Dynamic Analysis and Design of a Machine Tool Spindle-Bearing System

Abstract

The paper simulates a spindle-bearing system with a finite-element model; then compares it to the experimental results. Radial and tilting springs and dashpots are considered in angular contact spindle ball bearings. This FEM model shows that additional tilting characteristics make significant effect on higher-order vibration modes. The design parameters used in this study are bearing preloads, bearing spacings, mass inserts on spindle and damping. Computations and experimental results show that improvements can be made by adjusting the forementioned parameters.

Model-based chatter stability prediction for high-speed spindles

“…Most of these factors are independent of the spindle speed, but bearing stiffness depends on changes in load and spindle speed. Wang and Chang [10] performed a finite-element model (FEM) analysis on a two-bearing spindle using a Rayleigh beam, without taking high-speed effects into account. Results show the importance of internal bearing contact angle variation on the high vibration modes.…”

Expert spindle design system

“…Chen et al [6] and Nataraj and Ashrafiuon [7] demonstrated the optimization results to minimize the forces transmitted by the bearings to the supports. Wang and Chang [8] simulated a spindle-bearing system with a finite element model and compared it to the experimental results. They concluded that the optimum bearing spacing for static stiffness does not guarantee an optimum system dynamic stiffness of the spindle.…”

Dynamic Analysis of Spindle Shaft

“…Dynamics of spindle effects on the cutting ability and performance of the machining operation thus the investigation of spindle dynamics is significant. It can be analysed by using the Finite Element Method using analysis software's [8], here we use Solid-works simulation for analysis and verify the obtained results with Experimental Modal Analysis of Impact hammer test.If the natural frequency of the any structure coincide with the same frequency of external energy causes resonance leads to the vibration of the structure hence modal analysis of any rotating systems are significant. Modal analysis is the method that dynamic performance can be analysed, evaluated forecast and optimized by right of its modal parameter.…”

“…The advancement of HSM spindle design consists of configuration comprises of integrating various mechanical functions to increase system performance, accordingly interaction and coupling between various function is significant hence spindle behaviour become very difficult to analyse [1]. Spindle shaft is one of the important part in spindle assembly its dynamic characteristics directly affects the cutting performance of spindle and hence it made more importance on spindle shaft subjected to the dynamic analysis [2]. Reddy and Sharan [3,4] used a finite-element model to study dynamic behaviour of a lathe spindle and its design consideration.…”