摘要
针对金属粉末注射料熔体填充中心浇口圆盘模腔的过程,建立其充模的物理模型和数学模型,求解得到圆盘模腔充模过程中速度场、压力场的分布。根据有关数据,计算得到振动条件下模腔中模腔压力随填充时间变化的理论曲线,并与试验测得的曲线进行比较。通过比较发现:理论计算的模腔压力与实测的模腔压力基本吻合;振动力场的引入,有利于缩短充模时间,提高瞬态模腔压力。
Filling process of MIM feedstock into a disk-shaped center-gated mold cavity was studied. A physical model and a mathematical model were built to predict the distribution of the velocity field and the pressure field. Based on the related datum, the theoretical curves of the filling pressure for different filling time at different locations in the cavity under different vibration conditions were gained, comparison between theoretical curves and experiment curves was made. It is shown that for the cavity pressure, theoretical and experimental results are basically consistent. Introduction of vibration force field is beneficial to shorten, filling time and increase transient cavity pressure.
出处
《粉末冶金技术》
EI
CAS
CSCD
北大核心
2006年第6期412-416,共5页
Powder Metallurgy Technology
基金
国家"863"计划子课题(2001AA337050-05)基金项目
