ucm anna univ question papers

Reg. No. :

c 3355

B.E./B.Tech. DEGREE EXAMINATION, NOVEMBER/DECEMBER 2008.

Sixth Semester

(Regulation 2004)

Mechanicai Engineering*un

roor * uNCoNVENTToNAL MACHINTNG pRocESSES

(Common to Production Engineering)

(Common to B.E. (Part-Time) Fifth Semester - Regulation 2005)

Time : Three hours Maximum : 100 marks

o-

7.

8.

9.

10.

Answer ALL questions.

PARTA-(10x2=20marks)

How will you compare various non-traditional machining processes?

What are the different machining characteristics with respect to which thenon-traditional machining processes can be analyzed?

What type of operations can be pdrformed in abrasive jet machining?

What are the major elenents of ultrasonic machining equiprnent? What issonotrode in ultrasonic machining?

Mention a few varieties of power supply circuits commonly used in electricaldischarge machining.

What is the principle of operation of wire-cut EDM process?

Mention a few advantages of electro-chemical machining process.

What is the basic difference between electroplating and electrochemicalmachining?

What is meant by "Population inversion between energy levels" with respect toIaser beam machining?

In plasma arc nachining, what are the two stages in which the process ofmaterial removal is affected? How does heating of work piece take place in thisnrocess?

1.

2.

PARTB-(5x16=80marks)

11. (a) ( i ) that can be considered with respect to

of various non-traditional machining(8)

(ii) Make a companson among various non-traditional machining

processes in tlrms of the following' Presentation in the form of a

table is Preferred'

What exactlY are the items

the analysis of economicsprocesses? BrieflY exPlain.

) Pocketing operatlon.

F Contouring a surface.(8)

(b)

Or

Make a comparison between tradiiionai and unconventional machining

processes in ierms of cost, application' scope, machining time' advantages

and Iimitations.

(i) With a neat schematic illustration, briefly explain the process of

water-jet machining. (12)

(ii) Mention a few applications of ultrasonic machining process' @)

Or

What is the fundamental principie of abrasive jet machining? Briefly

explain, with a neat diagram; the abrasive jet machining process'

In'abrasive water jet machining, how is material removal rate increased?

Also state how nozzle life is improved in such a machining process. (16)

(i) Discuss, in detail, the electrical discharge machining process and its

frinciple of oqeration with the help of a neat diagram' (12)

(ii) What are the significant process parameters used in the EDM

orocess? (4)

12. (a)

13. (a)

(b)

Or

(b) Explain the proci:ss of electric discharge wire cutting with respect to

processequlpment, applications, advantages anddisadvantages' (16)

14. (a) (il Draw a neat diagram and explain the principle of operation of the

electro-chemical Lachining process What are the characteristics of

electrolyte used in electro-chemical machining process? $2)

(ii) What are the factors influencing the selection of maskants in

chemical machining Process? (4)

Or

c 3355

(b) (i) What does the metal removal rate by electro-chemical grrnding

process comprise? What are the functions of abrasive particies in

such a probess? What type of materials can be ground in electro-

chemical grrnding? J2)

(ii) What is the function of etchants in chemical machining process?

What are the factors that govern their selection? (4)

15. (a) (i) With the help of a neat diagram, describe the plasma arc machining.process in detail. (12)

(ii) How will you categorize material processing by laser? (4)

Or

t (b) (il Briefly explain the dimensionless analysis to establish correlation

between Electron Beam Machining parameters. (12)

' (it What are the advantages and disadvantages of laser beam

machining? @)

c 3355

Beg. No.:

estion Paper Code: Q 2296

B.E./B.Tech. DEGREE EXAMINATION, NOVEMBER/DECEMBER 2009.

Sixth Semester

(Reprlation 2004)

Mechanical Engineering

ME 1OO1 - UNCONVENTIONAL MACHIMNG PROCESSES


(Common to B.E. (Part-Time) Fifth Semester Mechanical Engineering -Regulation 2005)

Time : Three hours. Maximum : 100 marke

Anewer ALL questions.

PART A- (10 x 2 = 20 marks)

Why is unconventional mechanical machining process not popular?

How do you minimize pulsation in water jet machining?

Why is Abrasive jet machining not recommended to machine ductile materials?

What is the influerice df dielectric contamination on the EDM?

Mention the factors influencing the choice of electrode material in EDM.

Distinguish between peel and photographie resists.

Why is surface finish obtained in CHM of alloys poor?

Mention the specific application of Electro chemical gnnding.

What do you understand by fourth state of matter ?

How is the work table protected fmm getting damaged by EBM whilemachining the work piece?

I .

2.

a

4.

b,

6.

n

8.

9.

10.

)

PARTB-(6x 16=80marks)

11. (d Explain the basis upon which modern machining are claeeified. Why theunconventioh"al machining pmcess not completely taking over theconventional machining process?

Or

Recommend a suitable machining process for (i) Cutting a glase plate intotwo piecea and (ii) Ultra precieion machining in microprocessore. Juetifyyour answer with proper explanations,

(t Diecusg in detail the principle and inlluence of process variablesupon the daterial removal in ultrasonic machining. (r2)

(it Ultrasonic machining ie used for tlrilling a hole in aluminium andcast iron under eame conditions. Which one will have higher depthdrilled? Justify.

Or

O) (l) Discuss the effects of various processmachining on accuracy and MRR.

(4)

(ii) Write a brief note on the special featuree of the equipment used in

13. (a)

water jet machining. (8)

With a neat sketch explain the principle and working of EDM. (8)

Diecues in detail' ibout the types of pulse genetators usedin EDM.

Or

Explain the working pdnciple, elementswire EDM.

o)

12. (a)

parambtere of abrasive jet(8)

(8)

(r)

(D

and characteristics of(8)

(b) (t

(ii)

14. (a) (t

(ii)

E:<plain how the stratifred wire works. Also diecues about the recentdevelopments in wire DDM. (8)

Discuss the effect of high temperature and pressure of electrolyteon ECM process. (4)

Briefly discues about Electro chemical Deburring process' (12)

Or

q 22e6

(r) Explain in detail the principle involved in chemical machining(p)

(ii)Discusebrieflyaboutthevariousparametersofchemicalmachining' process that inlluence th€ pffformance of th€ machininS' (8)

16.(a)Explainthepr inciple,conetruct ionandworkingofelectronbeammachining. Also how a complex shape can be cut using EBIVI process?

O) (r)

' (ii)

Or

laser beam machining. . (10)

Write a brief note on underwater plasma arc cutting system' (6)

IQ 2290

7

t '

\

1\\\ l

Reg. No. :

r/

2.

(_y

l-4t '

io. jL./

6.

R 3433B.E.lB.Tech. DEGREE EXAMINATION, NOVEMBEWDECEMBER 2007.

Sixth Semester

(Regulation 2004)



t nae 1001-UNCoNvENTIoNALMAcHININGpRocESSES

(Common to B.E (Part-Time) Fifth Semester Regulation 2005)



PART A - (10 x.2 = 20 marks)

Give some advantages of modern machining processes.

List the major parts of ultrasonic machines.

What is the function of Nozzled in water jet machining?

Name some conmonly used abrasive slurries.

Define flushing in Electric Discharge Machining.

What are the electrical parameters which affect the metal removal rate inEDM?

What are the functions of electro\rtes in ECM?7.

^\8) What do you mean by Maskants in Chemical Machining?

9. Give the two major classifications of Electron Beam MachininC @BM).

10. What does The Word LASER stand for?

I

11. (a)

t!.

,,,: . \| (r)

(ii)


Briefly explain the overwiew of the non traditional machimngprocesses.

Why this machining is essential for the industries?

Or

(b/ D"r* a sketch of the general arrangement ofan ultrasonic machine andexplain the principle of operation. (16)

72. (a) Briefly explain the following rnachining parameters and how they are

- affecting the machining performance of USM. (16)

(i) Frequencyofvibration

(ii) Grain diameter

(iii) Applied static load

(iv) Slurry, tool and work material.

(10 + 6)

Or

with a sketch and discuss its advantages(16)

(16)

(b/ Explain in detail about AJMand disadvantages.

13. ("/ Explain the working principle of Electric Discharge Machining with

sketch and list its appliiations.

Or

Sketch and explain the Electrode feed control mechanism of EDM.(10)

Discuss the factors to be considered for selection of electrode

materials. (6)

l , '_14. [a) I Explain the process of Electro Chemical Grinding(ECG) with a sketch*'- and list its applications and advantages. (10 +6)

Or

(b) Explain the principle and process of ECM with sketch and describe thechemical reaction that takes place in this process. (10 + 6)

(i)

(it

(b)

R 3433

1.

2.

a

s 491

B.E./B.Tech. DEGREE EXAMINATION. APRILA{AY 2005.

Seventh Semester


ME 054 - UNCONVENTIONAL MACHINING PROCESSES

Time : Three hours 100 marks



List the cipplications of EDM.

What is the transfer nedium in AJM?

What is the effect of abrasive grain size on machining rate in USM?

11. ( i)


Explain the principle of working of wire cut EDM process with a sketch.

4. Name any two electrolytes used in ECM.

5. Indicate the range ofpulse duration and current in EDM.

6. What are the materials used for toolS in Electro Chemical Machining?

7 . What are the process parameters of Electro Chemical Machining?

8. What is the acronym of LASER?

9. List any two gases used in plasma arc machining.

10. Why is the deflection coil provided for electron beam machining?

(10)

(6)(ii) What are the advantages ad disadvantages of the EDM process.

15. (a) (i) Briefly explain the various parameters that govern the performance

of pAM. (10)

(ii) Discuss the general guidelines for designing the plasma torches

inPAM. (6)

Or

(b) Explain the construction and rfforking principle of EBM with neat sketch'

List its advantages and limitations. (10 + 6)

R 3433

L

t2. (a) Explain the working principle of electrochemical discharge gnndinq an!

discuss the process capabiliiies. (10 + 6)

Or

(b) Explain the ECM process. Explain how a replica of the tool is obtained.(10 + 6)

13. (a) (i) Explain any one method of producing laser'

(ii) Write the thermal effects of plasma arc machining process'

(iii) What are the applications of EBM process?

(6)

(6)

(4)

Or

(b) Explain the features of EBM unit. Explain the*

accelerating potential on naterial removal rate'effect of increasing the

(10 + 6)

List the tool( I2 + 4)

(16)

14. (a) Explain the functions of transducer and horns used in USM'

materials used.

Or

(b) Discuss the process parameters in waterjet machining process'

(b)

(a)

Or

Briefly explain the effect of operating paraneters on material removal

rate. iist ihe applications of USM' 02 + 4)

Explain the principle of working of the AJM process with its advantages

.ni disadtruotag"". (16)

s 491

\\

A 389 zql 'z-l "s-L.

t -:- ..:.:-t

B.E./B.Tech. DEGREE EXAMINATION, NOVEMBEWDECEMBER 2005'

Seventh Semester


ME 054 -UNCONVENTIONAI, MACHINING PROCESSES

Time : Three hor:rs Maximum : 100 marks



1. What is the necessity for unconventional nachining processes?

2. How non-traditional machining processes are classified?

3. List recent developments in EDM process'

4. What are the properties required for dielectric fluid for EDM?

5. List few commonly used ECM electrolytes'

6. State the limitations of ECM.

7 . What is the PrinciPle of LBM?

8. What is the purpose of vacuum'chamber in EBM process?

10. What is the PrinciPle of WJM?


11. (i) Describe the process of Electrochemical machining' (8)

(ii) Discuss about Electrochemical Honing and Electrochemical Grinding.(4+4)

12. (a) Explain the process of Electrical Discharge machining' its process

parameters and applications' (8 + 5 + 3)

Or

(b) Describe the Wire cut EDM equipment, its working, applications and

advantages. (6+5+3+2)

13. (a) Explain the process of LBM and pAM with a neat sketches.

(b) (i)

(ii) Give a note on the various types of transd.ucers.

With a neat sketch explain the process of AJM. List itslimitations .

(8+8)

15. (a)

Or

(b) (i) Discuss the process parameters of EBM and their inlluence onMachining euality. (8)

(ii) Explain the process capabilities of EBM and pAM. (g)

14' (a) Explain the usM machine setup and discuss various feed mechanisns.

(10 + 6)

Or

Discuss the influence process parameters and applications of USM.(5+5)

(6)

applications and(8+8)

(b) (i)

Or

Explain the process parameters that inlluence AJM.applications and limitations of WJM.

(it Briefly discuss the application and limitation of WJM.

List the(6+4)

(6)

A 389

-_- '

c 3287

B.E.lB.Tech. DEGREE EXAMINATION, MAY/ruNE 2007.

Sixth Semester

ME 1OO1 - UNCON\,'E}TTIONAL MACHINING PROCESSES

(Common to BE (Part-Time) Fifth Semester Regulation 2005)

(Common to Mecha''ical Engineeringr{Production Engineering)

(Regulation 2004)



PARTA- (10 x 2 = 20 marks)

,/t: Distinguish traditional and nontraditional machining processes?

2. What are the applications of WJM?

3.) State the working principle of USM.

4. List the process capabilities ofEDM process.

5. What are the types of tool materials used in EDM?

6. List the ECM electrolytes

7 . State the limitations of ECM.

8. What are the advantages of Chemical Machining?

i.9. How EBM is different from PAM?

10. Distinguish vacuum and non vacuum EBM process?


11. (a) Explain the reasons for the development of Unconventional MachiningProcess. Discuss about the criteria recommended in selection of theseDrocesses. (g + g)

Or

(b) With a neat sketch explain the process of AJM? Explain the processcontrol measures to be taken to control quality and MRR. (8 + 8)

I

IK1297

B.E.lB.Tech. DEGREE EXAMINATION, NOVEMBER/DECEMBER 2004.

Seventh Semester


ME 054 - UNCONVENTIONAL MACHINING PROCESSES




What are the characteristics of Unconventional Machining Process?

2. List the unconventional machining process, which uses mechanical energy. \

What is the purpose of dielectrig in EDM? "/

4. Write the principle of Electrochemical Machining. I

5. What are the limitations of EBM?

What do you mean by transferable arc in Plasma Machining? What is its use? .)

Write the typical applications of Ultrasonic Machining. , ,

What are the types of work materials for USM?

What are the desirable properties of carrier gas in AJM?

List the unique benefits offered by AWJ. r.

7.

o

10.

L2. (a) With a neat sketch explain the process

control of quality in machining in USM'of WJM? Discuss about the

(8+8)

G)i

13. (a) r

(b)

15. (a)

Compare the USM,limitations.

Or

WJM and AJM in terms of Process capabilities and(16)

Describe the wire cut EDM process with neat sketch' List the advantages

"r.d ti*lt.tioo" of wire cut EDM

(8 + 8)

Or

Explain the working principle of EDM with a neat sketch' (8)

List the recent developments in EDM process and state the

Iimitations of EDM Process. G + 4)

14. (a) *

Explain the process of Electrical Chemical machining lvith neat sketch

and discuss about inlluences of process parameters in machining output'(8+8)

Or

Describe the ECH and ECG equipment with neat sketches and list their

applications and advantages' (10 + 6)

Discuss about the process parameters of LBM and PAM *U n" *d"l;;

in Machining QualitY.

Or

(b) Discuss about the process capabilities of EBM and the process

p-"-"t"* "f

EBM i" jtt;;;;ng ivlachining Quality' (8 + 8)

trol(ii)

(b)

ca2a7

15. (a) (i)

(ii)

(b) (i)

(ii)

Describe the principle and equipment for Abrasive Jet Machining.(e)

Explain the process parameters which controls the AJM machining

Quality.

Describe the principle and Equipment for Water Jet Machining. (9)

Explain the different applications and Process control features of

Water Jet Machining. (3+4)

I(1297

/


11. Compare the mechanical and electrical energy processes in terms of physical

parameters, shape capabilities, Process capability, and Process economy.

(4x4=16)

12. (a) Explain the process of Wire cut EDM and list its advantages. (10 + 6)

Or

Describe the principle of ECG and ECH? Discuss about the Processparameters that inlluences the ECM. (5 + 5 + 6)

13. (a) Describe the Laser beam Machining Equipment and Electron BeamMachining equipment. (8 + 8)

Or

(b)

(b) Explain the principle of Plasma Arc Machining. Compare Plasma Arc

Machining with Gas cutting. Discuss about PAM process parameters.

(8+4+4)

Explain the principle of ultrasonic machining and its equipment. Explain

the factors, which influbnce the metal removal rate in ultrasonic

machining. Compare ultrasonic machining with traditional abrasive

machining. (8+5+3)

74. (a)

Or

(b) Explain the following in detail :

(i) Tlpes of Tlansducers for USM.

(ii) Feed Mechanisms in USM.

(iiil USM Tlrpical Applications.

(iv) Abrasives for USM.

(4)

(4)

(4)

(4)

K1297

between(8)

(4)

(12)

B76GI7ZE26. (a) Bring out .tl"

differences

l"'""""ii""ur F"di"g and ECG'

(b) How to select tools for ECG?

T]NIT V

29. ComPare EBM and LBM'

Or


Maximum : 100 marrs

gr.ven lo

OCTOBER2001

Time : Three hours

UNIT TV

27 . (a) With a neat sketch explain an wire cut EDM '

n""*tl "."J i"r contour cutting'

(b) How to s?rt the cutting in wire cut EDM?

Illustrate with sketches'

28. (a) Draw the oc curve for a RC circuit in EDM' u,

(b) How does this system has changed it-:-Tf,o'

"tug"it it'" current type ofIC based control sYstemr,u,

Answer ALL the questions in Part I'Td -" ^-rVg i*"ii""t l" Part i) choosing ONE full questlon

from each Unit'

What are the other n€mes

rl machining Processes '

What is meant by abrasive flow machining?

What is the role of abrasives in AJM process?

30. (a) Horv to cut plastic material using PAM? (f

(b) Compare plasma cutting with eas cutti5

process.

4

n What are the parameters to be considered,in toot

i " r ie" i ' 'BCnz i* ' : . * , \ ' - r , ' ) . , , ' i ' , i L, , , . ' \n.

"

"o, out the mJs"d"-"*" Inh "ppril'Lt\oh"

of

B76Gl7zE

"lfO. What are the requirements of ilielectric medium

f noour

"l ,r. '"!Vater is used as a dielectric meilium in wire cut

I nOtVt'Z JustifY the statement'/\ ' ' " ' surfaces in EDM Process?i tZ. How to cut rnclrneo surr'rues

)

h - -^ " 'tance in EDM Process'ft ra. Defrne stand on orsl\-l l

\* what is the principle of ED grinding?

L-

15. What is the function of focussing and cleflecting

coils in EBM?

q 16. Differentiate betvreen spontaneous emission and

stimulatecl emission'

l7 . Name the. { sources tleveloping thermal energy in

PAM' V\Y'+" "/ *iu

18' Why Xeonon lamp is used in LBM as a source?

19. Is it possible to carry out hidden welding usi'^''

LB? JustifY',

20. List out 5 Iatest processes baseil on

""l"-tiJnt*J machining used in tool room'

'PART B - (5 x 12 = 60 marks)

T]NIT I

21. (a) With a .neat sketch explain the concePt

,ofAJM used for castrngs'

(b) List out the merits' demerits ancl andicatio,l;

22. (a) Compare the conventionul 66ghines with

L"""J""ti""i machini.''g processes' (o,

(b) Briefly explain the history of non-traditional

machining Processes'I]NIT II

23. Derive qn expression for the MRR in USM with

suitable assumPtrons 'Or

24. (a) With a neat sketch explain the concept of US

used for drilling oPeratron'

(b) What type of materials are best suited for

J*t

USM? WhY?

)

il"""3.JTi.if 1"fr^:-"i"H::1"":ff li'f "^;.17-drrectlY

ProPortional to curr

I'NIT III

Or

3B76GI7ZF,

B76Gn7'El

Mec 6.28 (7th Sem)

i 'Il4ADRAS UNIVERSITY '.

B.E. DEGREE EXAMINATIO]I,'OCTOBER 2()OO

Seventh Semestei


EIECIiVC.II : NON TiTADITIONAL MACHINING TECHMqUES

Tinle:Tluee hours Maiinrum: i00 ntarks

i'APJ A - (10 x 2 = 40 marks )

Answer A!- questions

Give brief ans*ers and neat sketches' if necessary

L For machining of elecirically l}on corrilucting tllateriali; both - and

- !,rocess are trnsuitable

2. \4i[tion foLrr non_traditionai machining techniques which are havrng

lrrgh -'r VRR.

i."*nu, oo ro" understand by the term stand 6ff distance (soD)? -

.1. AJll is recotrnendecl for the processing of.- naterials such as

Mec 6.29 (7th Sem)

'X Iq. What rre rhe basic ur ls of EBM machrnel' zu. \ytral are the advantages of LBM process?

PARTB_(5/12=6Cnrark)Answer FIVE quesions choosing ONE from etch Urrit.

2t Explain re meih"a "reuiir.ffJrrlning witt trreSetpof a schematicdiagram. Discuss the parameters ihat atre; ,fr" al",.,,r"olnf'n.;r.""V

altd surface finish. .

OrJ2. rn) l i51 su1 rhe appl icat ions ofabrasivejel nnclr i l r r ig

(b) Expiain the need of non,traditional nuchinirg telhr,iques.. IINIT II

J3 ra 1 F,6p1";n any two elements ofprocess of USI\1.{ b ) \Vth neat sketches erpjain the uriking principle of US\ I

Or2l.ia) E-\plain the tool feedinechanisrn of USM $iih D?at sketch.' (b) Discuss the effeqt of

(i) Atrrplitude and &equency ofvibration(ii) Grain size.

on MRR i,n USM process:

UNI!. IIi1.5 (dr How is deep hole drilUng done in ECM process?

(b) Explain electro chemical milling process.

.F

25.(a) Describe, with a neatmachining.

Orsketch the' process of Electrochernical

, (b) Mlat are the functions of electrolytL in ECN1? List the commonclectrol,' les used in ECM.

i

I

i

i l

:,1

'r

i

sa

:1i

: l

:

;

I

/V (b) Sketcli the cun.es for the follorving paranet€s.

). Whal.dd you understand by non-traditioniil machining tEchniques'/2. Holv to classi& the urconvelrlional machiaing process b:isedoir enerE)'transfer? I ,3. Whar are the requirenents of carrier gases in AJM process?4. Lisfout the disadventages of AJ\4.process'l5. What is meant ty transducer used in USM?6. How to select tl. re couplants for the ilSM? ,

7. What are the.process pammeters to be considered is US welding?

(i) Spark gap versos lvtRR(ii) Resistance lersus \'lRP.(iii) Mean crrrreut lersus MRR. ,

Or ' '

28.(a) Dra} a neat skefch rboul the ElecfricalrrHulr i r rc.. (tr) V'rite shoft rotes or '1'r:;ol Elecfrocle tr,ear in EDM.

(c) GiIe four appiicatiolls ol'EDM proccss \\iLh sketch.. LN.{IT V

29. (a) E*plain the \yorking of tire Trrllferrcd ard Non-Transferrccl rrctlpe plasnia arc machiniug nachine. (3)

(b) Wrile nbout thc properties of thc g:rs used jn the FAM proccss. (-l)Or

30. LisJ. out the appiicrtioirs ol EBM and LBN{. (12)

.3+.3

MADR{S UNIVEITSITYB.E, DEGREE EXA}'INATICN, APRIL 2OOfI.

Seyenth. Semester

l r f rchr,r ical Engirrser i l ;g .Et€crivc - NO|{-TRADII'IONAL MACfIINING TECIINIQ UES

Timc :Tlrree hours , 3 lvlaxinrum : 100 ll inlks'PART A - ( 20. x 2 = +0 narks)

. Ansrlcr ALL qrreslions of Part A rnd FIVE queslions ofPart B.. choosing ONE fronl eiich Unit.

tvIEC 6.l7 (Tth Sen)

Qischargc Grindi4s(+)(4)

(1)

' '

t , ; '

. , ; . . t . .1

I . MEC 6.18 (7rh Senr\ ' .

l l #l:i::::ill':""0n'' " u"0 'n ;,;;*,.. .i'

y. whai ale dte requ irements,of elr-t In rthrr ,,;^...,^^, ,

ledrolytss used in EcM?, t

l l . iii tiJlffi::;:il,1#1.J;fffi:il'il:J# i;sc^a,i ,. . ' :i.' j

r#**tl*;x;:*hli;lff;', i*i' ' ir"i,I .;j.::!t'uT," !"trvecn sprrk and rrc? ' .i $ii ,'Ji]l,.liilT,i:rr)0scs

of di clecrric nredruin usecl in EDr\r.r i,

:;"1lli;'#,:ilff.i1;":":flJl'Ji* *n'*,,o"a,siindins o;o -"

*"ilir.*t't "or slbjcclea 11an, wcc:'". Jusu.s rhe srare;ent rn ECM .,l,,ii,

\ ajusring it/

" 'l: \!t'rriq wx ulst:uce) rn EDM,ard the mgdrod of i,, .,i, ' l7 Distingxish betrrcen sponir

) ii il.l.jlii""1pl:y: ;X".::1iH'r?ffii;rimurated e,nission, i l, .j1\ ; ,11j . , : " , rhenrQrirsr"oo." i . . , - , i l *o i io.r 'w: ty!

. ' t i i' ' , 'Jv, :n| Iq[ i ]b5comn]ol I I } t tsecl ] . tscrnt l lcr ia|s '

- . . , fARTB-(5 x, =*,r"r l l : l , ' , . ,

; "li": ncrr rabutar .o,u,,,nffilr* rhc diflerenl 0o, traJiriorLat . , "nrchrnjng procc.\ibased on 5 diffe,renr paramclcrs?

. -.__,rr(rlAr

.

.

.

",t]in*::H:,,',:Jfj#iJ:ilnventibnarrlachininspiocesses?' ii,'

i.

'rs plncrplc.. .v

fllachini ng ."i-or nretal renroval? Fxplaii 11 ,. .ft : ' l )

LTNIT IIr.J fldl'! to use IJS nachinirrg fo : ,.sricich. . ,

r,{rilling operaiion I Eiplain *irtl u i.at ,. : l- . - - :

ji )l^l:.:" :,:- is_i n,po,anr,,, ;;._:;,';;;;'\ileq

rn bDNl'r

:;1":::: ::,0.n"., oD (stnndofiDista,l.e;,ns;M.n6themeil,^,r^r

ir l

^ ; - - Orz+ jJratr-a neal skctch fol US rr.cldiirg. I, i ',-^-

Or

it;,?'11,i,11,".'' tkcrclr r"r us rrcldi'g urplain tJre funcriorr of eaqh pan ,

^x ral erincr;qr*" o,uu.*"SJl,JJ,J!n conoo,,,;;)"r--r,..,-1. ,. , llld, t'eleclr rocherni cai

, (b) "111n1 is ",

UT

l

: sEC 6.15 (?th Sen)

:; .N{ADR {s UNIvERSITY'"lli B.E. DECiF-EE EXAMINATION''OCTOBER 1999'

'.i.i Scventh semester1i

i l Mcciranical Engincering

ij l:l"rtl. '" - N0i\{-'IRADITTONA! MAcflIN ING TECHNIQUES -;, finie : Threc hours Masimun : 100 marisr ' , PART A-( 20:t2 =r10 msrks)

:, - Anrltc, ALL qtrcsliols cfPart A and FI\E questions ofPaI1 B

i chccsing ONE front each Unrt.

.t .i. Wlli.f., f".on - Traditional Nlachining Technique consrmen mole po\\er: , . ' , , ,p, ' , "u lo t l tc o l l r . ' : proc(ssci

, l) tvliichNcu Tradirional nlachining techniqrle employs the mechanisnl

. oi ptasri" shear aLtd ion displacq ent ior nuteri:tl rcmoYll?: i. D,.'iail thc eltct of rlrixing riltio on the lnzlerial reno\'al rate in the

(rsc of , \J1l..i .r. Skctcf, tire TrcrLd of E-rti usiott Pressttre t'ersus nlateriiil rc ol'31 r31e

'l c,rn,e in ihe case of Ab'rasile florv macl-iirring

, Sl Wt{ot is eani b}- rlagr}ctostriction eft'ect'?

'l 6. what is the use o[ the irltrxsorlic generatol $'hich 'us |sed in t he US]ri

jlrcitss.:i 7. SLctch the cun'c Hardncss t0tioversusNRR inthc caseofUSM process ;

:l ti- what tl'pe of nratcrials canbc rvelded by ultrasonic \'\elding process'

,i 9. Listatieast [o';r propcnies of the slectroh'te used in Eclvl Process'

..1 to. rvhat ate thq ljnitatiolls ofECMprocess'/

-l i 1. SkeLch tire schenatic diagrain of a Electrochelnical Grinding proccss-{-

tz.fVt,o, are the djfferencls bet\rcen Electrochcirical grinrling and --

li

. E i ! 'c l Io( lr . l l t i i i : i t t isclr ' rrgc grinding'ti ti. iVl,rt is the rulc'ofdicr.'ctric flrrid u:ed in tlre crse ofEDM Pioce6s?

. '*-- i+. St"t.tl the Trcrld of tlre capaciiance'versus MRR cuwelfor the EDl!-{

i pro.rr.* i:.ffot" do $'e lchie\:e tle tnovemeqt of tlte $orkpiece or rhe rvire ic cut:i

in the case 6f rvire iut EDM?! ilong the caPiPle\ Proliie? I6. Nlnc ttto :1,piicatiorrs of Elccricrl discharge grinding '

!'X f l. rfo* do :iou accelerate ihe v'elocity of the elecrorrs entilted fron the

! clectron gun? - " '

NtEC 6. l6 (7r j r Senr)\' {S. Wl12; i5l 12psferred and non_lrrnsferred arc rype. phsnta arc muchirrirrgsl,item?

] l _: , tuo adr ntrrgcs oFplrsnn arc rnachininB I)roccss.

wtu i ' l l- t$o errntpies for C.:s Lasers. i . . r .

PART F - i ) \ l l2 l= bi t Inarks)

i

II1

i!

21 (rr) Cive a detailed classification of rhe Non_Trrilitiglal Mircljrrrrgte.lrtiqrles b:sej on the 4'pe of energl ,uechrnisrn of ,nrr"'iri'r.,r,'ourl,'j e+lv tmnsfer media and cnergv sourcc. ., .(;)

(t) List out the applications ofAbrasirc Flor.v nrachi,ring pro..r..,uitf,rrcr. -ketchcs. (6)

Or22 D'..al abour the

'arious process paranlcters ll l.t i lrc co*eccd 1!rth. i l , r l 1t .1", Ma: l i r r r in i proccss.

, ; ; ; - '

INIT Ii

],r.-Fir llrrrl in (l*ail aboLt the princ;pJe, l.orkiug and ntcch:nisn ot,miterr:rl rdrnor.'al in the cabc of USM pro.ess ,lon! .,rirf., it, a,flnn-t1",3rd diiadvantages.

. '] . ' or

.(12) '

2+. \tr'iilr a neat sketch explitin the $,orkxrg$elciil lg prcccss alorrg ri.Ih its disadvantages..

.. TINIT III25. r,tr'riie shon nore- oi.the follorving $,ith refercnce.to ECM proccss:'

-(d)-Elcctrodes used in rhe process ; ii Z;

-

(b) t:i("iJol-\1c(c) lbol feed mcchrnism(d) lbol design

principlc of an rrltrasonic

. (12)

cf a Eiectrochenical dischargsr i t \

I.. N.{EC -' 6 ,'1 (?tir ijem) l

,\l,r D t{-{s uNI}',tRSl'11

B.E. DEGI1EE EXAMII'-IAIIONS,:OCl'OBER 1 997'

Niecir:inical Engittcering Brinch

N1E(l - 5.4"(71h Scnt

a-\.

j , . , " . t .1,1 t r . : . l . t r . r r ; , , | ]5 ;_\ i , .s of too] l io j r lcrs rrr : r i t r : lsc l i r icrs usd I l r .I ulriA_sal1c l lachiair:g,l E:rplain them.} ,U NIT.III

1, , . : : ,1 11' , ' rs l lL i i r . . .d t 'or i ln L, lectrc i \ te in Lj lcctr ochcr;r ical nracjr in jne?al ' ' - l r : iJ i : : . t i : - r ' : : . . r : r , . , - .^- . , , .^ , ̂ . , . . , , " - 11 """ ' """" .

I -_ _. ,..,v,.r r..!...rr.r t i lr l t l l 'cci thc si:rlxcc fir)jsjr in ECl,{.i . -: \JI

' : : ^l l l

t ' t t thL'l 'opclties irn c['.Lroi1e r:scr] in 6cr,f piocess should

:r , . . . ' : ]

t ""p"c cc; t tcn- i ' iu i ' r l ' ' r i : rL i ing' , , tc " lcc,ro,- ; , "u, jcal

gr indir tg: ,

:1.

j

Seventh Sencster

.iJ - Eleclive : NON - 'I'RADITIONAL FIAC-HTNING 'IECIIIiIQUES

TiNe : Three hoursPARTA(20i2=40marks)

r\lrs1ler Al-L li l lcshons

LNdme ihe ilcoN,enlional nr:rchining proccsscs lbr $ hchtbcmtal

. cIrc4,g is used for nllttcri:rl tenroval'

z. List arr1 tlvo disadvantags of;\brisive Jit lvlariril itg

'i. Lisr any folr process prrlolelcrs ofUSN{'

'1.' Wht is ( he triost colnnloni.v u sec'i ii udi ill th slu rr-':in !-Sl'1 1

;. t ;;t"1,* rypiarl apllicatiorls ofrravclling rvireEPII{." - -. -.

g. fifr"t "

tttc t asic aiffc'e"te it the opcrating plilciple of Et-'\:! anC

i- l* Ut*, tlrc tool r'ibratci at a ii'qucl)c)' jn thc range crf --

8. 'fhe residuai slress in a surlace macltined by EClvf ts --t-.:

;. ;i;;;"*;.o'n of nol using xater as a dielci tdc inEDN{is --

10. EDN{ cantlct be used for machining:--- materiirl

'-. i1. ttlg gsll process is to be coltducled in r.acuurl bccause --

)'.12. In pl2snairc ir'{achining' thetool is-_ -=- l- 'r

. \ i l . LASER sr:rr , l ; tc , , - - - - -

. t4. Co2,las. 5):s1elr uscs --- gases " i

ir. ,n l,Cno, for iror based allo,!'s' dle elecutl-i1c xsed is --r ' '

State True of False:

15. ECM cah be tisetl for machining ccnmics and- plastics'

.. 1?. Fine iroles can be rnachined by EBM -:: ''r ''re

' 18. Spark erosicir machinrng "ao

b" used for the macllining of bolil

conciucting an<l non{onducting tnatetills , ,,. -,.' 19. In gCll, tt,e ri ' ' 'r[ 'picce rnd tl 'c iocl clecl;oJc:'l: sr{5nlergefl r' i II

I UN]T IV

1'- j , l l ! - i ] l '1" t i r ' : Lr ;rs ic pt i ; r I lq 6i tDt\ t $ irh a rcar skerch'

. r t : . / . : : l i l i l l ' l l l , . j1:U: t )crr ic tnt lucrrcc oa ntctJ l renloval ra le aIc; : ' i , f .1:r F, . js l r r i r LDi\ t . -o. \ ,qs

iCr

i " .J l . )u] l : ,3rc l i rc uirs ic , . 'quir ." , .nr, otan ider l d ictcrr ic f lu jd?

i_ (b)' \,,trn a eat sl{elch, ,erplain rhc clccrricaj dis.,,r* "U."

*u*,froces.[, L Nlr 1,/.jr. ,i l) \\,i,11 a reil sketch, ,..rplajn the working of an electron beanr';'rchinin6 set ip Lisr a feu ,rplicatrorrs of EBM.

i (oJ uritrn$lish behre3n electron beani aid plasma arc. ,

* orp. 3) E:qrlain 1ew laser bean nrnchinir,g.;s carricd outrI (D) wiiat tYpe of nrrrierials carr be successfirlly nuchi cd by pAiV.r

electroYtic solution'X io. 'fnna ito proces:s suilable for nricronaqhinilS' '' \'t

PAMB - (5'^ 12 = 60 nlarks). . IrNIT r

21- (a) Compare non-t"ditionul *nchining prcccsses with tr:atlitior''al

ucm anna univ question papers

Documents