刀具刀尖处 (刃区 )存在转接圆弧 ,在传统机床上使用时 ,这些圆弧不影响加工精度。而在数控机床上加工时 ,由于工艺的不同和被加工表面的特殊性 ,刀具的这些转接圆弧有可能影响尺寸精度。以使用最广泛的车刀为例 ,分析了刀尖圆弧与加工精度的关系 ,突破传统的一般刀具测量思想 ,给出了新的测量方法 ,并进行了论证 There are adapter arcs at the tool tip (blade area), which do not affect the machining accuracy when used on a conventional machine tool. However, when machining on a CNC machine tool, due to different technological processes and the particularity of the surface to be machined, the arcs of these tools may affect the dimensional accuracy. Taking the most widely used lathe tool as an example, this paper analyzes the relationship between tool nose arc and machining accuracy, breaks through the traditional thinking of general tool measurement, gives a new measuring method and demonstrates