This paper studies the relief grinding problem of the hob of point contact worm gear drive and puts forward a one-parameter enveloping method to calculate the axial profile of relief grinding wheel.

本文研究了加工经可控曲率修正的蜗轮齿面的滚刀设计问题，建立了相应的数学模型，并应用计算铲磨蜗轮滚刀刃形曲线的单参数包络法，求出铲磨砂轮截形曲线。

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The content of this research is as follows: Direct modeling for tooth surface of ti worm in ANSYS is difficult for the equations of contact lines being a kind of transcendental function.

主要研究内容如下：由于TI蜗杆齿面上的接触线方程是一种超越函数，直接在有限元分析软件ANSYS中建模比较困难。

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For the involute screw surface enveloped worm indexing CAM mechanisms, the contact area was calculated.

并对渐开线螺旋面包络蜗杆分度凸轮机构的接触域面积进了实例分析计算。

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As soon as the worm makes contact with water, it releases its larvae into the water, and the cycle begins again.

CNN: How fight against Guinea worm was won

When the worm infects a computer it sends out the "lol" message to the user's contact list.

BBC: Skype targeted by 'worm' malware infecting Windows PCs