2018 Volume 49 Issue 1 Pages 26-34
In this study, we proposed processing the inner surface of cylinder-like parts with a magnetic compound fluid (MCF). We determined the processing characteristics of material removal and the changes in surface roughness and shape accuracy. The processing tool was a round SUS bar with a permanent magnet inserted in it. Processing was performed by coaxial processing and eccentric processing. In the processing experiments, material removal and surface roughness were found to have peak values as the processing surface shear rate increased. An observation experiment was conducted to clarify the behavior of magnetic clusters during MCF processing. We clarified the shape and distribution of the clusters and the processing speeds at various rotation speeds of the processing tool. The magnetic clusters were found to expand with the existence region in material removal peak. Through the processing speed measurement experiment, it was clarified that the MCF exhibits elastic behavior during processing.
