喷油嘴微喷孔挤压研磨液及其试验研究  

Extrude Honing Abrasive Slurry and Its Honing Experiments for Fuel Jet Nozzle

作　　者：黄颖[1] 张向军[1] 李勇[1] 李晓民[2] 

机构地区：[1]清华大学摩擦学国家重点实验室,北京100084 [2]山东菏泽华星油泵油嘴有限公司,山东菏泽274000

出　　处：《中国表面工程》2011年第5期68-72,共5页China Surface Engineering

基　　金：国家高技术研究发展计划(863计划)(2007AA04Z346)

摘　　要：挤压研磨工艺已经成为高端柴油机喷油嘴微喷孔加工的最终表面成形的关键工序。根据磨料流加工的原理采用油水乳浊液的方式,配制了具有良好分散性能和切削性能的研磨剂,其磨料颗粒为棕刚玉,粒度范围0.4～50μm,搭建了喷油嘴微喷孔挤压研磨的试验台,测量其流量因数的变化,对喷油嘴微喷孔挤压研磨工艺中的时间、压力因素进行了试验研究。随加工时间增加,研磨效果趋于饱和,随加工压力增加,对设备磨损加剧,试验结果表明,加工时间5min,加工压力10MPa为最佳工艺参数。挤压研磨过程中,造成了喷油嘴微喷孔孔径的扩大,但是不超过2%。The abrasive flow machining has become a key process for the advanced diesel engines to finish the final surface of fuel injector nozzle.Abrasive slurry was compounded by the method of oil-water emulsion.According to the principles of abrasive flow machining,a kind of abrasive slurry with good performance in suspension and cutting was explored and compounded,whose abrasive particles are brown alumina,and particle size range is 0.4~50 μm.In addition,a test-bed was built for extruding honing the fuel injector nozzle.Then,the variations of the flow coefficient were measured and a series of the process parameters involved in the extruding honing technology for the fuel injector nozzle were studied experimentally.The injector nozzles were extruding honed under different times and pressures.With the increase of processing time,the effect was gradually saturated.With the increese of pressure,the wear of the device was serious.Testing results indicated that 5 min and 10 MPa are the best process parameters.The fuel injector nozzles were reamed in the process but didn＇t exceed 2%.

关 键 词：喷油嘴微喷孔 挤压研磨 研磨剂 工艺参数 流量因数 

分 类 号：TK426[动力工程及工程热物理—动力机械及工程]