介绍了这种无触角剃前齿轮滚刀的切削原理、优化设计数学模型，并通过实例验证了设计效果。
The cutting principle and the optimum design mathematical model of such non-feeler preshaving hob are introduced and effect of the design is validated by its example.
给出了剃前齿轮滚刀修缘尺寸的计算方法和计算公式，并对滚刀齿根的齿间槽宽提出了更为合理的判断原则。
The algorithm and formulas to determine the size of tip relief modification of pre shaving gear hobs are put forward. A principle to determine the lead width of tooth roots is also presented.
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