G H PATEL COLLEGE OF ENGINEERING & TECHNOLOGY

Active Learning AssignmentSubject: 2131906– kinematics of machine

IIIrd Semester, Academic Year 2015-16Batch: 2C19

By:-Uttam TrasadiyaMechanical engineeringGcet college Vvnagar.

Characteristics of involute and cycloidal gear ,Interference and undercutting ,Center distance variation ,Minimum number of

teeth ,Contact ratio.

-: CONTENTS :-

EME653 Experiment on Gears tooth profile, interference etc.mp4

involute gears animation..mp4

Number of teeth

The numbers NP {z1} and NG{z2} represent the number of teeth on the ’pinion’ and ’gear’ respectively. As a default the data of the pinion is input in the left column, the data of the gear in the right column.For spur gears you need a minimum number of 17 teeth to avoid undercut without any profile shift. You can achive a smaller number of teeth with an appropriate profile shift factor or using helical gears.

Contact Ratio

𝐴𝑟𝑐𝑜𝑓 𝑐𝑜𝑛𝑡𝑎𝑐𝑡𝑐𝑖𝑟𝑐𝑢𝑙𝑎𝑟 h𝑝𝑖𝑡𝑐 =

𝐶𝐷𝐶𝑜𝑠 𝜃∗ 𝑃

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