大型GCr15丝杠高速硬旋铣多尺度有限元建模关键技术研究  

FEM-based multi-scale modeling technology for the process of high-speed hard whirling of large lead screw with material of GCr15

作　　者：倪寿勇[1,2] 李迎[1] 

机构地区：[1]南京理工大学机械工程学院,南京210094 [2]钟山职业技术学院机电与汽车工程系,南京210049

出　　处：《现代制造工程》2011年第5期109-116,共8页Modern Manufacturing Engineering

基　　金：国家科技重大专项项目(2009ZX04001-171-02)

摘　　要：高速硬旋铣加工技术正成为大型螺纹件加工的重要手段,但该工艺加工机理研究的滞后制约了其加工性能的进一步提升。综合分析高速硬旋铣工艺的工件材料特性、切削运动过程和工艺参数,对GCr15的高速切削本构模型、切屑分离、刀屑界面特性、刀具磨损、工装结合面特性和刀盘动态特性等高速硬旋铣跨尺度有限元建模技术进行了剖析,规划设计了该工艺的FEM模型。High-speed hard whirling has been a import process for large thread part machining.However the study of its machining mechanism is inferior to its application,which has induced constraints for the improvement of the machining performance.After analyzing of the material properties of work pieces,cutting movement and process parameters,a series of key technologies of FEM-based modeling for high-speed whirling were prompted and summarized such as constitutive cutting equation for GCr15,chip separation and breakage criterion,interface properties of tool-chip,tool interaction wear,clamping contact surface properties,dynamic behavior of tool disk,a general FEM-based model for the process was investigated and accomplished at last.

关 键 词：硬旋铣 高速加工 有限元模型 多尺度模型 丝杠 

分 类 号：TH16[机械工程—机械制造及自动化] O32-34[理学—一般力学与力学基础]