Patent ID: 7455570

Claim:
A large part polishing apparatus for projecting an abrasive particle having an elastic material as a core at a predetermined speed as an abrasive, and polishing by colliding the abrasive particle against a surface to be polished of a large part, the apparatus comprising: a recovery tank table on which the large part is adapted to be mounted and which recovers the abrasive particle; a turntable on which the recovery tank table is mounted and rotatably supported while holding the recovery tank table and the large part at a predetermined position and driven by a driving motor; an abrasive feeding unit which feeds the abrasive particle to a predetermined position; a polishing apparatus main body which comprises a polishing head including at least an impeller which is driven by an impeller driving motor and applies rotary energy to the abrasive particle to be supplied from the abrasive feeding unit, the polishing head injecting the abrasive particle from the tangential direction of the impeller toward a surface to be polished of the large part held on the recovery tank table; and an abrasive recovery unit which recovers the abrasive particle injected to the surface to be polished of the large part by the polishing apparatus main body, said abrasive recovery unit comprising the recovery tank table and a conveyer arranged to convey recovered abrasive particle to a predetermined height, and a flexible tube coupled to the conveyer and arranged to feed the recovered abrasive particle into the abrasive feeding unit; wherein the turntable is supported in a horizontal state, and rotated and driven by the driving motor, and the polishing apparatus main body comprises the polishing head which is disposed to a manipulator or a moving unit capable of moving in the horizontal direction and vertical direction so as to swirl in the horizontal direction and swivel.