Application of Permanent Magnets for Chatter Control in End Milling of Titanium Alloy Ti-6Al-4V
Application of Permanent Magnets for Chatter Control in End Milling of Titanium Alloy Ti-6Al-4V
复制标题
永磁体在钛合金Ti-6Al-4V立铣加工中的颤振控制应用
DOI：
10.4028/www.scientific.net/amr.576.15
复制
发表时间：
2012
期刊：
影响因子：
--
通讯作者：
M. Arif
中科院分区：
文献类型：
--
作者：
S. A. Sulaiman;A. Amin;M. Arif
金属的加工通常伴随着工件和刀具之间剧烈的相对振动，称为颤振。颤振是不受欢迎的，因为它对产品质量、操作成本、加工精度、刀具寿命和生产率产生不利影响。本文提出了一种利用铁氧体永磁体来控制钛合金Ti-6Al-4V端铣过程颤振的新方法，以减少不必要的振动。在立式加工中心的主轴上制作并安装了一种特殊的夹具，用于固定永磁棒，用于抑制振动幅度。使用Dasy Lab 5.6进行信号分析和处理，以比较正常和磁力作用下的颤振强度。随后使用快速傅立叶变换(FFT)将振动数据转换为频域的函数。实验重点是对金属切削过程中的振动幅度进行监测和切屑形成过程的分析。观察到磁场有助于减小颤振幅度。显然，颤振幅度的减小将改善工件的表面光洁度，并导致均匀的切屑形成。
Machining of metals is generally accompanied by a violent relative vibration between work and tool, known as chatter. Chatter is undesirable due to its adverse effects on product quality, operation cost, machining accuracy, tool life, and productivity. This paper presents an innovative approach to chatter control during end milling of titanium alloy Ti-6Al-4V using ferrite permanent magnets to reduce the unwanted vibrations. A special fixture was fabricated and mounted on a Vertical Machining Center‘s spindle for holding the permanent magnet bars, used in suppressing the vibration amplitudes. DASY Lab 5.6 was used for signal analysis and processing to compare the intensity of chatter under normal and magnet application conditions. Fast Fourier Transform (FFT) was subsequently used to transform the vibration data to a function of frequency domain. The experiments focused on monitoring the vibration amplitudes and analysis of chip formation process during metal cutting. It was observed that the magnetic fields contributed to reduction of chatter amplitudes. It was apparent that a reduction of chatter amplitude would result in improved surface finish of the work-piece and lead to uniform chip formation.