Abstract
The paper presents the quantitative and qualitative analysis of monolithic ball end mill’s instantaneous displacements generated during precise milling of inclined surfaces. The conducted experiment involves the measurements of tool’s joining part displacements with the application of laser displacement sensor and cutting forces with piezoelectric dynamometer. The milling tests were carried out for the hardened alloy 55NiCrMoV6 steel in a range of variable feed per tooth and surface inclination angle values. The obtained results can be applied for the selection of effective milling parameters allowing the improvement of machined surface finish.
Highlights
The high machined surface quality is the fundamental requirement regarding the precise ball end milling process
The literature survey shows that geometrical product’s specification (GPS) obtained after machining process is strongly affected by the cutting parameters [1], dynamical stability [2], thermal phenomena in the machining zone [3], as well as the ploughing mechanisms correlated with the minimum uncut chip thickness [4, 5]
The obtained results can contribute to the better understanding of the phenomena occurring during the GPS formation in milling process, and to the selection of effective milling parameters enabling the improvement of surface finish
Summary
The high machined surface quality is the fundamental requirement regarding the precise ball end milling process. It is usually depended on the selected milling parameters, as well as the specific machine-milling process interactions. The identification of the crucial factors influencing the tool’s instantaneous displacements during milling is important in terms of machined surface quality improvement. The similar approach has been adopted by Wojciechowski et al [12] for the on-line measurements of 6-toothed end mill’s joining part displacements during milling of hardened alloy steel. Miyaguchi et al [13] carried out the measurements of ball end mill’s instantaneous displacement with the application of capacitive gap sensor during cutting of hardened steel. The obtained results can contribute to the better understanding of the phenomena occurring during the GPS formation in milling process, and to the selection of effective milling parameters enabling the improvement of surface finish
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