球头铣刀拐角加工铣削力预测研究  

Research on Cutting Force Prediction for Corner Machined with Ball End Mill

作　　者：郑敏利[1] 吴迪[1] 杨琳[1] 马卉[1] 

机构地区：[1]哈尔滨理工大学机械动力工程学院,黑龙江哈尔滨150080

出　　处：《机械设计与制造》2017年第4期85-88,共4页Machinery Design & Manufacture

基　　金：国家自然科学基金重点资助项目"轿车覆盖件用大型淬硬钢模具高品质加工技术基础及应用"(51235003)

摘　　要：针对模具型腔内外拐角铣削过程,分析球头铣刀铣削直线、内拐角、外拐角的切削层变化规律,建立了基于加工特征的铣削力预测模型。利用UG绘图软件建立了球头铣刀及工件的三维几何模型,并通过DEFORM-3D仿真软件对Cr12MoV模具钢的高速铣削过程进行有限元仿真,预测了球头铣刀在铣削直线段、内拐角和外拐角的铣削力,以及内外拐角时工件曲率半径对铣削力的影响。利用三轴数控加工中心进行高速铣削实验,实验结果表明:实验所得到的铣削力与仿真结果具有很好的吻合度,证明了铣削力理论计算模型的正确性,从而验证了仿真预测的准确性和可靠性。For inzide and outside corner mold cavity milling process, analysis of ball milling straight line, inside corner, outside corner cutting layers of variation, miUing force prediction model based on the establishment of machining features. Three--dimensional geometric model of the ball end mill and the workpiece are established by UG. Finite element simulation of high-speed milling Cr12MoV mold steel is conducted by DEFORM-3D simulation on the basis. Milling force of ball end mill in milling workpiece by linear path, inner corner and outer corner can be predicted. It is further predicted that the radius curvature of workpiece in the milling the inner and outer corner has effect on milling force. Mathematical model and simulation results are in good agreement, which proves the correctness of the mathematical model. High-speed milling experiments were conducted on three-axis CNC machining centers. The results showed that the simulation can consistent with experimental results, which proves the accuracy and reliability of the simulation predictions.

关 键 词：有限元仿真 铣削力 内外拐角 曲率半径 

分 类 号：TH16[机械工程—机械制造及自动化] TG54[金属学及工艺—金属切削加工及机床]