Tokyo Diamond Tools Mfg. Co., Ltd.

Kai Kyoshima

Takeshi Yagi

A synthetic grindstone for performing a surface processing includes abrasive grains with an abrasive grain proportion (Vg) higher than 0 vol. % and equal to or lower than 40 vol. %, includes a nonwoven-fabric binder with a binder proportion (Vb) equal to or higher than 35 vol. % and lower than 90 vol. %. The synthetic grindstone has a porosity (Vp) higher than 10 vol. % and equal to or lower than 55 vol. %.

Synthetic grindstone, synthetic grindstone assembly, and method of manufacturing synthetic grindstone

A synthetic grindstone for performing surface processing includes: abrasive grains; a vitrified-material binder configured to retain the abrasive grains in a dispersed state; and a filler arranged in the binder in a dispersed state. The filler includes at least one of a first filler having an average grain size larger than an abrasive grain size of the abrasive grains, a second filler having an electrical conductivity, or a third filler having a hardness higher than a hardness of an object to be ground.

A synthetic grindstone for performing surface processing, includes: abrasive grains; binder made of a thermosetting resin material and holding the abrasive grains in a dispersed state; and filler including at least one of first filler, second filler, and third filler. The first filler has a larger average particle diameter than the abrasive grains. The second filler has electrical conductivity. The third filler is harder than a workpiece. The filler is disposed in a state of being dispersed in the binder.

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Tokyo, Japan

Kai Kyoshima