QUICK RETURN MECHANISM

A quick return mechanism is a mechanism which produces a reciprocal effect so that the system takes less time in the return stroke while comparing with forward stroke. In the quick-return mechanism, a circular movement like the crank and lever mechanism is converted into reciprocal movement but the return time is different from the forward moment. In several applications, this process is used. Some of them are shaper, slotter, screw-press, mechanical drive, etc. The time required for cutting is reduced with the assistance of a quick return mechanism.   There are three types of quick return mechanism: 1. Hydraulic drive 2. Crank and slotted link mechanism 3. Whitworth mechanism   1) HYDRAULIC DRIVE: Basic Parts of Hydraulic Drive: Ø    Base Ø    Piston Ø    Pump Ø    Control Valve Ø    Relief Valve Ø    Throttle Valve Ø    Ram Ø    Tool Head Ø    Motor...