为对失效凸轮进行修复和增强凸轮表面的耐磨、耐蚀、抗压等力学性能, 采用激光熔覆的方法在凸轮表面预涂层。研究了在复杂盘形凸轮表面进行单道激光熔覆的工艺, 提出了在凸轮表面获得均匀熔覆层应满足的基本条件, 并以这些条件为约束推导出复杂盘形凸轮表面激光熔覆运动控制方程。实验试样的宏微观形貌分析表明, 熔覆层宽度和厚度均匀, 熔覆层与基体结合良好。试样的显微硬度明显提高, 凸轮表面的硬度高出基体的2～3倍。

In order to repair broken disc cam and improve the mechanical properties of its surface, such as wear resistance, corrosion resistance, anti-compression,laser cladding coating was made on the surface of disc cam.The laser cladding on complex disc cam was studied .For acquiring the uniform cladding on the surface of disc cam ,some basical conditions which must be followed during the laser cladding on the complex disc cam was put forward. As to meet these condtions, formulas which were used in the moving control of laser cladding on the surface of disc cam were deduced.At last, cladding of disc cam was analyzed by the microscope,scanning electron microscope(SEM) and other equipments,and the experimental results show that the process method provides cladding with uniform width and thickness and solid combination.The hardness of disc cam surface is increased by two-three times.