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Reg No.: Name:

APJ ABDUL KALAM TECHNOLOGICAL UNIVERSITY
FIFTH SEMESTER B.TECH DEGREE EXAMINATION, APRIL 2018 Course
Code: ME303
Course Name: MACHINE TOOLS AND DIGITAL MANUFACTURING (IE, ME)
Max. Marks: 100 Duration: 3 Hours
Expected length of answers:
In 7-mark questions: Neat sketches and 10 to 15 sentences with exact points.
In 3-mark questions: 3 to 6 sentences with exact points, use sketches if mentioned in question.

PART A
Answer any three full questions, each carries 10 marks Marks
1 9) ^ single point cutting tool A is having tool life index 0.32 and machining (7) constant 40
and another tool B is having tool life index 0.4 and machining constant 85. Find out the speed
at which both tools are having same tool life. With help of graph explain which tool is suitable
for machining with a speed of 3 m/s.
b) Draw three views of a single point cutting tool and mark cutting angles used in (3)
tool signature.
2 2) What is meant by high efficiency range of cutting speed? With the help of graph (7) explain
how it is obtained.
b) In an orthogonal cutting, cutting force is 300 N and feed force is 120 N. If chip (3)
thickness ratio is 0.6 and rake angle is 20° find shear force.
3 a) Draw a neat sketch of carriage of a lathe and write the functions of each part. (7) b) Name
any three operations which can be carried out in lathe with tool held in (3) tailstock.

4 9) With a neat sketch, explain various operations performed in drilling machine. (7)
b) Differentiate between twist drill and straight flute drill. (3)
PART B

Answer any three full questions, each carries 10 marks

5 9) Ina shaper operated with crank and slotted link quick return mechanism, one of (7) the
strokes is taken place, when crank rotate 72°. Calculate the time to shape with one pass, over
the surface of a plate 500 x 900 mm size when the cutting speed is

10 m/min if feed is 3 mm and clearance at each end is 70mm. The cut is taken place
along 500mm side.
b) What are the differences of travelling head shaper from other shapers? (3)

6 a) Which are the different types of planer machines? Explain any TWO with its special uses. (7)

b) Write any three uses of slotter machine. (3)

7 a) Draw a plain milling cutter and mark its parts and angles. Write the functions of each part (7)
and angles.

b) Differentiate between upmilling and down milling with sketches. (3)

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