Research on Tool Axis Vector Optimization Based on Kinematical Constraints

Aiming at the problem of drastic change of the tool axis vector for five-axis CNC machining due to avoid global interference,the forward,gentle over-backward correction transition method was proposed,and the tool axis vector was optimized.A machine tool axis of rotation angular velocity constraints was established,and feed coordinate system was established at the contact of each cutter contact points.Through the feed coordinate system to adjust the inclination and swing angle of tool axis vector,the change of tool axis vector at the adjacent contact of each cutter contact points was made to satisfy the machine axis of rotation kinematics constraints,which ensured the tool path to the rate of progress to continuity.Algorithm simulation and analysis examples show that the proposed method is reasonable and practicable,which can make the tool axis vector changes fairing so as to ensure smooth and efficient processing.