钛合金小孔电火花加工有限元仿真研究  

Finite Element Simulation of Small-hole on Titanium Alloy Drilled by EDM

作　　者：王续跃[1] 胡辉[1] 梁延德[1] 徐文骥[1] 

机构地区：[1]大连理工大学,大连116023

出　　处：《中国机械工程》2013年第13期1738-1742,1748,共6页China Mechanical Engineering

摘　　要：为有效地预测钛合金材料电火花小孔加工的体积去除率,利用有限元法建立了单脉冲电火花加工钛合金小孔的数学模型。模型考虑了诸多因素:高斯热源模型、能量分配率、随放电时间变化的放电半径以及熔融潜热。应用生死单元法模拟出去除体积形貌图,然后计算出单脉冲去除体积。采用K1C高速小孔机加工钛合金小孔,记录加工时间,利用称重法得出加工前后重量,从而算出单脉冲体积去除率。验证实验得出,实际加工单脉冲体积去除率和模拟结果的误差小于10%,结果表明,仿真模型可较准确地预测体积去除率,为指导电火花加工钛合金小孔提供了依据。In order to predict volume removal rate of small--hole on titanium alloy drilled by EDM efficiently, a mathematical model of single--pulse on drilling small--hole on titanium alloy was developed with the application of finite element simulation. The model utilized several important pa- rameters such as Gaussian heat source model, percentage distribution of the heat input among work- piece, spark radius with the discharge time and latent heat of melting . The picture of removed vol- ume was simulated with the method of elements with birth and death. Then the volume removal rate was calculated finally. An experiment of drilling small--hole on titanium was carried out on KIC high --speed machining, time was recorded. Weighing method was applied to get the weigh before and af- ter EDM. Then, the volume removal rate by single--pulse was calculated. Compared simulation and experimental results, the error volume removal rate by EDM. by EDM. is less than 10%. The model has Consultation is provided to guide the preferable prediction precision on small--hole on titanium alloy drilled

关 键 词：电火花加工 钛合金小孔 数学模型 体积去除率 

分 类 号：TG66[金属学及工艺—金属切削加工及机床]