where K is the number of input variables. Therefore in the present work, 20 experiments, each in dry and cryogenic machining condition, were performed taking 6 central run from the standard statistical chart. Regression equations were developed based on experimental data. Equations for cutting force and flank wear, both in dry and cryogenic conditions, were developed. These are given below:
Fig. 1 – Schematic Diagram of the experimental set-up.
Flank wear in cryogenic cutting,
LWC = 0.2558 + 0.0662N + 0.0389f + 0.0282d + 0.0062N2
+0.0046f2+ 0.0008d2+ 0.0130Nf + 0.01Nd
+0.0066fd (1)
Flank wear in dry cutting,
LWD = 0.3693 + 0.0754N + 0.0512f + 0.0248d + 0.0028N2
+0.0118f2+ 0.0058d2+ 0.0164Nf
+0.0020Nd + 0.0056fd