检验复杂零件和夹具时,经常碰到空间的坐标尺寸。往往由于量具的缺乏,不得不寻求既简捷而又能保证产品质量的检验方法。现举例说明如下。图1a中,角a为D孔中心线与底面T的夹角。需要测量E面同D孔中心线的交点到D_1孔中心线的距离B,以及该点到底面T的距离A。现取一直径为d的圆柱放在图示位置。由该圆柱的圆心O作E面的垂线OH(见图1b),则∠OHG=α。令OG=x,HW=y,不难看出 When testing complex parts and fixtures, often encounter space coordinates size. Often due to the lack of measuring tools, have to seek both simple and can guarantee product quality testing methods. An example is as follows. In FIG. 1a, the angle a is the angle between the center line of the D hole and the bottom surface T. You need to measure the distance between the E-plane and the center of the D-hole to the center of the D-1 hole, and the distance A from this point to the bottom surface. Now take a diameter of the cylinder d on the icon position. From the center of the cylinder O O vertical plane OH (see Figure 1b), then ∠ OHG = α. Let OG = x, HW = y, is easy to see