| 摘要 |
PURPOSE: A grinder grinding internal diameter of a pipe and a device for grinding the internal diameter using the same are provided to grind while moving along the inner surface where the bent fittings are formed and to automatize the process for grinding the internal diameter. CONSTITUTION: A grinder(10) grinding internal diameter of a pipe comprises a rod(12), a plurality of grinding rings(14), and a head unit(16). The rod has a flexible material and is formed in a rod shape. The grinding rings include a ring shape body(20) and a grinding surface. The grinding rings are connected to the rod and receive a rotational force. The head unit is connected to the end portion of the rod and guides the movement of the grinding rings and the rod along the internal diameter of a component without receiving the rotational force of the rod. |
