某自动步枪击发机构参数化分析与优化设计  

The parameterized analysis and optimization design of automatic rifle firing mechanism

作　　者：贾陆阳 景春温 刘万川 吴胜光 李东昊 Jia Luyang;Jing Chunwen;Liu Wanchuan;Wu Shengguang;Li Donghao(Chongqing Jianshe Industry(Group)Co.,Ltd.,Chongqing,400054,China)

机构地区：[1]重庆建设工业(集团)有限责任公司,重庆400054

出　　处：《机械设计与制造工程》2023年第7期11-15,共5页Machine Design and Manufacturing Engineering

摘　　要：为了提高某自动步枪击发机构的可靠性,根据击发机构工作原理,归纳了影响击发机构性能的结构参数。以某自动步枪为研究对象,应用动力学数值仿真技术建立击发机构模型,对击发机构进行参数化分析与优化设计。通过改变击锤簧刚度、阻尼、预压力,弹底与机头弹底窝平面间隙以及击针突出量等变量,以底火变形能最小为优化目标,建立了击发机构优化模型。数值算例结果表明,优化后底火的变形能比优化前减小17%,验证了该方法的可行性。In order to improve the reliability of firing mechanism,the structural parameter affecting the firing mechanism are summarized according to the working principle of the firing mechanism.Taking an automatic rifle as the research object,the firing mechanism model is established by using dynamic numerical simulation technology,and the firing mechanism is analyzed and optimized.By changing the stiffness,damping and pre-pressure of the hammer spring;the plane clearance between the bottom of the projectile and the nose of the projectile;and the protruding amount of the striking needle,the optimization model of the firing mechanism is establish with the minimum deformation energy of the primer as the optimization target.Numerical examples show that the deformation energy of the primer after optimization is reduced by 17%compared with that before optimization,which verifies the feasibility of this method.

关 键 词：自动步枪 击发机构 优化设计 参数化分析 底火变形能 

分 类 号：TJ02[兵器科学与技术—兵器发射理论与技术]