The invention discloses a multi-axis curved
surface type numerically-controlled method for
machining a complicated curved surface part. According to the method disclosed by the invention, the axis of a cutter can be arranged according to the directions of
longitude and
latitude normal lines for forming a curved surface, an inclined angle is adjusted to generate a cutter path, and the
machining efficiency and the part
surface smoothness can be improved. The numerically-controlled method can be realized by the following technical scheme: a part is fixed in a rotary center of a five-shaft
machine tool; a curved surface is reconstructed according to the curvature change, the normal line direction of the curved surface and a
machining path; a space change of an axis vector of the cutter is controlled by adjusting the front inclined angle and the side inclined angle of a cutter shaft of a flat-bottom
end mill so that the cutter always keeps that a cutter tip participates in curved surface
cutting in the five-axis continuous
cutting process; a curved
surface projection machining manner is adopted in the
programming process so that the mill can carry out multi-axis linked milling machining according to the curvature change of the curved surface; the axis of the cutter is similar with a relatively small front inclined
angle alpha overlapped to the normal line direction of the cutter path and a side inclined angle is set as 0; the axis of the cutter is kept vertical to the direction of the machining path to implement a five-axis linked machining
numerical control procedure.