SurfaceTexture(表面粗糙度)

SurfaceTexture(表面粗糙度)ANSIB46.1isusedinUSA(measurementunitsminch(micro.inch))ANSIB46.1应用美国(测量单位为微英寸)ISO1302:1992whichusesNnumbers..ThesearenotincludedinBSENISO1302:2002TheTablebelowprovideequivalentvaluesfortheAverageRoughnessRa,theUSAValuesandtheNnumbers...ISO1302:1992使用N号标识,这些不包括BSENISO1302:：2002,下表提供相当的值,包括平均表面粗糙度Ra,美国值和N标识.mm0.0250.050.10.20.40.81.63.26.312.52550minch124816326312525050010002000N-GradeN1N2N3N4N5N6N7N8N9N10N11N12FinishGroundFinishesSmoothTurnedMediumTurnedRoughMachined表面粗糙度研磨表面精加工中等加工粗加工RulesofThumbforsurfacefinishequivalentofNgradeandRavaluesN级和Ra值的表面粗糙度索引规则•Roughturnedwithvisibletoolmarks(可见刀痕的粗加工)....N10=12.5mm(micro.m)•Smoothmachinedsurface(精加工表面)....N8=3.2mm(micro.m)•Staticmatingsurfaces(ordatums)(静配合表面或数据)....N7=1.6mm(micro.m)•BearingSurfaces(轴承表面)....N6=0.8mm(micro.m)•Finelappedsurfaces(精抛光表面)....N1=0.025mm(micro.m)