摘要
本文在对三维动态车削过程适应性建模方向及非线性数学模型进行分析的基础上,进一步以微机数值模拟的方式研究了金属车削颤振过程的机理及动态特性,从理论上证明了动态车削过程具有明显的非线性特征,颤振的产生不但与切削用量有关,而且与机床工艺系统的模态参数、刀具几何参数等均有密切的关系,合理地选择和调整切削用量,工艺系统及刀具的有关参数可以有效地改善三维车削的动态稳定性。本文模型的数值分析结论与车削颤振实验结果取得了良好的一致性,为阐明车削颤振过程的动态特性及其在线监控提供了理论依据。
The paper researches into the chatter machanism and dynamic characteristics by means of numerical analogue based on the analysis of the adapting modelling direction and non-linear mathematical model for three-dimensional dynamic turning process. It is proved theoretically that dynamic turning process has obvious non-linear characteristic in the process and the formation of turning chatter has much to do not only with cutting regime, but also with the modality parameters of the technolgical system of the lathe and cutter geometric parameters. It provides the theoretical basis for expounding turning chatter mcchamism and studying dynamic charactcmistics as well as monitoring and controlling three-dimensional turning process on-line.
