顺序凝固工艺参数对熔铸装药影响的模拟研究  

Simulation Study on the Effects of the Process Parameters of Sequential Solidification on the Quality of Casting Charge

作　　者：牛凯博 曹红松[1] 刘恒著[1] 史慧芳 王兆国 易茂光 NIU Kai-bo;CAO Hong-song;LIU Heng-zhu;SHI Hui-fang;WANG Zhao-guo;YI Mao-guang(College of Mechatronics Engineering,North University of China,Taiyuan 030051,China;Automation Research Institute Of China South Industries Group Co.,Ltd,Mianyang 621000,China;No.2 Research Institute,Chongqing Hongyu Precision Industry Group Co.,Ltd.,Chongqing 402760,China)

机构地区：[1]中北大学机电工程学院,山西太原030051 [2]中国兵器装备集团自动化研究所有限公司,四川绵阳621000 [3]重庆红宇精密工业集团有限公司研究二所,重庆402760

出　　处：《含能材料》2023年第4期365-373,共9页Chinese Journal of Energetic Materials

基　　金：科技计划项目资助(No.2019⁃JCJQ⁃ZD⁃314)。

摘　　要：顺序凝固工艺在熔铸装药中具有较大的应用需要。为探讨顺序凝固工艺参数对装药的影响,研究基于移动边界的建模方法,选用梯恩梯/黑索今(TNT/RDX,33.8/65)炸药,建立了模具入水顺序凝固过程模型,模拟研究了入水速度(0.15,0.20,0.25 mm·s^(-1))、水浴温度(30,40,50℃)、模具预热温度(60,70,80℃)3个主要参数对凝固过程温度场以及缩孔缺陷的影响,并基于这3个参数设计了三因素正交试验,对模拟所得缩孔体积以及其均值和极差进行了研究,得到了最优的工艺参数:模具入水速度为0.15 mm·s^(-1),水温50℃,模具预热温度60℃。模拟结果显示,入水速度对装药质量影响最大,其次是水浴温度和模具预热温度。相较于试验方案(模具入水速度为0.15 mm·s^(-1),水温50℃,模具预热温度70℃),正交设计的模拟优选方案可将缩孔体积减少74%,表明了相互匹配的工艺参数是提高装药质量的有效方法。Sequential solidification process has a great application prospect in casting explosives.In order to study the correlation between process parameters and charge quality,a simulation study of sequential solidification process was carried out,based on the moving boundary modeling method,where TNT/RDX(33.8/65)was taken as an illustration example.The effects of process parameters,such as water injection speed(0.15,0.20,0.25 mm·s^(-1)),water temperature(30,40,50℃)and preheating temper⁃ature(60,70,80℃),on temperature field and shrinkage defects in the solidification process were studied,based on three⁃factor orthogonal tests,and a optimized process parameter program was obtained.It can be seen that water injection speed has the greatest impact on charge solidification quality,followed by the water temperature and preheating temperature of mold.Compared with experimental program(water injection speed is 0.15 mm·s^(-1),water temperature is 50℃),preheating tempera⁃ture is 70℃),the optimized program of orthogonal tests(water injection speed is 0.15 mm·s^(-1),water temperature is 50℃,pre⁃heating temperature is 60℃)reduces the shrinkage volume by 74%.This implies that the matching of process parameters is an effective method in improving charge solidification quality in the future.The simulation results and experimental design methods in this paper can provide references for process parameter matching optimization of charge solidification.

关 键 词：熔铸装药 顺序凝固 正交试验法 工艺参数 

分 类 号：TJ55[兵器科学与技术—军事化学与烟火技术] O64[理学—物理化学]