扩展安全区求解孔系坐标尺寸链

Determination of a Coordinate Dimension to a Series of Holes by Expanding the Safe Area

在孔系坐标尺寸换算过程中 ,首先设定孔心距综合公差带安全区 ,并按不同的边界条件对安全区进行扩展 ,最后导出坐标尺寸公差的计算公式。

During the process of exchanging the coordinate dimensions to a series of holes,It′s necessary to set the safe area for composition tolerance zone to the hole′s central distances and expand the area according to different boundary conditions.At last,devived the calculation formula of coordinate dimensions tolerance.