Abstract
The magnetic abrasive finishing (MAF) process is an ultra-precision surface finishing process. In order to further improve the finishing efficiency and surface quality, the MAF process using an alternating magnetic field was proposed in the previous research, and it was proven that the alternating magnetic field has advantages compared with the static magnetic field. In order to further develop the process, this study investigated the effect on finishing characteristics when the alternating current waveform is a square wave. The difference between the fluctuation behavior of the magnetic cluster in two alternating magnetic fields (sine wave and square wave) is observed and analyzed. Through analysis, it can be concluded that the use of a square wave can make the magnetic cluster fluctuate faster, and as the size of the magnetic particles decreases, the difference between the magnetic cluster fluctuation speed of the two waveforms is greater. The experimental results show that the surface roughness of SUS304 stainless steel plate improves from 328 nm Ra to 14 nm Ra within 40 min.
Highlights
The corrosion and fatigue failure of machine elements undoubtedly cause huge financial losses.Excellent surface quality can improve the corrosion resistance [1] and fatigue strength [2] of the material to a certain extent
The grinding tool of the magnetic abrasive finishing (MAF) process is the magnetic brush composed of tiny particles combined under the action of the magnetic field [4,5]
It can be seen that the amount of material removal (MR) is the least and the surface quality is the worst at direct current (DC)
Summary
The corrosion and fatigue failure of machine elements undoubtedly cause huge financial losses. Excellent surface quality can improve the corrosion resistance [1] and fatigue strength [2] of the material to a certain extent. For some precision machinery, surface finish is an important factor that is indispensable to perform its functions. Traditional finishing methods to achieve nano-level surface finish usually lead to a significant increase in production costs [3]. The magnetic abrasive finishing (MAF) process is considered to be an effective method to improve the surface finish. The grinding tool of the MAF process is the magnetic brush composed of tiny particles combined under the action of the magnetic field [4,5]. The MAF process realizes the material removal (MR)
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