A Tool Path Control Algorithm Based on Tool Orientation Vector Interpolation in Five-Axis CNC Machining

Linear interpolation algorithm is employed in five-axis CNC machining systems to realize tool path control in machining, ignoring the problem of interpolation of tool orientation vectors. Several problems, such as large data size, velocity discontinuity, and nonlinear error will therefore be brought out. Aiming at solving problems mentioned above, a tool path control algorithm is proposed. In this algorithm, the tool orientation vector are controlled by plain tool orientation vector interpolation algorithm and are always lying on the demanded machining plain, which will aviod the cause of nonlinear error. Quintic spline is also used for fitting the set of points into a smooth curve in order to avoid problems of heavy data transmission loads and discontinuity of velocity at the junction. Finally, the effectiveness of the algorithm is verified by simulation.