钻镗加工用的模板和主轴箱的孔系(即一群有相互位置关系的孔)一般在坐标镗床上加工,也有的因条件所限,在普通镗床或卧式铣床上加工。因此,事先要把孔系的设计位置尺寸(一般是孔距;孔的连心线与水平线或垂直线的夹角;分布圆直径;以及直角坐标等等)换算成从统一基准(例如定位销孔中心)出发的直角坐标尺寸即镗孔工序坐标尺寸。由于机床 Drilling and boring processing template and the spindle box hole system (ie, a group of holes with mutual relations) are generally processed in the coordinate boring machine, and some due to the conditions of the ordinary boring machine or horizontal milling machine processing. Therefore, it is necessary to convert the design dimensions of the hole series (generally the hole pitch; the angle between the concentric lines of the hole and the horizontal or vertical line; the diameter of the distribution circle; and the rectangular coordinates, etc.) Hole center) Cartesian coordinates starting coordinates that boring process size. Thanks to the machine