螺栓连接的构造与识图TheConstructionandr.pptx

螺栓连接的构造与识图TheConstructionandrecognitionofboltedconnections

优点施工简单，装拆方便，对安装工的要求高。耐疲劳，易阻止裂纹扩展。摩擦型高强度螺栓连接动力性能好。advantagesTheconstructionissimple,theassemblyanddisassemblyareconvenient,andtherequirementsforinstallersarehighFatigueresistance,easytopreventcrackpropagationFrictiontypehigh-strengthboltconnectionhasgooddynamicperformance.

费料、开孔截面削弱缺点螺栓孔加工精度要求高disadvantagesMaterial,openholesectionweakenedThemachiningaccuracyofboltholesrequireshigh

认识螺栓连接TheRecognizeboltedconnections

螺栓连接普通螺栓高强螺栓A级B级C级按外形分大六角头扭剪型按设计准则分摩擦型承压型普通螺栓六角头高强螺栓认识螺栓连接BoltedconnectionOrdinaryboltsHighstrengthboltsAclassBclassCclassOrdinaryboltsByformfactorAccordingtothedesignguidelinesLargehexagonalheadFrictiontypePressure-bearingtypeTwistedscissortypeHexagonalheadhigh-strengthboltsRecognizeboltedconnections

螺栓性能等级符号螺栓性能等级标号有两部分数字组成，分别表示螺栓材料的公称抗拉强度值和屈强比值。例如，性能等级4.6级的螺栓，其含义是：螺栓材质公称抗拉强度达400MPa级。螺栓材质的屈强比值为0.6。螺栓材质的公称屈服强度达400×0.6=240Mpa认识螺栓连接BoltperformanceclasssymbolTheboltperformancegradedesignationconsistsoftwonumbers,indicatingthenominaltensilestrengthvalueandyieldratiovalueoftheboltmaterial.Forexample，Performanceclass4.6bolts,themeaningofwhichis:Thenominaltensilestrengthoftheboltmaterialreaches400MPaTheyieldratiooftheboltmaterialis0.6Thenominalyieldstrengthoftheboltmaterialreaches400×0.6=240MpaRecognizeboltedconnections

普通螺栓连接基本情况Basicsituationofordinaryboltedconnection

OrdinaryboltstypeRefineboltsRoughboltsPerformancelevelGradesAandBClassCGrade5.6and8.8Levels4.6and4.8ProcessingmethodThelatheismachinedAsinglepartwaspunchedlasttimeMachiningaccuracyClassIhole:thedifferencebetweenthediameteroftheboltholeandthediameteroftheboltrodis0.2~0.5mmClassII.hole:thedifferencebetweenthediameteroftheboltholeandthediameteroftheboltrodis1.0~1.5mmShearresistanceGood

Slippagewillbeproduced,pooruseStructureswith