Manufacturing Process 2 - Jun 2015

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) Explain the various elements of a single point cutting tool, with the help of a neat sketch.(8 marks) 1 (b) With the help of neat sketches, explain the different types of chips that are formed during metal cutting.(6 marks) 1 (c) The following data refer to an orthogonal cutting process. Chip thickness 0.62mm, feed 0.2mm, rake angle 15°. Calculate chip reduction coefficient and shear angle.(6 marks) 2 (a) Clearly explain the different factors that are to be considered during the selection of a cutting tool material.(12 marks) 2 (b) Explain with neat sketch measurement of tool tip temperature.(8 marks) 3 (a) With the help of a neat sketch, explain the constructional feature of a capstan lathe.(6 marks) 3 (b) With a neat sketch, explain hydraulic driving mechanism of a shaper.(8 marks) 3 (c) Sketch and explain the open and cross belt driving mechanism of a planer.(6 marks) 4 (a) Draw a neat sketch of a drill bit and explain its nomenclature.(8 marks) 4 (b) With the neat sketch, explain the working of gang drilling machine.(6 marks) 4 (c) Explain with sketches the following operations in a drilling machines.
i) Spot facing ii) Tre panning.(6 marks) 5 (a) With a neat sketch explain horizontal milling machine.(8 marks) 5 (b) Show the calculations for setting dividing head to mill 87 divisions on a shaper wheel blank by compound indexing.(6 marks) 5 (c) Sketch and explain the slab milling and gang milling operations.(6 marks) 6 (a) What do you mean by grit, grade and structure of grinding wheel?(6 marks) 6 (b) With the help of a block diagram, explain the working of a center type cylindrical grinding machine.(8 marks) 6 (c) Write a short note on selection of grinding wheel.(6 marks) 7 (a) With the help of neat sketches, discuss the working of continuous surface broaching machine.(10 marks) 7 (b) Sketch and explain the process of lapping on a lapping machine.(10 marks) 8 (a) Explain with neat sketch principle and advantages of electro chemical machining process.(10 marks) 8 (b) Explain with neat sketch principle and application of ultrasonic machining process.(10 marks)