Wedge templates can take different forms: one form contains a complete ellipse; the other form is an arc length containing only ellipse, which is usually not a chamfered cylinder, but a polyhedron-like form, suitable for large Lead reference template for diameter gears.
Ball-Wedge Patterns We can manufacture spherical and wedge-shaped templates very accurately, and we can also evaluate their three-dimensional shape accuracy (within 50 nanometers accuracy) very accurately. Due to the high precision, the result of the calibration means that the item or position where the gear detector may be problematic can now be calibrated.
In the calibration process, there is a problem that causes uncertainty, that is, the measurement accuracy of the position state of the template mounted on the gear measuring instrument is not high enough. This problem can be solved well by a combined ball-wedge template (BWA). The structure of the BWA is to integrate the spherical template with the wedge template, as shown in FIG. By using the BWA template, when mathematically finding the cause of uncertainty affecting the accuracy of the detector, the number of unknowns of the mounting position of the template on the detector can be reduced, because during the measurement of the profile calibration and the lead calibration, The position of the BWA in the three-dimensional space on the detector does not change.
in conclusion
The template and calibration method recommended in this paper is only applicable to CNC gear measuring instruments. Most of the gear measuring instruments currently on the market are CNC type instruments. We are convinced that this calibration method is very effective, so we will determine this method as the future Japanese Industrial Standard (JIS), and we will also recommend this method as the ISO standard.
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