我对于位置度和同轴度的测量不是很明白，请明白人指点一下任何测量图中2个尺寸。 在评价位置度和同轴度时应注意些什么？？ 为什么我评价的要不是0要么大的很 [img]http://bbs.hexagonmetrology.com.cn/1[/img][img]http://bbs.hexagonmetrology.com.cn/2[/img][img]http://bbs.hexagonmetrology.com.cn/3[/img][img]http://bbs.hexagonmetrology.com.cn/4[/img]

还没测量过此类零件

不是吧 你们那都测量什么、

第二个注释的意思就该是：所有加工的圆其相对于A基准的同轴度公差为0.0005,其中基准要素遵守最大实体原则。

那这俩尺寸应该怎么测量啊 ?

看不清图，没下载:-|

红字标注的1号尺寸的位置度，图上没有标注任可理论正确直，应旬问一下设计人员或基他相关人事，这个孔距即2.625 重要否？暂时先将这个尺寸当做理论正确值用吧，测量方法如下： 1、B基准圆柱建第一轴，设X轴，并归Y、Z轴零点。 2、分别将被测两个孔按上、中、下各测三层圆。分别取中间层圆建轴向（设Y轴） 3、分别评价这6个圆的位置度其基准中Y：的理论值按+/- 1.3125给，Z向的理论值为0 。（提醒一下：因这两个被测孔属成组要素，所以B基准的最大实体不能补偿这两个被测孔的位置度公差） 至于同轴度，那就更好测了，就是以分别测量机加工的圆或圆柱相对于A基准同轴度即可其中A基准的最大实体可以对被测要素进行补偿。由于A基准较短，且公差又很严，估计测出来的同轴度会很差了:Z 另外，您的图纸一些细节部分我还是看不清，特别是A基准到底指的是哪里，我看不来。

[attachimg]951[/attachimg] FORMAT/TEXT,OPTIONS, ,HEADINGS,SYMBOLS, ;NOM,TOL,MEAS,DEV,OUTTOL, , LOADPROBE/TAN TIP/T1A90B-90, SHANKIJK=1, 0, 0, 角度=-90 柱体1 =FEAT/CYLINDER,RECT,IN,LEAST_SQR THEO/245.365,306.259,-396.148,-0.9999258,-0.0121786,0.0002798,38.778,15.814 ACTL/245.363,306.26,-396.153,-0.999924,-0.0121813,0.0018867,38.81,15.748 MEAS/CYLINDER,12 HIT/BASIC,NORMAL,253.037,302.277,-415.171,-0.002223,0.2050124,0.9787569,253.04,301.68,-415.098,USE THEO = YES MOVE/圆弧 HIT/BASIC,NORMAL,253.034,303.979,-376.846,-0.0017317,0.1193635,-0.9928491,253.043,303.628,-376.871,USE THEO = YES HIT/BASIC,NORMAL,253.036,325.721,-394.016,0.0120786,-0.9941755,-0.1070939,253.005,325.701,-393.7,USE THEO = YES MOVE/圆弧 HIT/BASIC,NORMAL,253.035,286.889,-396.097,-0.0121793,0.9999226,-0.0025361,253.067,286.889,-396.088,USE THEO = YES HIT/BASIC,NORMAL,246.036,286.897,-396.097,-0.0121793,0.9999226,-0.0025499,246.067,286.898,-396.089,USE THEO = YES HIT/BASIC,NORMAL,246.038,325.62,-396.097,0.0121778,-0.9999226,-0.0025372,246.007,325.62,-396.088,USE THEO = YES HIT/BASIC,NORMAL,246.036,303.769,-415.339,-0.0012599,0.1262409,0.9919988,246.037,303.401,-415.311,USE THEO = YES HIT/BASIC,NORMAL,246.039,303.768,-376.975,-0.001817,0.1263919,-0.9919787,246.049,303.399,-377.002,USE THEO = YES HIT/BASIC,NORMAL,237.679,303.769,-376.943,-0.0017529,0.1211138,-0.9926371,237.689,303.414,-376.968,USE THEO = YES HIT/BASIC,NORMAL,237.681,304.553,-415.423,-0.0007142,0.0815448,0.9966694,237.679,304.315,-415.412,USE THEO = YES HIT/BASIC,NORMAL,237.691,325.488,-395.034,0.0121435,-0.9983409,-0.0562855,237.661,325.482,-394.87,USE THEO = YES HIT/BASIC,NORMAL,237.693,286.825,-397.012,-0.0121548,0.9989727,0.0436565,237.723,286.829,-397.141,USE THEO = YES ENDMEAS/ A1 =ALIGNMENT/START,RECALL:STARTUP,LIST=YES ALIGNMENT/ROTATE,XPLUS,TO,柱体1,ABOUT,ZPLUS ALIGNMENT/TRANS,YAXIS,柱体1 ALIGNMENT/TRANS,ZAXIS,柱体1 ALIGNMENT/END MODE/DCC 圆1 =AUTO/CIRCLE,SHOWALLPARAMS = NO,SHOWHITS = YES THEO/-223.413,-33.619,0.371,-1,0,0,11 ACTL/-223.413,-33.418,0.033,-1,0,0,10.027 TARG/-223.413,-33.619,0.371,-1,0,0 MEAS/CIRCLE HIT/BASIC,-223.413,-33.619,5.871,0,0,-1,-223.414,-33.62,5.041 HIT/BASIC,-223.413,-28.119,0.371,0,-1,0,-223.413,-28.429,0.371 HIT/BASIC,-223.413,-33.619,-5.129,0,0,1,-223.414,-33.62,-4.974 HIT/BASIC,-223.413,-39.119,0.371,0,1,0,-223.415,-38.407,0.371 ENDMEAS/ 圆2 =AUTO/CIRCLE,SHOWALLPARAMS = NO,SHOWHITS = YES THEO/-226.413,-33.619,0.371,-1,0,0,11 ACTL/-226.413,-33.428,0.022,-1,0,0,10.03 TARG/-226.413,-33.619,0.371,-1,0,0 MEAS/CIRCLE HIT/BASIC,-226.413,-33.619,5.871,0,0,-1,-226.413,-33.617,5.026 HIT/BASIC,-226.413,-28.119,0.371,0,-1,0,-226.412,-28.435,0.371 HIT/BASIC,-226.413,-33.619,-5.129,0,0,1,-226.413,-33.616,-4.984 HIT/BASIC,-226.413,-39.119,0.371,0,1,0,-226.414,-38.422,0.37 ENDMEAS/ 圆3 =AUTO/CIRCLE,SHOWALLPARAMS = NO,SHOWHITS = YES THEO/-232.413,-33.619,0.371,-1,0,0,11 ACTL/-232.413,-33.387,0.01,-1,0,0,10.006 TARG/-232.413,-33.619,0.371,-1,0,0 MEAS/CIRCLE HIT/BASIC,-232.413,-33.619,5.871,0,0,-1,-232.414,-33.617,5.034 HIT/BASIC,-232.413,-28.119,0.371,0,-1,0,-232.412,-28.435,0.371 HIT/BASIC,-232.413,-33.619,-5.129,0,0,1,-232.413,-33.617,-5.006 HIT/BASIC,-232.413,-39.119,0.371,0,1,0,-232.414,-38.334,0.371 ENDMEAS/ 圆4 =AUTO/CIRCLE,SHOWALLPARAMS = NO,SHOWHITS = YES THEO/-224.366,33.52,0.815,-1,0,0,11 ACTL/-224.366,33.548,0.535,-1,0,0,9.872 TARG/-224.366,33.52,0.815,-1,0,0 MEAS/CIRCLE HIT/BASIC,-224.366,33.52,6.315,0,0,-1,-224.366,33.52,5.446 HIT/BASIC,-224.366,39.02,0.815,0,-1,0,-224.364,38.491,0.815 HIT/BASIC,-224.366,33.52,-4.685,0,0,1,-224.366,33.519,-4.382 HIT/BASIC,-224.366,28.02,0.815,0,1,0,-224.367,28.606,0.815 ENDMEAS/ 圆5 =AUTO/CIRCLE,SHOWALLPARAMS = NO,SHOWHITS = YES THEO/-228.366,33.52,0.815,-1,0,0,11 ACTL/-228.366,33.489,0.534,-1,0,0,9.878 TARG/-228.366,33.52,0.815,-1,0,0 MEAS/CIRCLE HIT/BASIC,-228.366,33.52,6.315,0,0,-1,-228.365,33.523,5.447 HIT/BASIC,-228.366,39.02,0.815,0,-1,0,-228.364,38.435,0.815 HIT/BASIC,-228.366,33.52,-4.685,0,0,1,-228.365,33.522,-4.385 HIT/BASIC,-228.366,28.02,0.815,0,1,0,-228.366,28.544,0.814 ENDMEAS/ 圆6 =AUTO/CIRCLE,SHOWALLPARAMS = NO,SHOWHITS = YES THEO/-234.366,33.52,0.815,-1,0,0,11 ACTL/-234.366,33.471,0.556,-1,0,0,9.86 TARG/-234.366,33.52,0.815,-1,0,0 MEAS/CIRCLE HIT/BASIC,-234.366,33.52,6.315,0,0,-1,-234.366,33.523,5.469 HIT/BASIC,-234.366,39.02,0.815,0,-1,0,-234.365,38.403,0.815 HIT/BASIC,-234.366,33.52,-4.685,0,0,1,-234.366,33.523,-4.36 HIT/BASIC,-234.366,28.02,0.815,0,1,0,-234.367,28.54,0.814 ENDMEAS/ 直线1 =FEAT/LINE,RECT,UNBND THEO/-226.413,-33.619,0.593,-0.0290766,0.9995772,0 ACTL/-226.413,-33.428,0.278,-0.0291728,0.9995744,0 构造/LINE,最佳拟合,2D,圆2,圆5,, OUTLIER_REMOVAL/OFF,3 FILTER/OFF,WAVELENGTH=0 A2 =ALIGNMENT/START,RECALL:A1,LIST=YES ALIGNMENT/ROTATE,YMINUS,TO,直线1,ABOUT,ZPLUS ALIGNMENT/END DATDEF/FEATURE=直线1,DATUM=A FCF位置1 = 位置度 OF 圆1,圆2,圆3,... FEATCTRLFRAME/SHOWNOMS=NO,SHOWPARAMS=YES,SHOWEXPANDED=YES CADGRAPH=OFF REPORTGRAPH=OFF TEXT=OFF MULT=10.00 OUTPUT=BOTH UNITS=MM COMPOSITE=NO,FIT TO DATUMS=YES,OUTPUT ALIGNMENT=Datum Reference Frame SIZE TOLERANCES/6,直径,11,0.01,0.01 PRIMARY DIMENSION/TRUE POSITION,直径,0.01,MMC,A,<dat>,<dat> SECONDARY DIMENSION/<Dim>,<tol>,<MC>,<PZ>,<len>,<dat>,<dat>,<dat> NOTE/FCF位置1 FEATURES/圆1,圆2,圆3,圆4,圆5,圆6,,

以上是我的程序 你看这样对么？ 的理论值按+/- 1.3125给，Z向的理论值为0 这个好像用不上啊 评价的结果都在0.25MM左右~~~~ 我觉得程序有些地方不对但是又不懂~~~请指点 :-|

忘记说了 工件是水平放置的