精选优质文档-倾情为你奉上附录A 英文原文Machine tool spindle unitsA.1 IntroductionMachine tool spindles basically fulfill two tasks: rotate the tools (drilling, milling and grinding) or work piece (turning) precisely in space transmit the required energy to the cutting zone for metal removalObviously spindles have a strong influence on metal removal rates and quality of the machined parts. This paper reviews the current state.and presents research challenges of spindle technology.A.1.1.Hist
