A thickness detection device

Abstract

The utility model discloses a thickness detection device belongs to the technical field of thickness detection device, test frame is installed and is provided with the micrometer along the vertical direction on test frame, and the test needle of micrometer is perpendicular with the test plane on test frame, the bottom of test needle is provided with average device, and the bottom of average device is provided with a plurality of test points, the utility model discloses when using, then lifts test needle, and places the plate -shaped test piece on the test plane, for example copper foil and bakelite board etc, then releases test needle, makes every test point of average device all fall on test piece, and every test point contacts the test piece thickness all different, but the bottom of test needle is always at every h sum average value place, therefore the reading of micrometer at this time represents every test point place test piece thickness sum average value, then carries out the test to the multiple of test piece, and the value that obtains takes average value again, can obtain the thickness of test piece, effectively improved test precision.

Description

Technical Field

[0001] This utility model relates to a detection device, and more particularly to a thickness detection device. Background Technology

[0002] Thickness gauges use devices to measure thickness, with the main component being a dial indicator. By placing a test piece on the test surface, the dial indicator's probe falls on the test piece, and the reading is the thickness of the test piece. Measurement is convenient. In actual use, the thickness of a test piece is often measured at multiple points rather than at a single point, and the average value is taken.

[0003] A search revealed patent number 202120233090.4, which discloses a portable thickness detection device for corrugated cardboard production, relating to the field of corrugated cardboard production technology. This portable thickness detection device includes a base with a vertical plate on it. A lower pad is fixedly mounted on the top of the base. A handle is fixedly mounted on the side of the vertical plate away from the base. A housing is fixedly mounted on the side of the vertical plate away from the handle. A rotating rod is rotatably mounted on the inner walls of the front and rear sides of the housing. One end of the rotating rod extends to the front of the housing and is fixedly mounted with a pointer located inside a glass cover. Scale lines are engraved on the front of the housing. A disc is fixedly fitted onto the rotating rod, and a first gear is fixed on the disc. A pressing rod is provided on the housing, longitudinally penetrating the housing and slidingly engaging with it. This invention has a simple structure, is easy to operate, and is highly portable, making it suitable for use.

[0004] The above method obtains the thickness of the measurement point by moving the pressure plate downward to contact the test piece and then reading the value of the pointer pointing to the scale line. However, when the pressure plate is used for measurement, the large contact area and the large area of ​​the upper surface of the test piece it covers can easily lead to inaccurate measurement data. Utility Model Content

[0005] The purpose of this invention is to provide a thickness detection device that has the advantage of accurate measurement values ​​and effectively solves the problem of large measurement errors caused by large measurement areas in the prior art.

[0006] The present invention adopts the following technical solution: a thickness detection device, including a test frame, on which a dial indicator is installed vertically, the test probe of the dial indicator being perpendicular to the test plane on the test frame; an averaging device is provided at the bottom of the test probe, and several test points are provided at the bottom of the averaging device, the distance between the several test points and the virtual horizontal plane being h, and the bottom of the test probe is always at the average value of the sum of each h.

[0007] Furthermore, the averaging device includes a primary balance block hinged to the test probe, with test points located at both ends of the primary balance block.

[0008] Furthermore, each end of the primary balance block is hinged with a secondary balance block; the test points at both ends of the primary balance block are respectively set at the ends of the corresponding secondary balance blocks.

[0009] Furthermore, the primary and secondary balance blocks are arranged vertically.

[0010] Furthermore, the hinge axis between the primary balance block and the test probe is located at the midpoint of the length direction of the primary balance block.

[0011] Furthermore, the hinge axis between the secondary balance block and the primary balance block is located at the midpoint of the length direction of the secondary balance block.

[0012] Furthermore, the intersection of the lines connecting the geometric centers of the test points at each diagonal is the average of the sum of the height values ​​of each test point.

[0013] Furthermore, the test fixture includes a workbench, the upper surface of which is a horizontal plane, i.e., a test plane.

[0014] Furthermore, a grip arm is fixedly provided on the side of the workbench, and a mounting bracket is fixedly provided on the top of the grip arm. The dial indicator is mounted on the mounting bracket, and the test probe is perpendicular to the test plane.

[0015] Furthermore, the upper end face of the mounting bracket is hinged with a lever, and a fork is provided at the end of the lever near the test probe. A stop is fixedly provided at the top of the test probe, and the test probe located above the dial indicator is located inside the fork.

[0016] I. This utility model, through the setting of a dial indicator, a test probe, a test frame, test points, and an averaging device, is used as follows: First, the dial indicator is zeroed, so that the test probe extends downwards, causing the averaging device and test points to fall on the test plane. At this time, the dial of the dial indicator is rotated so that the dial indicator pointer points to zero. Then, the test probe is raised, and a plate-shaped test piece, such as a copper foil sheet or a bakelite board, is placed on the test plane. Then, the test probe is released so that each test point of the averaging device falls on the test piece. The thickness of the test piece contacted by each test point is different, but the bottom of the test probe is always at the average of the sum of each h. Therefore, the dial indicator reading at this time represents the average of the sum of the thicknesses of the test piece at each test point. Then, multiple tests are performed on the test piece, and the values ​​obtained are averaged again to obtain the thickness of the test piece, effectively improving the testing accuracy.

[0017] II. This utility model, by setting a primary balance block and a secondary balance block, places the test piece between the test point and the test plane during use, so that each test point falls on the upper surface of the test piece. At this time, the primary balance block falls at the average value of the vertical drop of the secondary balance block in the length direction, and the bottom of the test probe falls at the average value of the vertical drop of the primary balance block in the length direction. The primary and secondary balance blocks make the bottom of the test probe fall at the average height of each test point. Therefore, the reading of the dial indicator represents the average value of the sum of the thicknesses of the test piece at each test point. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall three-dimensional structure of this utility model;

[0019] Figure 2 This is a three-dimensional structural diagram of the dial indicator in this utility model;

[0020] Figure 3 This is a three-dimensional structural diagram of the primary and secondary balance blocks in this utility model;

[0021] Figure 4 This is a three-dimensional structural diagram of the test point in this utility model.

[0022] In the diagram, 1. Dial indicator; 2. Test probe; 3. Test plane; 4. Test point; 5. Dial; 6. Pointer; 7. Primary balance weight; 8. Secondary balance weight; 9. Worktable; 10. Handle; 11. Mounting bracket; 12. Lever; 13. Shift fork; 14. Stop; 15. Hinge shaft. Detailed Implementation

[0023] Please see Figure 1-4 The present invention will now be described in detail with reference to the accompanying drawings and embodiments:

[0024] The thickness detection device of this utility model includes a test frame, on which a dial indicator 1 is vertically mounted. The test needle 2 of the dial indicator 1 is perpendicular to the test plane 3 on the test frame. An averaging device is provided at the bottom of the test needle 2, and several test points 4 are provided at the bottom of the averaging device. The distance between the several test points 4 and the virtual horizontal plane is h. The bottom of the test needle 2 is always at the average of the sum of each h. In use, the dial indicator 1 is first zeroed so that the test needle 2 extends downward and drives the averaging device and the test points 4 to fall on the test plane 3. At this time, the dial of the dial indicator 1 is rotated. 5. Make the pointer 6 of dial indicator 1 point to zero, then raise the test probe 2 and place a plate-shaped test piece, such as a copper foil sheet or bakelite board, on the test plane 3; then release the test probe 2 so that each test point 4 of the averaging device falls on the test piece; the thickness of the test piece contacted by each test point 4 is different, but the bottom of the test probe 2 is always at the average of the sum of each h, so the reading of dial indicator 1 at this time represents the average of the sum of the thickness of the test piece at each test point 4; then test multiple points on the test piece, and take the average of the values ​​again to obtain the thickness of the test piece.

[0025] This testing method improves the accuracy of the test. Conventional testing involves performing multi-point tests on the test piece and then averaging the results. While the technical solution in this application also involves multi-point testing and averaging, it measures the average of the area enclosed by multiple test points (4) before performing multi-point testing and averaging. This results in higher accuracy than conventional methods, even though the testing steps are the same. The advantage of this technical solution lies in its ability to improve the accuracy of measurements at each location, and the more precise value obtained by averaging measurements from multiple locations.

[0026] In this embodiment, the averaging device includes a primary balance block 7 hinged to the test probe 2, and test points 4 are set at both ends of the primary balance block 7. In use, a test piece is placed between the test point 4 and the test plane 3. At this time, the primary balance block 7 tilts because the test points 4 at both ends are in contact with different thicknesses of the test pieces. This causes the bottom end of the test probe 2 to fall at the average value of the thickness difference between the two ends, so that the reading of the dial indicator 1 represents the average value of the thickness of the test pieces at multiple test points 4.

[0027] In this embodiment, two secondary balance blocks 8 are hinged to both ends of the primary balance block 7; test points 4 at both ends of the primary balance block 7 are respectively set at the two ends of the corresponding secondary balance blocks 8; in use, the test piece is placed between the test point 4 and the test plane 3, so that each test point 4 falls on the upper surface of the test piece. At this time, the primary balance block 7 falls at the average value of the drop of the secondary balance block 8 in the length direction, and the bottom end of the test needle 2 falls at the average value of the drop of the primary balance block 7 in the length direction. The primary balance block 7 and the secondary balance block 8 make the bottom end of the test needle 2 fall at the average value of the height of each test point 4. Therefore, the reading of the dial indicator 1 represents the average value of the sum of the thicknesses of the test piece at each test point 4.

[0028] In this embodiment, the primary balance block 7 and the secondary balance block 8 are arranged vertically.

[0029] In this embodiment, the hinge axis 15 of the primary balance block 7 and the test needle 2 is located at the midpoint of the length direction of the primary balance block 7.

[0030] In this embodiment, the hinge axis 15 of the secondary balance block 8 and the primary balance block 7 is located at the midpoint of the length direction of the secondary balance block 8.

[0031] In this embodiment, the intersection of the lines connecting the geometric centers of the test points 4 at each diagonal is the average of the sum of the height values ​​of each test point 4.

[0032] In this embodiment, the test fixture includes a workbench 9, the upper surface of which is a horizontal plane, i.e., the test plane 3.

[0033] In this embodiment, a grip arm 10 is fixedly provided on the side of the workbench 9, and a mounting bracket 11 is fixedly provided on the top of the grip arm 10. The dial indicator 1 is mounted on the mounting bracket 11, and the test probe 2 is perpendicular to the test plane 3.

[0034] In this embodiment, a lever 12 is hinged to the upper end of the mounting bracket 11. A fork 13 is provided at one end of the lever 12 near the test needle 2. A stop 14 is fixedly provided at the top of the test needle 2. The test needle 2, located above the dial 5 of the dial indicator 1, is located inside the fork 13. In use, by pressing the lever 12, the lever 12 drives the fork 13 to move upward, which in turn causes the fork 13 to drive the test needle 2 to move upward through the stop 14, thereby achieving the purpose of manually driving the test needle 2 to move upward.

[0035] The working principle of this utility model is as follows: First, the dial indicator 1 is zeroed, causing the test probe 2 to extend downwards, driving the primary balance block 7 and the secondary balance block 8 downwards, so that the test point 4 falls on the test plane 3. At this time, the dial 5 of the dial indicator 1 is rotated so that the pointer 6 of the dial indicator 1 points to zero. Then, the test probe 2 is lifted by pressing the lever 12, placing the plate-shaped test piece on the test plane 3. The test probe 2 is then released, so that each test point 4 falls on the test piece. The thickness of the test piece contacted by each test point 4 is different. At this time, the primary balance block 7 falls at the average value of the vertical drop of the secondary balance block 8 along its length, and the bottom of the test probe 2 falls at the average value of the vertical drop of the primary balance block 7 along its length. Finally, the primary balance block 7 and the secondary balance block 8 cause the bottom of the test probe 2 to fall at the average height of each test point 4. Therefore, the reading of the dial indicator 1 represents the average value of the sum of the thicknesses of the test piece at each test point 4. Then, by testing multiple locations on the test piece and taking the average value, the thickness of the test piece can be measured.

Claims

1. A thickness detection device, characterized in that: The test includes a test frame, on which a dial indicator (1) is installed vertically. The test needle (2) of the dial indicator (1) is perpendicular to the test plane (3) on the test frame. An averaging device is provided at the bottom of the test needle (2). Several test points (4) are provided at the bottom of the averaging device. The distance between the several test points (4) and the virtual horizontal plane is h. The bottom of the test needle (2) is always at the average value of the sum of each h.

2. The thickness detection device according to claim 1, characterized in that: The averaging device includes a primary balance block (7) hinged to the test needle (2), and test points (4) are set at both ends of the primary balance block (7).

3. The thickness detection device according to claim 2, characterized in that: The first-level balance block (7) is hinged to two secondary balance blocks (8) at both ends; the test points (4) at both ends of the first-level balance block (7) are respectively set at the two ends of the corresponding secondary balance blocks (8).

4. The thickness detection device according to claim 3, characterized in that: The primary balancing block (7) and the secondary balancing block (8) are arranged vertically.

5. The thickness detection device according to claim 2, characterized in that: The hinge axis (15) of the primary balance block (7) and the test needle (2) is located at the midpoint of the length direction of the primary balance block (7).

6. The thickness detection device according to claim 3, characterized in that: The hinge axis (15) of the secondary balance block (8) and the primary balance block (7) is located at the midpoint of the length direction of the secondary balance block (8).

7. The thickness detection device according to claim 2, characterized in that: The intersection of the lines connecting the geometric centers of the test points (4) at each diagonal is the average of the sum of the height values ​​of each test point (4).

8. The thickness detection device according to claim 1, characterized in that: The test fixture includes a workbench (9), the upper surface of which is a horizontal plane, i.e., the test plane (3).

9. The thickness detection device according to claim 8, characterized in that: The workbench (9) is fixedly provided with a grip arm (10) on its side, and a mounting bracket (11) is fixedly provided at the top of the grip arm (10). The dial indicator (1) is mounted on the mounting bracket (11) and the test probe (2) is perpendicular to the test plane (3).

10. The thickness detection device according to claim 9, characterized in that: The upper end of the mounting bracket (11) is hinged with a lever (12), and a fork (13) is provided at the end of the lever (12) near the test needle (2). A stop block (14) is fixedly provided at the top of the test needle (2), and the test needle (2) located above the dial indicator (1) is located inside the fork (13).

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