Vernier caliper automatic calibration auxiliary tool

Abstract

The invention discloses an auxiliary tool for automatic calibration of a vernier caliper. The auxiliary tool comprises a base (1), a fixing clamp (2), a guide rail (3), a movable clamping mechanism (4) and a gauge block fixing area (5). The fixed clamp (2) and the guide rail (3) are installed on the base (1), the movable clamping mechanism (4) is installed on the guide rail (3) and moves along the guide rail (3), the two ends of the vernier caliper are fixed to the fixed clamp (2), the gauge block fixing area (5) is arranged on one side of the base (1) and close to the movable clamping mechanism (4), and the movable clamping mechanism (4) operates a vernier part of the vernier caliper and a gauge block (6) of the gauge block fixing area (5). And executing an automatic verification operation process. According to the invention, through a mechanical auxiliary structure and the CCD module, the automatic operation of the calibration action of the caliper is replaced by the calibration personnel, the time of reading, operating and configuring the combined gauge block standard device by the personnel is reduced, and the working efficiency of the calibration of the caliper is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of vernier calipers and relates to an automatic verification auxiliary tooling for a vernier caliper. Background Art

[0002] Vernier caliper is a general-purpose measuring instrument and one of the most widely used and important measuring tools in the machinery industry. The vernier caliper is mainly composed of a main scale and a sliding vernier attached to the main scale. The main scale and the vernier are equipped with two pairs of movable jaws, which can be used to measure the inner diameter, length, outer diameter, etc. of parts. At present, the domestic caliper verification / calibration is based on the JJG30-2012 "Universal Caliper" verification procedure. The traditional vernier caliper verification is completed manually by the verification personnel, with the gauge block as the main standard. The verification personnel will manually combine the measuring points according to the specifications of the vernier caliper and the specifications to carry out the verification of the vernier caliper indication error. For example, for a (0-300) mm caliper, the measuring points are required to be 101.30 mm, 201.60 mm, and 291.90 mm, while for a (0-500) mm caliper, the measuring points are required to be 80 mm, 161.3 mm, 240 mm, 321.6 mm, 400 mm, and 491.90 mm. The selection and combination of gauge blocks need to be adjusted according to the specifications of the calipers of different specifications. The gauge blocks are combined and corrected to calculate the theoretical value, which is calculated with the value after the caliper measurement. The result is the indication error result. In addition, the subdivision error and indication variability are also verified by similar methods.

[0003] According to the regulations, the calibration operation of the vernier caliper is completed manually by the calibrator using the gauge block, and the reading is also realized by the calibrator visually. This manual calibration method relies more on the work experience of the calibrator. When the calibration quantity of the measuring tool increases, the calibrator needs to combine multiple sets of gauge blocks according to the specifications of the measuring tool for backup. When a large number of calipers of various types are sent for inspection, the frequency of taking and combining gauge blocks increases. The calibration has problems such as large workload and low efficiency, and is greatly affected by human errors. Summary of the invention

[0004] (I) Purpose of the invention

[0005] The purpose of the present invention is to provide a vernier caliper automatic calibration auxiliary tooling to assist calibration personnel in realizing automatic calibration of the vernier caliper indication error, subdivision error, and indication variability, thereby improving the automation level of the vernier caliper calibration work, improving the vernier caliper calibration efficiency, and reducing errors caused by human factors.

[0006] (II) Technical solution

[0007] In order to solve the above technical problems, the present invention provides a vernier caliper automatic calibration auxiliary tooling, which includes: a base 1, a fixed fixture 2, a guide rail 3, a movable clamping mechanism 4, and a gauge block fixing area 5; the fixed fixture 2 and the guide rail 3 are installed on the base 1, the movable clamping mechanism 4 is installed on the guide rail 3 and moves along the guide rail 3, the two ends of the vernier caliper are fixed on the fixed fixture 2, the gauge block fixing area 5 is arranged on one side of the base 1 and close to the movable clamping mechanism 4, the movable clamping mechanism 4 operates the vernier part of the vernier caliper and the gauge block 6 in the gauge block fixing area 5 to perform the automatic calibration operation process.

[0008] There are two fixing clamps 2, arranged front and back, one fixing clamp 2 is provided with two positioning clamps for fixing one end of the main scale jaw of the vernier caliper; the other fixing clamp is provided with a positioning clamp for fixing the other end of the vernier caliper.

[0009] The guide rail 3 has two tracks, which are arranged on both sides of the vernier caliper respectively.

[0010] The movable clamping mechanism 4 is installed on one of the two tracks.

[0011] Among them, the movable clamping mechanism 4 includes a movable bridge plate 7, an articulated arm 8, a CCD module 9, and a clamp 10; the movable bridge plate 7 cooperates with the track, one end of the articulated arm 8 is installed on the movable bridge plate 7, and the other end is provided with a clamp 10 and a CCD module 9, the clamp 10 operates the vernier part of the vernier caliper and the gauge block in the gauge block fixing area 5, and the CCD module 9 reads the reading of the vernier caliper.

[0012] The movable bridge plate 7 comprises two layers of plates pressed together, a track groove is arranged on the lower layer of the plate, the track groove matches with the track, and a joint arm 8 is installed on the upper layer of the plate.

[0013] The articulated arm 8 includes a plurality of branch joints, and adjacent joints are hingedly connected.

[0014] The clamp 10 is installed on the end surface of the other end of the articulated arm 8 .

[0015] The CCD module 9 is installed on the top side of the other end of the articulated arm 8 .

[0016] A pressure sensor 11 is disposed on each inner wall of the two clamping jaws of the clamp 10 .

[0017] (III) Beneficial effects

[0018] The automatic calibration auxiliary tooling for vernier calipers provided by the above technical solution, through mechanical auxiliary structures and CCD modules, replaces the calibration personnel in automating the caliper calibration action, reduces the time for personnel to read, operate, and configure combined gauge block standards, and improves the efficiency of caliper calibration work. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic structural diagram of the auxiliary tooling according to an embodiment of the present invention.

[0020] Figure 2 It is a schematic structural diagram of a movable clamping mechanism according to an embodiment of the present invention. DETAILED DESCRIPTION

[0021] In order to make the purpose, content and advantages of the present invention more clear, the specific implementation methods of the present invention are further described in detail below in conjunction with the drawings and examples.

[0022] Reference Figure 1 As shown, the automatic calibration auxiliary tooling of the vernier caliper in this embodiment includes: a base 1, a fixed fixture 2, a guide rail 3, a movable clamping mechanism 4, and a gauge block fixing area 5; the fixed fixture 2 and the guide rail 3 are installed on the base 1, the movable clamping mechanism 4 is installed on the guide rail 3 and moves along the guide rail 3, the two ends of the vernier caliper are fixed on the fixed fixture 2, the gauge block fixing area 5 is arranged on one side of the base 1 and close to the movable clamping mechanism 4, the movable clamping mechanism 4 operates the vernier part of the vernier caliper and the gauge block 6 in the gauge block fixing area 5 to perform the automatic calibration operation process.

[0023] There are two fixing clamps 2, arranged front and back, one fixing clamp 2 is provided with two positioning clamps for fixing one end of the main scale jaw of the vernier caliper; the other fixing clamp is provided with a positioning clamp for fixing the other end of the vernier caliper.

[0024] The guide rail 3 has two tracks, which are arranged on both sides of the vernier caliper respectively.

[0025] The movable clamping mechanism 4 is mounted on one of the two tracks.

[0026] like Figure 2 As shown, the movable clamping mechanism 4 includes a movable bridge plate 7, an articulated arm 8, a CCD module 9, and a clamp 10; the movable bridge plate 7 cooperates with the track, one end of the articulated arm 8 is installed on the movable bridge plate 7, and the other end is provided with the clamp 10 and the CCD module 9, the clamp 10 operates the vernier part of the vernier caliper and the gauge block in the gauge block fixing area 5, and the CCD module 9 reads the reading of the vernier caliper.

[0027] The movable bridge plate 7 comprises two layers of plates pressed together, a track groove is arranged on the lower layer of the plate, the track groove matches with the track, and a joint arm 8 is installed on the upper layer of the plate.

[0028] The articulated arm 8 includes a plurality of branch joints, and adjacent joints are hingedly connected.

[0029] The clamper 10 is mounted on the end surface of the other end of the articulated arm 8 .

[0030] The CCD module 9 is mounted on the top side of the other end of the articulated arm 8 .

[0031] A pressure sensor 11 is disposed on each inner wall of the two clamping jaws of the clamp 10 .

[0032] When the automatic calibration auxiliary tooling of the vernier caliper of this embodiment is used, the calibration personnel place the prepared gauge block 6 in the gauge block fixed area 5 as needed, and the movable clamping mechanism 4 clamps the vernier part, moves the vernier part to the maximum range of the vernier caliper, and then performs the picking action, picks up the prepared gauge block 6 between the main scale jaw and the vernier jaw, and ensures that one side of the gauge block 6 fits the main scale jaw, and the movable clamping mechanism 4 clamps the vernier part and moves the other end of the gauge block until it fits. When the reading of the pressure sensor 11 exceeds 7N, the fitting action is stopped, and the calibration personnel cooperates with the CCD module 9 to read and input the reading into the terminal for calculation to obtain the indication error. In addition, the calibration personnel can also check the surface condition of the measuring tool to be inspected in cooperation with the CCD module 9, and can also assist in calculating parameters such as zero value error and indication variability.

[0033] It can be seen from the above technical solution that the present invention has the following significant features:

[0034] (1) The movable clamp replaces the action of the calibration personnel to realize the automatic calibration of parameters such as the vernier caliper indication error and zero value error.

[0035] (2) The CCD module amplifies the readings and can assist the calibration personnel in taking readings.

[0036] (3) According to the caliper specifications, multiple sets of matching gauge blocks are placed in the gauge block positioning area at one time to reduce the time for calibration personnel to configure gauge blocks.

[0037] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A vernier caliper automatic calibration auxiliary tool, characterized in that: include: A base (1), a fixed fixture (2), a guide rail (3), a movable clamping mechanism (4), and a gauge block fixing area (5); the fixed fixture (2) and the guide rail (3) are mounted on the base (1), the movable clamping mechanism (4) is mounted on the guide rail (3) and moves along the guide rail (3), both ends of the vernier caliper are fixed on the fixed fixture (2), the gauge block fixing area (5) is arranged on one side of the base (1) and close to the movable clamping mechanism (4), and the movable clamping mechanism (4) operates the vernier part of the vernier caliper and the gauge block (6) of the gauge block fixing area (5) to perform an automatic calibration operation process.

2. The automatic calibration auxiliary tooling for vernier calipers according to claim 1, characterized in that: There are two fixing clamps (2) arranged front and back, one fixing clamp (2) is provided with two positioning clamps for fixing one end of the main scale jaw of the vernier caliper; the other fixing clamp is provided with a positioning clamp for fixing the other end of the vernier caliper.

3. The automatic calibration auxiliary tooling for vernier calipers according to claim 2, characterized in that: The guide rail (3) has two tracks, which are arranged on both sides of the vernier caliper respectively.

4. The automatic calibration auxiliary tooling for vernier calipers according to claim 3 is characterized in that: The movable clamping mechanism (4) is mounted on one of the two tracks.

5. The automatic calibration auxiliary tooling for vernier calipers according to claim 4, characterized in that: The movable clamping mechanism (4) comprises a movable bridge plate (7), an articulated arm (8), a CCD module (9), and a clamp (10); the movable bridge plate (7) cooperates with the track, one end of the articulated arm (8) is mounted on the movable bridge plate (7), and the other end is provided with a clamp (10) and a CCD module (9); the clamp (10) operates the vernier part of the vernier caliper and the gauge block in the gauge block fixing area (5), and the CCD module (9) reads the reading of the vernier caliper.

6. The automatic calibration auxiliary tooling for vernier calipers according to claim 5, characterized in that: The movable bridge plate (7) comprises two layers of plates which are pressed together, a track groove is arranged on the lower layer of the plate, the track groove matches with the track, and a joint arm 8 is installed on the upper layer of the plate.

7. The automatic calibration auxiliary tooling for vernier calipers according to claim 6, characterized in that: The articulated arm (8) comprises a plurality of branch joints, and adjacent joints are hingedly connected.

8. The automatic calibration auxiliary tooling for vernier calipers according to claim 7, characterized in that: The clamp (10) is mounted on the end surface of the other end of the articulated arm (8).

9. The automatic calibration auxiliary tooling for vernier calipers according to claim 8, characterized in that: The CCD module (9) is mounted on the top side of the other end of the articulated arm (8).

10. The automatic calibration auxiliary tooling for vernier calipers according to claim 9, characterized in that: A pressure sensor (11) is respectively arranged on the inner walls of the two clamping jaws of the clamp (10).

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