BKX-I型变轴机床的伸缩轴刚度实验数据回归分析  

Regression Analysis of the Stiffness Experiment Data of the Extensible Struts of BKX-I Variable-Axis Machine Tool

作　　者：付铁[1] 丁洪生[1] 何小妹[1] 付大伟[1] 庞思勤[1] 

机构地区：[1]北京理工大学机械与车辆工程学院,北京100081

出　　处：《机械科学与技术》2004年第2期215-217,共3页Mechanical Science and Technology for Aerospace Engineering

摘　　要：Stewart平台作为变轴数控机床的运动部件 ,其刚度是影响机床综合刚度的主要因素之一 ,因而也会最终影响机床的加工精度。本文以BKX -I型变轴机床的伸缩轴为研究对象 ,用实验的方法 ,从变形的角度分析了伸缩轴的刚度变化规律。通过对实验数据的线性回归分析 ,建立了伸缩轴的刚度计算模型 ,并利用该模型扼要地分析了整机的综合刚度在不同高度工作空间中的分布规律。Stewart platform is the kinetic assembly of variable-axis NC machine tools. The platform' s stiffness is one of the main factors which affect the global stiffness; it will influence the operating accuracy of the machine tools. Based on BKX-I variable-axis NC machine tool, the stiffness law is analyzed throughmeasuring from the pointof thedeformation of the extensible struts. The stiffness computation model is derived by linear regression analysis of the experimentdata. Moreover, theglobal stiffnessdistributing statusof the machine toolis briefly analyzed using the previous model.

关 键 词：变轴数控机床 实验数据处理 线性回归分析 

分 类 号：TG502[金属学及工艺—金属切削加工及机床]