The present invention relates to an internal abrasive machine which by rotation of the curved pipe with the abrasive portion coupled to the front end of the rotating shaft is configured as a spring to move the pipe and the inside of the curve can be freely polished.
There is a problem that the conventional abrasive machine will be sealed again after the polishing by some cutting a curved portion when polishing the curve of the pipe Since the axis of rotation is made up in a straight line, the present invention additionally polishing the front end of the rotating shaft in order to address this in the internal grinding machine of the combined pipe, the abrasive is bonded to comprise additional bonding of a metallic material detachably to the adapter by a bolt side after portion, doedoe the front end of the rotary shaft connected to the drive motor coupling side after the adapter, wherein the rotational axis and is configured to compress the metal spring to be movable freely along the internal surface of the pipe, we propose a curved interior of the polishing machine, it characterized in that the pipe bend, even if the gap is tightly squeezed by the high frequency so that it does not happen.
Therefore, the present invention may be it is possible to move freely into the interior of the curve as the pipe constituting the rotary shaft in a compressed spring for polishing the curved pipe in a variety of shapes. In addition, there is an advantage that can be replaced in accordance with a variety of shapes, sizes, materials and parts necessary polishing of roughness used by configured to be removably coupled to a polished tip end of the rotating shaft.