Sources and measurement of cutting forces are studied to establish the steady-state cutting force prediction model. Modeling of work piece machining error is analyzed

a simplified process coordinate system is established

and the mathematical solving model of machining error within the work piece is given. The cutting force due to work piece bending deformation is studied

a work piece deformation factor error model is established based on steady-state cutting force and the prediction simulation of cutting forces and machining error is achieved.