Based on analysis relationship of which the shifting direction of position datum is or not is to the distance dimensions between process datum and position datum, have researched on method define the sing about plus or minus within the calculating formula
Based on analysis relationship of which the shifting direction of position datum is or not is to the distance dimensions between process datum and position datum, have researched on method define the sing about plus or minus within the calculating formula
由分析机床夹具定位基准的移动方向与工序基准同定位基准间的距离尺寸无关或有关两种情况，探讨确定机床夹具中的定位误差计算式中加、减符号的方法。