Table 1

L9 Orthogonal array for Shock Absorber Cup.

Lower Middle Upper
BHF 08 kN 10 kN 12 kN
μ 0.05 0.10 0.15
RD 1.5 mm 2.0 mm 2.5 mm
RP 6.0 mm 7.0 mm 8.0 mm
Expt. no. Blank holding force Coefficient of friction Die profile radius Punch nose radius
1 10 0.05 1.5 6.0
2 10 0.10 2.0 7.0
3 10 0.15 2.5 8.0
4 15 0.05 2.0 8.0
5 15 0.10 1.5 6.0
6 15 0.15 1.5 7.0
7 20 0.05 2.5 7.0
8 20 0.10 1.5 8.0
9 20 0.15 2.0 6.0

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