引言：在机械加工中，我们需要了解一下什么是形位公差，因为在机械加工后零件的实际要素相对于理想要素总有误差，而形位公差则包括了形状公差和位置公差，本文会具体介绍这两种公差。

　　形位公差一般也叫几何公差包括形状公差和位置公差。任何零件都是由点、线、面构成的，这些点、线、面称为要素。机械加工后零件的实际要素相对于理想要素总有误差，包括形状误差和位置误差。这类误差影响机械产品的功能，设计时应规定相应的公差并按规定的标准符号标注在图样上。

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　　形状公差

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　　1、ZHIXIANDU

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　　2、PINGMIANDU

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　　3、YUANDU

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　　4、YUANZHUDU

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　　5、XIANLUNKUODU

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　　6、MIANLUNKUODU

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　　7、PINGXINGDU

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　　位置公差

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