立铣加工动态切削力预测新方法及应用  

New Dynamic Cutting Force Modelling of End Milling and Its Application

作　　者：孙暄[1] 安庆龙[2] 张东进[2] 陈明[2] 

机构地区：[1]上海交通职业技术学院,上海200232 [2]上海交通大学机械与动力工程学院,上海200240

出　　处：《机械设计与研究》2008年第3期84-88,共5页Machine Design And Research

基　　金：国家自然科学基金资助项目(50675134)

摘　　要：通过切削力物理建模、仿真和应用研究来准确地预测切削力,是进行工艺优化的必要前提。动态切削力的预测对于研究切削机理和加工质量的控制都很重要。提出了一种新的螺旋立铣刀加工中动态切削力建模方法,通过微元法建立的切削力数学模型和斜角等厚度切削有限元模型两者结合,对高速铣削淬硬模具钢SKD11的动态切削力进行预测,并且对误差来源进行了分析。本建模方法通过建立单刃切削力数学模型,然后结合有限元分析得到单刃切削力曲线,经离散数据叠加后得到加工过程的动态铣削力曲线。此方法可避免传统建模中需要大量试验求取多个系数且预测精度差的特点。最后通过分析影响结果的主要因素及参数调节方法,保证了预测精度。It is a prerequisite that predicts the cutting force accurately by physical modeling, simulation and application research. Prediction of dynamic cutting forces is very important to research the cutting mechanism and controlling machining quality. In this paper, a new effective predigested dynamic cutting forces model of end milling is propesed. A mathematic model based on differential method and a 3D oblique equal -thickness FEA（ finite element analysis） model are integrated so as to predict the cutting force of milling hardened die steel SKD11 in three dimensions. The possible source of this simulationg errors is also studied. This modeling method can be used to develop the cutting force mathematic model of one single tool edge and get the force curves of it with the help of FEA. This method can avoid lots of cutting experiments in triditional modelling for getting several coefficients, and yet the prediction aceouacy is pook. After analy zing the main foctors which influence the results, so the prediction accuracy is gaeranteed.

关 键 词：螺旋圆柱铣刀 模具钢 切削力 微元法 斜角等厚度切削 

分 类 号：TG54[金属学及工艺—金属切削加工及机床]