CN109895417A - The variable cross-section hollow structure composite material parts forming method of high-precision outer surface - Google Patents
The variable cross-section hollow structure composite material parts forming method of high-precision outer surface Download PDFInfo
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Abstract
The present invention relates to resin base fiber reinforced composite material prepreg autoclave molding technical fields, and in particular to the variable cross-section hollow structure composite material parts forming method of high-precision outer surface, using molding core model and shaping female mold；Molding core model includes soft mode and water-soluble core, and Water-Soluble Core portion is located in the space of soft mode formation；Shaping female mold includes the first former die body and the second former die body, and the first former die body is detachably connected with the second former die body；Forming method is the following steps are included: in soft mode surface paving material prepreg；Sealed composite material prepreg removes water-soluble core；Soft mode, material prepreg are placed in shaping female mold, material prepreg is solidified；The first former die body and the second former die body are dismantled, soft mode is removed.The knockout course of forming method provided by the invention is simple, and relatively low to the quality requirement of water-soluble core, at low cost.
Description
Technical field
The present invention relates to resin base fiber reinforced composite material prepreg autoclave molding technical fields, especially a kind of
The variable cross-section hollow structure composite material parts forming method of high-precision outer surface.
Background technique
Composite material flies due to the features such as its light weight, specific strength and specific stiffness are high, designability is strong in aerospace
Row device structural member field using increasingly extensive；But the manufacture of the hollow rotary structure composite material parts of abnormity is always
Problem, such as the aero-engine air intake duct of S-shaped variable cross-section；The type constitutional detail generally selects surface quality and essence when forming
Demanding one side is spent as the face being bonded with mold, abbreviation mold face.When External Shape face is mold face, group can be selected
Box-like former, then cannot be straight when no material prepreg laying space but if part section is small in order to subsequent demoulding
Connect laying and molding on former, it is necessary to part is taken off from formpiston and is transferred on former in formpiston upper berth poststack solidifies,
Uncured part blank demoulds more difficult from formpiston at this time.To achieve the purpose that smooth forming part, it is necessary to design one
The easily demoulding core model of kind.The core model mode usually used at present is as follows:
1) metallic combination formula core model, core model assembly relation is more, and mating surface precision is high, and difficulty of processing is big, at high cost, and nothing
Method guarantees the whole air-tightness of mold, easily occurs the problems such as vacuum leak in the curing process；When shape is complex, gold
Belonging to the processing of combined type pattern cannot achieve；
2) water-soluble core mould: water-soluble core mould is divided into two kinds, and one kind is pouring type core model, i.e., it is special to pour in type chamber
Core model is obtained after water-soluble material material solidification, such core model internal soundness and external mass require height, are unable to hole, material
Material is expensive, and core model manufacturing cost is high；Then another core model passes through number by pouring into cube or cylindrical body in type chamber
Control processing method obtains core model face, such core model internal soundness and external mass require height, is unable to hole, and require material
Expect machinable, same material expensive, core model manufacturing cost height；
Water-soluble core mould could be simply possible to use in male mould forming by water-soluble removal only after part is fully cured, uncomfortable
The hollow rotary structure composite material parts molding of the variable cross-section abnormity high for external surface surface quality and required precision.
Summary of the invention
Goal of the invention of the invention is: in view of the problems of the existing technology, providing a kind of change of high-precision outer surface
Cross-sectional hollow structural composite material method for forming parts, it is suitable for answering for the variable cross-section hollow structure that outer mold surface is pad pasting face
Condensation material forming parts are convenient in demoulding, are at low cost.
To achieve the goals above, the technical solution adopted by the present invention are as follows:
The variable cross-section hollow structure composite material parts forming method of high-precision outer surface, using molding core model and molding
Former；Molding core model includes soft mode and water-soluble core, and Water-Soluble Core portion is located in the space of soft mode formation；Shaping female mold packet
The first former die body and the second former die body are included, the first former die body is detachably connected with the second former die body；Forming method
The following steps are included: in soft mode surface paving material prepreg；Sealed composite material prepreg removes water-soluble core；
Soft mode, material prepreg are placed in shaping female mold, material prepreg is solidified；Dismantle the first former die body and
Two former die bodies remove soft mode.
Forming method provided by the invention uses above-mentioned molding core model, wherein molding core model includes soft mode and water
Dissolubility core.Soft mode part with composite material for being bonded, and so as to provide higher surface quality, water-soluble core is used
In support soft mode, make soft mode that there is preset shape, so that the cost of molding core model is low.In the processing of composite material parts,
Water-soluble core is first removed, then soft mode is made to deform, soft mode can be removed.And form female mold section, then by split type
Female mould structure realizes demoulding.It is found that the knockout course of forming method provided by the invention is simple, and to the matter of water-soluble core
Amount require it is relatively low, it is at low cost.
As a preferred solution of the present invention, soft mode includes inner rubber layer, carbon fibre composite layer and outer rubber layer；Carbon
Fiber composite layer is between inner rubber layer and outer rubber layer, the one of separate carbon fibre composite layer on inner rubber layer
Side is contacted with water-soluble core；The thickness of carbon fibre composite layer is no more than 0.5mm.Molding die provided by the invention
Soft mode uses above-mentioned structure, and carbon fibre composite layer guarantees soft mode in external force for playing the role of sizing
Under, the deflection of profile can control in appropriate range.Rubber layer setting is used for on the outside of carbon fibre composite layer
Carbon fibre composite layer is protected, carbon fibre composite layer is avoided thoroughly to be broken.Wherein, the layer of carbon fibre composite layer
Number is no more than 2 layers, and every layer of thickness is no more than 0.5mm.
As a preferred solution of the present invention, in sealed composite material prepreg: non-mulching composite is pre- on soft mode
Sealing joint strip is arranged in the region of leaching material, and the covering vacuum bag film on soft mode makes sealing joint strip, vacuum bag film and soft mode composition one
A sealing system, material prepreg are located in the sealing system.
It as a preferred solution of the present invention, further include following step before soft mode surface paving material prepreg
It is rapid: the paving band glue release cloth on soft mode surface.Soft mode and composite material zero are separated when can be convenient for demoulding by above step
Part.
As a preferred solution of the present invention, during the paving material prepreg of soft mode surface, every paving is default
The material prepreg of thickness carries out a pre-compacted to the material prepreg of paving.By pre-compacted, help
Bubble in removal prepreg, makes composite material parts Forming Quality with higher.
As a preferred solution of the present invention, in pre-compacted, be successively equipped on the outside of composite layer hole isolation film,
Airfelt and vacuum bag film seal vacuum bag film, are located at molding die and composite material in vacuum bag film, to form vacuum
System vacuumizes the vacuum system.
As a preferred solution of the present invention, it when solidifying material prepreg, is successively laid on the outside of composite layer
Non-porous release film, airfelt and vacuum bag film seal vacuum bag film, are located at molding die and composite material in vacuum bag film,
To form vacuum system, vacuum system is integrally placed in autoclave, applies pressure, vacuum, increases temperature.
As a preferred solution of the present invention, in removing water-soluble core part, the water-soluble core of removal is washed away by flowing water,
After removal after water-soluble core, on the inside of wiping soft mode.
As a preferred solution of the present invention, the first former die body and the second former die body are dismantled, after removing soft mode, is also wrapped
Include following steps: the glue rib at the first former die body of polishing and the second former die body molding is repaired and cuts shape, obtains composite material
Part.
As a preferred solution of the present invention, molding core model further includes support rod, and support rod one end is located at water-soluble core
In, the support rod other end is located at except water-soluble core；It is fixed-type by support rod in paving material prepreg
Core model.By the way that support rod is arranged, make it possible to realize the fixation to molding core model by fixed support rod, to make soft mode table
Face can not expose with being blocked, and be convenient for being laid with the operation of composite layer.
In conclusion by adopting the above-described technical solution, the beneficial effects of the present invention are:
1. forming method provided by the invention use above-mentioned molding core model, wherein molding core model include soft mode and
Water-soluble core.Soft mode part with composite material for being bonded, so as to provide higher surface quality, water-soluble core
It is used to support soft mode, makes soft mode that there is preset shape, so that the cost of molding core model is low.
2. first removing water-soluble core in the processing of composite material parts, then soft mode is made to deform, can removing
Soft mode.Shaping female mold realizes demoulding by split type female mould structure, so that stripping operation is simple.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the hollow rotary structure composite material parts of variable cross-section provided in an embodiment of the present invention.
Fig. 2 is the structural schematic diagram for the molding core model that forming method provided in an embodiment of the present invention uses.
Fig. 3 is the cross-sectional view for the molding core model that forming method provided in an embodiment of the present invention uses.
Fig. 4 is the structural schematic diagram for the shaping female mold that forming method provided in an embodiment of the present invention uses.
Fig. 5 is to carry out schematic diagram when step S3 in forming method provided by the invention.
Fig. 6 is II in Fig. 5 partial enlarged view.
Fig. 7 is to carry out schematic diagram when step S6 in forming method provided by the invention.
Fig. 8 is the structural representation for the mandrel molding mold used when processing molding core model used by the embodiment of the present invention
Figure.
Fig. 9 is that mandrel molding mold removes the structural schematic diagram after sealing plate.
Figure 10 is when processing molding core model used by the embodiment of the present invention, to carry out structural schematic diagram when step c.
Figure 11 is the partial enlarged view in the portion I in Figure 10.
Figure 12 is when processing molding core model used by the embodiment of the present invention, to carry out structural schematic diagram when step d.
Figure 13 is structural schematic diagram when processing molding core model used by the embodiment of the present invention, after the completion of step d.
Icon: 1- composite material parts；2- mandrel molding mold；The first die body of 21-；The second die body of 22-；23- sealing plate；
4- has hole isolation film；5- airfelt；6- vacuum bag；7- non-porous release film；8- sealing joint strip；3- forms core model；31- soft mode；
32- water solubility core；33- support rod；9- shaping female mold；The first former die body of 91-；The second former die body of 92-.
Specific embodiment
With reference to the accompanying drawing, the present invention is described in detail.
In order to make the objectives, technical solutions, and advantages of the present invention clearer, with reference to the accompanying drawings and embodiments,
The present invention will be described in further detail.It should be appreciated that described herein, specific examples are only used to explain the present invention,
It is not intended to limit the present invention.
Embodiment
Please refer to Fig. 1-Figure 13.Present embodiments provide a kind of variable cross-section hollow structure composite wood of high-precision outer surface
1 forming method of part is expected, using molding core model 3 and shaping female mold 9.
Please refer to figs. 2 and 3.Forming core model 3 includes soft mode 31, water-soluble core 32 and supporting element.
Soft mode 31 includes outer rubber layer, inner rubber layer, is carbon fibre composite between outer rubber layer and inner rubber layer
Layer.The water solubility core 32 made of water-soluble material is filled in the space that soft mode 31 surrounds.It is water-soluble in the present embodiment
Core 32 is made of water-soluble material resistant to high temperature, such as: polyvinyl alcohol (PVAL) aqueous solution and polyvinylpyrrolidone
(PVP) mixed solution of aqueous solution is as basis material, using quartz sand or glass microballoon as the water-soluble material of reinforcing material.
Wherein the mixed solution of polyvinyl alcohol (PVAL) aqueous solution and polyvinylpyrrolidone (PVP) aqueous solution is as adhesive, the glue
Stick is water-soluble.After adhesive meets water dissolution, quartz sand or glass microballoon will be defeated and dispersed, to make water-soluble core
It is removed.
The quantity of support rod 33 is two, and one of support rod 33 is located at one end of water-soluble core 32, another branch
Strut 33 is located at the other end of water-soluble core 32.33 one end of support rod is inserted into water-soluble core 32, and the other end is located at water
Except dissolubility core 32.
Referring to Fig. 4, shaping female mold 9 includes the first former die body 91 and the second former die body 92.First former die body 91
It is detachably connected with the second former die body 92.It, can be with soft mode when first former die body 91 is connected with the second former die body 92
31 cooperatively form forming parts space, wherein forming parts space is for accommodating carbon fibre composite, so that carbon fiber is multiple
Condensation material solidifies in forming parts space.In the present embodiment, the first former die body 91 and the second former die body 92 pass through spiral shell
Bolt realization is detachably connected.
Forming method provided in this embodiment the following steps are included:
S1. the molding core model 3 is fixed by support rod 33；
Wherein, the fixation of molding core model 3 can be realized, so that entire 31 surface of soft mode be made not hidden in clamp standoff bar 33
Gear, is convenient for the paving of composite layer.
S2. in the surface paving band glue release cloth of soft mode 31；
31 surface of soft mode could be covered if necessary to muti-piece release cloth, then is docked between adjacent two pieces of release cloths, without spelling
It connects.That is: the sideline of two pieces of adjacent release cloths is in contact, but two pieces of release cloths do not generate overlapping in a thickness direction.Pass through this
Kind setting influences the surface quality of composite material parts 1 after avoiding release cloth from being overlapped.
S3. (Fig. 5 and Fig. 6 is please referred to) in the 31 surface paving material prepreg of soft mode；
Wherein, during paving, a pre-compacted is carried out every preset thickness of composite material.Pre-compacted operation
It is specifically performed such that on the outside of composite layer and is successively equipped with hole isolation film 4, airfelt 5 and vacuum bag film 6, seal vacuum
Bag film 6, is located at molding die and composite material in vacuum bag film 6, to form vacuum system, vacuumizes to the vacuum system,
Composite material is compacted by the effect of atmospheric pressure.
Further, after laying for the first time and subsequent every three layings, carry out a pre-compacted operation.
After the completion of pre-compacted operation, removal has hole isolation film 4, airfelt 5 and vacuum bag film 6.
S4. sealing joint strip 8 is arranged in the region of non-mulching composite prepreg on 31 surface of soft mode, on soft mode 31
Covering vacuum bag film 6 makes sealing joint strip 8, vacuum bag film 6 and soft mode 31 form a sealing system, material prepreg position
In the sealing system.
S5. the water-soluble core 32 is removed.
Wherein it is possible to wash off water-soluble core 32 by giant.After removing water-soluble core 32, wipe soft
31 inner surface of mould.
S6. it (please refers to Fig. 7) soft mode 31, material prepreg are placed in shaping female mold 9, solidification composite material is pre-
Leaching material；
Wherein, when solidifying material prepreg, it is successively laid with non-porous release film 7 on the outside of composite layer, breathes freely
Felt 5 and vacuum bag film 6 seal the vacuum bag film 6, and molding core model 3, shaping female mold 9 and composite material is made to be located at the vacuum
In bag film 6, to form vacuum system, vacuum system is integrally placed in autoclave, applies pressure, vacuum, increases temperature.
S7. the first former die body 91 and the second former die body 92 are dismantled, soft mode 31 is removed；
S8. it polishes on composite material parts 1, at 92 molding of the first former die body 91 and the second former die body
Glue rib, repairs and cuts shape, composite material parts 1 required for obtaining.
The beneficial effect of forming method provided in an embodiment of the present invention is:
1. forming method provided by the invention uses above-mentioned molding core model 3, wherein molding core model 3 includes soft mode
31 and water-soluble core 32.31 part of soft mode with composite material for being bonded, so as to provide higher surface quality, water
Dissolubility core 32 is used to support soft mode 31, and soft mode 31 is made to have preset shape, so that the cost of molding core model 3 is low.
2. first removing water-soluble core 32, then soft mode 31 is made to deform in the processing of composite material parts 1
Remove soft mode 31.Shaping female mold 9 realizes demoulding by split type female mould structure, so that stripping operation is simple.
The present embodiment using molding core model 3 can be by obtaining by the way of following:
The processing of the molding core model 3 is carried out using mandrel molding mold 2.Fig. 8 and Fig. 9 is please referred to, the mandrel molding mold
2 include the first die body 21, the second die body 22 and sealing plate 23.First die body 21 and the second die body 22 are detachably connected.First mould
When body 21 is connected with the second die body 22, it is capable of forming molding space, the shape of molding space is used for and the composite material parts 1
Inner cavity adaptation.The both ends of molding space are equipped with opening, and the opening is for being in communication with the outside.The surface of molding space be at
Type surface.
Wherein, in the present embodiment, the first die body 21 is detachably connected with the second die body 22 by screw realization.
The quantity of sealing plate 23 is two, and one of sealing plate 23 is used to be connected with the opening of molding space one end, another
Sealing plate 23 with the opening of the molding space other end for being connected.Sealing plate 23 is equipped with through-hole.
Forming method provided in an embodiment of the present invention the following steps are included:
It a. will be on 31 blank laying to the molded surface of soft mode；
Wherein, 31 blank of soft mode includes outer rubber layer, the carbon fibre initial rinse bed of material and inner rubber layer.During laying,
Outer rubber layer, the carbon fibre initial rinse bed of material and inner rubber layer are successively laid on the molded surface on the first die body 21, in the second mould
Outer rubber layer, the carbon fibre initial rinse bed of material and inner rubber layer are successively laid on the molded surface of body 22.
Further, in the present embodiment, the solidification temperature of the carbon fibre initial rinse bed of material and outer rubber layer and inner rubber layer
Curing temperature is close, so that the carbon fibre initial rinse bed of material can sufficiently solidify during cured later, rubber layer being capable of abundant sulphur
Change.
Further, in the present embodiment, the carbon fibre initial rinse bed of material is carbon fibre fabric prepreg.Outer rubber layer and
The rubber material that inner rubber layer selects heatproof to be more than or equal to 250 DEG C, sulfurizing temperature range are 176 ± 5 DEG C.
Wherein, the laying layer number of carbon fiber prepreg is no more than two layers, and the thickness of the single layer carbon fibre initial rinse bed of material does not surpass
Cross 0.25mm.The laying direction of two layers of carbon fibre fabric prepreg is consistent, and to guarantee the symmetry of laying, avoids carbon
The fiber prepreg bed of material deforms after hardening.
B. die closing operation is carried out to the first die body 21 and the second die body 22；
Wherein, at molding, produce 31 blank of soft mode on 31 blank of soft mode and the second die body 22 on the first die body 21
Raw overlap joint, to increase intensity of the soft mode 31 at molding.
C. it pressurizes to 31 blank of soft mode and mandrel molding mold 2, keeps 31 blank of soft mode and mandrel molding mold 2 tight
Contiguity touching；
Wherein, Figure 10 and Figure 11 is please referred to, the first die body 21 and the second die body 22 after 31 blank of soft mode, molding
Outside is successively arranged with hole isolation film 4, airfelt 5 and vacuum bag, seals the vacuum bag by sealing joint strip 8, forms vacuum
System vacuumizes the vacuum system, to generate pressure, keeps soft mode blank and the first die body 21 and the second die body 22 close
Contact.
After the completion of pressurization, removal has hole isolation film 4, airfelt 5 and vacuum bag.
D. solidify 31 blank of soft mode, form soft mode 31；
Wherein, please refer to Figure 12, the outside of the first die body 21 and the second die body 22 after 31 blank of soft mode, molding according to
It is secondary to be arranged non-porous release film 7, airfelt 5 and vacuum bag, the vacuum bag is sealed by sealing joint strip 8, is evacuated to vacuum degree
Apply vacuum, pressure, heating in 31 blank of soft mode and the whole feeding autoclave of mandrel molding mold 2 not less than -0.9bar
Solidify required temperature to the vulcanization of rubber and carbon fibre composite prepreg；
After the completion of solidification, removal non-porous release film 7, airfelt 5 and vacuum bag.
E. it is fitted into a sealing plate 23, is inserted into support rod 33 in the through hole of sealing plate 23,33 one end of support rod is located at institute
It states in molding space, the other end is located at outside the molding space, gap, sealing plate between sealing sealing plate 23 and the first die body 21
Gap between 23 and the second gap, sealing plate 23 and support rod 33 between die body 22；
Wherein, by sealing joint strip 8 to being sealed at each gap.
F. water-soluble material is poured into soft mode 31, until 31 inner cavity of soft mode is completely filled.
Water-soluble material in the present embodiment refers to, the material that can be removed under the souring of water flow.In this reality
It applies in example, it is preferred to use water-soluble material resistant to high temperature, such as: polyvinyl alcohol (PVAL) aqueous solution and polyvinylpyrrolidone
(PVP) mixed solution of aqueous solution is as basis material, using quartz sand or glass microballoon as the water-soluble material of reinforcing material.
Wherein the mixed solution of polyvinyl alcohol (PVAL) aqueous solution and polyvinylpyrrolidone (PVP) aqueous solution is as adhesive, the glue
Stick is water-soluble.After adhesive meets water dissolution, quartz sand or glass microballoon will be defeated and dispersed, to make water-soluble core
It is removed.
G., another sealing plate 23 is installed, is inserted into support rod 33 in the through hole of sealing plate 23,33 one end of support rod is located at water-soluble
Property core model in, the other end is located at outside molding space, seals gap between sealing plate 23 and the first die body 21, sealing plate 23 and second
Gap, sealing plate 23 between die body 22 and the gap between support rod 33.
H. solidify the water-soluble material；
Wherein, mandrel molding mold 2, mantle blank and water-soluble material are integrally placed in baking oven, heat up, makes
Water-soluble material baking and curing.
I. it demoulds.
Sealing plate 23 is removed, separates the first die body 21 with the second die body 22.
J. the overlap for cutting soft mode 31 at molding is repaired.
By the above-mentioned means, molding core model 3 can be obtained, which can be used in high-precision in the present embodiment
It is outside one's consideration 1 forming method of variable cross-section hollow structure composite material parts on surface.
It should be noted that simply showing a kind of possible feelings of 1 structure of composite material parts in attached drawing of the invention
Shape.Forming method provided by the invention can also be used to the processing of the composite material parts 1 of other different structures, and not only limit
In a kind of situation shown in the drawings.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in essence of the invention
Made any modifications, equivalent replacements, and improvements etc., should all be included in the protection scope of the present invention within mind and principle.
Claims (10)
1. the variable cross-section hollow structure composite material parts forming method of high-precision outer surface, which is characterized in that use forming core
Mould and shaping female mold；
The molding core model includes soft mode and water-soluble core, and the Water-Soluble Core portion is located in the space of soft mode formation；
The shaping female mold includes the first former die body and the second former die body, first former die body and second former
Die body is detachably connected；
The forming method the following steps are included:
In the soft mode surface paving material prepreg；
The material prepreg is sealed, the water-soluble core is removed；
The soft mode, material prepreg are placed in the shaping female mold, the material prepreg is solidified；
First former die body and second former die body are dismantled, the soft mode is removed.
2. forming method according to claim 1, which is characterized in that the soft mode includes that inner rubber layer, carbon fiber are compound
Material layer and outer rubber layer；
The carbon fibre composite layer is separate on the inner rubber layer between the inner rubber layer and the outer rubber layer
The side of the carbon fibre composite layer is contacted with the water-soluble core；
The thickness of the carbon fibre composite layer is no more than 0.5mm.
3. forming method according to claim 1 or 2, which is characterized in that in sealing the material prepreg:
Sealing joint strip is arranged in the region of non-mulching composite prepreg on soft mode, and the covering vacuum bag film on soft mode makes close
Seal strip, vacuum bag film and soft mode form a sealing system, and material prepreg is located in the sealing system.
4. forming method according to claim 1 or 2, which is characterized in that pre- in the soft mode surface paving composite material
It is further comprising the steps of before leaching material:
The paving band glue release cloth on soft mode surface.
5. forming method according to claim 1 or 2, which is characterized in that pre- in the soft mode surface paving composite material
During leaching material, the material prepreg of every paving preset thickness is carried out the material prepreg of paving primary
Pre-compacted.
6. forming method according to claim 5, which is characterized in that in the pre-compacted, in the composite layer
Outside is successively equipped with hole isolation film, airfelt and vacuum bag film, seals the vacuum bag film, makes the molding die and compound
Material is located in the vacuum bag film, to form vacuum system, vacuumizes to the vacuum system.
7. forming method according to claim 1 or 2, which is characterized in that when solidifying the material prepreg,
It is successively laid with non-porous release film, airfelt and vacuum bag film on the outside of the composite layer, seals the vacuum bag film, makes described
Molding core model, shaping female mold and composite material are located in the vacuum bag film, to form vacuum system, the vacuum system is whole
Body is placed in autoclave, applies pressure, vacuum, increases temperature.
8. forming method according to claim 1 or 2, which is characterized in that in removing the water-soluble core part, pass through stream
Water washes away the removal water-soluble core and wipes on the inside of the soft mode after removal after the water solubility core.
9. forming method according to claim 1 or 2, which is characterized in that dismantle first former die body and described
Two former die bodies, further comprising the steps of after removing the soft mode:
Glue rib at first former die body of polishing and the second former die body molding, repairs and cuts shape, obtain composite material parts.
10. forming method according to claim 1 or 2, which is characterized in that the molding core model further includes support rod, institute
It states support rod one end to be located in the water-soluble core, the support rod other end is located at except the water-soluble core；
In paving material prepreg, pass through the fixed molding core model of the support rod.
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| CN110901098A (en) * | 2019-11-25 | 2020-03-24 | 沈阳航空航天大学 | Forming method of special-shaped tubular composite part |
| CN111376389A (en) * | 2020-03-20 | 2020-07-07 | 中国航发北京航空材料研究院 | Forming die for cylindrical composite material component with flanging and preparation method |
| CN111823449A (en) * | 2020-05-29 | 2020-10-27 | 成都飞机工业（集团）有限责任公司 | Soft mold for precisely manufacturing inverted V-shaped composite material part |
| CN112123813A (en) * | 2020-08-07 | 2020-12-25 | 北京卫星制造厂有限公司 | Co-curing forming tool for large-size arc-shaped variable-pitch section honeycomb sandwich structure |
| CN114311730A (en) * | 2021-12-22 | 2022-04-12 | 长春长光宇航复合材料有限公司 | Composite material light shield, forming die and preparation method thereof |
| CN114834062A (en) * | 2022-03-29 | 2022-08-02 | 天津爱思达新材料科技有限公司 | Forming process of special-shaped airplane air inlet channel |
| CN115107296A (en) * | 2022-06-10 | 2022-09-27 | 中国人民解放军总参谋部第六十研究所 | Die and method for integrally forming head conical part with smooth inner and outer surfaces |
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| CN110901098A (en) * | 2019-11-25 | 2020-03-24 | 沈阳航空航天大学 | Forming method of special-shaped tubular composite part |
| CN111376389A (en) * | 2020-03-20 | 2020-07-07 | 中国航发北京航空材料研究院 | Forming die for cylindrical composite material component with flanging and preparation method |
| CN111376389B (en) * | 2020-03-20 | 2021-06-01 | 中国航发北京航空材料研究院 | Forming die for cylindrical composite material component with flanging and preparation method |
| CN111823449A (en) * | 2020-05-29 | 2020-10-27 | 成都飞机工业（集团）有限责任公司 | Soft mold for precisely manufacturing inverted V-shaped composite material part |
| CN112123813A (en) * | 2020-08-07 | 2020-12-25 | 北京卫星制造厂有限公司 | Co-curing forming tool for large-size arc-shaped variable-pitch section honeycomb sandwich structure |
| CN112123813B (en) * | 2020-08-07 | 2023-02-03 | 北京卫星制造厂有限公司 | Co-curing forming tool for large-size arc-shaped variable-pitch section honeycomb sandwich structure |
| CN114311730A (en) * | 2021-12-22 | 2022-04-12 | 长春长光宇航复合材料有限公司 | Composite material light shield, forming die and preparation method thereof |
| CN114834062A (en) * | 2022-03-29 | 2022-08-02 | 天津爱思达新材料科技有限公司 | Forming process of special-shaped airplane air inlet channel |
| CN115107296A (en) * | 2022-06-10 | 2022-09-27 | 中国人民解放军总参谋部第六十研究所 | Die and method for integrally forming head conical part with smooth inner and outer surfaces |
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Application publication date: 20190618 |