Dynamics of thin-walled element milling expressed by recurrence analysis

Abstract

This paper presents the results of experimental research on the stability of a milling process for producing a thin-walled part made of AL7075 aluminium alloy. The part was machined on a CNC milling machine with a decreasing wall thickness. The acceleration and cutting forces in the process were measured and analyzed to determine stability limit using classical stability diagrams as well as recurrence plots and recurrence quantification analysis.

Vibration of middle ear with shape memory prosthesis - Experimental and numerical study

“…A further analysis is performed using the recurrence plots (RP) which can be applied to any linear or a nonlinear systems and not stationary signals as well [18,19,20,21,22,23,24]. The description of the RP method can be found in [19,25].…”

Artificial Neural Network Modelling of Vibration in the Milling of AZ91D Alloy

“…The results demonstrate that under unstable conditions the amplitude of vibration increases even by 5 times, which affects the surface quality after machining. Stability analyses are often performed for thin-walled parts made of aluminium alloys such as EN AW-7075 T6 [17,22], EN AW-2024-T351 [2] and EN AW-6061-T6 [23,24]. The works [17,18] investigate acceleration and cutting force components to determine the stability limit for parts with a varying (decreasing) thickness of the wall.…”

Effect of technological parameters on vibration acceleration in milling and vibration prediction with artificial neural networks

“…attaining the target dimensional and shape accuracy and surface quality). The counterproductive nature of vibrations is particularly tangible in finishing operations [6] and milling of thin-walled components [7][8][9]. In order to ensure the desired stability of the process, we typically employ stability lobe diagrams; an alternative solution is recurrence quantification analysis, which is an effective tool for the determination of stability lobes for workpieces of nonuniform (decreasing) wall thickness.…”