It is another extensively used process of gear finishing and is accomplished by having the gear in contact with one or more cast iron lap gear of true shape. The work is mounted between centers and is slowly driven by rear lap. It in turn drives the front lap, and at the same time both laps are rapidly reciprocated across the gear face. Each lap has individual adjustment and pressure control. A fine abrasive is used with kerosene or light oil to assist cutting action. The largest time of gear lapping is about 15 minutes. Prolonged lapping damages the profiles but in exceptional cases the time may be increased for profile and pitch correction.
Automative gearbox gears finished before case hardening by shaving are usually finally lapped.
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1 comment:
gear hobbing machine is widely used in bangalore
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