Real-time smooth trajectory generation for 3-axis blending tool-paths based on FIR filtering

卷:126

Article

关键词: MACHINE-TOOLS;    INTERPOLATION;   

DOI  :  10.1007/s00170-023-11308-1

来源: SCIE

【 摘 要 】

Three-axis machining tool-paths are generated using computer-aided manufacturing (CAM) systems and programmed by a series of G01 codes mixed with long and short segments. The computer numerical control (CNC) system needs to analyze path information according to the G-codes through path smoothing, speed planning, and interpolation process; generate smooth trajectory; and ensure the high-order continuity of velocity. This study proposes a real-time smooth trajectory generation algorithm with a simple structure and low calculation for 3-axis blending machining tool-paths. Finite impulse response filters are used to generate a smooth trajectory with bounded acceleration in real-time. Due to the delayed response of the filter, it will inevitably bring contour error. The feed rate is adjusted by considering the influence of the adjacent segments on the contour error in the case of long segments. This idea is then extended to continuous micro-segments. Finally, a direct one-step smooth trajectory generation algorithm for the blending tool-paths is realized through pre-discretization with certain rules. The algorithm can effectively control the contour error but also is suitable for blending tool-paths. Consequently, the effectiveness of the proposed algorithms is validated in simulations and also experimented on a 5-axis machine tool.

【 授权许可】

Free