Interchangeability知識資料and知識資料technique知識資料measurement

朽木易折，金石可鏤。千里之行，始于足下。第頁/共頁InterchangeabilityandtechniquemeasurementThiscoursefocusoninterchangeabilityofworkpiecesanditsmanufacturetolerancesinrageofdimensions.Interchangeability'sdefinitionisintheindustriesmanufacture,ifsomepartsofmachinewerebrokenordestroyed,thepickuppartsinsteadofbrokenoneswhichareunnecessarytochooseorrepairorfixcansuitableassembleonmachine,andcansuitrequirementsofmachine.Tolerances:allowanceofvariationquantityofparts'dimensionandgeometricparameter.Parts'interchangeabilityingeometricparametercalledStandardofTolerances.Kindsofinterchangeability:completelyinterchangeabilityandsemi-completelyinterchangeabilitySize:DimensionHoleandshaftBasicdimensionActualdimensionLimitdimensionMMCandMMSLMCandLMSES,es=Maxlimitdimension-basicdimensionEI,ei=MinLimitdimension-BasicdimensionT=Maxlimitdimension-MinlimitdimensionZeroline:lineofbasicdimensionRangeoftolerance:MAX-MINNationalstandardforrangeoftolerance:1.Wideoftolerance(sizeoftolerance);2.Basicdeviation(locationoftolerance)

X=clearance,dimensionofhole-dimensionofshaft=positiveY=interference,dimensionofhole-dimensionofshaft=negativeKindofcombing:clearancecombing(atoh),interferencecombing(ptoz),transitioncombing(js,k,m,n)IT=ISOTolerance,20gradesCombing:basicholesystemclearancecombing(forbasicholesystem,Hisbehindc)transitioncombinginterferencecombingToleranceofshapeandlocationShape：Straightness直線度2.Flatness平面度3.Roundness圓度4.Cylindricity圓柱度5.Lineprofile線輪廓度6.Surfaceprofile面輪廓度Location:Parallelism平行度2.Verticality垂直度3.Inclination傾斜度4.Coaxiality同軸度5.Symmetry對稱度6.Positiondegree位置度7.Circlerunout圓跳躍8.Totalrunout全跳躍Surfaceroughness:Ra=contourcalculateaveragedeviationRz=tenpointaverageofmacroDimensionchainCharacteristics:1.Sealing2.ConditionalityCalculati