Whit worth quick return mechanism
In this article, we will learn about Whit Worth Quick Return Mechanism. Often the Whit worth quick return mechanism is used in the slotting machine. The electric motor is surrounded by pinion gear and its core is round the bull gear. A shaft connects the slotted disc and the driving plate. The pin plate is rotated due to the shaft rotating through the driving pin driving plate in bull gear. The slot is cut on the driving slotted disc to rotate the driving pin.
One end of the rod connecting the crank pin through the T – Slot in the slotted disc is attached to the top end of the ram part. This causes the ram to move further down as the slotted disc rotates.
Quick return motion
B is the center of the bull gear. 0 is the center of the driving plate. Bull gear rounds through Pinion. The driving pin E is circling the slotted disk. Now rotate the crank pin 0 into the center of the circle. ram moving distance is twice as long as OC. So you can control the distance of the OC and change the length of the stroke. The ram comes to the top most point when Crank pin Cz. The bottom comes to the point when Bull gear moves to the left of C1. From the top most point to the bottom most point is the cutting stroke. Therefore
The angle T1 is larger than the angle T2. From this, it can be seen that the idle stroke time is short and therefore fast.
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