论文部分内容阅读
在高速微铣削加工过程中,提高生产效率和零件质量的需求日益强烈,这使得机床一直在系统的动态稳定性极限附近工作,而机床颤振的存在是限制微铣削加工生产率的主要障碍。基于颤振稳定性的准确预测,能采取一些措施来提高动态稳定性极限,例如通过改变铣刀结构。提出了数值分析与铣削实验相结合的方法,采用变齿距微铣刀来研究铣削加工的动态特性和稳定性。另外提出了采用时域仿真的输出力来表征加工稳定性的新方法,采用变齿距铣刀可以非常有效地提高某些速度范围的颤振稳定性。对于选定刀具的加工,这种方法可以用于加工优化,或在设计阶段预测刀具新型结构的性能。
There is a growing demand for higher productivity and component quality during high-speed micro-milling, which keeps the machine tool near the dynamic stability limit of the system, and the presence of machine chatter is a major obstacle to limiting the productivity of micro-milling. Based on the accurate prediction of flutter stability, some measures can be taken to increase the dynamic stability limit, for example by changing the milling cutter structure. The method of combining numerical analysis and milling experiment is put forward. The variable pitch milling cutter is used to study the dynamic characteristics and stability of milling. In addition, a new method to characterize the processing stability by using the output force of time-domain simulation is proposed. The variable pitch milling cutter can effectively improve the flutter stability of some speed ranges. For the machining of a selected tool, this method can be used for machining optimization or to predict the performance of the new structure of the tool during the design phase.