【作者】 张巍；

【导师】 张志伟；

【作者基本信息】 东北大学 ， 机械电子工程， 2011， 硕士

【摘要】 高速车削中心,不但能够提高金属切除效率和加工效率,而且还可以获得更加完善的加工表面,更低的工件加工温度和更小的切削力,尤其使得薄零件的加工可以获得更好的几何形状精度。本文对HTC2550hs高速车削中心的主轴部件、床身、滑板等进行静动态性能分析,研究支撑轴承刚度及主轴跨距对主轴部件静动态性能的影响。然后,对床身、滑板分别进行基于静态分析和频率的拓扑优化分析,并对去除部分关键尺寸进行尺寸优化设计,在保证其静动态性能提高的基础上,实现轻量化。本论文主要内容为：(1)对主轴部件分别进行静动态性能分析,得到主轴部件的静态刚度、各阶固有频率和相应振型。得到主轴部件静动态性能随主轴支撑轴承刚度和主轴跨距的变化规律,提出改善主轴部件静动态性能方法。(2)对高速车削中心关键静态支撑部件床身分别进行静动态性能分析,得到其实际工作中静态受力变形情况、自由状态和约束状态下的各阶固有频率和相应振型。并且,通过对床身进行的基于静态分析的拓扑优化设计及尺寸优化设计,在保证其静态性能提高基础上,实现轻量化。(3)对高速车削中心关键运动部件滑板进行静动态性能的分析,得到其实际工作中静态受力变形情况、自由状态和约束状态下的各阶固有频率和相应振型。并且,通过应用ANSYS Workbench和ANSYS经典界面联合对滑板进行基于频率的拓扑优化设计及尺寸优化设计,在保证其动态性能(第一阶和第二阶固有频率)提高的情况下,实现轻量化。更多还原

【Abstract】 High speed turning center, not only can improve metal removal efficiency and processing efficiency, but also can get better surface, lower processing temperature and smaller cutting force, and in particular better geometry accuracy. In this paper, static and dynamic analyses of HTC2550hs high speed turning center’s spindle component, lathe bed, slide board were performed. And it was obtained that the influence of bearing stiffness and bearing span on the spindle component static and dynamic performance. Then lathe bed and slide board’s topology optimizations based on static and modal analysis were performed. In the condition that their static and dynamic performances were improved, their weights were lightened. This paper’s main contents are:(1) Static and dynamic analyses of spindle component were performed. And the static stiffness, natural frequencies and modal shapes were obtained. And also, the influence of bearing span and bearing stiffness on the static and dynamic performances of spindle component were obtained.(2) Static and dynamic analyses of high speed turning center key surporting part lathe bed were performed. And its static deformantion and stress, natural frequencies and madal shapes with or without constaints were obtained. And also, with the help of lathe bed’s topology optimization base on static analysis and dimension optimization, it achieved that the lathe bed’s weight was lightened and its static performance was improved.(3) Static and dynamic analyses of high speed turning center key moving part slide board were performed. And its static deformantion and stress, natural frequencies and madal shapes with or without constaints were obtained. And also, with the help of slide board’s topology optimization base on modal analysis and dimension optimization, it achieved that the slide board’s weight was lightened and its dynamic performance was improved.更多还原