Gives a new method which designs tooth forms of pre-grinding hob according to thepartical demands on hob of gear,and designs a kind of pre-grinding hob used in high-speed trac-tion gears.

• 介绍了一种计算与作图相结合的直齿锥齿轮粗铣刀齿形设计方法,推导了精确计算公式,详述了计算步骤和计算机作图方法,并给出了设计实例。