ZHONG Wenzhen, ZE Xiangbo, LI Guoping, CHEN Chao, WANG Qiqing

(School of Mechanical Engineering, University of Jinan, Jinan 250022，China)

Abstract: In order to study the flow characteristics of spherical glass beads during die filling, the influence of the diameter of glass beads on the air sensitive index was studied; high speed camera was used to record the die filling process of 1.99 mm glass beads using shoe-die filling system, and the influence of three kinds of shoe speed on die filling process was studied, and the critical filling speed of glass beads was quantitatively studied. The results conclude that when the diameter of glass beads is less than 0.37 mm, the flow behavior of glass beads is affected by air; when the diameter of glass beads is 1.99 mm, the air sensitive index is very large, and the flow behavior of glass beads is almost unaffected by air; when the speed of feeding shoe is 200 or 400 mm/s, the flow behavior of glass beads is stable, and Hopper flow is dominant; while the speed of feeding shoe is 1 000 mm/s, the flow behavior of glass beads is not very stable, and Bulk flow is dominant; the critical filling speed of glass beads is 270.7 mm/s and the exponent n is 1.040 8.

Keywords: spherical glass beans; die filling; flow characteristics; air sensitive index; feeding shoe velocity; critical filling speed

中图分类号：TB44                               文献标志码：A

文章编号：1008-5548(2019)06-0032-06

DOI:10.13732/j.issn.1008-5548.2019.06.006

收稿日期： 2019-08-29， 修回日期：2019-09-04，在线出版时间：2019-09-29 16:32。

基金项目：国家自然科学基金项目，编号： 51605192；山东省重点研发计划项目，编号：2017GGX203001；山东省中青年科学家科研奖励基金项目，编号：BS2015NJ009。

第一作者简介：钟文镇(1981—)，男，博士，讲师，硕士生导师，研究方向为粉末冶金技术、气固两相流动。E-mail：me_zhongwz@ujn.edu.cn。