Vitrified abrasive solid mass having pores filled with resin, and solid lubricant agent

• US 6,428,587 B1
• Filed: 08/03/2001
• Issued: 08/06/2002
• Est. Priority Date: 08/03/2001
• Status: Active Grant

• Current Assignee: Noritake Company Limited (Noritake)
• Original Assignee: Noritake Company Limited (Noritake)
• Inventors: Ito, Kenji
• Primary Examiner(s): MARCHESCHI, MICHAEL A
• Application Number:
  US09/920,742
• Time in Patent Office: 368 Days
• Field of Search: 512/96, 512/98, 513/07, 513/09, 512/95
• US Class Current: 51/298
• CPC Class Codes: B24D 18/00 Manufacture of grinding tools or other grinding devices, e.g. wheels, not otherwise provided for
• CPC Class Codes: B24D 3/18 for porous or cellular structure
• CPC Class Codes: B24D 3/342 incorporated in the bonding agent

Abstract

An abrasive vitreous bonded solid mass having a vitrified abrasive structure comprising abrasive grains which are held together by an inorganic bonding agent, the abrasive structure is impregnated with a composition which comprises a resin and a solid lubricant agent. The abrasive solid mass is manufactured by preparing the composition comprising the resin and the solid lubricant agent, impregnating the vitrified abrasive structure with the composition, and curing the composition.

Claims

1. An abrasive vitreous bonded solid mass having a vitrified abrasive structure which has pores and which includes abrasive grains and an inorganic bonding agent that holds said abrasive grains together, wherein said pores are partially filled with a cured composition comprising a resin and a solid lubricant agent.

2. An abrasive vitreous bonded solid mass according to claim 1, wherein said vitrified abrasive structure further includes aggregates that are held together with said abrasive grains by inorganic bonding agent.

3. An abrasive vitreous bonded solid mass according to claim 1, wherein the resin in said composition consists of at least one synthetic resin which is selected from a phenol resin or an epoxy resin.

4. An abrasive vitreous bonded solid mass according to claim 1, wherein said abrasive grains consist of diamond abrasive grains.

5. An abrasive vitreous bonded solid mass according to claim 1, wherein said abrasive grains consist of CBN abrasive grains.

6. An abrasive vitreous bonded solid mass according to claim 1, wherein the abrasive grains consist of mixture of diamond abrasive grains and CBN abrasive grains.

7. An abrasive vitreous bonded solid mass according to claim 1, wherein said solid lubricant agent comprised in said composition is a hexagonal crystal boron nitride.

8. An abrasive vitreous bonded solid mass according to claim 1, wherein the solid lubricant agent in said composition is 1-80% by weight based on the weight of the resin.

9. An abrasive vitreous bonded solid mass according to claim 1, wherein the abrasive grains consist of super abrasive grains, which have an average particle diameter size of 20-220 mm.

10. An abrasive vitreous bonded solid mass according to claim 1, wherein the vitrified abrasive structure has a concentration of said abrasive grains ranging from 10 to 230 parts by volume.

11. An abrasive vitreous bonded solid mass according to claim 1, wherein the vitrified abrasive structure has a porosity ranging from 20-75% by volume, before the vitrified structure is impregnated with the composition comprising the resin and the solid lubricant agent.