外文翻译--向5轴计算机数控加工刀具轨迹的实时生成和控制精选.doc

附录A：英文资料 Real-time generation and control of cutter path for 5-axis CNC machining Abstract： This paper presents a new approach to real-time generation and control of the cutter path for 5-axis machining applications. The cutter path generation method comprises real-time algorithms for cutter-contact path interpolation, cutter offsetting, and coordinate conversion. In addition, a global feedback loop is closed by the interpolator so as to augment the controlled accuracy in practical cutter path generation. An error compensation algorithm and a feedrate adaptation algorithm for the control loop are developed, respectively. Keywords：5-axis machining; Cutter path generation; interpolator; Error compensation; Feedrate adaptation 1．Introduction 5-axis computer numerical controlled () machine tools are widely used in machining dies, molds, turbine blades, and aerospace parts. These parts usually have complex geometry and are represented by parametric or free-form surfaces. As compared to 3-axis machining, the 5-axis machining offers many advantages such as higher productivity and better machining quality. In 5-axis machining, the orientation of the tool can be determined by the two additional degrees of freedom so as to obtain efficient cutter paths. To achieve high efficiency and interference-free cutter path planning, many algorithms for determination of the cutter path direction and interval and detection and avoidance of the cutter interference have been developed. Based on these algorithms that are implemented in a computer-aided manufacturing () system, the cutter paths that comprise cutter location and orientation trajectories are determined and represented by a series of linear or spline motion commands. To conduct on-line 5-axis machining, the motion commands generated by the CAM system are loaded to the machine that adopts a real-time interpolator. The interpolator can convert the cutter path to motion trajectories of the five separate axes in order to coor