Study on Post-processing and Nonlinear Error Compensation Technology for Dual 5-axis Linkage NC Machining Center

Abstract

Post-processing is the tie to computer-aided manufacturing (CAM) and digital processing, it is an indispensable part of the digital manufacturing process [1]; Tool paths generated by the automated programming can't be identified by NC machine tools. The message of the tool center coordinates and tool axis vector in the cutter location file need to be converted by post-processing algorithms and programs which are suitable for a particular machine, make it be able to generate the NC program which can be recognized by specific machine [2]; addition to the cutter location file specific tool center coordinates and tool axis vector conversion, excellent post-processing procedures should also get the most of the functional advantages of the processing equipment, reduce field operating time and improve processing quality and efficiency, and so on. For example: the spatial location and the error compensation, tool length compensation, the movement smooth performance and reliability as well as processing different sources cutter location file ,and other functions [3].For a kind of independent research and development HTM50200 special-shaped stone multi-function turning-milling NC machining center, dedicated post-processing algorithm and its programs are studied in this paper, and this dedicated post-processing is utilized to processing the cutter location file of three-dimensional sculpture, make a simulation and processing of its processing results. The correctness and feasibility of the post-processing algorithms and programs is verified by the contrast, detection and analysis of the theoretical model and the actual model, and the machining accuracy is improved by the nonlinear interpolation compensation for B-axis pendulum angle [4]. HTM50200 Structure ProfileHTM50200 special-shaped stone turning-milling NC machining center with movable gantry structure, as shown in Figure 1; eight-axis dual five-linkage machining capability, can achieve processing of complex special-shaped stone products; According to the number of linkage axis, machining center can be divided into four modules, including: 3-axis machining module,