Abstract

The contact analysis of the worm gear set with a non-90° crossing angle is investigated in this research. The worm gear set is composed of the ZK-type worm ground by a grinding wheel and the worm gear generated by a straight-edged flyblade. This worm gear set with a non-90° crossing angle provides higher contact ratio compared to those with 90° crossing angle. The mathematical model is derived and the meshing simulations are performed to examine the transmission errors, contact ratios and contact ellipses of this worm gear sets with non-90° crossing angles. The simulation results reflect the special contact nature of this type of gearing.

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