曲轴加工工艺设计毕业设计(论文)

洛阳理工学院毕业设计（论文）I曲轴加工工艺设计摘要曲轴是发动机中承受冲击载荷、传递动力的重要零件，由于曲轴服役条件恶劣，因此对曲轴材质的选择，毛坯的加工技术、精度、表面粗糙度、热处理和表面强化、动平衡等要求都十分严格，因此要制定合理的加工工艺。首先要根据要求选择合适的毛坯，在加工过程中要选择合理的加工设备及刀具、通用夹具、量具及测量方法，在加工工艺中要进行加工工序设计，加工尺寸计算，零件加工要设计合理的专用夹具。伴随着曲轴加工工艺的发展，加工方法不断改进，加工方法越来越先进，所以设计合理的曲轴加工工艺和装夹的夹具，不但可以提高加工精度，还可以提高生产效率，从而降低生产的成本，以期提高产品的竞争力。关键词：曲轴，工艺，夹具洛阳理工学院毕业设计（论文）IICRANKSHAFTPROCESSINGTECHNOLOGYABSTRACTThecrankshaftistolaunchtobearpoundattocarryalotusanddeliverinthemachinemotiveofimportancespareparts,becauseofthecrankshaftundergomilitaryserviceaconditionbad,sotocrankshaftmaterial,semi-finishedproductprocessingtechnology,accuracy,surfaceroughdegree,hotprocessingandthesurfaceenhance,movebalanceetc.requestallverystrict.Thereforewanttodrawupreasonableofprocessacraft,wantfirstaccordingtorequestchoicereasonableofsemi-finishedproduct,intheprocessofprocessinwanttochoosereasonableofprocessequipmentsandknife,tongs,quantityandmeasuremethod,wanttocarryontoprocessaworkprefacedesigninprocessthecraft,processsize,timesettlesumofcalculation,thesparepartsprocesstowantdesignreasonableofappropriationtongs.Accompanywithcrankshafttoprocessadevelopofcraft,processamethodtonotonlyimprove,processamethodmoreandmoreadvanced,sothecrankshaftofdesignreasonableprocessacraftandpacktoclipoftongs,notonlycanraisetoprocessaccuracy,butalsocanraiseproductionefficiency,thecostforloweringproducethuswithexpectexaltationproductofcompetitionability.KEYWORDS:Crankshaft,Technology,Jig洛阳理工学院毕业设计（论文）III目录前言...........................................................................................................11曲轴的作用........................................................................................12发动机曲轴加工工艺的历史发展演变............................................13曲轴加工工艺现状............................................................................3第1章零件加工工艺设计.........................................................................41.1零件工艺分析.................................................................................41.2零件加工特点及解决方法.............................................................51.2.1零件加工特点.......................................................................51.2.2加工零件采取的措施...........................................................61.3确定毛坯.........................................................................................61.3.1确定毛坯...............................................................................61.3.2确定机械加工余量...............................................................61.4设计毛坯图.....................................................................................81.4.1确定毛坯尺寸公差...............................................................81.4.2确定圆角半径.......................................................................91.4.3确定拔模角度.....................................................................101.4.4确定分模位置.....................................................................101.4.5确定毛坯及毛坯的热处理方式.........................................101.5加工工艺路线拟定.......................................................................101.5.1主要技术要求.....................................................................101.5.2加工方法.............................................................................101.5.3加工顺序的安排.................................................................111.6加工工序设计...............................................................................131.6.1工序20铣侧面及底面.......................................................131.6.2工序40粗主轴颈，工序50精车主轴颈.........................141.7工件中孔的加工...........................................................................151.7.1工件中的孔和螺纹孔的精度和加工步骤.........................151.7.2工序80中钻、铰，攻丝至M12......................................16洛阳理工学院毕业设计（论文）IV第2章热处理工艺设计...........................................................................182.135CrMo热处理的技术要求...........................................................182.2调质工艺与用材分析...................................................................182.2.1调质工艺参数的确定.........................................................182.2.2组织性能的分析.................................................................192.3去应力退火工艺...........................................................................202.4表面处理及用材分析...................................................................212.4.1表面热处理工艺.................................................................212.4.2组织性能的分析.................................................................22第3章夹具设计.......................................................................................253.1夹具设计应该具备的基本要求...................................................253.2连杆颈加工专用夹具计算方法...................................................253.3专用夹具设计...............................................................................273.3.1问题的提出.........................................................................273.3.2确定设计方案.....................................................................273.3.3计算夹紧力......................................................................