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针对汽车转向装置中的变传动比齿轮机构──非圆齿轮机构，给出了数控插齿机床加工变传动比齿轮副的一种有效方法，并推演出了变传动比齿轮副的有效齿形坐标方程和所用插齿刀的共轭齿形的具体算法．
Aiming at the variable gear ratio gear mechanism in automotive steering gear ─ ─ non-circular gear mechanism, an effective method of machining variable ratio gear pair is given and the effective tooth profile The specific equations of the coordinate equation and the conjugate tooth shape of the gear shaper used.