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JournalofMechanicsEngineeringandAutomation3(2013)632-640
N 塌
Investigationsof3DSurfaceRoughnessCharacteristic’s
Accuracy
MarlsKumermanis,JanisRudzitisandAnitaAvisane
InstituteofMechanicalEngineering,RigaTechnicalUniversity,RigaLV-IO06,Lawia
Received:June5,2013/’Accepted:July5,2013/Published:October25,2013
Abstract:Theexistingsurfaceroughnessstnadardscompriseonlytwodimensions.However,therealroughnessofthesurfaceis3D
rthree.dimensiona1).Roughnessparametersofthe3D surfacearealsoimportantinnaalyzingthemechanicsofcontactsurfaces.
Problemsofmechnaicsofcontactsurfacesarerelatedtoaccuracyof3D surfaceroughnesschraacteristic.Oncofthemostimportant
factorsfor3D characteristicsdeterminationisthenumberofdatapointsper andYaxes.Withnumberofdatapointsweunderstand
itsnumberincut.off length.NumberofdatapointshavesubstantiaIinfluenceontheaccuracyofmeasurementresults,measurlng
timenadsizeofputtIutdatafilefespeciallyalongtheY-axisdirection,wherenumberofdatapointsarenumberofparallelprofiles).
Numberofdatapointsmustbeoptima1.Smallnumberofdatapointsleadtoincorrectresultsandincreasedistributionamplitude,but
too large numberofdatapointsdo notenlragernageoffundamenta1inofmr ation,butsubstna tially increasemeasuring time.
Thereofre,wemustfindoptimalnumberofdatapointspereachsurfaceprocessingmethod.
Keywords:Surfacetopography,roughnessassessmentaccuracy,measurementinstruction.
1.IntrOductiOn contacttypemethods,oneofthemainmeasurement
initialparametersisthenumberofdatapointsalong
W hen measuring the surface topography using
horizontalmeasurementaxesand the datareading
contact type measuring devices the area to be
matrixformedbythem (Fi
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