抄録
In a precision machining of workpiece profile using a machining center (MC), how to choose cutting parameter values for achieving simultaneously high contouring accuracy and high machining efficiency is a very important problem in actual manufacture. Although a lot of efforts have been made, so far there is no effective and convenient method to provide to the field for practical use. From the machining center (MC) user’s point of view, the authors have developed a practical and convenient approach to estimate the trajectory motion error of a cutter path produced by the NC acceleration/deceleration (Acc/Dec) processing and the position servo control for a target MC. In this study, a further examination to the different interpolation types of cutter paths is performed under the different motion conditions has been completed. The comparison results of the estimated cutter path trajectories with the measured ones only not demonstrate the validity of the proposed approach from a wider perspective, but also, some important features of the motion error with respect to different interpolation condition are identified. Moreover, A new reverse compensation principle to improve the cutter path motion accuracy is proposed, which only requires the simulation result of the object cutter path by using the motion parameter values commanded in the NC program and a relatively simple modification based on the simulation result to the NC program. The confirming experiment result has proved the possibility of the principle.
