Mechanical and technological aspects of micro ball end milling with various tool inclinations
Mechanical and technological aspects of micro ball end milling with various tool inclinations
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DOI：
10.1016/j.ijmecsci.2017.10.032
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发表时间：
2017-12-01
影响因子：
7.3
通讯作者：
Mrozek, Krzysztof
中科院分区：
文献类型：
--
作者：
Wojciechowski, Szymon;Mrozek, Krzysztof
本文主要研究硬质合金TOOLOX 44钢微球头端铣的机械性能和工艺性能。实验包括在变齿数进给量和刀具轴倾角条件下进行微铣削试验时振动加速度的测量。下一步涉及动态分析，基于测量信号的统计测量和快速傅立叶变换（FFT）的确定。该阶段还包括基于考虑跳动、可变边缘力和具有刀具轴线倾斜的低径向浸入式铣削运动学的机械模型的微小球头端铣削力的预测。在此基础上，对微球头铣削工艺进行了优化。这个过程是通过过程响应的最小化来进行的，应用基于总期望函数最小化的方法。在最后一阶段，所获得的最佳值的刀具的轴倾角和每齿进给量进行了验证，在微铣削试验，包括测量加工表面粗糙度。研究表明，微球头铣削与最佳选择的工具的轴斜率沿着刀具路径和每齿进给影响铣削振动最小化和表面光洁度的改善。(C)2017爱思唯尔有限公司版权所有
This paper is focused on the evaluation of mechanical and technological aspects of the micro ball end milling of hardened TOOLOX 44 steel. The experiment includes the measurement of acceleration of vibrations during the micro milling tests with variable feed per tooth and tool's axis inclination angle values. The next step involves the analysis of dynamics, based on the determination of measured signals' statistical measures and Fast Fourier Transform (FFT). This stage includes also the prediction of micro ball end milling forces on the basis of mechanistic model considering run out, variable edge forces, and kinematics of low radial immersion milling with tool axis inclination. Subsequently, the optimization of the micro ball end milling process is conducted. This procedure is carried out by the minimization of process responses with, the application of a method based on the minimization of total desirability function. In the last stage, the obtained optimal values of tool's axis inclination angle and feed per tooth are validated during the micro milling tests involving the measurements of machined surface roughness. Research reveals that micro ball end milling with the optimally selected tool's axis slope along the toolpath and feed per tooth affects the minimization of milling vibrations and improvement in surface finish. (C) 2017 Elsevier Ltd. All rights reserved.