A20B-1000-0850

A20B-1000-0850

（1）尺寸精度

指加工后零件的實際尺寸與零件尺寸的公差帶中心的相符合程度。

（2）形狀精度

指加工后的零件表面的實際幾何形狀與理想的幾何形狀的相符合程度。

（3）位置精度

指加工后零件有關(guān)表面之間的實際位置精度差別。

（4）相互關(guān)系

通常在設(shè)計機器零件及規(guī)定零件加工精度時，應(yīng)注意將形狀誤差控制在位置公差內(nèi)，位置誤差又應(yīng)小于尺寸公差。即精密零件或零件重要表面，其形狀精度要求應(yīng)高于位置精度要求，位置精度要求應(yīng)高于尺寸精度要求。

3 、調(diào)整方法

（1）對工藝系統(tǒng)進行調(diào)整

（2）減小機床誤差

（3）減少傳動鏈傳動誤差

（4）減小刀具磨損

（5）減小工藝系統(tǒng)的受力變形

（6）減小工藝系統(tǒng)熱變形

（7）減少殘余應(yīng)力

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