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泡沫铝填充管底吹反挤复合工艺物理模拟实验研究

Physical simulation experimental research on bottom blowing anti-extrusion process of aluminum foam-filled tube
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摘要 为解决泡沫铝填充管短流程近终成形问题,本文结合连铸工艺中间包底吹氩技术与挤压工艺中汇流模具设计理念,提出了一种底吹反挤复合工艺,并且基于相似性原理,自主搭建了成形容腔的等比例物理模拟实验装置和CCD图像采集系统,开展了物理模拟实验研究,分析了气体流量、液体黏度以及汇流模具对气泡群的影响规律。结果表明,有汇流模具时,各工况下成形容腔内侧管壁与汇流模具间无明显气泡存在,并且气泡群分布情况均好于无汇流模具时,可显著改善气体流量较大时气泡群的周期脉动现象,验证了底吹反挤复合工艺的可行性。 To solve the short process forming problem of the aluminum foam-filled materials,a bottom blowing anti-extrusion process is proposed,which combines the bottom argon blowing technology of the tundish in the continuous casting process and the design concept of the confluence mould in extrusion process.An equal scale physical simulation device and a CCD image acquisition system are built up and physical simulation experiments are conducted based on the similarity principle.The influences of gas flow rate,liquid viscosity and confluence mould on bubble population are analyzed.The results indicate that no obvious bubble existed between the inner wall of the forming cavity and the confluence mould when including the confluence mould.The distribution of the bubble population is better than that without the confluence mould,and the periodic fluctuation of bubble population is improved significantly when the gas flow rate is large,by which the feasibility of the bottom blowing anti-extrusion process is verified.
作者 季策 王巍 黄华贵 彭春彦 JI Ce;WANG Wei;HUANG Huagui;PENG Chunyan(National Engineering Research Center for Equipment and Technology of Cold Strip Rolling,Yanshan University,Qinhuangdao,Hebei 066004,China;School of Mechanical Engineering,Yanshan University,Qinhuangdao,Hebei 066004,China)
出处 《燕山大学学报》 CAS 北大核心 2019年第4期306-312,共7页 Journal of Yanshan University
基金 国家自然科学基金资助项目(51474189) 河北省自然科学基金杰出青年基金项目(E2018203446) 河北省研究生创新资助项目(CXZS201803,CXZZBS2019047) 燕山大学博士基金(BL18001)
关键词 泡沫铝填充管 物理模拟实验 吹气发泡 反挤压 汇流模具 aluminum foam-filled tube physical simulation experiment blowing foaming anti-extrusion confluence mould
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