高速切削变形区温度场数值模拟与分析  

Numerical simulation and analysis of temperature field at deformation zone in high- speed milling

作　　者：安增辉 付秀丽[1] 潘延安[1] 杜倩倩[1] 

机构地区：[1]济南大学机械工程学院,山东济南250022

出　　处：《制造技术与机床》2015年第8期101-105,共5页Manufacturing Technology & Machine Tool

基　　金：国家自然科学基金青年基金项目(51105172)

摘　　要：建立了基于次摆线轨迹的高速切削数值分析模型,对切削速度在470~3 770 m/min范围内高速切削铝合金7050-T7451切削温度进行仿真模拟并验证。系统分析了切削过程中刀具-切屑、刀具-工件接触变形区的切削温度随切削时间和切削速度的分布及变化规律。基于剪切角理论并结合切削温度等值线图解释了已加工表面温度随切削速度增加表现出的二次效应,得出已加工表面温度最大时的临界切削速度约为1 650 m/min。A numerical analysis mode of high - speed milling based on trochoid theory is established. The tempera- ture of high - speed cutting aluminum alloys 7050 - T7451 has been simulated and verified between 470 m/min and 3 770 mfmin. The relation between cutting temperature and cutting speed, cutting time has been studied in the cutting deformation zone. Based on the shear plane angle＇s theory, the quadratic effect between temperature of machined surface and cutting speed is obtained and explained by means of isopleths maps of simulation results. The critical cutting speed is about 1 650 m/min when the tempera- ture of machined surface is up to maximum.

关 键 词：高速铣削 切削温度 变形区 数值模拟 

分 类 号：TH164[机械工程—机械制造及自动化]