CN112123793A - Splicing method of curved surface honeycombs - Google Patents
Splicing method of curved surface honeycombs Download PDFInfo
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- CN112123793A CN112123793A CN202010813783.0A CN202010813783A CN112123793A CN 112123793 A CN112123793 A CN 112123793A CN 202010813783 A CN202010813783 A CN 202010813783A CN 112123793 A CN112123793 A CN 112123793A
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- honeycomb
- splicing
- honeycombs
- curved
- heating
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- 241000264877 Hippospongia communis Species 0.000 title claims abstract description 133
- 238000000034 method Methods 0.000 title claims abstract description 36
- 238000010438 heat treatment Methods 0.000 claims abstract description 47
- 239000002313 adhesive film Substances 0.000 claims abstract description 24
- 238000007493 shaping process Methods 0.000 claims abstract description 13
- 239000011810 insulating material Substances 0.000 claims abstract description 4
- 238000005520 cutting process Methods 0.000 claims abstract description 3
- 230000005291 magnetic effect Effects 0.000 claims description 13
- 229910018487 Ni—Cr Inorganic materials 0.000 claims description 4
- VNNRSPGTAMTISX-UHFFFAOYSA-N chromium nickel Chemical compound [Cr].[Ni] VNNRSPGTAMTISX-UHFFFAOYSA-N 0.000 claims description 4
- 238000004026 adhesive bonding Methods 0.000 claims description 3
- 229910052751 metal Inorganic materials 0.000 claims description 2
- 239000002184 metal Substances 0.000 claims description 2
- 230000005294 ferromagnetic effect Effects 0.000 claims 1
- 239000011248 coating agent Substances 0.000 abstract description 4
- 238000000576 coating method Methods 0.000 abstract description 4
- 239000003292 glue Substances 0.000 description 11
- 238000001723 curing Methods 0.000 description 10
- 239000010410 layer Substances 0.000 description 7
- 239000000853 adhesive Substances 0.000 description 4
- 230000001070 adhesive effect Effects 0.000 description 4
- 238000005187 foaming Methods 0.000 description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 239000006260 foam Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000000741 silica gel Substances 0.000 description 2
- 229910002027 silica gel Inorganic materials 0.000 description 2
- 229920000459 Nitrile rubber Polymers 0.000 description 1
- 239000012790 adhesive layer Substances 0.000 description 1
- 150000001412 amines Chemical class 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 230000007123 defense Effects 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 238000013021 overheating Methods 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
Images
Classifications
-
- 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
- B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
- B29C65/48—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding
- B29C65/50—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding using adhesive tape, e.g. thermoplastic tape; using threads or the like
-
- 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
- B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
- B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
- B29C65/18—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated tools
- B29C65/22—Heated wire resistive ribbon, resistive band or resistive strip
-
- 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
- B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
- B29C65/78—Means for handling the parts to be joined, e.g. for making containers or hollow articles, e.g. means for handling sheets, plates, web-like materials, tubular articles, hollow articles or elements to be joined therewith; Means for discharging the joined articles from the joining apparatus
- B29C65/7841—Holding or clamping means for handling purposes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2031/00—Other particular articles
- B29L2031/60—Multitubular or multicompartmented articles, e.g. honeycomb
- B29L2031/608—Honeycomb structures
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Lining Or Joining Of Plastics Or The Like (AREA)
Abstract
The invention provides a method for splicing curved honeycombs, which comprises the steps of firstly pasting an adhesive film on a honeycomb splicing surface, fixing adjacent honeycombs on two honeycomb splicing surfaces by using a strong magnet fixture, secondly embedding heating wires at the upper end and the lower end of the honeycomb splicing seam along the thickness direction, coating a heat-conducting insulating material on the surfaces of the heating wires, shaping a spliced honeycomb on a product forming curved surface mold, carrying out vacuum shaping, finally connecting the heating wires with a temperature control assembly, heating and curing the adhesive film on the honeycomb splicing surface by the energized heating wires, cutting off the power and demolding after the heating requirement is met, and taking out the heating wires at the honeycomb splicing seams. The honeycomb is directly positioned and spliced on the curved surface forming die of the product, so that the splicing method is simplified, the traditional oven heating and curing process is omitted, the operation is simple, the cost is low, the cost is reduced, and the splicing quality of the spliced curved surface honeycomb is ensured.
Description
Technical Field
The invention relates to the field of composite materials, in particular to a splicing method of a curved honeycomb.
Background
Reflectors, radomes and fairings are important structural and functional components in the aerospace and national defense fields, most of the components are curved honeycomb/skin sandwich structures, and the adaptability of curved honeycomb and products directly influences the structural strength and the contour accuracy of the products. The existing commercial honeycomb cores are all in a planar structure, and in order to transform a planar honeycomb into a curved honeycomb suitable for structures such as reflectors, radomes, fairings and the like, a common method is to splice and bend a plurality of honeycomb cores into curved honeycomb cores.
Patent document CN107379599A discloses a method for connecting and positioning two spliced honeycomb cores by using a comb-shaped fixture and a silica gel pad, and manually heating and curing foam adhesive by using a hot air gun to ensure alignment of honeycombs at splicing seams and height of the foam adhesive at the splicing seams; in the method, the comb-shaped fixture is independently customized according to the honeycomb specification of each product; the comb-shaped fixture is positioned, so that the curved surface fitting property of the spliced honeycomb and the product is difficult to ensure; the foaming glue is heated by a hand-held hot air gun, the temperature control precision is low, and the honeycomb is easily damaged by local overheating; after the foaming adhesive splicing honeycombs are cured, overflowing foaming adhesive needs to be cleaned, and honeycombs around splicing seams can be damaged.
Patent document CN109291486A discloses a shaping process method of a double-curvature special-shaped paper honeycomb member, which is to splice double-curvature honeycombs, the splicing method uses a special mold to heat and primarily shape and glue films are pasted on the upper and lower surfaces of a product-shaped curved honeycomb, and the splicing is performed in a vacuum-pumping, heating and curing secondary shaping mode; the secondary shaping honeycomb is positioned by depending on the shape of the primary shaping of the honeycomb, and the risk of splicing and debonding exists; need special primary forming frock in the honeycomb concatenation, and the in-process needs 2 times to advance the oven heating solidification, wastes time and energy.
In view of the defects of the prior art, a new splicing method needs to be designed to meet the requirements of curved honeycomb splicing.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a splicing method of a curved honeycomb.
The invention provides a splicing method of curved surface honeycombs, which comprises the following steps:
the method comprises the following steps: gluing films on the honeycomb splicing surfaces;
step two: adjacent honeycomb grids on the two honeycomb splicing surfaces are fixed by using a strong magnet fixture;
step three: heating wires are respectively embedded into the upper end and the lower end of the honeycomb splicing seam along the thickness direction;
step four: splicing the honeycombs and shaping on a product forming curved surface die;
step five: the heating wire is connected with the temperature control assembly, and the electrified heating wire heats and solidifies the adhesive film on the honeycomb splicing surface;
step six: and (5) cutting off the power and demoulding, and taking out the heating wires at the splicing seams of the honeycombs.
Preferably, the honeycomb comprises a honeycomb core, wherein the adhesive film used on the honeycomb splicing surface, the skin and the adhesive film used for bonding the honeycomb core are the same adhesive film.
Preferably, the number of the adhesive film layers used on the honeycomb splicing surface is 1-4.
Preferably, the strong magnet clamp is a plurality of rectangular strong magnetic strips, a plurality of rectangular strong magnetic strip pairs, a plurality of rectangular strong magnet pieces or a plurality of rectangular strong magnet piece pairs.
Preferably, the width of the strong magnet fixture is smaller than the side length of the honeycomb grids, and the strong magnet fixture is inserted into two adjacent honeycomb grids on the honeycomb splicing surface.
Preferably, the heating wire is a metal wire with the diameter less than or equal to 0.3mm, and the surface of the heating wire is coated with a heat-conducting insulating material.
Preferably, the heating wire is a nickel-chromium wire.
Preferably, the spliced honeycomb is shaped on the product forming curved surface mold by adopting a vacuum bag, and the vacuum degree is less than or equal to-0.01 Mpa.
Preferably, the curing requirement of each layer of adhesive film on the honeycomb splicing surface is that the curing degree of each layer of adhesive film is more than or equal to 70% within the range of being more than or equal to 1mm away from the heating wire.
Preferably, the heating temperature of the heating wire is 100-.
Compared with the prior art, the invention has the following beneficial effects:
1. according to the invention, the plurality of honeycombs are directly positioned and spliced on the curved surface forming die of the product, compared with the prior art, the problem of splicing and sliding of the curved surface honeycombs is solved, and the problem of debonding at the spliced part is avoided. Compared with the curved honeycomb splicing method of the existing mechanical fixing and oven curing method, the method simplifies the splicing procedure, omits the oven heating and curing process, obviously reduces the cost, solves the problem that the honeycomb splicing position slides along the height direction, and ensures the splicing quality of the spliced honeycomb.
2. According to the invention, when the honeycomb is spliced and cured, the abutted seams are compressed by using the strong magnetic clamp, the splicing positions are reliably compressed, the honeycomb is shaped on the curved surface mould of the product in a vacuum manner, the heating wires are used for heating the local temperature control of the adhesive layer at the honeycomb splicing positions, and the honeycomb splicing positions are not required to be heated in an oven, so that the honeycomb splicing curing device is economical and reliable.
3. According to the invention, the adhesive film for product gluing is used for splicing, no glue overflows exist at the splicing position, the honeycomb is shaped on the curved surface mould of the product through vacuum in the splicing process, and the shaped honeycomb has good fitting property with the curved surface of the product; the problems of complex tooling, complex operation, high cost, poor matching between the spliced honeycomb molded surface and a mold and the like in the existing curved surface honeycomb splicing are solved.
Drawings
Other features, objects and advantages of the invention will become more apparent upon reading of the detailed description of non-limiting embodiments with reference to the following drawings:
FIG. 1 is a schematic structural view of a honeycomb splicing state in the present invention;
FIG. 2 is a schematic cross-sectional view taken along line A-A of FIG. 1;
FIG. 3 is a schematic cross-sectional view taken along line B-B of FIG. 1;
FIG. 4 is a schematic top view of a rectangular strong magnetic stripe;
FIG. 5 is a schematic lengthwise side view of a rectangular strong magnetic stripe;
FIG. 6 is a schematic structural view of a heating wire;
fig. 7 is a schematic sectional view taken along the line a-a in fig. 6.
The figures show that:
strong magnet anchor clamps 1 honeycomb core 3 product shaping curved surface mould 5
Heating wire 2 vacuum bag 4 adhesive film layer 6
Detailed Description
The present invention will be described in detail with reference to specific examples. The following examples will assist those skilled in the art in further understanding the invention, but are not intended to limit the invention in any way. It should be noted that it would be obvious to those skilled in the art that various changes and modifications can be made without departing from the spirit of the invention. All falling within the scope of the present invention.
The invention provides a splicing method of curved honeycomb, as shown in figures 1-7, firstly, sticking a glue film on the splicing surface of the honeycomb, the number of adhesive film layers used on the honeycomb splicing surfaces is 1-4, the adjacent honeycomb grids on the two honeycomb splicing surfaces are fixed by a strong magnet fixture 1, the strong magnet clamp 1 is composed of a plurality of rectangular strong magnetic strips, a plurality of rectangular strong magnetic strip pairs, a plurality of rectangular strong magnet sheets or a plurality of rectangular strong magnet sheet pairs, the external dimension of the strong magnet clamp is smaller than the internal space of the honeycomb grid, for example, the strong magnet clamp 1 adopts a rectangular strong magnetic strip, the honeycomb grid is in a structure with a regular hexagon cross section, the width of the rectangular strong magnetic strip is recorded as M, the side length of the regular hexagon in the honeycomb grid is recorded as N, M is smaller than N, in a preferred embodiment, M is 0-2mm smaller than N, and the strong magnet clamp 1 is inserted into two adjacent honeycomb grids on the honeycomb splicing surface.
Secondly, imbed heater strip 2 respectively at honeycomb concatenation seam along the upper and lower both ends of honeycomb thickness direction, heater strip 2 adopts the diameter to be less than or equal to 0.3 mm's wire, heater strip 2 surface coating heat conduction insulating material, the concatenation honeycomb is stereotyped on product shaping curved surface mould 5, and in a preferred example, heater strip 2 adopts nickel chromium wire, the design mode of concatenation honeycomb on product shaping curved surface mould 5 adopts the vacuum bag to stereotype, and vacuum is less than or equal to-0.01 Mpa.
Further, the vacuum bag shaping is to place the product forming curved surface mold 5 and the spliced honeycomb shaped on the product forming curved surface mold 5 into a vacuum bag together, vacuumize the vacuum bag and continuously keep a certain vacuum degree, so that the spliced honeycomb is tightly attached to the product forming curved surface mold 5 in the splicing process until the splicing forming is completed.
Finally, the heating wire 2 is connected with the temperature control assembly, the electrified heating wire 2 heats and cures the adhesive films on the honeycomb splicing surface, the curing of each adhesive film on the honeycomb splicing surface has strict requirements, and the curing degree of each adhesive film within the range of more than 1mm away from the heating wire is more than or equal to 70 percent. The heating temperature of the heating wire 2 is 100-.
It should be noted that the product forming curved surface mold 5 adopted in the invention is a mold matched with the curved surface of the curved surface honeycomb product after splicing, so that the honeycomb splicing process is ensured not to be deformed, and the spliced honeycombs meet the use requirement of the product.
Specifically, the honeycomb comprises a honeycomb core 3, and in a preferred example, the adhesive film used on the splicing surface of the honeycomb, the skin and the adhesive film used for bonding the honeycomb core 3 are the same adhesive film.
In a specific embodiment, a splicing method of a paraboloid of revolution reflector with a honeycomb grid of 5mm × 0.03mm × 20mm is provided, as shown in fig. 1, 3 curved surface honeycombs are spliced, 1 layer of J47C glue film with a thickness of 0.15mm is pasted on each honeycomb splicing surface, and a glue film layer 6 is formed after the two honeycomb splicing surfaces are spliced; then, as shown in fig. 1-3, mounting a strong magnetic clamp 1 in the honeycomb grids at the splicing position, namely respectively placing 1 strong magnetic strip with the size of 20mm multiplied by 4mm multiplied by 2mm in the adjacent honeycomb grids on the splicing surfaces of the two honeycombs, and tightly pressing the honeycomb splicing seams together; then, coating heat-conducting silica gel on the surface, coating a release agent on the surface of a nickel-chromium wire with the diameter of 0.1mm, and embedding 1 heating wire 2 into the upper end and the lower end of the honeycomb abutted seam respectively as shown in figures 2 and 3; covering the honeycomb on a curved surface mould 5 for forming a reflecting surface product, making a vacuum bag 4, vacuumizing to be less than or equal to-0.05 MPa, and shaping the honeycomb on the curved surface mould 5 for forming the product; the heating wire is connected with the temperature control assembly, the heating temperature is set to be 100 ℃ and 120 ℃, and the heating is conducted for 100 min and 120 min; then the machine is shut down and cooled to the room temperature, the vacuum is removed, and the heating wire is taken out after demoulding.
Further, the main components of the J-47 glue are glue solutions or glue films of epoxy resin, nitrile rubber and modified amine curing agents, wherein the J47C glue film is one of the J-47 glue.
In the description of the present application, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing the present application and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present application.
The foregoing description of specific embodiments of the present invention has been presented. It is to be understood that the present invention is not limited to the specific embodiments described above, and that various changes or modifications may be made by one skilled in the art within the scope of the appended claims without departing from the spirit of the invention. The embodiments and features of the embodiments of the present application may be combined with each other arbitrarily without conflict.
Claims (10)
1. The splicing method of the curved honeycomb is characterized by comprising the following steps:
the method comprises the following steps: gluing films on the honeycomb splicing surfaces;
step two: adjacent honeycomb grids on the two honeycomb splicing surfaces are fixed by a strong magnet clamp (1);
step three: heating wires (2) are respectively embedded into the upper end and the lower end of the honeycomb splicing seam along the thickness direction;
step four: splicing honeycombs and shaping on a product forming curved surface die (5);
step five: the heating wire (2) is connected with the temperature control component, and the electrified heating wire (2) heats and solidifies the adhesive film on the honeycomb splicing surface;
step six: and (5) cutting off the power and demoulding, and taking out the heating wire (2) at the honeycomb splicing seam.
2. The splicing method of the curved honeycomb according to claim 1, wherein the honeycomb comprises a honeycomb core (3), and the adhesive film used on the honeycomb splicing surface is the same adhesive film used for bonding the skin and the honeycomb core (3).
3. The method for splicing the curved honeycombs according to claim 1, wherein the number of the adhesive film layers used on the splicing surface of the honeycombs is 1-4.
4. The method for splicing curved honeycombs according to claim 1, wherein the ferromagnetic fixture (1) is a plurality of rectangular strong magnetic strips, a plurality of rectangular strong magnetic strip pairs, a plurality of rectangular strong magnet pieces or a plurality of rectangular strong magnet piece pairs.
5. The splicing method of the curved surface honeycombs according to claim 1, wherein the width of the strong magnet fixture (1) is smaller than the side length of the honeycomb cells, and the strong magnet fixture (1) is inserted into two adjacent honeycomb cells on the honeycomb splicing surface.
6. The splicing method of the curved honeycomb according to claim 1, wherein the heating wires (2) are metal wires with the diameter of less than or equal to 0.3mm, and the surfaces of the heating wires (2) are coated with heat-conducting insulating materials.
7. The splicing method of the curved honeycombs according to claim 6, wherein the heating wires (2) are nickel-chromium wires.
8. The method for splicing the curved honeycombs according to claim 1, wherein the spliced honeycombs are shaped on the curved surface forming die (5) by a vacuum bag with a vacuum degree of less than or equal to-0.01 Mpa.
9. The method for splicing the curved honeycombs according to claim 1, wherein the curing requirement of each layer of adhesive film on the splicing surface of the honeycombs is that the curing degree of each layer of adhesive film is more than or equal to 70% within the range of more than or equal to 1mm from the heating wire.
10. The method for splicing the curved surface honeycombs in the curved surface honeycomb structure as claimed in claim 1, wherein the heating temperature of the heating wire (2) is 100-120 ℃, and the heating time is 100-120 min.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010813783.0A CN112123793A (en) | 2020-08-13 | 2020-08-13 | Splicing method of curved surface honeycombs |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010813783.0A CN112123793A (en) | 2020-08-13 | 2020-08-13 | Splicing method of curved surface honeycombs |
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| CN112123793A true CN112123793A (en) | 2020-12-25 |
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| CN202010813783.0A Pending CN112123793A (en) | 2020-08-13 | 2020-08-13 | Splicing method of curved surface honeycombs |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113320204A (en) * | 2021-05-28 | 2021-08-31 | 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 |
| CN114103168A (en) * | 2021-11-19 | 2022-03-01 | 哈尔滨工业大学 | Die for preparing composite material curved surface honeycomb structural member and preparation method of structural member |
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| US20150174717A1 (en) * | 2013-12-20 | 2015-06-25 | Bell Helicopter Textron Inc. | Method of securing composite core during a manufacturing process |
| CN105793027A (en) * | 2013-12-23 | 2016-07-20 | 米其林集团总公司 | Method for retreading a tyre using a dual heating effect |
| CN109291486A (en) * | 2018-08-23 | 2019-02-01 | 江苏恒神股份有限公司 | A kind of hyperbolicity Special paper honeycomb structure setting process method |
| DE102018217586A1 (en) * | 2018-10-15 | 2020-04-16 | Airbus Operations Gmbh | Process and insert for welding thermoplastic components |
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2020
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| CN102490362A (en) * | 2011-12-12 | 2012-06-13 | 株洲时代新材料科技股份有限公司 | Adhesive bonding process of automotive air conditioning decorating part and sealing strip |
| US20150174717A1 (en) * | 2013-12-20 | 2015-06-25 | Bell Helicopter Textron Inc. | Method of securing composite core during a manufacturing process |
| CN105793027A (en) * | 2013-12-23 | 2016-07-20 | 米其林集团总公司 | Method for retreading a tyre using a dual heating effect |
| CN104017507A (en) * | 2014-05-27 | 2014-09-03 | 江西洪都航空工业集团有限责任公司 | Cementing process of phenolic-acetal resin film for U-type slide rail |
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Application publication date: 20201225 |