石雕, 建模, 型面加工, 计算机数控, 多轴联动控制

The complex surfaces on a sculpture was fitted with elliptic curves in sets based on the surface nodal points and the elliptic fitting algorithm was presented. By controlling the rotating angle of the grinding disc so as to make the effective grinding surface in elliptic trace, the elliptic surfaces on the sculpture were ground in 5-aixs control rapidly and accurately. The control trace in 5-axis movement for the grinding point was designed, and the mathematic model for the multi-axis control was deduced and established and the control mode was also proposed. The actual grinding test indicates that the proposed elliptic fitting algorithm and the mathematic model for the multi-axis control and the control mode are feasible to grind complex surface on stone sculpture automatically.