Generating parameters from the NC code needed for defining the optimal tool path

Abstract

CAM packages are able to generate several different tool paths for multi-axis NC machining of one pocket or contour. Using the optimal toolpath a minimum cutting force, the maximum dynamic stability of the process and minimum tool wear are achieved or some other technological requirements are met. To determine the optimum tool path it is necessary to establish analytical dependence between optimization criteria and machining elements that are determined by specific tool path. In the NC program the basic technological, kinematic and geometric data are contained but not the elements that depend on the tool path, such as cutting depth, width of cut and engagement angle of the cutting tool. This paper presents a NC code transformation methodology and generation of tool path parameters necessary for calculating all elements of contour milling machining process.