28 Optimization of Welding Parameters for Self-Support …
305
Table 28.4 ANOVA table
Factor Degree of freedom Sum of squares Mean of squares P-value Contribution (%)
N
2
665,837
332,918
0.253
18.00
P
2
2,306,963
1,153,482
0.089
62.38
E
2
499,684
249,842
0.311
13.51
Error
2
225,753
112,877
6.10
Total
8
3,698,237
Table 28.5 Respond table
for S/N ratios
Level Rotational speed
(RPM)
Pin profile Joint configuration
1
−60.44
−66.12
−65.32
2
−63.77
−58.35
−61.97
3
−65.06
−64.80
−61.98
Delta 4.63
7.77
3.35
Rank
2
1
3
Fig. 28.6 The optimum welding parameters
305
Table 28.4 ANOVA table
Factor Degree of freedom Sum of squares Mean of squares P-value Contribution (%)
N
2
665,837
332,918
0.253
18.00
P
2
2,306,963
1,153,482
0.089
62.38
E
2
499,684
249,842
0.311
13.51
Error
2
225,753
112,877
6.10
Total
8
3,698,237
Table 28.5 Respond table
for S/N ratios
Level Rotational speed
(RPM)
Pin profile Joint configuration
1
−60.44
−66.12
−65.32
2
−63.77
−58.35
−61.97
3
−65.06
−64.80
−61.98
Delta 4.63
7.77
3.35
Rank
2
1
3
Fig. 28.6 The optimum welding parameters