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·The variable preload technologies and methods which can select an optimal preload which maximizes the performance of a spindle system and bearings are most important This study proposes a new and very simple variable preload determination method that specifically configures the optimal preload according to the purpose of spindle systems Based
· Determining the optimal number of clusters The determination of the optimal number of clusters has always been a key problem in clustering In the previous researches many CVIs were proposed to evaluate the clustering results and determine the optimal number of clusters [27 28 29 30 31] The general principle of the CVI is that the compactness of clustering
·Machine tools are vital to modern industries The performance of a machine tool is assessed according to the dimensional accuracy and surface finish of the machined work pieces which are closely related to the dynamic characteristics of the spindle bearing system The main purpose of this study is to review relevant studies on dynamic models and the design
·As a key parameter stiffness determines the dynamic characteristics of both the bearing and the spindle unit However interactions between the spindle speed initial preload and cutting force caused by the thermal expansion of spindle unit components alter the bearing stiffness characteristics during the running process Aiming to carry out real time online
·CIRP Annals Manufacturing Technology 53 2 619 642 Google Scholar Brecher C Essera M Witta S 2009 Interaction of manufacturing process and machine tool CIRP Annals Manufacturing Technology 58 2 588 607 Google Scholar Abele E Altintas Y Brecher C 2010 Machine tool spindle units
·The cutting performance relates to the dynamic properties of the whole system of the tool spindle and machine tool frame The impact of the machine frame properties on the dynamic properties at the tool end point is studied both experimentally and using a coupled simulation model Coupled model of the whole mechanical system is created as a system
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