Feed scheduling for time-dependent machining processes by optimization of bulk removal and NC blocks
Feed scheduling for time-dependent machining processes by optimization of bulk removal and NC blocks
复制标题
DOI：
10.1016/j.jmatprotec.2022.117786
复制
发表时间：
2022-09
影响因子：
6.3
通讯作者：
Anthony Beaucamp;Yuichi Mizoue;Shuntaro Yamato;B. Sencer
中科院分区：
文献类型：
--
作者：
Anthony Beaucamp;Yuichi Mizoue;Shuntaro Yamato;B. Sencer
与时间相关的过程，如CNC流体喷射抛光，需要通过对目标去除轮廓和刀具影响函数的反卷积来进行进给量调度。在求解该数值问题时，应考虑与机床驱动过程相关的动态约束。本文从空间和时间两个方面研究了材料的大块去除对预定进给速率和加速度的影响，并提出了一种将最大加速度与机床极限精确匹配的方法。在此基础上，利用控制器脉冲响应方法研究了数控插补器动力学特性的影响。然后提出了一种数控块的优化方法，以实现与预期轮廓最匹配的进给速率。体积去除和数控块优化的好处是通过制造，有和没有优化，圆柱形菲涅耳透镜验证。优化后的透镜的形状精度和光学性能都有了很大的提高，表明该优化方法具有很强的工业应用潜力。
Time-dependent processes such as CNC fluid jet polishing require feed-rate scheduling through deconvolution of a target removal profile and tool influence function. The dynamic constraints associated with the machine tool driving the process should be considered when solving this numerical problem. This research investigates how material bulk removal affects the scheduled feed-rate and acceleration both in the spatial and time domain, and proposes a method for matching exactly the maximum acceleration with the machine tool limit. Furthermore, the influence of CNC interpolator dynamics is investigated by means of the controller pulse response method. An optimization method for NC blocks is then proposed in order to achieve feed-rates that best match the intended profile. The benefit of bulk removal and NC blocks optimization is validated by fabrication, with and without optimization, of cylindrical Fresnel lenses. Both the shape accuracy and optical performance of the optimally fabricated lens are shown to substantially improve, suggesting that the proposed optimization method has strong potential for industrial application.