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Reg. No. Name:

APJ ABDUL KALAM TECHNOLOGICAL UNIVERSITY
FOURTH SEMESTER B.TECH DEGREE EXAMINATION, JUNE 2017

Course Code: ME 220
Course Name: MANUFACTURING TECHNOLOGY (IE, ME, MA)

Max. Marks: 100 Duration: 3 Hours

PARTA

Answer any three questions. Each question carries 10 marks.

. a. Name the purpose and significance of any three tests conducted on moulding sand.

(6)
b. Three pieces being cast have the same volume but different shapes. One is a
sphere, one a cube, and the other a cylinder with height equal to its diameter. Which

piece will solidify in the least time and which one will take the maximum time? Justify.

(4)

. a. What is directional solidification? (3)

b. With a neat sketch, explain the working of a hot chamber die casting machine. (5)

c. State the reasons for misrun and hot tear. (2)
. 2. What 15 cambering of rolls? Why is it required? (4)
b. What is draftin rolling? Obtain an expression for maximum possible draft in

terms of coefficient of friction between contact surface of rolls and work and the radius

of

the roll. (6)
. a. Explain the process of ring rolling. (5)
b. A 300 mm wide strip 25 mm thick is fed through a rolling mill with two powered

rollseach of radius = 250 mm. The work thickness is to be reduced to 22 mm in one
pass at a roll speed of 50 rev/min. The work material has a mean flow stress of
175.7MPa and the coefficient of friction between the rolls and the work is assumed to

be 0.12.Calculate the roll force and power requirement. (5) PARTB

Answer any three questions. Each question carries 10 marks.

. a. With the help of neat sketches, explain the differences between open die forging

and closed die forging? (5)
b. Describe the steps involvedin impression die forging with a sketch. (3)
c. What is the difference between fullering and swaging? (2)

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