Other

Junichi Uchino

Manabu Yamada

Hitoshi Ohmori

Susumu Shimizu

Nobuhide Itoh

Shinji Ishii

A metal bond grinding wheel,having a horizontal working surface,a holding and rotating means,for a workpiece having a horizontal supporting surface,opposite to said working surface,a voltage applying means,having the metal bond grinding wheels and an electrode,installed oppositely to the working surfaces in an uncontacted state and applying a pulsed voltage between them, a grinding fluid feeding means,for feeding an electroconductive grinding fluid to the working surfaces are installed. The holding and rotating means,holds and rotate a disk-like magnetic disc substrate,or a truing grinding wheel,to closely contact to its supporting surface, has constitution capable of moving horizontally and vertically, wherein a surface for working,is processed to yield a flat surface on the machine, subsequently, alternative operations on the machine are carried out for grinding of the supporting surface,of the holding and rotating means of the workpiece simultaneously with electrolytic dressing of the metal bond grinding wheel and grinding of the magnetic disc substrate,attached to the holding and rotating means of the workpiece.

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Tokyo, Japan

Junichi Uchino