摘要
针对瓶口阀铝合金阀体深盲小孔难加工问题,应用管电极电解加工方法解决该问题。为提高铝合金深盲小孔管电极电解加工稳定性,仿真分析了不同电极进给速度下加工间隙内电场、流场的分布规律;以6061铝合金为对象,使用内径为0.6 mm、外径为1.0 mm的管电极进行电解加工,研究了初始间隙、电极进给速度以及电极旋转对管电极电解加工的影响。仿真和试验结果表明,电极进给速度过大或过小,均不利于铝合金深盲小孔的稳定加工,电极进给速度大于1.4 mm/min时孔底易形成凸起,电极进给速度小于1.0 mm/min时孔底易形成凹坑;初始间隙取0.3 mm能获得质量更好的孔口形貌;电极旋转有利于产物和热量的排出,从而提高加工精度。采用最优参数加工得到了孔间距为2.46 mm、平均直径为1.28 mm的密集孔和平均直径为1.29 mm、深度为50 mm的深盲小孔。
Aiming at the problem of difficult machining on the deep blind small hole of the aluminum alloy body of the cylinder combination valve,electrochemcial drilling method was applied.In order to improve the machining stability of electrochemical drilling of deep blind small holes in aluminum alloy,the distributions regularity of electric field and flow field in the machining gap under different electrode feed rates were simulated and analyzed.In order to study the effects of initial gap,electrode feed rate and electrode rotation on electrochemical drilling,the tube electrode with an inner diameter of 0.6 mm and an outer diameter of 1.0 mm was used for machining aluminum alloy 6061.Simulation and experimental results show that a too large or too small electrode feed rate is not conducive to the machining stability of deep blind small hole drilling.When the electrode feed rate is greater than 1.4 mm/min,the hole bottom is easy to form a protrusion,and when the electrode feed rate is less than 1.0 mm/min,the hole bottom is easy to form pits.The initial gap of 0.3 mm is benificial for the orifice morphology,and the electrode rotation facilitates the discharge of product and heat,thus improving processing accuracy.A hole array with the center distance of 2.46 mm and the averaged diameter of 1.28 mm was fabricated by using optimal parameters,and a deep blind small hole with the averaged diameter of 1.29 mm and the depth of 50 mm was obtained.
作者
余宏兵
李宏洲
周亮
房晓龙
王渭
陈凤官
明友
耿圣陶
叶晓节
YU Hongbing;LI Hongzhou;ZHOU Liang;FANG Xiaolong;WANG Wei;CHEN Fengguan;MING You;GENG Shengtao;YE Xiaojie(Hefei General Machinery Research Institute Co.,Ltd.,Hefei 230031,China;Nanjing University of Aeronautics and Astronautics,Nanjing 210016,China;Shanghai Electro-Mechanical Engineering Institute,Shanghai 201109,China)
出处
《现代制造工程》
CSCD
北大核心
2024年第9期103-109,共7页
Modern Manufacturing Engineering
基金
国家重点研发计划资助项目(2021YFB2500501)
安徽省科技重大专项资助项目(2021d05050007)。
关键词
瓶口阀
管电极电解加工
深盲小孔加工
加工稳定性
加工间隙
电极旋转
cylinder combination valve
electrochemcial drilling
deep blind small hole drilling
machining stability
machining gap
electrode rotation
