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Machine tool

A machine which performs the materialremoval operation with tools, to produce

desired shape and size of the work pieces

The purpose of machine tool is to save thetime, cost of production and to get better

output which can not be obtained with

hand tools Ex: lathes, shapers, planers, drilling

machines and grinding machines etc

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ENGINE CENTRE LATHE

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Lathe

The lathe is one of the most importantmachines in any workshop

Its main objective is to remove material from

outside by rotating the work against the

cutting tool

Lathe is used to produce cylindrical jobs

Also used for drilling, threading, grinding and

milling etc

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Working principle of lathe

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Working principle of lathe

The work piece is held in a chuck or between

centres and rotated about its axis at a uniform

speed

The cutting tool is held in the tool post is fedinto a work piece for a desired depth and in

the desired direction

Material is removed in form of chips and thedesired shape is obtained.

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Types of lathes

Speed lathe

Engine or centre lathe

Tool room lathe Capstan and turret lathe

Automatic lathe

Special purpose lathe

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CARRAIGE ASSEMBLY

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CARRAIGE ASSEMBLY

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SPLIT NUT ASSEMBLY

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FOUR JAW CHUCK

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COLLET CHUCK

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COLLET CHUCK

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THREE JAW CHUCK

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LIVE AND DEAD

CENTRES

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LIVE CENTER

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TAIL STOCK

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SINGLE POINT

CUTTUNG TOOL

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LATHE TOOLS

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KNURLING TOOL

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LATHE

OPERATIONS

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MACHINING PROPERTIES

FEED: The distance by which the tool

advanced between two consecutive cuts.

Depth Of cut : The advancement of the toolinto workpiece in transverse direction.

Cutting Speed: The speed at which the

spindle is rotating and machining is being

done.

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TAPER

TURNING

OPERATIONS

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GROOVING

OPERATION

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ASSIGNMENT 1. Explain the principle of machining

2. Explain with neat sketch the working

principle of lathe machine

3. Explain the various parts of lathe machine

and explain the method of specifying a lathe

machine.

4. Name the different operations that ca be

performed on lathe machine 5. Explain the various tools used in lathe

machine.