Measuring tool indicating value error calibrating device

Abstract

The utility model belongs to the technical field of measuring tool verification, and discloses a measuring tool indicating value error verification device which comprises a supporting plate, a supporting plate height adjusting mechanism, a supporting rod, a connecting part of the supporting rod and a base and the base, the supporting plate is provided with a height gauge verification position for providing a positioning hole for a height gauge, and the supporting plate is installed on the supporting plate height adjusting mechanism. The back of the supporting plate height adjusting mechanism is provided with a clamp structure matched with the supporting rod, and the supporting rod is fixedly connected with the base through the connecting portion of the supporting rod and the base. According to the utility model, the gauge blocks are stably supported in a free state, an operator does not need to hold the gauge blocks, the labor intensity is reduced, the gauge blocks are tightly matched, the operation frequency is reduced, and all operations can be completed by one person.

Description

Technical Field

[0001] This utility model belongs to the field of measuring tool calibration technology, and relates to a device for calibrating a general length measuring tool, specifically a measuring tool indication error calibration device. Background Technology

[0002] When verifying / calibrating the indication error of a height caliper, one hand must hold the gauge block while the other hand moves the caliper frame to bring the measuring face of the scribing jaws into contact with the measuring face of the gauge block. The height caliper base must also be held down. When the gauge block is placed vertically, it is easy to lose stability with one hand, causing it to tilt and creating an angle between the working surface of the gauge block and the flat surface, affecting measurement accuracy. Furthermore, temperature changes in the gauge block caused by holding it by hand will also affect the measurement results. The larger the measurement range, the more difficult it is to guarantee stable support and perpendicularity.

[0003] When verifying / calibrating depth calipers (and similarly depth micrometers and depth indicators), two sets of gauge blocks of the same size and height need to be placed parallel to each other on a flat plate, with the long side of the reference surface and the long side of the working surface of the gauge blocks in perpendicular contact. To ensure stable support, the sides of the gauge blocks must be perpendicular to both the flat plate and the reference surface of the depth calipers. The larger the measurement range, the more difficult it is to guarantee stable support and perpendicularity.

[0004] When verifying / calibrating various types of micrometers, the gauge block is held by the micrometer's anvil and measuring rod. The measuring force is applied to the measuring rod through the micrometer's force measuring device to verify / calibrate the micrometer's indication error and the parallelism of the two measuring surfaces. This requires a thorough fit between the micrometer's measuring surfaces and the gauge block. Unstable clamping of the gauge block or incomplete fit directly affects the accuracy of the micrometer's indication error.

[0005] Before this invention, height calipers, depth calipers, depth micrometers, depth indicators, and various types of micrometers lacked dedicated calibration devices for indication error. Typically, the working end of the required standard gauge block was placed on a platform, with the long side of the entire gauge block perpendicular to the platform. Because the gauge block was held by hand during calibration, it was prone to wobbling, causing the base surface to tilt. The larger the measuring range of the caliper, the larger the gauge block size required, and the more gauge blocks needed to be combined, leading to greater errors in stability and perpendicularity. For example, a height caliper with a measuring range of (0-1500) mm, with inspection points at (250, 501.5, 750, 1001.8, 1300, 1491.8) mm, typically uses a combination of 2-3 gauge blocks. Improper hand placement or loose meshing between gauge blocks will result in inaccurate measurement results. Furthermore, repeated measurements to determine data can easily cause economic losses to calibration equipment (due to impacts to gauge blocks and plate working surfaces), waste time and manpower, reduce work efficiency, and increase systematic errors. Existing calibration methods do not meet the calibration accuracy requirements. Utility Model Content

[0006] To address the aforementioned issues, this invention provides a measuring instrument indication error verification device. This device can clamp and place gauge blocks for all specifications of height calipers, depth calipers, depth micrometers, depth indicators, and various types of micrometers during indication error verification. It features a simple structure, convenient installation, strong versatility, high efficiency and reliability, and improves gauge block stability, thereby enhancing measurement efficiency.

[0007] The technical solution of this utility model is as follows:

[0008] A measuring instrument indication error verification device includes a support plate, a support plate height adjustment mechanism, a support rod, a support rod-base connection part, and a base. The support plate is provided with a height gauge verification position that provides a positioning hole for the height gauge. The support plate is installed on the support plate height adjustment mechanism. The support plate height adjustment mechanism has a clamp structure on its back that cooperates with the support rod. The support rod is fixedly connected to the base through the support rod-base connection part.

[0009] Furthermore, the support plate is provided with a vertical first gauge block positioning hole, a second gauge block positioning hole, a third gauge block positioning hole and a fourth gauge block positioning hole at the height gauge calibration position.

[0010] Furthermore, the first gauge block positioning hole, the second gauge block positioning hole, the third gauge block positioning hole, and the fourth gauge block positioning hole are respectively matched with the shape of the gauge block being marked.

[0011] Furthermore, a height gauge measuring rod hole is provided at the center of the height gauge calibration position.

[0012] Furthermore, the support plate is provided with a horizontally arranged dovetail groove, and a gauge block baffle is provided on the front side of the end of the dovetail groove.

[0013] Furthermore, the dovetail groove is matched with the pressure plate of the large-size micrometer.

[0014] Furthermore, the support plate height adjustment mechanism is inserted into the support rod through the connecting hole on the back of the support plate connecting plate, and the connecting hole is fixed by the first locking nut, the locking screw and the locking spring; the support plate is fixed on the support plate connecting plate.

[0015] The beneficial effects of this utility model are as follows:

[0016] 1. This utility model achieves stable support for gauge blocks in a free state, eliminating the need for the operator to hold the gauge blocks, reducing labor intensity, ensuring tight fit between gauge blocks, reducing the number of operations, and allowing a single person to complete all operations.

[0017] 2. Previously, when calibrating the indication errors of various specifications of height calipers and depth micrometers, there was no dedicated gauge block clamping device. Typically, the gauge block was simply placed on a platform, and the stable gauge block was held by hand to calibrate its indication error. Therefore, this invention relates to a gauge block clamping device for the combined gauge block clamping method used in calibrating the indication errors of height calipers and depth micrometers. This invention is applicable to the following measuring instruments: height calipers, depth calipers, depth indicators; various types of micrometers, including outside micrometers, common normal micrometers, depth micrometers, dial micrometers, and large-size outside micrometers.

[0018] 3. This calibration device has been designed and used internally by the applicant. Multiple durable positioning slots, evenly distributed, facilitate the placement of gauge blocks of different sizes into any slot, improving work efficiency and ensuring good stability. The device has low manufacturing cost and a simple manufacturing process, is easy to operate, and offers good stability. The measurement process is simple and easy to perform, reducing the labor intensity of employees. Attached Figure Description

[0019] To more clearly illustrate the technical solutions of the embodiments of this utility model patent, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model patent, and therefore should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained from these drawings without creative effort.

[0020] Figure 1 Top view of the structure of the measuring instrument indication error verification device of this utility model;

[0021] Figure 2 This is a side view of the present invention;

[0022] Figure 3 This is a schematic diagram of the support plate height adjustment mechanism of this utility model;

[0023] Figure 4 This is a schematic diagram of the base of this utility model;

[0024] Figure 5 This is a schematic diagram of an embodiment of the present utility model. Figure 1 ;

[0025] Figure 6 This is a schematic diagram of an embodiment of the present utility model. Figure 2 ;

[0026] Among them, 1—support plate, 2—support plate height adjustment mechanism, 3—support rod, 4—connection part between support rod and base, 5—base, 6—calibrated ruler, 7—first marking block, 8—second marking block, 9—slider part, 10 and 11 are both locking nuts, 12 and 13 are both screws, 14—pressure plate, 15—gauge block;

[0027] 1-1—Height gauge calibration position, 1-2—First gauge block positioning hole, 1-3—Second gauge block positioning hole, 1-4—Height gauge measuring rod hole, 1-5—Third gauge block positioning hole, 1-6—Fourth gauge block positioning hole, 1-7—Dovetail groove, 1-8—Gauge block baffle.

[0028] 2-1—Support plate connecting plate, 2-2—Connecting hole, 2-3—First locking nut, 2-4—Second locking nut, 2-5—Locking screw, 2-6—Locking spring, 2-7—Support rod slider;

[0029] 5-1, 5-2, and 5-3 are all plastic support pads; 5-4 is a groove; and 5-5, 5-6, 5-7, and 5-8 are all screw holes for connecting support rods. Detailed Implementation

[0030] This section describes embodiments of the present invention, used to explain and illustrate the technical solutions of the present invention. Unless otherwise specified, the embodiments and features described herein can be combined with each other.

[0031] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating directions or positional relationships, are for the purpose of facilitating and simplifying the description of this utility model, and do not indicate or imply that the device or device referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implying the number of indicated technical features. Thus, features defined with "first," "second," etc., may explicitly or implicitly include more than one of those features. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0032] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integrated connection; they can refer to a mechanical connection or a point connection; they can refer to a direct connection or a connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0033] Example 1:

[0034] A measuring tool indication error verification device includes a support plate 1, a support plate height adjustment mechanism 2, a support rod 3, a support rod-base connection part 4, and a base 5. The support plate 1 is provided with a height gauge verification position 1-1 that provides a positioning hole for the height gauge. The support plate 1 is installed on the support plate height adjustment mechanism 2. The support plate height adjustment mechanism 2 is provided with a clamp structure on its back to cooperate with the support rod 3. The support rod 3 is fixedly connected to the base 5 through the support rod-base connection part 4.

[0035] The support plate 1 has a vertical first gauge block positioning hole 1-2, a second gauge block positioning hole 1-3, a third gauge block positioning hole 1-5, and a fourth gauge block positioning hole 1-6 on the height gauge calibration position 1-1.

[0036] The first gauge block positioning hole 1-2, the second gauge block positioning hole 1-3, the third gauge block positioning hole 1-5, and the fourth gauge block positioning hole 1-6 are respectively matched with the shape of the gauge block being marked.

[0037] The height gauge calibration position 1-1 has a height gauge measuring rod hole 1-4 at its center.

[0038] The support plate 1 is provided with horizontally arranged dovetail grooves 1-7, and the front side of the end of the dovetail grooves 1-7 is provided with gauge block baffles 1-8.

[0039] Dovetail grooves 1-7 are matched with the pressure plates of large-size micrometers.

[0040] The support plate height adjustment mechanism 2 is inserted into the support rod 3 through the connecting hole 2-2 on the back of the support plate connecting plate 2-1. The connecting hole 2-2 is fixed by the first locking nut 2-3, the locking screw 2-5 and the locking spring 2-6; the support plate 1 is fixed on the support plate connecting plate 2-1.

[0041] Example 2:

[0042] A device for verifying the indication error of measuring instruments, such as Figure 1 As shown, its features include a support plate 1, a support plate height adjustment mechanism 2, a support rod 3, a connection part between the support rod and the base 4, and a base 5. The support plate 1 includes a height gauge calibration position 1-1, gauge block positioning holes 1-2, 1-3, 1-5, and 1-6, a height gauge measuring rod hole 1-4, a dovetail groove 1-7, and a gauge block baffle 1-8. The support plate height adjustment mechanism 2 includes a support plate connecting plate 2-1, a connecting hole 2-2, locking nuts 2-3 and 2-4, a locking screw 2-5, a locking spring 2-6, and a support rod slider 2-7. The base 5 includes plastic support pads 5-1, 5-2, and 5-3, a groove 5-4, and support rod connecting screw holes 5-5, 5-6, 5-7, and 5-8.

[0043] Insert the support plate height adjustment mechanism 2 into the support rod 3 through the connecting hole 2-2. Slide the support plate 1 up and down according to the size of the gauge block used during inspection. After the position is appropriate, rotate the locking nuts 2-3 and 2-4 to fix it.

[0044] Example 3:

[0045] The diagram shows a top view and a left view of the dedicated calibration device for measuring instrument indication error. Positioning holes 1-2, 1-3, 1-5, and 1-6 on the height gauge calibration position 1-1 are used to place the marked gauge blocks. The entire calibration device is placed on a Grade 0 flat plate, with the bottom of the standard gauge block contacting the Grade 0 plate. The scale portion of the gauge being calibrated is inserted into the height gauge measuring rod hole 1-4. The gauge block's positioning holes prevent wobbling and ensure calibration accuracy. The height of the support plate 1 is adjusted by the height adjustment mechanism 2, allowing for different calibration point heights. Locking nuts 2-3 and 2-4, locking screw 2-5, locking spring 2-6, and support rod slider 2-7 are used. The support plate 1 slides up and down according to the gauge block size used during calibration. Once the position is appropriate, the locking nuts 2-3 and 2-4 are rotated to secure it.

[0046] When verifying / calibrating large-size micrometers, one hand should hold the gauge block while the other hand rotates the measuring force device to lap the two measuring surfaces of the micrometer against the measuring surfaces of the gauge block. For micrometers with a measuring upper limit greater than 100mm, the gauge blocks should be lapped sequentially onto gauge blocks corresponding to the lower limit of the micrometer's measuring range for verification. Figure 2 , Figure 3 As shown, place the large-size gauge block or the lapped gauge block on the support plate 1, with one end of the gauge block resting on the gauge block baffle 1-8. Place the pressure plate in the dovetail groove 1-7 and press the pressure plate to position the gauge block. This allows for the verification of the indication error of the large-size micrometer.

[0047] The gauge block positioning holes 1-2, 1-3, 1-5, and 1-6 at the height gauge calibration position 1-1 are used to place the marking gauge block 7 and the standard gauge block 8. The entire set of special calibration devices is placed on a grade 0 plate. The bottom of the standard gauge block contacts the grade 0 plate. The scale part of the gauge 6 to be calibrated is inserted into the height gauge measuring rod hole 1-4. The gauge block is prevented from shaking through the positioning holes, ensuring calibration accuracy. The height of the support plate 1 is changed by raising and lowering the support plate height adjustment mechanism 2 to adapt to the height of different calibration points. Locking nuts 2-3 and 2-4, locking screw 2-5, locking spring 2-6, and support rod slider 2-7 are used. The support plate 1 is slid up and down according to the size of the gauge block used during calibration. After the position is appropriate, the locking nuts 2-3 and 2-4 are rotated to fix it. The height of each gauge block is adjusted one by one to meet the overall calibration requirements.

[0048] Place the large-size gauge block or the lapped gauge block on the support plate 1. One end of the gauge block 15 rests on the gauge block baffle 1-8. Place the slider part 9 of the pressure plate 14 into the dovetail groove 1-7. Supported by screws 12 and 13, tighten nuts 10 and 11 to press the pressure plate 14 onto the gauge block 15 for positioning. The anvil 7-1 of the micrometer 7 contacts both ends of the gauge block 15 to perform the large-size micrometer indication error verification.

Claims

1. A measuring instrument indication error verification device, characterized in that, It includes a support plate (1), a support plate height adjustment mechanism (2), a support rod (3), a support rod and base connection part (4), and a base (5). The support plate (1) is provided with a height gauge calibration position (1-1) that provides a positioning hole for the height gauge. The support plate (1) is installed on the support plate height adjustment mechanism (2). The support plate height adjustment mechanism (2) has a clamp structure on its back that cooperates with the support rod (3). The support rod (3) is fixedly connected to the base (5) through the support rod and base connection part (4).

2. The measuring instrument indication error verification device according to claim 1, characterized in that, The support plate (1) has a vertical first gauge block positioning hole (1-2), a second gauge block positioning hole (1-3), a third gauge block positioning hole (1-5), and a fourth gauge block positioning hole (1-6) on the height gauge calibration position (1-1).

3. The measuring instrument indication error verification device according to claim 2, characterized in that, The first gauge block positioning hole (1-2), the second gauge block positioning hole (1-3), the third gauge block positioning hole (1-5), and the fourth gauge block positioning hole (1-6) are respectively matched with the shape of the gauge block being marked.

4. The measuring instrument indication error verification device according to claim 3, characterized in that, The height gauge calibration position (1-1) has a height gauge measuring rod hole (1-4) at its center.

5. The measuring instrument indication error verification device according to claim 1, characterized in that, The support plate (1) is provided with a horizontally arranged dovetail groove (1-7), and a gauge block baffle (1-8) is provided on the front side of the end of the dovetail groove (1-7).

6. The measuring instrument indication error verification device according to claim 5, characterized in that, The dovetail groove (1-7) is matched with the pressure plate of the large-size micrometer.

7. The measuring instrument indication error verification device according to claim 1, characterized in that, The support plate height adjustment mechanism (2) is inserted into the support rod (3) through the connecting hole (2-2) on the back of the support plate connecting plate (2-1). The connecting hole (2-2) is fixed by the first locking nut (2-3), the locking screw (2-5) and the locking spring (2-6). The support plate (1) is fixed on the support plate connecting plate (2-1).

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