OCTOBER 19-20, 2012 - YMCA University of Science & Technology

Proceedings of the National Conference on
Trends and Advances in Mechanical Engineering,
YMCA University of Science & Technology, Faridabad, Haryana, Oct 19-20, 2012
Three parameters are selected and three levels of each parameter is taken so that L9 orthogonal array can be
used. Surface Roughness is measured at three locations with the help of Mitutoyo Surftest and S/N ratio and
mean values are calculated by use of Minitab 15 software.
Table No. 3 Orthogonal array, L9 for experiment
Parameters
Experiment no.
1
(A)
Spindle speed
(RPM)
2
(B)
Feed Rate
(mm/rev)
3
(C)
Depth of cut
(mm)
1 2000 0.09 0.2
2 2000 0.13 0.3
3 2000 0.15 0.4
4 2500 0.09 0.3
5 2500 0.13 0.4
6 2500 0.15 0.2
7 3000 0.09 0.4
8 3000 0.13 0.2
9 3000 0.15 0.3
Table No.4 Roughness at Various Conditions
Ex. No.
(A)
Spindle
Speed
(B)
Feed
Rate
(C)
Depth of
cut
Surface roughness (Ra) at
Different location
Response Response
Response
Signal to
noise ratio
(dbi)
Mean
response
value
1 2
3
1 2000 0.09 0.2 0.547 0.548 0.558 -8.8144 0.75
2 2000 0.13 0.3 0.436 0.437 0.446 -10.2569 0.59
3 2000 0.15 0.4 0.647 0.656 0.756 -11.8813 1.26
4 2500 0.09 0.3 0 .648 0.666 0.856 -5.3317 1.84
5 2500 0.13 0.4 0.736 0.746 0.778 -7.9496 1.61
6 2500 0.15 0.2 0.237 0.263 0.273 -11.3407 0.70
7 3000 0.09 0.4 0.286 0.299 0.265 -4.2393 0.96
8 3000 0.13 0.2 0.365 0.375 0.375 -8.8571 0.77
9 3000 0.15 0.3 1.009 1.006 1.009 -9.8077 1.04
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