圆球本身就是一个半圆以其直径做轴线的旋转体。圆球铣削头的示意图见图1。 在普通车床上若加工带柄圆球,材料为夹布胶木或有色金属时,用管状专用刀具即可加工(如图2)。而管状专用刀具切削刃的本身,就是以管状专用刀具的轴线为中心、切削刃至轴线距离为半径的一个圆。如果把管 Sphere itself is a semicircle with its diameter axis of rotation. Ball milling head schematic diagram shown in Figure 1. In the ordinary lathe if the handle with a handle ball, the material for the folder bakelite or non-ferrous metals, the use of tubular tools can be processed (Figure 2). The special tubular cutting edge itself, is a special tool for the tubular axis as the center, the cutting edge to the axis of a radius of a circle. If you put the tube