Non-full-symmetry involute gear and machining method thereof

The invention discloses a non-full-symmetry involute gear and a machining method thereof. The non-full-symmetry involute gear is characterized in that a gear end face tooth groove tooth profile comprises an involute segment AB, an arc-shaped segment BC, a linear segment CD, an arc-shaped segment DE and an involute segment EF, AB and EF are in incomplete symmetry relative to an axis III, the axis III is the angular bisector of a central angle faced by end face tooth groove width, the point A and the point F are respectively the tooth apexes of the left tooth face and right tooth face of the end face tooth groove tooth profile, the point B is the involute starting point of the left tooth face of the end face tooth groove tooth profile, the point E is the involute starting point of the right tooth face of the end face tooth groove tooth profile, the linear segment CD is vertical to the axis III and tangent to a tooth root circle, the arc-shaped segment BC and the linear segment CD are tangent to a straight line I, and the arc-shaped segment DE is tangent to the linear segment CD and a straight line II. The machining method includes: using indexing tooth-by-tooth milling or indexing tooth-by-tooth linear cutting to machine the tooth groove of a to-be-machined part. By the machining method, the left tooth face and the right tooth face can have different tooth root bending strength.