JJF 1233-2010 Calibration specification for double-flank gear meshing measuring instruments JJF1233-2010 Standard download decompression password: www.bzxz.net
This specification is applicable to the calibration of double-flank gear meshing measuring instruments with small and medium module sizes of (0.2~10) mm and measuring diameters ≤200 mm.

National Metrology Technical Specification of the People's Republic of China JJF1233—2010
Calibration Specification for Gear Dual-flank Meshing Measuring Instrument Issued on 2010-01-05
Implementation on 2010-07-05
Issued by the General Administration of Quality Supervision, Inspection and Quarantine JJF1233—2010
Calibration Specification for Gear Dual-flank Meshing Measuring Instrument:Calibration Specification for Gear Dual-flank Meshing Measuring Instrument JJF1233—2010
Replaces JJG94—1981
Replaces JJG96—1986
This specification was approved by the General Administration of Quality Supervision, Inspection and Quarantine on January 5, 2010, and came into effect on July 5, 2010.
Responsible unit: National Technical Committee on Geometric Length Metrology Drafting unit: Beijing Institute of Metrology and Testing Science, China Institute of Metrology
This specification shall be interpreted by the responsible unit
Architecture 321---Standard Query Download Network
|tt||Drafters of this specification:
JJF1233—2010
Yang (Beijing Institute of Metrology and Testing Science) Zhang Wei (China Institute of Metrology)
Wang Weinong (China Institute of Metrology) Cui Zhenxiao (Beijing Institute of Metrology and Testing Science) Institute of Science and Technology) 2
References ·
4 Overview
Measuring principle of double meshing instrument
4.2 Accuracy grade of measuring gears ·
5 Metrological characteristics ·
6 Calibration conditions.
6.1 Environmental conditions..,
6.2 Calibration standard instrument
Calibration items and calibration methods
7.1 Oblique circular runout of main center...
JJF1233—2010
7.2 Radial circular runout and end face runout of rotating sleeve 7.3 Longitudinal Indication error of ruler…
7.4 Indication error of micrometer system…
7.5 Radial comprehensive total deviation of double-meshing instrument·
Variability of indication of radial comprehensive total deviation of double-meshing instrument: 7.7 Measuring gear level
Calibration result processing:
Recalibration time interval·
Appendix A Radial comprehensive total tolerance
Appendix B Example of measurement uncertainty analysis of indication of radial comprehensive total deviation of double-sided meshing gear measuring instrument (1)
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1 Scope
JJF1233—2010
Calibration specification for double-flank gear meshing measuring instrument
This specification is applicable to the calibration of double-flank gear meshing measuring instruments with small and medium module (hereinafter referred to as double-flank gear meshing instruments) with a module of (0.2～10)mm and a measuring diameter ≤200mm. 2 References
This specification references the following documents:
GB/T3374—1992 Basic terms for gears
GB/T10095.1--2008idtISO1328-1:1997 Cylindrical gear precision system Part 1: Definition and allowable values ​​of tooth surface deviation on the same side of gear teeth
GB/T10095.2—2008idtISO1328-2:1997 Cylindrical gear precision system Part 2: Radial combined deviation and radial runout Definition and allowable value of dynamic GB/T13924--2008 Involute cylindrical gear precision inspection rules
JF1001-1998 General metrological terms and definitions JJF1059---1999 Evaluation and expression of measurement uncertainty JF1094-2002 Evaluation of measuring instrument characteristics JJG1008--2006 Standard gear
JJG34--2008 Indicator table
When using this specification, attention should be paid to using the current valid versions of the above-mentioned references. 3 Terms
3.1 Master gear
Refers to the gear used to mesh with the gear being measured and to check the radial comprehensive deviation of the gear being measured. The master gear is one of the main components of the double meshing instrument.
3.2 Reference master gear The reference master gear has been inspected by the relevant metrology department and meets the requirements of GB/T10095.1-2008 "Cylindrical gear precision system Part 1: Definition and allowable value of tooth surface deviation on the same side of gear teeth" for spur gears with precision of grade 4 and above. This standard gear is mainly used to verify the radial comprehensive deviation items of the double meshing instrument. 4 Overview
4.1 Measurement principle of double meshing instrument
The double meshing instrument is used to test the radial comprehensive deviation of a single gear to be measured. The basic structure of the double meshing instrument is to install two slides with shafts on the machine body: one is used to install the measuring gear, and the other slide with a spring device is used to install the gear to be measured. The measuring gear is one of the main components of the double meshing instrument. When the double meshing instrument is working, the measuring gear installed on the slide and the gear to be measured are double-sided meshed in the radial direction without clearance. During the process of two gears rotating and meshing, due to the error of the gear being measured, the center distance between the two gears will change. The change is recorded by the micrometer device and is the radial comprehensive deviation. (See Figure 1) Figure 1 Measuring principle of double-sided meshing measuring instrument for gears 1-Measuring gear; 2-Main carriage, 3-Radial tension spring; 4-Gear being measured; 5-Measuring clearing frame; 6-Micrometer device; α-Adjusted center distance 4.2 Accuracy level of measuring gears
The accuracy level of the measuring gears equipped with the double meshing instrument is shown in Table 1. Table 1 Accuracy grade of measured gear
Accuracy grade of measured gear
(GB/T10095.2—2008)
Grade 4 and below
Grade (5-6) and below
Grade 7 and below
5 Metrological characteristicsbZxz.net
Accuracy grade of measured gear
(GB/T10095.1-2008)
The maximum allowable error of the oblique circular runout of the main center (grating type shaft system) is 0.003mm; 5.2 The maximum allowable error of the radial circular runout and end face runout of the rotating sleeve is 0.003mm; 5.3 The indication error of the longitudinal scale: ±0.04mm; The maximum allowable error of the indication change before and after tightening is 0.02mm ;5.4 The maximum allowable error of the indication error of the micrometer system is 0.003mm; 5.5 The radial comprehensive total deviation of the double-meshing instrument: For the instrument to be used to measure the gear under test with grade 4 accuracy (GB/T10095.2), the maximum allowable error is the smaller value of 1/2 of the radial comprehensive total tolerance value of grade 4 (GB/T10095.2) and 0.005mm; For the instrument to be used to measure the gear under test with grade 5 accuracy and below (GB/T10095.2), the maximum allowable error is 1/3 of the radial comprehensive total tolerance value of its corresponding grade (GB/T10095.2);
5.6 The maximum allowable error of the indication variability of the radial comprehensive total deviation of the double-meshing instrument is 0.002mm; 5.7 Gear level.
Note: The above technical indicators are only for reference during calibration and are not used for qualification judgment. 2
6 Calibration conditions
6.1 Environmental conditions
JJF1233—2010
6.1.1 Temperature: Calibration room temperature (20±5)°C; 6.1.2 Relative humidity: ≤70%.
6.2 Calibration standards
See Table 2 for calibration standards.
Table 2 Calibration standards
Calibration items
Oblique circular runout of main center
Radial circular runout and end face runout of rotating sleeveIndication error of longitudinal scale
Indication error of micrometer system
Radial comprehensive total deviation of double meshing instrument
Indication variability of radial comprehensive total deviation of double meshing instrumentCalibration items and calibration methods
Standards used
1μm torsion spring comparator or micrometer
1μm torsion spring comparator or micrometer
5 equal blocks
3 equal blocks
Standard gears (cylindrical spur gears with the same module)Standard gears (cylindrical spur gears with the same module)Before calibration, the double meshing instrument should be placed on a stable workbench and the instrument should be kept level. The measuring force should be adjusted according to the instrument manual, and it should be confirmed that there are no appearance defects and mechanical faults that affect the correct implementation and calibration results of the calibration.
7.1 Oblique circular runout of the main top
The oblique circular runout of the main top is for the rotatable top. Place the table stand of the torsion spring comparator or micrometer on the instrument base, and the probe is in vertical contact with the cone surface at a distance of (3 to 5) mm from the tip of the top. Rotate it for 2 weeks, and the maximum change is the oblique circular runout.
7.2 Radial circular runout and end face runout of the rotating sleeve. The probe of the torsion spring comparator or micrometer is in contact with the outer circle and end face of the rotating sleeve respectively, and the rotating sleeve is rotated for 3 weeks. The maximum change is the radial circular runout and end face runout. 7.3 Indication error of the longitudinal scale
This calibration should be carried out at no less than three points evenly distributed within the measurement range of the longitudinal scale. Place the gauge blocks of corresponding sizes between the two spindles in turn, and make the indicator zero, read from the longitudinal scale and the vernier, tighten the handle and read again, the difference between the two readings should not be greater than 0.02mm, and the difference between any reading and the L value should not exceed ±0.04mm. L=M+(d/2+dz/2)
Where: L
the theoretical size of the longitudinal scale;
M-the actual value of the gauge block;
d1, d2--the actual values ​​of the diameters of the two standard spindles. 3
7.4Indication error of the micrometer system
JJF1233-2010
According to the corresponding national metrology verification regulations for the indicator table. 7.5 Radial comprehensive total deviation of the double meshing instrument
Install a pair of standard gears (meeting the requirements of Table 1) on the two spindles of the double meshing instrument and adjust them to the meshing state according to the theoretical center distance of the selected gears. Determine a starting point, start recording the indication after meshing and rotating for 1 circle, and take the average value of three measurements as the measurement result of the radial comprehensive total deviation. For grating instruments, this error should be calibrated at four positions of the circular grating respectively, and the maximum value should be taken as the measurement result. In addition, for instruments with measuring gears, if the measuring gear meets the requirements of Table 1, it is allowed to mesh with a standard gear to calibrate this item. 7.6 Variability of indication of radial comprehensive total deviation of double meshing instrument Install two standard gears on the two spindles of the double meshing instrument and adjust them to the meshing state according to the theoretical center distance of the selected gears. Determine a starting point, mesh and rotate for 5 circles, and take the difference between the maximum and minimum values ​​of the radial comprehensive total deviation as the variability of the indication of the radial comprehensive total deviation of the instrument.
7.7 Measuring gear level
Submit for inspection according to the corresponding national metrological verification procedures for standard gears. 8 Processing of calibration results
A calibration certificate should be issued after calibration of the double meshing instrument. 9 Recalibration time interval
The unit sending the instrument for calibration can decide the recalibration time interval according to the actual use of the instrument. It is recommended that it should not exceed 1 year. 4
Appendix A
Pitch circle diameter
5≤d20
20
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