| 摘要 |
PURPOSE:To execute both whetstone polishing and electrolytic polishing process simultaneously in parallel, by arranging a spriral ridge having both conductivity and elasticity on the circular peripheral surface of the tool main body and make a polishing tool provided with an elastic whetstone layer to rotate by itself and revolve on said spiral peripheral surface along the inner periphery of a metal tube. CONSTITUTION:A polishing tool 1 is provided with a spiral ridge 3 having both conductivity and elasticity on the circular peripheral surface of the tool main body 2 made of rigid material and a whetstone layer 4 having elasticity on said peripheral surface. Further, said polishing tool 1 is driven, in its self rotation around the shaft line (b) of the tool main body 2, by the rotational output transmitted from a drive unit 5 actuated by a motor 6 and a speed change output gear 7 and driven in revolution with radius (r) of revolutional orbit around the shaft line (d) of a metal pipe 5 to be polished. Accordingly, not only the conventional polishing utilizing electrolytic fusion but also composite polishing action have been achieved based upon the electrolytic polishing process by means of electrotylic liquid blended with abrasive and mirror face finishing on the inner surface of a metal tube can be carried out properly in a short time. |
