The accuracy from gear grinding includes desired lead and profile modifications, lower spacing andrunouterrors,and high surface finish. Most of the time, gear grinding isassociated with case-hardened. FigDouble helicalpinion shaftshowing groove for grinding wheel clearance.
The grinding process is particularly suitable for hard materials such as case hardened gears. Generally, this process is referred to as hard finishing. The Reishauer continuous generating grinding process is based on a multi-axes high performance grinding machine equipped with dressable, vitrified bonded grinding worms also called threaded wheels.
The grinding direction is from the ring gear toe at the inner diameter to the ring gear heel at the outer diameter, or vice versa. Only ring gears can be produced by means of plunge grinding. Pinions cannot be ground with this process due to their geometry.
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In some cases, grinding can be utilized to grind gears from solid eliminating the hobbing process. Main Gear GrindinG MeThOds continuous gear generation Profiles an exact gear form into the workpiece. With multiple passes, the wheel grinds the gear teeth to produce the desired gear geometry. Bevel grinding Bevel gears are conically shaped gears.
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