STUPIDSID
Answer any one question from Q1 and Q2
1 (a)
Explain lapping process with neat sketch.
6 M
1 (b)
A plain surface 60 mm wide and 230 mm long is to be milled on a horizontal milling machine with cutter diameter 80 mm and speed 50 m/min. Take feed per tooth is 0.11 mm and number of teeth on cutter = 12. Calculate machining cutter.
6 M
2 (a)
Draw figure of any four grinding wheel shapes used, with its names.
6 M
2 (b)
Draw and explain broach tool geometry.
6 M
Answer any one question from Q3 and Q4
3 (a)
A 250 mm diameter bar is turned at 40 rev/min. with depth of cut of 2 mm and feed of 0.3 mm/rev. Calculate Power consumption and specific cutting energy with cutting force 1500 N and Feed force 400 N.
4 M
3 (b)
Explain economics of machining in metal cutting.
4 M
4 (a)
Draw neat sketch of single point cutting tool geometry.
4 M
4 (b)
Define built up edge. With neat sketch explain formation of BUE.
4 M
Answer any one question from Q5 and Q6
5 (a)
Explain LBM process with its adv., limitations and applications.
8 M
5 (b)
Compare the ECM and USM with various process parameters.
8 M
6 (a)
Draw a Schematic diagram of 'Electro-discharge Machining' and explain its working principle and process parameters.
8 M
6 (b)
Explain AJM process with its advantages, limitations and applications.
8 M
Answer any one question from Q7 and Q8
7 (a)
Explain CNC machines with neat sketch. State its advantages and limitations.
6 M
7 (b)
Differentiate between subroutine and canned cycle.
4 M
7 (c)
Write a CNC program for manufacturing component shown in fig. From a 100 mm long cylindrical component of 80 mm dia.
6 M
8 (a)
Write short notes on the following:
i) Machining Center.
ii) Automatic tool changer (ATC)
i) Machining Center.
ii) Automatic tool changer (ATC)
8 M
8 (b)
Differentiate between absolute and incremental positioning system in CNC.
4 M
8 (c)
Explain the following codes G02, M06, G04, M09.
4 M
Answer any one question from Q9 and Q10
9 (a)
What is 3-2-1 location principle? Explain with the help of neat sketches.
6 M
9 (b)
What are the different types of jigs? Explain any one with suitable sketch.
4 M
9 (c)
Design and draw drilling jig for drilling the two 10 mm dia. holes in the component shown in fig. (a)
8 M
10 (a)
List various types of clamping devices used in jig and fixtures. Explain any one in detail.
6 M
10 (b)
Explain concept of Poka Yoke in jig and fixture.
4 M
10 (c)
Design and draw milling fixture for milling slot of 10 mm wide, 5 mm deep and 20 mm in length for the component shown in fig. (a)
8 M
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