METHOD OF MACHINING WORM WHEEL, WORM WHEEL, WORM REDUCTION GEAR, AND ELECTRIC POWER STEERING DEVICE

摘要

In a method of machining gear teeth 2 of worm wheel 1 by causing a worm (not shown) on which abrasive or grinding material is added to mesh with the gear teeth 2 of the worm wheel 1, at least the gear teeth of said worm wheel being made of a synthetic resin, and rotating the worm, the machining is performed in such a state that the angle formed by the axis of the worm wheel and the virtual helical axis in forming the gear teeth of the worm wheel is made substantially equal to the angle formed by the axis of said worm wheel and the helical axis of said worm.