, operate easier.
Accompanying drawing explanation
Fig. 1 is L-shaped composite stringer molding flexible die schematic diagram.
Fig. 2 is the structural representation that flexible module uses joinery and its construction to be connected with rigid matrix.
Fig. 3 solidification process stringer thickness change transitional region flexible die operation principle schematic diagram.(Fig. 3 a for solidification before,
After Fig. 3 b is for solidification).
Fig. 4 solidification process stringer corner region flexible die operation principle schematic diagram.(Fig. 4 a for solidification before, Fig. 4 b be solid
After change).
Fig. 5 is C-shaped stringer shaping schematic view.
Fig. 6 is T-shaped stringer shaping schematic view.
Fig. 7 is work shape stringer shaping schematic view.
Fig. 8 is J-shaped stringer shaping schematic view.
In figure:
1. flexible module, 2. rigid matrix, the most non-uniform thickness prepreg overlay, 4. solidification after non-uniform thickness composite structure,
L-shaped composite structure after 5.L shape prepreg overlay, 6. solidification.
Detailed description of the invention
Below in conjunction with specific embodiment, the technical solution of the utility model is described further.
As shown in Figure 1-2, the flexible die of this utility model a kind of forming composite stringer, this flexible die include to
A few forming unit；The cross section of described forming unit is L-shaped, and L-shaped described forming unit includes at least one flexible die
Block and two rigid matrixs, connected by one piece of described flexible module between two described rigid matrixs, L-shaped described molding
Unit end is rigid matrix；
Wherein, described rigid matrix correspondence composite stringer flange and web uniform thickness region, described flexible module is corresponding
Composite stringer corner region and thickness change transitional region.
The size of described flexible module becomes with web thickness more than composite stringer corner region and the flange of its correspondence
Change transitional region, the composite stringer flange being smaller in size than its correspondence of described rigid matrix and web uniform thickness region.
Joinery and its construction is used to connect, in the whole flexible die cycle in service life between described flexible module and rigid matrix
In, this connection is non-dismountable.
Described flexible die can use segmented version along composite stringer length direction, the quantity of segmentation and length with
Staff can hand operation be advisable；Preferably, sectional area selects to change transitional region at thickness along its length；Especially
Ground, if the most a certain uniform thickness region is excessive, it should carry out segmentation in uniform thickness region.Described flexible die include for
By interconnective for some forming units connection unit, described connection unit is flexible connecting member, and described flexible connecting member uses
Joinery and its construction is connected with described forming unit.Described flexible connecting member is detachable.
Preferably, rigid matrix can design and processing and positioning device, during forming composite stringer, coordinate auxiliary
Assistant engineer fills, it can be ensured that the axis degree of stringer and linearity.
As it is shown on figure 3, the change transitional region flexible die operation principle signal of this utility model solidification process stringer thickness
Figure, stringer thickness change transitional region flexible die operation principle:
After the paving of non-uniform thickness prepreg overlay 3 terminates, flexible die is placed on non-uniform thickness prepreg overlay 3.Flexible die
Have and use rigid matrix 2 in composite stringer uniform thickness region, use flexibility in composite stringer thickness change transitional region
Module 1, as shown in Figure 3.Before solidification, the thickness of non-uniform thickness prepreg overlay 3 is more than non-uniform thickness composite structure 4 after solidification
Thickness.In solidification process, impressed pressure is delivered on non-uniform thickness prepreg overlay 3 by flexible die, and non-uniform thickness prepreg spreads
Layer 3 compaction rate increases, and thickness is gradually reduced.Along with non-uniform thickness prepreg overlay 3 under the most stressed effect of rigid matrix 2
Thickness reduce move respectively along non-uniform thickness prepreg overlay 3 slab region and caul plate area surface normal.Due to non-uniform thickness
Prepreg overlay 3 slab region is different with the original depth of caul plate area, two region prepreg overlay 3 thickness in solidification process
Changing value is different, causes two area rigid module 2 amount of movements unequal.Owing to flexible module 1 rigidity is less, for coupling slab
Region and the different amount of movement of caul plate area rigid matrix 2, under impressed pressure effect, there is corresponding deformation in flexible module 1, really
Guarantor fits tightly non-uniform thickness prepreg overlay 3, effectively transmits impressed pressure, to ensure that stringer thickness changes transitional region, thin plate
Region with and slab region pressurized uniform.During whole, due to the existence of flexible module 1, slab region and caul plate area
Corresponding rigid matrix 2 can move with coupling slab region and caul plate area different-thickness changing value relative to freely, each other
Retrain less, it is to avoid such as conventional rigid mould moves unmatched problem in stringer slab region and caul plate area, and then goes out
Now building bridge, affect pressure transmission, after causing solidification, there are layering and porosity defects etc. in composite structure.
As shown in Figure 4, this utility model solidification process stringer corner region flexible die operation principle schematic diagram, stringer
Corner region flexible die operation principle is:
After L-shaped prepreg overlay 5 paving terminates, flexible die is placed on L-shaped prepreg overlay 5.Flexible die is multiple
Condensation material stringer flange and web uniform thickness region use rigid matrix 2, use flexible module at composite stringer corner region
1, as shown in Figure 4.Before solidification, the thickness of L-shaped prepreg overlay 5 is more than L-shaped composite structure 6 thickness after solidification.Solidified
Cheng Zhong, impressed pressure is delivered on L-shaped prepreg overlay 5 by flexible die, and L-shaped prepreg overlay 5 compaction rate increases, thick
Degree is gradually reduced.Along with L-shaped prepreg overlay 5 under the most stressed effect respectively of the rigid matrix 2 of flange and web region
Thickness reduce move respectively along L-shaped prepreg overlay 5 flange and web region surface normal.Flange and web region firm
Property module 2 move along two different directions, the stringer corner region radius size near flexible module 1 side becomes big simultaneously.
Owing to flexible module 1 rigidity is less, for coupling flange and the amount of movement of web region rigid matrix 2 different directions and corner regions
Change in size, under impressed pressure effect, there is corresponding deformation in flexible module 1, it is ensured that fits tightly L-shaped prepreg overlay 5, has
Effect transmission impressed pressure, uniform to ensure stringer web region, lug area and corner region pressurized.During whole, by
In the existence of flexible module 2, web can move relative to freely with the rigid matrix 2 of lug area, retrain less to each other,
Thus it is uniform to realize stringer web region, lug area and corner region pressurized, it is to avoid layering and porosity defects etc..
In this illustration, L-shaped stringer prepreg overlay web is equal with the thickness of lug area, and this flexible die is same
It is applicable to L-shaped stringer prepreg overlay web and the unequal situation of lug area thickness.
As it is shown in figure 5, this utility model molding C-shaped stringer schematic diagram, the flexible die of molding C-shaped stringer be one in C
The forming unit of shape.
As shown in Figure 6, this utility model forming T-shaped stringer schematic diagram, the flexible die of forming T-shaped stringer is L-shaped by 2
Forming unit composition.
As it is shown in fig. 7, this utility model molding work shape stringer schematic diagram, the flexible die of molding work shape stringer by 2 in C
The forming unit composition of shape.
As shown in Figure 8, this utility model molding J-shaped stringer schematic diagram, the flexible die of molding J-shaped stringer by one in C
The forming unit of shape and a L-shaped forming unit composition.
Claims (4)
1. the flexible die of a forming composite stringer, it is characterised in that this flexible die includes at least one molding list
Unit；The cross section of described forming unit is L-shaped or C-shaped；
Wherein, L-shaped described forming unit includes at least one flexible module and two rigid matrixs, two described rigid mould
Being connected by one piece of described flexible module between block, L-shaped described forming unit end is rigid matrix；
C-shaped described forming unit, including at least two flexible module and three rigid matrixs, adjacent two described rigid mould
Being connected by one piece of described flexible module between block, C-shaped described forming unit end is rigid matrix；
Described rigid matrix correspondence composite stringer flange and web uniform thickness region, described flexible module correspondence composite is long
Purlin corner region and thickness change transitional region.
Flexible die the most according to claim 1, it is characterised in that the size of described flexible module is answered more than its correspondence
Condensation material stringer corner region and flange change transitional region with web thickness, described rigid matrix be smaller in size than its correspondence
Composite stringer flange and web uniform thickness region.
Flexible die the most according to claim 1, it is characterised in that use tenon between described flexible module and rigid matrix
Fourth of the twelve Earthly Branches structure connects, and within the whole flexible die cycle in service life, this connection is non-dismountable.
4. according to the flexible die described in claim 1-3 any one claim, it is characterised in that this mould include for
By interconnective for some forming units connection unit, described connection unit is flexible connecting member, and described flexible connecting member uses
Joinery and its construction is connected with described forming unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620799719.0U CN205836041U (en) | 2016-07-27 | 2016-07-27 | A kind of flexible die of forming composite stringer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620799719.0U CN205836041U (en) | 2016-07-27 | 2016-07-27 | A kind of flexible die of forming composite stringer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205836041U true CN205836041U (en) | 2016-12-28 |
Family
ID=57639981
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620799719.0U Withdrawn - After Issue CN205836041U (en) | 2016-07-27 | 2016-07-27 | A kind of flexible die of forming composite stringer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205836041U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106079486A (en) * | 2016-07-27 | 2016-11-09 | 中国商用飞机有限责任公司北京民用飞机技术研究中心 | A kind of flexible die of forming composite stringer and preparation method thereof |
-
2016
- 2016-07-27 CN CN201620799719.0U patent/CN205836041U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106079486A (en) * | 2016-07-27 | 2016-11-09 | 中国商用飞机有限责任公司北京民用飞机技术研究中心 | A kind of flexible die of forming composite stringer and preparation method thereof |
| CN106079486B (en) * | 2016-07-27 | 2018-07-17 | 中国商用飞机有限责任公司北京民用飞机技术研究中心 | A kind of flexible die and preparation method thereof of forming composite stringer |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20161228 Effective date of abandoning: 20180717 |