Modeling and Optimizing the Effects of Insert Angles on Hard Turning Performance

Table 1

Levels of input variables based on CCD of experiments.

Input parameters	Level
	−α	−1	0	+1	+α
Cutting edge angle (κr, °)	60	66	75	84	90
Rake angle (, °)	−2	−3.6	−6	−8.4	−10
IA (, °)	−2	−3.6	−6	−8.4	−10