REVIEW PAPER ON WORM GEAR ANAYLASIS

The worm & worm wheel is used in gear box of Winch machine for lifting sand bucket. During working worm wheel fails due to load coming on the teeth. The failure is due to stress concentration. The crack appears at central thickness of tooth. Hence the tooth breaks at the central thickness. The failure of wheel occurs within period of about 20 days. So the company has to replace the worm wheel which is not cost effective. The stress calculation of worm wheel at tooth thickness is a three dimensional problem. This paper represents the review of analysis of stress pattern by using 3D Photoelasticity techniques & FEA technique