CN104385626B - Preparation method based on the composite material thin wall housing being interrupted laying - Google Patents
Preparation method based on the composite material thin wall housing being interrupted laying Download PDFInfo
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- CN104385626B CN104385626B CN201410522000.8A CN201410522000A CN104385626B CN 104385626 B CN104385626 B CN 104385626B CN 201410522000 A CN201410522000 A CN 201410522000A CN 104385626 B CN104385626 B CN 104385626B
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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
- B29C70/38—Automated lay-up, e.g. using robots, laying filaments according to predetermined patterns
- B29C70/386—Automated tape laying [ATL]
-
- 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
- B29C70/40—Shaping or impregnating by compression not applied
- B29C70/42—Shaping or impregnating by compression not applied for producing articles of definite length, i.e. discrete articles
- B29C70/44—Shaping or impregnating by compression not applied for producing articles of definite length, i.e. discrete articles using isostatic pressure, e.g. pressure difference-moulding, vacuum bag-moulding, autoclave-moulding or expanding rubber-moulding
-
- 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
- B29C70/543—Fixing the position or configuration of fibrous reinforcements before or during moulding
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Composite Materials (AREA)
- Mechanical Engineering (AREA)
- Robotics (AREA)
- Moulding By Coating Moulds (AREA)
- Casting Or Compression Moulding Of Plastics Or The Like (AREA)
Abstract
The present invention relates to a kind of preparation method based on the composite material thin wall housing being interrupted laying, belong to composite structure design and composite processing Technology field.The composite material thin wall housing distortion of the present invention is little, and maximum distortion is less than 0.5mm at ambient temperature, and this is to guaranteeing that the face the ratio of obstruction of space remote sensing system, modulation transfer function (MTF) (MTF) and coefficient of stray light are most important.The composite material thin wall shell structure form of the present invention is simple, eliminates the loaded down with trivial details structure such as muscle or rib, also mitigates construction weight.The composite material thin wall housing technical maturity of the present invention is high, and moulds of industrial equipment are simple, and the curing apparatus suitability is better, with short production cycle.
Description
Technical field
The present invention relates to a kind of preparation method based on the composite material thin wall housing being interrupted laying, belong to composite structure design and composite processing Technology field.
Background technology
The advantages such as advanced composite material has light weight, specific strength and specific modulus height, endurance, damping characteristics is good, performance can design, just progressively substituting original metal material becomes the critical material of Space Remote Sensors structure.From technical maturity and practical ranges, become the preferred material of Space Remote Sensors structure with the polymer matrix composites that high-performance fiber is reinforcement, and carbon fibre composite (CFRP), aramid fiber reinforced composite (AFRP) have occupied leading position therein.
Some Space Remote Sensors parts, for instance primary mirror or the inner cover etc. on secondary mirror, usually adopt thin-wall case structure, and wall thickness is generally no greater than 1mm, even thinner only 0.3mm.The same with conventional composites materials structure, there is also problem on deformation after this type component curing molding, and it is often relevant to laying rigidity, plate length-width ratio, thickness of slab, boundary condition etc. to deform size.Even if after the press cure molding of common symmetric layups, also there will be certain deformation, this is likely due to what the reasons such as the fiber difference with the difference of matrix, thermograde, laying error and the sliding of solidification process, composite and mold materials caused.The problem on deformation of composite is typically complex, and in practical engineering application, often adopts and increases muscle or the rib method to improve rigidity Reducing distortion.But for Space Remote Sensors structure, muscle or rib not only increase weight, also can the face the ratio of obstruction of influential system, modulation transfer function (MTF) (MTF), coefficient of stray light etc..
Summary of the invention
It is an object of the invention to for the Space Remote Sensors yielding problem of fiber-reinforced resin matrix compound material thin-wall case, propose one and be interrupted laying method, fiber-reinforced resin matrix compound material thin-wall case prepared by the method is unlikely to deform, ensure that the face the ratio of obstruction of Space Remote Sensors, modulation transfer function (MTF) (MTF) and coefficient of stray light, structural design and moulding process can be simplified simultaneously.
It is an object of the invention to be achieved through the following technical solutions.
A kind of preparation method based on the composite material thin wall housing being interrupted laying of the present invention, this thin-wall case is a tunnel like structure, and this tunnel like structure any one cross section vertically is tetragon, and four angles of tetragon all adopt arc transition；
Thin-wall case adopts fiber-reinforced resin matrix compound material laminar structure, amounts to n layer, and n >=2, n is natural number；The reinforcing material of thin-wall case is aramid fiber, carbon fiber or glass fibre；
The method is for being interrupted laying method, and step is:
The first step, Mould design and manufacturing
Design and the mould manufacturing thin-wall case, mould adopts metal material, and mold surface shape is consistent with housing；Before using, at one layer of releasing agent of external coating of mould, releasing agent tolerable temperature is generally not less than 140 DEG C, and dries.
Second step, prepared by prepreg
The prepreg that preparation is required, prepreg can adopt the form of fabric or one-way tape；Carrying out prepreg B-staged process according to the particular type of resin matrix, namely heating makes resin softening but incomplete fusion, has certain viscosity, it is simple to the laying of operation below.
3rd step, prepreg cutting
Profile cutting prepreg after launching according to thin-wall case.
4th step, laying
According to order from inside to outside, interior one layer is designated as ground floor, is followed successively by the second layer, third layer ... kth layer ... n-th layer；Ground floor to kth layer is complete laying, and (k+1) layer disconnects 5～10mm at the arc transition position of tetragon, and (k+2) disconnects every side, position uninterrupted length along last layer and increase 5～10mm again, and rule is until n-th layer according to this；k≤n/2.
According to order from outside to inside, outermost one layer is designated as ground floor, is followed successively by the second layer, third layer ... kth layer ... n-th layer；Ground floor to kth layer is complete laying, and (k+1) layer disconnects 5～10mm at the arc transition position of tetragon, and (k+2) layer disconnects every side, position uninterrupted length along last layer and increases 5～10mm again, and rule is until n-th layer according to this；k≤n/2.
After one layer of prepreg of every laying, paving covers one layer of polytetrafluoroethylene film, then progressively rolls with rubber rollers and electric iron, makes densification between layers but corrugationless.
5th step, solidifies
Repair the flash cutting lay-up process, clean the glue of die surface.
Paving is covered politef isolating membrane, is inhaled glue-line, politef isolating membrane, the equal pressing plate of technique and airfelt, adhesive seal adhesive tape encapsulated vacuum nylon film successively.Vacuum bag-autoclave method or vacuum bag-Oven Method is adopted to complete to solidify.Curing process is determined according to the particular type of resin matrix, the material of mould, the size of goods and thickness, and should be cooled to less than 60 DEG C after shutdown can come out of the stove.
6th step, the demoulding and finishing
Remove vacuum nylon film, airfelt, the equal pressing plate of technique, politef isolating membrane, inhale glue-line and politef isolating membrane, goods are deviate from from mould.
Repair and cut flash and burr.
7th step, detects deflection
Adopt the deflection of slide gauge, straight edge ruler and bright finish feeler gauge detection goods.
Beneficial effect
(1) the composite material thin wall housing distortion of the present invention is little, and maximum distortion is less than 0.5mm at ambient temperature, and this is to guaranteeing that the face the ratio of obstruction of space remote sensing system, modulation transfer function (MTF) (MTF) and coefficient of stray light are most important.
(2) the composite material thin wall shell structure form of the present invention is simple, eliminates the loaded down with trivial details structure such as muscle or rib, also mitigates construction weight.
(3) the composite material thin wall housing technical maturity of the present invention is high, and moulds of industrial equipment are simple, and the curing apparatus suitability is better, with short production cycle.
Accompanying drawing explanation
Fig. 1 is the structural representation of Space Remote Sensors inner cover in prior art；
Fig. 2 is the structural representation of cover body in Fig. 1；
Fig. 3 is the deformation schematic diagram of cover body in Fig. 1；
Fig. 4 is the structural representation of thin-wall case of the present invention；
Fig. 5 is laying schematic diagram from inside to outside；
Fig. 6 is laying schematic diagram from outside to inside.
Detailed description of the invention
Below in conjunction with drawings and Examples, the invention will be further described.
Comparative example
Panchromatic multispectral quick camera primary mirror inner cover (hereinafter referred to as inner cover) is thin-wall construction, is made up of light barrier 1, cover body 2 and reinforcement 3, as shown in Figure 1；
Wherein cover body 2 includes rule tunnel like structure and irregular tunnel like structure two parts, and any one cross section is tetragon vertically, and four angles of tetragon all adopt arc transition；The theoretical wall thickness 0.3mm of cover body 2；The surface of rule tunnel like structure hasGroup hole and width are 0.5mm groove, and the end of rule tunnel like structure adopts adhesive bonding integral with light barrier 1；The end of irregular tunnel like structure adopts adhesive bonding integral with reinforcement 3, as shown in Figure 2；
In prior art there is moderate finite deformation in the cover body 2 after curing molding, and there is the trend that curvature diminishes at the arc transition position of tetragon, and causes that the planar section connected between two circular arcs deforms, and maximum distortion △ δ is close to 5mm, as shown in Figure 3；
The end of cover body 2 adopt with reinforcement 3 adhesive bonding integral after, Leading Edge Deformation makes moderate progress, but deforms still bigger in the middle part of cover body 2, it is impossible to meet the instructions for use of camera subsystem.
Embodiment 1
Cover body 2 adopts and is interrupted laying method, enormously simplify the version of inner cover, effectively controls its maximum distortion, saves the reinforcement 3 of cover body 2 far-end simultaneously.Without reinforcement 3 cover body 2 structural representation as shown in Figure 4.
The first step, manufactures and designs the mould of cover body 2, and mould is formpiston, and mould adopts metal material, and die boundary dimensions is consistent with the inner chamber of cover body 2；Before using, at one layer of fluorocarbons releasing agent of mold working surface brushing, and dry；Fluorocarbons releasing agent can be not less than other releasing agents replacement of 140 DEG C with tolerable temperature；If desired, mould can be heated to 50～60 DEG C.
Second step, prepares the Kevlar49/8D-1 plain cloth prepreg of nominal thickness 0.1mm, and prepreg resin content controls 42 ± 5%, and volatile content requires to be not more than 3%.
3rd step, the theoretical profile cutting prepreg after launching according to cover body 2.
4th step, cover body 2 adopts three layers Kevlar49-120 type plain cloth prepreg laying to form；According to order from inside to outside, as it is shown in figure 5, employing is interrupted laying implementation it is:
1) interior one layer is complete laying, and overlapping mode is taked at splicing position, and lap width is 5mm；
2) one layer, centre disconnects 10mm at the arc transition position of tetragon；
3) outermost one layer disconnects 30mm at the arc transition position of tetragon, and fracture is symmetrical with middle one layer of fracture；
4) according to order from inside to outside on mould after laying, surface paving covers one layer of polytetrafluoroethylene film, then progressively rolls with rubber rollers and electric iron, makes fine and close between layers but corrugationless.
5th step, paving is covered politef isolating membrane, is inhaled glue-line, politef isolating membrane, the equal pressing plate of technique, airfelt, adhesive seal adhesive tape encapsulated vacuum nylon film successively.Vacuum bag-autoclave method or vacuum bag-Oven Method is adopted to complete to solidify.Curing process in the present embodiment is: evacuated pressure is not more than-0.094MPa, it is depressed into 0.2MPa outside adding after being warming up to 70 ± 3 DEG C of maintenances 0.5 hour, it is continuously heating to 120 ± 3 DEG C add and outer be depressed into 0.4MPa, shut down after being continuously heating to 140 ± 3 DEG C of maintenances 3 hours, be down to after below 60 DEG C until temperature and go out tank.
Goods are deviate from by the 6th step from mould small end, repair and cut flash and burr.
7th step, adopts the deflection of slide gauge, straight edge ruler and bright finish feeler gauge detection goods, and the extreme value of its deformation △ δ is 0.5mm.
Embodiment 2
Cover body 2 adopts and is interrupted laying method, enormously simplify the version of inner cover, effectively controls its maximum distortion, saves the reinforcement 3 of cover body 2 far-end simultaneously.Without reinforcement 3 cover body 2 structural representation as shown in Figure 4.
The first step, manufactures and designs the mould of cover body 2, and mould is former, and mould adopts metal material, and dies cavity shape is consistent with the outer surface of size Yu cover body 2；Before using, at one layer of fluorocarbons releasing agent of mold working surface brushing, and dry；Fluorocarbons releasing agent can be not less than other releasing agents replacement of 140 DEG C with tolerable temperature；If desired, mould can be heated to 50～60 DEG C.
Second step, prepares the Kevlar49/8D-1 plain cloth prepreg of nominal thickness 0.1mm, and prepreg resin content controls 42 ± 5%, and volatile content requires to be not more than 3%.
3rd step, the theoretical profile cutting prepreg after launching according to cover body 2.
4th step, cover body 2 adopts three layers Kevlar49-120 type plain cloth prepreg laying to form；According to order from outside to inside, as shown in Figure 6, employing interruption laying implementation is:
1) outermost one layer is complete laying, and overlapping mode is taked at splicing position, and lap width is 5mm；
2) one layer, centre disconnects 10mm at the arc transition position of tetragon；
3) interior one layer disconnects 30mm at the arc transition position of tetragon, and fracture is symmetrical with middle one layer of fracture；
4), cover one layer of polytetrafluoroethylene film inner surface paving, then progressively roll with rubber rollers and electric iron after laying according to order from outside to inside on mould, make densification between layers but corrugationless.
5th step, paving is covered politef isolating membrane, is inhaled glue-line, politef isolating membrane, the equal pressing plate of technique, airfelt, adhesive seal adhesive tape encapsulated vacuum nylon film successively.Vacuum bag-autoclave method or vacuum bag-Oven Method is adopted to complete to solidify.Curing process in the present embodiment is: evacuated pressure is not more than-0.094MPa, it is depressed into 0.2MPa outside adding after being warming up to 70 ± 3 DEG C of maintenances 0.5 hour, it is continuously heating to 120 ± 3 DEG C add and outer be depressed into 0.4MPa, shut down after being continuously heating to 140 ± 3 DEG C of maintenances 3 hours, be down to after below 60 DEG C until temperature and go out tank.
Goods are deviate from from the big end of mould, are repaiied and cut flash and burr by the 6th step.
7th step, adopts the deflection of slide gauge, straight edge ruler and bright finish feeler gauge detection goods, and the extreme value of its deformation △ δ is 0.5mm.
Claims (6)
1. the preparation method based on the composite material thin wall housing being interrupted laying, it is characterised in that step is:
The first step, manufactures the mould of thin-wall case；Described thin-wall case is a tunnel like structure, and this tunnel like structure any one cross section vertically is tetragon, and four angles of tetragon all adopt arc transition；
Second step, prepares prepreg；
3rd step, the profile cutting prepreg after launching according to thin-wall case；
4th step, on mould prepared by the first step laying the 3rd step reduce after prepreg；
Carrying out laying according to order from inside to outside, interior one layer is designated as ground floor, is followed successively by the second layer, third layer ... kth layer ... n-th layer；Ground floor to kth layer is complete laying, and (k+1) layer disconnects 5～10mm at the arc transition position of tetragon, and (k+2) disconnects every side, position uninterrupted length along last layer and increase 5～10mm again, and rule is until n-th layer according to this；k≤n/2；N is the lamination number of plies of thin-wall case, n >=2, and n is natural number；
After one layer of prepreg of every laying, paving covers one layer of polytetrafluoroethylene film, then progressively rolls with rubber rollers and electric iron；
5th step, paving is covered politef isolating membrane, is inhaled glue-line, politef isolating membrane, the equal pressing plate of technique and airfelt, adhesive seal adhesive tape encapsulated vacuum nylon film successively；Vacuum bag-autoclave method or vacuum bag-Oven Method is adopted to complete to solidify；
6th step, removes vacuum nylon film, airfelt, the equal pressing plate of technique, politef isolating membrane, inhales glue-line and politef isolating membrane, deviate from by goods from mould.
2. the preparation method based on the composite material thin wall housing being interrupted laying, it is characterised in that step is:
The first step, manufactures the mould of thin-wall case；Described thin-wall case is a tunnel like structure, and this tunnel like structure any one cross section vertically is tetragon, and four angles of tetragon all adopt arc transition；
Second step, prepares prepreg；
3rd step, the profile cutting prepreg after launching according to thin-wall case；
4th step, on mould prepared by the first step laying the 3rd step reduce after prepreg；
According to order from outside to inside, outermost one layer is designated as ground floor, is followed successively by the second layer, third layer ... kth layer ... n-th layer；Ground floor to kth layer is complete laying, and (k+1) layer disconnects 5～10mm at the arc transition position of tetragon, and (k+2) layer disconnects every side, position uninterrupted length along last layer and increases 5～10mm again, and rule is until n-th layer according to this；k≤n/2；N is the lamination number of plies of thin-wall case, n >=2, and n is natural number；
After one layer of prepreg of every laying, paving covers one layer of polytetrafluoroethylene film, then progressively rolls with rubber rollers and electric iron；
5th step, paving is covered politef isolating membrane, is inhaled glue-line, politef isolating membrane, the equal pressing plate of technique and airfelt, adhesive seal adhesive tape encapsulated vacuum nylon film successively；Vacuum bag-autoclave method or vacuum bag-Oven Method is adopted to complete to solidify；
6th step, removes vacuum nylon film, airfelt, the equal pressing plate of technique, politef isolating membrane, inhales glue-line and politef isolating membrane, deviate from by goods from mould.
3. a kind of preparation method based on the composite material thin wall housing being interrupted laying according to claim 1 and 2, it is characterised in that: thin-wall case adopts fiber-reinforced resin matrix compound material laminar structure.
4. a kind of preparation method based on the composite material thin wall housing being interrupted laying according to claim 1 and 2, it is characterised in that: the reinforcing material of thin-wall case is aramid fiber, carbon fiber or glass fibre.
5. a kind of preparation method based on the composite material thin wall housing being interrupted laying according to claim 1 and 2, it is characterized in that: the first step, preparing one layer of releasing agent of external coating at mould after mould, releasing agent tolerable temperature is not less than 140 DEG C, and dries.
6. a kind of preparation method based on the composite material thin wall housing being interrupted laying according to claim 1 and 2, it is characterised in that: prepreg adopts the form of fabric or one-way tape.
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| CN110625963B (en) * | 2019-09-17 | 2021-12-07 | 成都飞机工业（集团）有限责任公司 | Manufacturing method of composite material component with variable thickness and corner characteristics |
| CN110948909B (en) * | 2019-12-11 | 2021-03-16 | 江苏新扬新材料股份有限公司 | Forming method of square equal-section large-size composite material box |
| CN111483156B (en) * | 2020-04-08 | 2021-02-02 | 北京航天新风机械设备有限责任公司 | Large thin-wall reinforced half-cover layering method for composite material |
| CN114800601B (en) * | 2022-04-06 | 2024-04-19 | 北京长空动力科技有限公司 | Flexible resilient movable joint and manufacturing method thereof |
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| EP1547756A1 (en) * | 2003-12-24 | 2005-06-29 | Airbus UK Limited | Method of manufacturing aircraft components |
| CN101254652A (en) * | 2007-12-28 | 2008-09-03 | 西安交通大学 | In-situ consolidation fibre laying method and device for producing resin-based compound material component |
| CN102092135A (en) * | 2010-12-13 | 2011-06-15 | 中国航空工业集团公司北京航空材料研究院 | Method for improving rigidity of wing surface structure of composite material |
| CN102729486A (en) * | 2012-06-05 | 2012-10-17 | 东华大学 | Preparation method of thermoplastic resin/corn husk composite material |
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| EP1547756A1 (en) * | 2003-12-24 | 2005-06-29 | Airbus UK Limited | Method of manufacturing aircraft components |
| CN101254652A (en) * | 2007-12-28 | 2008-09-03 | 西安交通大学 | In-situ consolidation fibre laying method and device for producing resin-based compound material component |
| CN102092135A (en) * | 2010-12-13 | 2011-06-15 | 中国航空工业集团公司北京航空材料研究院 | Method for improving rigidity of wing surface structure of composite material |
| CN102729486A (en) * | 2012-06-05 | 2012-10-17 | 东华大学 | Preparation method of thermoplastic resin/corn husk composite material |
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Effective date of registration: 20180416 Address after: 102628, 7, Haixin Road, Huangcun Town, Beijing, Daxing District Patentee after: Beijing Aerospace Hezhong Technology Development Co., Ltd. Address before: 100076 Beijing, Fengtai District, South Road, No. 9201, box office, box 1, 5 Patentee before: Beijing Research Institute of Space Mechanical & Electrical Technology |