Manufacturing Process 2 - Dec 2014

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) What are the assumptions made in Earnst-Merchant theory?(2 marks) 1 (b) Show that, $$\phi =\frac{\pi }{4}-\frac{\beta }{2}+\frac{\alpha }{2}$$, using Earnst-Merchant theory.(8 marks) 1 (c) In turning a steel rod by a given cutting tool a given machining condition under a given environment the tool life decreases from 80min to 20 minute due to increase in cutting under the same condition and environment will be 40 minutes?(6 marks) 1 (d) Explain with sketch flank wear and crater wear.(4 marks) 2 (a) Discuss about high-speed steel (HSS) and cemented carbide tool material as regard to its composition, manufacturing and application.(12 marks) 2 (b) What are the factors affecting temperature in metal cutting? Explain.(6 marks) 2 (c) List any four describe properties of cutting tool material.(2 marks) 3 (a) With a neat sketch, explain crank and slotted link mechanism in a shaper.(6 marks) 3 (b) With a neat sketch,explain the parts of turret lathe.(8 marks) 3 (c) Explain thread cutting operation in a lathe.(6 marks) 4 (a) Show the twit drill elements and drill angles using twist drill nomenclature.(6 marks) 4 (b) Explain straight cut and conditioning NC systems.(6 marks) 4 (c) Discuss about preparatory function and miscellaneous function in a manual part programming.(8 marks) 5 (a) What is indexing? Mention different methods of indexing. Briefly explain compound indexing method.(8 marks) 5 (b) Index 24 division on a work-piece using indexing.(6 marks) 5 (c) Explain any three milling operations.(6 marks) 6 (a) Explain any three grinding wheel characteristics/Parameters.(6 marks) 6 (b) Briefly explain any five bonding processes.(5 marks) 6 (c) Sketch and explain surface grinding machine(5 marks) 6 (d) Explain truing and dressing of grinding wheels.(4 marks) 7 (a) What is the principle of broaching?(2 marks) 7 (b) what are the advantages and limitations of broaching?(4 marks) 7 (c) Explain with neat sketches,lapping and super finishing process.(10 marks) 7 (d) Explain any two broaching operations(4 marks) 8 (a) What ais the need of non-traditional machining (NTM)?(4 marks) 8 (b) Explain with neat sketches :
i) Electron beam machining
ii) Laser beam machining.(16 marks)