复杂曲面薄壁件铣削颤振稳定性研究综述

Review of research on flutter stability in thin wall milling with complex curved surface

针对复杂曲面薄壁件铣削过程中出现的颤振问题,基于再生型颤振理论,对复杂曲面薄壁件铣削颤振产生的原因进行了分析,阐述了抑制颤振发生的相关工艺优化策略和颤振稳定性分析之间的联系;在此基础上,对现阶段复杂曲面铣削稳定性分析中的频域法、时域法、试验法,以及工艺优化方法研究现状进行了综述和归纳,对现阶段国内外复杂曲面薄壁件铣削颤振的抑制方法的优缺点和适用条件进行了评价,并提出了整体式叶轮五轴加工非均匀余量工艺优化策略;通过分析影响颤振稳定性的因素,提出了今后复杂曲面薄壁件颤振抑制的研究方向。研究结果表明:相对于普通铣削颤振,复杂曲面薄壁件颤振抑制更为复杂,建立三维工艺系统稳定性模型,并考虑工件模态参数的变化,可有效抑制颤振的发生。

Aiming at the problems of chatter in the milling process of thin-walled parts with complex curved surfaces,based on the regenera-tive chatter theory,the causes of chatter in the milling process of thin-walled parts with complex curved surfaces were analyzed.And the rela-tionship between the optimization strategy of technology to suppress chatter and the analysis of chatter stability was expounded.On this basis,the current research status of frequency domain method,time domain method,experimental method and process optimization method in mill-ing stability analysis of complex curved surface were summarized.The advantages,disadvantages and applicable conditions of chatter sup-pression methods for thin-walled parts with complex curved surface at home and abroad at this stage were evaluated,and the non-uniform re-sidual process optimization strategy for five-axis machining of integral impeller was put forward.Finally,by analyzing the factors affecting flutter stability,the research direction of flutter suppression for thin-walled parts with complex curved surfaces in the future was pointed out.The results show that the flutter suppression of thin-walled parts with complex curved surfaces is more complex than that of conventional mill-ing.The flutter suppression can be effectively suppressed by establishing a three-dimensional process system stability model and considering the change of workpiece modal parameters.