摘要
挤出模具结构决定了发射药孔径、弧厚等一系列参数。药料的粘度和模针的弹性易导致在发射药成型过程中发生模针变形,从而影响发射药产品的尺寸质量。针对模针变形影响发射药产品尺寸、质量的问题,基于流固耦合方法对某多孔发射药的挤出成型过程进行模拟分析。研究模具结构参数对模针变形的影响规律,对现有模具进行正交优化设计。结果表明:成型段长度对模针变形量的影响最大,压缩段高度的影响次之,收缩角的影响最小;模针变形量随收缩角的增大呈递减趋势,随压缩段高度和成型段长度的增加呈递增趋势;优化模具的模针变形量较优化前减小73.3%,效果明显。
The structure of the extrusion die determines a series of parameters such as the diameter of the propellant bore and the arc thickness.The viscosity of the propellant and the elasticity of the mould needle can easily lead to the deformation of the mould needle in the forming process of the propellant,thus affecting the size and quality of the propellant products.Aiming at the problem that the deformation of die pin affects the size and quality of propellant products,the extrusion molding process of a porous propellant was simulated and analyzed based on the fluid-solid coupling method.The influence of die structure parameters on the deformation of the die pin was studied,and the orthogonal optimization design of the existing die was carried out.The results show that the molding section length has the greatest influence on the needle deformation,followed by the compression section height,and the shrinkage angle has the least influence;the needle deformation decreases with the increase of the shrinkage angle,and increases with the increase of the compression section height and the molding section length;the needle deformation of the optimized mold is reduced by 73.3%compared with that before optimization,and the effect is obvious.
作者
季丹丹
毛长勇
马涛
岳显
余海勇
Ji Dandan;Mao Changyong;Ma Tao;Yue Xian;Yu Haiyong(Department of Intelligent Manufacture,Automation Research Institute Co.,Ltd.of China South Industries Group Corporation,Mianyang 621000,China;China North Chemical Research Academy Group Co.,Ltd.,Beijing 100000,China)
出处
《兵工自动化》
北大核心
2025年第8期5-7,33,共4页
Ordnance Industry Automation
关键词
发射药
模具
变形
流固耦合
propellant
mold
deformation
fluid-solid coupling
