基于速度前瞻的数控运动轨迹控制及平滑处理

随着制造技术的不断发展和新材料工艺的应用,制造业数控机床的性能要求越来越高.追求高效率,高精度和高可靠性是数控机床技术发展的一个永恒话题.经前人不懈努力,已取得了一些卓有成效的工作.但在产业化应用方面,需要针对具体的加工需求,尤其是某些特种加工,尚有待于进行深入研究.为此,本文以超快激光加工中的速度规划为研究对象,采用空间圆弧过渡实现程序段间的轨迹转接,保证轨迹的C1连续性,并且算法具有计算简单、技术成熟等特点,使用空间圆可以简洁地描述数控运动轨迹在拐角处的平滑过渡曲线,此外,采用实时前瞻技术,实现平滑且高速的轨迹运动效果.最后,对该算法进行了实际加工的验证,提高了工件的整体加工效率.

Trajectory Control and Smoothing Processing Based on Feed Forecast of NC Machining

With the continuous development of manufacturing technology and the application of new material technology,the manufacturing industry requires higher and higher performance of machine too. The pursuit of high efficiency,high precision and high reliability is an eternal topic in the development of NC machine tool technology. Through the unremitting efforts of predecessors,some fruitful work has been achieved. However,in the application of industrial industrialization,specific processing needs,especially some special processing,need to be further studied. For this reason,this paper takes the feed planning in ultra-fast laser processing as the research object,uses the space arc transition between program segments,guarantees the C1 continuity of the trajectory,and the algorithm has the characteristics of simple calculation and mature technology. Using the space circle,the smooth transition curve of the NC trajectory at the corner can be described concisely. In addition,the real-time forward-looking technology is adopted. It has smooth and high-speed trajectory movement effect,and improves the overall processing efficiency of the workpiece. Finally,the algorithm is validated in practice.