Abstract:Robot milling process is an important developing direction of robot technology, and the automatic tool path generation method is the key step of its implementation. Open Cascade was used as the geometric developing platform, and the improved CC route section line method was used to generate the tool path. By adjusting the distance of constrain faces dynamically, the inhomogeneous problem of traditional CC route section line method of tool path was avoided, and the robot milling precision was improved. Based on the above, a corresponding computer aid design/computer aid manufacture (CAD/CAM) software system was developed. Tool path of rough and finish milling process for free form surfaces were generated through this system. At last, feasibility and accuracy of the tool path method are verified by simulation and experiment on generated tool path.