STUPIDSID
Attempt any four:-
1 (a)
Show that in metal cutting operation \(V_c = V.r_c\)
5 M
1 (b)
Describe Radial drilling machine with neat sketch.
5 M
1 (c)
Explain orthogonal rake system.
5 M
1 (d)
Describe internal grinding machine with neat sketch.
5 M
1 (e)
Discuss cutting fluids.
5 M
2 (a)
Write a part programme using G-code and M code for machine external contour and drilling hole, at the centre as shown in figure. All dimensions are in mm
10 M
2 (b)
Derive the relationship 2?+??=π/2 in merchant's theory. Clearly stating the assumptions.
10 M
3 (a)
Explain the various steps involved in designing circular pull type broach. Draw appropriate sketches.
10 M
3 (b)
Derive expression for tool life for minimum cost criteria in metal cutting.
10 M
4 (a)
Describe carbides and ceramics as cutting tools.
10 M
4 (b)
Draw two dimensional tool dynamometer and explain it features.
5 M
4 (c)
List gear manufacturing methods explain any one in detail with neat sketch.
5 M
5 (a)
Explain with an example, graphical method of designing form tool.
10 M
5 (b)
A work-piece of 38mm diameter is being turned on a lathe with a tool having rake angle of 33° and feed of 0.15 mm/rev. The length of chip over one revolution of work-piece is 72mm. The cutting speed is 12.5 m/min the tangential force is 410 N and force is 170N
Calculate-
i) Coefficient of friction on a rake race
ii) Thickness of chip
iii) Velocity of shear
iv) Velocity of chip along the tool face.
Calculate-
i) Coefficient of friction on a rake race
ii) Thickness of chip
iii) Velocity of shear
iv) Velocity of chip along the tool face.
10 M
Write short notes on (any four)-
6 (a)
Lapping and honing
5 M
6 (b)
Dressing and truing of grinding wheel
5 M
6 (c)
Co-ordinate measuring machine
5 M
6 (d)
Nomenclature of drilling tool
5 M
6 (e)
Geometry of Milling cutter.
5 M
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