Advances in Materials Science and Engineering / 2018 / Article / Tab 6

Research Article

Taguchi Robust Design for Optimizing Surface Roughness of Turned AISI 1045 Steel Considering the Tool Nose Radius and Coolant as Noise Factors

Table 6

Regression equations at the four conditions of the L4 outer array.

Outer array combinationRegression equation

NR = 0.4Ra = 1.949 − 0.00767S − 1.181DOC + 2.34FR + 11.34DOC ∗ FR
Coolant: on
NR = 0.4Ra = 11.45 − 0.1197S − 8.36DOC + 0.44FR + 0.000373S2 + 3.17DOC2 + 0.0279S ∗ DOC + 11.87DOC ∗ FR
Coolant: off
NR = 0.8Ra = 10.63 − 0.1268S − 5.462DOC + 5.291FR + 0.000383S2 + 0.03777S ∗ DOC
Coolant: on
NR = 0.8Ra = 4.654 − 0.02079S − 3.65DOC + 6.342FR + 2.98DOC2
Coolant: off

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