MEE104:WorkshopPracticeIIManual

B.Tech(Mechanical)IISemester

CompiledandEditedbyProf.P.JeyarajandProf.S.RajaKumar

SCHOOLOFMECHANICALANDBUILDINGSCIENCES

January2011

MEE104 WORKSHOP PRACTICE - II 0 0 2 1 Version No. 1.0 Prerequisite MEE102 Workshop Practice Objectives: 1. To train the students in safety handling of tools, equipment and

machineries. 2. To carry out exercise in metal removal process by using drilling and lathe machines. 3. To train students in plumbing operation and techniques. 4. To expose the student in house wiring. 5. To train students in basic carpentry exercise using modern Bosch Tools.

Expected Outcome:

On completion of this course, the students will be able to 1. Basic operation in drilling and lathe. 2. Plumbing and simple house wiring. 3. Basic wooden components

Unit I Machine Shop 1. Drilling and Countersinking using Drilling machine 2. Drilling and Tapping 3. Lathe Exercise - Facing operation 4. Lathe Exercise - Straight turning and Chamfering Unit II Plumbing Shop 1. L Joint 2. T - Joint Unit III House Wiring Shop 1. Single point wiring 2. Staircase wiring Unit IV Bosch Tools Exercises 1. Planning & Polishing operation 2. Sawing operation 3. Profile cutting 4. Making of rectangular slot Text Books Workshop Manual prepared by VIT staff Mode of Evaluation Tutorials / Class Tests / Lab Exam Recommended by the Board of Studies on: 23.5.2008 Date of Approval by the Academic Council: 16.6.2008

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LatheALathe isan importantandoldestknownmachinetool inanyworkshop.The jobtobeturned isheldand rotated in a chuck, or face plate, or catch plate, or between centers. A suitable cutting tool isadvancedagainstrotatingjob.Sincethecuttingtoolmaterialisharderthantheworkpiece,themetaliseasilyremovedfromthejobintheformofchip.Asinglepointcuttingtoolisusedtoremovematerial.TheprincipalpartsofLathemachineareshowninthefigurebelow

Figure 1. Lathe

PURPOSE

Primarilyusedforcylindricallysymmetricturning,facing,drilling,andboring

HOWTOOPERATE

Securejobinthechuckorcollet

Installappropriatetool,makesurethetoolisinproperpositioninthetoolpostortailstock

Setspeedfortooltype,jobdiameter,andmaterial

Indicateonjobortakelightcutstoestablishdimensions

Chooseappropriatespeedbychanginggears,includingfeedchanges,whilethelatheisidle

MAKESURETHECHUCKISRUNNINGINTHECORRECTDIRECTION

Aftertheoperation,returntoolsandcleanmachine

Ifproblemarises,shutmachineOFFandasktechnicianforhelp

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Parts of Lathe

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Figure2.PartsofaLathe

CAUTION

Donttouchtoolorchipswhilemachineisrunning

Makesureworkpieceisclampedtightlyinchuck

Becarefultostayclearofchuckjaws

CLEANUP

Turnoffmachine

Brushallchipsoffmachineandsweepfloor

Alwaysleavemachineclearofobjectsandclean

Returnalltoolstotheirproperlocations

Latheoperations:

Turning

Turningoperationsinvolverotatingtheworkpiece/jobandbringingitintocontactwithafixedturningtool.Turningisperformedonalathe.Mostly, turningmakesparts thathavea round cross section suchasscrews,shafts,pistons,etc.

Facing

Facing is the process of removing metal from the end of a work piece toproduceaflatsurface.Mostoften,theworkpieceiscylindrical,butusinga4

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jawchuckrectangularoroddshapedjobcanbefacedtoformcubesandothernoncylindricalshapes.

Boring

It isused toenlargeaholeor cylindrical cavitymadebyapreviousprocessortoproducecircularinternalgrooves.

Drilling:

Itisusedtoproduceaholebyfixingadrillingtoolinthetailstock

Threading:

Itisusedtoproduceexternalorinternalthreads

Knurling:Itisusedtoproducearegularlyshapedroughnessoncylindricalsurfaces

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DrillingMachine

Drillingmachine isused toproducea roundhole in theworkpiece.The toolused fordrillingholes iscalledDrill.TheDrillisplacedinthechuckofthemachinewhichrotatesaboutitsaxis.Thelinearmotionisgiventothedrilltowardstheworkpiecetoproducehole.TapAtap isatoolusedformaking internalthreads.Thetapsareprovidedwithcuttingedgesandthreeorfourflutescutacrossit,sothatwhenitisturnedintoahole,itcutsaninternalthread.Thesearemadeinsetsofthree.Firstusetapertap,thenmediumtapandthenbottomingorplugtap.Thesearemadeofhighcarbonsteelorhighspeedsteelandhardenedandtempered.Thecommonoperationsperformedondrillingmachinearedrilling,boring, reaming, tapping,counterboring,etc.PrincipalpartsofthedrillingmachineareshowninFigure.

Figure3.DrillingMachine

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PLUMBING

Whatisplumbing?

Plumbing is the art of design, installation and maintenance of pipe, pipe fittings and otheraccessoriesinabuildingtosupplywater.Plumbing includesallthepipingand fixturesthatprovidewater fordrinking,cooking,bathing,andlaundry; aswell as ameans of disposingwastewater. Plumbers rely onmath tomake accuratemeasurementsandcalculationssoallthepipesandtanksfittogethertoworkproperly.There are two types of Plumbing Systems one isWater Supply System another one isDrainage,Waste,andVenting(DWV). Watersupplysystemdistributeswaterunderpressurethroughoutthestructure fordrinking,bathing, cooking,and laundry. DWV system carriesawaywastewaterandsolidwastefrombathrooms,kitchens,andlaundries.Thissubsystemisnotunderpressure,andmustbeproperlyisolatedtopreventwastewaterfromenteringthedrinkingwatersupply.

ThePlumber:Plumberisapersoninvolvedintheartofplumbing.WhatisPVCpipe?

Apolyvinyl chloride(PVC) pipe ismade from a plastic andvinylcombinationmaterial.Thepipesaredurable,resistant todamage,and long lasting.APVCpipe does notrust, rot, orwear over time. For those reasons, PVC piping ismostcommonlyusedinwatersystems,undergroundwiring,andsewerlines.

PVCwas first developed in 1925when a BFGoodrich employee,Dr.WaldoSemon,attempted to inventamethod forbondingmetaland rubber.Afterblendingmaterialstogether to create a strong and flexible material, Semon discovered PVC. Nonetheless, theproductremainedvirtuallyuselessforanotherdecade.Inthelate1930's,PVCwasfoundtohavegreatshockabsorbingabilities.Thisdiscovery ledtothecreationof long lastingPVCtiretreads,whichwerecreatedwithflexibleformsofPVC.

WhatisGI(GalvanizedIron)pipe?

These pipes are widely used for conveying raw water and distribution oftreated water in majority of rural water supply schemes, where therequirement of water is less. Mostly medium quality GI pipes are used.Thesepipesarecheap,andeasy tohandleand transportandeasy to join.Theirsizesvaryfrom15mmto150mm.

PlumbingtoolsTheplumberstoolbeltcarriesmanyofthesametoolsusedincarpentryand

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electricalwork. Simpleplumbing tasksonly requirea few tools,mostcommonlyawrenchwhilelargerplumbing jobsuseavarietyof toolswhich includeswrenchesandother toolsused tomeasure,align,mark,cut,reamandthread.

Measuringtools:Rulers,MeasuringtapesandsquaresMarkingtools:Pencil,chalk,compass,anddivider.Cuttingtools:Varioussaws,files,chisels,snips,andpipecutters.Reamingandthreadingtools:Reaming isusedtomakeaperfecthole,afterdrillingandbeforethreadcuttingAdjustable wrench: The adjustable wrench is often considered one of the mostversatileof tools.Whileordinarywrenchescanbeusedonaparticularsizeofpipe,adjustablewrenchescanfitamuchwidervarietyofsizes.Teflon Tape: This is an essential tool forpreventing leakage at threadedplumbing joint connections.

Teflon tape is a versatile, common, inexpensive thin white tape used toeffectivelysealpipethreadsbeingjoinedtogetherforplumbingpurposessuchasshowerheadsandthreadedwaterlineconnections.It'salsousedtosealairandgas from leaking through threaded connections like at your dryer. Knowntechnically as PTFE (PolyTetraFluoroEthylene), it is silky in texture and beingstrongintension,itbreaksinastringymanner.Teflontapeissoldinsmallrolls.

PipecutterWhenaplasticormetalpipeneedstobecutcleanlyandquickly,apipecutter isthe idealtoolforthe

job.Usingasawcanbedifficultandmessy,andusingahingedscissorlike cutting tool with two opposing blades will often produceundesirableeffectssuchascrimpingorbreakingoftheendofthepipe,especiallyonthosemadeofmetal.Therearetwomajordifferenttypesofpipecuttersplasticpipecuttersandmetalpipecutters.Theycan

comeinawidevarietyofsizesandconfigurationsforcuttingpipesofvaryingmaterials,sizesandshapes.Pliers

Pliersarethemostcommontoolsusedbyplumbers.Cuttingpliersareused forholdingandcuttingthinjobs.

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PipethreadingdiesIt isalsocalledas stocksanddies.Two typesofdiesareavailableviz., solidandadjustable.Theyarefittedintothecentreoftheframe.Diesareheldinpositionbyablockwhichisadjustablebymeansofatommybar.This stock cutsparallelthreads. Separate set of dies arerequiredforeachpipesize.Threadedtaps

Threadedtapsareusedforcuttinginternalthreadsonafitting.Threetypesoftaparenecessarytocutthreads.Tapertapisusedfirstwhichcutslightthreads.Thenplugtapisusedandfinallybottomingtapisusedwhichcutthethreadstotherequireddepth.

Plumbbob:isusedforcheckingverticallines.Itismadeupofsteelorbrass.Itisfittedwithmercuryto provide a low centre of gravity and largeweight in proportion to its short length and smalldiameter.PIPEFITTINGS

Socket:Itsoutsidediameterislargerthanthediameterofthepipewhileinsidediameterisequaltothatofthepipesdiameter.Itisusedtobringtwopipesinastraightdirection.

Elbow:Itissimilartothesocket.Itisusedforfittingtwopipesatrightangles.Internalthreadsarecutintheelbows.Bend:Itsdiameterisequaltothesizeofthepipeandusedatcornersinpipefittingjobs.Threads are cut on both ends and it is joined to the socket and point. The waterpressuredoesnotbecomelowbyusingbend.

Tee:Itisusedforgivingconnectionfromthemainpipelinetobranchline.Byusingit,twomorelinescanbemadefromthesupplyline.

Fourwaycross:Itsshapeislike(+)sign.Itisusedforfittingapipeinallfourdirections.Threadsarecutinallitsfourends.

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Valves: Pipes can be joinedwith valves to control the flow ofwater through the pipes.Globevalvecontrolsthefluidflowinapipeline;however,thepassageofflowisrestricted.Checkvalveisusedtopreventreverseflowinapipeline.

Cock:Itiscalledastap.Itservesthepurposeofputtingofforontheflowingwaterthroughpipes.Itismadeofcopper,plastic,gunmaterial.Pipeunion: Itconnectstwopipes.Watermeter isfittedwithunionsothattheycanberemovedeasily.Itprovidesfacilitytodisconnectpipes.Nipple: It isashortpieceofpipe(length lessthan300

mm). It consists of three parts in that two pipe ends and third one,whichisanut,drawsthepipestogethertightly.

Coupling:Shortcylindricalsleevewith internalthreads throughout its length. It isusedforjoiningtwopipesinastraightlineandwhereatleastonepipecanbeturned.

Bush: It is short sleeve like piece, used to reduce the size of a threaded opening. It isthreaded inside fully throughout its length and threaded outside at one end. The otherouterendishexagonshaped.

Plug:Shortpiecewithexternalthreadsatoneendandsquareendontheothertoreceivethe spanner for operation. It is used to screwonto a threaded opening, for temporaryclosing.Acapmaybeusedforclosingexternalthreadedopeningtemporarily.

Flange:Itcontainsinternalthreadsinthehubandholesinthebodytoreceivebolts.Two pipes may be joined together in line, using flanges and bolts. Flanges areavailableineitherovalorincircularshapes.Socketreducer:Itisusedtoconnectabigpipetoasmallpipefacetoface

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PLUMBINGSYMBOLS

HOUSEWIRING

Electricity is defined as flow of electrons. Electricity is one of the essential and useful sources of

energy.Electricity isused indomesticaswellas industrialappliances,equipments.Theflowofelectrons

throughaconductorisknownaselectriccurrent.

DCpowersupply: It isrepresentedbythesymbol.Thistypeofsupply isused inbatteries,motors,

generators. The voltage remains constant throughout the cycle with time variations. In this type of

supply,thedirectionofflowofcurrentisfromthepositiveterminalofsourcetothenegativeterminal.

ACpowersupply: It isrepresentedbythesymbol~.Herethevoltage ischangingatregular intervals.

Theterminalsarerepresentedatphase/lineandneutral.ThesourceofACsupplyisACgenerators.

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ImportanceofthepolarityinDC

Directcurrentsupplyhasfixedpolarity,positiveandnegativemarkedas+and.Thepositiveterminalof

theelectricdevicemustbeconnectedtothepositiveterminalofthesourceandnegativeterminaltothe

negativeofthesource.Ifthepolarityisnotobservedcorrectly,thenthedevicewillnotfunctionproperly

anditmaybedamaged.

WiringMaterialsandAccessories:

Switch:Itisusedtomakeorbreakanelectriccircuit.Inanelectricalinstallation,eachloadisrequiredto

beswitchONandswitchOFF,thesupplyisdeadwhentheswitchisatOFFposition.

Lampholdersareusedtosupportthelampandalsotoconnectitelectricallytothesupplysystem.Lamp

holders are normally available with Bakelite exterior and porcelain interior or brass exterior with

porcelaininterior.BrassholdersarecostlierbutdurablecomparedtotheBakelitelampholders.

Lampholderadoptersareusedfortappingtemporarypowerforsmallportableelectricalappliances.

Plugisusedfortappingpowerfromsocketoutlets.Theelectricalsupplyfromthesocketoutletsisgiven

totheportableapplianceslikeradio,tablefanetcwiththehelpofplug.

Socketoutlet iscontrolledbyaswitch locatednearto it.Theswitchshouldbeonthe livesideofthe

wire. In earthed system of supply, a socket outlet of three pin plug type with third terminal being

connectedtotheearth.

Mainswitchcontrolsallthesubcircuitsprovided inthebuilding.Thefunctionofthemainswitch isto

controlthecompletelightingsystemofthebuilding.

Distributionpanelboard isarectangular ironboxwithanumberofcarriertype fuses fitted in it.The

numberof fusesdependson thenumberof subcircuits.The fusebank in thedistributionboard can

easilyberemoved.

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Earthing:Whenawireisconnectedfromthegroundtotheelectricalappliances,itattainszeropotential

andtheapplianceissaidtobeearthedandthisprocessisknownasearthing.Thepurposeofearthingis

toprovideprotectiontohumanbeing,electricalappliancesandcircuits.

Fuseisasafetydeviceusedforthepurposeofprotectingacircuit,againstexcesscurrent.Whenexcess

current flows through the fuseelement, itmeltsandopens the circuit, therebyprotecting the circuit

fromdamage.

TripSwitch:TripSwitch isanautomaticallyoperatedelectricalswitchdesignedtoprotectanelectrical

circuitfromdamagecausedbyoverloadorshortcircuit.Itsbasicfunction istodetectafaultcondition

and,byinterruptingcontinuity,toimmediatelydiscontinueelectricalflow.Unlikeafuse,whichoperates

onceand thenhas tobereplaced,acircuitbreakercanbereset (eithermanuallyorautomatically) to

resumenormaloperation.

Toolsusedinwiring

CuttingPlierisusedforcutting,twistingandholdingwires

Flatnosepliersareusedforholdingflatobjectslikethinplates.

Screwdriverisusedfortighteningthescrewsinswitchboard.

Neon testerconsistsofaglass tubewithneongasandelectrodeat theends. It isused tocheck the

presenceofsupplywhichisindicatedbytheglowoflampwiththetipofthetesteronthelivesupplyand

thebrasscontactontheotherendoftesterbyhand.

ElectricianKnifeisusedforcutting,shavingtheinsulationcablesandcleaningthewiresurface.

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WORKSHOPPRACTICEII(MEE104)LISTOFEXERCISES

MachineShop

1. DRILLINGANDCOUNTERSINKING2. DRILLINGANDTAPPING3. FACING,STRAIGHTTURNINGANDCHAMFERINGOPERATIONINALATHE4. STEPTURNINGOPERATIONINALATHE

Plumbing

5. MAKINGOFTEEANDELBOWJOINTSOFPVCPIPESUSINGPLUMBINGWORK6. MAKINGOFTEEANDELBOWJOINTSOFGIPIPESUSINGPLUMBINGWORK7. MIXEDPIPELINEASSEMBLY

Housewiring

8. STAIRCASEWIRING9. FLUORESCENTLAMPWIRING10. HOUSEWIRING

Carpentry

11. DOVETAILJOINT12. MORTISEANDTENONJOINT13. PROFILECUTTING

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DRILLINGANDCOUNTERSINKING

Ex.No.1Date:Aim:TodrillandcountersinkontheMSflatasperthegivendimensions.Toolsrequired: Column Drilling Machine, Steel rule, Try square, Scriber,Flat file, Go gauge, NoGo gauge, Chalk powder, Center punch, Center/Pilotdrillof5mm,Verniercaliper,drillbitofdiameter7mm,9mmand12mm,BallpeenhammerMaterialrequired: MSflatofsize50x50x10mmWorkingProcedure:

1. CheckthedimensionsofthegivenMSflatusingsteelruleandchecktheedgesoftheMSflatusingtrysquarefortheirperpendicularity

2. Fileanyexcessmaterialandburrsusingflatfileandensurethatallsidesarefreefromburrs.

3. PolishthetwosurfacesoftheMSflatbyremovingthedirtandrustwiththehelpofflatfileandapplywetchalkpowderononesurfaceoftheflatandallowittodry

4. Locatethepositionofholesusingsteelrule,trysquareandscriberaspergivendiagramandmarkthelocationofholeswiththehelpofcenterpunchandballpeenhammer.

5. Clamp the MS flat in the machine vice of the column in the drillingmachine

6. Mountthepilotdrillinthedrillingmachinewiththehelpofdrillchuckandmakemachinespindletorun.

7. Switchonthedrillingmachineandgivefeedusingfeedhandle.8. MakepilotdrillsonthepreviousmarkedlocationoftheMSflat.9. Stopthemachineandremovethepilotdrillfromthedrillchuckand

insertappropriatesizetwistdrillbitinthedrillchuck10. Again switch ON the machine and give feed using spindle feed handle

anddrillthehole.11. Maketheremainingholesinthesameway12. Stopthemachineandremovethejobfromthedrillingmachineviceand

checkthediameteroftheholeandcenterdistanceoftheholesusingGONOGOgaugeandverniercalipers.

13. Use 12 mm countersink drill bit and make countersink in the holesdrilled.

14. Clean the drilling machine table using wire brush and collect allchipsandputtheminchipcollectingbin.

Result:ThedrillingandcountersinkinghasbeenperformedonthegivenMSflataspergivendimensions.

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Alldimensionsareinmm

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DRILLINGANDTAPPING

Ex.No.2Date:Aim: To make drill and internal threads on the MS flat as per the givendimensions.Toolsrequired: Steelrule,Trysquare,Scriber,Tap,Tapwrench,Flatfile,Go gauge, NoGo gauge, Chalk powder, center punch, Center/Pilot drill,Verniercaliper,Drillchuck,Twistdrillbitofdiameter8.5mm,BallpeenhammerMaterialrequired: MSflatofsize50x50x10mmWorkingProcedure:

1. CheckthedimensionsofthegivenMSflatusingsteelruleandchecktheedgesoftheMSflatusingtrysquarefortheirperpendicularity

2. Fileanyexcessmaterialandburrsusingflatfileandensurethatallsideisfreefromburrs.

3. PolishthetwosurfacesoftheMSflatbyremovingthedirtandrustwiththehelpofflatfileandapplywetchalkpowderononesurfaceoftheflatandallowittodry

4. Locatethepositionofholesusingsteelrule,trysquareandscriberaspergivendiagramandmarkthelocationofholeswiththehelpofcenterpunchandballpeenhammer.

5. Clamp the MS flat in the machine vice of the column in the drillingmachine

6. Calculatethecuttingspeedv=DN/1000inm/min,whereDdiameterofpilotdrillinmm,Nrotationalspeedofthespindleinrpm.

7. Mountthepilotdrillinthedrillingmachinewiththehelpofdrillchuckandmakemachinespindletorun.

8. Switchonthedrillingmachineaspertheprecalculatedrpmandgivefeedusingfeedhandle.

9. MakepilotdrillsonthepreviousmarkedlocationoftheMSflat.10. Stopthemachineandremovethepilotdrillfromthedrillchuckand

insertthetwistdrillbitinthedrillchuck11. Again calculate the cutting speed v for the hole to be drilled and

again switch ON the machine and give feed using spindle feed handleanddrillthehole.

12. StopthemachineandremovethejobfromthedrillingmachineviceandcheckthediameteroftheholeandcenterdistanceoftheholesusingGONOGOgaugeandverniercalipers.

13. Use 12 mm countersink drill bit and make countersink in the holesdrilled.

14. Clean the drilling machine table using wire brush and collect allchipsandputtheminchipcollectingbin.

15. Holdthedrilledjobrigidlyonabenchviceandcutinternalthreadsonthepreviouslydrilledholewiththehelpoftapandtapwrench.

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16. Usereamertocleantheinternalthreadsandcleantheplace.Result:ThedrillingandtappinghasbeenperformedonthegivenMSflataspergivendimensions.

Alldimensionsareinmm

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FACINGOPERATIONINALATHEEx.No.3Date:Aim: To obtain the required size of the given work piece using facingoperation.Toolsrequired: Lathe, Chuck key, Tool post spanner, Single point cuttingtool,Steelrule,Verniercaliper,Vernierheightgauge,Trysquare,Scriber.Materialrequired: MSrodoflength105mmand25mmdiameterWorkingProcedure:

1. Toolsettingusingsurfacegaugeandriserplate2. CheckthedimensionsofthegivenMSrodusingsteelruleandvernier

caliper3. Workpieceshouldnotextendfromchuckjawsbymorethanthreetimes

itsdiameter.4. Holdtheworkpieceinthethreejawchuckandtightenitusingchuck

key.5. Fixsinglepointcuttingtoolintoolpostandtightenthenutsusing

spanner/key.6. Usethecompoundhandwheeltoadvancethetipofthetooluntilitjust

touchestheendoftheworkpiece.7. Givesmallfeedsalongtheaxisofthelatheandmovethetooltowards

thecenteroftheworkpiece,untiltherequireddimensionisobtained.8. Finallycheckforthedimensionoftheworkpiecewiththediagram.

Result:ThefacingoperationisdoneonthegivenworkpieceforthespecifieddimensionusingLathe.

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All Dimensions are in mm

105

25

100

23

0.1

2.5

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STRAIGHTTURNINGANDCHAMFERINGOPERATIONINALATHEEx.No.4Date:Aim:Toobtaintherequiredshapeandsizeofthegivenworkpiecebyturningandchamferingoperationinalathe.Toolsrequired: Single point cutting tool, Steel rule, Chuck key, Verniercaliper,andToolpostspannerMaterialrequired: MSrodoflength100mmand25mmdiameterWorkingProcedure:

1. CheckthedimensionsofthegivenMSrodusingsteelruleandverniercaliper

2. Makesurethatthetumblergearleveronthebackoftheheadstockisintheneutralpositionsothattheleadscrewdoesnotrotate.

3. Workpieceshouldnotextendfromchuckjawsbymorethanthreetimesitsdiameter.

4. Holdtheworkpieceinthechuckandtightenitusingchuckkey.5. Fixsinglepointcuttingtoolintoolpostandtightenthenutsusing

spanner/key.6. Use the compound hand wheel to advance the tip of the tool until it

justtouchestheendoftheworkpiece.7. Usethecrossfeedcranktobackoffthetooluntilitisbeyondthe

diameteroftheworkpiece.drillingmachine9. Turningisdonetoreducethediameterofthejob.Sufficientdepthof

cutisgivenanditisdoneuntiltherequireddiameterofthejobisobtained.

10. Givesmalldepthofcutandmovethecarriagetowardstheheadstocktotherequiredlength.

11. Usethecrossfeedcranktobackoffthetooluntilitisbeyondthediameteroftheworkpiece.

8. Repeatsteps10and11untiltherequireddiameterisobtainedintheworkpiece.

9. Forchamferingtobedoneattheendofworkpiece,thetoolisheldat 45 to the lathe axis and it is fed against the rotating workpiece.

10. Finallycheckforthedimensionsoftheworkpiecewiththediagram.Result:Theturningandchamferingoperationaredoneonthegivenworkpiece

forthespecifieddimensionusingLathe.

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All dimensions are in mm

100

25

100 2

30.

1

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STEPTURNINGOPERATIONINALATHEEx.No.5Date:Aim:Toobtaintherequiredshapeandsizeofthegivenworkpiecebyturningandchamferingoperationinalathe.Toolsrequired: Single point cutting tool, Steel rule, Chuck key, Verniercaliper,andToolpostspannerMaterialrequired: MSrodoflength105mmand25mmdiameterWorkingProcedure:

1. CheckthedimensionsofthegivenMSrodusingsteelruleandverniercaliper

2. Workpieceshouldnotextendfromchuckjawsbymorethanthreetimesitsdiameter.

3. Holdtheworkpieceinthechuckandtightenitusingchuckkey.4. Fix single point cutting tool in tool post and tighten the square

boltsusingspanner/key.5. Use the compound hand wheel to advance the tip of the tool until it

justtouchestheendoftheworkpiece.6. Usethecrossfeedcranktobackoffthetooluntilitisbeyondthe

diameteroftheworkpiece.7. Turningisdonetoreducethediameterofthejob.Sufficientdepthof

cutisgivenanditisdoneuntiltherequireddiameter,instep,ofthejobisobtained.

8. Forchamferingtobedoneattheendofworkpiece,thetoolisheldat 45 to the lathe axis and it is fed against the rotating workpiece.

9. Finallycheckforthedimensionsoftheworkpiecewiththediagram.

Result: The step turning operations are done on given dimensions for the

specifieddimensionusingLathe.

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All dimensions are in mm

100

23

0.1

60 40 15

230.1 200.1

1 x 45

15

0.1

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MAKINGOFTEEANDELBOWJOINTSOFPVCPIPESUSINGPLUMBINGWORKEx.No.6Date:Aim:ToprepareaTeeandElbowjointsofPVCpipesusingplumbingwork.Tools required: Pipe cutter, hack saw, pipe vice, measuring tape, emery sheet,andsolventMaterialrequired:PVCTeeandElbowjoints,inchdiameterandfeetPVCpipes WorkingProcedure:

1. CheckthedimensionsofthegivenPVCpipesandPVCTee,Elbowjointsusingsteelruleandmeasuringtape.

2. CutthePVCpipestorequiredsizeusingpipecutter.3. ApplysolventononeoftheendportionofthePVCpipes.4. InsertsolventappliedportionofthePVCpipesintotheholesinthe

PVCTeejoint.5. RepeatthesametoformElbowjoint

Result:TheGIpipesarejoinedtoformTeeandElbowjoints.

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MAKINGOFTEEANDELBOWJOINTSOFGIPIPESUSINGPLUMBINGWORKEx.No.7Date:Aim:ToprepareaTeeandElbowjointsofGIpipesusingplumbingwork.Tools required:Pipecutter,hacksaw,pipevice,pipewrench,adjustablepipewrench,measuringtape,flatfile,threadcutter,TeflonTape,Shellac,thread Materialrequired: GITeeandElbowjoints,inchdiameterandfeetGIpipesWorkingProcedure:

1. CheckthedimensionsofthegivenGIpipes,GITee,Elbowjointsusingsteelruleandmeasuringtape

2. CuttheGIpipestorequiredsizeusingpipecutter.3. Holdthepipeinpipeviceandmakethethreadofrequiredsizeusing

threadcutter;applyoilduringthecuttingprocess.4. Applyshellaconthethreadedportionofthepipe.5. InsertthethreadedportionofthepipesintoTeeandtightenitusing

pipewrench.6. RepeatthesametoformElbowjoint

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Result:TheGIpipesarejoinedtoformTeeandElbowjoints.

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WorkshopPracticeII

SMBS,VITChennaiCampus

STAIRCASEWIRINGEx.No.9Date:Aim: To construct staircase wiring in which one lamp is controlled by twoswitches.Toolsrequired:Wiremanstoolkit,TesterandNoseplier Materialrequired:Bulbholder,Bulb,Twowayswitches,wires(redandblock) WorkingProcedure:

1. Markthelocationofswitchandbulbonthegivenwoodenboard.2. Marklineforwiringonthewoodenboard.3. TherequiredlengthofPVCpipecanbefixedalongthelineswithhelp

ofclips.4. Thewiresofrequiredlengthandcolourwerechosenandthewiringis

beingmadethroughthePVCpipe.5. Thebulbholderandswitchesarefixedinthecorrespondinglocation.6. Use the red colour wire for phase line to the bulb through two way

switch.7. Anotherpointofthebulbisconnectedtotheneutrallineusingblack

wire.8. Theredandblackwireterminalsareconnectedtomainswitch.9. Givethesupplytothecircuit.10. Madethebulbtoglowbyoperatingtheswitchesasgivenbelow

WorkshopPracticeII

SMBS,VITChennaiCampus

PositionofSwitchS1

PositionofSwitchS2

ConditionofLampL

1 1 ON1 2 OFF2 1 OFF2 2 ON

Result:Twowaycontrolledstaircasewiringhasbeenmadeandchecked.

WorkshopPracticeII

SMBS,VITChennaiCampus

FLUORESCENTLAMPWIRINGEx.No.10Date:Aim:TocheckandassembletheaccessoriesofafluorescentlampToolsrequired:Wiremanstoolkit,TesterandNoseplier,HanddrillingmachineMaterial required:Fluorescenttubelightfitting,twowayconnector,PVCcoppercable,Rawlplug,woodscrews,testlamp,BClampWorkingProcedure:

1. Markthelocationofswitchandtubelightonthegivenwoodenboard.2. Marklinesforwiringonthewoodenboard.3. Placewiresalongthelinesandfixthemwithhelpofclips.4. Fixtheswitchandtubelightfittingonthemarkedpositions.5. Completethewiringasperthewiringdiagram.6. Test the working of the fluorescent lamp by giving electric supplyto

thecircuit

A:FluorescentTubeB:Power(+220Volts)C:StarterD:Switch(Bimetallicthermostat)E:CapacitorF:FilamentsG:BallastResult:Wiringofafluorescentlamphasbeenmadeandtested.

WorkshopPracticeII

SMBS,VITChennaiCampus

SIMPLEHOUSEWIRINGEx.No.11Date:Aim:Topreparehousewiringwithfuse,lamp,switchandenergymeterToolsrequired:Wiremanstoolkit,TesterandNoseplier,HanddrillingmachineMaterialrequired:Switch,jointclips,bulbholder,wires,bulb,screws,ceilingroseandswitchboardWorkingProcedure:

1. Markthelocationofswitch,bulb,fuse,andenergymeteronthegivenwoodenboard.

2. Marklinesforwiringonthewoodenboard.3. Placewiresalongthelinesandfixthemwithhelpofclips.4. Fixtheswitch,fuse,lampandenergymeteronthemarkedpositions.5. Completethewiringasperthewiringdiagram.6. Testtheworkingofthelampbygivingelectricsupplytothecircuit

Result:SimpleHousewiringhasbeenmadeandtested.

WorkshopPracticeII

SMBS,VITChennaiCampus

DOVETAILJOINTEx.No.12Date:Aim:TomakeadovetailjointfromthegivenwoodenpieceasperdimensionsusingcarpentrypowertoolsTools required: Steel rule, carpentry vice, try square, circular saw, jig saw,sander,router,Planar,Mallet,markinggauge,pencilMaterialrequired:Awoodenpieceofsize(45x45x305)mmWorkingProcedure:

1. Checkthedimensionsofthegivenwoodenpieceusingsteelrule.2. Theworkpieceisfixedinthecarpentryviceandsurfacesareplaned

usingplanar.3. Checktherightangleoftheworkpieceusingtrysquare.4. Usesanderandsmoothenallthesidesoftheworkpiece.5. Cuttheworkpieceintotwohalvesusingcircularsaw.6. Makemarkingfordovetailjointonthetwopiecesusingsteelruleand

markinggauge.7. Take one half and remove unwanted portions as per drawing using jig

saw.8. Repeataboveprocedurefortheotherhalfoftheworkpiece.9. Assemblethetwopiecesandcheckforproperfittingusingmallet.10. Againcheckforaccurateshapeandsizeofthejointusingtrysquare

andsteelrule.

Result:Thedesireddovetailjointisobtainedusingcarpentrypowertools.

WorkshopPracticeII

SMBS,VITChennaiCampus

WorkshopPracticeII

SMBS,VITChennaiCampus

MORTISEANDTENONJOINTEx.No.13Date:Aim: To make a mortise and tenon joint from the given wooden piece as perdimensionsusingcarpentrypowertoolsTools required: Steel rule, carpentry vice, try square, circular saw, jig saw,sander,router,Planar,Mallet,markinggauge,pencilMaterialrequired:Awoodenpieceofsize(45x45x305)mmWorkingProcedure:

1. Checkthedimensionsofthegivenwoodenpieceusingsteelrule.2. Theworkpieceisfixedinthecarpentryviceandsurfacesareplaned

usingplanar.3. Checktherightangleoftheworkpieceusingtrysquare.4. Usesanderandsmoothenallthesidesoftheworkpiece.5. Cuttheworkpieceintotwohalvesusingcircularsaw.6. Makemarkingformortiseandtenonjointonthetwopiecesusingsteel

ruleandmarkinggauge.7. Takeonehalfandremoveunwantedportionsasperdrawingusingjigsaw.8. Repeataboveprocedurefortheotherhalfoftheworkpiece.9. Assemblethetwopiecesandcheckforproperfittingusingmallet.10. Again check for accurate shape and size of the joint using try

squareandsteelrule.

Result: Thedesiredmortiseandtenonjointisobtainedusingcarpentrypowertools.

WorkshopPracticeII

SMBS,VITChennaiCampus

WorkshopPracticeII

SMBS,VITChennaiCampus

PROFILECUTTINGEx.No.14Date:Aim:TomakeadesiredprofilefromthegivenwoodenpieceasperdimensionsusingcarpentrypowertoolsTools required: Steel rule, carpentry vice, try square, circular saw, jig saw,sander,router,Planar,Mallet,markinggauge,pencilMaterialrequired:AwoodenpieceofsizeWorkingProcedure:

1. Checkthedimensionsofthegivenwoodenpieceusingsteelrule.2. Theworkpieceisfixedinthecarpentryviceandsurfacesareplaned

usingplanar.3. Checktherightangleoftheworkpieceusingtrysquare.4. Usesanderandsmoothenallthesidesoftheworkpiece.5. Makemarkingfortheprofiletobemadeonthewoodenpieceusingsteel

ruleandpencil.6. Removeunwantedportionsasperdrawingusingjigsaw.7. Againcheckforaccurateshapeandsizeoftheprofileusingtrysquare

andsteelrule.

Result:Thegivenwoodenpieceiscutintothedesiredprofileusingcarpentrypowertools.

WorkshopPracticeII

SMBS,VITChennaiCampus