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机床空间精度预测与NC代码补偿研究
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四川省科技厅科技创新人才计划项目(2019JDRC0030)


Research on Machine Tool Volumetric Accuracy Prediction and NC Code Compensation
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    摘要:

    以某立式加工中心为研究载体,提出一种空间精度补偿技术。以旋量理论为基础,在充分考虑机床切削点空间位置的基础上,建立包含全部几何误差的立式加工中心空间精度模型,同时输出空间精度显示预测模型。针对传统空间精度补偿不充分的局限性,将空间精度补偿思路转换为NC代码最优化问题,基于遗传算法求解该最优化问题,通过实验验证优化结果的有效性。结果表明:基于旋量理论的机床空间精度建模包含21项几何误差,空间精度预测结果较为准确;基于NC代码最优化的空间精度补偿技术使得机床空间定位精度最大补偿率为90.94%,验证了所提方法的有效性。

    Abstract:

    Taking a vertical machining center as the research carrier, a volumetric accuracy compensation technology was proposed. Based on the screw theory, on the basis of fully considering the spatial position of the machine cutting point, the volumetric accuracy model with all geometric errors was established for vertical machining center, and the volumetric accuracy display prediction model was output. Aiming at the limitation of traditional volumetric accuracy compensation, the idea of volumetric accuracy compensation was transformed into NC code optimization problem, the optimization problem was solved based on genetic algorithm, and the optimization results were verified through the experiment. The results show that the volumetric accuracy modeling of machine tool based on screw theory contains 21 geometric errors, and the volumetric accuracy prediction results are more accurate; the maximum compensation efficiency of machine tool volumetric positioning accuracy is 90.94% based on NC code optimization, by which the effectiveness of the proposed method is verified.

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陈廷兵,敬正彪,李志强.机床空间精度预测与NC代码补偿研究[J].机床与液压,2022,50(18):31-34.
CHEN Tingbing, JING Zhengbiao, LI Zhiqiang. Research on Machine Tool Volumetric Accuracy Prediction and NC Code Compensation[J]. Machine Tool & Hydraulics,2022,50(18):31-34

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  • 在线发布日期: 2023-01-17
  • 出版日期: 2022-09-28