A pull-off paint adhesion tester calibration structure

Abstract

The utility model relates to instrument measurement calibration technical field, concretely is a kind of drawing method paint film adhesion tester calibration structure. Aim at solving the problem of unstable spindle installation, cumbersome operation etc. in existing calibration method. Including base, mounting plate, force value sensor, test rod. Through driving motor and gear box transmission, make bidirectional screw rod synchronous reverse rotation, drive two clamping blocks symmetrical movement, accurate clamping tester mounting seat. Circular-arc clamping surface and guiding mechanism ensure installation centring, avoid eccentric load error. Electric push rod drives test rod to lift, simulates actual test process, and force value sensor real-time data acquisition and with tester display value comparison, complete calibration. The structure is easy to operate, significantly improve calibration efficiency and accuracy.

Description

Technical Field

[0001] This utility model relates to the field of instrument measurement and calibration technology, specifically a calibration structure for a pull-out method paint film adhesion tester. Background Technology

[0002] A paint film adhesion tester is a key device for measuring coating performance, and the accuracy of its measurements is crucial. For example... Figure 1 As shown, the testing part of the adhesive strength tester includes a cylindrical mounting base with a mounting hole inside. A testing rod is positioned within the mounting hole, and a quick connector is attached to the end of the testing rod, connecting it to a spindle. The lower end of the spindle is connected to the paint film to be tested. The testing rod is pulled upwards until the spindle separates from the paint film, at which point the adhesion strength is displayed on the tester. To ensure the consistency and reliability of test results from different instruments, it is necessary to periodically calibrate the instrument using a high-precision standard device. Existing calibration methods often use force sensors. During calibration, the lower end of the spindle is fixedly mounted on the force sensor. A load is applied to the spindle using the adhesive strength tester, and the calibration of the adhesive strength tester is completed by comparing the displayed values ​​of the adhesive strength tester and the force sensor.

[0003] However, in actual use, there are problems such as difficulty in installing and securing the tester spindle to the force sensor, which makes the spindle easy to fall off, and the installation process is cumbersome, and the results are incorrect due to inaccurate spindle alignment. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide a calibration structure for a pull-out method paint film adhesion tester, which makes it easier to calibrate the adhesion tester.

[0005] The technical solution adopted by this utility model to solve its technical problem is a calibration structure for a pull-out method paint film adhesion tester, including a base, a mounting plate mounted on the top of the base via a connecting column, a force sensor mounted on the upper surface of the base, the force sensor being electrically connected to a display, a test rod fixedly connected above the force sensor, a through hole on the upper surface of the mounting plate, the through hole being coaxially arranged with the test rod, a connector being provided at the top of the test rod, a threaded section being provided at the upper end of the connecting column, a connecting hole for the threaded section to pass through on the upper surface of the mounting plate, and adjusting nuts being provided on both sides of the connecting hole; a drive motor is mounted on the upper surface of the mounting plate, a gearbox is provided at the output end of the drive motor, and a drive bevel gear and a first gear are provided in the gearbox. Driven bevel gear and second driven bevel gear, the driving bevel gear and the output end of the drive motor are fixedly connected, the drive motor is provided with a first fixed seat and a second fixed seat on both sides, the first fixed seat is connected to the first driven bevel gear through a first threaded rod, the second fixed seat is connected to the second driven bevel gear through a second threaded rod, the first threaded rod and the second threaded rod have opposite thread directions, a first connecting block is threadedly connected to the first threaded rod, a second connecting block is threadedly connected to the second threaded rod, a first clamping block is provided on the first connecting block, a second clamping block is provided on the second connecting block opposite to the first clamping block, both the first clamping block and the second clamping block are provided with arc-shaped clamping surfaces, the center line of the connector is coplanar with the plane where the center lines of the two clamping surfaces are located.

[0006] Furthermore, a first guide mechanism is provided between the first clamping block and the mounting plate, and a second guide mechanism is provided between the second clamping block and the mounting plate.

[0007] Furthermore, the first guiding mechanism includes a first guiding groove disposed on the mounting plate, and the first clamping block is provided with a first guiding block that cooperates with the first guiding groove; the second guiding mechanism includes a second guiding groove disposed on the mounting plate, and the second clamping block is provided with a second guiding block that cooperates with the second guiding groove.

[0008] Furthermore, the first guiding mechanism includes a first fixing block disposed on the mounting plate, the second guiding mechanism includes a second fixing block disposed on the mounting plate, a light rod is disposed between the first fixing block and the second fixing block, and a movable block is disposed on the first clamping block and the second clamping block for use with the light rod.

[0009] Furthermore, the drive motor is a servo motor.

[0010] The beneficial effects of this utility model are: by using a bidirectional threaded rod and bevel gear transmission, the synchronous and symmetrical movement of the two clamping blocks is achieved. With the help of the arc clamping surface and the guide mechanism, the center of the mounting base is ensured to coincide with the axis of the test rod, avoiding measurement errors caused by off-center loading. The electric drive for clamping and lifting replaces the traditional manual installation method, significantly improving calibration efficiency and reducing operation difficulty. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the testing section of a paint film adhesion tester; Figure 2 This is a schematic diagram of the present invention; Figure 3 yes Figure 2 Top view; Figure 4 This is a schematic diagram of another embodiment of the first guide mechanism and the second guide mechanism; Figure 5 This is a schematic diagram of a gearbox.

[0012] Reference numerals: 1-Base; 2-Connecting column; 3-Mounting plate; 4-Force sensor; 5-Display power supply; 6-Test rod; 7-Through hole; 8-Connector; 9-Threaded section; 10-Drive motor; 11-Gearbox; 12-Driving bevel gear; 13-First driven bevel gear; 14-Second driven bevel gear; 15-First fixed seat; 16-Second fixed seat; 17-First threaded rod; 18-Second threaded rod; 19-First connecting block; 20-Second connecting block; 21-First clamping block; 22-Second clamping block; 23-First guide mechanism; 24-Second guide mechanism; 25-First fixed block; 26-Second fixed block; 27-Smooth rod; 28-Moving block; 29-Adjusting nut. Detailed Implementation

[0013] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0014] like Figures 2 to 5As shown, this utility model provides a calibration structure for a pull-out adhesion tester, comprising a base 1. A mounting plate 3 is mounted on top of the base 1 via connecting columns 2. Four connecting columns 2 are located at the four corners of the base 1, connecting the base 1 and the mounting plate 3 to form a rigid frame for the entire device, determining and maintaining a specific height and relative position between the mounting plate 3 and the base 1. A force sensor 4 is mounted on the upper surface of the base 1, electrically connected to a display 5 for real-time display of force data. A test rod 6 is fixedly connected above the force sensor 4, using bolts or screws. A through hole 7 is formed on the upper surface of the mounting plate 3, with a diameter larger than the maximum diameter of the connector 8. The through hole 7 is coaxially arranged with the test rod 6 to ensure consistent force direction.

[0015] The test rod 6 has a connector 8 at its top, which simulates the spindle in the paint adhesion tester. The upper end of the connecting post 2 has a threaded section 9, and the upper surface of the mounting plate 3 has a connecting hole for the threaded section 9 to pass through. Adjusting nuts 29 are provided on both sides of the connecting hole. By rotating the adjusting nuts 29 on both sides of the connecting hole, the mounting plate 3 can be moved up and down. After the mounting base of the paint adhesion tester is positioned, the position of the mounting plate 3 is adjusted to connect the connector 8 with the quick connector.

[0016] A drive motor 10 is also provided on the upper surface of the mounting plate 3. The drive motor 10 is preferably a servo motor capable of forward and reverse rotation. The output end of the drive motor 10 is connected to a gearbox 11. The gearbox 11 contains a driving bevel gear 12, a first driven bevel gear 13, and a second driven bevel gear 14. The driving bevel gear 12 is fixedly connected to the output end of the drive motor 10. A first fixed seat 15 and a second fixed seat 16 are respectively provided on both sides of the drive motor 10. The first fixed seat 15 is connected to the first driven bevel gear 13 via a first threaded rod 17, and the second fixed seat 16 is connected to the second driven bevel gear 14 via a second threaded rod 18. The threads of the first threaded rod 17 and the second threaded rod 18 have opposite directions. It should be noted that the first threaded rod 17 is rotatably connected to the first fixed seat 15 and the gearbox 11 via a bearing; similarly, the second threaded rod 18 is rotatably connected to the second fixed seat 16 and the gearbox 11 via a bearing.

[0017] A first connecting block 19 is threaded onto the first threaded rod 17, and a second connecting block 20 is threaded onto the second threaded rod 18. A first clamping block 21 is provided on the first connecting block 19, and a second clamping block 22, opposite to the first clamping block 21, is provided on the second connecting block 20. Both clamping blocks have arc-shaped clamping surfaces for clamping the test instrument mounting base to be calibrated. The centerline of the connector 8 is coplanar with the plane containing the centerlines of the two clamping surfaces, ensuring aligned force distribution.

[0018] To further improve clamping stability, see Figure 3 A first guide mechanism 23 is provided between the first clamping block 21 and the mounting plate 3, and a second guide mechanism 24 is provided between the second clamping block 22 and the mounting plate 3. The first guide mechanism 23 includes a first guide groove provided on the mounting plate 3 and a first guide block provided on the first clamping block 21; the second guide mechanism 24 includes a second guide groove provided on the mounting plate 3 and a second guide block provided on the second clamping block 22. The guide mechanisms can effectively limit the horizontal displacement of the clamping blocks and ensure the centering accuracy during clamping.

[0019] Another embodiment of the first guide mechanism 23 and the second guide mechanism 24, see [link to embodiment]. Figure 4 The first guiding mechanism 23 includes a first fixing block 25 disposed on the mounting plate 3, and the second guiding mechanism 24 includes a second fixing block 26 disposed on the mounting plate. A guide rod 27 is disposed between the first fixing block 25 and the second fixing block 26. Movable blocks 28 that cooperate with the guide rod 27 are disposed on the first clamping block 21 and the second clamping block 22. The guide rod 27 is parallel to both the first threaded rod 17 and the second threaded rod 18. When the first clamping block 21 and the second clamping block 22 move, the movable blocks 28 move synchronously.

[0020] The working process of this utility model is as follows: Place the mounting base of the paint film adhesion tester to be calibrated between the first clamping block 21 and the second clamping block 22; Start the drive motor 10, which drives the first threaded rod 17 and the second threaded rod 18 to rotate synchronously in opposite directions through the gearbox 11, so that the two clamping blocks move towards each other and clamp the mounting base. By rotating the adjusting nuts 29 on both sides of the connecting hole, the mounting plate 3 is moved downward, and the connector 8 is connected to the quick connector at the end of the test rod. Then, the pull-out force tester is started to apply pressure to the connector. The actual force value is collected by force sensor 4 and compared with the value displayed by the tester to complete the calibration.

[0021] The embodiments described herein are preferred embodiments of this utility model and are not intended to limit the scope of protection of this utility model. Therefore, all equivalent changes made to the structure, shape, and principle of this utility model should be included within the scope of protection of this utility model.

Claims

1. A calibration structure for a pull-out adhesion tester, comprising a base (1), wherein a mounting plate (3) is provided above the base (1) via a connecting column (2), characterized in that: A force sensor (4) is provided on the upper surface of the base (1). The force sensor (4) is electrically connected to the display (5). A test rod (6) is fixedly connected above the force sensor (4). A through hole (7) is provided on the upper surface of the mounting plate (3). The through hole (7) is coaxially arranged with the test rod (6). A connector (8) is provided on the top of the test rod (6). A threaded section (9) is provided at the upper end of the connecting column (2). A connecting hole for the threaded section (9) to pass through is provided on the upper surface of the mounting plate (3). Adjusting nuts (29) are provided on both sides of the connecting hole. A drive motor (10) is provided on the upper surface of the mounting plate (3). A gearbox (11) is provided at the output end of the drive motor (10). An active bevel gear (12), a first driven bevel gear (13), and a second driven bevel gear (14) are provided inside the gearbox (11). The active bevel gear (12) and the output end of the drive motor (10) are fixedly connected. The drive motor (10) is fixedly connected with a first fixed seat (15) and a second fixed seat (16) on both sides. The first fixed seat (15) is connected to the first driven bevel gear (13) through a first threaded rod (17), and the second fixed seat (16) is connected to the second driven bevel gear (14) through a second threaded rod (18). The threads of the first threaded rod (17) and the second threaded rod (18) are opposite in direction. A first connecting block (19) is threaded on the first threaded rod (17), and a second connecting block (20) is threaded on the second threaded rod (18). A first clamping block (21) is provided on the first connecting block (19), and a second clamping block (22) is provided on the second connecting block (20) opposite to the first clamping block (21). Both the first clamping block (21) and the second clamping block (22) are provided with arc-shaped clamping surfaces. The center line of the connector (8) is coplanar with the plane containing the center lines of the two clamping surfaces.

2. The calibration structure for a pull-out adhesion tester as described in claim 1, characterized in that: A first guide mechanism (23) is provided between the first clamping block (21) and the mounting plate (3), and a second guide mechanism (24) is provided between the second clamping block (22) and the mounting plate (3).

3. The calibration structure for a pull-out adhesion tester for paint films as described in claim 2, characterized in that: The first guide mechanism (23) includes a first guide groove disposed on the mounting plate (3), and the first clamping block (21) is provided with a first guide block that cooperates with the first guide groove; the second guide mechanism (24) includes a second guide groove disposed on the mounting plate (3), and the second clamping block (22) is provided with a second guide block that cooperates with the second guide groove.

4. The calibration structure for a pull-out adhesion tester for paint films as described in claim 2, characterized in that: The first guide mechanism (23) includes a first fixing block (25) disposed on the mounting plate (3), the second guide mechanism (24) includes a second fixing block (26) disposed on the mounting plate (3), a light rod (27) is disposed between the first fixing block (25) and the second fixing block (26), and a moving block (28) is disposed on the first clamping block (21) and the second clamping block (22) for use with the light rod (27).

5. The calibration structure for a pull-out adhesion tester for paint films as described in claim 1, characterized in that: The drive motor (10) is a servo motor.

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