Bonded abrasive article and method of grinding

Patent metadata

Field	Value
Publication number	US-9833877-B2
Application number	US-201414231066-A
Country	US
Kind code	B2
Filing date	Mar 31, 2014
Priority date	Mar 31, 2013
Publication date	Dec 5, 2017
Grant date	Dec 5, 2017

Abstract

An abrasive article configured to grind a workpiece having a fracture toughness of at least about 5.5 MPa·m 0.5 may include a body comprising abrasive particles contained within a bond material comprising a metal, wherein the body comprises a ratio of V AG /V BM of at least about 1.3, wherein V AG is a volume percent of abrasive particles within a total volume of the body and V BM is a volume percent of bond material within the total volume of the body, and wherein the abrasive particles have an average particle size of at least about 1 micron and not greater than about 20 microns.

First claim

What is claimed is:

1. An abrasive wheel configured to grind a workpiece having a fracture toughness of at least about 5.5 MPa·m 0.5 comprising:
a body comprising abrasive particles contained within a bond material comprising a metal and at least about 1 vol. % of an active bond composition for a total volume of the bond material,
wherein the body comprises a ratio of V AG /V BM of at least 1.7 and not greater than 9.0, wherein V AG is a volume percent of abrasive particles within a total volume of the body and V BM is a volume percent of bond material within the total volume of the body,
wherein the abrasive particles have an average particle size of at least about 1 micron and not greater than about 20 microns,
wherein the body comprises at least about 30 vol. % porosity, and
wherein the abrasive wheel comprises a tip radius of not greater than 0.002 inches.

2. The abrasive wheel of claim 1 , wherein the abrasive particles comprise diamonds, wherein the diamonds are synthetic and wherein the diamonds are single crystal.

3. The abrasive wheel of claim 1 , wherein the active bond composition is chemically bonded to at least a portion of a surface of at least a portion of the abrasive particles.

4. The abrasive wheel of claim 1 , wherein the bond material comprises at least about 1 vol. % and not greater than about 40 vol % for a total volume of the bond material.

5. The abrasive wheel of claim 1 , wherein the ratio of V P /V BM is within a range between about 1.5 and about 9.0, wherein V P is a volume percent of particulate material including abrasive grains and fillers within a total volume of the body and V BM is a volume percent of bond material within the total volume of the body.

6. An abrasive wheel configured to grind threads on a workpiece comprising a carbide, the abrasive wheel comprising:
a body comprising abrasive particles contained within a bond material comprising a metal and at least about 1 vol. % of an active bond composition for a total volume of the bond material,
wherein the body comprises a ratio of V AG /V BM of at least 1.7 and not greater than 9.0, wherein V AG is a volume percent of abrasive particles within a total volume of the body and V BM is a volume percent of bond material within the total volume of the body,
wherein the abrasive wheel comprises a tip radius of not greater than about 0.002 inches, and
wherein the body comprises at least about 30 vol. % porosity.

7. The abrasive wheel of claim 6 , wherein the abrasive particles comprise diamonds, wherein the diamonds are synthetic and wherein the diamonds are single crystal.

8. The abrasive wheel of claim 6 , wherein the abrasive particles have an average particle size of at least about 1 micron and not greater than about 20 microns.

9. The abrasive wheel of claim 6 , wherein the abrasive wheel is configured to grind a workpiece having a fracture toughness of at least about 5.5 MPa·m 0.5 .

10. The abrasive wheel of claim 6 , wherein the ratio of V P /V BM is within a range between about 1.5 and about 9.0, wherein V P is a volume percent of particulate material including abrasive grains and fillers within a total volume of the body and V BM is a volume percent of bond material within the total volume of the body.

11. A method of forming an abrasive wheel configured to grind threads on a workpiece comprising a carbide, the method comprising:
providing a mixture including abrasive particles and bond material, wherein the bond material comprises a metal and at least about 1 vol. % of an active bond composition for a total volume of the bond material; and
forming an abrasive body including the abrasive particles contained within the bond material,
wherein the body comprises a ratio of V AG /V BM of at least 1.7 and not greater than 9.0, wherein V AG is a volume percent of abrasive particles within a total volume of the body and V BM is a volume percent of bond material within the total volume of the body;
wherein the body comprises a ratio of V P :V BM of at least about 3:2, wherein V P is a volume percent of particulate material including abrasive particles and fillers within a total volume of the body and V BM is a volume percent of bond material within the total volume of the body,
wherein the abrasive wheel comprises a tip radius of not greater than about 0.002 inches, and
wherein the body comprises at least about 30 vol. % porosity.

12. The abrasive wheel of claim 11 , wherein the abrasive particles comprise diamonds, wherein the diamonds are synthetic and wherein the diamonds are single crystal.

13. The abrasive wheel of claim 11 , wherein the abrasive particles have an average particle size of at least about 1 micron and not greater than about 20 microns.

14. The method of claim 11 , wherein the abrasive wheel is configured to grind a workpiece having a fracture toughness of at least about 5.5 MPa·m 0.5 .

Assignees

• Saint Gobain Abrasives Inc
• Saint Gobain Abrasifs Sa

Inventors

• Ramanath Srinivasan
• Lane William H
• Upadhyay Rachana
• Hitchiner Michael P

Classifications

• B24D3/10 Primary

  for porous or cellular structure, e.g. for use with diamonds as abrasives · CPC title