[美国]用一种改进型的定位销可以方便且有效地定位住呈角度安装工件的棱角。为了改进这种定位销,从销的中心磨出一个90°的缺口,见图1所示,然后将这个定位销放置在要定位的工件的棱角上,借助于千分表或巡边器,可以确定机床主轴中心线到定位销中心的距离,然后,利用简单的直角三 [United States] An improved dowel pin allows easy and efficient positioning of the angled mounting edges. In order to improve such a dowel pin, a 90 ° notch is ground from the center of the pin, as shown in Figure 1, and then this dowel pin is placed on the corners of the workpiece to be positioned. With the aid of a dial indicator or a line finder, You can determine the distance between the centerline of the machine spindle and the center of the locating pin, and then use a simple right-angled tri