The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 04, 1982
Filed:
Oct. 27, 1980
Yasuo Kimoto, Fujiidori, JP;
Katsunori Tamiya, Kobe, JP;
Shoichi Honda, Osaka, JP;
Hidehiko Maehata, Toyonaka, JP;
Hiroshi Kamada, Takatsuki, JP;
Hitachi Shipbuilding and Engineering Co., Ltd., Osaka, JP;
Abstract
In a method of mirror-finishing a cylindrical workpiece, according to which, with an abrasive matter and an electrolyte disposed at and supplied to each of the gaps between a cylindrical workpiece connected to the anode of a power supply and working electrodes connected to the cathode of the power supply and disposed oppositely to the outer surface or the inner surface of said cylindrical workpiece, an anodic liquation operation by electrolysis performed onto metal in the surface to be treated of the cylindrical workpiece is assisted with an abrasive operation by which anodic passive films generated on the surface to be treated are mechanically abrased by the abrasive matters, whereby the projected portions of the surface to be treated are electrolytically liquated and abrased preferentially, said method is characterized in that an electrolyte in a passive state is used, an electrolytic voltage to be used is in the range from a few V to about 15 V, the density of an electrolytic current to be used is about 10A/cm.sup.2 or less, the abrasive matter has a water-permeable property, the pressing force of the abrasive matters to the surface to be treated is 0.5 kgf/cm.sup.2 or more, the abrasive speed of the abrasive matters is 2 m/s or more, and the cycle which a portion of the surface to be treated is faced to the working electrodes is in the range from 20 to 200 ms.