STUPIDSID
1(a)
With neat sketch, give nomenclature of a single-point-cutting-tool.
7 M
1(b)
List various factors affecting tool life. Explain any two of them.
6 M
1(c)
In an orthogonal cutting the following observations were made:
(i) Feed = 0.25 mm/rev (ii) Chip thickness = 0.8 mm (iii) Depth of cut = 2 mm (iv) Length of chip-tool contact = 0.5 mm (v) Working rake angle = 0° (vi) Cutting force = 1800 N (vii) Axial thrust, Ft = 900 N
Determine :
The mean angle of friction on tool face. The mean shear strength of the work material The maximum frictional stress on tool face.
(i) Feed = 0.25 mm/rev (ii) Chip thickness = 0.8 mm (iii) Depth of cut = 2 mm (iv) Length of chip-tool contact = 0.5 mm (v) Working rake angle = 0° (vi) Cutting force = 1800 N (vii) Axial thrust, Ft = 900 N
Determine :
7 M
2(a)
Explain the three zones of heat generation in metal cutting.
6 M
2(b)
Briefly explain the desirable properties and purpose of cutting fluids.
8 M
2(c)
List the various methods of chip-tool interface temperature. Explain briefly tool work thermocouple method of measuring it.
6 M
3(a)
Differentiate between Capstan and Turret Lathe.
4 M
3(b)
Ecplain with a neat sketch Crank and slotted link type of Quick return mechanism of a shaper.
8 M
3(c)
Sketch planning machine and indicating major parts.
8 M
4(a)
Draw neat sketch of a radial drilling machine and indicating parts.
6 M
4(b)
Briefly explain absolute co-ordinates system and incremental co-ordinate system used in CNC.
8 M
4(c)
With simple sketch, explain the following processes: (i) Counter sinking (ii) Trepanning (iii) Reaming.
6 M
5(a)
Draw a neat sketch of horizontal milling machine and indicating parts.
8 M
5(b)
What is indexing? Name different methods of indexing. Briefly explain compound indexing method.
8 M
5(c)
Differentiate between up milling and down milling.
4 M
6(a)
Explain the factors to be considered for selection of grinding wheels.
6 M
6(b)
Briefly explain external cylindrical centreless grinding with a neat sketch. Mention the advantages of same over centre-type grinding.
8 M
6(c)
Explain the following grinding wheel parameters: (i) GRIT (ii) Grade (iii) Structure.
6 M
7(a)
Explain briefly the Honing process with a neat sketch. State its advantages and disadvantages.?
10 M
7(b)
Explain with a neat sketch the Lapping process. State its advantages and disadvantages.
10 M
8(a)
With a neat sketch, explain the electric discharge machining.
8 M
8(b)
With a schematic diagram, explain the ultrasonic machining process.
8 M
8(c)
Differentiate between non-conventional machining process and conventional machining processes.
4 M
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