CN219532881U - Large-load scratch device for coating adhesion test - Google Patents

Abstract

The utility model provides a high-load scratch device for testing coating adhesive force, which comprises the following specific 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 utility model 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

Large-load scratch device for coating adhesion test

Technical Field

The utility model relates to the field of electromechanical integrated precise instruments, in particular to a high-load scratch device 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 utility model aims to provide the large-load scratch device for the coating adhesive force test, solves the problems existing in the prior art, improves the detection accuracy, increases the load adjusting range, can simply and conveniently realize the scratch test of the coating material, and has 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 utility model 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.

The utility model has the beneficial effects that: the high-load scratch device for coating adhesion test provided by the utility model fundamentally avoids the phenomenon that the abrupt friction force is observed as a standard for judging the critical load which can be 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 utility model and are incorporated in and constitute a part of this specification, illustrate and explain the utility model and together with the description serve to explain the utility model.

FIG. 1 is a schematic view of the overall structure of a high load scoring device for coating adhesion testing of the present utility model;

FIG. 2 is a schematic diagram of a three-dimensional force signal detecting unit according to the present utility model;

fig. 3 is a schematic diagram of the structure of the acoustic signal detecting unit of the present utility model.

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 utility model 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 utility model 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 above description is only a preferred example of the present utility model and is not intended to limit the present utility model, but various modifications and variations can be made to the present utility model by those skilled in the art. Any modification, replacement, improvement, etc. of the present utility model should be included in the protection scope of the present utility model.

Claims (3)

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).