JJF 1124-2004Calibration specification for Gear involute Measuring instruments (English PDF)

1 Scope (1)

2 Citations (1)

3 Overview (1)

4 Measurement characteristics (1)

5 Calibration conditions (2)

6 Calibration items (4)

7 Calibration method (4)

8 Expression of calibration results (5)

9 Re-study interval (6)

Appendix A Calibration Certificate Page Format (7)

Gear involute measuring instrument calibration specification this specification specifies calibration items and calibration methods for involute measurement of gear measuring instruments. When being measured by the gear when the instrument has multiple measurement functions, it should be used together with other specifications to fully evaluate the measurement of its different functions.

Sex.

1 Scope

This specification applies to the calibration of involute measurements of various gear measuring instruments, but does not include the upper profile inspection.

instrument.

2 Citations

This specification refers to the following documents.

JJF 1001-1998 General measurement terms and definitions JJF 1059-1999 Measurement Uncertainty Evaluation and Representation GB/T 10095.1-2001 Involute cylindrical gear precision - Part 1. Determining the deviation of the flanks Righteous allowable value Use of this specification should be done with the current valid version of the above cited documents.

3 Overview

Gear measuring instruments can be divided into mechanical and numerical control.

3.1 Mechanical gear measuring instrument involute measurement principle Mechanical gear measuring instruments are single disc type, grading disc type and lever disc type, etc. It is based on gear involute the principle of exhibition, the theoretical involute is generated by the mechanical mechanism, and the actual curve and theory of the device under test are opened by the sensor.

The line trajectory is compared, and the difference is input to the recorder to give an involute deviation curve. Its structure is shown in Figure 1.

3.2 Induction line measurement principle of numerical control gear measuring instrument the numerical control gear measuring instrument adopts the principle of coordinate measurement, through the angle measuring device (circular grating, etc.) and the length measuring device (long Grating, etc.) The coordinate position of the point on the actual curve of the device under test is measured, and compared with the theoretical curve of the involute, the involute is obtained.

Deviation curve. Its structure is shown in Figure 2.

4 Measurement characteristics 4.1 top and bottom coaxiality

4.2 The indication error of the micrometric system

4.3 Instrument tooth profile deviation

4.4 Instrument tooth profile tilt deviation and its left and right tooth surface differences

4.5 Instrument tooth profile total deviation and repeatability the above characteristics are listed in Table 1 for reference during calibration.