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Reg No.:_ Name:

APJ ABDUL KALAM TECHNOLOGICAL UNIVERSITY
FIFTH SEMESTER B.TECH DEGREE EXAMINATION(R&S), DECEMBER 2019

Course Code: ME303
Course Name: MACHINE TOOLS AND DIGITAL MANUFACTURING

Max. Marks: 100 Duration: 3 Hours
PARTA
Answer any three full questions, each carries 10marks. Marks

1 a) During straight turning of a 24 mm diameter steel bar at 300 rpm with था 1196 (൭)
tool a tool life of 9 min was obtained. When another bar of same material and
same dimensions was turned using the same tool at 250 rpm, the tool life
increased to 48.5 min. What would be the tool life if the speed was 280 rpm?
b) Explain different types of chips formed during metal cutting. (4)
2 93) Following data are related to an orthogonal cutting process. Chip length96mm, (10)
length of chip portion before cutting 240mm, rake angle 20°, find shear force,
and friction angle if cutting force is 2400 N and feed force is 960 N. Draw

Merchant circle diagram.

3 a) Which are the major parts of carriage of a lathe. Explain functions of each. (6)
b) Differentiate between forming and knurling operations (4)
+ What are the different types of drilling machine? explain any one with neat (10)
sketch
PART ‏تا‎
‎Answer any three full questions, each carries 10marks.
5 9) Explain the working of automatic feed mechanism in shaper with sketch (6)
b) Name different types of slotting machines. (4)
6 Name different types of planing machines. Explain any one with sketch. (10)
7 ഒ) Draw the sketch of a plain milling cutter and mark its parts, (6)
b) Differentiate between straddle milling and face milling with sketches. (4)
8 Explain indexing mechanism and simple indexing in milling. (10)

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