Manufacturing Process 2 - Jun 2013

Mechanical Engg. (Semester 4)

TOTAL MARKS: 100
TOTAL TIME: 3 HOURS (1) Question 1 is compulsory.
(2) Attempt any four from the remaining questions.
(3) Assume data wherever required.
(4) Figures to the right indicate full marks. 1 (a) Briefly explain the different types of chips produced during metal cutting with neat sketches.(6 marks) 1 (b) In an orthogonal cutting operation, following data have been observed. Uncut chip thickness=0.127 mm; Width of cut=6.14 mm; Cutting speed=2.6 m/sec; Rake angle=20° Cutting force=589N; Thrust force=225N; Chip thickness=0.226 mm. Determine shear angle, friction angle and chip velocity.(8 marks) 1 (c) With a neat sketch, explain crater wear and flank wear.(6 marks) 2 (a) List the described properties of cutting tool materials and explain any four.(10 marks) 2 (b) List the techniques to measure tool-tip temperature and explain tool work thermocouple technique with a neat sketch.(10 marks) 3 (a) With a neat sketch, explain the constructional features of a Capstan lathe.(10 marks) 3 (b) Explain hydraulic driving mechanism of a shaper with a neat sketch.(10 marks) 4 (a) With a neat sketch, explain the constructional features of a radial drilling machine tool.(8 marks) 4 (b) With neat sketches, explain the following operations:
i) Drilling
ii) Boring
iii) Counter sinking
iv) Trepanning(8 marks) 4 (c) Write a note on CNC machines.(4 marks) 5 (a) With a neat sketch, explain the constructional features of horizontal spindle column and knee milling machine.(8 marks) 5 (b) Differentiate up milling and down milling with a neat sketch.(6 marks) 5 (c) List the methods of indexing and explain any one.(6 marks) 6 (a) Explain the types of abrasives used in grinding wheel.(4 marks) 6 (b) With a neat sketch, explain the constructional features of a centreless grinding machine.(8 marks) 6 (c) Explain the factors to be considered while selecting a grinding wheel.(8 marks) 7 (a) What are the advantages and limitations of broaching process?(8 marks) 7 (b) Explain the principle of lapping with a neat sketch.(6 marks) 7 (c) Explain the principle of honing with a neat sketch.(6 marks) 8 (a) Explain laser beam machining with a neat sketch.(10 marks) 8 (b) Explain ultrasonic machine with a neat sketch.(10 marks)