In this paper calculating method of lead angle of helicalgear by measuring span length of length bar and base tangent length is put forward and lead angle calculating formula is deducel.
Sophisticated plastic helicalgear parametric modeling process was described in this paper.
阐述了在精密塑料斜齿轮参数化建模过程。
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And the transmission of cross helicalgear can transmit because of their sport of crossing two axles and power widely application neither parallel nor intersect.