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The project/research was financed under the project Lublin University of Technology-
Regional Excellence Initiative, funded by the Polish Ministry of Science and Higher Education
(contract no. 030/RID/2018/19).
The article presents the results of an analysis of the influence of the technological parameters
related to tool holder types on the vibrations occurring during the milling of AZ91D magnesium alloy.
Magnesium alloys are very low-density materials and, therefore, are increasingly being considered
as replacement materials for the more commonly used aluminium alloys. The tool used in the study
was a carbide end mill with TiAlN coating, clamped in three different types of tool holder: ER collet,
heat shrink, and Tendo E hydraulic. The milling tests used straight toolpaths at varied cutting speeds
and feed per tooth values. Based on the vibration displacement and acceleration signals recorded
during the machining tests, the following were analysed: maximum value, amplitude, and root
mean square (RMS) value of the vibrations. As part of the study, composite multiscale entropy
(CMSE) analysis was also performed, describing the level of disorderliness of the obtained vibration
signals. The increase in machining parameters caused an increase in the values characterising the
displacement and acceleration of the vibrations. It was noted that multiscale entropy might be an
important parameter describing the vibration signal (both displacement and acceleration).
