Abstract: Integrating parts machining feature as well as constraints of various aspects, the right
classification of typical surface groups is obtained by using of Boolean difference calculation. The surface
groups is needed to generate typical process line spectrum for the sake of speeding up process design and
optimization. According to the analysis of dynamic characteristics on the cut-part contact from the
machining of difference three-dimensional process model typical surface groups, the dynamic cutting
force prediction model of complex surface machining based on B-spline curves is used to analyze the
changes of dynamic load, and effective control of cutting load is achieved through the optimization of
cutting parameters. Finally, the turning of a part is carried out as a verification of the feasibility of the
process optimization strategy.

Key words: three-dimensional process model, Boolean difference calculation, process spectrum line;
cutting forces prediction model, process optimization