HARD FINISHING OF ASYMMETRIC TOOTH PROFILES - SOLUTIONS FOR SERIES PRODUCTION

Abstract

In order to improve load-carrying capacity and noise behavior, gears usually have profile and lead modifications. Furthermore, in gears where a specified tooth-flank load application direction (for drive and coast flanks) is a design enhancement, or even compulsory, the asymmetric tooth profile is a further solution.
Nowadays, many gears need to be hard finished. Continuous generating grinding offers a very high process efficiency, but is this process able to grind asymmetric gears? Yes, it is!
Besides the advantages of the asymmetric tooth profile, the paper will report about the main hard finishing methods for asymmetric gears, such as:
•skive hobbing,
•profile grinding with electroplated CBN disks
• and new, the continuous generating grinding.