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Description
The present study aims to investigate the combined influence of cutting parameters and tool holder type on the surface roughness obtained in side milling operations. The experimental study was conducted on specimens made of alloy steel 42CrMo4 QT (ISO 683-17) using a pre-designed experimental plan based on a central composite design. The investigated factors include cutting speed (Vc), radial depth of cut (ae), feed per tooth (fz), and tool holder type (ER collet, shrink-fit, hydraulic and press-fit).
The obtained results were analyzed using analysis of variance (ANOVA) and regression analysis in order to quantitatively evaluate both the main effects and the interactions between the factors. The results indicate that the influence of the tool holder type on surface roughness is not unambiguous, but strongly depends on the cutting conditions. Statistically significant interactions were observed between feed per tooth and tool holder type, as well as between radial depth of cut and tool holder type. The developed regression model enables prediction of surface roughness within the investigated parameter range and provides a basis for practical recommendations regarding the selection of tool holding systems depending on the machining conditions.