模具淬硬钢高速铣削加工的有限元模拟  

Simulation of high-speed milling process for mould quenched steel

作　　者：唐德文[1] 邱长军[1] 

机构地区：[1]南华大学,衡阳421001

出　　处：《机械设计与制造》2011年第12期13-15,共3页Machinery Design & Manufacture

基　　金：国家自然基金(50660115);国家863计划(2009AA044302)资助

摘　　要：研究了高速铣削加工数值模拟所涉及的切削层等效简化铣削加工模型,分析了工件材料的流动应力模型与刀屑接触面的摩擦模型和热传导控制方程等关键技术。并根据等效简化模型平面应变特征的特点,建立了铣削加工数值模拟的2-D有限元模型。基于此模型对高速铣削加工淬硬钢P20的切削力、应力和温度进行了有限元模拟。通过铣削力切削加工实验测得了相同条件下的铣削力值。结果表明:实验铣削力值与数值模拟在一定的误差范围内结果一致。由此可见,采用具有平面应变特征的有限元模型进行应力和温度的模拟切削过程是可信的。高速铣削加工有限元模拟研究为淬硬钢切削加工的工艺参数优化、刀具的优选和工艺规划奠定了基础。Equivalent simplified model for numerical simulation of milling layer of high speed milling was analyzed,and some key technologies such as flow stress model of workpiece material,friction model of tool-chip interface and heat conduction equation were studied as well.Then according to plane strain properties of the equivalent simplified model,a 2D finite element model for numerical Simulation of the high speed milling process was established,based on which finite element simulation for milling force, stress and cutting temperature of P20 mould quenched steel were carried out.Through a milling force experiment, a value for milling force was obtained under the same conditions ,which result proves that the miUingforce obtained from the experiment and that from numerical simulation is no difference within certain error range. Thus it is reliable to simulate the miUing process of stress and temperature by applyingfinite element model with plane strain properties, which has laid a base for process parameter optimization,tool selection opti- mization and techniques programming for milling process of quenched steel.

关 键 词：淬硬钢 高速铣削加工 有限元模拟 

分 类 号：TH036[机械工程] TG306[金属学及工艺—金属压力加工]