Question

A circular arc cam operates a flat-ended valve tappet, has a base circle radius of 50 mm and a nose radius of 15 mm. The total angle of action is 120° and the lift is 30 mm. The flank radius of the cam equals:

Answer 1

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Giveni a base Circle Radius = 50 mm 8. el, = 50mm , • Nose Radius, M₂ = 15mm • Total Angle of Action = 120° is a = 60° • Lift, x= 30mm We have, Total left + 4 = d t la 30 + 50 = P + 15 d=65mm flank Radius; K = 42 - 2 + d² - 29 d cosa 214, - 2 - d cosa) (50)?- (15)?+ 65°- 2x 50 x 65 x cosbe 2150 -15 - 6.5 X 60 60°) R= 650mm) Aus.

Flank radius is R= 650 mm