活塞环表面微坑电解加工技术的基础研究  

Foundational Investigation on the Surface of the Piston Ring with Micro-Dimples Array Generating by Electrochemical Micromachining

作　　者：钱双庆[1] 朱荻[1] 曲宁松[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,江苏南京210016

出　　处：《内燃机学报》2010年第2期173-179,共7页Transactions of Csice

基　　金：国家自然科学基金资助项目(50875129);南京航空航天大学科研创新基金资助项目(Y0807-052);江苏省自然科学基金资助项目(BK2008043);国家"863"资助项目(2009AA04Z302)

摘　　要：研究表明摩擦副表面的织构可以有效地改善表面摩擦学性能,提出了采用阴极掩模微细电解方法在活塞环表面加工阵列微坑的加工工艺。试验研究了不同绝缘层厚度和加工电压对曲面微坑尺寸的影响。选用优化的加工参数,进行了曲面微坑电解加工试验,在活塞环表面得到平均直径为250μm,深度为10μm的阵列微坑。参照发动机中活塞环/缸套摩擦副的工作原理,采用该加工方法加工出表面面积率不同,深度不同的多个活塞环试样进行摩擦试验。试验结果表明,与光滑曲面相比,带有适当面积率和深度的阵列微坑的试样表面可以有效地降低摩擦因数,起到抗磨减摩的作用。It is identified that surface texturing can improve tribological property.In this paper,a new electrochemical micromachining,in which the cathode is fixed with the mask,is proposed to generate micro-dimples array on piston ring surface.Effects of the thickness of insulation layer and machining voltage on dimensions of the micro-dimples were investigated experimentally.Using optimized machining parameters,micro-dimples array with 250 μm in diameter and 10 μm in depth is produced on the surface of piston ring.Friction tests,according to contacting between the piston rings and cylinder liner,were carried out for a variety of surface morphologies in which dimples are machined with different density and dimension.Experimental results show that the friction coefficient of the surface with appropriate micro-dimples array is obviously lower than that lapped smooth surface with non-dimples.

关 键 词：活塞环 阵列微坑 微细电解加工(EMM) 加工电压 摩擦因数 

分 类 号：TK406[动力工程及工程热物理—动力机械及工程]