A Modeling Approach for Analysis and Improvement of Spindle-Holder-Tool Assembly Dynamics

Identification of bearing dynamics under operational conditions for chatter stability prediction in high speed machining operations

“…In determining tool point FRF theoretically, the receptance coupling approach proposed in previous studies [12,13] is combined with a recent method developed by Orkun et al [29]. In this study, spindle-holder-tool assembly is divided into subcomponents (spindle, holder and tool) and each subcomponent is modeled using Timoshenko beam model including gyroscopic moments.…”

“…Schmitz's semianalytical method in determining tool point FRF has been followed by several studies based on receptance coupling [10][11][12]. In addition to semi-analytical models, Ertürk and coworkers [13] proposed an experimentally verified [13,14] analytical model for predicting tool point FRF by combining receptance coupling and structural modification techniques. In this mathematical model, all components of a spindle-holder-tool assembly were modeled analytically with the Timoshenko beam theory, and combined with the contact parameters at the spindle-holder and holder-tool interfaces.…”

Speed Effects on Inherent Rotating Frequency of Motorized Spindle System

“…Fig.1 is the structural diagram of spindle system, including the spindle, front and rear bearing group, rotor, stator, shaft rod, shell and all parts of the sleeve and counter balance, etc. The influencing factors of high-speed spindle system dynamics can be divided into three categories: one includes the spindle, tool holder, tool structure size, bearing [5] and static parameters such as the cutting force on tip points [6][7] which does not change with the rotating speed; one is the junctional parameters of the spindle system [8][9] , including the surface features of spindle-holder, holder-tool; one is the dynamic mechanical parameters induced by the rotating speed, including the shafting centrifugal force, gyroscopic moment, bearing stiffness and other factors, which is the focus of this paper.…”

Ultrasonic measurement of contact stiffness and pressure distribution on spindle–holder taper interfaces

“…However, acquiring accurate modal data or FRFs requires tremendous efforts [15]. Furthermore, any errors in the modeling or measurement of the spindle-holder assembly will be compensated by the extracted inaccurate or incorrect interface parameters [3,16,17].…”