内燃机与配件www.nrjpj.cn产品分析发动机凸轮轴磨削振纹影响与控制方法贾絮影,张兴法,常雪嵩,刘鲁平,何帅,刘俊杰,马京卫(长城汽车股份有限公司,河北省车用发动机技术创新中心(筹),河北保定071000)摘要:凸轮轴是发动机配气机构的驱动零部件,凸轮的轮廓形状是影响发动机性能的主要因素,其表面质量直接影响气门的运动特性、气门机构的磨损与发动机噪声水平。由于凸轮轮廓属于异形曲面,加工时凸轮表面的磨削力是不断变化的,在加工过程中凸轮、砂轮表面力的变化极易引起振动产生磨削振纹,这是凸轮加工过程中最常见的缺陷之一。本文通过对凸轮表面振纹与发动机NVH表现研究,结合后续试验数据制定振纹测量方法和评判标准,为凸轮轴的生产提供了依据,同时在发动机上避免异响问题。关键词:凸轮轴;磨削振纹;评判标准;异响中图分类号:U464.134+.1文献标识码:A文章编号:1674-957X(2023)09-0037-03InfluenceandControlMethodofEngineCamshaftGrindingChatterMarkJiaXu-ying,ZhangXing-fa,ChangXue-song,LiuLu-ping,HeShuai,LiuJun-jie,MaJing-wei(GreatWallAutomobileCo.,Ltd.,HebeiAutomotiveEngineTechnologyInnovationCenter(tobeestablished),HebeiBaoding071000)Abstract:Thecamshaftisthedrivingpartoftheenginevalvetrain.Thecontourshapeofthecamisthemainfactoraffectingtheengineperformance.Itssurfacequalitydirectlyaffectsthemotioncharacteristicsofthevalve,thewearofthevalvetrainandtheenginenoiselevel.Becausethecamprofilebelongstoaspecial-shapedsur-face,thegrindingforceonthecamsurfaceisconstantlychangingduringmachining.Duringmachining,thechangeofthesurfaceforceofthecamandthegrindingwheelisveryeasytocausevibrationandproducegrindingchattermarks,whichisoneofthemostcommondefectsinthecammachiningprocess.Inthispaper,basedontheresearchonthecamsurfacevibrationpatternandengineNVHperformance,combinedwiththefollow-uptestda-tatodevelopthevibrationpatternmeasurementmethodandevaluationcriteria,whichprovidesabasisforcam-shaftproduction,andatthesametime,toavoidtheproblemofabnormalnoiseontheengine.Keywords:Camshaft;Grindingchattermarks;Evaluationcriteria;Abnormalnoise作者简介:贾絮影(1986—),男,工程师,主要从事发动机设计开发。0引言随着用户对于汽车声品质要求越...
