CN113478946A - Repairing method of sandwich composite material plate - Google Patents
Repairing method of sandwich composite material plate Download PDFInfo
- Publication number
- CN113478946A CN113478946A CN202110782122.0A CN202110782122A CN113478946A CN 113478946 A CN113478946 A CN 113478946A CN 202110782122 A CN202110782122 A CN 202110782122A CN 113478946 A CN113478946 A CN 113478946A
- Authority
- CN
- China
- Prior art keywords
- prepreg
- gap
- filling core
- composite material
- cutting
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000002131 composite material Substances 0.000 title claims abstract description 43
- 238000000034 method Methods 0.000 title claims abstract description 24
- 239000011162 core material Substances 0.000 claims abstract description 67
- 238000010438 heat treatment Methods 0.000 claims abstract description 8
- 238000001816 cooling Methods 0.000 claims abstract description 7
- 238000002844 melting Methods 0.000 claims abstract description 7
- 230000008018 melting Effects 0.000 claims abstract description 7
- 238000005498 polishing Methods 0.000 claims abstract description 5
- 239000000463 material Substances 0.000 claims description 19
- 238000003825 pressing Methods 0.000 claims description 6
- 238000007731 hot pressing Methods 0.000 claims description 4
- 238000004140 cleaning Methods 0.000 claims description 3
- 239000000835 fiber Substances 0.000 claims description 3
- 239000011159 matrix material Substances 0.000 claims description 3
- 238000010422 painting Methods 0.000 claims description 3
- 239000011347 resin Substances 0.000 claims description 3
- 229920005989 resin Polymers 0.000 claims description 3
- 239000000853 adhesive Substances 0.000 claims description 2
- 230000001070 adhesive effect Effects 0.000 claims description 2
- 239000010410 layer Substances 0.000 description 29
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 229910052742 iron Inorganic materials 0.000 description 2
- 238000010409 ironing Methods 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B43/00—Operations specially adapted for layered products and not otherwise provided for, e.g. repairing; Apparatus therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B43/00—Operations specially adapted for layered products and not otherwise provided for, e.g. repairing; Apparatus therefor
- B32B43/003—Cutting
Abstract
The invention discloses a repairing method of a sandwich composite material plate. (1) Cutting the single side or the double sides according to the damage condition of the sandwich composite material plate; (2) cutting filling core materials with the same size and shape as the gap, and filling the filling core materials in the gap; (3) cutting 1# prepreg with the same size and shape as the gap, wherein the number of the 1# prepreg is one when the prepreg is cut on one side, and the number of the 1# prepreg is two when the prepreg is cut on two sides; placing a piece of No. 1 prepreg above the gap filled with the core material, placing a layer of release film above the No. 1 prepreg, heating and melting the No. 1 prepreg, cooling, and then taking down the release film; (4) when cutting the single surface, the step is omitted; when double-sided cutting is carried out, the sandwich composite material plate is reversed, and another piece of No. 1 prepreg is attached to the other side of the filled core material according to the method in the step (3); (5) and polishing and finishing the notch to finish the repair. The overall appearance of the repaired plate is good.
Description
Technical Field
The invention belongs to the technical field of composite plates, and particularly relates to a repairing method of a sandwich composite plate.
Background
The sandwich composite material plate has the characteristics of light weight, high strength and easy processing, is widely used in the fields of airplanes, automobiles, household articles and the like, and particularly in the field of automobiles, people increasingly favor the use of the light-weight automobile body material. Inevitably, there will be some sheet material local damage of different degree that leads to because of collision, impact accident in use, therefore, consider the cost problem, often need to carry out local repair to the broken sheet material to resume normal use.
Disclosure of Invention
In view of the above-mentioned drawbacks and disadvantages of the prior art, an object of the present invention is to provide a method for repairing a sandwich composite material panel.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows:
a repair method of a sandwich composite material plate comprises panel layers on the upper side and the lower side and a sandwich layer positioned between the panel layers and the sandwich layer, wherein the panel layers are made of fiber reinforced resin matrix composite materials, and the repair method comprises the following steps:
(1) according to the damage condition of the sandwich composite material plate, performing single-sided cutting and hollowing or double-sided cutting and hollowing on the plate at the damaged part, and cleaning a notch formed by cutting; one surface of the damaged part of the sandwich composite material plate faces upwards, and the sandwich composite material plate to be clamped is placed on the supporting platform to be kept stable;
(2) cutting filling core materials with the same size and shape as the gap, wherein the filling core materials are the same as the material of the sandwich layer of the sandwich composite material plate, filling the filling core materials in the gap, and placing the filling core materials flatly;
(3) cutting 1# prepreg with the same size and shape as the gap, wherein the number of the 1# prepreg is one when the prepreg is cut on one side, the number of the 1# prepreg is two when the prepreg is cut on two sides, and the material of the 1# prepreg corresponds to the material of the panel layer of the sandwich composite material plate; placing a piece of No. 1 prepreg above the filling core material at the gap, placing a layer of release film above the No. 1 prepreg, heating and melting the No. 1 prepreg, pressing the prepreg until the prepreg is tightly attached to the filling core material, and cooling the prepreg and the release film;
(4) when single-side cutting is carried out, the step is omitted, and the next step is directly skipped; when double-sided cutting is carried out, the sandwich composite material plate to be repaired is reversed, the other side of the damaged part of the sandwich composite material plate faces upwards, the sandwich composite material plate to be repaired is placed on the supporting platform again to be kept stable, and the other side, filled with the core material, of the gap is attached with another piece of No. 1 prepreg according to the method in the step (3);
(5) and respectively polishing and painting the upper surface and the lower surface of the notch, and finishing the repair work of the damaged area at the moment.
Preferably, in the step (2), after the filling core material is cut, the periphery of the sandwich layer at the gap and the periphery of the filling core material are heated and softened respectively, and at the moment, the softened filling core material is filled in the softened gap and is placed flatly.
Preferably, in the step (1), after the gap is cleaned, a circle of 0# prepreg (the width of the prepreg is the same as the thickness of the sandwich layer) is attached to the inner side wall of the periphery of the sandwich layer at the gap, the material of the 0# prepreg is the same as that of the 1# prepreg, and then the 0# prepreg is bonded with the sandwich layer at the gap through hot pressing; correspondingly, in the step (2), when the filling core material is cut, the size of the filling core material is slightly smaller than that of the notch so as to ensure that the filling core material can be just filled in the notch, meanwhile, the periphery of the cut filling core material is heated and softened, and at the moment, the softened filling core material is filled in the notch and is placed flatly.
Preferably, in the step (3), while the 1# prepreg with the same size as the gap is cut, the 2# prepreg (the size of the 2# prepreg just covers the 1# prepreg) with a size slightly larger than the gap is cut, the 2# prepreg is made of the same material as the 1# prepreg, the number of the 2# prepregs is one when the single-side cutting is performed, and the number of the 2# prepregs is two when the double-side cutting is performed; firstly, placing a piece of No. 1 prepreg above the filling core material at the gap, placing a layer of release film above the No. 1 prepreg, heating and melting the No. 1 prepreg, pressing the prepreg until the prepreg is tightly attached to the filling core material, and cooling the prepreg and the release film; then, attaching a 2# prepreg on the basis of the 1# prepreg according to the method for attaching the 1# prepreg; correspondingly, in the step (4), another piece of the 1# prepreg and another piece of the 2# prepreg are attached to the other side of the core material with the gap filled in according to the method of the step (3).
Has the advantages that:
according to the repairing method of the sandwich composite material plate, provided by the invention, by filling the core material and then adhering the prepreg, on one hand, the panel layer is directly formed in the damaged area, and on the other hand, the panel layer is directly bonded with the edge of the notch, so that the purpose of filling the gap formed by splicing the core material and the surrounding plates in the damaged area is realized, and all gaps on the periphery of the damaged area can be filled only by adhering a surface layer (prepreg), therefore, a new connecting layer cannot be formed at the splicing gap, the polishing and the finishing are convenient, and the overall appearance of the repaired plate is good;
meanwhile, the filling core material filling the damaged part can be tightly attached to the material of the damaged area by using a bonding mode such as prepreg and adhesive besides being directly filled in the gap, and then the filling core material is stably bonded at the gap through hot-pressing curing, so that the gap between the two core materials is filled, the bonding force between the two core materials is increased, the mechanical property of the filling area is enhanced, and the overall mechanical property of the plate is improved.
Detailed Description
In order to make the invention clearer and clearer, the invention is further described in detail below. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Example 1
A repair method of a sandwich composite material plate comprises panel layers on the upper side and the lower side and a sandwich layer positioned between the panel layers and the sandwich layer, wherein the panel layers are made of fiber reinforced resin matrix composite materials, and the repair method comprises the following steps:
(1) according to the damage condition of the sandwich composite material plate, performing double-sided cutting and hollowing on the plate at the damaged part, and cleaning a notch formed by cutting; one surface of the damaged part of the sandwich composite material plate faces upwards, and the sandwich composite material plate to be clamped is placed on the supporting platform to be kept stable;
(2) cutting filling core materials with the same size and shape as the gap, wherein the filling core materials are the same as the material of the sandwich layer of the sandwich composite material plate, filling the filling core materials in the gap, and placing the filling core materials flatly;
(3) cutting 1# prepreg with the same size and shape as the gap, wherein the number of the 1# prepreg is two, and the material of the 1# prepreg corresponds to the material of the panel layer of the sandwich composite material plate; placing a piece of No. 1 prepreg above the filling core material at the gap, placing a layer of release film above the No. 1 prepreg, heating and melting the No. 1 prepreg by using an electric iron, pressing the prepreg until the prepreg is tightly attached to the filling core material, and cooling the prepreg and the release film;
(4) reversing the sandwich composite material plate to be repaired to enable the other side of the damaged part of the sandwich composite material plate to face upwards, placing the sandwich composite material plate to be repaired on the supporting platform again to keep stable, and attaching another piece of No. 1 prepreg to the other side, filled with the core material, of the gap according to the method in the step (3);
(5) and respectively polishing and painting the upper surface and the lower surface of the notch, and finishing the repair work of the damaged area at the moment.
Example 2
The difference from example 1 is that: in the step (1), after the gap is cleaned, a circle of 0# prepreg is attached to the inner side wall of the periphery of the sandwich layer at the gap, the 0# prepreg is made of the same material as the 1# prepreg, and then the 0# prepreg is bonded with the sandwich layer at the gap by hot pressing of an electric iron; correspondingly, in the step (2), a layer of 0# prepreg is attached to the notch to occupy a certain thickness, when the filling core material is cut, the size of the filling core material is slightly smaller than the size of the notch so as to ensure that the filling core material can be just filled in the notch, meanwhile, the periphery of the cut filling core material is heated and softened by using a hot air gun, so that the filling core material is plastic under the action of micro force, and at the moment, the softened filling core material is filled in the notch and is placed flatly. The other steps were the same as in example 1.
Example 3
The difference from example 1 is that: in the step (3), while cutting out 1# prepreg with the same size as the gap, cutting out 2# prepreg slightly larger than the gap, wherein the 2# prepreg is made of the same material as the 1# prepreg, and the number of the 2# prepregs is two; firstly, placing a piece of No. 1 prepreg above the filling core material at the gap, placing a layer of release film above the No. 1 prepreg, heating and melting the No. 1 prepreg by using a flat ironing machine, pressing the prepreg until the prepreg is tightly attached to the filling core material, and cooling the prepreg and removing the release film; then, attaching a 2# prepreg on the basis of the 1# prepreg according to the method for attaching the 1# prepreg; correspondingly, in the step (4), another piece of the 1# prepreg and another piece of the 2# prepreg are attached to the other side of the core material with the gap filled in according to the method of the step (3). The other steps were the same as in example 1.
Example 4
The difference from example 1 is that: in the step (1), cutting and excavating the single side of the plate at the damaged part; after cutting out the filling core materials, respectively heating and softening the periphery of the sandwich layer at the gap and the periphery of the filling core materials by using a hot air gun to enable the core materials to be plastic under the action of micro force, filling the softened filling core materials into the softened gap, and placing the filling core materials flatly; step (4) is omitted, and step (5) is performed directly after step (3). The other steps were the same as in example 1.
Claims (4)
1. The repairing method of the sandwich composite material plate comprises panel layers on the upper side and the lower side and a sandwich layer positioned between the panel layers and the sandwich layer, wherein the panel layers are made of fiber reinforced resin matrix composite materials, and is characterized by comprising the following steps:
(1) according to the damage condition of the sandwich composite material plate, performing single-sided cutting and hollowing or double-sided cutting and hollowing on the plate at the damaged part, and cleaning a notch formed by cutting; one surface of the damaged part of the sandwich composite material plate faces upwards, and the sandwich composite material plate to be clamped is placed on the supporting platform to be kept stable;
(2) cutting filling core materials with the same size and shape as the gap, wherein the filling core materials are the same as the material of the sandwich layer of the sandwich composite material plate, filling the filling core materials in the gap, and placing the filling core materials flatly;
(3) cutting 1# prepreg with the same size and shape as the gap, wherein the number of the 1# prepreg is one when the prepreg is cut on one side, the number of the 1# prepreg is two when the prepreg is cut on two sides, and the material of the 1# prepreg corresponds to the material of the panel layer of the sandwich composite material plate; placing a piece of No. 1 prepreg above the filling core material at the gap, placing a layer of release film above the No. 1 prepreg, heating and melting the No. 1 prepreg, pressing the prepreg until the prepreg is tightly attached to the filling core material, and cooling the prepreg and the release film;
(4) when single-side cutting is carried out, the step is omitted, and the next step is directly skipped; when double-sided cutting is carried out, the sandwich composite material plate to be repaired is reversed, the other side of the damaged part of the sandwich composite material plate faces upwards, the sandwich composite material plate to be repaired is placed on the supporting platform again to be kept stable, and the other side, filled with the core material, of the gap is attached with another piece of No. 1 prepreg according to the method in the step (3);
(5) and respectively polishing and painting the upper surface and the lower surface of the notch, and finishing the repair work of the damaged area at the moment.
2. The method for repairing a sandwich composite material panel according to claim 1, characterized in that: in the step (2), after the filling core materials are cut, the periphery of the sandwich layer at the gap and the periphery of the filling core materials are heated and softened respectively, and at the moment, the softened filling core materials are filled in the softened gap and are placed flatly.
3. The method for repairing a sandwich composite material panel according to claim 1, characterized in that: in the step (1), after the gap is cleaned, a circle of 0# prepreg or adhesive is attached to the inner side wall of the periphery of the sandwich layer at the gap, the 0# prepreg is made of the same material as the 1# prepreg, and then the 0# prepreg is bonded with the sandwich layer at the gap through hot pressing; correspondingly, in the step (2), when the filling core material is cut, the size of the filling core material is slightly smaller than that of the notch so as to ensure that the filling core material can be just filled in the notch, meanwhile, the periphery of the cut filling core material is heated and softened, and at the moment, the softened filling core material is filled in the notch and is placed flatly.
4. The method for repairing a sandwich composite material panel according to claim 1, characterized in that: in the step (3), while cutting out 1# prepreg with the same size as the gap, cutting out 2# prepreg slightly larger than the gap, wherein the 2# prepreg is made of the same material as the 1# prepreg, the number of the 2# prepreg is one when the single-side cutting is carried out, and the number of the 2# prepreg is two when the double-side cutting is carried out; firstly, placing a piece of No. 1 prepreg above the filling core material at the gap, placing a layer of release film above the No. 1 prepreg, heating and melting the No. 1 prepreg, pressing the prepreg until the prepreg is tightly attached to the filling core material, and cooling the prepreg and the release film; then, attaching a 2# prepreg on the basis of the 1# prepreg according to the method for attaching the 1# prepreg; correspondingly, in the step (4), another piece of the 1# prepreg and another piece of the 2# prepreg are attached to the other side of the core material with the gap filled in according to the method of the step (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110782122.0A CN113478946A (en) | 2021-07-12 | 2021-07-12 | Repairing method of sandwich composite material plate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110782122.0A CN113478946A (en) | 2021-07-12 | 2021-07-12 | Repairing method of sandwich composite material plate |
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| Publication Number | Publication Date |
|---|---|
| CN113478946A true CN113478946A (en) | 2021-10-08 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110782122.0A Pending CN113478946A (en) | 2021-07-12 | 2021-07-12 | Repairing method of sandwich composite material plate |
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| CN (1) | CN113478946A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114013170A (en) * | 2021-10-22 | 2022-02-08 | 中车工业研究院有限公司 | Damage repairing method for honeycomb sandwich structure composite material |
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| CA2314678A1 (en) * | 1999-07-30 | 2001-01-30 | Kawasaki Jukogyo Kabushiki Kaisha | Sandwich structure and method of repairing the same |
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| GB0921800D0 (en) * | 2009-12-14 | 2010-01-27 | Gurit Uk Ltd | Repair of composite materials |
| CN102632622A (en) * | 2012-05-03 | 2012-08-15 | 湖南欧亚碳纤维复合材料有限公司 | Fiber-reinforced resin-matrix composite furniture material and preparation method thereof |
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| CN108407340A (en) * | 2018-03-26 | 2018-08-17 | 南京航空航天大学 | Apparatus for coating and restorative procedure are quickly reviewed one's lessons by oneself in a kind of composite element outfield |
| CN110903683A (en) * | 2018-09-17 | 2020-03-24 | 航天特种材料及工艺技术研究所 | Composite material surface repairing method |
| CN112140596A (en) * | 2020-09-25 | 2020-12-29 | 中国直升机设计研究所 | Honeycomb sandwich structure penetrating damage repairing method |
-
2021
- 2021-07-12 CN CN202110782122.0A patent/CN113478946A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA2314678A1 (en) * | 1999-07-30 | 2001-01-30 | Kawasaki Jukogyo Kabushiki Kaisha | Sandwich structure and method of repairing the same |
| EP1972429A2 (en) * | 2007-03-23 | 2008-09-24 | United Technologies Corporation | Repair of a composite sandwich structure having a perforated skin |
| GB0921800D0 (en) * | 2009-12-14 | 2010-01-27 | Gurit Uk Ltd | Repair of composite materials |
| CN102632622A (en) * | 2012-05-03 | 2012-08-15 | 湖南欧亚碳纤维复合材料有限公司 | Fiber-reinforced resin-matrix composite furniture material and preparation method thereof |
| CN103042804A (en) * | 2013-01-17 | 2013-04-17 | 中国人民解放军国防科学技术大学 | Method for preparing composite material honeycomb sandwich pipe |
| CN103770346A (en) * | 2014-01-07 | 2014-05-07 | 杭州华聚复合材料有限公司 | Repairing method of thermoplastic cellular board |
| CN105173109A (en) * | 2014-06-06 | 2015-12-23 | 哈尔滨飞机工业集团有限责任公司 | Repairing method for honeycomb sandwich structure |
| CN108407340A (en) * | 2018-03-26 | 2018-08-17 | 南京航空航天大学 | Apparatus for coating and restorative procedure are quickly reviewed one's lessons by oneself in a kind of composite element outfield |
| CN110903683A (en) * | 2018-09-17 | 2020-03-24 | 航天特种材料及工艺技术研究所 | Composite material surface repairing method |
| CN112140596A (en) * | 2020-09-25 | 2020-12-29 | 中国直升机设计研究所 | Honeycomb sandwich structure penetrating damage repairing method |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114013170A (en) * | 2021-10-22 | 2022-02-08 | 中车工业研究院有限公司 | Damage repairing method for honeycomb sandwich structure composite material |
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