CN112147217A - Water spray penetration type ultrasonic detection method for vertical honeycomb splicing interface - Google Patents
Water spray penetration type ultrasonic detection method for vertical honeycomb splicing interface Download PDFInfo
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Abstract
A water spray penetration type ultrasonic detection method for a vertical honeycomb splicing interface comprises the following steps: vertically splicing the multilayer honeycomb structure; paving a layer of removable skin on the upper surface and the lower surface of the obtained multilayer honeycomb structure; carrying out primary curing treatment on the multilayer honeycomb structure paved with the removable skin; carrying out water spraying penetrating type ultrasonic C scanning detection on the multi-layer honeycomb structure after primary curing, and detecting whether all honeycomb splicing interfaces are debonded; if all honeycomb splicing interfaces do not have debonding defects, tearing off the removable skins on the upper and lower surfaces of the multilayer honeycomb structure; and adhering surface skins on the upper surface and the lower surface of the multilayer honeycomb structure, and carrying out secondary curing on the multilayer honeycomb structure adhered with the surface skins to obtain the vertically spliced multilayer honeycomb structure part. The vertical honeycomb splicing interface water spray penetration type ultrasonic detection method can ensure the quality of vertically spliced multilayer honeycomb sandwich structure parts, reduce the scrap risk of the multilayer honeycomb sandwich structure parts, and is beneficial to saving the production cost.
Description
Technical Field
The invention relates to the technical field of nondestructive testing, in particular to a water spray penetration type ultrasonic testing method for a vertical honeycomb splicing interface.
Background
In recent years, due to the development requirements of aerospace technology, composite materials have been rapidly developed, and various advanced composite materials and complex structural forms are replacing traditional airframe structural materials. The nondestructive detection method for the composite material structural part is most effective and convenient in ultrasonic detection, particularly for ultrasonic detection of a composite material honeycomb sandwich structure, and mainly takes water spray penetration type ultrasonic C scanning detection as a main detection method due to the particularity of the honeycomb structure.
Most of the traditional composite honeycomb sandwich structures are single-layer honeycomb sandwich structures, and with the continuous appearance of new structures of new processes, the composite materials of the vertically spliced multi-layer honeycomb sandwich structures are applied to parts of large airliners. The vertically-spliced multilayer honeycomb sandwich structure is completed by two-time curing, taking a three-layer honeycomb sandwich structure as an example, the three-layer honeycomb sandwich structure is longitudinally spliced by using an adhesive film in the vertical height direction of the honeycomb for the first time, the surface of the part of the three-layer honeycomb structure obtained by curing is a honeycomb, the surface of the part is not provided with skin, and the part of the three-layer honeycomb structure is obtained by bonding three bonded honeycombs with upper and lower skins through the second curing.
Because the multi-layer honeycomb sandwich structure after once curing has no surface skin, the upper and lower layers of honeycombs are directly exposed outside, and water spraying penetrating C scanning cannot be performed, in the prior art, water spraying penetrating ultrasonic C scanning detection is performed only on the multi-layer honeycomb sandwich structure parts which are vertically spliced after twice curing is completed, and once the defects of the multi-layer honeycomb sandwich structure parts are detected, the parts can only be scrapped, the rejection rate of the parts is high, and the production cost is influenced. Therefore, the existing water spray penetration type ultrasonic detection method for the vertical honeycomb splicing interface has the technical problems that whether the honeycomb splicing interface after primary curing is debonded or not can not be detected and monitored in advance, so that the scrapping risk of parts of a multilayer honeycomb sandwich structure is high, and the production cost is influenced.
Disclosure of Invention
The invention aims to provide a water spray penetration type ultrasonic detection method for a vertical honeycomb splicing interface, which can detect a vertically spliced multilayer honeycomb sandwich structure after primary curing, thereby ensuring the quality of vertically spliced multilayer honeycomb sandwich structure parts, reducing the scrap risk of the multilayer honeycomb sandwich structure parts and being beneficial to saving the production cost.
In order to achieve the purpose, the invention adopts the following technical scheme:
a water spray penetration type ultrasonic detection method for a vertical honeycomb splicing interface comprises the following steps:
vertically splicing the multilayer honeycomb structure;
paving a layer of removable skin on the upper surface and the lower surface of the obtained multilayer honeycomb structure;
carrying out primary curing treatment on the multilayer honeycomb structure paved with the removable skin;
carrying out water spraying penetrating type ultrasonic C scanning detection on the multi-layer honeycomb structure after primary curing, and detecting whether all honeycomb splicing interfaces are debonded;
if all honeycomb splicing interfaces do not have debonding defects, tearing off the removable skins on the upper and lower surfaces of the multilayer honeycomb structure;
and adhering surface skins on the upper surface and the lower surface of the multilayer honeycomb structure, and carrying out secondary curing on the multilayer honeycomb structure adhered with the surface skins to obtain the vertically spliced multilayer honeycomb structure part.
In one embodiment, after the step of performing water jet penetrating ultrasonic C-scan detection on the once cured multilayer honeycomb structure and detecting whether all honeycomb splicing interfaces are debonded, the method further includes: and if the honeycomb splicing interface has debonding defects, tearing off the removable skins on the upper surface and the lower surface of the multilayer honeycomb structure to repair the defects of the multilayer honeycomb structure.
In one embodiment, after the step of adhering the surface skins to the upper and lower surfaces of the multi-layer honeycomb structure and performing the second curing process on the multi-layer honeycomb structure with the surface skins adhered thereto to obtain the vertically-spliced multi-layer honeycomb structure part, the method further includes: and carrying out water spray penetrating type ultrasonic C scanning detection on the multi-layer honeycomb structural part subjected to secondary curing, and detecting whether all honeycomb splicing interfaces are debonded.
In one embodiment, the removable skin is made of removable cloth.
In one embodiment, the pleatable cloth is a wet pleatable cloth.
In one embodiment, the removable skin is made of release cloth with glue.
In one embodiment, the multilayer honeycomb structure is a three-layer honeycomb structure.
In one embodiment, the curing process comprises a thermal compression curing process or a high temperature curing process.
According to the vertical honeycomb splicing interface water spray penetration type ultrasonic detection method, a layer of wet strippable skin is bonded on the upper surface and the lower surface of the vertically spliced multilayer honeycomb structure before primary curing, so that the surface honeycomb of the once cured multilayer honeycomb structure is not exposed, the water spray penetration type ultrasonic C scanning detection on the once cured multilayer honeycomb structure can be realized, and the purpose of detecting the honeycomb splicing interface after primary curing is achieved. And after detection, the removable skin bonded on the surface of the honeycomb can be torn off, the original honeycomb exposed state can be recovered, and the bonding of the skin on the surface of the secondary curing surface is not influenced. Meanwhile, compared with the state that the surface skin is bonded after secondary curing, the honeycomb surface after sequential curing only has one layer of removable skin, the part is relatively thin, the attenuation is small during ultrasonic detection, the detection difficulty is small, and the detection precision is high. Experiments prove that the vertical honeycomb splicing interface water spray penetration type ultrasonic detection method can detect the debonding defects of all splicing interfaces of the vertically spliced multilayer honeycomb sandwich structure, and does not affect the secondary curing and bonding of parts to surface skins.
The vertical honeycomb splicing interface water spray penetration type ultrasonic detection method realizes advanced detection control of all splicing interfaces of the vertically spliced multilayer honeycomb structure after one-time curing, can ensure the quality of the vertically spliced multilayer honeycomb sandwich structure parts, reduces the scrap risk of the multilayer honeycomb sandwich structure parts, and is beneficial to saving the production cost.
Drawings
FIG. 1 is a flow chart of a water jet penetration ultrasonic testing method for a vertical honeycomb splice interface in one embodiment.
Detailed Description
The technical scheme of the invention is further explained by the specific implementation mode in combination with the attached drawings.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention.
Referring to fig. 1, an embodiment of a water spray penetration type ultrasonic detection method for a vertical honeycomb splicing interface includes the following steps:
step S11: and vertically splicing the multilayer honeycomb structure.
Specifically, the multilayer honeycomb structure is vertically spliced according to the part laying requirements, and in one embodiment, the multilayer honeycomb structure is a three-layer honeycomb structure.
Step S12: and paving a layer of removable skin on the upper surface and the lower surface of the obtained multilayer honeycomb structure.
In particular, the release skin may be torn off after curing, in one embodiment the release skin is made of a removable cloth, in particular a wet removable cloth. In another embodiment, the release sheet is made of a release cloth with glue.
Step S13: and carrying out primary curing treatment on the multilayer honeycomb structure paved with the removable skin.
Specifically, the first curing treatment is performed according to a part curing system, the curing treatment includes a hot-pressing curing treatment or a high-temperature curing treatment, and the specific curing treatment process is selected according to material characteristics, which is not specifically limited in this embodiment.
Step S14: and carrying out water spraying penetrating type ultrasonic C scanning detection on the multi-layer honeycomb structure after primary curing, and detecting whether all honeycomb splicing interfaces are debonded. The specific detection process and principle of the water spray penetration type ultrasonic C-scan detection are the same as those of the detection process and principle of the multi-layer honeycomb part after the secondary curing in the prior art, and are not repeated herein.
Step S15: and if all honeycomb splicing interfaces do not have debonding defects, tearing off the removable skins on the upper surface and the lower surface of the multilayer honeycomb structure, and then performing step S16.
Step S16: and adhering surface skins on the upper surface and the lower surface of the multilayer honeycomb structure, and carrying out secondary curing on the multilayer honeycomb structure adhered with the surface skins to obtain the vertically spliced multilayer honeycomb structure part.
And specifically, carrying out secondary curing treatment according to a part paving and pasting curing system, wherein the curing treatment comprises hot-pressing curing treatment or high-temperature curing treatment.
According to the vertical honeycomb splicing interface water spray penetration type ultrasonic detection method, a layer of wet strippable skin is bonded on the upper surface and the lower surface of the vertically spliced multilayer honeycomb structure before primary curing, so that the surface honeycomb of the once cured multilayer honeycomb structure is not exposed, the water spray penetration type ultrasonic C scanning detection on the once cured multilayer honeycomb structure can be realized, and the purpose of detecting the honeycomb splicing interface after primary curing is achieved. And after detection, the removable skin bonded on the surface of the honeycomb can be torn off, the original honeycomb exposed state can be recovered, and the bonding of the skin on the surface of the secondary curing surface is not influenced. Meanwhile, compared with the state that the skins on the surface are bonded after secondary curing, the honeycomb surface after sequential curing only has one layer of skin, the part is relatively thin, the attenuation is small during ultrasonic detection, the detection difficulty is small, and the detection effect is better. Experiments prove that the vertical honeycomb splicing interface water spray penetration type ultrasonic detection method can detect the debonding defects of all splicing interfaces of the vertically spliced three-layer honeycomb sandwich structure, and does not affect the secondary curing and bonding of parts to surface skins.
In one embodiment, after step S14, the method further includes the following steps: and if the honeycomb splicing interface has debonding defects, tearing off the removable skins on the upper surface and the lower surface of the multilayer honeycomb structure to repair the defects of the multilayer honeycomb structure. Further, repeating the steps S11 to S14 after the repair is completed, and executing the steps S15 to S16 until all honeycomb splicing interfaces have no debonding defect, so as to ensure the quality of the multilayer honeycomb structural part.
In one embodiment, step S16 is followed by the following steps:
step S17: and carrying out water spray penetrating type ultrasonic C scanning detection on the multi-layer honeycomb structural part subjected to secondary curing, and detecting whether all honeycomb splicing interfaces are debonded. Specifically, the multi-layer honeycomb structural part after secondary curing is subjected to water spraying penetrating type ultrasonic C scanning detection to ensure the quality of the multi-layer honeycomb structural part, and if the debonding defect does not exist in all honeycomb splicing interfaces, subsequent manufacturing procedures are performed to ensure the safety and reliability of product manufacturing.
The vertical honeycomb splicing interface water spray penetration type ultrasonic detection method realizes advanced detection control of all splicing interfaces of the vertically spliced multilayer honeycomb structure after one-time curing, can ensure the quality of the vertically spliced multilayer honeycomb sandwich structure parts, reduces the scrap risk of the multilayer honeycomb sandwich structure parts, and is beneficial to saving the production cost.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (8)
1. A water spray penetration type ultrasonic detection method for a vertical honeycomb splicing interface is characterized by comprising the following steps:
vertically splicing the multilayer honeycomb structure;
paving a layer of removable skin on the upper surface and the lower surface of the obtained multilayer honeycomb structure;
carrying out primary curing treatment on the multilayer honeycomb structure paved with the removable skin;
carrying out water spraying penetrating type ultrasonic C scanning detection on the multi-layer honeycomb structure after primary curing, and detecting whether all honeycomb splicing interfaces are debonded;
if all honeycomb splicing interfaces do not have debonding defects, tearing off the removable skins on the upper and lower surfaces of the multilayer honeycomb structure;
and adhering surface skins on the upper surface and the lower surface of the multilayer honeycomb structure, and carrying out secondary curing treatment on the multilayer honeycomb structure adhered with the surface skins to obtain the vertically spliced multilayer honeycomb structure part.
2. The method for detecting the water spray penetration type ultrasonic detection of the vertical honeycomb splicing interface according to claim 1, wherein after the step of performing the water spray penetration type ultrasonic C scanning detection on the multi-layer honeycomb structure after primary curing and detecting whether all honeycomb splicing interfaces are debonded, the method further comprises the following steps:
and if the honeycomb splicing interface has debonding defects, tearing off the removable skins on the upper surface and the lower surface of the multilayer honeycomb structure to repair the defects of the multilayer honeycomb structure.
3. The vertical honeycomb splicing interface water spray penetration type ultrasonic testing method according to claim 1 or 2, wherein after the step of attaching surface skins to the upper and lower surfaces of the multilayer honeycomb structure and performing the second curing treatment on the multilayer honeycomb structure with the surface skins attached thereto to obtain the vertically spliced multilayer honeycomb structure part, the method further comprises:
and carrying out water spray penetrating type ultrasonic C scanning detection on the multi-layer honeycomb structural part subjected to secondary curing, and detecting whether all honeycomb splicing interfaces are debonded.
4. The vertical honeycomb splicing interface water spray penetration type ultrasonic detection method according to claim 1 or 2, wherein the strippable skin is made of a drawable cloth.
5. The vertical honeycomb splicing interface water spray penetration type ultrasonic testing method according to claim 4, wherein the pokable cloth is wet pokable cloth.
6. The vertical honeycomb splicing interface water spray penetration type ultrasonic detection method according to claim 1 or 2, wherein the strippable skin is made of a release cloth with glue.
7. The vertical honeycomb splicing interface water spray penetration type ultrasonic detection method according to claim 1 or 2, wherein the multilayer honeycomb structure is a three-layer honeycomb structure.
8. The vertical honeycomb splicing interface water spray penetration type ultrasonic testing method according to claim 1 or 2, wherein the curing treatment comprises a hot press curing treatment or a high temperature curing treatment.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114166939A (en) * | 2021-11-02 | 2022-03-11 | 安徽佳力奇先进复合材料科技股份公司 | Method for detecting internal quality of composite material honeycomb sandwich structural member |
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| CN104990982A (en) * | 2015-07-31 | 2015-10-21 | 中航复合材料有限责任公司 | Automatic scanning-based cellular core sandwich structure ultrasonic imaging detection method |
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| CN109596707A (en) * | 2018-12-07 | 2019-04-09 | 中航复合材料有限责任公司 | It is a kind of based on position-ultrasonic signal honeycomb sandwich construction detection method |
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| CN104198585A (en) * | 2014-09-28 | 2014-12-10 | 中国电子科技集团公司第十四研究所 | Ultrasonic C scanning device for large-scale honeycomb C-interlayer revolution surface component |
| CN104990982A (en) * | 2015-07-31 | 2015-10-21 | 中航复合材料有限责任公司 | Automatic scanning-based cellular core sandwich structure ultrasonic imaging detection method |
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| CN109596707A (en) * | 2018-12-07 | 2019-04-09 | 中航复合材料有限责任公司 | It is a kind of based on position-ultrasonic signal honeycomb sandwich construction detection method |
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| CN114166939A (en) * | 2021-11-02 | 2022-03-11 | 安徽佳力奇先进复合材料科技股份公司 | Method for detecting internal quality of composite material honeycomb sandwich structural member |
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