Study on Avoiding Undercutting of Stub Tooth Involute Gear with 22.5 Degree Pressure Angle

摘要

Contrast analysis of the stub tooth involute gear with 22.5 degree pressure angle, and the existing gear with standard pressure angle has been given in this study. Based on the combination of generating method, numerical calculations and simulations, reasons of undercut phenomena for stub tooth involute gear with 22.5 degree pressure angle are researched and analyzed deeply. Minimum teeth without undercutting for considering the rack cutter’s addendum c*m is given based on the traditional undercutting theory, which also illustrated the validity of theoretical derivation.