CN104385625B - Composite material thin wall housing preparation method based on unloading port - Google Patents
Composite material thin wall housing preparation method based on unloading port Download PDFInfo
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- CN104385625B CN104385625B CN201410521997.5A CN201410521997A CN104385625B CN 104385625 B CN104385625 B CN 104385625B CN 201410521997 A CN201410521997 A CN 201410521997A CN 104385625 B CN104385625 B CN 104385625B
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- thin
- unloading port
- prepreg
- mould
- wall case
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Classifications
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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
Abstract
The present invention relates to a kind of composite material thin wall housing preparation method based on unloading port, belong to composite structure design and composite processing technology field.The composite material thin wall housing distortion of the present invention is small, and maximum distortion is no more than 0.5mm at ambient temperature, and this is most important to the face the ratio of obstruction, modulation transfer function (MTF) and coefficient of stray light for ensuring space remote sensing system.The composite material thin wall shell structure form of the present invention is simple, eliminates the cumbersome 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, to curing apparatus applicability preferably, with short production cycle.
Description
Technical field
The present invention relates to a kind of composite material thin wall housing preparation method based on unloading port, belong to composite structure and set
Meter and composite processing technology field.
Background technology
Advanced composite material (ACM) has light weight, specific strength and specific modulus height, endurance, damping characteristics are good, property
The advantages of be able to designing, just progressively substituting original metal material turns into the critical material of Space Remote Sensors structure.From technique into
For ripe degree and practical ranges, the polymer matrix composites using high-performance fiber as reinforcement turn into Space Remote Sensors knot
The important materials of structure, and carbon fibre composite (CFRP), aramid fiber reinforced composite (AFRP) occupy therein dominate
Status.
Some Space Remote Sensors parts, such as the inner cover on primary mirror or secondary mirror, usually using thin-wall case structure,
Wall thickness is generally no greater than 1mm, even more thin only 0.3mm.As conventional composites materials structure, this type component curing molding
Afterwards there is also problem on deformation, and it is often related to laying rigidity, plate length-width ratio, thickness of slab, boundary condition etc. to deform size.Even if often
The symmetric layups seen press cure shaping after, certain deformation also occurs, this be probably due to fiber and matrix difference,
What the reasons such as thermograde, the sliding of laying error and solidification process, the difference of composite and mold materials were caused.It is compound
The problem on deformation of material is typically complex, in practical engineering application, often uses increase muscle or rib to improve rigidity reduction
The method of deformation.But for Space Remote Sensors structure, muscle or rib not only increase weight, also the face of system can be influenceed to block
Than, modulation transfer function (MTF), coefficient of stray light etc..
The content of the invention
The purpose of the present invention is asked for Space Remote Sensors fiber-reinforced resin matrix compound material thin-wall case is yielding
Topic, proposes a kind of method for setting up unloading port, and fiber-reinforced resin matrix compound material thin-wall case prepared by this method is not variable
Shape, it can be ensured that face the ratio of obstruction, modulation transfer function (MTF) and the coefficient of stray light of Space Remote Sensors, while structure can be simplified
Design and moulding process.
The purpose of the present invention is achieved through the following technical solutions.
A kind of preparation method of composite material thin wall housing based on unloading port of the present invention, the thin-wall case is one and led to
Road shape structure, any one cross section is quadrangle to the tunnel like structure vertically, and four angles of quadrangle use circular arc
Transition, forms transition face；
Thin-wall case uses fiber-reinforced resin matrix compound material laminar structure, and the reinforcing material of thin-wall case is fine for aramid fiber
Dimension, glass fibre or carbon fiber；
This method is sets up unloading port method, and step is：
The first step, Mould design and manufacturing
Design and the mould of manufacture thin-wall case, mould use metal material, and mold surface shape is consistent with housing.
Before use, in one layer of releasing agent of external coating of mould, releasing agent tolerable temperature is typically not less than 140 DEG C, and dries.
It is prepared by second step, prepreg
Prepreg needed for preparing, prepreg can use the form of fabric or one-way tape；Tool according to resin matrix
Body type carries out prepreg B-staged processing, i.e. heating makes resin soften but incomplete fusion, with certain viscosity, is easy to
The laying of process below.
3rd step, prepreg is cut
Theoretical profile after being deployed according to thin-wall case cuts prepreg；Using prefabricated unloading port method, in quadrangle circular arc
The uniform unloading port of intermediate location punching, a diameter of d of unloading port, the centre-to-centre spacing of two neighboring unloading port is t；Unloading port must not surpass
Go out the arc-shaped surface at arc transition position, two neighboring unloading port centre-to-centre spacing t and diameter d difference (t-d) are not less than 10mm；If
Using prefabricated unloading port method, then the content without the 8th step below.
4th step, laying
In each layer prepreg of die surface successively laying, the unloading port requirement of each layer of prepreg is completely superposed；Per laying
After one layer of prepreg, one layer of polytetrafluoroethylene film is coated with, is then progressively rolled, made between layers with rubber rollers and electric iron
Fine and close but corrugationless.
5th step, solidification
The flash for cutting lay-up process is repaiied, the glue of die surface is cleaned.
Polytetrafluoroethylene (PTFE) barrier film is coated with successively, glue-line, polytetrafluoroethylene (PTFE) barrier film, the equal pressing plate of technique, airfelt is inhaled, and is glued
Paste sealant tape and encapsulated vacuum nylon film.Solidification is completed using vacuum bag-autoclave method or vacuum bag-Oven Method.Gu
Depending on particular type, the material of mould, the size of product and the thickness of changing technological basis resin matrix, 60 should be cooled to after shutdown
It can be come out of the stove below DEG C.
6th step, the demoulding and finishing
Remove vacuum nylon film, airfelt, the equal pressing plate of technique, polytetrafluoroethylene (PTFE) barrier film, suction glue-line and polytetrafluoro
Ethene barrier film, product is deviate from from mould.
Repair and cut flash and burr.
7th step, post-processing unloading port
Processed, laser machined or ultrasonic wave combined machining method using conventional mechanical, at quadrangle arc transition position
The uniform unloading port of post-processing, a diameter of d of unloading port, the centre-to-centre spacing of two neighboring unloading port is t；Unloading port must not exceed circular arc
The arc-shaped surface of intermediate location, two neighboring unloading port centre-to-centre spacing t and diameter d difference (t-d) is not less than 10mm；If using this
The post-processing unloading port method is walked, then without punching unloading port related content in above the 3rd step.
8th step, detects deflection
The deflection of product is detected using slide measure, straight edge ruler and smooth surface feeler gauge.
Beneficial effect
(1) composite material thin wall housing distortion of the invention is small, and maximum distortion is no more than 0.5mm at ambient temperature, this
To ensuring that the face the ratio of obstruction, modulation transfer function (MTF) and coefficient of stray light of space remote sensing system are most important.
(2) composite material thin wall shell structure form of the invention is simple, eliminates the cumbersome structure such as muscle or rib, also mitigates
Construction weight.
(3) composite material thin wall housing technical maturity of the invention is high, and moulds of industrial equipment are simple, to curing apparatus applicability
Preferably, it is with short production cycle.
Brief description of the drawings
Fig. 1 is the structural representation of Space Remote Sensors inner cover in the prior art；
Fig. 2 is the structural representation of cover body in Fig. 1；
Fig. 3 be Fig. 1 in cover body be connected with reinforcement after structural representation；
Fig. 4 is the deformation schematic diagram of cover body in Fig. 1；
Fig. 5 is the structural representation of thin-wall case of the present invention.
Embodiment
The invention will be further described with reference to the accompanying drawings and examples.
Comparative example
Certain panchromatic multispectral quick camera primary mirror inner cover (hereinafter referred to as inner cover) is thin-wall construction, by light barrier 1, cover body 2
Constituted with reinforcement 3, as shown in Figure 1；
Wherein cover body 2 includes a regular tunnel like structure and an irregular tunnel like structure two parts, any one vertically
Individual cross section is quadrangle, and four angles of quadrangle use arc transition, the theoretical wall thickness 0.3mm of cover body 2, such as Fig. 2 institutes
Show；The surface of regular tunnel like structure hasGroup hole and width are 0.5mm grooves, the end of regular tunnel like structure and light barrier
1 is integral using adhesive bonding；The end of irregular tunnel like structure is Nian Jie integral using adhesive with reinforcement 3, such as
Shown in Fig. 3；
In the prior art there is moderate finite deformation in the cover body 2 after curing molding, and there is curvature change at the arc transition position of quadrangle
Small trend, causes the planar section connected between two circular arcs to deform, and maximum distortion △ δ are close to 5mm, as shown in Figure 4；
The end of cover body 2 and reinforcement 3 using adhesive it is Nian Jie integrally after, Leading Edge Deformation makes moderate progress, but in cover body 2
Portion's deformation is still larger, it is impossible to meet the use requirement of camera subsystem.
Embodiment 1
Cover body 2 uses prefabricated unloading port method, enormously simplify the structure type of inner cover, effectively controls its maximum and becomes
Shape, while saving the reinforcement 3 of the distal end of cover body 2.The structural representation for setting up the cover body after unloading port 2 is as shown in Figure 5.
1 manufactures and designs the mould of cover body 2, and mould is formpiston, and mould uses metal material, die boundary dimensions and cover
The inner chamber of body 2 is consistent；Before use, in one layer of fluorocarbons releasing agent of mold working surface brushing, and dry；Fluorocarbons
Other releasing agents that releasing agent can be not less than 140 DEG C with tolerable temperature are replaced；If necessary, mould can be heated to 50~60 DEG C.
2 prepare nominal thickness 0.1mm Kevlar49/8D-1 plain cloth prepregs, and prepreg resin content control exists
42 ± 5%, volatile content requirement is not more than 3%.
3 cut prepreg according to the theoretical profile after the expansion of cover body 2, and equal in each arc transition position punching of quadrangle
5 unloading port of cloth, altogether 20 unloading port, a diameter of 10mm of unloading port.
4 cover bodies 2 are formed using three layers of Kevlar49-120 type plain cloth prepreg layings；According to order from inside to outside
In each layer prepreg of die surface successively laying, the unloading port requirement of each layer of prepreg is completely superposed；After laying is finished, surface
One layer of polytetrafluoroethylene film is coated with, is then progressively rolled with rubber rollers and electric iron, makes fine and close but corrugationless between layers.
5 are coated with polytetrafluoroethylene (PTFE) barrier film, inhale glue-line, polytetrafluoroethylene (PTFE) barrier film, the equal pressing plate of technique, airfelt successively,
Adhesive seal adhesive tape and encapsulated vacuum nylon film.Solidification is completed using vacuum bag-autoclave method or vacuum bag-Oven Method.
Curing process in the present embodiment is：Evacuated pressure is not more than -0.094MPa, be warming up to 70 ± 3 DEG C keep 0.5 hour after plus
Be depressed into 0.2MPa outside, be continuously heating to 120 ± 3 DEG C plus it is outer be depressed into 0.4MPa, be continuously heating to 140 ± 3 DEG C kept for 3 hours after close
Machine, tank is gone out after temperature is down to below 60 DEG C.
6 deviate from product from mould small end, repair and cut flash and burr.
7 detect the deflection of product using slide measure, straight edge ruler and smooth surface feeler gauge, and its extreme value for deforming △ δ is
0.5mm。
Embodiment 2
Cover body 2 uses post-processing unloading port method, enormously simplify the structure type of inner cover, effectively controls its maximum and becomes
Shape, while saving the reinforcement 3 of the distal end of cover body 2.The structural representation for setting up the cover body after unloading port 2 is as shown in Figure 5.
1 manufactures and designs the mould of cover body 2, and mould is formpiston, and mould uses metal material, die boundary dimensions and cover
The inner chamber of body 2 is consistent；Before use, in one layer of fluorocarbons releasing agent of mold working surface brushing, and dry；Fluorocarbons
Other releasing agents that releasing agent can be not less than 140 DEG C with tolerable temperature are replaced；If necessary, mould can be heated to 50~60 DEG C.
2 prepare nominal thickness 0.1mm Kevlar49/8D-1 plain cloth prepregs, and prepreg resin content control exists
42 ± 5%, volatile content requirement is not more than 3%.
3 cut prepreg according to the theoretical profile after the expansion of cover body 2.
4 cover bodies 2 are formed using three layers of Kevlar49-120 type plain cloth prepreg layings；According to order from inside to outside
In each layer prepreg of die surface successively laying, each layer is complete laying；After laying is finished, surface is coated with a strata tetrafluoro
Vinyl film, is then progressively rolled with rubber rollers and electric iron, makes fine and close but corrugationless between layers.
5 are coated with polytetrafluoroethylene (PTFE) barrier film, inhale glue-line, polytetrafluoroethylene (PTFE) barrier film, the equal pressing plate of technique, airfelt successively,
Adhesive seal adhesive tape and encapsulated vacuum nylon film.Solidification is completed using vacuum bag-autoclave method or vacuum bag-Oven Method.
Curing process in the present embodiment is：Evacuated pressure is not more than -0.094MPa, be warming up to 70 ± 3 DEG C keep 0.5 hour after plus
Be depressed into 0.2MPa outside, be continuously heating to 120 ± 3 DEG C plus it is outer be depressed into 0.4MPa, be continuously heating to 140 ± 3 DEG C kept for 3 hours after close
Machine, tank is gone out after temperature is down to below 60 DEG C.
6 deviate from product from mould small end, repair and cut flash and burr.
75 unloading port using laser ablation method in each arc transition position post-processing of quadrangle uniformly, altogether 20
Unloading port, a diameter of 10mm of unloading port.
8 detect the deflection of product using slide measure, straight edge ruler and smooth surface feeler gauge, and its extreme value for deforming △ δ is
0.5mm。
Claims (2)
1. a kind of preparation method of the composite material thin wall housing based on unloading port, the thin-wall case is a tunnel like structure,
Any one cross section is quadrangle to the tunnel like structure vertically, and four angles of quadrangle use arc transition, circular arc
Transition portion formation transition face；It is characterized in that steps of the method are：
The first step, manufactures the mould of thin-wall case；
Second step, prepares prepreg；
3rd step, the profile after being deployed according to thin-wall case cuts prepreg, then in the corresponding portion of transition face of thin-wall case
Position punching unloading port, a diameter of d of unloading port, the centre-to-centre spacing of two neighboring unloading port is t；Two neighboring unloading port centre-to-centre spacing t with
Diameter d difference (t-d) is not less than 10mm；D=10mm；
4th step, the prepreg after the step of laying the 3rd is reduced on mould prepared by the first step；
The unloading port requirement of each layer of prepreg is completely superposed；After one layer of prepreg of laying, a strata tetrafluoroethene is coated with thin
Film, is then progressively rolled with rubber rollers and electric iron；
5th step, be coated with successively polytetrafluoroethylene (PTFE) barrier film, inhale glue-line, it is polytetrafluoroethylene (PTFE) barrier film, the equal pressing plate of technique, ventilative
Felt, adhesive seal adhesive tape and encapsulated vacuum nylon film；Complete solid using vacuum bag-autoclave method or vacuum bag-Oven Method
Change；
6th step, removes vacuum nylon film, airfelt, the equal pressing plate of technique, polytetrafluoroethylene (PTFE) barrier film, suction glue-line and poly- four
PVF barrier film, product is deviate from from mould；
The thin-wall case is a tunnel like structure, and any one cross section is quadrangle, four to the tunnel like structure vertically
Four angles of side shape use arc transition；
Thin-wall case uses fiber-reinforced resin matrix compound material laminar structure；
The reinforcing material of thin-wall case is aramid fiber, carbon fiber or glass fibre；
In the first step, one layer of releasing agent of external coating in mould after mould is prepared, releasing agent tolerable temperature is not less than
140 DEG C, and dry；
Prepreg uses the form of fabric or one-way tape.
2. a kind of preparation method of the composite material thin wall housing based on unloading port, the thin-wall case is a tunnel like structure,
Any one cross section is quadrangle to the tunnel like structure vertically, and four angles of quadrangle use arc transition, circular arc
Transition portion formation transition face；It is characterized in that steps of the method are：
The first step, manufactures the mould of thin-wall case；
Second step, prepares prepreg；
3rd step, the profile after being deployed according to thin-wall case cuts prepreg；
4th step, the prepreg after the step of laying the 3rd is reduced on mould prepared by the first step；
After one layer of prepreg of laying, one layer of polytetrafluoroethylene film is coated with, is then progressively rolled with rubber rollers and electric iron；
5th step, be coated with successively polytetrafluoroethylene (PTFE) barrier film, inhale glue-line, it is polytetrafluoroethylene (PTFE) barrier film, the equal pressing plate of technique, ventilative
Felt, adhesive seal adhesive tape and encapsulated vacuum nylon film；Complete solid using vacuum bag-autoclave method or vacuum bag-Oven Method
Change；
6th step, removes vacuum nylon film, airfelt, the equal pressing plate of technique, polytetrafluoroethylene (PTFE) barrier film, suction glue-line and poly- four
PVF barrier film, product is deviate from from mould；
7th step, by obtained product using machining, Laser Processing or ultrasonic wave combined machining method, on transition face
The uniform unloading port of processing, a diameter of d of unloading port, the centre-to-centre spacing of two neighboring unloading port is t；Two neighboring unloading port centre-to-centre spacing
T and diameter d difference (t-d) are not less than 10mm；D=10mm；
The thin-wall case is a tunnel like structure, and any one cross section is quadrangle, four to the tunnel like structure vertically
Four angles of side shape use arc transition；
Thin-wall case uses fiber-reinforced resin matrix compound material laminar structure；
The reinforcing material of thin-wall case is aramid fiber, carbon fiber or glass fibre；
In the first step, one layer of releasing agent of external coating in mould after mould is prepared, releasing agent tolerable temperature is not less than
140 DEG C, and dry；
Prepreg uses the form of fabric or one-way tape.
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| CN201410521997.5A CN104385625B (en) | 2014-09-30 | 2014-09-30 | Composite material thin wall housing preparation method based on unloading port |
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| CN201410521997.5A CN104385625B (en) | 2014-09-30 | 2014-09-30 | Composite material thin wall housing preparation method based on unloading port |
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| CN104385625B true CN104385625B (en) | 2017-10-24 |
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| CN105459420B (en) * | 2015-12-15 | 2019-03-19 | 原秀科技（重庆）有限公司 | Keycap processing technology |
| CN108032534A (en) * | 2017-12-27 | 2018-05-15 | 沈阳浦利尔科技有限公司 | The quick overall low-cost manufacture method of hollow revolving solid composite material structural member |
| 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 |
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| CN103273662B (en) * | 2013-05-24 | 2016-03-30 | 航天材料及工艺研究所 | The preparation method of low-thermal-expansion carbon fiber enhancement resin base composite material mould |
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Effective date of registration: 20200624 Address after: 102600 No.7 Haixin Road, Huangcun Town, Daxing District, Beijing Co-patentee after: BEIJING Research Institute OF SPATIAL MECHANICAL & ELECTRICAL TECHNOLOGY Patentee after: BEIJING AEROSPACE HEZHONG TECHNOLOGY DEV Co.,Ltd. Address before: 9201 box 5, box 1, South Dahongmen Road, 100076, Beijing, Fengtai District Patentee before: BEIJING Research Institute OF SPATIAL MECHANICAL & ELECTRICAL TECHNOLOGY |