CN107139503B - The forming method of composite material cylinder component partial honeycomb sandwich construction - Google Patents
The forming method of composite material cylinder component partial honeycomb sandwich construction Download PDFInfo
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- CN107139503B CN107139503B CN201710047665.1A CN201710047665A CN107139503B CN 107139503 B CN107139503 B CN 107139503B CN 201710047665 A CN201710047665 A CN 201710047665A CN 107139503 B CN107139503 B CN 107139503B
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- composite material
- honeycomb
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- silicon rubber
- material cylinder
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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
- B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
- B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
- B29C70/28—Shaping operations therefor
- B29C70/30—Shaping by lay-up, i.e. applying fibres, tape or broadsheet on a mould, former or core; Shaping by spray-up, i.e. spraying of fibres on a mould, former or core
- B29C70/34—Shaping by lay-up, i.e. applying fibres, tape or broadsheet on a mould, former or core; Shaping by spray-up, i.e. spraying of fibres on a mould, former or core and shaping or impregnating by compression, i.e. combined with compressing after the lay-up operation
- B29C70/342—Shaping by lay-up, i.e. applying fibres, tape or broadsheet on a mould, former or core; Shaping by spray-up, i.e. spraying of fibres on a mould, former or core and shaping or impregnating by compression, i.e. combined with compressing after the lay-up operation using isostatic pressure
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
- B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
- B29C70/28—Shaping operations therefor
- B29C70/54—Component parts, details or accessories; Auxiliary operations, e.g. feeding or storage of prepregs or SMC after impregnation or during ageing
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Composite Materials (AREA)
- Mechanical Engineering (AREA)
- Laminated Bodies (AREA)
Abstract
A kind of forming method of composite material cylinder component partial honeycomb sandwich construction proposed by the present invention, it is simple and convenient, efficiently, quality is reliable and stable, to solve the problems such as current composite material cylinder component partial honeycomb interlayer forming process complex process, Forming Quality is not high.The present invention is realized by following steps: being carried out exterior skin laying in metal d ie and is coated with, then laser projection positioning device auxiliary is coated with the solid section laying except honeycomb interlayer region, blank before laying solidifies at the external covering of composite cylinder and solid section；The silicon rubber soft mode of thickness 1mm higher than honeycomb core height is put into the pit of laying formation as molding pressure pad again；Subsequent vacuum bag-autoclave molding is carried out by normal technique again；Silicon rubber soft mode is taken out after heat-pressure curing obtains the external covering of composite cylinder and solid section solidification blank；Honeycomb core is placed in the pit of the preset formation of silicon rubber, honeycomb core and interior exterior skin are glued integrated molding and obtain composite material cylinder.
Description
Technical field
The present invention relates to a kind of forming methods for composite material cylinder component partial honeycomb sandwich construction.
Background technique
In the prior art, composite honeycomb sandwich structures be through frequently with a kind of structure type, usually by two layers
Or it is pressed from both sides between multi-layer covering (also referred to as panel) with one layer of light sandwich and compound under certain temperature and pressure using adhesive
Integral rigid structure.The weight of structure can be greatly lowered in it, improve bending stiffness, improve sound insulation value, wave transparent
Performance and heat-proof quality etc..Sometimes, in the case where meeting intensity, in order to reduce the weight or the particular/special requirements such as wave transparent, multiple
Partial cells sandwich design is carried out on condensation material solid component.
In composite material shaping process, need to apply briquetting pressure.The main purpose of briquetting pressure: 1. overcome volatile matter
The vapour pressure that matter generates.Since the raising of temperature can generate volatile substance in hot pressing, if these volatile substances do not have
The effect being under pressure, it will a large amount of bubbles and micro- are formed in carbon fibre composite or glass fiber compound material
Hole will lead to carbon fibre composite or the decline of glass fiber compound material quality in this way.2. making to set using the effect of pressure
Rouge has certain fluidity energy.Prepreg layers cementing can be made more close, and make carbon cloth or glass fabric
Generate compression.4. since the presence of pressure can effectively prevent metaboly occur when laminate material is cooling.
The step of being formed according to covering and honeycomb sandwich construction, honeycomb sandwich construction forming method common at present mainly wrap
Include secondary curing method and co-curing method.Secondary curing method refers to: being previously-completed the curing molding of covering, then carries out entire interlayer knot
The curing molding of structure.Co-curing method refers to: covering is synchronous with the curing molding of entire sandwich to carry out.
When co-curing reaction manufactures honeycomb sandwich construction, due to being limited by honeycomb core material, curing molding pressure is low, exists
Covering is pressurized serious irregular intrinsic problem when transmitting pressure by honeycomb, this, which can be directly resulted in, covers intracutaneous fiber after solidification and bend
It is bent and up and down covering unbalance stress and hole that large area occur is intensive, prepreg layers cementing is adversely affected, makes to cover
The mechanical property of skin reduces, and scrapping for product is caused when serious.Especially for the composite element of partial cells sandwich,
Since its non-cellular sandwich region is solid composite material, due to being limited by honeycomb core material, curing molding pressure is low, with
The consistent solid composite material Forming Quality of honeycomb core material height is very poor, and molding rear part porosity is high, therefore should not be using altogether
Curing process manufacture.
The composite element of partial cells sandwich forms the chemical industry skill that conforms to the principle of simplicity, the angle of raising product reliability is come
It says, often uses secondary curing method.Enough molding pressures are obtained when guaranteeing that covering and solid section form using secondary curing method
Power.Guarantee honeycomb core side and the preferable adhesive strength of solid section, it is desirable that solid section is with section after covering forming
Just auxiliary mould must be arranged when forming the solid construction of non-cellular sandwiched area, otherwise non-cellular sandwiched area in " ﹂ "
Solid construction edge is at the time of molding due to becoming " ◣ " under briquetting pressure effect.It is general to use for composite material cylinder component
Former guarantees external dimensions tolerance and aesthetic finish, is arranged metal die at partial cells interlayer position, demoulding mechanism and
Positioning mechanism is very complicated, brings processing cost height.Auxiliary mould material selection metallic aluminium traditional simultaneously, but metallic aluminium is using
It is easily deformed in the process, bad with the application of mold, the product after forming is in laminate position bubble easy to form.
The disadvantages of that there are demoulding mechanism and positioning mechanisms is complicated using metal die, and processing cost is high, when molding, are become by heat
It is uneven that shape may cause covering part thickness, and component is caused to be scrapped.In order to reduce drawbacks described above and reduce cost, need to solve
The molding technology thereof problem of composite material cylinder component partial honeycomb interlayer.
Summary of the invention
The present invention is in view of the above-mentioned problems of the prior art, provide a kind of simple and convenient, and efficiently, quality is reliable and stable,
It is able to solve the rubber flexible-mould assisted forming method of composite material cylinder component partial honeycomb interlayer Forming Quality, it is current to solve
Composite material cylinder component partial honeycomb interlayer molding die is complicated, at high cost, the uncontrolled problem of Forming Quality.
Above-mentioned purpose of the invention can be realized by following steps: a kind of composite material cylinder component partial honeycomb folder
The forming method of layer structure, with its feature of following technology: by composite material cylinder component design requirement metal d ie 1 into
Row exterior skin laying is coated with, and exterior skin is coated with using laser projection positioning device auxiliary except honeycomb interlayer region after the completion of being coated with
Solid section laying, blank 2 before laying solidifies at the external covering of composite cylinder and solid section；Again by thickness than honeycomb core 5
The silicon rubber soft mode 3 of highly high 1mm is put into the pit of laying formation as molding pressure pad；After being carried out again by normal technique
Continuous vacuum bag-autoclave molding；Silicon rubber soft mode 3 is taken out after heat-pressure curing obtains the external covering of composite cylinder and reality
The partially cured blank 4 of the heart；Honeycomb core is placed in the pit of the preset formation of silicon rubber, honeycomb core 5 and interior exterior skin are glued one
Body chemical conversion type obtains the composite material cylinder of partial cells interlayer.
The present invention has the following beneficial effects: compared with the prior art
It is simple and convenient, efficient.The present invention assists mould to replace traditional partial cells sandwich compound using silicon rubber soft mode 3
Metal auxiliary mould when material barrel components form, using 144 plate of commercial product silicon rubber that directly has drawn from, due to silicon rubber
Glue and all kinds of composite resin matrixes are viscous, arbitrary deformation and light-weight, and demoulding and positioning are convenient and reusable；
Forming method is simple and convenient, efficiently, can guarantee the uniform-compression when molding of covering position to greatest extent, guarantee covering
Position composite molding quality, while also guaranteeing the neat of covering and solid intersection composite material edge, and then guarantee office
The bond strength of portion honeycomb interlayer part and solid section.With the molding composite material cylinder component of this forming method, very
Manufacture craft is simplified in big degree, is reduced costs, forming composite barrel components are reduced in lamination solid position defect,
Overall effect is good.Due to honeycomb sandwich construction light weight, specific strength is high, and especially bending stiffness is high, the honeycomb folder of homogenous quantities
Its bending stiffness of layer structural composite material is about 5 times of aluminium alloy.So that composite material cylinder component has unique resilience,
Absorbable vibration energy, has good sound insulation and noise reduction effect, has high surface degree and high-temperature stability, excellent is corrosion-resistant
Performance, insulating properties and environmental suitability.
Quality is reliable and stable.The present invention is coated with formed cylinder body component covering with prepreg on barrel components metal d ie 1
And solid section, then it regard the silicon rubber soft mode 3 of thickness at least 1mm higher than honeycomb core height as molding pressure pad, Ke Yi
Make temperature and pressure transmitting in solidification process uniformly, makes the composite cylinder system part after solidifying in the surfacing of cellular sandwich
Smooth, silicon rubber soft mode 3 plays the effect for stopping solid construction edge mobile when molding simultaneously, also can avoid traditional auxiliary
Tooling material selection metallic aluminium is easily deformed in use, bad with the application of mold, and the cylinder product after forming exists
The defect of laminate position bubble easy to form.The advantages of making auxiliary mould with rubber be it can any figuration, gold can be overcome
Belong to and is difficult to the shortcomings that forming complicated shape product as auxiliary mould.It was verified that 3 assistant formation composite material structure of silicon rubber soft mode
It is horizontal less than 1.5% second level component quality that part can reach porosity.
The present invention can on silicon rubber soft mode 3 increase uniformity pitch-row gas vent improve Forming Quality, can vacuumize,
Add under outer pressure condition, gel content volatile component is easily drained, and is effectively discharged out stomata, within a short period of time forced cooling, favorably
In the solidification quality for improving composite material cylinder component, solves current composite material cylinder component partial honeycomb interlayer and formed
It is journey complex process, of low quality, at high cost, the problems such as Forming Quality is uncontrolled.
The present invention is formed suitable for composite material cylinder component partial honeycomb interlayer.
Detailed description of the invention
Fig. 1 is the molding die schematic diagram of partial cells sandwich structure composite material barrel components of the present invention.
Fig. 2 is the molding die fragmentary sectional view of partial cells sandwich structure composite material barrel components of the present invention.
Fig. 3 is that auxiliary silicon rubber mould blank fragmentary sectional view is taken out after solidifying in the embodiment of the present invention.
Fig. 4 is the partial cells sandwich structure composite material barrel components blank part that completion is formed in the embodiment of the present invention
Cut-away view
Fig. 5 is the moulding process flow process of partial cells interlayer composite material barrel components of the present invention.
In figure: in figure: blank before 1 metal d ie, the external covering of 2 composite cylinders and solid section solidify, 3 silicon rubber are soft
Mould, the external covering of 4 composite cylinders and solid section solidify blank, 5 honeycomb cores.
Below will select exemplary complex material barrel components as embodiment, the present invention is further illustrated.
Specific embodiment
- Fig. 5 refering to fig. 1.According to the present invention, molding die is prepared by the design requirement of composite material cylinder component, formed
Mold mainly includes the metal d ie 1 of formed cylinder body component, silicon rubber soft mode 3.By the design requirement of composite material cylinder component
3 laying of blank is coated with before carrying out the solidification of the external covering of composite cylinder and solid section, and exterior skin uses after the completion of being coated with to swash
Light projection positioning device auxiliary is coated with the solid section laying except honeycomb interlayer region.Exterior skin laying is by the layer sequence designed
Layer-by-layer laying is carried out with the number of plies, successively checks, successively record.First layer laying must be close to mold, bubble-free, corrugationless,
Each layer should be all bonded completely with preceding layer, and gas must not be wrapped up between laying, can roll pressure with scraper plate local gas is discharged.It again will be thick
It spends the silicon rubber soft mode 3 1mm higher than honeycomb core 5 and is put into position shown in Fig. 1, and fixed with pressure sensitive adhesive；Again by normal technique into
Subsequent vacuum bag-the autoclave molding of row, curing process parameter are determined according to resin matrix type.According to the technological requirements, compound
Blank 2 can carry out pre-compacted by vacuumizing with vacuum bag in paving process before material cylinder exterior skin and solid section solidify,
Pressure in vacuum bag is generally not more than -0.09MPa.3~8 layers of pre-compacted of general every paving are primary.After curing molding, by silicon rubber
Plate takes out, and does not glue, can separate it with composite material from edge easily, shape because silicon rubber is deformable, and with resin
At contoured pocket as shown in Figure 3.Glue film is sticked on contoured pocket surface shown in Fig. 3, and honeycomb core 5 is put into, 5 side of honeycomb core
Foaming glue film is placed at face and solid boundary position, then by glue film by molded exterior skin is glued together to obtain shown in Fig. 4
Composite material cylinder, glue film solidification are solidified using autoclave molding, are applied briquetting pressure and are not higher than 0.2MPa.
Silicon rubber soft mode 3 is that hardness range is the commercially available silicane rubber plate of shore hardness 30~80；Partial cells interlayer, can
To be to surround cylinder one week, it is also possible to a part of cylinder any position.
Claims (3)
1. a kind of forming method of composite material cylinder component partial honeycomb sandwich construction has its feature of following technology: by multiple
The design requirement of condensation material barrel components carries out exterior skin laying in metal d ie (1) and is coated with, and exterior skin uses after the completion of being coated with
Laser projection positioning device auxiliary is coated with the solid section laying except honeycomb interlayer region, and laying is at the external covering of composite cylinder
And solid section solidifies preceding blank (2)；The thickness silicon rubber soft mode (3) 1mm higher than honeycomb core (5) height is put into laying shape again
At pit as molding pressure pad；Subsequent vacuum bag-autoclave molding is carried out by normal technique again；Heating pressurization is solid
Silicon rubber soft mode (3) are taken out after change obtains the external covering of composite cylinder and solid section solidification blank (4)；It is preset in silicon rubber
The pit of formation places honeycomb core, and integrated molding is glued in honeycomb core (5) and interior exterior skin and obtain partial cells interlayer
Composite material cylinder.
2. the forming method of composite material cylinder component partial honeycomb sandwich construction according to claim 1, it is characterised in that:
Silicon rubber soft mode (3) is that hardness range is the commercially available silicane rubber plate of shore hardness 30~80.
3. by the forming method of composite material cylinder component partial honeycomb sandwich construction described in claim 1, it is characterised in that: office
Portion's honeycomb interlayer can be a part for surrounding barrel components one week or being barrel components any position.
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| CN201710047665.1A CN107139503B (en) | 2017-01-20 | 2017-01-20 | The forming method of composite material cylinder component partial honeycomb sandwich construction |
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| CN201710047665.1A CN107139503B (en) | 2017-01-20 | 2017-01-20 | The forming method of composite material cylinder component partial honeycomb sandwich construction |
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| CN107139503A CN107139503A (en) | 2017-09-08 |
| CN107139503B true CN107139503B (en) | 2019-03-19 |
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| CN114889172B (en) * | 2022-07-14 | 2022-10-25 | 成都泰格尔航天航空科技股份有限公司 | Self-adaptive rubber blocking strip for molding ultra-thick composite material part and using method |
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