I型拉伸棒金属注射成形3D充模模拟  

3D computer simulation of die filling process for metal injection molding tensile rod

作　　者：郭剑锋[1] 李云卿[1] 曲选辉[2] 郑洲顺[1] 

机构地区：[1]中南大学粉末冶金国家重点实验室,湖南长沙410083 [2]北京科技大学材料科学与工程学院,北京100083

出　　处：《中南大学学报（自然科学版）》2004年第2期180-185,共6页Journal of Central South University:Science and Technology

基　　金：国家杰出青年科学基金资助项目(50025412);国家"973"重点基础研究项目(G2000067203);国家教育部博士点基金资助项目(20010008020)

摘　　要：基于ANSYS提供的Z Buffer切片模型空间观测方式模拟了注射成形喂料在简单几何模腔的流动情况。讨论了浇口位置、浇口大小和模壁温度等工艺参数对熔体充模过程的影响,预测注射成形过程中部分常见缺陷产生的条件。模拟结果表明:当采用长×宽为4mm×1mm的侧面浇口,模温为320K、注射温度为400K以及体积流量为60cm3/s的注射参数时进行注射,可以得到良好的无缺陷硬质合金I型拉伸试样预成形坯。The 3D simulation of cemented carbide feedstock filling simple geometric cavity was investigated by using the Z-Buffer solid observation function of ANSYS. The effects of the three main parameters on the filling process, including inlet position, inlet size, wall temperature, were discussed, respectively. The conditions for some defects, which often appear in the process of the metal powder injection molding, were also predicted. The simulation results show that good I-shape green compacts of cemented carbide could be obtained when the volume flow velocity, the dimensions of lateral inlet size, the wall temperature and the injection temperature are 60cm3/s, 4 mm×1 mm, 320K and 400K, respectively, which is proved to be consistent with the experimental results.

关 键 词：注射成形 充模流动 3D模拟 金属零部件 Ⅰ型拉伸棒 

分 类 号：TG39[金属学及工艺—金属压力加工]