Production Process 2 - May 2012

Mechanical Engineering (Semester 4)

TOTAL MARKS: 80
TOTAL TIME: 3 HOURS (1) Question 1 is compulsory.
(2) Attempt any three from the remaining questions.
(3) Assume data if required.
(4) Figures to the right indicate full marks.

Answer in brief any five:-

1 (a) Principles of Jigs and Fixtures.(5 marks) 1 (b) Distinguish between orthogonal/oblique cuttings.(5 marks) 1 (c) Type of coolants.(5 marks) 1 (d) Tool signature.(5 marks) 1 (e) Application of forging and extrusions.(5 marks) 1 (f) Methods for reducing cutting force in press working.(5 marks) 2 (a) Explain the different types of Jigs.(7 marks) 2 (b) Explain merchants circle in metal cutting operation.(7 marks) 2 (c) Explain economics of metal cutting.(6 marks) 3 (a) Explain the different types of clamping and locating devices for jigs and fixtures.(7 marks) 3 (b) Explain the mechanism of clip formation in metal cutting.(7 marks) 3 (c) Explain different types of Dynamo meters.(6 marks) 4 (a) Explain the steps for designing the form tool.(6 marks) 4 (b) Explain the different types of cutting and forming dies.(8 marks) 4 (c) Explain the principle of Roll pass design.(6 marks) 5 (a) Explain the different gear shaping process.(7 marks) 5 (b) Answer in brief about scrap strip layout.(6 marks) 5 (c) Define forging & distinguish between open/closed forging processes.(6 marks) 6 (a) The symmetrical w/p shown in fig is to be made from the cold rolled steel 0.8 mm thick make necessary calculations for designing the drawing die for this part.(10 marks) 6 (b) Explain the expression for shear plane angle and co-efficient of friction in metal cutting.(6 marks) 6 (c) Explain Taylor's tool life equation.(4 marks)

Write short note on any four:-

7 (a) Full proofing in Design of Jigs & Fixtures.(5 marks) 7 (b) Cutting tool material.(5 marks) 7 (c) Forging processes.(5 marks) 7 (d) Classification of presses.(5 marks) 7 (e) Design of broach tool.(5 marks)