Chatter Stability Model of Micro-Milling With Process Damping
Chatter Stability Model of Micro-Milling With Process Damping
复制标题
DOI：
10.1115/1.4024038
复制
发表时间：
2013-06
影响因子：
4
通讯作者：
Xiaoliang Jin;Y. Altintas
中科院分区：
文献类型：
--
作者：
Xiaoliang Jin;Y. Altintas
本文从材料的本构流动应力和微立铣刀的结构动力学出发，对微细铣削加工的切削力和颤振稳定性进行了预测。采用滑移线场或有限元方法识别切削力系数，并考虑切屑尺寸、刃口半径、前倾角和切削速度的影响。用有限元方法模拟了圆刃犁削过程中的过程阻尼。通过专门设计的压电致动器机构，测量了脆性微磨机的频响函数。建立了具有速度相关过程减振机构的微细磨削动力学模型，并在频域内预测了微细磨削加工的颤振稳定性。所提出的模型在AISI1045钢的微细加工中得到了实验验证。
This paper presents the prediction of cutting forces and chatter stability of micro-milling operations from the material's constitutive flow stress and structural dynamics of the micro-end mill. The cutting force coefficients are identified either using previously presented slip-line field or finite element methods by considering the effects of chip size, cutting edge radius, rake angle and cutting speed. The process damping caused by the plowing of round edge is modeled by finite element method. The frequency response function of the fragile micro-mill is measured through specially devised piezo actuator mechanism. Dynamic model of micro-milling with the velocity dependent process damping mechanism is presented, and the chatter stability is predicted in frequency domain. The proposed models have been experimentally verified in micro-milling of AISI 1045 steel.