| 摘要 |
PURPOSE:To achieve finishing of a mirror surface effectively in a short time by pivotally supporting a plurality of electrode plates along the outer circumference of the tip part of an electrode support shaft, radially opening said electrode plates up to an arbitrary angle to confront the inner face to be polished and forcing each electrode plate to make rotation and axial reciprocating slide in the electrolytic liquid. CONSTITUTION:A supportring 9 is slided axially via a link 11 by making, on an electrode support shaft 5, back and forth adjustment of an adjusting serew ring 10 coustituting an electrode opening mechanism 8, and each electrode plate L is actuated to open via each supporting rod 12. The angle of opening and holding at open position can be arbitrarily set and secured by meaus of the adjusting screw ring 10. Each electrode plate 1 is set at the optimum angle of opening to be inserted into a metal tank 17 in response to the shape and size of the inner surface 17a of the cylindrical metal tank 17 to be the target object of polishing, while the part of metal tank 17 on the positive electrode part 2 side is rendered a negative electrode and the metal tank 17 is filled with electrolytic liquid 18 including abrasive 19. Assigned voltage is applied to both electrodes and each electrode plate 1 is rotated and reciprocated in sliding in the axial direction so as to achieve effective mirror face finishing. |
