OBRABOTKAMETALLOV Vol. 23 No. 3 2021 MATERIAL SCIENCE EQUIPMENT. INSTRUMENTS 5 4 3 created and its coefficient values were calculated using DataFit software. The developed mathematical models are shown in tables 4, 5, and 6 for PVD-AlTiN coated (C) tools, PVD-AlTiN coated-microblasted (CMB) tools, and MTCVD-TiCN/Al2O3 coated (MTCVD) tools, respectively. The developed models have R-squared values closer to 0.95, indicating its reliability in predicting responses based on the variation proportion in the data points during turning of SS 304 when using PVDAlTiN coated (C) tools (Eqs. 1 to 5), PVD-AlTiN coated-microblasted (CMB) tools (Eqs. 6 to 10), and MTCVD-TiCN/Al2O3 coated (MTCVD) tools (Eqs. 11 to 15). Ta b l e 4 Mathematical models for PVD-AlTiN coated (C) tool Responses Developed model R-squared value Eq. no. Tangential force (Fc) 0.195 0.426 0.652 1271.76V f d − = 0.92 (1) Feed force (Ff) 0.321 0.913 0.547 3218.41V f d − = 0.95 (2) Radial force (Fr) 0.192 0.263 0.350 121.93V f d − = 0.91 (3) Surface roughness (Ra) 0.902 0.482 0.513 620.52V f d − = 0.93 (4) Tool life (T) 0.853 0.618 0.371 231.25V f d − − − = 0.91 (5) Ta b l e 5 Mathematical models for PVD-AlTiN coated-microblasted (CMB) tool Responses Developed model R-squared value Eq. no. Tangential force (Fc) 0.559 0.821 0.980 38002.71V f d − = 0.96 (6) Feed force (Ff) 0.333 0.786 0.432 2445.18V f d − = 0.95 (7) Radial force (Fr) 0.171 0.739 0.272 369.13V f d − = 0.97 (8) Surface roughness (Ra) 0.866 0.524 0.470 543.49V f d − = 0.98 (9) Tool life (T) 0.754 0.647 0.348 141.73V f d − − − = 0.92 (10) Ta b l e 6 Mathematical models for MTCVD-TiCN/Al2O3 coated (MTCVD) tool Responses Developed model R-squared value Eq. no. Tangential force (Fc) 0.485 0.932 0.819 29772.68V f d − = 0.96 (11) Feed force (Ff) 0.093 0.874 0.463 927.66V f d − = 0.97 (12) Radial force (Fr) 0.142 0.618 0.079 250.89V f d − = 0.92 (13) Surface roughness (Ra) 0.602 0.523 0.554 153.75V f d − = 0.95 (14) Tool life (T) 0.917 0.579 0.324 551.62V f d − − − = 0.91 (15)
RkJQdWJsaXNoZXIy MTk0ODM1