摘要《机械制造工艺学》是机械专业的一门主要专业课，是以研究机械加工工艺技术和夹具设计为主技术学科，具有很强的实践性，要求学习过程中应紧密联系生产实践，同时它又具有很强的综合性。本次毕业设计的课题是CA6140车床法兰盘加工工艺规程及某一工序专用夹具设计，主要内容如下：首先，对零件进行分析，主要是零件作用的分析和工艺分析，通过零件分析可以了解零件的基本情况，而工艺分析可以知道零件的加工表面和加工要求。根据零件图提出的加工要求，确定毛坯的制造形式和尺寸的确定。第二步，进行基面的选择，确定加工过程中的粗基准和精基准。根据选好的基准，制订工艺路线，通常制订两种以上的工艺路线，通过工艺方案的比较与分析，再选择可以使零件的几何形状、尺寸精度及位置精度等技术要求得到合理的保证的一种工序。第三步，根据已经选定的工序路线，确定每一步的切削用量及基本工时，并选择合适的机床和刀具。对于粗加工，还要校核机床功率。最后，设计第三道工序—钻法兰盘孔的夹具。先提出设计问题，再选择定位基准，然后开始切削力、夹紧力的计算和定位误差的分析。然后把设计的过程整理为图纸。通过以上的概述，整个设计基本完成。关键词：法兰盘；加工工艺；夹具设计IAbstract"Mechanicalmanufacturingtechnology"isamajorcourseofmechanicalengineering,studyingmechanicalprocessingtechnologyandfixturedesignisgivenprioritytotechnologysubject,hasastrongpracticality,requirementsinthelearningprocessshouldbecloselycontactwithproductionpractice,atthesametimeithasastrongcomprehensive.ThesubjectofthisgraduationprojectisthatCA6140latheringflangeprocessingtechnologyrulesandspecial-purposejigofacertainprocessaredesigned,themaincontentisasfollows:Firstofall,analyzingthispart,itismainlyanalysisofthefunctionofthepartandcraftanalysistothepart,throughpartanalyzedcanfindoutaboutbasicsituationofpart,andcraftanalyzedmayknowtheprocessingsurfaceofthepartandisitrequiretoprocess.Theprocessingdemandputforwardaccordingtothepartpicture,confirmthemanufactureformoftheblankandsurenessofthesize.Thesecondstep,carryonthechoicethebase,confirmthickdatumandprecisedatumintheprocessingcourse.Accordingtothedatumchosen,makethecraftroute,usuallymakethecraftrouteofmorethantwokinds,withanalyzingthroughthecomparisonofthecraftscheme,andthenchoosingbeabletomakesuchspecificationrequirementsastheprecisionofgeometryform,sizeofthepartandprecisionofposition,etc.getakindofprocessoftherationalassurances.Thethirdstep,accordingtothealreadyselectedprocessroute,confirmforeverystepsofcuttingconsumptionandbasicman-hour,choosesuitablelatheandcutter.Toroughmachining,willcheckthepowerofthelathe.Finally,designthethirdprocess-thejiggettingintotheholeoftheringflange.Putforwardthequestionofdesigningfirst,andthenchoosetoorientthedatum,thenthecalculationthatbeginstocutstrength,clampstrengthandanalysisofthelocalizationerror.Thenputthedesigncourseinorderasthedrawing.Throughthesummaryoftheabove,designandfinishbasicallyentirely.Keywords:Flange;Processthecraft;ThetongsdesignII目录摘要.........................................................................................................................................IAbstract......................................................................................................................................II第1章引言................................................................................................................................11.1概述...........................................................................................................................
