CN111855798A - Detection device and detection method for edge defects of bonded composite board - Google Patents
Detection device and detection method for edge defects of bonded composite board Download PDFInfo
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- CN111855798A CN111855798A CN202010614666.1A CN202010614666A CN111855798A CN 111855798 A CN111855798 A CN 111855798A CN 202010614666 A CN202010614666 A CN 202010614666A CN 111855798 A CN111855798 A CN 111855798A
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- 239000002131 composite material Substances 0.000 title claims abstract description 88
- 230000007547 defect Effects 0.000 title claims abstract description 25
- 238000001514 detection method Methods 0.000 title claims abstract description 14
- 230000005284 excitation Effects 0.000 claims abstract description 25
- 230000007246 mechanism Effects 0.000 claims abstract description 18
- 238000000034 method Methods 0.000 claims description 6
- 230000035939 shock Effects 0.000 claims description 6
- 230000005611 electricity Effects 0.000 claims description 4
- 239000000463 material Substances 0.000 claims description 4
- 230000003247 decreasing effect Effects 0.000 claims description 3
- 229920000728 polyester Polymers 0.000 claims description 3
- 239000002905 metal composite material Substances 0.000 description 8
- 238000012360 testing method Methods 0.000 description 4
- 239000011248 coating agent Substances 0.000 description 3
- 238000000576 coating method Methods 0.000 description 3
- 150000001875 compounds Chemical class 0.000 description 3
- 239000000758 substrate Substances 0.000 description 3
- 229910000975 Carbon steel Inorganic materials 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 2
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- 239000011230 binding agent Substances 0.000 description 2
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- 238000013329 compounding Methods 0.000 description 2
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- 238000012372 quality testing Methods 0.000 description 2
- 239000010963 304 stainless steel Substances 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 229910001335 Galvanized steel Inorganic materials 0.000 description 1
- 229910000589 SAE 304 stainless steel Inorganic materials 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
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- 238000005260 corrosion Methods 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 238000013016 damping Methods 0.000 description 1
- 239000008397 galvanized steel Substances 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
- G01N29/04—Analysing solids
- G01N29/045—Analysing solids by imparting shocks to the workpiece and detecting the vibrations or the acoustic waves caused by the shocks
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
- G01N29/04—Analysing solids
- G01N29/12—Analysing solids by measuring frequency or resonance of acoustic waves
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2291/00—Indexing codes associated with group G01N29/00
- G01N2291/01—Indexing codes associated with the measuring variable
- G01N2291/014—Resonance or resonant frequency
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2291/00—Indexing codes associated with group G01N29/00
- G01N2291/02—Indexing codes associated with the analysed material
- G01N2291/023—Solids
- G01N2291/0231—Composite or layered materials
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2291/00—Indexing codes associated with group G01N29/00
- G01N2291/02—Indexing codes associated with the analysed material
- G01N2291/023—Solids
- G01N2291/0234—Metals, e.g. steel
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2291/00—Indexing codes associated with group G01N29/00
- G01N2291/02—Indexing codes associated with the analysed material
- G01N2291/028—Material parameters
- G01N2291/0289—Internal structure, e.g. defects, grain size, texture
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2291/00—Indexing codes associated with group G01N29/00
- G01N2291/26—Scanned objects
- G01N2291/263—Surfaces
- G01N2291/2632—Surfaces flat
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- Acoustics & Sound (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
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- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
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- Pathology (AREA)
- Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)
Abstract
The invention discloses a detection device and a detection method for edge defects of a bonded composite plate, and relates to the technical field of bonded composite plates, the detection device comprises a data display, a central processing unit, an excitation generator, a vibration exciter, a signal receiver and two steering clamping and conveying mechanisms, wherein the data display, the excitation generator and the signal receiver are all electrically connected with the central processing unit; the invention has the advantages of simple structure and convenience for detecting the edge defects of the composite board.
Description
Technical Field
The invention relates to the technical field of bonded composite plates, in particular to a device and a method for detecting edge defects of a bonded composite plate, which are used for detecting the edge defects of a bonded metal composite plate.
Background
A bonded metal composite plate is a layered metal composite plate formed by coating a binder on a carbon steel substrate and a clad plate by a coating machine and then bonding the carbon steel substrate and the clad plate after being compounded by a compound roller, wherein the substrate is usually a galvanized steel plate with low price and excellent corrosion resistance, the clad plate is usually stainless steel with high price or nonferrous metals such as an aluminum plate, copper, titanium and the like, the bonded metal composite plate is widely applied to the fields of architectural decoration and household appliances because of the advantages of excellent decoration and low cost, and meanwhile, the binder is a polymer and has certain damping characteristic and is applied to the fields of vibration reduction and noise reduction.
In the bonding and compounding process of the existing bonding metal composite plate, edge waves easily exist in the edge plate types of the base plate and the compound plate, so that the problem of the coating uniformity of the bonding agent exists, or the temperature of the edge of the base plate and the compound plate is reduced faster than that of the central part, the problem of poor bonding or even cracking of the edge is easy to occur, and the condition of poor quality of the bonding metal composite plate is caused.
At present, most of production lines for bonding metal composite plates are supplied in a state of continuously compounding into coils, however, no relevant testing equipment is available for carrying out edge nondestructive testing, so that quality testing personnel can only carry out sampling detection through the head and the tail of a coiled material, and a detection result is used as a judgment basis for judging whether the whole coil product is qualified or not. If the middle area of the composite board has edge layering or poor edge bonding, quality testing personnel cannot timely detect the poor edge layering or poor edge bonding, so that the quality of products leaving the factory cannot be guaranteed, on one hand, the use cost of customers can be increased, and on the other hand, the problem of quality objection can be caused.
Disclosure of Invention
The invention aims to: the invention provides a detection device and a detection method for edge defects of a bonded composite plate, aiming at solving the problem that no relevant test equipment is used for carrying out edge nondestructive detection on the bonded metal composite plate.
The invention specifically adopts the following technical scheme for realizing the purpose:
the utility model provides a detection apparatus for be used for bonding composite sheet limit portion defect, includes data display, central processing unit, shock generator, vibration exciter, signal receiver and two and turn to and press from both sides and send the mechanism, data display, shock generator and signal receiver all are connected with the central processing unit electricity, vibration exciter and shock generator electricity are connected, turn to for two and send and be equipped with the composite sheet between the mechanism, vibration exciter and signal receiver establish in the composite sheet both sides symmetrically, the equal perpendicular to composite sheet's of port of vibration exciter and signal receiver face and the two all points to the composite sheet's face.
Further, the steering pinch mechanism comprises two pinch rollers.
Further, the pinch roll is a polyester rubber roll.
Further, the distance between the vibration exciter and the composite plate is 0.5mm-1mm, and the distance between the signal receiver and the composite plate is 0.5mm-1 mm.
Further, the vibration exciter is an electromagnetic vibration exciter.
A method for detecting edge defects of a bonded composite plate comprises the following steps:
(1) selecting a standard sample, wherein the edge of the standard sample is free from defects, and the standard sample is as follows relative to a composite board to be detected: the base plate and the composite plate are made of the same material, the width specifications of the base plate and the composite plate are the same, and the thickness specifications of the base plate and the composite plate are the same;
(2) measuring the vibration curve of the standard sample, firstly calculating the 3-5 order theoretical resonance frequency of the standard sample by modal analysis, setting the theoretical resonance frequency of one order on a data display, transmitting the frequency signal to a vibration generator after being converted by a central processing unit, controlling the vibration generator to vibrate the edge of the standard sample according to the frequency so that the standard sample slightly resonates under the resonance frequency, receiving the vibration excitation signal of the standard sample by a signal receiver, then displaying the vibration excitation signal on the data display after being converted by the central processing unit, if the vibration curve displayed on the data display shows that the actual resonance frequency and the theoretical resonance frequency of the standard sample are different, increasing or decreasing 1Hz on the input theoretical resonance frequency until the vibration curve displayed on the data display shows that the actual resonance frequency and the theoretical resonance frequency of the standard sample are the same, at the moment, the frequency input on the data display is the actual resonance frequency of the standard sample, and the vibration curve corresponding to the actual resonance frequency is the vibration curve of the standard sample;
(3) Detecting the edge defects of the composite board, enabling the composite board to enter from one clamping and conveying mechanism and penetrate out from the other clamping and conveying mechanism, inputting the actual resonance frequency of a standard sample and the vibration curve of the standard sample on a data display, converting the signal input into the data display by a central processing unit and then transmitting the signal to an excitation generator, controlling the excitation generator to excite the edge of the composite board according to the frequency by the excitation generator, enabling the composite board to slightly resonate under the resonance frequency, receiving the excitation signal of the composite board by a signal receiver, converting the signal by the central processing unit and displaying the signal on the data display, comparing the vibration curve of the composite board with the vibration curve of the standard sample, if the two are almost consistent, enabling the edge of the composite board not to crack, and if the two are inconsistent, enabling the edge of the composite board to have the quality problem of.
Further, if the addition and subtraction of the input theoretical resonance frequency exceeds 3Hz, the theoretical resonance frequency of one order is reselected for input, and the vibration curve of the standard sample is measured in the step (2).
The invention has the following beneficial effects:
the invention has simple structure, can detect the edge defects of the composite board in the continuous production process of the composite board, and reduces the labor intensity of manual quality inspection.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic top view of the present invention;
FIG. 3 is a schematic structural view of a composite panel of the present invention;
FIG. 4 is a schematic structural view of a standard sample of the present invention;
FIG. 5 is a frequency domain scan of a sample of the composite panel of the present invention with unbonded edges;
FIG. 6 is a frequency domain scan of a sample of a composite panel of acceptable edge adhesion quality in accordance with the present invention;
reference numerals: 1-data display, 2-central processing unit, 3-excitation generator, 4-cable, 5-vibration exciter, 6-pinch roll, 7-composite plate, 8-signal receiver, 9-composite plate, 10-adhesive layer, 11-edge defect and 12-base plate.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures. Furthermore, the terms "first," "second," and the like are used merely to distinguish one description from another, and are not to be construed as indicating or implying relative importance.
In the description of the embodiments of the present invention, it should be noted that the terms "inside", "outside", "upper", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings or orientations or positional relationships conventionally arranged when products of the present invention are used, and are only used for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the devices or elements indicated must have specific orientations, be constructed in specific orientations, and operated, and thus, cannot be construed as limiting the present invention.
Example 1
As shown in fig. 1 to 6, the present embodiment provides a device for detecting edge defects of bonded composite boards, including a data display 1, a central processing unit 2, an exciter 3, an exciter 5, a signal receiver 8, and two steering and clamping mechanisms, where the data display 1, the exciter 3, and the signal receiver 8 are all electrically connected to the central processing unit 2, the exciter 5 and the exciter 3 are electrically connected, a composite board 7 is disposed between the two steering and clamping mechanisms, the exciter 5 and the signal receiver 8 are symmetrically disposed on two sides of the composite board 7, ports of the exciter 5 and the signal receiver 8 are perpendicular to a board surface of the composite board 7 and both point at the board surface of the composite board 7, the composite board 7 includes a composite board 9, an adhesive layer 10, and a base board 12, and electrical connection between electrical components is completed through a cable 4.
Example 2
As shown in fig. 1 to 6, the present embodiment is further improved on the basis of embodiment 1, and specifically, the turning pinch mechanism includes two pinch rollers 6.
Preferably, the pinch roll 6 is a polyester rubber roll.
Example 3
As shown in fig. 1 to 6, this embodiment is further improved based on embodiment 1, specifically, the distance between the exciter 5 and the composite plate 7 is 0.5mm to 1mm, and the distance between the signal receiver 8 and the composite plate 7 is 0.5mm to 1 mm.
Preferably, the exciter 5 is an electromagnetic exciter 5.
Example 4
As shown in fig. 1 to 6, the present embodiment provides a method for detecting edge defects of an adhesive composite plate, including the following steps:
(1) selecting a standard sample, wherein the edge of the standard sample is free from defects, and the standard sample is as follows relative to the composite board 7 to be detected: the base plate 12 and the composite plate 9 are made of the same material, the width specifications of the base plate 12 and the composite plate 9 are the same, and the thickness specifications of the base plate 12 and the composite plate 9 are the same;
(2) measuring the vibration curve of the standard sample, firstly calculating 3-5 orders of theoretical resonance frequency of the standard sample through modal analysis, wherein the theoretical resonance frequency is 13.987Hz, 15.421Hz and 17.71Hz respectively, setting the theoretical resonance frequency of one order on a data display 1, transmitting the frequency signal to an excitation generator 3 after being converted by a central processing unit 2, controlling the excitation generator 3 to excite the edge of the standard sample according to the frequency so that the standard sample generates slight resonance under the resonance frequency, receiving the excitation signal of the standard sample by a signal receiver 8, then converting and displaying the excitation signal on the data display 1 through the central processing unit 2, if the vibration curve displayed on the data display 1 shows that the actual resonance frequency and the theoretical resonance frequency of the standard sample are different, increasing or decreasing 1Hz on the input theoretical resonance frequency, until the vibration curve displayed on the data display 1 shows that the actual resonance frequency of the standard sample is the same as the input theoretical resonance frequency, the frequency input on the data display 1 is the actual resonance frequency of the standard sample, and the vibration curve corresponding to the actual resonance frequency is the vibration curve of the standard sample;
(3) Detecting edge defects of the composite plate 7, enabling the composite plate 7 to enter from one clamping and conveying mechanism and to penetrate out from the other clamping and conveying mechanism, the actual resonance frequency of the standard sample and the vibration curve of the standard sample are input on the data display 1, the signal input into the data display 1 is transmitted to the vibration generator 3 after being converted by the central processing unit 2, the vibration generator 3 controls the vibration exciter 5 to vibrate the edge of the composite plate 7 according to the frequency, so that the composite board 7 generates slight resonance under the resonance frequency, the signal receiver 8 receives the excitation signal of the composite board 7, then the excitation signal is converted and displayed on the data display 1 through the central processing unit 2, then the vibration curve of the composite board 7 is compared with the vibration curve of the standard sample, if the two are almost consistent, the edges of the composite sheet 7 do not crack, and if the edges are inconsistent, the quality of the edges of the composite sheet 7 is not adhered.
Specifically, a galvanized plate with the thickness of 0.9mm and the width of 1250mm is selected as a base plate 12, 304 stainless steel with the thickness of 0.25mm and the width of 1250mm is selected as a clad plate 9, the galvanized plate and the clad plate are processed into a composite plate 7 through an adhesive, the composite plate 7 is cut into the composite plate 7 with the length of 1000mm and the width of 1219mm through edge cutting tests, the composite plate 7 enters from one clamping and conveying mechanism and penetrates out from the other clamping and conveying mechanism, sample cutting tests are carried out on the composite plate 7 with non-adhesion at the edge part and the composite plate 7 with qualified edge adhesion quality, the sample size is 12.7mm x 241mm, then frequency domain scanning is carried out on the two samples, the scanning results are shown in fig. 5 and 6, and the resonance peaks of the two samples are not consistent according to fig. 5 and 6.
Claims (6)
1. The utility model provides a detection apparatus for be used for bonding composite sheet limit portion defect, its characterized in that, including data display (1), central processing unit (2), shock generator (3), vibration exciter (5), signal receiver (8) and two turn to press from both sides and send the mechanism, data display (1), shock generator (3) and signal receiver (8) all are connected with central processing unit (2) electricity, vibration exciter (5) and shock generator (3) electricity are connected, turn to for two and send and be equipped with composite sheet (7) between the mechanism, vibration exciter (5) and signal receiver (8) are established in composite sheet (7) both sides symmetrically, the equal perpendicular to face of composite sheet (7) of port of vibration exciter (5) and signal receiver (8) and the face of the two all directional composite sheet (7).
2. A device for detecting edge defects of bonded composite panels as claimed in claim 1, wherein said diverting and pinching mechanism comprises two pinch rolls (6).
3. The device for detecting edge defects of bonded composite plates according to claim 2, wherein the pinch roll (6) is a polyester rubber roll.
4. A device for detecting edge defects of bonded composite panels according to any one of claims 1 to 3, wherein the distance between the exciter (5) and the composite panel (7) is between 0.5mm and 1mm, and the distance between the signal receiver (8) and the composite panel (7) is between 0.5mm and 1 mm.
5. A device for detecting edge defects of bonded composite panels according to any one of claims 1 to 3, wherein said exciter (5) is an electromagnetic exciter (5).
6. A method for detecting edge defects of a bonded composite plate comprises the following steps:
(1) selecting a standard sample, wherein the edge of the standard sample is free from defects, and the standard sample is compared with a composite board (7) to be detected: the base plate (12) and the composite plate (9) are made of the same material, the width specifications of the base plate (12) and the composite plate (9) are the same, and the thickness specifications of the base plate (12) and the composite plate (9) are the same;
(2) measuring a vibration curve of a standard sample, firstly calculating theoretical resonance frequencies of 3-5 orders of the standard sample through modal analysis, setting the theoretical resonance frequency of one order on a data display (1), converting a frequency signal through a central processing unit (2), transmitting the frequency signal to an excitation generator (3), controlling the excitation generator (3) to excite the edge of the standard sample according to the frequency by using an excitation exciter (5) so that the standard sample generates slight resonance under the resonance frequency, receiving an excitation signal of the standard sample by using a signal receiver (8), converting and displaying the excitation signal on the data display (1) through the central processing unit (2), and increasing or decreasing 1Hz on the input theoretical resonance frequency if the vibration curve displayed on the data display (1) shows that the actual resonance frequency and the theoretical resonance frequency of the standard sample are different, until the vibration curve displayed on the data display (1) shows that the actual resonance frequency of the standard sample is the same as the theoretical resonance frequency, the frequency input on the data display (1) is the actual resonance frequency of the standard sample, and the vibration curve corresponding to the actual resonance frequency is the vibration curve of the standard sample;
(3) Detecting edge defects of a composite plate (7), enabling the composite plate (7) to enter from one clamping and conveying mechanism and penetrate out from the other clamping and conveying mechanism, inputting the actual resonance frequency of a standard sample and the vibration curve of the standard sample on a data display (1), converting a signal input into the data display (1) through a central processing unit (2) and then transmitting the signal to an excitation generator (3), controlling the excitation generator (3) to excite the edge of the composite plate (7) according to the frequency by using an excitation exciter (5), enabling the composite plate (7) to slightly resonate at the resonance frequency, receiving an excitation signal of the composite plate (7) by using a signal receiver (8), converting the excitation signal through the central processing unit (2) and displaying the excitation signal on the data display (1), comparing the vibration curve of the composite plate (7) with the vibration curve of the standard sample, and if the two vibration curves are almost consistent, the edge of the composite plate (7) is not cracked, and if the edge of the composite plate (7) is inconsistent, the quality problem of non-bonding exists.
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| 白江虎等: "减振复合板阻尼测试样品模态分析及尺寸确定", 《中国冶金》, vol. 29, no. 2, pages 45 - 49 * |
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