夹型滚动轴弯曲模具设计

河南机电高等专科学校毕业设计说明书I摘要本论文中设计的模具是单工序弯曲模。属于冲压工艺的一种，但比起冲压模，本套模具突出了弯曲模的特点，而且包括冲压模，文中考虑到工件批量大的特点，选用了经过改进的一种高效率模具，它是能一次成形的回转式压弯模。是组合式的活动凹模，用于弯曲夹角小于90°的U形件，可以一次弯曲成形。此模具具有一对有缺口的转轴凹模，其缺口与工件外形相适应。凹模是转轴式的，左右两件对称。这种形状的凹模制成组合式的，且镶在凹模镶块中，便于机械加工。另外镶块部分容易磨损，这样利于更换又节省材料。当凸模随压力机滑块下降时，首先将坯料在凹模内弯曲成90°的U形件，当凸模继续下降时，将坯件底部压向回转凹模，回转凹模受力转动使坯件进一步弯曲成形。当凸模随压力机滑块回升时，带动回转凹模反向转动，限位钉和轴上的弹簧使回转凹模复位。由于这种结构的弯曲凹模，可以在压力机的一次行程中完成几副简单模具才能完成的弯曲工艺，而模具结构并不复杂，所以，在生产中应用较多。再根据所选材料和厚度及性质经过计算分析完成该模具的毛坯、弯曲力、回弹值、凸、凹模间隙等的设计计算；选出适合该模具的定位方式、卸料出件方式；设计模具的工作部分即凸、凹模的设计，选择模具的材料并确定每个零部件的加工方案；再根据模具的装配原则，完成模具的装配。装配调整好的模具，需要安装到机器上进行试模。如发现不符合要求的需加以修正，并进行再次试模，直到能正常运行并加工出合格的制品。关键词：弯曲工艺，弯曲成形，回转凹模河南机电高等专科学校毕业设计说明书IIAbstractThedesignofthemoldinthispaperisthebendingmodulusofasingleprocess.Belongtoastampingprocess,butcomparedtothestampingdiesetsofmoldshighlightsthecharacteristicsofthebendingdieandstampingmold,inthispaper,weconsidertheworkpiecevolume,thechoiceofahigh-efficiencyimprovedmold,itiscanformingarotarybendingmode.ThecombinedactivitiesofthediefortheU-shapedbendanglelessthan90°,timebendingandforming.Thismoldhasapairofshaftthediegaptoadaptitsgapwiththeworkpieceshape.Thedieistheshaft,abouttwosymmetric.Theshapeoftheconcavemoldmademodular,andinsertinthedieinsert,easeofmachining.Inaddition,theinsertpartiseasytowear,soconducivetochangeandsavematerial．Thedeclineofthepunchwiththepresstheslider,thefirstblankwithinthediebentintoaU-shapedpieceof90°,pressuretoturnthediewhenthepunchcontinuedtodecline,thebottomoftheblank,rotatingthedieforcerotationtheblanksandfurtherbendingandforming.Driverotatingthediewhenthereboundofthepunchwiththepresstheslider,thereverserotationlimitnailandtheaxisofthespringsothattherotationofthediereset.Bendingthedieduetothisstructurecanbecompletedinthepressatourofseveralpairsofsimplemoldtocompletethebendingprocess,themoldstructureisnotcomplicated,somoreinproduction.Thencalculatedaccordingtotheselectedmaterialandthethicknessandnatureoftheanalysisoftherough,bendingforce,springbackvalue,convex,concavemoldgapofthemold;electedforthepositioningofthemold,andunloadingthepiecesoftheway;molddesignpartoftheconvexdesignofthedie,thechoiceofmoldmaterialandtodeterminetheprocessingofeachcomponentprogram;completethemoldassemblyaccordingtothemoldassemblyprinciples.Assemblyadjustedthemoldtryoutneedstobeinstalledonthemachine.Foundtonotmeettherequirementsneedtobeamendedandre-testmode,untilthenormaloperationandprocessingofqualifiedproducts.Keywords:Bending,bending,rotatingthedie河南机电高等专科学校毕业设计说明书III目录摘要...............................................................I1弯曲工艺性分析.......................................................11.1分析零件的冲压工艺性并确定工艺方案...............................11.2弯曲件的工艺性...................................................11.3最小相对弯曲半径的确定...........................................22弯曲件的结构工艺性分析...............................................32.1最小弯曲半径.....................................................32.2弯曲件形状与尺寸的对称性.........................................33弯曲件弯曲工序的安排.................................................43.1弯曲件的工序安排原则.............................................43.2弯曲件的工序安排.................................................44改进零件的结构设计...................................................64.1采用热处理工艺...................................................64.2从模具结构采取措施...............................................64.3弯曲模结构设计应注意的问题：.....................................65弯曲工艺力的计算.....................................................85.1自由弯曲时的弯曲力的计算公式：...................................85.2校正弯曲时的弯曲力.............................................85.3顶件力和压料力.................................................95.4压力机吨位的确定.................................................96毛坯尺寸及回弹量的计算..............................................106.1毛坯尺寸........................................................106.2确定毛坯的尺寸..................................................106.3回弹量的计算....................................................106.4减少回弹的措施：................................................117弯曲模主要工作零件结构参数的确定....................................137.1弯曲凸模和凹模的圆角半径......................................137.2凹模工作部分深度................................................137.3弯曲凹、凸模的间隙..............................................14河南机电高等专科学校毕业设计说明书IV7.4凸、凹模横向尺寸及公差..........................................158模具总体设计........................................................168.1模具主要零部件的设计............................................168.2弯曲设备的选择..................................................188.3选定设备........................................................198.4绘制模具总图....................................................208.5绘制模具非标准零件图............................................219模具总体设计........................................................229.1模具类型的选择：................................................229.2定位方式的选择..................................................229.3卸料﹑出件方式的选择............................................2210模具材料的选用及其他零部件的设计...................................2410.1模具材料的选用...............................