CN116698739A - Large-load scratch device and method for coating adhesion test - Google Patents
Large-load scratch device and method for coating adhesion test Download PDFInfo
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- CN116698739A CN116698739A CN202310309998.2A CN202310309998A CN116698739A CN 116698739 A CN116698739 A CN 116698739A CN 202310309998 A CN202310309998 A CN 202310309998A CN 116698739 A CN116698739 A CN 116698739A
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- 238000012360 testing method Methods 0.000 title claims abstract description 75
- 238000000576 coating method Methods 0.000 title claims abstract description 34
- 239000011248 coating agent Substances 0.000 title claims abstract description 33
- 238000000034 method Methods 0.000 title claims abstract description 19
- 238000001514 detection method Methods 0.000 claims abstract description 24
- 239000000853 adhesive Substances 0.000 claims abstract description 6
- 230000001070 adhesive effect Effects 0.000 claims abstract description 6
- 229910003460 diamond Inorganic materials 0.000 claims description 28
- 239000010432 diamond Substances 0.000 claims description 28
- 230000008859 change Effects 0.000 claims description 6
- 230000008569 process Effects 0.000 claims description 6
- 230000000704 physical effect Effects 0.000 claims description 4
- 238000011900 installation process Methods 0.000 claims description 3
- 239000012188 paraffin wax Substances 0.000 claims description 3
- 239000011247 coating layer Substances 0.000 claims 2
- 230000001105 regulatory effect Effects 0.000 claims 1
- 239000000463 material Substances 0.000 abstract description 11
- 238000010586 diagram Methods 0.000 description 3
- 238000004458 analytical method Methods 0.000 description 2
- 238000013459 approach Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000007373 indentation Methods 0.000 description 2
- 238000003780 insertion Methods 0.000 description 2
- 230000037431 insertion Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000005236 sound signal Effects 0.000 description 2
- 230000003321 amplification Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000011153 ceramic matrix composite Substances 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000035772 mutation Effects 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 239000005304 optical glass Substances 0.000 description 1
- 238000011002 quantification Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- UONOETXJSWQNOL-UHFFFAOYSA-N tungsten carbide Chemical compound [W+]#[C-] UONOETXJSWQNOL-UHFFFAOYSA-N 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
- G01N19/00—Investigating materials by mechanical methods
- G01N19/06—Investigating by removing material, e.g. spark-testing
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/02—Details
- G01N3/06—Special adaptations of indicating or recording means
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/06—Indicating or recording means; Sensing means
- G01N2203/0658—Indicating or recording means; Sensing means using acoustic or ultrasonic detectors
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/06—Indicating or recording means; Sensing means
- G01N2203/067—Parameter measured for estimating the property
- G01N2203/0676—Force, weight, load, energy, speed or acceleration
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- Biochemistry (AREA)
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- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The application provides a large-load scratch device and a method for testing coating adhesive force, wherein the test device specifically comprises the following components: the device comprises an x-axis precise positioning unit, a y-axis precise positioning unit, a z-axis precise positioning and loading unit, an acoustic signal detection unit and a three-dimensional force signal detection unit. The acoustic signal detection unit is arranged on the z-axis precise positioning and loading unit, the three-dimensional force signal detection unit is arranged on the y-axis precise positioning unit, and the y-axis precise positioning unit is arranged on the x-axis precise positioning unit. The application combines the acoustic signal detection unit with the micrometer scratch test, and carries out reasonable structural design, thereby avoiding the direct impact influence of the load on the acoustic sensor, obtaining more accurate coating breaking points and improving the test precision. The device has a large-range three-degree-of-freedom positioning capability and a large-range loading capability, and provides technical support for testing the surface characteristics of the high-strength and high-hardness coating material.
Description
Technical Field
The application relates to the field of electromechanical integrated precise instruments, in particular to a high-load scratch device and method for testing coating adhesive force.
Background
The mechanical properties of the materials can directly influence the service life of the materials, and with the continuous progress of modern technology, particularly the rapid development of technologies in the fields of vehicles, biomedicine, aerospace and the like, the selection of the materials is more severe, and the requirements on the properties and the process of the materials are higher. Performance analysis of high hardness materials, represented by optical glass, tungsten carbide coatings, and ceramic matrix composites, has become a major issue in these high precision tip fields. The scratch test can effectively analyze important physical properties such as the strength, hardness, coating adhesion and the like of the material, and has the advantages of simplicity and convenience in operation, quantification, comparison and the like. However, in the current measurement test for the adhesion of the coating, the abrupt friction force is often used as a critical load for evaluating the coating, which directly affects the accuracy of the scratch test result.
Disclosure of Invention
Based on the reasons, the application aims to provide the large-load scratch device and the method for testing the adhesive force of the coating, which solve the problems existing in the prior art, improve the detection accuracy, enlarge the load adjusting range, simply realize the scratch test of the coating material, and have wide research value and application prospect in the fields of vehicles, biomedicine, aerospace and the like.
In order to achieve the above purpose, the present application is realized by the following technical scheme:
the large-load scratch device for coating adhesion test comprises an x-axis precise positioning unit 1, a y-axis precise positioning unit 2, a three-dimensional force signal detection unit 3, an acoustic signal detection unit 4, a z-axis precise positioning and loading unit 5 and a portal frame 6. Wherein the acoustic signal detection unit 4 is arranged on the z-axis precise positioning and loading unit 5; the three-dimensional force signal detection unit 3 is arranged on the y-axis precise positioning unit 2; the y-axis precise positioning unit 2 is arranged on the x-axis precise positioning unit 1; the x-axis precise positioning unit 1 and the z-axis precise positioning and loading unit 5 are mounted on the gantry 6. The x-axis precise positioning unit 1, the y-axis precise positioning unit 2 and the z-axis precise positioning and loading unit 5 are identical in structure. The overall size of the device is 512.5mm multiplied by 430mm multiplied by 690mm, and the corresponding scratch test can be performed after the device is assembled.
The three-dimensional force signal detection unit 3 consists of a bottom plate 301, a three-dimensional force sensor 302 and an objective table 303. Wherein a three-dimensional force sensor 302 is mounted on a base plate 301; the stage is mounted on a three-dimensional force sensor 302.
The acoustic signal detection unit 4 is composed of a pressure head clamping plate 401, a screw a402, an acoustic sensor fixing clamping plate 403, an acoustic sensor 404, an acoustic sensor embedding groove 405, a Rockwell diamond pressure head 406, a screw b407 and a screw c 408. Wherein the acoustic sensor 404 is inserted into the acoustic sensor insertion groove 405 and preloaded by the acoustic sensor fixing clamp plate 403 and the screw a 402; the acoustic sensor embedding groove 405 is arranged right in front of the pressure head clamping plate 401 and is preloaded through the screw c408, so that direct impact influence on the acoustic sensor 404 due to overlarge load in the test process is avoided; the Rockwell diamond indenter 406 is mounted directly below the indenter clamping plate 401 and is preloaded by a screw b 407. The abrupt point of the acoustic sensor feedback signal is the critical load that the coating material can bear. The specific adjustment method comprises the following steps: the z-axis precise positioning and loading unit 5 is adjusted so that the Rockwell diamond indenter 406 approaches the test piece, whether the Rockwell diamond indenter 406 is in contact with the test piece is initially judged by the three-dimensional force sensor 302, when the three-dimensional force sensor 302 has a signal change, it is indicated that the Rockwell diamond indenter 406 is in contact with the test piece, if the test piece has been in contact, the z-axis precise positioning and loading unit 5 is reversely adjusted so that the acoustic signal detecting unit 4 moves a distance (5 μm-10 μm) in the reverse direction, the position is defined as an initial position, and then the test piece can be ready to be pressed.
Another object of the present application is to provide a method for scratch testing of a high load scratch device for coating adhesion testing, comprising the steps of:
a) The high load scoring apparatus for coating adhesion testing of claim 1 is mounted on a flat test stand.
b) Adhering the test piece to the objective table 303 by using molten paraffin, and keeping the test piece flat during the installation process;
c) The x-axis precise positioning unit 1 and the y-axis precise positioning unit 2 are adjusted so that the test piece is directly under the rockwell diamond indenter 406.
d) The z-axis precise positioning and loading unit 5 is adjusted so that the Rockwell diamond indenter 406 slowly contacts the test piece, contact between the test piece and the Rockwell diamond indenter 406 is judged by observing the indication of the three-dimensional force sensor 302, and when the test piece is not contacted, the indication of the three-dimensional force sensor 302 is kept stable, and when the indication of the three-dimensional force sensor 302 changes, the indication indicates that the test piece is contacted with the Rockwell diamond indenter 406 at the moment.
e) The z-axis precision positioning and loading unit 5 is adjusted in reverse so that the Rockwell diamond indenter 406 is spaced from the surface of the test piece and a distance (5 μm-10 μm) therefrom.
f) The z-axis precise positioning and loading unit 5 is controlled to slowly press down at a constant speed, meanwhile, the x-axis precise positioning unit 1 or the y-axis precise positioning unit 2 is controlled to move according to a set scratch speed, when a load is loaded to a coating to break, an abrupt change point is generated when the sound sensor collects signals, in the process, the three-dimensional force sensor 302 and the sound sensor 404 amplify and convert voltage signals into digital signals through the signal amplifying module so as to obtain feedback information, and the physical properties such as adhesive force of the coating can be judged by combining force signals and sound signals fed back by the three-dimensional force sensor 302 and the sound sensor 404.
The application has the beneficial effects that: the high-load scratch device and the method for testing the coating adhesion force fundamentally avoid the phenomenon that the abrupt friction force is observed as a standard for judging the critical load born by the coating. The acoustic sensor arranged on the pressure head clamping plate can accurately judge the change of the signal when the coating is broken, the critical load born by the coating can be found through the signal mutation points fed back, the loading load range is enlarged, and the material with higher hardness can be tested. And the device structure improves the test precision and simplifies the test steps. The scratch force loading unit is controlled, so that the testing of rich test conditions such as different loading rates, different indentation loads, different indentation depths and the like can be realized. The three-dimensional force sensor and the acoustic sensor in the device amplify and convert the voltage signal into a digital signal through the signal amplification module so as to obtain a feedback load and an acoustic signal, and the follow-up analysis is carried out according to the data such as the pressing depth and the load generated by the feedback.
Drawings
The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this specification, illustrate and explain the application and together with the description serve to explain the application.
FIG. 1 is a schematic diagram of the overall structure of a high load scoring apparatus and method for coating adhesion testing of the present application;
FIG. 2 is a schematic diagram of a three-dimensional force signal detecting unit according to the present application;
fig. 3 is a schematic diagram of the structure of the acoustic signal detecting unit of the present application.
In the figure: 301 a base plate; 302 a three-dimensional force sensor; 303 stage; 401 a pressure head clamping plate; 402 screw a;403 an acoustic sensor fixing clamp plate; 404 an acoustic sensor; 405 an acoustic sensor insert groove; 406 Rockwell diamond indenter; 407 screw b;408 screw c.
Detailed Description
The details of the present application and its specific embodiments are further described below with reference to the accompanying drawings.
Referring to fig. 1 to 3, the high load scratch device for coating adhesion test in the application comprises an x-axis precise positioning unit 1, a y-axis precise positioning unit 2, a three-dimensional force signal detection unit 3, an acoustic signal detection unit 4, a z-axis precise positioning and loading unit 5 and a portal frame 6. Wherein the acoustic signal detection unit 4 is arranged on the z-axis precise positioning and loading unit 5; the three-dimensional force signal detection unit 3 is arranged on the y-axis precise positioning unit 2; the y-axis precise positioning unit 2 is arranged on the x-axis precise positioning unit 1; the x-axis precise positioning unit 1 and the z-axis precise positioning and loading unit 5 are mounted on the gantry 6. The x-axis precise positioning unit 1, the y-axis precise positioning unit 2 and the z-axis precise positioning and loading unit 5 are identical in structure. The overall dimensions of the device were 512.5mm by 430mm by 690mm. After the device is assembled, a corresponding scratch test can be performed.
The three-dimensional force signal detection unit 3 consists of a bottom plate 301, a three-dimensional force sensor 302 and an objective table 303. Wherein a three-dimensional force sensor 302 is mounted on a base plate 301; the stage is fixed to the three-dimensional force sensor 302.
The acoustic signal detection unit 4 is composed of a pressure head clamping plate 401, a screw a402, an acoustic sensor fixing clamping plate 403, an acoustic sensor 404, an acoustic sensor embedding groove 405, a Rockwell diamond pressure head 406, a screw b407 and a screw c 408. Wherein the acoustic sensor 404 is inserted into the acoustic sensor insertion groove 405 and preloaded by the acoustic sensor fixing clamp plate 403 and the screw a 402; the acoustic sensor embedding groove 405 is arranged right in front of the pressure head clamping plate 401 and is preloaded through the screw c408, so that direct impact influence on the acoustic sensor 404 due to overlarge load in the test process is avoided; the Rockwell diamond indenter 406 is mounted directly below the indenter clamping plate 401 and is preloaded by a screw b 407. The abrupt point of the acoustic sensor feedback signal is the critical load that the coating material can bear. The specific adjustment method comprises the following steps: the z-axis precise positioning and loading unit 5 is adjusted so that the Rockwell diamond indenter 406 approaches the test piece, whether the Rockwell diamond indenter 406 is in contact with the test piece is initially judged by the three-dimensional force sensor 302, when the three-dimensional force sensor 302 has a signal change, it is indicated that the Rockwell diamond indenter 406 is in contact with the test piece, if the test piece has been in contact, the z-axis precise positioning and loading unit 5 is reversely adjusted so that the acoustic signal detecting unit 4 moves a distance (5 μm-10 μm) in the reverse direction, the position is defined as an initial position, and then the test piece is ready to be pressed.
The method for carrying out scratch test by using the high-load scratch device for coating adhesion test comprises the following test procedures:
a) The high load scoring apparatus for coating adhesion testing of claim 1 is mounted on a flat test stand.
b) Adhering the test piece to the objective table 303 by using molten paraffin, and keeping the test piece flat during the installation process;
c) The x-axis precise positioning unit 1 and the y-axis precise positioning unit 2 are adjusted so that the test piece is directly under the rockwell diamond indenter 406.
d) The z-axis precise positioning and loading unit 5 is adjusted so that the Rockwell diamond indenter 406 slowly contacts the test piece, contact between the test piece and the Rockwell diamond indenter 406 is judged by observing the indication of the three-dimensional force sensor 302, and when the test piece is not contacted, the indication of the three-dimensional force sensor 302 is kept stable, and when the indication of the three-dimensional force sensor 302 changes, the indication indicates that the test piece is contacted with the Rockwell diamond indenter 406 at the moment.
e) The z-axis precision positioning and loading unit 5 is adjusted in reverse so that the Rockwell diamond indenter 406 is spaced from the surface of the test piece and a distance (5 μm-10 μm) therefrom.
f) The z-axis precise positioning and loading unit 5 is controlled to slowly press down at a constant speed, meanwhile, the x-axis precise positioning unit 1 or the y-axis precise positioning unit 2 is controlled to move according to a set scratch speed, when a load is loaded to a coating to break, an abrupt change point is generated when the sound sensor collects signals, in the process, the three-dimensional force sensor 302 and the sound sensor 404 amplify and convert voltage signals into digital signals through the signal amplifying module so as to obtain feedback information, and the physical properties such as adhesive force of the coating can be judged by combining force signals and sound signals fed back by the three-dimensional force sensor 302 and the sound sensor 404.
The above description is only a preferred example of the present application and is not intended to limit the present application, but various modifications and variations can be made to the present application by those skilled in the art. Any modification, replacement, improvement, etc. of the present application should be included in the protection scope of the present application.
Claims (4)
1. A big load mar device for coating adhesion test, its characterized in that: the device comprises an x-axis precise positioning unit (1), a y-axis precise positioning unit (2), a three-dimensional force signal detection unit (3), an acoustic signal detection unit (4), a z-axis precise positioning and loading unit (5) and a portal frame (6); wherein the acoustic signal detection unit (4) is arranged on the z-axis precise positioning and loading unit (5); the three-dimensional force signal detection unit (3) is arranged on the y-axis precise positioning unit (2); the y-axis precise positioning unit (2) is arranged on the x-axis precise positioning unit (1); the x-axis precise positioning unit (1) and the z-axis precise positioning and loading unit (5) are arranged on the portal frame (6); the x-axis precise positioning unit (1), the y-axis precise positioning unit (2) and the z-axis precise positioning and loading unit (5) are identical in structure.
2. A high load scoring apparatus for coating adhesion testing according to claim 1, wherein: the three-dimensional force signal detection unit (3) consists of a bottom plate (301), a three-dimensional force sensor (302) and an objective table (303); wherein the three-dimensional force sensor (302) is mounted on the base plate (301); the stage is mounted on a three-dimensional force sensor (302).
3. A high load scoring apparatus for coating adhesion testing according to claim 1, wherein: the acoustic signal detection unit (4) consists of a pressure head clamping plate (401), a screw a (402), an acoustic sensor fixing clamp plate (403), an acoustic sensor (404), an acoustic sensor embedded groove (405), a Rockwell diamond pressure head (406), a screw b (407) and a screw c (408); wherein the acoustic sensor (404) is embedded in the acoustic sensor embedding groove (405) and is preloaded by the acoustic sensor fixing clamp plate (403) and the screw a (402); the acoustic sensor embedding groove (405) is arranged right in front of the pressure head clamping plate (401) and is preloaded through a screw c (408); the Rockwell diamond indenter (406) is arranged right below the indenter clamping plate (401) and is pre-tightened by a screw b (407).
4. A method for scratch testing using a high load scratch device for coating adhesion testing as defined in claim 1, characterized by: the method comprises the following steps:
a) Fixing the high load scratch device for coating adhesion test of claim 1 on a flat test bench;
b) Adhering a test piece to an objective table (303) by using molten paraffin, and keeping the test piece flat in the installation process;
c) The X-axis precise positioning unit (1) and the Y-axis precise positioning unit (2) are regulated so that the test piece is positioned right below the Rockwell diamond pressing head (406);
d) The z-axis precise positioning and loading unit (5) is adjusted, so that the Rockwell diamond indenter (406) slowly contacts the test piece, the contact between the test piece and the Rockwell diamond indenter (406) is judged by observing the indication of the three-dimensional force sensor (302), when the test piece is not contacted, the indication of the three-dimensional force sensor (302) is kept stable, and when the indication of the three-dimensional force sensor (302) changes, the test piece is indicated to be contacted with the Rockwell diamond indenter (406) at the moment;
e) The z-axis precise positioning and loading unit (5) is reversely adjusted so that the Rockwell diamond indenter (406) is separated from the surface of the test piece and keeps a distance (5-10 μm) from the surface of the test piece;
f) The z-axis precise positioning and loading unit (5) is controlled to slowly press down at a constant speed, meanwhile, the x-axis precise positioning unit (1) or the y-axis precise positioning unit (2) is controlled to move according to a set scratch speed, when a load is loaded to a coating layer to be broken, an abrupt change point is generated in the process of collecting signals by the acoustic sensor, the three-dimensional force sensor (302) and the acoustic sensor (404) amplify and convert voltage signals into digital signals through the signal amplifying module so as to obtain feedback information, and the physical properties such as adhesive force of the coating layer can be judged by combining force signals and acoustic signals fed back by the three-dimensional force sensor (302) and the acoustic sensor (404).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310309998.2A CN116698739A (en) | 2023-03-28 | 2023-03-28 | Large-load scratch device and method for coating adhesion test |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310309998.2A CN116698739A (en) | 2023-03-28 | 2023-03-28 | Large-load scratch device and method for coating adhesion test |
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| Publication Number | Publication Date |
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| CN116698739A true CN116698739A (en) | 2023-09-05 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310309998.2A Pending CN116698739A (en) | 2023-03-28 | 2023-03-28 | Large-load scratch device and method for coating adhesion test |
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- 2023-03-28 CN CN202310309998.2A patent/CN116698739A/en active Pending
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