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1、某汽车发动机汽缸盖机械加工工艺与工装设计某汽车发动机汽缸盖机械加工工艺与工装设计摘要机械的制造工艺过程通常可分为热加工工艺过程(包括铸造、塑性加工、焊接、热处理、表面改性等)及冷加工工艺过程。它们都是改变生产对象的形状、尺寸、相对位置和性质等,使之成为产品或半产品的过程。伴随着机械制造工艺的发展,机床夹具正向着标准化、精密化、高效化和柔性化等方向发展。夹具的主要功能就是完成工件的装夹工作。工件装夹情况的好坏,将直接影响工件的加工质量。本次设计,结合近年来国内外内燃机行业加工的发展的新趋势,以CS492Q汽缸盖为参考
2、对象,对它的机械加工工艺进行了分析和计算,分析了和设计了汽缸盖机械加工生产线工序、关键工艺技术和设备、工艺应用状况及主要优缺点。设计了汽缸盖某一道典型加工工序(钻上底面面和下底面面孔)的夹具。本设计首先分析了汽缸盖零件的作用和加工工艺性,然后进行工艺规程设计,最后是夹具设计。合理安排工艺路线,是保证加工质量和经济性的关键。合理的夹具可以缩短辅助时间,提高劳动生产率,保证加工精度,稳定加工质量,降低对工人的技术要求,扩大机床工艺范围。本文还对所设计的专用夹具进行了精度校核和定位误差分析,对夹具的设计质量也进行了评估。
3、关键词:汽缸盖;工艺分析;工艺规程设计;夹具设计某汽车发动机汽缸盖机械加工工艺与工装设计ThemachiiningprocessandffixtturedesignoftheCylinder--headAbstractThemachiningprocesscangenerallybedividedintotheprocessofhotworking(includingcasting,plasticforming,welding,heattreatment,surfacemodification,etc.)andth
4、eprocessofcoldworking.Theyarealltheprocessesofchangingtheshape,si-ze,relativepositionandpropertyofproductionobjectsformakingthemintoproductsorsemi-products.Withthedevelopmentofmachiningprocess,machinefixtureisdev-elopingtowardthedirectionofstandardization,prec
5、ision,highefficiencyandflexibilit-yetc.Themainfunctionofthefixtureistoclamptheworkpiece.Thequalityofcla-mpingworkpiecewilldirectlyaffectthemanufacturingqualityoftheworkpiece.Inthisdesign,combinedwithinternalcombustionenginesdevelopmentofprocessingindustryathom
6、eandabroadinrecentyears,anewtrendtoCS492Qcylinderheadasareferenceobject,anditsmachiningprocesshasbeenanalyzedandcalculated,analyzedanddesignedaproductionlineofcylinderheadmachiningprocess,Keytechnologyandequipment,processandapplicationstatusandmainadvantagesan
7、ddisadvantages.Roadcylinderheaddesignofatypicalmachiningoperations(drilling,underthebottomsurfaceandbottomfaces)ofthefixture.First,thedesignofthecylinderheadpartoftheroleandprocessingtechnology,andthenproceedtoprocessplanningandfinallythefixturedesign.Routerat
8、ionalizationprocess,toensureprocessingqualityandeconomyofthekey.Reasonableauxiliaryfixturecanreducetime,improveproductivityandensureprecision,stability,processingqualityandreduceth