1. Proposal of the problem The following figure shows a tooling pattern diagram commissioned by an aero-engine company. The main line surface of the model is a non-circular curve. The coordinates of the center of the circle corresponding to the curve with a tangent diameter of φ0.15 mm are given on the drawing, and there are more than 20 coordinates. That is to say, for the convenience of processing, the design directly gives the coordinate point of the wire-cut aluminum wire trajectory (or the design side does not give the profile coordinate point for confidentiality). But this also limits the dead processing conditions, that is, the diameter of the molybdenum wire must
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