基于激光加工的微安保机构设计与性能  

Design and Performance of Micro Safety and Arming Device Based on Laser Processing

作　　者：章云[1] 姜倩 刘卫[2] 解瑞珍[2] 任小明[2] 刘兰[2] ZHANG Yun;JIANG Qian;LIU Wei;XIE Rui-zhen;REN Xiao-ming;LIU Lan(School of Mechanical and Electrical Engineering,Xidian University,Xi′an 710071,China;Science and Technology on Applied Physical Chemistry Laboratory,Shaanxi Applied Physics and Chemistry Research Institute,Xi′an 710061,China)

机构地区：[1]西安电子科技大学机电工程学院,陕西西安710071 [2]陕西应用物理化学研究所应用物理化学重点实验室,陕西西安710061

出　　处：《含能材料》2024年第1期83-91,共9页Chinese Journal of Energetic Materials

基　　金：陕西省重点研发计划项目(2023‐YBGY‐333);陕西省创新能力支撑计划(2023‐CX‐PT‐30)。

摘　　要：复杂场景下火工品微安保机构需具有可恢复与抗过载特性,为此,研究设计了基于激光加工的金属材质电热驱动微安保机构,采用有限元模拟分析了镍基微电热执行器动作特性,通过调整双热臂U型电热执行器热臂和冷臂的长度、宽度以及各臂之间的间隙,探究它们对输出位移的影响;通过正交实验得到优化的超快激光加工工艺参数分别为频率100 kHz、能量113μJ、切割速度100 mm·s^(-1),实现了镍基电热微安保机构的超快脉冲激光精确制造;最后,搭建了安保机构性能验证平台,验证了该机构在不同电流激励下的驱动位移与隔爆性能。结果表明,在8 A激励电流下,加工的镍基微安保机构驱动位移可达1084μm,所组装的火工品微安保机构在传爆序列中能够有效隔爆。In complex environment,the micro safety and arming(S&A)device of initiating explosive device needs to have recoverable and anti‐overload characteristics.Therefore,this study designed a metal‐based electrothermal‐driven micro S&A device based on laser processing.The finite element simulation was used to analyze the action characteristics of the nickel‐based micro‐electrothermal actuator.By adjusting the length and width of the hot arm and the cold arm of the double‐arm U‐shaped electrothermal actuator and the gap between the arms,the influence of them on the output displacement was explored.Through orthogonal experiments,the optimized ultra‐fast laser processing parameters were obtained as follows:frequency 100 kHz,energy 113μJ,and cutting speed 100 mm·s-1,respectively.The ultra‐fast pulse laser precision manufacturing of nickel‐based electrothermal micro S&A device was realized.Finally,the performance verification platform of the micro S&A device was built,the driving displacement and explosion‐proof performance of the mechanism under different current excitations were verified.The results show that the driving displacement of the processed micro S&A device can reach 1084μm under the excitation current of 8 A,and the assembled micro S&A device of initiating explosive device can effectively isolate the explosion in the explosive se‐quence.

关 键 词：电热驱动 微机电系统(MEMS) 微安保机构 激光加工 

分 类 号：TJ5[兵器科学与技术—军事化学与烟火技术]