数控机床热误差补偿最佳转速选择

发布时间：2018-05-30 18:03

本文选题：数控机床 + 热误差　；参考：《光学精密工程》2015年11期

【摘要】：为提高数控机床热误差补偿模型在实际工程应用中的补偿精度和稳健性,研究了热误差补偿建模时机床最佳转速状态的选择方法。首先,以Leaderway V-450数控加工中心主轴Z向为研究对象,控制机床主轴在空转状态下,以图谱和恒定转速两种方式进行了多批次实验。然后,采用模糊聚类结合灰色关联度选择温度敏感点并建立多元线性回归模型。最后,分析不同转速类型下模型的预测效果并对同种转速类型下模型预测效果进行相对评价,从而给出热误差补偿建模时机床最佳转速状态的选择方法。实验结果表明,根据国际标准中不同主轴转速类型建立的热误差补偿模型,对于机床热误差预测效果存在较大差异。根据实际工程应用选择的最佳转速状态建立的补偿模型有较好的预测效果。
[Abstract]:In order to improve the accuracy and robustness of the thermal error compensation model of numerical control machine tool in practical engineering application, the method of selecting the optimal rotational speed state of the machine tool for thermal error compensation modeling is studied. Firstly, taking the Z direction of Leaderway V-450 NC machining center as the research object, many batches of experiments were carried out to control the spindle of the machine tool under the condition of idling and two ways of graph and constant rotation speed. Then, the temperature sensitive points are selected by fuzzy clustering and grey correlation degree, and the multivariate linear regression model is established. Finally, the prediction effect of the model under different rotational speed types is analyzed, and the prediction effect of the model under the same speed type is evaluated relatively, thus the method of selecting the optimal rotational speed state of the machine tool when modeling the thermal error compensation is given. The experimental results show that the thermal error compensation model established according to the different spindle speed types in international standard has great difference in predicting the thermal error of machine tools. The compensation model established according to the optimal rotational speed state selected by practical engineering application has good prediction effect.
【作者单位】：合肥工业大学仪器科学与光电工程学院;
【基金】：国家自然科学基金重大项目(No.51490660/51490661);国家自然科学基金资助项目(No.51175142/E051102)
【分类号】：TG659

【参考文献】