复杂盒形零件支架的模具设计.doc

江苏大学毕业设计论文PAGE\*MERGEFORMATIV复杂盒形零件支架的模具设计摘要盒形支架零件，圆弧长，圆角多，结构复杂，且板料厚，成形工艺难度大，零件的毛坯展开尺寸的确定和拉深模具结构设计是盒形支架零件成形的关键。首先，正确计算复杂盒形零件支架的毛坯展开尺寸，确定支架零件的拉深成形次数及零件的成形工序，以确定的零件成形工序设计模具。落料模中合理的排样可以提高材料的利用率，针对厚板正确计算冲裁力，以选用合适的压力机型号来满足落料的需要，合适的凸、凹模尺寸及间隙可以得到尺寸、质量好的毛坯件。拉深模是盒形支架零件成形的关键，凸、凹模形状、尺寸、圆角半径和间隙起着决定性的作用，模架结构和毛坯的定位可以提高零件的精度。冲孔模工件的最后的成形工序，选用压力机时要明确所选用的压力是冲四个孔的压力总和，模架结构及凸、凹模设计可以与落料模和拉深模相同，以方便生产制造。使用久里金法则计算毛坯的展开尺寸，全面地分析材料的成形性能，合理地设计落料、拉深、冲孔模具的凸、凹模尺寸、凸、凹模间隙和圆角半径，精确地选择压力机的型号是本文的研究的重点。同时，合理地选择凸、凹模的材料和热处理方法能够大大提高模具的使用寿命。关键词：支架零件毛坯尺寸落料模拉深模冲孔模热处理DesignofDieforcomplexboxsupportpartsAbstractTheformingprocessofboxsupportpartswhichhaslengtharc,lotsofrounded,complexstructure,andthethickplate,isdifficult,andthekeyofboxbracketpartsformingistoensuresizeoftheblankanddesignthedrawingdiestructure.Firstofall,itisnecessarytocalculationblanksizeofcomplexboxsupportparts,determinestheformingtimesofdrawingframepartsandconstitutestheformingprocessofparts,andwecandesigndieaccordingtotheformingprocess.Areasonablelayoutcanimprovetheutilizationratioofmaterialintheblankingdie,itisnecessarytocalculateblankingforcecorrectlyinordertochoosethesuitablepressmachineformeetingtheneedsofblankinginplate.Besides,wecangettheaccuratesizeandgoodqualityblankworkpiece.Thedrawingdieisthekeytoformboxsupportparts,theshape,size,roundradiusandgapofconvexandconcavedie,itcanimprovetheaccuracyofpartswhichhasthegoodframestructureandblankpositioning.Thefinalformingprocessispiercing,whenwechoosethepressmachine,ithastoknowthatthepressisthesumoffourholespress,itisconvenientformanufacturingtochooseframestructureanddesignconvexandconcavediewhichcanbethesameblankingdieordrawingdie.Therefore,itisthefocusofthisresearchwhichusesthelonggoldenrulescalculatingblankaccurately,analysestheformingpropertiesofmaterialscomprehensively,designsconvexandconcavemoldsize,gapbetweenconvexwithconcaveofblankingdie,convexandconcavedieradius,drawingdieandpunchingdiereasonably,andselectsthemodelofpressmachine.Atthesametime,itcangreatlyimprovetheservicelifeofthed