毛细管电极电液束加工微小凹坑试验研究  

Investigation of Micro-pits in the Micro-electrolyte Jet Machining Process

作　　者：杨培剑[1] 曲宁松[1] 刘壮[1] 李寒松[1] 宋曼[1] 

机构地区：[1]南京航空航天大学江苏省精密与微细制造技术重点实验室.南京210016

出　　处：《机械科学与技术》2010年第10期1291-1296,共6页Mechanical Science and Technology for Aerospace Engineering

基　　金：国家自然科学基金项目(50875129);江苏省基金项目(BK2008394);国家“863”项目(2006AA04Z321)资助

摘　　要：降低发动机的机械损失一直是研究热点。在摩擦副表面加工微坑,作为改善摩擦副表面摩擦学特性,提高润滑耐磨性能的方法已引起了研究者的重视。笔者提出了采用非金属毛细管作为管电极进行电液束加工微小凹坑的工艺方法。对加工过程的电流密度分布进行了有限元分析,并试验研究了电压、电解液浓度、加工时间、加工间隙和电解液压力对凹坑直径和深度的影响,对加工参数进行了优化选择,得到了形状规则、直径80μm,深度25μm左右的微小凹坑。并进行摩擦性能试验,结果表明采用该工艺在摩擦副表面加工微坑阵列可有效提高其耐磨性。Much attention has been paid to the preparation of the micro-pits in the contacting surfaces since it can ameliorate the surface tribological properties and improve the lubrication and wear resisting.In this paper,the micro-pit was machined by using the electrolyte jet machining with Flexible Fused Silica Capillary Tubing.The current density distribution over the workpiece surface is analyzed by finite element method,and the effect of process parameters,such as applied voltage,electrolyte concentration,process time,and inlet electrolyte pressure,on pit size and shape was examined.Micro-pits with diameter of 80 μm and depth of about 25 μm are obtained in the experiment.It is verified that the surface with micro-pits array machined by the present method has a great potential for reducing friction compared to a lapped smooth surface.

关 键 词：电液束加工 毛细管 电流密度 微小凹坑 

分 类 号：TG662[金属学及工艺—金属切削加工及机床]