立铣加工系统结合部建模及动态特性预测

发布时间：2018-11-02 20:45

【摘要】：针对立铣加工系统的刀具子结构和刀柄子结构结合部研究了一种两点结合导纳综合动力学模型。采用导纳综合法研究了两点结合模型的刀尖点位移导纳计算公式。利用Ansys软件进行了刀具子结构和刀柄子结构位移导纳分析,导出位移导纳数据。采用Matlab软件编写两点结合导纳综合法程序,获得了刀尖点位移导纳函数。通过Ansys软件建立了刀具子结构和刀柄子结构整体有限元模型,分析获得了刀尖点位移导纳函数。与两点结合导纳综合法分析结果进行比较,并计算两者相对误差,结果表明:在关注频率范围内相对误差最大为0.7%,试验结果与两点结合导纳综合法分析结果具有很好的一致性。
[Abstract]:A two-point combined admittance comprehensive dynamic model is studied for the joint of tool substructure and cutter shank substructure in the end milling system. In this paper, the displacement admittance formula of knife tip is studied by using admittance synthesis method. The displacement admittance analysis of tool substructure and cutter shank substructure is carried out with Ansys software, and the displacement admittance data are derived. The displacement admittance function at the tip of the cutter is obtained by using the program of two points combined with the admittance synthesis method written by Matlab software. The finite element models of tool substructure and tool shank substructure are established by Ansys software, and the displacement admittance function of cutter tip is obtained. The results are compared with the results of two-point combined admittance synthesis method and the relative errors of the two methods are calculated. The results show that the maximum relative error is 0.7 in the range of frequency of concern. The experimental results are in good agreement with the results of two-point combined admittance analysis.
【作者单位】：东北大学机械工程与自动化学院;
【基金】：国家自然科学基金项目(51105067) 教育部基本科研业务费项目(N120403011)
【分类号】：TG54

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