Strictly speaking,theworm surface of the hob must be an involute helicoid which possesses an intersectingcurve in axial plane convex.

 
  • 嚴格地說(shuō),漸開(kāi)線(xiàn)齒輪滾刀的基本蝸桿曲面應是漸開(kāi)線(xiàn)螺旋面,其軸斷面內的截線(xiàn)是一條中凸的曲線(xiàn)。
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