摘要
实践证明,动态切削时低速下的稳定极限切削宽度要比高速时得出的宽度值大,后刀面与加工表面的动态接触作用力被认为是引起该现象产生的最大原因。通过分析后刀面与工件的接触长度计算出后刀面上的作用力,并将此作用力等效为黏性阻尼然后附加到系统阻尼上,从而得出了新的稳定切削宽度的计算公式。
It is verified that the limit cut width will be larger at low-speed dynamic cutting. There are many factors contribute to this phenomenon, among them the contact between flank and the cut surface is considered to be the most notable factor. In this paper, through the analysis of the contact length between flank and the material, the resistant force is calculated, and then translate this force to be equivalent linear viscous damping. With the system damping and the equivalent damping, the formula of limit cut width is improved.
出处
《机械工程与自动化》
2013年第2期109-111,共3页
Mechanical Engineering & Automation
基金
中北大学科学基金项目
关键词
颤振
低速效应
后刀面作用力
切削阻尼
chatter
low-speed phenomenon
resistant force
cutting damping
