Nissin Unyu Kogyo Co., Ltd.

Youji Azuma

Kazuo Akagi

Akira Hashimoto

Masafumi Tomita

To provide an electrolytic integrated polishing method for the external surface of metallic tubes, wherein both dimensional precision such as roundness or the like and product yield can be improved, and aluminum alloy photosensitive drum substrates prepared thereby. A metallic tube, both ends of which are supported, is positively charged and rapidly rotated about the axis thereof. More than one grindstone are pressed with a constant pressure against the external surface of the metallic tube from opposite directions or radial directions having the rotation axis as the center of rotation. Negative pole electrodes are disposed so as to sandwich the grindstones along a circular direction to perform electrolytic integrated polishing by supplying electrolyte to the external surface of the metallic tube. High-precision mirror processing of the external surface of the metallic tube can be performed by an integrating abrasion effect for eliminating a passivation coating formed on the external surface of the metallic tube by the grindstones and intensive electrolytic elution by the electrolyte.

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Shimonoseki, Japan

Youji Azuma