Design of a General Kinematics Model for Five-axis End Milling

The generalized kinematics model of five-axis end milling is founded by using the mechanism theory on the analysis of five-axis end milling processing.The generalized kinematics model is constructed by combining the generalized five-axis machine tool model and the simplified APT geometric tool model for end milling.The complete analytical equations for NC data for five-axis end milling are obtained through homogeneous coordinate transformation matrix and inverse kinematics.The derived NC code expression is a general form suitable for all kinds of five-axis machine tools with different end mill types.Finally,a postprocessor system written by C++ QT software was developed according to the presented model.The NC simulation software VERICUT is used to verify the feasibility of the developed postprocessor in the paper with various different combinations of the end milling processing,the effectiveness and feasibility of the proposed methodology is demonstrated.