摘要
针对复杂曲面薄壁件加工过程中半精/精加工工艺中铣削颤振问题,以整体叶轮为例,提出一种可以明显增加叶片刚度的整体叶轮非均匀余量加工工艺优化方法。借助有限元分析软件获取工件工艺系统的固有频率和模态质量,计算出两种叶片加工工艺系统的模态刚度。基于再生型颤振分析理论建立了均匀余量和非均匀余量叶片铣削加工稳定性极限叶瓣图。对均匀余量和非均匀余量两种叶片进行切削试验验证,证明了该非均匀余量工艺优化设计策略可以明显提高加工系统刚度,对整体叶轮实际加工和生产有一定的指导意义。
In order to solve the problem of milling chatter in semi/finish machining process of complex curved surface thin-walled parts,an optimization method of non-uniform machining process of integral impeller is proposed,taking integral impeller as an example.With the help of the finite element analysis software,the natural frequency and modal mass of the workpiece processing system are obtained,and the modal stiffness of the two blade processing systems is calculated.Based on the theory of regenerative Chatter analysis,the stability limit lobes of uniform and non-uniform blades milling are established.The cutting experiments of two kinds of blades with uniform allowance and non-uniform allowance prove that the optimization design strategy of the non-uniform allowance process can obviously improve the rigidity of the machining system,which has certain guiding significance for the actual machining and production of the integral impeller.
作者
王开发
吴雁
郑刚
WANG Kai-fa;WU Yan;ZHENG Gang(School of Mechanical Engineering,Shanghai Institute of Technology,Shanghai 201418,China)
出处
《组合机床与自动化加工技术》
北大核心
2021年第4期154-157,共4页
Modular Machine Tool & Automatic Manufacturing Technique
基金
上海市重点支撑计划(170905038000)。
关键词
整体叶轮
工艺优化
颤振抑制
试验验证
integral impeller
process optimization
chatter suppression
experimental verification
