CN106863874B - A kind of honeycomb method for shaping of complex-curved honeycomb sandwich construction - Google Patents
A kind of honeycomb method for shaping of complex-curved honeycomb sandwich construction Download PDFInfo
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- CN106863874B CN106863874B CN201710129416.7A CN201710129416A CN106863874B CN 106863874 B CN106863874 B CN 106863874B CN 201710129416 A CN201710129416 A CN 201710129416A CN 106863874 B CN106863874 B CN 106863874B
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- honeycomb
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
- B29D99/00—Subject matter not provided for in other groups of this subclass
- B29D99/0089—Producing honeycomb structures
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Abstract
The present invention principally falls into honeycomb sandwich construction sizing field, and in particular to a kind of honeycomb method for shaping of complex-curved honeycomb sandwich construction.The present invention be directed to complex-curved, large scales, the preparation of big thickness aramid paper honeycomb sandwich construction, cellular crystallization operation is carried out using preimpregnation honeycomb, due to presoaking honeycomb, the resin on surface not yet solidifies, therefore it is easier to deform, in actual operation, then preimpregnation honeycomb laying is passed through into tool in die surface, its edge is fixed, then solidified into curing oven or autoclave, the honeycomb after solidification, had and the preferable compactness of mold.The method maximally avoids cellular segmentation and splicing, reduces the use of splicing glue film, improves cellular quality after sizing, reduces costs.
Description
Technical field
The present invention principally falls into honeycomb sandwich construction sizing field, and in particular to the honeycomb of complex-curved honeycomb sandwich construction
Method for shaping.
Background technique
The characteristics of honeycomb sandwich construction is with its light high-stiffness, is widely used in the structure of aerospace flight vehicle, together
When, in order to reduce its manufacturing cost, the co-curing reaction of honeycomb sandwich construction is increasingly valued by people.
In the application of civil aviation, paper honeycomb is very important cellular material, very widely used, such as starts
The nacelle fan guard of machine and it is counter push away the regions such as radome fairing, have a large amount of application.In the curing process of honeycomb sandwich construction, especially
With complex-curved, i.e. cellular zone change in shape is complicated for it, the on-deformable structural member of honeycomb and large scale, big thickness
The control of honeycomb, co-curing process is more difficult.For complex-curved, the bigger honeycomb of thickness is more difficult to deform, at present
Common settling mode has: it is required that cellular provider directly cuts into the shape of needs, or according to the shape and curvature of curved surface,
Cellular segmentation and splicing are carried out, then solidifying and setting is to guarantee to splice shape.The shape for directly cutting into needs will cause big
Cellular waste is measured, the cost of manufacture, therefore cellular segmentation and splicing are increased, is a kind of more common bee comparatively
Nest mode of texturing, in this process, curved surface is more complicated, honeycomb thickness is bigger, then the quantity of piecemeal is more, due to the bee of piecemeal
Nest needs to be bonded using splicing glue film, therefore adds additional the weight of structural member, simultaneously for complex-shaped region,
The quality of honeycomb stitching portion it is difficult to ensure that, it may appear that the case where honeycomb splicing seams are excessive, splicing glue film can not tamp splicing seams, shadow
Ring the shape and quality of structural member.Meanwhile in the operation of honeycomb splicing, needs to take a substantial amount of time and manpower carries out part
Fixation, to prevent honeycomb during splicing and solidifying and setting, appearance position change and cause splicing fail, it is therefore, right
In complex-curved, large scale, the preparation of big thickness honeycomb sandwich construction, cellular sizing is wherein critical step, and
One problem.
Summary of the invention
In view of the above-mentioned problems, the present invention provides a kind of honeycomb method for shaping of complex-curved honeycomb sandwich construction, to multiple
The preparation of miscellaneous curved surface, large scale, big thickness aramid paper honeycomb sandwich construction carries out cellular crystallization operation using preimpregnation honeycomb,
Due to presoaking honeycomb, the resin on surface not yet solidifies, therefore is easier to deform, and in actual operation, will presoak honeycomb laying
In die surface, then by tool, its edge is fixed, is then solidified into curing oven or autoclave, after solidification
Honeycomb, have and the preferable compactness of mold.The method is maximum to avoid cellular segmentation and splicing, reduces splicing glue
The use of film improves cellular quality after sizing, reduces costs.
The present invention is achieved by the following technical solutions:
A kind of honeycomb method for shaping of complex-curved honeycomb sandwich construction, the honeycomb, which is used as, has complex-curved knot
The interlayer of component, the method will presoak after honeycomb is fixed on die surface and carry out first time solidification, preimpregnation bee after hardening
Secondary curing is carried out after nest surface rubberizing film makes honeycomb be formed；Interlayer knot of the honeycomb as composite material structural member after sizing
Structure；Because of in irregular shape, the more difficult deformation of cellular zone or the sizing of composite material structural member, herein referred to as complicated bent
Face；
The mold is the former or formpiston to match with composite material structural member shape.The mold is according to composite material
The shape of structural member is selected, and the former or formpiston for being easier to be laid with are selected.
Further, the mold is the formpiston of composite material.
Further, the method specifically includes the following steps:
Mold preparation: composite male mould is prepared；
Die treatment: being punched every a certain distance with drill bit on die edge, male mold surfaces is cleaned, in die surface
Rub release agent；
Preimpregnation honeycomb is fixed: whole preimpregnation honeycomb being laid on formpiston, is sequentially passed through on honeycomb and formpiston with pin
Hole, with thin tied silk is around pin both ends and applying certain power makes honeycomb preferably fit in male mould face；
Solidify for the first time: fixed preimpregnation honeycomb being placed in curing oven or autoclave and is heating and curing；175℃±10
DEG C, constant temperature 120min ± 10min.
Rubberizing film: glue-film stickup is in cellular upper and lower surface；
Solidify for the second time: the honeycomb after rubberizing film being placed in curing oven or autoclave and is solidified；Described second
Cured parameter are as follows: 180 ± 5 DEG C of solidification 120min~135min, average heating rate are 0.5~2 DEG C/min, maximum cooling speed
Rate is 2 DEG C/min.
A kind of complex-curved honeycomb sandwich construction, the sandwich is stand-by after being formed using above-mentioned method for shaping, with system
Standby required composite material structural member.This sandwich is integral, non-division and splicing, and shape and required composite material knot
Structure matching degree is high, and compactness is preferable.
Advantageous effects of the invention:
(1) present invention solidifies the preimpregnation honeycomb being easily deformed in die surface, avoids cellular segmentation and spelling
It connects, the honeycomb after reducing the use of splicing glue film and solidifying has and the preferable compactness of mold.
(2) present invention to the further rubberizing film of the honeycomb of pre-setting and carries out second of solidification after first time solidifies, and has
Effect prevents the contraction of cell edge in composite material shaping process and collapses, and enhances the mechanical strength of honeycomb, can
It is enough to bear bigger pressure.
Detailed description of the invention
Fig. 1,1 method flow diagram of embodiment；
Fig. 2, embodiment 1 presoak honeycomb sizing schematic diagram；
Fig. 3, the sizing honeycomb secondary curing schematic diagram of embodiment 1；
In figure: presoaking honeycomb after 1. formpistons, 2. preimpregnation honeycombs, 3. pins, 4. formers, 5. glue films, 6. one-step solidifications.
Specific embodiment
In order to make the objectives, technical solutions, and advantages of the present invention clearer, with reference to the accompanying drawings and embodiments, right
The present invention is explained in further detail.It should be appreciated that specific embodiment described herein is used only for explaining the present invention, and
It is not used in the restriction present invention.
On the contrary, the present invention covers any substitution done on the essence and scope of the present invention being defined by the claims, repairs
Change, equivalent method and scheme.Further, in order to make the public have a better understanding the present invention, below to of the invention thin
It is detailed to describe some specific detail sections in section description.Part without these details for a person skilled in the art
The present invention can also be understood completely in description.
Embodiment 1
A kind of honeycomb method for shaping of complex-curved honeycomb sandwich construction, the method are fixed on mold table for honeycomb is presoaked
First time solidification is carried out behind face, carries out secondary curing after preimpregnation honeycomb table face paste glue film after hardening and honeycomb is formed；It is fixed
Sandwich of the honeycomb as composite material structural member after type；Because the formpiston of the present embodiment composite material structural member is easier to be laid with
Honeycomb is presoaked, when preimpregnation honeycomb is formed, mold is the formpiston to match with the shape of composite material, and when glue film is formed, mold makes
Mold is prepared with composite material structural member, is former.
As shown in Figure 1, the method specifically includes the following steps:
Mold preparation: composite male mould is prepared；
Die treatment: being punched every a certain distance with drill bit on die edge, male mold surfaces is cleaned, in die surface
Rub release agent；Distance can be arranged according to situation, punch in this implementation power every 10cm；
Preimpregnation honeycomb is fixed: whole preimpregnation honeycomb 2 being laid on formpiston 1, is sequentially passed through on honeycomb and formpiston with pin 3
Hole, with thin tied silk around pin both ends and applying certain power makes honeycomb preferably fit in male mould face；As shown in Figure 2
Solidify for the first time: fixed preimpregnation honeycomb being placed in curing oven or autoclave and is heating and curing；175℃±10
DEG C, constant temperature 120min ± 10min.
Rubberizing film: glue-film stickup is in cellular upper and lower surface；
Solidify for the second time: the honeycomb after rubberizing film being fixed on cavity block, is placed in curing oven or autoclave and is consolidated
Change obtains sizing honeycomb, as shown in Figure 3；Second of cured parameter are as follows: 180 ± 5 DEG C of solidification 120min~135min are put down
Equal heating rate is 0.5~2 DEG C/min, and maximum rate of temperature fall is 2 DEG C/min.
Selection formpiston carries out presoaking cellular sizing, be because of the relatively good operation of formpiston, after preimpregnation honeycomb solidification, only one
A general shape also has certain flexibility.When carrying out glue film pre-setting, former is selected to carry out, after being desirable to pre-setting
Honeycomb, as close as required shape.
Embodiment 2
The present embodiment is identical as 1 scheme of embodiment, the difference is that, composite material structural member is male mould forming, due to
Formpiston is easier to be laid with preimpregnation honeycomb, therefore presoaking mold described in honeycomb pre-setting is the formpiston of composite material, used in secondary curing
Model is formpiston.
Claims (6)
1. a kind of honeycomb method for shaping of complex-curved honeycomb sandwich construction, the honeycomb is special as complex-curved interlayer
Sign is that the method will presoak after honeycomb is fixed on die surface and carry out first time solidification, preimpregnation honeycomb table after hardening
Secondary curing is carried out after face paste glue film makes honeycomb be formed；Sandwich of the honeycomb as composite material structural member after sizing；
The mold is the former or formpiston to match with the shape of composite material structural member；
The method specifically includes the following steps:
Mold preparation: composite male mould is prepared；
Die treatment: being punched on die edge with drill bit, cleans male mold surfaces, rubs release agent in die surface；
Preimpregnation honeycomb is fixed: whole preimpregnation honeycomb being laid on formpiston, sequentially passes through the hole on honeycomb and formpiston with pin, is used
It is thin that tied silk is around pin both ends and applying certain power makes honeycomb preferably fit in male mould face；
Solidify for the first time: fixed preimpregnation honeycomb being placed in curing oven or autoclave and is heating and curing；
Rubberizing film: glue-film stickup is in cellular upper and lower surface；
Second solidifies: the honeycomb after rubberizing film being placed in female mold surfaces and is placed in curing oven or autoclave solidifies.
2. a kind of honeycomb method for shaping of complex-curved honeycomb sandwich construction as described in claim 1, which is characterized in that the mould
Tool is the formpiston of composite material.
3. a kind of honeycomb method for shaping of complex-curved honeycomb sandwich construction as described in claim 1, which is characterized in that described the
The parameter of one-step solidification are as follows: 175 ± 10 DEG C, 120 ± 10min of constant temperature.
4. a kind of honeycomb method for shaping of complex-curved honeycomb sandwich construction as described in claim 1, which is characterized in that described the
The parameter of secondary curing are as follows: 180 ± 5 DEG C of solidification 120min~135min, average heating rate are 0.5~2 DEG C/min, maximum drop
Warm rate is 2 DEG C/min.
5. a kind of honeycomb method for shaping of complex-curved honeycomb sandwich construction as described in claim 1, which is characterized in that the mould
Tool material therefor is steel.
6. a kind of complex-curved honeycomb sandwich construction, which is characterized in that the honeycomb uses any the method for claim 1-5
Sizing, the honeycomb after sizing carry out as sandwich, by glue film with the prepreg of upper and lower panel it is be bonded, to carry out composite wood
Expect the preparation of structural member.
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| CN106863874B true CN106863874B (en) | 2019-04-09 |
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| CN108527889A (en) * | 2018-04-03 | 2018-09-14 | 东华大学 | A kind of honeycomb curved surface high-efficiency machining method |
| CN108297163A (en) * | 2018-04-03 | 2018-07-20 | 东华大学 | A kind of low cost honeycomb curved-surface processing method |
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| CN109291466B (en) * | 2018-08-30 | 2020-10-20 | 哈尔滨飞机工业集团有限责任公司 | Forming method of large-chamfer honeycomb sandwich structural member |
| CN109591313B (en) * | 2018-10-12 | 2021-04-30 | 江西昌河航空工业有限公司 | Honeycomb preforming process for large barrel-shaped composite material sandwich part |
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| CN110116459A (en) * | 2019-05-22 | 2019-08-13 | 永康雪纺自动化设备有限公司 | A kind of large size ceramic honeycomb inlaying device |
| CN113320204B (en) * | 2021-05-28 | 2023-03-21 | 中国电子科技集团公司第二十研究所 | Splicing tool and splicing method for aramid paper honeycombs on curved surface sandwich structure antenna cover |
| CN113601878B (en) * | 2021-06-30 | 2023-03-24 | 航天材料及工艺研究所 | Large-curvature special-shaped surface and large-height honeycomb co-curing sandwich structure composite material and forming method thereof |
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| CN1053579A (en) * | 1989-12-22 | 1991-08-07 | 伊索弗朗公司 | Weaving core, manufacturing method and the joint product made from described weaving core |
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| CN1053579A (en) * | 1989-12-22 | 1991-08-07 | 伊索弗朗公司 | Weaving core, manufacturing method and the joint product made from described weaving core |
| EP0822057A1 (en) * | 1992-12-23 | 1998-02-04 | United Technologies Corporation | A composite molding apparatus and method for high pressure co-cure molding of light-weight honeycomb core composite articles having ramped surfaces utilizing low density, stabilized ramped honeycomb cores and product formed thereby |
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