WORKSHOP
PRACTICE – II:G204
THEORY/PRACTICAL:
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L
1
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T
0
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P
3
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Credit: 3
Curri. Ref. No.: G204
Prerequisite:
G203
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Total
marks: 100
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Total
Contact hrs :60
Lecture: 15Tutorial:0
Practical:45
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Practical: 100=
End
Term Exam: 50+ P.A : 50
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THEORY Total Periods :
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UNIT
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TOPIC/SUB-TOPIC
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HRS
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1
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CUTTING
TOOLS AND CUTTING MATERIALS : Cutting Tools - Various types of single point cutting tools and
their uses, Single point cutting tool geometry, tool signature and its
effect, Heat produced during cutting and its effect, Cutting speed, feed and
depth of cut and their effect. Cutting Tool Materials - Properties of cutting
tool material, Study of various cutting tool materials viz. High-speed steel,
tungsten carbide, cobalt steel
cemented carbides, stellite, ceramics and diamond.
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2
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2
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LATHE : Principle
of turning. Description and function of various parts of a lathe
Classification and specification of various types of lathe. Drives and
transmission. Work holding devices. Lathe tools: Parameters/Nomenclature and
applications. Lathe operations :- Plain and step turning, facing, parting
off, taper turning, eccentric
turning, drilling, reaming,
boring, threading and knurling, form turning, spinning.Cutting
parameters – Speed, feed and depth of cut for various materials and for
various operations, machining time.Speed ratio, preferred numbers of speed
selection. Lathe accessories:- Centers, dogs, different types of
chucks,collets, face plate, angle plate, mandrel, steady rest, follower
rest, taper turning
attachment, tool post
grinder, milling attachment,
Quick change device for tools.Brief description of capstan and turret lathe,
comparison of capstan/Turret lathe, work holding and tool guiding devices in
capstan and turret lathe.
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3
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3
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DRILLING
:Principle of drilling.Classification of drilling machines and
their description.Various operation performed on drilling machine – drilling,
spot facing, reaming, boring,
counter boring, counter
sinking, hole milling,
tapping.Speeds and feeds during drilling, impact of these parameters on
drilling, machining time.Types of drills and their features, nomenclature of
a drill Drill holding devices.Types of reamers.
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2
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4
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BORING
:Principle of boring. Classification of boring machines and their
brief description.Specification of boring machines. Boring tools, boring bars
and boring heads. Description of jig boring machine.
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2
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5
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SHAPING,
PLANING AND SLOTTING :Working
principle of shaper, planer and slotter. Type of shaper.Type of planers.
Quick return mechanism applied to shaper, slotter and planer machine. Work
holding devices used on shaper, planer and slotter. Types of tools used and
their geometry. Specification of shaper, planer and slotting machine. Speeds
and feeds in above processes.
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6
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BROACHING
:Introduction. Types of broaching machines – Single ram and
duplex ram horizontal type, vertical type pull up, pull down, push
down.Elements of broach tool, broach tooth details – nomenclature,types, and
tool material.
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1
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7
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JIGS
AND FIXTURES :Importance and use of jigs and
fixture. Principle of location. Locating devices.Clamping devices.Types of
Jigs – Drilling jigs, bushes, template jigs, plate jig,channel jig, leaf
jig.Fixture for milling, turning, welding, grinding. Advantages of jigs and
fixtures
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2
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8
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CUTTING
FLUIDS AND LUBRICANTS : Function of cutting fluid.Types of
cutting fluids.Difference between cutting fluid and lubricant.Selection of
cutting fluids for different materials and operations. Common methods of
lubrication of machine tools.
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1
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PRACTICAL 45 :Suggested list of exercises / Job :
Turning Shop
Job 1.Grinding of single point turning tool.
Job 2. Exercise of simple turning and step turning.
Job 3. A composite job involving, turning, taper turning,
external thread cutting and knurling.
Advanced
Fitting Shop
Job 1. Exercise on
drilling, reaming, counter boring,
counter sinking and taping
Job 2. Dove tail fitting
in mild steel
Job 3. Radius fitting in
mild steel
Job 4. Pipe threading with
die
Machine
Shop
Job 1. Prepare a V-Block up to ± 0.5 mm accuracy on shaper machine
Job 2. Exercise on key way cutting and spline cutting on shaper
machine.
SUGGESTED LEARNING RESOURCES:
Reference
Books :
1. B.S. Raghuwanshi Workshop Technology
DhanpatRai and Sons; Delhi
2. M. Adithan and A.B. Gupta Manufacturing
Technology.New Age International (P) Ltd, Delhi.
3. SK Choudhry and Hajra Elements of Workshop
Technology Asia Publishing House
4. A Text Book of Production Engineering. PC Sharma
S Chand and Company Ltd. Delhi