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With high-speed CNC machining technology growing, the freedom for high precision machining curve, by micro-arc or line of the part program constitutes a very large, and thus increase the processing of information. Another linear or arc not reflect a true and complete CAD / CAM system from the complexity curve model, thus manufacturing precision from design requirements. In order to be able to better address the high-speed cutting process, the issue of NURBS technology has become one of hot spots. Based on the free-form curves and the need for NC machining, completed the following several aspects : First, using NURBS curves of the free-description, which is based on NURBS curves anti-count algorithm. Secondly, based on the theory of plane frame for a NURBS-order and second-order derivative, such as curvature. And the use of cumulative chord length of NURBS curves obtained on the arc between two points. Fu Lei then use the formula to determine within NURBS curves point coordinates. Third, the theory of plane frame on the basis of We will study the application of second-order Taylor expansion of NURBS curve interpolation. This means that to meet the requirements of precision, and also reducing the amount of information processing, and improve the processing efficiency and quality. Finally, we will use the VC window platform for software design, to be verified. |
