摘要
为消除航天发动机工作时喷管内壁复合材料因高压燃气作用导致脱落的隐患,提出了一种基于流体动力断弧机制的负极性高速电弧表面粗化技术,研究了峰值电流、脉冲宽度、电极孔径对典型材料电弧粗化的效率和表面质量的影响,同时探究了电弧粗化后工件与复合材料所能承受的最大剪切力。结果表明:电弧粗化不仅能够提高工件的材料去除率,而且通过凸起引入机械连接,大大提高了复合材料与喷管表面的结合能力,从而消除脱落风险,适合在喷管表面粗化中推广应用。
In order to solve the nozzle fault problem caused by falling off trouble of composite material due to high pressure gas during space-engine launching,a negative blasting erosion arc texturing process based on hydrodynamic arc breaking mechanism was proposed.The effects of peak current,pulse width and electrode aperture on the material removal rate and surface quality of blasting erosion arc textured materials were investigated.Meanwhile,the max shear force of workpiece and composite materials after blasting erosion arc texturing was studied.Results showed that arc texturing can not only improve the material removal rate of the workpiece,but also greatly improve the binding ability of composite materials and nozzle surface by introducing mechanical connection bulge.The process effectively eliminate the shedding risk of composite materials from nozzle surface,which is suitable for application in the surface texturing of the nozzle.
作者
刘苏毅
王佳兴
牛禄
顾琳
LIU Suyi;WANG Jiaxing;NIU Lu;GU Lin(State Key Laboratory of Mechanical System and Vibration,School of Mechanical Engineering,Shanghai Jiao Tong University,Shanghai 200240,China;Shanghai Space Propulsion Technology Research Institute,Shanghai 201109,China)
出处
《电加工与模具》
2021年第1期15-20,共6页
Electromachining & Mould
基金
国家自然科学基金资助项目(51975371,51575351)
航天先进技术联合研究中心创新项目(17GFC-JJ08-080)。
关键词
电弧粗化加工
表面质量
工艺性能
抗剪切
blasting erosion arc texturing
surface quality
processing property
anti-shearing
