What is Whitworth quick return motion?
What is Whitworth quick return motion?
The Whitworth mechanism is also known as the quick-return mechanism. It represents a revolving crank slider and produces non-uniform stroke movement with slow forward movement and fast backward movement. This mechanism is used in tools, packaging and transport machinery.
How does quick return mechanism work?
Powered by a motor, the disc rotates and the arm follows in the same direction (linear and left-to-right, typically) but at a different speed. When the disc nears a full revolution, the arm reaches its furthest position and returns to its initial position at a quicker rate, hence its name.
Where is Whitworth quick return mechanism used?
5] The Whitworth quick return mechanism is generally used in shaper machines & slotting machine in which forward stroke is slower for machining purposes & return stroke is faster as there is no machining process is to be done.
How Whitworth quick return mechanism and slotted lever mechanism different from each other explain in detail?
Whitworth Quick Return mechanism :- The difference between the crank and lever mechanism and Whitworth mechanism is that in whitworth mechanism the return stroke is faster than the forward stroke while in the crank and lever mechanism the forward stroke is of same speed as that of return stroke. 1) Slotted Bar.
How many types of quick return mechanisms are there?
There are three types of Quick return mechanism: Whitworth Quick Return mechanism. Crank and Slotted Link Mechanism and. Hydraulic Drive.
What is the main advantage of a quick return mechanism?
Advantages of Quick Return Mechanism: The process is automated. The construction of the mechanism is not so complicated. It can perform operations like cutting, flattening and slotting the workpiece. The idle time is reduced because of the fast returning stroke.
What are the advantages of quick return mechanism?
Advantages of Quick Return Mechanism: The construction of the system is not so complicated. It can perform operations such as cutting, leveling and slotting the workpiece. Idle time is reduced due to rapid return stroke.
What is application of slider crank mechanism?
Combustion Engines: Slider-crank mechanism is used in piston cylinder assembly in combustion engines and converts reciprocating motion into circular motion and vice-versa. 3. Rotary Engines: Fixing the crank in the Slider-crank mechanism it can be used to form rotary engines. Rotary engines are used in cars.
Why is Whitworth mechanism called a quick return mechanism?
The slider is free to slide inside the slotted lever. As a result the lever EAD starts rotating about the point A. As shown in figure the forward stroke of the ram is slower and return stroke is faster ( Angle theta is greater than angle beta). Hence this mechanism is called quick return mechanism.
Is quick return mechanism is responsible for Ram movement?
Explanation: Due to the rotation motion of the disc, the ram moves forward and backwards. During half rotation, the ram moves forward whereas during the other half rotation. The ram quickly returns. Thus it converts rotary motion into reciprocating motion.
How many quick return mechanism are there?
What is the purpose of the Whitworth quick return mechanism?
Withworth quick return mechanism is used to increase the speed of a useless stoke in quick return mechanism. This is basically converting a rotary motion into reciprocating motion.
What is the purpose of a quick return mechanism?
A quick return mechanism is an apparatus that converts circular motion (rotating motion following a circular path) into reciprocating motion (repetitive back-and-forth linear motion) in presses and shaping machines, which are utilized to shape stocks of metal into flat surfaces.
What does the Whitworth impacting Press Drive consist of?
The impacting press drive comprises a Whitworth quick return mechanism consisting of a crank and a drive arm together with a variable speed d.c. motor, a flywheel, bearings, etc. The end of the drive arm is attached by a connecting rod to a cycloidal cam.
Which is slower return stroke or forward reciprocating motion?
Unlike the crank and slider, the forward reciprocating motion is slower rate than the return stroke. At the bottom of the drive arm, the peg only has to move through a few degrees to sweep the arm from left to right, but it takes the remainder of the revolution to bring the arm back.