Cup wheel for hard brittle substance

Abstract

Abstract PURPOSE:To prevent a hard brittle substance from being heated and damaged, by prescribing the shape of the front end of the grindstone holder of a cup wheel least the side surface of the holder should come into contact with the hard brittle substance in grinding. CONSTITUTION:The surface of the electroformed grindstone making end part 14a of a metal-made holder 14 for an electroformed grindstone is convexly curved. Abrasive grains are educed as eutectoid in a bonding material on a region 15 which extends in the center of the convexly curved surface and has a central angle theta of about 120 deg. or less. However, since abrasive grains are not sufficiently educed as eutectoid on an outer region 16 and an inner region 17, these regions 16, 17 are cut, as shown by a dotted line, so that the electroformed grindstone 18 is manufactured on only the region 15. When a cup wheel thus manufactured is used to grind a hard brittle substance such as glass, the side surfaces 16, 17 of the grindstone making part 14a do not come into contact with the hard brittle substance and do not damage it in the grinding because the side surface are cut.

Inventors

• 👤 Yasukazu Seki
• 👤 Kazuyuki Haneda

Bibliographic Details