文档介绍：外文出处:《ManufacturingEngineeringandTechnology—Machining》plexstructureofsparepartsbox,itshighprecision,plexprocess,andtheprocessingqualitywillaffecttheoverallperformanceengine,etheenginemanufacturer','sroleissupportingandensuringthepiston,connectingrod,crankshaftandothermovingpartswork,theexactlocation;toensuretheengineventilation,coolingandlubrication;,anditsupperpart4cylindermountinghole;cylinderstandardcylinderisdividedintoupperandlowerdivisionsintotwoparts;cylindertotherearofthefront-:plexshape;processingplane,morethanholes;unevenwallthicknessandstiffnessislow;processingofhighprecisiontypicalofbox-,themainbearingside,cylinderbore,themainandcamshaftbearingboreholesandsoon,uracyoftheengineassemblyprecisionandperformance,mainlyrelyonprecisionequipment,,facilitatethesystematicapplicationofnewscientificandtechnologicalachievementsandadvancedproductionexperience,toensureproductquality,improveworkingconditions,,givefullconsiderationtotheproductioncycle,costandenvironmentalprotection;basedontheenterprisesabilitytoactivelyadoptadvancedprocesstechnologyandequipment,