Production Processes - 3 - May 2015
Mechanical Engineering (Semester 5)
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 any four questions:
1 (a) Explain the terms Fool proofing and swarf clearance. (5 marks)
1 (b) Write note on: Flexible manufacturing systems. (5 marks)
1 (c) Draw labeled diagram for compound die operation. (5 marks)
1 (d) Differentiate between blanking and piercing with diagram. (5 marks)
1 (e) What is HSM? Write applications and advantages of HSM. (5 marks)
1 (f) Write a note on "Diamond Pin". (5 marks)
2 (a) Find the total pressure and dimensions of die & punch sets to produce a washer of 6cm outside diameter with 2.6cm diamter hole from material 3.7mm thick, having shear strength 390 N/mm<s;up>2. Take clearance 9% of stock thickness. </s;up>(6 marks)
2 (b) Explain working of progressive die with diagram. (6 marks)
2 (c) Discuss all sheet metal operation with diagrams. (8 marks)
3 (a) A symmetrical cup work-piece as shown in figure, is to be made from cold rolled steel 1.2mm thick. Calculate the size of the blank, % reduction required, number of draws and drawing pressure. Take C=0.69, σyt=450 N/mm2.
Inside corner radius = 1.6 mm
3 (b) State and explain 'the principle of 3-2-1 location' with diagram. (6 marks)
3 (c) Write a detail note on 'Ultrasonic Machining'. (6 marks)
4 (a) Discuss in detail general arrangement of an injection mold with feeding, cooling, renner, gate and ejection system. Draw neat labelled diagram. (10 marks)
4 (b) Write note on agile manufacturing and its integration into product-process development. Give suitable example to elaborate your answer. (10 marks)
5 (a) What are various clamping principles? And also explain working of any three types of clamps in jigs and fixtures with diagram. (10 marks)
Write note on:
5 (b) (i) Angular Jig. (5 marks)
5 (b) (ii) Indexing Fixtures (5 marks)
6 (a) Locating Pins and Drill Bushes (7 marks)
6 (b) Electrochemical Machining (7 marks)
6 (c) Water Jet Machining (6 marks)