# What is with worth quick return mechanism?

## What is with worth quick return mechanism?

The Whitworth quick return mechanism converts rotary motion into reciprocating motion, but unlike the crank and slider, the forward reciprocating motion is at a different rate than the backward stroke. This mechanism is most commonly seen as the drive for a shaping machine.

## What is a quick return mechanism explain with diagram?

A quick return mechanism is an apparatus to produce a reciprocating motion in which the time taken for travel in return stroke is less than in the forward stroke. It is driven by a circular motion source (typically a motor of some sort) and uses a system of links with three turning pairs and a sliding pair.

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.

Why return stroke is called ideal stroke?

The return stroke or ideal is faster than the forward stroke in this mechanism. A short link PR transmits the motion from AP to the ram which carries the tool and thus forward stroke and backward stroke is obtained.

### What is quick return ratio?

Ratio of time taken for forward stroke to that for return stroke is called Quick Return Ratio. This is also equal to the ratio of angle swept by crank in the corresponding strokes.

### Which of the following is an example of quick return mechanism?

Quick return motion mechanism is used in Shaper machine. The reciprocating movement of the ram and the quick return mechanism of the machine is generally obtained by anyone of the following methods: Crank and slotted link mechanism. Whitworth quick return mechanism. Hydraulic shaper mechanism.

What is the use of Slotter?

Slotting machine is used for cutting grooves, keys and slotes of various shapes making regular and irregular surfaces both internal and external cutting internal and external gears and profiles. Slotter machine can be used on any type of work where vertical tool movement is considered essential and advantageous.

What are the types of quick return mechanism employed mostly in shaping machine is?

Quick return mechanism : Crank and slotted lever quick return motion mechanism. This quick return mechanism is mostly used in shaping machines, slotting machines and in rotary internal combustion engines. In this quick return mechanism, the link AC (i.e. link 3) forming the turning pair is fixed, as shown in fig.

#### What is the difference between Whitworth and quick return mechanism?

FAQ :- What is the difference between Whitworth and quick return mechanism? 1] In the quick return mechanism the arc of motion of the slotted bar is of the same angle in forward and return stroke, While in the case of Whitworth The arc of forwarding stroke and arc of return stroke is a different angle.

#### 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 difference between Whitworth and quick return mechanism? 1] In the quick return mechanism the arc of motion of the slotted bar is of the same angle in forward and return stroke, While in the case of Whitworth The arc of forwarding stroke and arc of return stroke is a different angle.

What is a quick return mechanism and how does it work?

What is the Quick Return Mechanism? A quick return motion mechanism is used in the shaper and slotter machine in which the circular motion is converted into reciprocating motion so that the slider moves forward and backwards. In the forward direction, the cutting process occurs while in return there is no such cutting.

What is the Whitworth mechanism?

This mechanism was invented by Whitworth in the 1800s. The mechanism consists of a slider, crank, fixed link, slotted lever, connecting rod and ram. The crank is connected with the slider and fixed link.

## What are the advantages of fast returning stroke in machining?

It can perform operations like cutting, flattening and slotting the workpiece. The idle time is reduced because of the fast returning stroke. In the returning stroke, there is no contact with the work so no cutting takes place hence the process takes much time to complete.