The effect of tool geometry on regenerative instability in ultrasonic vibration cutting

Research of Tool Nose Radius in Ultrasonic Vibration Cutting for Difficult-to-cut Materials

“…The authors made use of a new cutting model which has been experimentally proven including ultrasonic vibration cutting process to predict the occurrence of regenerative chatter with 2DoF(degrees of freedom ) differential equations , where the intermittment cutting force is used to instead of continuous force in the practical cutting methods [1,2,3]. In order to study the mechanism of the occurrence of regenerative chatter, a numerical simulation is given under different cutting conditions according to the regenerative chatter model shown in Fig.…”

Analysis of Cutting Stability in Vibration Assisted Machining Using Ananalytical Predictive Force Model

“…One feasible explanation is that VAM can increase cutting stability and suppress chatter compared with CM, thus the component can get higher accuracy and better surface roughness after machining [8], and a larger depth of cut can be used to increase the rate of metal removal. Xiao et al [8][9][10] did some time-domain simulations for cutting stability analysis in CM and VAM, giving force and vibration levels for the selected cutting conditions, which showed VAM can suppress chatter and increase cutting stability under these conditions regardless of the tool geometry. However, stability lobe diagram (SLD) is unavailable in their paper to give a global comparison of the stability behavior under a wide range of cutting conditions so that it is not exact to claim that vibration assisted machining can always achieve a higher cutting stability in their studies.…”

FEM analysis of ultrasonic-vibration-assisted turning and the vibratory tool

“…Various aspects of UAM are currently subject to extensive investigations. The areas under investigation include the basic principles and mechanism of UAM; extending the application of UAM to other machining processes than turning such as drilling, milling, grinding, honing, lapping and electrodischarge machining; vibration control and stability analysis; the effect of tool geometry; hardware development such as autoresonant control to keep piezoelectric transducers at resonant conditions under varying dynamic loads, and elliptical vibration transducers; and finite element analysis of UAM (Ya et al, 2002;Neugebauer and Stoll, 2004;Pei and Ferreira, 1999;Ichida et al, 2005;Zhu et al, 2002;Wang et al, 2002;Amer, 2007;Xiao et al, 2006;Babitsky et al, 2004;Li and Zhang, 2006;Ahmed et al, 2007;Mitrofanov et al, 2003 subjects of UAM, machining of hard-to-cut materials has been paid particular attention, such as machining of alloy steels and titanium alloys, drilling of Inconel superalloy, turning of Inconel 718, and machining of ceramics and glass (Xiao et al, 2003;Singh and Khamba, 2007;Azarhoushang and Akbari, 2007;Ahmed et al, 2006;Choi et al, 2007).…”