boring opration on lathe akshay khapane 25

7/31/2019 Boring Opration on Lathe Akshay Khapane 25

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Presented by

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Introduction

Types of boring

Boring BarTYPES OF CHUCK

Boring operation

Lathe boring

References

INDEX

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Introduction

In machining, boring is the process of enlarging a holhas already been drilled . by means of a single-pointcutting tool, for example as in boring a cannon barreBoring is used to achieve greater accuracy of the diaof a hole, and can be used to cut a tapered hole. Bori

can be viewed as the internal-diameter counterpart toturning, which cuts external diameters.

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http://en.wikipedia.org/wiki/Machininghttp://en.wikipedia.org/wiki/Drillinghttp://en.wikipedia.org/wiki/Tool_bithttp://en.wikipedia.org/wiki/Tool_bithttp://en.wikipedia.org/wiki/Cannonhttp://en.wikipedia.org/wiki/Turninghttp://en.wikipedia.org/wiki/Turninghttp://en.wikipedia.org/wiki/Cannonhttp://en.wikipedia.org/wiki/Tool_bithttp://en.wikipedia.org/wiki/Tool_bithttp://en.wikipedia.org/wiki/Tool_bithttp://en.wikipedia.org/wiki/Tool_bithttp://en.wikipedia.org/wiki/Tool_bithttp://en.wikipedia.org/wiki/Drillinghttp://en.wikipedia.org/wiki/Machining


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Types of boring

There are various types of boring. Theboring bar may be supported on both ends

(which only works if the existing hole is a

through hole), or it may be supported atone end. Lineboring (line boring, line-boring) implies the former. Backboring(back boring, back-boring) is the process of

reaching through an existing hole and then

boring on the "back" side of the workpiece

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boring bar

Boring head on Morse taper shank. A smallboring bar is inserted into one of the holes. The

head can be shifted left or right with finegradation by a screw, adjusting the diameter ofthe circle that the cutting tip swings through, thuscontrolling the hole size, even down to within 10micrometres if all machining conditions are good.

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http://en.wikipedia.org/wiki/File:Universal_Plan-_und_Ausdrehkopf_von_Wohlhaupter.jpg


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boring bar

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http://en.wikipedia.org/wiki/Boring_barhttp://en.wikipedia.org/wiki/File:Boring_bar_001.jpghttp://en.wikipedia.org/wiki/File:Boring_bar_001.jpghttp://en.wikipedia.org/wiki/Boring_barhttp://en.wikipedia.org/wiki/File:Boring_bar_001.jpg


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Machine tools used

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http://en.wikipedia.org/wiki/File:Fotothek_df_n-18_0000142_Maschinenbauer.jpghttp://en.wikipedia.org/wiki/File:Fotothek_df_n-18_0000142_Maschinenbauer.jpghttp://en.wikipedia.org/wiki/File:Fotothek_df_n-18_0000142_Maschinenbauer.jpg


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TYPES OF CHUCK

- Forholding cylindricalstock centered.- For facing/center

drilling,etc.

Three jawchuck

Four-JawChuck

- This is independentchuck generally has fourjaws , which are adjustedindividually on the chuckface by means ofadjusting screws

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Lathe boring

Lathe boringis a cutting operation that uses asingle-point cutting tool or a boring head toproduce conical or cylindrical surfaces byenlarging an existing opening in a workpiece.

For nontapered holes, the cutting tool movesparallel to the axis of rotation. For taperedholes, the cutting tool moves at an angle to theaxis of rotation. Geometries ranging from

simple to extremely complex in a variety ofdiameters can be produced using boringapplications. Boring is one of the most basiclathe operations next to turning and drilling.

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http://en.wikipedia.org/wiki/Single-point_cutting_toolhttp://en.wikipedia.org/wiki/Single-point_cutting_toolhttp://en.wikipedia.org/wiki/Single-point_cutting_toolhttp://en.wikipedia.org/wiki/Single-point_cutting_tool


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Lathe boring usually requires that the

workpiece be held in the chuck and

rotated. As the workpiece is rotated, a

boring bar with an insert attached to the tipof the bar is fed into an existing hole. When

the cutting tool engages the workpiece, a

chip is formed. Depending on the type of

tool used, the material, and the feed rate,the chip may be continuous or segmented.

The surface produced is called a bore.

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References

Book

work shop Technolgy by Hajra choudry

Advances in Manufacturing Technology C.J Thomas

Website

www. engbasics.com

www. efunda.com

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Thank You

akshaykhapane@gmail com

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boring opration on lathe akshay khapane 25

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