Roll No. ..........................

Total No. of Questions: 09] [Total No. of Pages: 02

B.Tech. (Sem" - 7th/8th)

NON-TRADITIONAL MACHINING

SUBJECT CODE: PE -404

Paper ID : [A0232](Note: Please fillsubject code and paper ID on OMRI

Time: 03 Hours

Instruction to Candidates:

Maximum Marks: 60

1) Section -A is Compulsory. .

2) . Attempt any J?ourquestions from Section - B.3) Attempt any Two questions from Section - C.

Section - A

Q1) (lOx2=20)

a) State the advantages ofEBM over LBM.

b) What are the various tool materials and dielectric fluids used in EDM?

c) On what principle wire-cut EDM works?

d) State engineering applications (any two) of PAM.

e) Illustratewith the help of neat sketchworking principleof electrochemicalhoning.

f) What does flexible machining system consists of? Differentiate it fromconventional machining system..

g) Discuss in brief the concept of Hybrid machining.

h) What is electrochemical debuming? How it is performed?

i) List out the equipments for PAM unit.t

j) Writethe sequenceof operationsinvolvedin chemicalmachining.

Section - B

(4 x 5 =20)

Q2) Provide an overview of Non-Traditional machining system by giving detailsof various parameters related to the processes.

Q3) What are the different types of Lasers? Explain the principle of Laser Beamrriachining with help of neat sketch. State important applications ofLBM.

M-195 {1859} P. T.O. .

Q4) Discuss the mechanism of material removtll in EDM. Also, obtain anexpression for material removal (with relaxation circuit ).

Q5) Describe the working principle of Abrasive Jet Machining (AJM). Discussthe process characteristics that influence,the rate of material removal andaccuracy in AJM.

Q6) Enlist various techniquesof HotMachining.Whattypes ofalloy'~'are generallymachined using hot machining? Explain with the help of neat sketch anyonetechnique.

Section - C

(2 x 10 =20)

Q7) Describe the working principle and major elements ofUSM with the help ofneat sketch. Discuss the effect of

(a) Amplitude and frequency ofvibration.(b) Abrasive grain size. .(c) Static load.

'Q8) Write short notes on any two:

(a) Plasma Arc Machining-equipment and applications.(b) Water jet machining.(c) Electrochemical grinding.

Q9) A component made ofIron is to be machined by ECM process. The followingdata should be assumed.

Valency of Iron = 2.Density of Iron =7.8gm/cm2.At.wt of Iron = 56gm. .

. Faraday's const = 1609 amp.minCalculate:

(a) Amount of curren~ required if the rate of metal removal is 3cm3/min.

(b) Time to drill a hole 6cm deep, if area of cross section of e'lectrode is .1sq.cm. Take curtent efficiency as 80%.

[R) IXH&HKI

M-195 2