薄壁件铣削加工颤振控制研究

Studing of Chatter Suppression in Milling of Thin-walled Parts

针对薄壁支架加工过程中出现的颤振现象,通过铣削加工颤振机理分析,并进行切削参数优化,解决了加工过程中的颤振问题。首先通过建立有限元模型,进行零件模态分析,获取零件动态特性;接着通过试验与仿真相结合的方式,获取机床-刀具系统的颤振稳定域;并进行稳定域内参数优化、零件动态特性与切削参数对比分析,最终获取避免加工颤振的切削参数,并进行加工验证试验,解决了加工颤振问题,提高了产品质量。结果表明通过切削参数优化可有效解决加工过程中得颤振问题。

The chatter problem in milling was solved by analyzing the chatter theory and optimizing the cutting parameters on the chattering phenomena in the processing of thin-walled parts.Firstly,the dynamic characteristic of the part was obtained with modal analysis on the base of the finite modeling.Secondly,the chatter stability field of the machine-tool system was achieved by combination of simulation and experiment.And lastly,the parameters to avoid chatter in milling was obtained by optimizing parameters in the chatter stability field and balancing the dynamic characteristic of the part and the practice cutting parameters.The chatter suppression was realized and the quality of the part was improved.The result showed that the chatter problem in milling could be resolved by optimizing the cutting parameters.