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The design of a cutting head is significant to the performance of a road header machine. To improve design efficiency, based on theories of computer graphics, a design method for cutting head with cutting lines and cutting tools by Non-uniform rational B-spline (Nurbs) is achieved in OpenGL. Formulas of a cutting line are derived. The minimum distance from a tool tip to head surface is calculated in order to exactly determine the location of a foam nozzle. Arrangements of cutting tools are performed. Arrangement and expansion graphs with corresponding location and angle parameters are obtained in order to predict the cutting performance of a cutting head. Researches in this paper offer basis and foundation for the design of a cutting head in a longitudinal road header machine.

Parametric Modeling of Cutting Head in A Road Header Machine based on Nurbs in OpenGL