Toyoda Van Moppes Ltd.

Jtekt Corporation

Toyoda Koki Kabushiki Kaisha

Toyoda Van Moppes Kabushiki Kaisha

Yasuhisa Sekiya

Shinji Soma

Masato Kitajima

Tomohiro Inagaki

Tomoyasu Imai

Kunihiko Unno

Akimitsu Kamiya

Takayuki Moroto

Hiroshi Takehara

Noboru Hiraiwa

Toshiaki Sakurai

Akira Suzuki

Kunio Takahashi

In a grinding wheel in which abrasive tips for rough grinding and abrasive tips for finish grinding are alternately bonded to a periphery of a disk type base rotating about a rotation axis, each abrasive tip includes the abrasive layer formed by bonding abrasive grains and a lower layer overlaid and integrally for led with the abrasive layer. The abrasive tip is attached to the periphery of the base at the lower layer. A Young's modulus of the lower layer of the abrasive tip for finish grinding relative to a load acting on the grinding surface of the abrasive tip in an inward direction of the grinding wheel is less than that of the abrasive tip for rough grinding. Thereby, the surface of a workpiece can be both rough-ground and finish-ground with superhigh-precision surface roughness with using one grinding wheel.

Grinding wheel

A CBN grinding wheel having a circular core and an abrasive layer formed on the peripheral surface of the core. The abrasive layer comprises high toughness CBN grains and medium toughness CBN grains, wherein the high toughness CBN grains are incorporated into the abrasive layer in a ratio of 10-80% by weight with respect to the total amount of the CBN grains.

CBN grinding wheel

A grinding tool has diamond superabrasive grains as the abrasive and a bond to retain the abrasive grains. The bond is made of organic polymer or metal and contains as a filler both a solid film-forming lubricant and finely divided diamond superabrasive grains having a grain size smaller than one-third that of the diamond superabrasive grains as the abrasive. The grinding tool of this invention is suitable for grinding a hard cutting material such as cutting tools made of titanium nitride cermet and exhibits outstanding cutting performance and durability.

Grinding tool

Growing community of inventors

Okazaki, Japan

Yasuhisa Sekiya