摘要
在航空叶片、整体叶盘等零件高速高效加工过程中,切削过程阻尼作用的减弱,致使颤振相比低速切削时更容易发生,严重影响了加工精度和效率的提高。而颤振监控作为智能主轴的主要功能之一,是解决高速高效加工过程中颤振难题的一种有效途径。首先,在主轴结构上集成压电作动器及位移传感器等,搭建颤振主动控制系统,并在此基础上,建立主动控制系统模型。然后,分析主轴系统动态特性,据此设计模糊控制规则,开发模糊控制器。接着,通过力锤激励试验及扫频试验辨识主轴动态系统模型,进行铣削加工及颤振控制仿真分析。最后,开展铣削颤振主动控制试验。试验结果表明,提出的颤振模糊控制方法能够有效控制铣削颤振,提升铣削加工的稳定性。
In the process of high speed and high efficiency machining of parts such as aeronautical blades,chatter is more likely to occur than low speed cutting process due to the weakening of the damping effect in the cutting process.As one of the main functions of intelligent spindle,chatter monitoring and control is an effective way to solve the chatter problem in high speed and high efficiency machining process.First of all,an active control structure is designed by integrating piezoelectric actuators and displacement sensors into the spindle system.According to the structure,the active control system model is developed.Then,the dynamic characteristics of the active spindle structure are analyzed.Based on that,the control rules and the fuzzy controller are developed.Next,the system equation is obtained through hammer tests and sweep-frequency tests.A numerical example is also performed to analyze the chatter control effects.Finally,chatter control milling experiments are performed.The results show that the proposed active control method can effectively control milling chatter and improve the stability of the milling process.
作者
曹宏瑞
李登辉
刘金鑫
张兴武
陈雪峰
CAO Hongrui;LI Denghui;LIUJinxin;ZHANG Xingwu;CHEN Xuefeng(School of Mechanical Engineering,Xi’an Jiaotong University,Xi’an 710049;State Key Laboratory for Manufacturing Systems Engineering,Xi’an Jiaotong University,Xi’an 710049)
出处
《机械工程学报》
EI
CAS
CSCD
北大核心
2021年第13期55-62,共8页
Journal of Mechanical Engineering
基金
国家自然科学基金资助项目(51922084,11772244)。
关键词
高速铣削
颤振
模糊控制
主动控制
压电作动器
high speed milling
chatter
fuzzy control
active control
piezoelectric actuator
