摘要
为了满足高新武器装备对复杂异型异质结构炸药装药的迫切需求,基于熔融沉积成型技术,利用熔铸炸药高温熔融、低温凝固的性质,设计并研发了熔铸炸药增材制造装置。该装置可实现配方原材料加料、熔融混合、挤出成型全流程的自动化操作,同时还配备有视频/红外在线监测系统,确保打印过程的安全控制。以石蜡、热熔胶、碳酸钙为配方原料,配制出与HMX/TNT基熔铸炸药流变特性相似的代料,验证了增材制造装置的可靠性;通过开展熔铸炸药真料打印试验,成功实现了超细HMX/TNT(HMX固含量为50%)基熔铸炸药打印成型,打印药柱内部密实,无明显缩孔、缺陷;打印样品平均表面粗糙度为6.47μm;打印样品平均密度为1.76 g/cm^(3),达到98.79%TMD;平均抗压强度达33.69 MPa,综合性能优异。
In order to meet the urgent need of high-tech weapon equipment for explosive charges with complex shapes and heterogeneous structures,the additive manufacturing device was designed based on fused deposition modeling technology,the melt-cast explosives could melt at high temperature and solidify at low temperature.The device could automatically operate the whole process of feeding,melt mixing,and extrusion modeling of raw materials.Besides,it was equipped with a video/infrared online monitoring system to ensure safety during printing process.A kind of formula composed of paraffin,hot-melt adhesive,and calcium carbonate was prepared as the substitute for HMX/TNT-based melt cast explosives,and the substitute experiments proved the feasibility of the additive manufacturing device.The melt-cast explosive printing experiment was carried out,and the superfine HMX/TNT(50 wt.%TNT)based melt-cast explosive grains were successfully printed.The printed grains were very dense inside with no obvious shrinkage and defects,the average roughness of the printed grains was 6.47μm,and the average density of the printed grains was 1.76 g/cm^(3),which reached 98.79%TMD.The compressive strength was 33.69 MPa.The test results showed that the printed grains had excellent comprehensive performance.
作者
肖磊
宗胡曾
郭锐
郝嘎子
王苏炜
周昊
郭超
王泽昊
姜炜
XIAO Lei;ZONG Huzeng;GUO Rui;HAO Gazi;WANG Suwei;ZHOU Hao;GUO Chao;WANG Zehao;JIANG Wei(National Special Superfine Powder Engineering Research Center,Nanjing University of Science and Technology,Nanjing 210094,China;School of Mechanical Engineering,Nanjing University of Science and Technology,Nanjing 210094,China)
出处
《新技术新工艺》
2022年第11期18-25,共8页
New Technology & New Process
关键词
含能材料
熔铸炸药
熔融沉积成型
增材制造装置
energetic material
melt-cast explosives
fused deposition modeling(FDM)
additive manufacturing device
