中文摘要随着汽车整车对发动机的动力性、经济性、环保性及可靠性的要求越来越严格,活塞已发展成为集轻质高强度新材料、异型外圆复合型面、异型销孔等多项新技术于一体的高技术含量的产品,以保证活塞的耐热性、耐磨性、平稳的导向性和良好的密封功能,减少发动机的摩擦功损失,降低油耗、噪声和排放。为满足以上的功能要求,通常将活塞的外圆设计成异型外圆(中凸变椭圆),即垂直于活塞轴线的横剖面为椭圆或修正椭圆以提高活塞的承载能力,从而提高发动机的升功率,通常将高负荷活塞的销孔设计成微内锥型或正应力曲面型(异型销孔),销孔尺寸精度达IT4级,。活塞作为典型的汽车关键零部件,在切削加工方面具有很强的工艺特点。目前,国内活塞制造行业通常是由通用机床和结合活塞工艺特点的专用设备组成机加工生产线,因此,专用设备就成为活塞切削加工的关键设备,其功能和精度将直接影响最终产品的关键特性的质量指标。关键词:活塞;活塞环;活塞销Abstract:Astheautomobilevehicleenginepower,economy,environmentalprotectionandreliabilityrequirementsofincreasinglystringent,thepistonhasdevelopedintoanewsetoflightweighthighstrengthmaterials,special-positesurface,andspecialpinholeandmanyothernewtechnologiesinonehigh-techproducts,toensurethatthepistonheatresistance,abrasionresistance,steady-orientedandgoodsealingfunction,reducingenginefrictionpowerloss,lowerfuelconsumption,,usuallydesignedascylindricalshapedpistoncylindrical(convexvariableellipse),Thatisperpendiculartothepistonaxisofellipticalcross-sectionisellipticalormodifiedtoincreasethecarryingcapacityofthepistontoraisetheengineuppower,usuallyhighloadpistonpinholeisdesignedtomicro-surfacewithintheconeorthenormalstresstype(shapedpinhole),uracyofIT4grade,,,oolsandprocesseswithaspecialpistonmachiningequipment,positionoftheproductionline,therefore,eakeypistonmachiningequipment,:piston;pistonring;pistonpin目录1活塞连杆组——活塞.....................................................................................................................................................................................................................................................................................................................................................................................................................
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