一般要想大量车制淬硬的球形图环和圆球一类的零 件(图1),并使其球形面达到3级精度及7级光洁度,这 在普通车床上是无法完成的。有时我们可以使用专用机 床或是用手动进刀的车球形的专用附件来加工。但是使 用车用机床,有时不一定恰当,而使用手动进刀的附件也 很不方便,并且达不 Generally want a large number of car-hardened ball rings and balls of a class of parts (Figure 1), and the spherical surface to achieve 3-level accuracy and 7-level finish, which is not possible in the ordinary lathe. Sometimes we can use a dedicated machine or a car-shaped tool with a special tool for machining. However, the use of automotive machine tools, sometimes not necessarily appropriate, and the use of manual feed accessories is also very inconvenient, and up