A grating type indicator calibrator

Abstract

The utility model relates to the technical field of testing instrument, concretely is a grating type indicating instrument testing instrument, including host computer body, grating sensor system, fixture system, computer control system and precision drive mechanism. Fixture system links multiple clamping rings through rotary ring plate linkage, realizes the synchronous radial clamping to different shape indicating instrument. Including: install the clamping base plate on the workstation, the coaxial setting rotary base plate and rotary ring plate above it, the center of three forms the clamping passageway, rotary base plate is hinged through the swing axle multiple clamping rings, and each clamping ring is connected movable block through swing rod, and movable block is limited in the U type base of clamping base plate, and rotary ring plate is fixedly connected with rotary base plate through connecting rod no.

Description

Technical Field

[0001] This utility model relates to the field of calibration instrument technology, specifically a grating indicator calibration instrument. Background Technology

[0002] A grating-type indicator calibrator is a specialized instrument that uses a grating displacement sensor as a measurement reference to automatically and accurately calibrate and verify various pointer-type indicators (such as dial indicators, micrometer indicators, lever indicators, and internal diameter indicators) and digital indicators. Its main components are...

[0003] Main unit chassis: Provides a solid mechanical foundation.

[0004] High-precision grating sensor system: the core measurement unit that determines the accuracy of the instrument.

[0005] Precision drive mechanism: usually driven by stepper motor or servo motor, to realize the automatic and smooth movement of the worktable.

[0006] Clamping system: Used for quick and reliable clamping of various types of indicator gauges.

[0007] Computer control system: A built-in or external computer runs dedicated verification software to control the entire verification process.

[0008] Image recognition system (equipped in high-end models): Uses a high-resolution camera to automatically identify the pointer position and reading of the pointer meter, achieving fully automatic verification.

[0009] In particular, the clamping system needs to clamp different types of indicators during use, such as dial indicators, micrometer indicators, lever indicators, etc. Different indicators have different shapes and sizes, which means that the clamping system needs to be matched and fixed accordingly. This will greatly increase the complexity of the clamping system, especially in terms of operation steps, such as increasing the number of fastening bolts and positioning requirements, which will seriously reduce the positioning and disassembly speed of the indicators to a certain extent.

[0010] In response, this application presents a grating-type indicator calibration method. Utility Model Content

[0011] The purpose of this invention is to provide a grating-type indicator calibrator to solve the problems mentioned in the background art.

[0012] To achieve the above objectives, this utility model provides the following technical solution:

[0013] A grating indicator calibration instrument includes a main body, a grating sensor system, a fixture system, and a computer control system. The grating sensor system and the computer control system are both located inside the main body, and an operation panel for controlling the operation of the calibration instrument is provided on the top of the main body. At the same time, a precision drive mechanism is provided on one side of the main body, and a worktable is provided on the precision drive mechanism in a lifting manner. The fixture system is provided on the worktable for positioning and calibrating different types of indicators.

[0014] The precision drive mechanism includes a moving rail mounted on one side of the main body, a moving base slidably mounted on the top of the moving rail, and an electric telescopic rod connected to one side of the moving base for automatically driving the moving base to move along the upper side of the moving rail.

[0015] A mounting plate is installed on one side of the top center of the mobile base via a lifting device. An arc-shaped clamping base plate is fixedly installed on one side of the mounting plate. The clamping system is set on the clamping base plate and is positioned by manual rotation. It can stably position indicators of different shapes.

[0016] The clamping system includes a clamping base plate rotatably connected to a rotating base plate. A rotating ring plate is mounted on the top center of the rotating base plate via multiple annularly spaced connecting rods. The rotating ring plate, rotating base plate, and clamping base plate are coaxially distributed and have a through clamping channel in the center. The indicator to be positioned is placed in the clamping channel. Multiple clamping rings are annularly spaced between the rotating ring plate and the rotating base plate. The bottom of each clamping ring is rotatably connected to the upper side of the rotating base plate via a swing shaft. A movable block is connected to the outer wall of the clamping ring away from the center of the clamping channel via a swing rod. The movable block is restricted to movement within a U-shaped base on the clamping base plate. The opening at the top of the U-shaped base plate is narrower at both ends than in the middle. The movable block can move within a certain distance inside the U-shaped base plate. By rotating the rotating ring plate plate, the rotating base plate is controlled to rotate on the clamping base plate. Then, with the movable block placed in the U-shaped base plate, the clamping rings are controlled to move closer to or away from the center of the clamping channel plate, clamping and fixing the indicator inside from multiple directions.

[0017] One of the connecting rods is connected to a second connecting rod on its outer wall. The end of the second connecting rod is threaded with a vertical adjusting screw. The top of the adjusting screw is fitted with a handle, and the bottom is fitted with a sliding rod. The bottom of the sliding rod is fitted with a positioning block. The top of the clamping base plate corresponding to the positioning block is provided with an arc-shaped limiting groove. The arc-shaped limiting groove is consistent with the curvature of the rotating base plate. By pushing the second connecting rod, the rotating ring plate is rotated. Then, by rotating the handle, the positioning block is controlled to contact the inner wall of the arc-shaped limiting groove, thereby fixing the position of the rotated ring plate and achieving stable positioning of the indicator.

[0018] Compared with the prior art, the advantages of this utility model are: the synchronous radial adjustment of multiple clamping rings is achieved through the rotary linkage mechanism, which is compatible with irregularly shaped indicators such as dial indicators and micrometers, without the need to replace clamping components.

[0019] Multi-directional clamping can be achieved with a single push, and one-click locking can be achieved with the screw-type positioning mechanism, improving clamping efficiency.

[0020] The arc-shaped limiting groove and the non-smooth surface are used to eliminate displacement backlash, and the L-shaped slip ring and rotating ring groove design prevent longitudinal movement.

[0021] By distributing the clamping force evenly, deformation of the indicator is avoided, ensuring the reliability of the calibration data. Attached Figure Description

[0022] Figure 1 This is a three-dimensional structural diagram of a grating-type indicator calibrator.

[0023] Figure 2 for Figure 1 A magnified structural diagram of A in the diagram.

[0024] Figure 3 This is a schematic diagram of the bottom partial structure of the movable base in a grating-type indicator calibrator.

[0025] Figure 4 This is a schematic diagram of the bottom partial structure of the rotating ring plate in a grating-type indicator calibrator.

[0026] The components include: main body 10, moving track 11, moving base 12, slider 13, electric telescopic rod 14, operation panel 16, screw barrel 17, screw 18, mounting plate 19, clamping base plate 20, rotating base plate 21, rotating ring plate 22, connecting rod 1 23, U-shaped base 24, movable block 25, swing rod 26, clamping ring 27, swing shaft 28, arc-shaped limiting slide groove 29, sliding rod 30, positioning block 31, L-shaped slip ring 32, connecting rod 2 33, and adjusting screw 34. Detailed Implementation

[0027] It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0028] 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 orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of 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 implicitly specifying the number of indicated technical features. Thus, features defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0029] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect 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.

[0030] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0031] Please see Figures 1-4 A grating indicator calibration instrument includes a main body 10, a grating sensor system, a fixture system, and a computer control system. The grating sensor system and the computer control system are both located inside the main body 10. An operation panel 16 for controlling the operation of the calibration instrument is provided on the top of the main body 10. At the same time, a precision drive mechanism is provided on one side of the main body 10. A worktable is lifted and lowered on the precision drive mechanism. The fixture system is set on the worktable for positioning and calibration of different types of indicators.

[0032] The precision drive mechanism includes a moving track 11 installed on one side of the main body 10, a moving base 12 slidably disposed on the top of the moving track 11, and an electric telescopic rod 14 connected to one side of the moving base 12 for automatically driving the moving base 12 to move along the upper side of the moving track 11.

[0033] A mounting plate 19 is installed on one side of the top center of the mobile base 12 via a lifting component. An arc-shaped clamping base plate 20 is fixedly installed on one side of the mounting plate 19. The clamping system is set on the clamping base plate 20. The clamping system is positioned by manual rotation and clamping, which can stably position indicators of different shapes.

[0034] The clamping system includes a clamping base plate 20 with a rotating base plate 21 rotatably connected to its upper side. A rotating ring plate 22 is mounted on the top center of the rotating base plate 21 via multiple annularly spaced connecting rods 23. The rotating ring plate 22, the rotating base plate 21, and the clamping base plate 20 are coaxially distributed and have a through clamping channel in the center. The indicator to be positioned is placed in the clamping channel. Multiple clamping rings 27 are annularly spaced between the rotating ring plate 22 and the rotating base plate 21. The bottom of each clamping ring 27 is rotatably connected to the upper side of the rotating base plate 21 via a swing shaft 28. The clamping rings 27 are located away from the clamping base plate 21. A movable block 25 is connected to the outer wall of the channel center by a swing rod 26. The movable block 25 is restricted to move within a U-shaped base 24 on the clamping base plate 20. The opening at the top of the U-shaped base 24 is narrower at both ends than in the middle. The movable block 25 can move within a certain distance when placed inside the U-shaped base 24. The rotating base plate 21 is controlled to rotate on the clamping base plate 20 by rotating the rotating ring plate 22. Then, with the movable block 25 in the U-shaped base 24, the clamping ring 27 is controlled to move closer to or further away from the center of the clamping channel, clamping and fixing the indicator placed inside from multiple directions.

[0035] One of the connecting rods 23 is connected to a connecting rod 33 on its outer wall. A vertical adjusting screw 34 is threaded to the end of the connecting rod 33. A handle is installed at the top of the adjusting screw 34 and a sliding rod 30 is installed at the bottom. A positioning block 31 is installed at the bottom of the sliding rod 30. An arc-shaped limiting groove 29 is opened on the top of the clamping base plate 20 corresponding to the positioning block 31. The arc-shaped limiting groove 29 is consistent with the curvature of the rotating base plate 21. By pushing the connecting rod 23, the rotating ring plate 22 is rotated. Then, by rotating the handle, the positioning block 31 is controlled to contact the inner wall of the arc-shaped limiting groove 29, thereby fixing the position of the rotating ring plate 22 after rotation, thus achieving stable positioning of the indicator.

[0036] Specifically, the lifting component includes two screws 18 and a screw cylinder 17 threaded between the two screws 18. The ends of the screws 18 away from the screw cylinder 17 are connected to the bottom of the movable base 12 and the mounting plate 19. By rotating the screw cylinder 17, the depth of the two screws 18 inside the screw cylinder 17 is controlled, thereby adjusting the placement height of the mounting plate 19.

[0037] Specifically, sliders 13 are symmetrically installed on both sides of the bottom of the movable base 12. The inner wall of the movable base 12 corresponding to the sliders 13 is provided with a slide rail. The sliders 13 move along the slide rail to keep the movable base 12 sliding stably on the movable track 11.

[0038] In this embodiment of the invention, the bottom of the positioning block 31 and the inner wall of the arc-shaped limiting groove 29 are both provided with non-smooth surface structures to maintain sufficient stability when the two are in contact.

[0039] An L-shaped slip ring 32 is installed on the bottom edge of the rotating substrate 21. A rotating ring groove is provided in the inner wall of the clamping substrate 20 corresponding to the L-shaped slip ring 32. The L-shaped slip ring 32 is placed in the rotating ring groove and rotates to maintain the rotation between the rotating substrate 21 and the clamping substrate 20 and limit the longitudinal movement.

[0040] In one embodiment of the present invention, the workflow is as follows:

[0041] (1) Initialization and setup phase

[0042] Operators input verification parameters through the operation panel / software (human-machine interface), such as selecting the type of instrument to be tested (dial indicator / micrometer indicator), range, location of the verification point, and the verification procedure to be followed.

[0043] The computer control system (the brain) receives and stores these instructions.

[0044] (2) Clamping and preparation stage

[0045] The operator uses a clamping system to securely and correctly mount the indicator onto the calibrator. The clamping system is designed to ensure that the indicator's probe is parallel to the direction of movement of the calibrator's table, providing the mechanical basis for obtaining accurate data.

[0046] The computer control system is waiting for the "start verification" instruction.

[0047] (3) Verification stage

[0048] Step 1: The brain issues movement commands.

[0049] The computer control system sends a command to the drive motor based on preset calibration points: "Move 10.00 μm in the forward direction."

[0050] Step Two: Physical execution and visual monitoring

[0051] The drive motor begins to rotate precisely, moving the worktable and the moving part of the grating ruler together.

[0052] The grating sensor system monitors the actual displacement of the worktable in real time. It continuously sends pulse signals back to the computer: "Moved 1μm... 2μm... ... 10.00μm in place!"

[0053] The computer confirmed that the actual displacement had reached the target value.

[0054] Step 3: Brain data collection and recording

[0055] The computer control system immediately begins data acquisition the instant the displacement reaches the target point and stabilizes:

[0056] Acquire standard value: Read the current precise actual displacement value (e.g., 10.02 μm) from the grating sensor system.

[0057] Data collection method: (The method depends on the level of automation)

[0058] Fully automatic type: Reads the dial reading of the pointer meter (e.g., 10μm) via an image recognition camera, or reads the reading of the digital display meter directly via a cable.

[0059] Semi-automatic type: A prompt will pop up on the software interface, and the operator will have to visually read the dial value and then manually click to confirm.

[0060] The computer records this set of data (actual displacement value vs. indicated value).

[0061] Step 4: Looping and Reversing

[0062] The "brain" continues to issue instructions to move to the next checkpoint, repeating steps one through three until the measurement of the entire positive travel is completed.

[0063] When performing a retrace error check, the "brain" will issue a reverse movement command to repeat the above process.

[0064] (4) Data processing and result generation stage

[0065] After all the checks are completed, the computer control system calls the internal algorithm.

[0066] Based on the standard displacement value provided by the grating sensor system, calculate all indicators of the indicator, such as indication error, hysteresis error, and repeatability.

[0067] The calculated error is automatically compared with the maximum permissible error (MPE) specified in the national regulations.

[0068] Finally, the computer control system generates a complete calibration report and clearly displays the results (pass / fail, error curve, data table) to the operator through the operation panel / software. The report can also be printed or saved as an electronic record.

[0069] The working principle of this utility model is as follows:

[0070] Clamping stage: Place the indicator in the clamping channel at the center of the clamping substrate 20, the rotating substrate 21 and the rotating ring plate 22.

[0071] Pushing the connecting rod 23 drives the rotating ring plate 22 to rotate → The rotating base plate 21 rotates synchronously → The movable block 25 moves within the U-shaped base 24 → The swing rod 26 drives the clamping ring 27 to swing centripetally around the swing axis 28 → Multiple clamping rings 27 clamp synchronously to the indicator.

[0072] Locking stage: Rotate the handle at the top of the adjusting screw 34 → drive the sliding rod 30 to move down → press the positioning block 31 into the arc-shaped limiting groove 29 of the clamping base plate 20 → lock the position of the rotating ring plate 22 through the non-smooth surface structure.

[0073] Verification stage: The computer control system drives the electric telescopic rod 14 to move the base 12 along the moving track 11 → the grating sensor system collects the displacement data → the automatic / manual recording of the indicated values ​​→ the generation of the verification report.

[0074] It should be understood that in this application, all rotating, sliding, meshing, belt-driven and other moving parts are well lubricated and not prone to slippage or wear, and each part is provided with a corresponding protective shell. However, in the accompanying drawings of this application, the connection state of each moving part is not shown. It should also be understood that each part in this application is made of metal or plastic material with suitable strength in the relevant field to ensure that its structural rigidity meets the actual requirements.

[0075] The preferred embodiments of the present invention have been described in detail above. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present invention.

Claims

1. A grating indicator calibrator, comprising a main body (10), a grating sensor system, a fixture system, a computer control system, and a precision drive mechanism, wherein the precision drive mechanism includes a moving track (11), a moving base (12), and an electric telescopic rod (14), the moving base (12) being connected to a mounting plate (19) via a lifting component, characterized in that, The clamping system includes: Arc-shaped clamping base plate (20) fixed to mounting plate (19); A rotating substrate (21) and a rotating ring plate (22) are coaxially stacked on top of the clamping substrate (20), and a clamping channel is provided at the center of the three. Multiple clamping rings (27) are distributed in a ring on the outside of the clamping channel. Each clamping ring (27) is hinged to the upper surface of the rotating substrate (21) via a swing shaft (28). A U-shaped base (24) is provided on the clamping base plate (20), and a movable block (25) is movably connected inside it. The movable block (25) is hinged to the outer wall of the clamping ring (27) via a swing rod (26). Multiple connecting rods (23) connecting the rotating ring plate (22) and the rotating base plate (21); Connecting rod 2 (33) and locking mechanism for driving the rotating ring plate (22) to rotate.

2. The grating-type indicator calibrator according to claim 1, characterized in that, The lifting component includes two screws (18) and a screw cylinder (17) that is threadedly connected to the two. The two ends of the screws (18) are fixed to the bottom of the movable base (12) and the mounting plate (19), respectively.

3. The grating-type indicator calibrator according to claim 1, characterized in that, The clamping system also includes an adjusting screw (34) vertically threaded to the end of the connecting rod (33), a sliding rod (30) fixed to the bottom of the adjusting screw (34), and a positioning block (31) provided at the end of the sliding rod (30). The surface of the clamping base plate (20) is provided with an arc-shaped limiting groove (29) that cooperates with the positioning block (31).

4. The grating-type indicator calibrator according to claim 3, characterized in that, The bottom surface of the positioning block (31) and the inner wall of the arc-shaped limiting groove (29) are both provided with non-smooth surface structures to increase frictional resistance.

5. A grating-type indicator calibrator according to claim 4, characterized in that, The movable base (12) has sliders (13) on both sides of its bottom, and the movable track (11) has a slide that slides with the sliders (13).

6. A grating-type indicator calibrator according to claim 5, characterized in that, The bottom edge of the rotating substrate (21) is provided with an L-shaped slip ring (32), and the inner wall of the clamping substrate (20) is provided with a rotating ring groove for the L-shaped slip ring (32) to rotate.

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