Vibration finishing method and apparatus for same

摘要: A vibration finishing method and apparatus in which the surface roughness form of a hole compound material such as printed board can be made excellent working accuracy significantly improved cost lowered. In punch pressing device, is fixed to lower metal mold having die into punching tool inserted. While held between plate pressed by members provided with an upper inserted, minute-vibration frequency several ten hertz applied onto then, punched out. After that, temporarily drawn from worked material. The re-inserted while non-vibration or minute again tool.