la the presentation 1 to be class
TRANSCRIPT
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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.