1993 年 59 巻 1 号 p. 161-166
A new unit type magnetic finishing apparatus composed of ferrite permanent magnets is developed to finish precisely the internal surface of a non-ferromagnetic tubing, as a substitute for the previous finishing apparatus with large and heavy electromagnetic coils. This new finishing unit is installed easily on the carriage of a conventional lathe. The finishing jig composed of rare earth permanent magnets is also developed by which the powerful finishing pressure is generated by a magnetic force. This paper described the new unit type finishing apparatus, the finishing jig and their internal finishing performances for cleaning stainless steel tubings.