Two efficient iterative algorithms for error prediction in peripheral milling of thin-walled workpieces considering the in-cutting chip
Two efficient iterative algorithms for error prediction in peripheral milling of thin-walled workpieces considering the in-cutting chip
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DOI：
10.1016/j.ijmachtools.2013.06.001
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发表时间：
2013-10-01
影响因子：
14
通讯作者：
Wang, Zhong-Qi
中科院分区：
文献类型：
--
作者：
Kang, Yong-Gang;Wang, Zhong-Qi
薄壁件周铣加工中，由于切削力的作用，刀具和工件会产生变形，因此曲面形状误差的预测具有很高的复杂性。在系统研究切屑产生机理的基础上，提出了一种适用于低刚性薄壁件周铣加工表面形状误差预测的柔性迭代算法（FIAL）。在FIAL算法中，考虑了前一种收敛切削位置，提出了一种计算刀具/工件（TW）变形的迭代格式，并在该格式中提出了一个新的重要变量A，用于计算以前从未考虑过的径向切削深度。在FIAL算法的基础上，通过对切屑的分析研究，提出了一种双迭代算法（DIAL）来计算最大面形误差的位置和大小，每次迭代都包含最大面形误差的峰值点。数值和实验获得的形状误差和切削力的比较证实了所提出的算法和仿真程序的有效性。实验和分析结果表明，FIAL算法在迭代收敛速度和曲面形状误差预测精度方面均优于刚性迭代算法，DIAL算法在最大误差预测方面也是有效的。(c)2013作者由爱思唯尔有限公司出版。保留所有权利。
Due to the deflection of tool and workpiece induced by cutting force, there is a high complexity associated with the prediction of surface form errors in peripheral milling of thin-walled workpieces. Based on the systematic study of in-cutting chip, this paper proposes a new efficient iterative algorithm named flexible iterative algorithm (FIAL), which is suitable for surface form errors prediction in peripheral milling of low rigid thin-walled workpiece. In FIAL, an iterative scheme for calculations of tool/workpiece (TW) deflections are developed by considering the former convergence cutting position, and in the scheme a new important variable A is proposed for the calculation of radial cutting depth which never been considered before. Based on FIAL and the analytical study of in-cutting chip, a double iterative algorithm (DIAL) is brought forwarded to calculate the positions and magnitude of the maximum surface form errors, which always take the peak point include in each iterative step. Comparisons of the form errors and cutting forces obtained numerically and experimentally confirm the validity of the proposed algorithms and simulation procedure. The experimental and analytical results have shown that FIAL is faster in the iteration convergent speed and more accurate than the rigid iterative algorithm in surface form errors prediction, and DIAL is proved to be valid in the maximum errors prediction. (c) 2013 The Authors. Published by Elsevier Ltd. All rights reserved.