Estimation and experimental validation of cutting forces in ball-end milling of sculptured surfaces
Estimation and experimental validation of cutting forces in ball-end milling of sculptured surfaces
复制标题
雕刻表面球头铣削切削力的估计和实验验证
DOI：
10.1016/j.ijmachtools.2009.07.015
复制
发表时间：
2009-12-01
影响因子：
14
通讯作者：
Jia, Zhenyuan
中科院分区：
文献类型：
--
作者：
Sun, Yuwen;Ren, Fei;Jia, Zhenyuan
在铣削过程中，切屑厚度的计算对伴随切削力的预测精度有着至关重要的影响。本文提出了一种机械方法来估计切削力球头铣削雕塑表面的任何情况下的刀具路径和变化的进给速度，纳入一个新的芯片厚度模型。在给定刀位轨迹和进给速度调度策略的基础上，根据零件与刀具的相对运动，建立了确定未变形切屑面积的切削刃轨迹模型。为保证切屑厚度计算的准确性，文中还对齿顶的选择、齿顶前刀位轨迹的计算等问题进行了详细讨论。在不同切屑厚度下，回归出的切削系数与标定值吻合较好。验证测试进行了雕塑表面上的实际切削条件下的曲线刀具路径。仿真结果与实验结果的对比表明了该方法的有效性。(C)2009爱思唯尔有限公司版权所有。
Chip thickness calculation has a key important effect on the prediction accuracy of accompanied cutting forces in milling process. This paper presents a mechanistic method for estimating cutting force in ball-end milling of sculptured surfaces for any cases of toolpaths and varying feedrate by incorporation into a new chip thickness model. Based on the given cutter location path and feedrate scheduling strategy, the trace modeling of the cutting edge used to determine the undeformed chip area is resulted from the relative part-tool motion in milling. Issues, such as the selection of the tooth tip and the computation of the preceding cutting path for the tooth tip, are also discussed in detail to ensure the accuracy of chip thickness calculation. Under different chip thicknesses cutting coefficients are regressed with good agreements to calibrated values. Validation tests are carried out on a sculptured surface with curved toolpaths under practical cutting conditions. Comparisons of simulated and experimental results show the effectiveness of the proposed method. (C) 2009 Elsevier Ltd. All rights reserved.