基于铣刀精确建模的刀尖点频响函数预测方法
发布时间：2019-05-08 00:19
【摘要】：为准确地获取铣刀刀尖点频响函数,提出一种基于铣刀精确建模的刀尖点频响函数的预测方法。该方法基于RCSA理论和Timoshenko梁理论,将机床-主轴-刀柄-刀具系统划分为机床-主轴-刀柄-部分刀杆和剩余铣刀两个部分,并将剩余铣刀细分为剩余刀杆、过渡段以及多段刀齿。将铣刀分为对称型铣刀和非对称型铣刀两类,并针对每类铣刀各部分分别进行精确建模。以多把2刃和4刃铣刀为研究对象,进行实验测试,比较本文方法、等效质量法预测的铣刀刀尖点频响函数与实测刀尖点频响函数之间的差异,分析结果表明:该方法比等效质量法具有更高的预测精度,所预测频响函数的固有频率与实测频响函数固有频率的相对误差在5%以内。
[Abstract]:In order to obtain the tip frequency response function of milling cutter accurately, a prediction method of tool tip frequency response function based on accurate modeling of milling cutter is proposed. Based on RCSA theory and Timoshenko beam theory, the machine tool-spindle-tool shank-cutter system is divided into two parts: machine tool-spindle-tool handle-part tool rod and residual milling cutter, and the remaining milling cutter is subdivided into residual cutter rod. Transition section and multi-section cutter teeth. The milling cutters are divided into symmetrical milling cutters and asymmetric milling cutters, and the accurate modeling of each part of each kind of milling cutter is carried out. Taking two-edge and four-edge milling cutters as research objects, experimental tests are carried out to compare the difference between the frequency response function of milling cutter tip point predicted by the equivalent mass method and the measured tool point frequency response function, and the difference between this method and the measured tool point frequency response function is compared with that of the method in this paper. The analysis results show that this method has higher prediction accuracy than the equivalent mass method, and the relative error between the natural frequency of the predicted frequency response function and the natural frequency of the measured frequency response function is less than 5%.
【作者单位】： 上海理工大学机械工程学院;
【基金】：国家自然科学基金(50975179) 上海市教委科研创新项目(11ZZ136) 上海市科委科研计划项目(13160502500) 沪江基金(D14005)
【分类号】：TG714
本文编号：2471478
[Abstract]:In order to obtain the tip frequency response function of milling cutter accurately, a prediction method of tool tip frequency response function based on accurate modeling of milling cutter is proposed. Based on RCSA theory and Timoshenko beam theory, the machine tool-spindle-tool shank-cutter system is divided into two parts: machine tool-spindle-tool handle-part tool rod and residual milling cutter, and the remaining milling cutter is subdivided into residual cutter rod. Transition section and multi-section cutter teeth. The milling cutters are divided into symmetrical milling cutters and asymmetric milling cutters, and the accurate modeling of each part of each kind of milling cutter is carried out. Taking two-edge and four-edge milling cutters as research objects, experimental tests are carried out to compare the difference between the frequency response function of milling cutter tip point predicted by the equivalent mass method and the measured tool point frequency response function, and the difference between this method and the measured tool point frequency response function is compared with that of the method in this paper. The analysis results show that this method has higher prediction accuracy than the equivalent mass method, and the relative error between the natural frequency of the predicted frequency response function and the natural frequency of the measured frequency response function is less than 5%.
【作者单位】： 上海理工大学机械工程学院;
【基金】：国家自然科学基金(50975179) 上海市教委科研创新项目(11ZZ136) 上海市科委科研计划项目(13160502500) 沪江基金(D14005)
【分类号】：TG714
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