Optimization and Modeling of Radial Pitch Diameter Difference in Tapping of AISI H13

Table 8

Predicted values and confirmation experiment results by Taguchi method and regression equations.

Level	Exp.	Taguchi method		Prediction equation
		Pre.	Error (%)	Pre.	Error (%)
A1B1C2 (OPT.)	12.4	12.56	1.27	12.21	1.56
A2B1C3 (RAN.)	15	14.86	0.94	15.20	1.32
A1B2C2 (RAN.)	16.5	16.85	2.08	17.16	3.85