The whit worth quick return mechanism diagram given below. In which mechanism bull gear is rotated about a large fixed pin by pinion.On a fixed pin a crank plate is pivoted eccentrically.The other end of crank plate is connected to ram by the crank plate pin.
When bull gear rotates at constant speed the crank pin with sliding block will rotates on crank circle ,and the sliding block cause the crank plate to rotates about its pivot. the rotation of crank plate pin a long the circle causes the ram to reciprocate.
Position crank pin corresponding to forward position and back ward position of ram. When the crank pin travels completed when the crank pin travels from one position to other ,As the angular velocity of crank pin is uniform ,the time taken for cutting stroke is greater then idle stroke .Thus the quick return motion is obtained by this mechanism .The length of stroke can be adjusted by adjusting the radius of rotation of crank plate pin. The position of stroke may be changed by shifting the position of ram pin.
Position crank pin corresponding to forward position and back ward position of ram. When the crank pin travels completed when the crank pin travels from one position to other ,As the angular velocity of crank pin is uniform ,the time taken for cutting stroke is greater then idle stroke .Thus the quick return motion is obtained by this mechanism .The length of stroke can be adjusted by adjusting the radius of rotation of crank plate pin. The position of stroke may be changed by shifting the position of ram pin.
Whit worth Quick return mechanism cutting stroke is greater than idle stroke.
Reviewed by Sravan29
on
10:03:00
Rating:
Reviewed by Sravan29
on
10:03:00
Rating: