AGMA 96FTM1

In the spiral bevel and hypoid gear manufacturing industry,master pinions and gears are usually developed from initial machinesettings obtained from computer software such as The Gleason Works’TCA, which are then modified until a satisfactory bearing patternis obtained, as “the target tooth flank form” to compensate forheat treatment distortions and to consider lapping cannot beaccounted for by existing computer software. Once a satisfactorycombination of master pinion and gear is obtained, their actualtooth surfaces may not correspond to those of the theoreticalmodel. In this case, corrective machine settings calculated fromthe measurement of the production tooth flanks by a CoordinateMeasuring Machine (CMM) are applicable only in relation to theactual target tooth flank measurement data, as the theoreticaltooth flank definition is unknown. This paper presents a computerbased approach used to find the machine settings producing atheoretical tooth surface closest to that of a measured surface,which incidentally can be the target tooth flank, what the authorscall Surface Matching, in order to effectively use correctivemachine settings in reference to the theoretical surface. Theapproach is applicable to both first and second order surfacematch, for the Fixed Setting, Spread Blade, Formate and Helixformcutting processes. The Surface Matching algorithm can then be usedin the opposite direction, e.g., to match the measured data to thetheoretical target tooth form definition, such as to calculatecorrective machine settings.

Edition:

96

Published:

10/01/1996

Number of Pages:

11

File Size:

1 file , 890 KB