Non-Traditional Machining - May 2016

Mechanical Engg. (Semester 6)

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) How modern machining processes are classified?(6 marks) 1(b) What is the difference between conventional and non coventional machining processes.(5 marks) 1(c) What are the essential physical process parameters for an efficient use of modern machining process?(5 marks) 1(d) Why NTM processes are selected for manufacturing?(4 marks) 2(a) Explain with neat diagram construction and working of USM processes.(10 marks) 2(b) Explainthe following parameters with respect to USM:
i) Effect of amplitude and frequency of viabration.
ii) Effect of grain diameter.
iii) Effect of applied static load.
iv) Effect of slurry.(10 marks) 3(a) Draw schematic diagram of Abrasive Jet Machining (AJM). Explain its construction and working.(6 marks) 3(b) List and explain the varibles used in AJM.(12 marks) 3(c) List the application of water Jet machining.(2 marks) 4(a) Draw schematic sketch of electro chemical machining and explain briefly the elements of ECM process.(10 marks) 4(b) Explain with neat schematic diagram of electro chemical grinding and their advantages and application.(10 marks) 5(a) What are factors on which the selection of a resist for all in chemical machining depend?(3 marks) 5(b) Explain the elements of process (i) Maskantsor resist
ii) etchants in CHM.(8 marks) 5(c) Explain with sketch progressive stages of metal removal in chemical blanking.(6 marks) 5(d) List the application of chemical machining.(3 marks) 6(a) Draw neat diagram of EDM (Electrical Discharge Machining). Explain its construction and working.(10 marks) 6(b) Explain briefly EDM process characteristics.(10 marks) 7(a) Explain the construction and working principle of Plasma Arc Machining (PAM) with neat sketch.(8 marks) 7(b) List the general guideline for designing the torch.(6 marks) 7(c) What are the application of PAM and also mention advantages and limitations?(6 marks) 8(a) With neat sketch,explain working principle of Electron Beam Machining (EBM).(8 marks) 8(b) Draw neat sketch of a typical set up for Laser Beam Machining (LBM) and explain briefly.(8 marks) 8(c) What are the advantages and limitations of LBM?(4 marks)