Occurrence of vibration under changing spindle speed during CNC milling

Abstract

Vibrations are an inseparable effect occurring during the operation of every technical device. Especially because of this the measurement was focused on examining vibrations on the milling cutter. During the measurement the rotation speed of the milling cutter was changing as well as the two types of milling tools, with which the examined material steel 1.1213 was process, with material removal of 2.7 mm set in advance. The waveforms of technological head vibration acceleration amplitude and their frequency spectra are evaluated. Based on measured values, two graphical dependencies were created and subsequently compared with the allowed vibration value on class of the milling machines. New knowledge and conclusions are drawn based on measured results.

Cognitive Decision-making and Public Opinions

“…Table 7 shows the comparison of the average area and latency between the two groups. The smallest average area in Group 1 is the emergent situation induced condition, and its corresponding latency is also the shortest; in Group 2, the shortest latency is seen in the neutral picture induced A verage of the total score condition (Portnova, 2017;Reddy and Suseela, 2017;Feng et al, 2016;Salokyová, 2016).…”