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5.5 形位公差的选用

5.5 形位公差的选用. 项目及公差值的选择：. 形位公差等级： 形状和位置公差等级分为 12 级， 即 1 ~ 12 级。其中为了适应精密零件的需要，圆度、圆柱度公差值，增加了一个 0 级。. 形位公差值的选用原则与尺 寸公差值的选用原则一样，应在满足零件使用要求的前提下，选取最经济的公差值。. 各公差值之间的关系：. 尺寸公差 > 位置公差 > 形状公差 > 表面粗糙度值.

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5.5 形位公差的选用

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  1. 5.5形位公差的选用 项目及公差值的选择： 形位公差等级： 形状和位置公差等级分为12级， 即1 ~ 12级。其中为了适应精密零件的需要，圆度、圆柱度公差值，增加了一个0级。

  2. 形位公差值的选用原则与尺 寸公差值的选用原则一样，应在满足零件使用要求的前提下，选取最经济的公差值。 各公差值之间的关系： 尺寸公差>位置公差>形状公差>表面粗糙度值

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