Abstract
A mathematical model is developed in this paper to represent a short cut for generating NC tool paths in window-frame operation. The paths for face milling of flat convex polygon surfaces are considered. The short cut of the tool path is found to be a function of the cutter radius, the position of the starting point, and the magnitude of the vertex angle at the starting point of the path. Combining the concept of a short cut, the length of tool path will be cut down and the machining will be more efficient. An example and some results are adduced to explain and verify the model.
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