CN205836041U - A kind of flexible die of forming composite stringer - Google Patents

A kind of flexible die of forming composite stringer Download PDF

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Publication number
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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CN
China
Prior art keywords
flexible
shaped
forming unit
stringer
rigid
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Withdrawn - After Issue
Application number
CN201620799719.0U
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Chinese (zh)
Inventor
辛朝波
王栋
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Commercial Aircraft Corp of China Ltd
Beijing Aeronautic Science and Technology Research Institute of COMAC
Original Assignee
Commercial Aircraft Corp of China Ltd
Beijing Aeronautic Science and Technology Research Institute of COMAC
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Application filed by Commercial Aircraft Corp of China Ltd, Beijing Aeronautic Science and Technology Research Institute of COMAC filed Critical Commercial Aircraft Corp of China Ltd
Priority to CN201620799719.0U priority Critical patent/CN205836041U/en
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Publication of CN205836041U publication Critical patent/CN205836041U/en
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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

A kind of flexible die of forming composite stringer
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.
CN201620799719.0U 2016-07-27 2016-07-27 A kind of flexible die of forming composite stringer Withdrawn - After Issue CN205836041U (en)

Priority Applications (1)

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Cited By (1)

* Cited by examiner, † Cited by third party
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

Cited By (2)

* Cited by examiner, † Cited by third party
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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AV01 Patent right actively abandoned

Granted publication date: 20161228

Effective date of abandoning: 20180717