短电弧-电解复合加工深小孔间隙流固耦合特性研究  

Research on flow-solid coupling characteristics of deep small hole gaps by short electric arc-electrolysis composite machining

作　　者：马昕旸 陈小康 王恪典[2] 周建平[1] MA Xinyang;CHEN Xiaokang;WANG Kedian;ZHOU Jianping(School of Mechanical Engineering,Xinjiang University,Urumqi 830017,CHN;School of Mechanical Engineering,Xi'an Jiaotong University,Xi'an 710000,CHN)

机构地区：[1]新疆大学机械工程学院,新疆乌鲁木齐830017 [2]西安交通大学机械工程学院,陕西西安710000

出　　处：《制造技术与机床》2023年第8期141-145,共5页Manufacturing Technology & Machine Tool

基　　金：航空薄壁零件低压微弧铣削加工放电通道演化规律与变形抑制方法研究(52265061)。

摘　　要：针对深小孔结构加工存在的质量要求高、孔径小、数量多、加工难度大等问题,提出了短电弧-电解复合加工深小孔的方法。短电弧-电解复合加工具有不受材料影响、加工效率高以及表面质量好等优点,但由于深小孔加工阴极柔性大,加工易震颤且电弧放电能量大会引起排屑不畅、短路、二次放电问题。针对上述问题,对短电弧-电解复合加工深小孔间隙流固耦合特性展开研究。从间隙流场角度出发,研究了不同进给速度以及不同加工深度下间隙流场的运动特性,并设计实验验证仿真结果。结果表明:在一定范围内,短电弧-电解复合加工进给速度越快,极间介质平均运动速度越快,颗粒分布越均匀,排屑效果越好,因此通过增加进给速度可以促进排屑,提高短电弧-电解复合加工的稳定性。In view of the problems of high quality requirements,small hole diameter,large number of holes and difficult processing,this paper proposes a short electric arc-electrolysis compound machining method for deep and small holes.Short electric arc-electrolysis machining has the advantages of material-independent,high processing efficiency and good surface quality,but due to the large flexibility of the cathode for deep and small hole machining,the processing is easy to shake and the arc discharge energy can cause poor chip discharge,short circuit and secondary discharge problems.In view of the above problems,this paper investigates the flow-solid coupling characteristics of deep and small holes by short electric arc-electrolysis compound machining.From the perspective of the gap flow field,the motion characteristics of the gap flow field under different feed rates and different machining depths are studied,and experiments are designed to verify the simulation results.The results show that in a certain range,the faster the feeding speed of short electric arc-electrolysis composite machining,the faster the average motion speed of interpolar medium,the more uniform the particle distribution,and the better the chip removal effect,therefore,by increasing the feeding speed can promote chip removal and improve the stability of short electric arc-electrolysis composite machining.

关 键 词：深小孔加工 短电弧-电解复合加工 流固耦合特性 间隙流场 排屑 

分 类 号：TG661[金属学及工艺—金属切削加工及机床]