It may not be widely recognized, that most of the inspectiondata supplied by inspection equipment following the practices ofAGMA Standard 2015 and similar standards, are not of Elementalaccuracy deviations but of some form of Composite deviations. Thispaper demonstrates the validity of this “Composite” label by firstdefining the nature of a true Elemental deviation and then, byreferring to earlier literature, demonstrating how the commoninspection practices for Involute, Lead (on helical gears), Pitch,and in some cases, Total Accumulated Pitch, constitute Compositemeasurements. The paper further explains how such measurementsoften obscure the true nature of the individual deviations. It alsocontains suggestions as to somelikely source of the deviation invarious gear manufacturing processes andhowthat deviationmayaffectgear performance. It further raises the question of the likelyinconsistencies of some of these inspection results and ofinappropriate judgments of gear quality, even to the point of therejection of otherwise satisfactory gears. Finally, there areproposals for modifications to inspection software, possibly tosome inspection routines, all to extending the benefits of thebasic Elemental inspection process.
- Edition:
- 08
- Published:
- 10/01/2008
- Number of Pages:
- 12
- File Size:
- 1 file , 630 KB
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