Abstract
The influences of specific gravity, hardness, surface area and material of workpieces on finishing results are investigated in the dry centrifugal barrel finishing. The media used in experiment is triangular prism of nylon mixed with abrasive grains of aluminum oxide (#320). Its size is 4mm in each side and 4mm in height. The turret rotation speed is fixed at 240rpm and media charging ratio is varied from 20 to 50vol% of barrel capacity. The volume of workpieces is fixed throughout all the experiments. Materials of workpieces are steel, aluminum alloy, brass and titanium alloy. The edge radius increases with the specific gravity of workpiece while the surface roughness is almost independent of it. The relative stock removal, the edge radius and the surface roughness decrease with the increase of the hardness of workpiece. The relative stock removal increases with the surface area of workpiece while the surface roughness and the edge radius are almost fixed with the exception of the surface roughness at a smaller surface area and the edge radius at 20vol%. The influence of material of workpiece on finishing results is a combination of influences of its specific gravity and hardness.
