摘要
提出一种简便、实用的铣削系统稳定性判定方法,此判定方法的基本理论依据,一是铣削系统稳定性极限好的位置所对应的刀齿通过频率(主轴转速与刀齿数的乘积)等于系统的固有频率及其分、倍频;二是共振区的半带宽理论。方法的输入条件是系统的模态参数和部分切削参数,且需要现场进行简单的变切深试验,通过测试获得的响应信号判断系统的稳定性极限。此方法与以往的稳定性分析方法相比,具有简单、实用、可靠等优点,其判定准确性可以完全满足实际加工现场的需要。
A novel method which may simply obtain stability limits of system in practical milling processes is proposed. The method is based on two theories： the first is that the stability boundary has a typical ＇lobed＇ structure, with stability maxima located at spindle speeds corresponding to the integer fractions of the eigen-frequencies of the most flexible modes of the machine-tool-workpiece system; the second is theory of semi-bandwidth for resonant region. The input parameters of the method are the modal parameters of the system and partial cutting parameters. It is necessary to conduct a experiment with variable depth of cut. The stability limits can be obtained by analyses of the response signals measured during the cutting processes. Compared with original method, the advantages of the presented method are simple, convenience, practicality, and reliability. Veracity of the method can meet the demands in the practical machining operations.
出处
《机械强度》
EI
CAS
CSCD
北大核心
2008年第5期718-722,共5页
Journal of Mechanical Strength
基金
国家自然科学基金重点资助项目(50435020)
国家自然科学基金资助项目(50705052)
山东省自然科学基金资助项目(Y2007F41)~~
关键词
再生颤振
强迫振动
共振
铣削稳定性
变切深
Regenerative chatter
Forced vibration
Resonance
Milling stability
Variable depth of cut
