A control algorithm in 5-axis simultaneous feed was presented to cut and grind the stone sculpture.By slicing the sculpture in surfaces the nodal points were utilized on the curves,and the elliptic curves in sets were fitted on the sculpture. The control model for relative position between the grinding disc and sculpture was established based on the elliptic curves fitted,which was suitable for 5-axis simultaneous feed in the QSJ reconstructed bridge type stone grinding machine originated in China. The interpolation feed in space moving trace for the grinding disc was realized by using the control algorithm and the elliptic curves were enveloped on the sculpture curves. Both the simulation and the

grinding test show that the automatic grinding control can be realized for complex curve manufacturing on the stone sculpture, and featured with high accuracy, effectiveness and reproducibility.

针对石雕复杂型面的切割与磨削加工，提出五轴联动控制算法。通过分片切割石雕型面,利用切面外廓曲线的型值点进行椭圆拟合,得出雕像的椭圆曲线集合,建立了磨削切片与石雕工件相对位置的五轴联动控制模型。该模型适合于国产QSJ改进型桥式石材磨削切机的五轴联动控制加工，实现了磨削切片的空间运动轨迹的插补进给，能较精确地包络出石雕型面上的椭圆曲线。仿真与实际加工测试证明，该控制算法模型能实现石雕复杂型面的自动化磨切加工控制，具有明显的高精度、高效率、高重复性。

控制算法, 五轴联动, 型面磨削, 计算机数控, 石雕