To provide a barrel polishing method for effectively performing surface polishing to sufficiently reduce surface roughness on the hollow part inner surface of an engine accessory part.
In the method of barrel-polishing the hollow part inner surface of a hollow engine accessory part W, the engine accessory part W is put in a tank 7 of an exciting device 6 together with mixed abrasive grains 1 obtained by mixing spherical abrasive grains 2 and nonspherical abrasive grains 3, a compound solution and a polishing medium mixed with water, and the tank 7 is excited to rotate the engine accessory part W together with the polishing medium 9 and to lead the polishing medium 9 to the inside of the engine accessory part W at the same time to polish the hollow part inner surface Wd.
TERAUCHI KENTARO
NAKADA TAKESHI
UJIDEN CHEMICAL INDUSTRY CO LT