Experimental and Statistical Study on Magnetic-Field Assisted Finishing of Mold Steel Using Nano-Scale Solid Lubricant and Abrasive Particles

Abstract

Magnetic field-assisted finishing (MAF) is a surface quality enhancing process that utilizes a flexible brush composed of ferrous metal and abrasive particles. This paper experimentally and statistically investigates the characteristics of a MAF process with nano-scale solid lubricant. A new MAF tool was developed by integrating iron and abrasive particles, and nano-scale solid lubricant. In this experiment, the optical microscopic images of the surface are obtained to measure the surface roughness resulting from MAF processes with varying the content of abrasive particles and the presence of nano-scale solid lubricant. Furthermore, spatial statistics techniques are used to quantitatively evaluate the quality of the surface resulting from each combination of MAF parameters. It is demonstrated that the size and type of abrasive particles mainly affect MAF process and the newly developed MAF tool with nano-scale solid lubricant can improve the final surface quality.

Pós-processamento de peças metálicas produzidas por manufatura aditiva

“…Pode-se citar também o efeito da presença de elementos aditivos para formação da pasta abrasiva e, consequentemente, lubrificação da região de contato. No artigo preliminar de Lee et al (2018), os autores utilizaram lubrificante sólido (hexagonal boron nitride -hBN) em nanoescala no slurry e, em alguns casos, a qualidade da superfície foi melhorada, mas em outras ocorreu adesão das partículas abrasivas na amostra. Pode-se concluir que vários são os fatores que afetam o desempenho do processo de MAF.…”