多轴加工工艺系统综合动刚度建模与性能分析  

General dynamic stiffness modeling and performance analysis for multi-axis machining system

作　　者：闫蓉[1] 潘文斌[1] 彭芳瑜[2] 蔡飞飞[1] 

机构地区：[1]华中科技大学国家数控系统工程技术研究中心,湖北武汉430074 [2]华中科技大学数字制造装备与技术国家重点实验室,湖北武汉430074

出　　处：《华中科技大学学报（自然科学版）》2012年第11期1-5,共5页Journal of Huazhong University of Science and Technology(Natural Science Edition)

基　　金：国家自然科学基金资助项目(51075168;50835004);国家高技术研究发展计划资助项目(2011CB706803)

摘　　要：建立了机床-刀具-工件整体工艺系统综合动刚度场模型,采用实验和仿真相结合的方法计算综合动刚度场.该动刚度场可反映整体工艺系统在工作空间中不同加工位置、不同刀具-工件相对姿态的综合动刚度分布规律.提出了表征整体工艺系统综合动刚度性能的指标,该指标能定量描述多轴加工工艺系统动刚度较弱的频率区间和刚度软化的程度,可用于指导加工稳定性建模与分析.The synthetical dynamic stiffness of machine-cutter-workpiece integral process system was established. Additionally, the synthetical dynamic-stiffness field was calculated through simulations and experiments which reflects distributing principle of synthetical dynamic stiffness of integral process system in different machining positions and ＂cutter-workpiece＂ relative pose in work space. Finally, performance indexes were proposed to characterize dynamic stiffness of the integral process system. These indexes can quantitatively describe softening degree and frequency range of multi-axis machining process system when its dynamic stiffness is low and thus instruct the analysis and model- ing of process stability.

关 键 词：多轴加工 工艺系统 动态特性 动刚度 性能指标 

分 类 号：TH164[机械工程—机械制造及自动化]