Abrasive grain and method for producing it, polishing tool and method for producing it, grinding wheel and method for producing it, and polishing apparatus
AssigneeRicoh Company, Ltd.
InventorsHiroyuki Endoh, Jun Zhang, Toshiyuki Enomoto
Life of this patent
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Abstract
An abrasive grain including a porous particle material in which a large number of secondary particles contain gaps between primary particles bonded to each other. The secondary particles are produced by growing primary particles into secondary particles, which are formed by cohesion of a large number of primary particles, via a heat treatment at a temperature sufficient to form necks at bonding points between the primary particles.
Claims5
An abrasive grain, wherein the abrasive grain is obtained by forming a secondary particle by agglomerating a plurality of primary particles to form grinding surfaces, and
- heating the secondary particle to form neck portions by bonding the primary particles together,
- wherein in the secondary particle, the neck portions include a portion thinner than the primary particles, such that the primary particles break away from each other at the neck portion and
- the neck portions bonding the primary particles together have a shape of a hyperboloid of one sheet.
Dependencies are inferred from the claim text.