Osaka Diamond Industrial Co.

Kosuke Mitsui

Yukio Shimizu

Nobuo Urakawa

Yukio Okanishi

Akihiro Koike

Akio Hara

Masaaki Yamanaka

Kazunori Kadomura

Tsutomu Takubo

Yoshio Kouta

Toshio Fukunishi

A superabrasive tool such as a superabrasive grindstone (,), a superabrasive dresser (,) or a superabrasive lap surface plate (,) includes a base (,) of steel and a superabrasive layer (,) formed on the base (,). The superabrasive layer (,) includes superabrasive grains (,) consisting of diamond grains, cubic boron nitride grains or the like and a holding layer consisting of a nickel plating layer (,) and a bond layer (,), or a brazing filler metal layer (,), holding the superabrasive grains (,) and fixing the same onto the base (,). Grooves (,) or holes (,) are formed on flat surfaces (,) of the superabrasive grains (,) exposed from the holding layer (,). The holding layer (,) holding and fixing the superabrasive grains (,) so that the surfaces of the grains are partially exposed is formed on the base (,). The grooves (,) or the holes (,) are formed by irradiating the surfaces of the superabrasive grains (,) exposed from the holding layer (,) with a laser beam (,). Working of high accuracy can be performed by forming the grooves (,) or the holes (,) on the surfaces of the superabrasive grains (,).

Superabrasive tool and method of manufacturing the same

A blade comprises a disc-shaped substrate having a major surface and an outer peripheral edge portion encircling the major surface, and an abrasive grain layer mounted on the outer peripheral edge portion of the substrate. The substrate includes a first disc having a major surface, and a second disc having a major surface which is superposed on that of the first disc. The major surface of the second disc is separated from that of the first disc, thereby defining a clearance between the major surfaces of the first and second discs and correspondingly forming a convex surface region on the outside surface of the substrate. The peripheral portion of the convex surface region is provided with a contact portion where the major surfaces of the first and second discs are slidably in contact with each other. An adhesion inhibitor is applied to the major surfaces of the first and second discs before superposing these major surfaces with each other, and the outer peripheral edge portions of the superposed first and second discs are covered with a mixed powder of abrasive grains and metal powder. The mixed powder is then sintered, thereby forming the abrasive grain layer which is fixed to the outer peripheral edge portions. The first and second discs are then spot-welded together at a plurality of locations between the major surfaces of the first and second discs.

Abrasive blade with reduced cutting noise

Growing community of inventors

Sakai, Japan

Kosuke Mitsui