ELECTROLYTIC COMPOSITE POLISHING METHOD AND DEVICE FOR LONG METAL TUBE INNER FACE

摘要

PROBLEM TO BE SOLVED: To apply high-accuracy mirror-machining while pressing grinding tools to the inner face of a metal tube at a constant pressure by providing a silicone tube in a tool electrode, and introducing a fluid into the silicone tube. ;SOLUTION: Dry compressed air is fed into a through hole 13a from the rear end section of a rotary shaft 13 at the time of polishing with elastic grinding tools 20, and the air flows into a silicone tube 18 through the shaft hole 17a of a plug 17 to apply pressure to the silicone tube 18. The elastic grinding tools 20 are extruded in the radial direction by this pressure into contact with the inner face of a metal tube 6 at a constant pressure, and extremely high- accuracy polishing is obtained. The pressing force of the elastic grinding tools 20 can be optionally adjusted by the adjustment of the air pressure. Even when abrasion dispersion occurs on multiple elastic grinding tools 20, the dispersion can be absorbed by the elastic action of the silicone tube 18.;COPYRIGHT: (C)1998,JPO