几何量公差与测量技术60797

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1、Chapter4Roughness4.1Generaltermsanddefinitionssurfaceprofile:表面轮廓samplinglengthlr:取样长度evaluationlengthln:评价长度profilepeak:轮廓峰profilevalley:轮廓谷ordinatevalueZ(x):纵坐标值profilepeakheightZp:轮廓峰高profilevalleydepthZv:轮廓谷深profileelementwidthXs:轮廓要素宽度4.2Evaluationparameter评定参数Amplitudeparameter

2、s振幅参数ArithmeticalmeandeviationoftheassessedprofileRa:(轮廓算术平均偏差)MaximumheightofprofileRz:(轮廓的最大高度)4.2Evaluationparameter评定参数Spacingparameters空间参数MeanwidthoftheprofileelementsRSm:轮廓要素的平均宽度RSm4.3GraphicalsymbolsfortheindicationofsurfacetextureBasicgraphicalsymbolThebasicgraphicalsymbolin

3、Figureshouldnotbeusedalone(withoutcomplementaryinformation).4.3GraphicalsymbolsfortheindicationofsurfacetextureExpandedgraphicalsymbolsRemovalofmaterialrequired:TheexpandedgraphicalsymbolinFigureshouldnotbeusedalone(withoutcomplementaryinformation).4.3Graphicalsymbolsfortheindicationo

4、fsurfacetextureExpandedgraphicalsymbolsRemovalofmaterialnotpermitted:4.3GraphicalsymbolsfortheindicationofsurfacetextureCompletegraphicalsymbolForuseinthewrittentextof—forexample,reportsorcontracts—thetextualindicationforFigure,a)isAPA1),forb)itisMRR2)andforc)NMR3).Marks:Anyprocessall

5、owed.可采用任意加工过程.Materialremovalrequired.去除材料要求Nomaterialremoved.不去除材料要求.4.4CompositionofcompletegraphicalsymbolforsurfacetextureGeneralItmaybenecessarytosetuprequirementsforseveraldifferentsurfacetextureparametersinorderthatthesurfacerequirementsensureunambiguousfunctionalpropertiesoft

6、hesurface.Inadditionto除…….之外Surfacelay表面纹理Property性质,特性4.4CompositionofcompletegraphicalsymbolforsurfacetextureRulesforcomparisonofthemeasuredvalueswiththetolerancelimitsThe16%-rule:Todesignatetheupperandthelowerlimitsoftheparameter,thesymboloftheparametershallbeusedwithoutthe“max.”in

7、dex.homogeneousa.同类的,相似的parametern.参数4.4CompositionofcompletegraphicalsymbolforsurfacetextureRulesforcomparisonofthemeasuredvalueswiththetolerancelimitsThemax.-ruleTodesignatethemaximumpermissiblevalueoftheparameter,the“max.”indexhastobeaddedtothesymboloftheparameter(forexampleRz1max.

8、).4.4