Now instrument circarc gear have been widely used in mechanical timekeeping instrument.As the cutting edge is complicated curve, it is difficult to form.

• 摘要仪表圆弧齿轮被广泛用于机械计时仪器中，当对该种圆弧齿轮进行加工时，由于加工刀具的刃口为复杂曲线，成形较为困难。