Porous grinding stone and method of production thereof
AssigneesKozo Ishizaki, Atsushi Takata
InventorsKozo Ishizaki, Atsushi Takata, Kazuyuki Kumeta
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Abstract
An abrasive-particle grinder and a method of manufacturing the grinder, in which the bonding force between super-abrasive particles and a binder is enhanced, attrition of the binder during a grinding process is increased, and physical properties of the grinder are improved. The grinder comprises super-abrasive particles as grinding particles and metal powder as a binder. The binder is formed into a porous body and then at least the surface thereof is denatured to ceramic. Protrusion of the abrasive particles is first controlled and then grip of the abrasive particles is controlled.
Claims20
A porous abrasive-particle grinder comprising:
- super-abrasive particles as grinding particles and
- metal powder as a binder, wherein said binder is formed into a porous body holding said super-abrasive particles with chemical and physical bonding, and at least the surface of said binder is converted to ceramic compound.
A method of manufacturing a porous abrasive-particle grinder by using super-abrasive particles as grinding particles and metal powder as a binder, comprising the step of:
- controlling bonding strength of super-abrasive particles by converting the surface of said binder to ceramic compound separately from a step of forming said binder into a porous body.
A method of manufacturing a porous abrasive-particle grinder, said method comprising the steps of:
- mixing super-abrasive particles as grinding particles and metal powder as a binder together to form a mixture;
- molding the mixture into a shape of the grinder;
- sintering the molded mixture under temperature and pressure adjusted such that atoms are diffused at the interface between said super-abrasive particles and binder particles in said molding and said binder particles are sintered together into a sintered porous body;
- and
- heating the sintered porous body in an atmosphere comprising one or more selected from a group consisting of nitrogen, carbon and hydrogen so that at least the surface of said binder is converted to ceramic compound.
Dependencies are inferred from the claim text.