基于激光制造技术相关理论，设计并制造了激光同轴转动三维运动光束头。分析了三维运动光束头工艺参数对熔覆效果的影响，并讨论了其在工业应用实验中取得的效果。结果表明，该三维运动光束头能绕竖直轴转动和水平轴摆动;在参数一定的条件下，随着光束头摆动角度的增加，熔覆效果越来越不理想，理想的摆动角度为0°～45°;配合送粉头的粉末流聚焦及焦点可调功能，该光束头可以实现曲轴、螺杆、叶片等复杂型面零件的制造和再制造。

According to laser fabrication theory, a new three-dimensional (3D) laser beam coaxial powder feeding system was designed. The effect of technological parameters on laser cladding was analysed, and its function was discussed in industrial application. The results showed that the three-dimensional laser beam coaxial powder feeding system can rotate around vertical axis and can swing horizontal axis; the effect of cladding was in inverse proportion to the swinging angle of head at the certain parameters, then the ideal angle was 0°～45°; three-dimensional laser beam coaxial powder feeding system was used to repair parts especially irregular shape parts, such as crank shaft, screw, vane and so on by focusing powder flow and the function of a djustable focus.