基于斜角切削理论的立铣切削力预测研究  

Cutting Force Prediction Based on Oblique Cutting Theory in End Milling

作　　者：李炳林[1] 胡于进[1] 王学林[1] 李成刚[1] 

机构地区：[1]华中科技大学,武汉430074

出　　处：《中国机械工程》2011年第19期2283-2288,共6页China Mechanical Engineering

基　　金：国家重点基础研究发展计划(973计划)资助项目(2009CB724306)

摘　　要：为了预测立铣加工的切削力,把立铣刀的切削刃离散为一系列无限小的斜角切削单元。对于每个微元斜角切削单元,应用斜角切削理论来建立切屑通过时剪切区的应力、应变、应变率和温度的控制方程。采用数值方法根据控制方程计算出流动应力,并根据斜角切削和铣削之间的力变换关系,把流动应力转化为铣削力。最后,对45钢进行了多组不同切削参数的立铣实验,仿真和实验的对比结果验证了所提出模型的有效性。该方法同样可以用于其他加工方式(如车削和钻削)的建模。A new approach was proposed to predict the cutting forces in end milling.The helical flutes were decomposed a set of differential oblique cutting edges.At every oblique cutting element,the governing equations of stress,strain,strain rate and temperature of chip through the primary shear zone were established using oblique cutting theory.The flow stress was calculated iteratively from the governing equations.Cutting forces were predicted using oblique cutting transformation into end milling.The simulation and experimental results for machining 45 steel were compared,a good agreement is observed for the different cutting conditions.The proposed method can easily be extended to other machining operations such as turning and drilling.

关 键 词：立铣 切削力 流动应力 斜角切削 

分 类 号：TG501.3[金属学及工艺—金属切削加工及机床] TP391.73[自动化与计算机技术—计算机应用技术]