STUPIDSID
Attempt any four:
1 (a)
Explain Gear hobbing process of gear manufacturing.
5 M
1 (b)
Differentiate orthogonal and oblique cutting.
5 M
1 (c)
Write short note on Tool holders and inserts
5 M
1 (d)
Discuss cutting fluids.
5 M
1 (e)
Prove that Vr=Vc.r
5 M
2 (a)
Sketch the internal round broach and write briefly on the following elements
i) Rake and relief angles
ii) Depth of cut per tooth
Width of land
i) Rake and relief angles
ii) Depth of cut per tooth
Width of land
10 M
2 (b)
Prepare the CNC part program for matching of workpiece shown in figure below for Ï•25 size bar stock.
10 M
3 (a)
Discuss the assumption made in Merchant's theory. Derive the relationship \( 2\phi + \beta = \dfrac {\pi} {2} \)
10 M
3 (b)
State various vertical machining centres. Describe any one in detail.
10 M
4 (a)
Write note on two dimensional Tool dynamometer.
5 M
4 (b)
Describe carbides and ceramic as cutting tools.
5 M
4 (c)
Derive an expression of tool life for minimum cost criteria in metal cutting.
10 M
5 (a)
A work piece of 38 mm diameter is being turned on a lathe with tool having a rake angle of 33° and period of 0.15 mm/rev. The length of chip over one revolution of workplace is 72 mm. The tangential force is 410 N and feed force is 170 N calculate:
(a) Coefficient of friction on rake force
(b) Thickness of chip
(c) Angle of shear
(d) Velocity of shear
(a) Coefficient of friction on rake force
(b) Thickness of chip
(c) Angle of shear
(d) Velocity of shear
10 M
5 (b)
Write steps for designing form tool by graphical method.
Design and draw circular form tool having.
Maximum radius = 60mm
Minimum radius = 40mm
Rake angle =10°
Relief angle = 6°.
Design and draw circular form tool having.
Maximum radius = 60mm
Minimum radius = 40mm
Rake angle =10°
Relief angle = 6°.
10 M
Write short notes on (any four):
6 (a)
Lapping and honing
5 M
6 (b)
Tool wear
5 M
6 (c)
Geometry of milling cutter
5 M
6 (d)
Cutting fluids
5 M
6 (e)
Co-ordinate measuring machine.
5 M
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