Mechanical structure assembly based on non-contact optical feeler gauge calibrating device

Abstract

The utility model relates to a mechanical structure assembly based on a non-contact optical feeler gauge calibrating device. The mechanical structure assembly comprises a frame main body, a mounting bottom plate, a mobile platform, a clamp assembly, a mounting vertical plate and a confocal laser displacement sensor, the mounting bottom plate is of a plane structure and is mounted on the frame main body; a movable platform is mounted on the mounting bottom plate; one side of the middle part of the mounting vertical plate is fixedly connected with the mounting bottom plate, the other side of the middle part is provided with the lower measuring head, the upper part is fixedly connected with the upper measuring head, and the lower part is fixed on the bottom plate of the frame main body; the moving platform comprises an X-axis single-axis robot, a Y-axis single-axis robot and a positioning bottom plate, a Y-direction linear sliding rail and an X-direction linear sliding rail are installed on moving sliding blocks of the X-axis single-axis robot and the Y-axis single-axis robot respectively, and the Y-direction linear sliding rail and the X-direction linear sliding rail are fixedly connected with the positioning bottom plate; and a clamp assembly is fixed on the positioning bottom plate. According to the utility model, the differential measurement of the confocal laser displacement sensor is adopted to realize the non-contact measurement of the feeler gauge sheet, the precision is high, the pressing deformation cannot be caused, the cost is low, and the stroke is larger.

Description

Technical Field

[0001] This utility model belongs to the technical field of feeler gauge calibration, and specifically relates to a mechanical structure assembly based on a non-contact optical feeler gauge calibration device. Background Technology

[0002] Feeler gauges are physical measuring instruments with a fixed thickness, mainly used for gap detection. They are widely used in machining, automotive repair, and manufacturing industries. Their accuracy directly affects product quality improvement in these fields. In the field of metrology, the calibration cycle for feeler gauges is six months. According to existing technologies, JJG 62-2017 (Feeler Gauge Calibration Procedure) and GB / T 22523-2008 (Feeler Gauge Standard), the calibration of the thickness dimensional limit deviation and curvature of feeler gauges adopts contact measurement. The measurement method uses a micrometer, length gauge, or wall thickness micrometer as the main standard for direct contact measurement. Taking a length measuring instrument as an example, the measurement process first involves contacting the spherical measuring cap and the flat measuring cap of the length measuring instrument, and reading the value of the length measuring instrument as the relative zero point. Then, the measuring axis of the length measuring instrument is moved to separate the two measuring caps, and the feeler gauge is placed between the two measuring caps, so that the spherical measuring cap is in contact with the front of the feeler gauge and the flat measuring cap is in contact with the back of the feeler gauge. The difference between the reading at the specified measuring point and the relative zero point value is the thickness value at that point. For feeler gauges with a nominal value greater than 0.10 mm, a thickness measurement on the back side should also be added. During the measurement, the spherical measuring cap is in contact with the back of the feeler gauge and the flat measuring cap is in contact with the front of the feeler gauge. The length measuring instrument data is then read to calculate the thickness deviation and curvature of the feeler gauge.

[0003] Existing feeler gauge calibration technologies employ contact measurement, which has the following drawbacks: First, contact measurement requires manual rotation of the feeler gauge to bring it into contact with the contact head, and manual data processing is also required, resulting in slow measurement speed, inability to automate data processing, and high labor intensity for calibration personnel; Second, the force applied in contact measurement can cause indentation deformation, and the flatness of the measuring cap on the length measuring instrument and deviation of the measurement position all affect the measurement results and are significant sources of error; Third, contact measurement methods cannot achieve batch calibration of feeler gauges, resulting in low measurement efficiency.

[0004] Chinese invention patent CN 111895924 B discloses an automatic lens thickness measuring device. The device measures various small, round, aspherical lenses, which are transparent glass. The center thickness is measured using a laser coaxial displacement sensor, while the edge thickness is measured using a contact sensor. This technical solution is based on lens characteristics; for example, a circular lens uses an automatic centering clamp to locate the lens's center, and the suction cup transfer is based on the lens's adhesive properties. Therefore, this technical solution is not suitable for measuring thin, soft, easily deformable feeler gauges that have high standards for wrinkle measurement and require not only thickness deviation measurement but also curvature measurement. Furthermore, the host computer software compares the actual data with the measured data to obtain a scaling formula. Depending on the lens model (different curvatures), the host computer software selects different scaling formulas for data correction, which is also only applicable to lenses and not suitable for feeler gauge calibration. Utility Model Content

[0005] The technical problem to be solved by this utility model is to provide a mechanical structure assembly based on a non-contact optical feeler gauge calibration device that is highly accurate, easy and efficient to operate, automated, capable of batch testing, and low in cost.

[0006] This utility model is implemented as follows:

[0007] A mechanical structure assembly based on a non-contact optical feeler gauge calibration device includes:

[0008] The main frame, mounting base plate, moving platform, clamping assembly, mounting vertical plate, and confocal laser displacement sensor;

[0009] The mounting base plate has a planar structure and is mounted on the main frame body; the mobile platform is mounted on the mounting base plate.

[0010] The mounting base plate is fixedly connected to one side of the middle section of the mounting vertical plate, and the lower measuring head of the confocal laser displacement sensor is fixedly connected to the other side of the middle section through the lower measuring head adjustment unit. The upper measuring head of the confocal laser displacement sensor is fixedly connected to the upper part through the upper measuring head adjustment unit, and the lower part is fixed to the base plate of the frame body.

[0011] The mobile platform includes: an X-axis single-axis robot, a Y-axis single-axis robot, and a positioning base plate. The X-axis and Y-axis single-axis robots are precision slider-type electric cylinders, which can achieve arbitrary positioning within their x and y axis strokes under control signals, respectively, and are equipped with displacement sensors. A Y-direction linear slide rail and an X-direction linear slide rail are respectively mounted on the motion sliders of the X-axis and Y-axis single-axis robots. The positioning base plate is fixedly connected to the X-direction and Y-direction linear slide rails. The clamping assembly is fixed to the positioning base plate via a quick-release handle. The motion control of the mobile platform enables the clamping assembly to be positioned. The clamping assembly is equipped with a feeler gauge to be inspected.

[0012] Furthermore, the confocal laser displacement sensor is one of the following: CL-L030 laser coaxial displacement meter, IFS2406-10 spectral confocal sensor, or HPS-CFL030 spectral confocal displacement sensor.

[0013] The advantages of this utility model are:

[0014] The differential measurement using a confocal laser displacement sensor enables non-contact measurement of feeler gauges, which is highly accurate, does not cause indentation or deformation, and does not damage the feeler gauges; moreover, the moving platform used is low-cost and has a larger stroke. Attached Figure Description

[0015] The present invention will now be further described with reference to the accompanying drawings and embodiments.

[0016] Figure 1 This is a schematic diagram of the structure of this utility model.

[0017] Figure 2 yes Figure 1 The diagram shows the structure after removing the main frame and the positioning base plate.

[0018] Figure 3 This is a schematic diagram of the base plate structure in the clamp assembly of this utility model.

[0019] Figure 4 This is a schematic diagram of the fixture assembly of this utility model with the test feeler gauge piece installed (the test feeler gauge piece in the leftmost column of grooves is shown without the magnetic ring installed).

[0020] Figure label:

[0021] 1-Mounting base plate, 14-Quick handle, 2-Moving platform, 21-X-axis single-axis robot, 22-Y-axis single-axis robot, 23-Positioning base plate, 24-Y-direction linear slide rail, 25-X-direction linear slide rail, 31-First high-precision dual-axis level, 32-Second high-precision dual-axis level, 4-Clamping assembly, 41-Clamping base plate, 42-Inspected feeler gauge, 43-Magnetic ring, 44-Groove, 51-Upper measuring head, 52-Lower measuring head, 6-Mounting vertical plate, 7-L-shaped connecting rib, 81-Upper measuring head adjustment unit, 82-Lower measuring head adjustment unit, 91-Frame body. Detailed Implementation

[0022] The mechanical structure assembly of the non-contact optical feeler gauge calibration device in this embodiment is an improvement on the mechanical structure assembly of the non-contact optical feeler gauge calibration device proposed in application number 202411701720.0. The contents of the same parts are not described here.

[0023] In the non-contact optical feeler gauge calibration device proposed in application number 202411701720.0, the two-dimensional hollow moving platform is a mature existing technology and can be directly obtained from the market, such as the XY120120 two-dimensional hollow moving platform from Zoli Hanguang. However, the price of such commercially available two-dimensional hollow moving platforms is relatively expensive and their travel is limited. Therefore, this embodiment proposes a lower-cost alternative with unlimited travel. Its structure is described in detail below:

[0024] like Figures 1 to 4 As shown, a mechanical structure assembly based on a non-contact optical feeler gauge calibration device includes: a frame body 91, a mounting base plate 1, a moving platform 2, a clamp assembly 4, a mounting vertical plate 6, and a confocal laser displacement sensor.

[0025] The mounting base plate 1 is a planar structure, which is mounted on the frame body 91; the mobile platform 2 is mounted on the mounting base plate 1.

[0026] The mounting plate 6 is fixedly connected to the mounting base plate 1 on one side of the middle section via an L-shaped connecting rib 7. The lower measuring head 52 of the confocal laser displacement sensor is fixedly connected to the other side of the middle section via a lower measuring head adjustment unit 82. The upper measuring head 51 of the confocal laser displacement sensor is fixedly connected to the upper measuring head adjustment unit 81 at the top. The lower part is fixed to the base plate of the frame body 91 via an L-shaped connecting rib 7.

[0027] The mobile platform 2 includes an X-axis single-axis robot 21, a Y-axis single-axis robot 22, and a positioning base plate 25. The X-axis and Y-axis single-axis robots 21 and 22 are precision slider-type electric cylinders, capable of positioning at any position within their x and y axis strokes under control signals. Displacement sensors are embedded within them. A Y-direction linear slide rail 24 and an X-direction linear slide rail 25 are respectively mounted on the motion sliders of the X-axis and Y-axis single-axis robots 21 and 22. The positioning base plate 23 is fixedly connected to the X-direction linear slide rail 25 and the Y-direction linear slide rail 24. A clamp assembly 4 is fixedly mounted on the positioning base plate 23 via a quick-release handle 14. The motion control of the mobile platform 2 drives the clamp assembly 4 to position itself precisely at the measurement point in the measurement area of ​​the feeler gauge 42 being inspected. Two high-precision dual-axis levels, a first high-precision dual-axis level 31 and a second high-precision dual-axis level 32, are also fixedly mounted on the positioning base plate 23. These levels can monitor the levelness of the mobile platform 2 in real time, provide feedback to the lower-level computer, and correct the measurement results.

[0028] The fixture assembly 4 includes a fixture base plate 41 and a magnetic ring 43. The fixture base plate 41 is made of metal and has multiple specific grooves 44 arranged side by side to accommodate the feeler gauge piece 42 to be inspected and the magnetic ring 43. A through hole is also provided in the measuring area so that the laser from the upper measuring head 51 and lower measuring head 52 of the confocal laser displacement sensor can be directed onto the feeler gauge piece 42. The magnetic ring 43 is a magnetic circular structure that tightly presses the feeler gauge piece 42 into the grooves 44 of the fixture base plate 41. The inner ring area of ​​the magnetic ring 43 is the circular measuring area of ​​the feeler gauge. One fixture assembly 4 can accommodate the installation and batch calibration of multiple feeler gauge pieces. The use of a magnetic ring to press the feeler gauge piece firmly ensures that it does not deform or wrinkle, further guaranteeing measurement accuracy. There can be multiple clamping assemblies 4, so that while one feeler gauge clamping assembly 4 is measuring on this device, the other clamping assemblies 4 can be used to arrange the feeler gauges 42 to be inspected, so as to improve the inspection efficiency.

[0029] Confocal laser displacement sensors are a mature technology that can be readily available on the market, such as the CL-L030 laser coaxial displacement meter, the IFS2406-10 spectral confocal sensor, or the HPS-CFL030 spectral confocal displacement sensor.

[0030] This utility model discloses a feeler gauge calibration device based on non-contact optics. It utilizes the differential measurement principle of a confocal laser displacement sensor to achieve non-contact measurement of feeler gauges. At the same time, it employs a dedicated clamping assembly to prevent deformation and wrinkling of the feeler gauges caused by the clamps. Furthermore, it enables batch calibration of feeler gauges by arranging them in a flat manner. It features high precision, high intelligence, and high work efficiency, meeting the requirements for non-contact batch automatic calibration of feeler gauges. Moreover, the mobile platform used has low cost and a larger stroke.

[0031] It should be noted that this utility model is illustrated using a feeler gauge as an example. In practice, it can also be applied to the testing of other thin sheets such as high-precision copper sheets, high-precision aluminum sheets, lithium battery sheets, and thin rubber sheets. Simply adjust the groove 44 in the clamp assembly 4 to a shape that matches the thin sheet being tested.

[0032] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit the scope of protection of this utility model. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this utility model without departing from the essence and scope of the technical solutions of this utility model.

Claims

1. A mechanical structure assembly based on a non-contact optical feeler gauge calibration device, characterized in that: include: The main frame, mounting base plate, moving platform, clamping assembly, mounting vertical plate, and confocal laser displacement sensor; The mounting base plate has a planar structure and is mounted on the main frame body; the mobile platform is mounted on the mounting base plate. The mounting base plate is fixedly connected to one side of the middle section of the mounting vertical plate, and the lower measuring head of the confocal laser displacement sensor is fixedly connected to the other side of the middle section through the lower measuring head adjustment unit. The upper measuring head of the confocal laser displacement sensor is fixedly connected to the upper part through the upper measuring head adjustment unit, and the lower part is fixed to the base plate of the frame body. The mobile platform includes: an X-axis single-axis robot, a Y-axis single-axis robot, and a positioning base plate. The X-axis and Y-axis single-axis robots are precision slider-type electric cylinders, which can achieve arbitrary positioning within their x and y axis strokes under control signals, respectively, and are equipped with displacement sensors. A Y-direction linear slide rail and an X-direction linear slide rail are respectively mounted on the motion sliders of the X-axis and Y-axis single-axis robots. The positioning base plate is fixedly connected to the X-direction and Y-direction linear slide rails. The clamping assembly is fixed to the positioning base plate via a quick-release handle. The motion control of the mobile platform enables the clamping assembly to be positioned. The clamping assembly is equipped with a feeler gauge to be inspected.

2. The mechanical structure assembly of the non-contact optical feeler gauge calibration device as described in claim 1, characterized in that: The confocal laser displacement sensor is one of the following: CL-L030 laser coaxial displacement meter, IFS2406-10 spectral confocal sensor, or HPS-CFL030 spectral confocal displacement sensor.

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