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非圆齿轮，特别是螺旋线形非圆齿轮的切齿加工，在没有专用机床的条件下是非常困难的。本文作者利用计算机设计螺旋非圆齿轮．为了在线切割机床上进行齿形加工，必须计算出非圆齿轮每个齿的渐开线齿廓坐标。本文根据齿轮的啮合原理，找出齿面法线与节圆交点与齿面之间的几何关系，利用这些关系计算出每个点的齿廓坐标，为线切割加工成非圆齿轮创造了加工依据。
Non-circular gear, especially helical non-circular gear cutting gear, in the absence of special machine conditions is very difficult. The author uses a computer to design helical non-circular gears. In order to perform toothed machining on an online cutting machine, the involute profile coordinates of each tooth of the non-circular gear must be calculated. In this paper, according to the principle of gear meshing, find out the geometric relationship between the normal and the pitch circle of tooth surface and the tooth surface, and use these relations to calculate the tooth profile coordinates of each point, and create the processing for wire cutting into non-circular gear in accordance with.