Study on Centrifugal Barrel Finishing (1st Report)

Charging Ratio of Media

Abstract

The centrifugal barrel finishing is done at various charging ratios of media. The media is made of aramid fiber of meta type containing abrasive grains of SiC in #120 and its shape is cylindrical (2.5mm in diameter and 4mm in length). The workpiece is a cold finished carbon steel bar (S45C in JIS, 32mm in diameter) sliced by 10mm in length and its sliced surfaces are finished in grinding or in sand paper finishing. It is confirmed that the stock removal rate increases with the decrease of charging ratio, and also that the surface roughness and the edge radius of workpiece show the same tendency as the stock removal. The amount of stock removals of workpieces finished in a barrel shows two inflection points. The maximum point appears nearly at 50vol% in charging ratio but the amount becomes larger than the maximum point as the charging ratio becomes less than 20vol%.