Gear grinding

Gear grinding is suitable for finishing of hardened gears which cannot be finished by shaving or Burnishing. Gear teeth grinding processes: 1) Form Wheel grinding 2) Threaded wheel grinding 3) Generation grinding Form Wheel grinding:  Grinding wheel shaped to the exact profile of gear tooth space like disc type form milling cutter.  The teeth are finished one by one and after one tooth finished, the blank is indexed to the next tooth space as in the form milling operation.

Threaded wheel grinding:  Threaded wheel is rotated about it’s own axis and workpiece is also given a rotational movement in mesh with the wheel and periodic in feed given towards the wheel.  This method is fast but lot of time is required to prepare the grinding wheel. Generation Grinding: It uses one or two saucer shaped grinding wheels.  

The work mounted on mandrel between centers and given rotary motion as well as reciprocating motion in lateral direction.  The accuracy of gear tooth depends on accuracy of wheel. Gear grinding process need cares and skilled operator to avoid overheating of teeth. Hardened gears may crack due to overheating unless sufficient care is taken during operation.