摘要
提出以机床立柱和主轴箱不同位置的组合为对象,采用试验设计结合响应面模型的方法研究机床在整个加工空间内的切削稳定性分布规律的方法.选择立柱和主轴箱在移动轨迹上的关键位置的组合作为计算样本点,在ANSYS仿真软件中对样本点的机床动力学特性进行分析.计算每个样本点的最小临界切削深度,建立反映位置特征与最小临界切削深度数值的二次多项式响应面模型,模拟在整个空间内的稳定性切削极限深度近似值,对该响应面模型的质量进行评价.以一台卧式高速加工中心为例,说明了机床立柱位置的变化对切削稳定性有较大影响,为结构和工艺的优化设计提供了理论依据.
A method of combining the response surface mode（RSM）and experimental design was presented based on the combination of different positions in the moving trajectory of the machine tool spindle box and the column in order to analyze the cutting stability in the whole processing spatial distribution.A combination at key position was selected as samples,and the dynamics property of the samples was calculated via ANSYS.The limit critical cutting depth of each sample was calculated,and the quadratic polynomial RSM reflecting the relation between position and stability of limit critical cutting depth was established.The limit critical cutting depth in the entire space approximation was calculated,and the quality of RSM was further evaluated.The great influence of position changes of moving parts on the stability of cutting was shown with a high speed horizontal machining center（MC）as an example,providing some theoretical support for optimization of machining process and structure design.
出处
《浙江大学学报（工学版）》
EI
CAS
CSCD
北大核心
2015年第7期1215-1223,共9页
Journal of Zhejiang University：Engineering Science
基金
国家自然科学基金资助项目(51275458)
浙江省博士后科研资助项目(BSH1401013)
国家科技重大专项课资助项目(2015ZX04014021)
