Device and method for calibrating cross-ball distance gauge

Abstract

The present invention provides a device and method for calibrating a cross-ball distance gauge calibration gauge, which solves the problem of the influence of wear points on calibration values ​​when using a length measuring machine in conjunction with a measuring rod to detect the cross-ball distance gauge calibration gauge. The device includes a length measuring machine, two conversion joints, and two probes; the two probes are respectively fixed on a movable anvil and a fixed anvil in a detachable manner through the conversion joint; the probe includes a measuring rod and a measuring ball, one end of the measuring rod is fixed on the conversion joint, and the other end is fixed with a measuring ball, and the measuring ball is spherical. By adjusting the measuring platform to move up and down, the measurement value of the wear point is measured, and the value of the wear point is used as the measurement value of the cross-ball distance gauge calibration gauge. The accuracy of the cross-ball distance measurement of the on-site product can be improved, and the service life of the calibration gauge can be extended.

Description

Technical Field

[0001] The invention provides a method for calibrating a cross-ball distance gauge calibration gauge, and in particular relates to a method capable of simultaneously measuring the cross-ball distance and wear point values ​​of the calibration gauge. Background Art

[0002] The initial and periodic calibration of the cross-ball distance gauge calibration gauge uses a length measuring machine and a measuring rod for measurement. However, due to the design structure of the main body, wear points will be generated at the fixed heights on both sides of the calibration gauge during use. This wear point will greatly affect the calibration value and thus affect the measurement of the cross-ball distance of the product.

[0003] like Figure 1 As shown, the wear points are 4 hemispheres. When the length measuring machine is used with a measuring rod to detect the cross-ball distance gauge calibration gauge, the wear points of the calibration gauge are shielded by the measuring rod. Therefore, the non-effective dimensions are measured during each periodic calibration process, and the test results are the annual time-dependent change values ​​of the measuring tool. As a result, the production site often sees the phenomenon that the two measured values ​​vary from 0.02mm to 0.06mm when measuring with the calibration gauge and measuring with an ordinary cross-ball distance micrometer or after changing the cross-ball distance calibration, which brings great risks to production. Summary of the invention

[0004] In order to solve the problem of the influence of wear points on the calibration value when using a length measuring machine and a measuring rod to detect the calibration gauge of a cross-ball distance gauge, the present invention provides a calibration device and method for the calibration gauge of a cross-ball distance gauge. In the process of measuring the actual value of the cross-ball distance, the wear points of the calibration gauge of the cross-ball distance gauge can be accurately measured, and the values ​​corresponding to the wear points are used as the action values ​​for daily use of the calibration gauge, thereby eliminating the influence of the wear points on the calibration value.

[0005] The technical solution of the present invention is to provide a cross-ball distance gauge calibration device, including a length measuring machine, wherein the length measuring machine includes a movable measuring anvil and a fixed measuring anvil;

[0006] Its special features are:

[0007] It also includes two conversion joints and two probes;

[0008] The two probes are respectively fixed on the movable anvil and the fixed anvil in a detachable manner through conversion joints;

[0009] The probe comprises a probe rod and a probe ball. One end of the probe rod is fixed on a conversion joint, and the other end is fixed on a probe ball. The probe ball is spherical.

[0010] Furthermore, the conversion joint is in the shape of a sleeve, including a large-end sleeve, a gradient sleeve and a small-end sleeve; the diameter of the large-end sleeve is larger than the diameter of the small-end sleeve, and the large-end sleeve is integrated with the small-end sleeve through the gradient sleeve;

[0011] The large-end sleeve is sleeved on the outer circumference of the measuring anvil of the length measuring machine; the small-end sleeve is sleeved on the outer circumference of the measuring rod to fix the measuring head.

[0012] Furthermore, the large end sleeve is provided with openings along its radial direction, and screws are inserted into the openings to tighten the movable anvil and the fixed anvil of the length measuring machine, thereby fixing the conversion joint on the movable anvil and the fixed anvil of the length measuring machine.

[0013] Furthermore, the small-end sleeve is provided with a hole along its radial direction, and a screw is inserted into the hole to tighten the measuring rod to fix the measuring head on the conversion joint.

[0014] Furthermore, a positioning block is also provided on the measuring rod. The positioning block is an annular block arranged along the circumference of the measuring rod, and its end face is close to the end face of the small end sleeve of the conversion joint.

[0015] Furthermore, the diameter of the measuring ball is set according to the angle of the teeth of the calibration gauge of the span-ball distance gauge to be tested.

[0016] Furthermore, the diameter of the measuring ball is 4mm-8mm.

[0017] Furthermore, the diameter of one end of the measuring rod close to the measuring ball gradually decreases.

[0018] The present invention also provides a method for calibrating a cross-ball distance gauge calibration gauge using the above-mentioned cross-ball distance gauge calibration gauge calibration device, comprising the following steps:

[0019] Step 1: Install the two probes on the movable anvil and the fixed anvil of the length measuring machine respectively through the conversion joint;

[0020] Step 2: Adjust the movable measuring anvil so that the two measuring balls are in contact, reset the length measuring machine to zero, and then use the gauge block to calibrate the machine to zero position;

[0021] Step 3: Place the calibration gauge of the cross-ball distance gauge to be tested on the measuring platform of the length measuring machine, and adjust the movable measuring anvil so that the two measuring heads are in contact with the two tooth surfaces of the calibration gauge of the cross-ball distance gauge to be tested respectively;

[0022] Step 4: Adjust the horizontal and vertical rotation directions of the measuring platform, observe the indication of the length measuring machine, find the inflection point of measurement, find the maximum value in the horizontal direction, and the minimum value in the vertical direction. After the value stabilizes, the data displayed by the length measuring machine is the measurement value of the cross-ball distance gauge calibration gauge;

[0023] Step 5. Adjust the measuring platform to move up and down and observe the indication of the length measuring machine. If there is a wear point, the measured value will be less than that in step 4, which is the value of the wear point. The value of the wear point is used as the measured value of the calibration gauge of the cross-ball distance gauge.

[0024] The beneficial effects of the present invention are:

[0025] 1. The measuring device and method of the present invention can realize the measurement of wear points of the cross-ball distance gauge calibration gauge during periodic verification, improve the accuracy of cross-ball distance measurement of on-site products, and extend the service life of the calibration gauge.

[0026] 2. The measuring device of the present invention has a conversion joint that is simple to process and easy to install.

[0027] 3. When measuring different types of cross-ball distance gauge calibration gauges, the present invention only needs to replace different probes, and the device has high versatility. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a partial schematic diagram of using a length measuring machine in conjunction with a measuring rod to detect a cross-ball distance gauge calibration gauge in the background technology;

[0029] Figure 2 It is a side view of the calibration device for the cross-ball distance gauge of the present invention;

[0030] Figure 3 It is a partial front view of the calibration device of the cross-ball distance gauge of the present invention;

[0031] Figure 4 It is a schematic diagram of the structure of the conversion joint and the measuring head of the present invention;

[0032] The reference numerals in the figure are: 01 - measuring rod, 02 - wear point, 03 - calibration gauge;

[0033] 1-length measuring machine, 2-cross-ball distance gauge calibration gauge, 3-fixed measuring anvil, 4-movable measuring anvil, 5-conversion joint, 51-large end sleeve, 52-gradient sleeve, 53-small end sleeve, 6-probe, 61-measuring rod, 62-measuring ball, 63-positioning block, 7-measuring platform. DETAILED DESCRIPTION

[0034] The present invention is further described below in conjunction with the accompanying drawings and specific embodiments.

[0035] Combination Figure 2 and Figure 3 The cross-ball distance gauge calibration device of the present invention mainly comprises a length measuring machine 1, a conversion joint 5 and a probe 6, wherein the length measuring machine 1 has a movable anvil 4 and a fixed anvil 3; two probes 6 are respectively fixed on the movable anvil 4 and the fixed anvil 3 in a detachable manner through the conversion joint 5. When calibrating cross-ball distance gauge calibration gauges of different models, it is only necessary to remove the probe and replace it with a probe of the corresponding size.

[0036] from Figure 4It can be seen that the conversion joint 5 is sleeve-shaped, including a large-end sleeve 51, a gradual sleeve 52 and a small-end sleeve 53 which are arranged in sequence; the diameter of the large-end sleeve 51 is larger than the diameter of the small-end sleeve 53, and the diameter of the gradual sleeve 52 decreases linearly from the diameter of the large-end sleeve 51 to the diameter of the small-end sleeve 53.

[0037] Combination Figure 3 The large end sleeve 51 of one conversion joint 5 is sleeved on the outer circumference of the movable anvil 4 of the length measuring machine, and an opening is provided along the radial direction thereof, and screws are inserted into the openings to tighten the movable anvil 4 of the length measuring machine to fix the conversion joint on the movable anvil 4 of the length measuring machine. The large end sleeve 51 of the other conversion joint 5 is sleeved on the outer circumference of the fixed anvil 3 of the length measuring machine, and an opening is provided along the radial direction thereof, and screws are inserted into the openings to tighten the fixed anvil 3 of the length measuring machine to fix the conversion joint 5 on the fixed anvil 3 of the length measuring machine.

[0038] like Figure 4 The probe includes a probe rod 61 and a spherical probe ball 62. One end of the probe rod 61 extends into the small end sleeve 53 of the conversion joint 5, and the other end fixes the spherical probe ball 62. The diameter of the end of the probe rod 61 close to the probe ball 62 gradually decreases. The small end sleeve 53 has openings along its radial direction. The probe 6 is fixed to the conversion joint 5 by inserting screws into the openings to tighten the probe rod 61. It can also be fixed in other detachable ways. The probe 6 can also include a positioning block 63. The positioning block 6 is an annular block arranged along the circumference of the probe rod 61. Its end face is close to the end face of the small end sleeve 53 of the conversion joint, and the length of the probe rod 61 inserted into the small end sleeve 53 of the conversion joint is positioned.

[0039] The diameter of the measuring ball 62 is set according to the angle of the teeth of the calibration gauge of the cross-ball distance gauge to be tested. The diameter can be 4mm, 4.5mm, 5mm, 5.5mm, 6mm, 6.5mm, 7mm, 7.5mm, 8mm, etc.

[0040] The specific measurement includes the following steps:

[0041] Step 1: Select the corresponding probe according to the specifications of the calibration gauge of the cross-ball distance gauge to be tested, insert the probe rod into the small end sleeve of the conversion joint, and tighten it with screws; then, respectively put the two conversion joints on the movable anvil and the fixed anvil of the length measuring machine, and tighten them with screws;

[0042] Step 2: Adjust the movable anvil of the length measuring machine so that the measuring balls of the two measuring heads are in contact, reset the length measuring machine, and then use the gauge block calibration machine to calibrate the zero position; 10mm gauge blocks, 30mm gauge blocks, 100mm gauge blocks, and 150mm gauge blocks can be used for precision calibration respectively;

[0043] Step 3: Place the cross-ball distance gauge calibration gauge to be tested on the measuring platform of the length measuring machine, and adjust the movable measuring anvil so that the two measuring heads are respectively in contact with the two tooth surfaces of the cross-ball distance gauge calibration gauge to be tested; because the two spherical measuring balls are in contact with the tooth surfaces, the wear points will not be shielded during measurement, but the wear points will be found through step 5, and the values ​​corresponding to the wear points will be measured;

[0044] Step 4: Adjust the horizontal and vertical rotation directions of the measuring platform, observe the indication of the length measuring machine, find the inflection point of measurement, find the maximum value in the horizontal direction, and the minimum value in the vertical direction. After the value stabilizes, the data displayed by the length measuring machine is the measurement value of the cross-ball distance gauge calibration gauge;

[0045] Step 5. Adjust the measuring platform to move up and down and observe the indication of the length measuring machine. If there is a wear point, the measured value will be less than that in step 4, which is the value of the wear point. The value of the wear point is used as the measured value of the calibration gauge of the cross-ball distance gauge.

Claims

1. A device for calibrating a cross-ball distance gauge, comprising a length measuring machine, wherein the length measuring machine comprises a movable anvil and a fixed anvil; Features: It also includes two conversion joints and two probes; The two probes are respectively fixed on the movable anvil and the fixed anvil in a detachable manner through conversion joints; The probe comprises a measuring rod and a measuring ball, one end of the measuring rod is fixed on the conversion joint, and the other end is fixed with the measuring ball, and the measuring ball is spherical; The conversion joint is sleeve-shaped, including a large-end sleeve, a gradient sleeve and a small-end sleeve; the diameter of the large-end sleeve is larger than the diameter of the small-end sleeve, and the large-end sleeve is integrated with the small-end sleeve through the gradient sleeve; The large-end sleeve is sleeved on the outer circumference of the measuring anvil of the length measuring machine; the small-end sleeve is sleeved on the outer circumference of the measuring rod to fix the measuring head; The measuring rod is also provided with a positioning block, which is an annular block arranged along the circumference of the measuring rod, and its end face is close to the end face of the small end sleeve of the conversion joint; The cross-ball distance gauge calibration gauge calibration device realizes the calibration of the cross-ball distance gauge calibration gauge, using the following method steps: Step 1: Install the two probes on the movable anvil and the fixed anvil of the length measuring machine respectively through the conversion joint; Step 2: Adjust the movable measuring anvil so that the two measuring balls are in contact, reset the length measuring machine to zero, and then use the gauge block to calibrate the machine to zero position; Step 3: Place the calibration gauge of the cross-ball distance gauge to be tested on the measuring platform of the length measuring machine, and adjust the movable measuring anvil so that the two measuring heads are in contact with the two tooth surfaces of the calibration gauge of the cross-ball distance gauge to be tested respectively; Step 4: Adjust the horizontal and vertical rotation directions of the measuring platform, observe the indication of the length measuring machine, find the inflection point of measurement, find the maximum value in the horizontal direction, and the minimum value in the vertical direction. After the value stabilizes, the data displayed by the length measuring machine is the measurement value of the cross-ball distance gauge calibration gauge; Step 5. Adjust the measuring platform to move up and down and observe the indication of the length measuring machine. If there is a wear point, the measured value will be less than that in step 4, which is the value of the wear point. The value of the wear point is used as the measured value of the calibration gauge of the cross-ball distance gauge.

2. The cross-ball distance gauge calibration device according to claim 1 is characterized in that: The large end sleeve is provided with an opening along its radial direction, and screws are inserted into the opening to tighten the movable anvil and the fixed anvil of the length measuring machine, thereby fixing the conversion joint on the movable anvil and the fixed anvil of the length measuring machine.

3. The cross-ball distance gauge calibration device according to claim 1 is characterized in that: The small end sleeve is provided with an opening along its radial direction, and a screw is inserted into the opening to tighten the measuring rod and fix the measuring head on the conversion joint.

4. The device for calibrating the cross-ball distance gauge according to any one of claims 1 to 3, characterized in that: The diameter of the measuring ball is set according to the angle of the teeth of the calibration gauge of the span-ball distance gauge to be tested.

5. The device for calibrating the cross-ball distance gauge according to claim 4 is characterized in that: The diameter of the measuring ball is 4mm-8mm.

6. The device for calibrating the cross-ball distance gauge according to claim 5, characterized in that: The diameter of one end of the measuring rod close to the measuring ball gradually decreases.

Images