三基发射药单螺杆压伸模具流场仿真及实验验证  

Simulation and Experimental Verification of Flow Field of Single Screw Extrusion Mold Used in Three-Based Gun Propellant

作　　者：刘晶[1,2] 谢中元 王琼林[1,2] 王勇 陈松[1,2] 许灿啟 LIU Jing;XIE Zhongyuan;WANG Qionglin;WANG Yong;CHEN Song;XU Canqi(Xi'an Modern Chemistry Research Institute,Shaanxi Xi'an,710065;State Key Laboratory of Fluorine&Nitrogen Chemicals,Shaanxi Xi'an,710065)

机构地区：[1]西安近代化学研究所,陕西西安710065 [2]氟氮化工资源高效开发与利用国家重点实验室,陕西西安710065

出　　处：《爆破器材》2022年第1期1-8,共8页Explosive Materials

摘　　要：为了实现三基发射药生产工艺中的连续化压伸,同时避免模具内部螺旋状流道造成的三基发射药成型的质量和安全问题,应用ANSYS软件模拟了发射药物料在模具内的挤压过程及模针的受力情况。分析了收缩角、出料方向和模具结构对物料在模具中的温度、模具壁面压力、模针表面受力和物料出料速度分布的影响规律,并通过实验进行了验证。结果表明:模具收缩角越大,模具内压力越大,物料温度也越高,且越容易形成热点,同时模针外表面受到的挤压力和摩擦力也越大,模针越容易出现变形和断裂;竖直挤出过程中,模具壁面压力及模针受力均远大于水平挤出中的相应参数,且容易造成挤出后物料的弯曲;增加多孔板有利于物料在挤出模具中的整流和取向,大幅减少物料的径向流动,降低模针在挤出过程中的受力,且成型质量更好。In order to realize continuous extrusion in the production process of three-based gun propellant and avoid the quality and safety problems of three-based gun propellant caused by the spiral flow channel inside the mold, extrusion process of propellant in extruder mold and the force of die pin were simulated by ANSYS software.Effects of mold shrinkage angles, extrusion direction and mold structure on temperature of materials in mold, mold wall pressure force on surface of die pin, and velocity distribution of material were analyzed. This change rules were verified by experiment. Result shows that, the larger the mold shrinkage angles, the greater the pressure inside the mold, the higher the material temperature, and the easier it is to form hot spots. At the same time, the greater the extrusion force and friction force on die pin, the more prone the die needle is to deformation and fracture. Mold pressure and force on die pin in the vertical extrusion process are much higher than the corresponding parameters in the horizontal extrusion, and it is easy to cause bending after extrusion in vertical extrusion. Addition of a perforated plate is benefit to rectification and orientation of materials in the extrusion mold, greatly reduced redial flow of materials and force on die pin in extrusion process, and mold quality of propellant is better.

关 键 词：单螺杆压伸 流场仿真 三基发射药 连续成型 

分 类 号：TJ55[兵器科学与技术—军事化学与烟火技术] TQ562[化学工程—炸药化工]