摘要
为了对整体薄壁件铣削系统加工稳定性进行分析,建立主轴-刀具-工件整体系统连续梁模型,从中提取刀具与薄壁工件端部的等效质量和等效刚度特性,分析工件尺寸对系统铣削稳定性的影响。结果发现,薄壁工件横截面宽度与高度尺寸对铣削稳定性都有影响,其中高度尺寸的影响更大。当高度值很小时,系统的临界铣削深度非常小,随着工件横截面高度的增加,系统的临界铣削深度有明显提高。当工件的第一阶固有频率接近甚至大于主轴-刀具的第一阶固有频率时,工件外形尺寸则不会再对铣削系统的稳定性有明显的改变。该结果可为薄壁件的稳定性加工提供理论基础。
In order to analyze the stability of the thin-walled milling system,a continuous beam model of spindle tool workpiece system is established,from which,the equivalent mass and stiffness are obtained from the end of cutter and workpiece, respectively.The influences of workpiece sizes on milling stability of the system are researched consequently.The results show that the cross sectional width and height of thin wailed workpiece has non-negligible influences on the milling stability.Among them,the height has greater impact,for a small height value pulis down the critical cutting depth severely.With the increase of the cross sectionaX height of workpiece,critical milling depth improves obviously.It is also noted that as the first natural frequency of the workpiece is close to or even greater than that of the spindle-cutter system,the workpiece' shape has not significant influence on the milling stability.These above results can provide a theoretical basis for the stability machining for thin-walled parts.
作者
农胜隆
高尚晗
黄艳
NONG ShengLong;GAO ShangHan;HUANG Yan(Lushan College of Guangxi University of Science and Technology,Liuzhou 545616,China;School of Mechanical Engineering,Guangxi University of Science and Technology,Liuzhou 545006,China)
出处
《机械强度》
CAS
CSCD
北大核心
2018年第6期1419-1424,共6页
Journal of Mechanical Strength
基金
国家自然科学基金项目(51105084)
广西高校中青年教师基础能力提升项目(2017KY1393)资助~~
关键词
临界铣削深度
连续梁模型
主轴-刀具
工件
稳定性
Critical milling depth
Continuous beam model
Spindle cutter system
Workpiece
Stability
