冷镦模具设计介绍.ppt

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1、冷镦工艺介绍-国外资料翻译ContentsoftheTraining培训内容AssemblyandsetupofCOD&COK剪刀/剪模组立Assemblyandsetupofmaindies主模组立Assemblyandsetupofpunches冲头组立/失效分析Understandsteel&carbidetools模具组立/材料/钨钢Understandtoolsurface&friction模具表面/摩擦系数Understandtheeffectofpreform预成形分析10Jan2011AssemblyandsetupofCOD&COK剪刀/剪模组立Ass

2、emblyandsetupofCOD&COK1TypesofShearing剪切类型HalfCutterCOK/CompleteCOD半剪CompleteCOK/CompleteCOD全剪COK:CutOffKnife剪刀COD:CutOffDie剪体AssemblyandsetupofCOD&COKBasicMechanismofShearing剪切基础知识WhatHappenDuringShearing:-剪切过程产生：ElasticDeformation弹性变形Roll-over曲面Plasticshear塑性剪切InitialFracture初始断裂FinalF

3、racture最终断裂PhysicalSeparation实际剪断AssemblyandsetupofCOD&COK2BasicMechanismofShearingQualityProblems:-质量问题OvalShape椭圆形Tilting歪斜Poorshear剪切面粗糙Burr毛刺NotStraight不直ClearanceTooBig间隙太大OptimumClearance最佳间隙ClearanceTooSmall间隙太小ElasticDeformation弹性变形Roll-over曲面Plasticshear塑性剪切InitialFracture初始断裂Fi

4、nalFracture最终断裂PhysicalSeparation实际剪断AssemblyandsetupofCOD&COK2BasicMechanismofShearing(HalfCutCOK)半剪NoControlofBlank落料无法控制DifferentShearPatterns剪切方式不同BlankNotStraight线材不直BigRoll-over曲面较大LowCost成本低廉EasytoSetup安装简易LongToolLife模具寿命较长AssemblyandsetupofCOD&COK2BasicMechanismofShearingNeedRel

5、iefSurfaces需要表面退让（退剪槽〕CarefulControlofClearance间隙要求高DifficultCOK/CODAlignment剪刀、剪体对齐困难BetterShear/Quality较好的剪切质量AchieveStraightBlank剪断的线材较直SmallRoll-over曲面小(CompleteCut全剪)AssemblyandsetupofCOD&COKCommonBlankQualityIssue常见的线材剪切质量问题Roll-over曲面Plasticshear塑性剪切SecondaryFracture/Tongue二次断裂/舌状

6、毛刺Burr毛刺Straightness直线性1443234AssemblyandsetupofCOD&COK4COD&COKSetting安装Relief表面退让（退剪槽〕SmallRadius小圆角Relief表面退让（退剪槽〕AssemblyandsetupofCOD&COK5COD&COKMaterials材料ToolSteel模具钢Carbide钨钢AssemblyandsetupofCOD&COK6MainProcessParameters主要参数MaterialHardness材料硬度COK/CODClearance剪刀/剪体间隙COK/CODDiamet

7、ers剪刀/剪体内孔直径COKSpeed剪刀速度Lubricants润滑TypesofCOK剪刀类型Hardermaterialsneedbiggerclearance,moretoolrelief&higherspeed当剪切较硬的线材时,需要更多的间隙,表面退让(退剪槽)和更快的速度.TooloosetheCOD/COKdiameterswillbendtheblankandcausetaperends剪刀/剪体的内孔直径太大时,会造成线材弯曲,线材末端缩小.Shearingwithoutlubricantscausesshortto