摘要
开展了基于多轴联动数控技术的木工雕刻机加工过程的研究,针对雕刻控制系统中多段直线轨迹的速度衔接效率问题,提出了任意多轴联动速度衔接算法。该算法在以当前段和前段速度、加速度、位移等条件为约束的同时,不再将加速度设为常量,而是允许将段间速度变化量独立设置。在此基础上求解每一段的初速度和末速度,并通过多次迭代使前后衔接速度收敛到最优。本算法提高了运动效率并简化了计算,特别适合于步进电机驱动的数控系统雕刻机。最后针对五轴联动木工数控雕刻机实际运动轨迹,与传统速度衔接算法进行了对比,验证了本算法的有效性。
The experiment was conducted to study the machining process based on multi-axis linkage NC wood engraving ma- chine. A velocity connection algorithm of arbitrary multi-axis linkage was presented with regard to the problem of velocity connection efficiency of multiple straight-line paths in the engraving control system. For this algorithm, with the velocity, acceleration and displacement of the current segment and the previous segment as constraint conditions, the acceleration was not set as a constant but the intersegmental velocity variable was set independently. The initial velocity and final veloci- ty of each segment were solved on this basis, improving the movement efficiency and simplifying the calculation. Therefore, this algorithm was particularly suitable for the CNC system engraving mechanism driven by a stepper motor. As for the actu- al motion track of the five-axis linkage NC wood engraving machine, a comparison was made between this algorithm and the traditional velocity connection algorithm to verify the effectiveness of this algorithm.
出处
《东北林业大学学报》
CAS
CSCD
北大核心
2018年第2期77-83,共7页
Journal of Northeast Forestry University
基金
国家级大学生创新训练计划项目(530-41110113)
中央高校基本科研业务费专项资金资助项目(2572016BB11)
关键词
木工雕刻
多轴数控
速度衔接
运动控制
Wood engraving
Multi-axis NC
Feedrate look-ahead algorithm
Motion control
