High permeability grinding wheels
AssigneeNorton Company
InventorsMianxue Wu, Normand D. Corbin, Stephen E. Fox, Thomas Ellingson, Lee A. Carman
Life of this patent
Estimating the term…
Abstract
An abrasive article having certain minimum levels of permeability to fluids comprises about 40 to 80%, by volume interconnected porosity and effective amounts of abrasive grain and bond to carry out soft grinding and deep cut grinding operations. The high permeability to the passage of fluids and interconnected porosity provides an open structure of channels to permit the passage of fluid through the abrasive article and the removal of swarf from the workpiece during grinding operations.
Claims36
An abrasive article, comprising about 55% to about 80%, by volume, interconnected porosity defined by a matrix of fibrous particles, the fibrous particles having a length to diameter aspect ratio of at least 5:1, and abrasive grain and bond in amounts effective for grinding, and having an air permeability measured in cc air/second/inch of water of at least 0.44 times the cross-sectional width of the abrasive grain, wherein the interconnected porosity provides an open structure of channels permitting passage of fluid or debris through the abrasive article during grinding, and wherein the fibrous particles consist of materials selected from the group consisting of abrasive grain, filler, combinations thereof, and agglomerates thereof.
An abrasive article, having an air permeability measured in cc air/second/inch of water of at least 0.44 times the cross-sectional width of the abrasive grain, and comprising:
- (a) prior to curing the abrasive article, a matrix of fibrous particles, the fibrous particles having a length to diameter aspect ratio of at least 5:1;
- (b) after curing the abrasive article, about 55% to about 80%, by volume, interconnected porosity, the interconnected porosity being defined by the matrix of fibrous particles;
- and
- (c) abrasive grain and bond in amounts effective for grinding;
- wherein the interconnected porosity provides an open structure of channels permitting passage of fluid or debris through the abrasive article during grinding;
- and
- wherein the matrix of fibrous particles is at least one layer of structured filler selected from the group consisting of glass mat, organic mat, ceramic fiber mat, and combinations thereof.
An abrasive article, comprising about 40% to about 54%, by volume, interconnected porosity defined by a matrix of fibrous particles, the fibrous particles having a length to diameter aspect ratio of at least 5:1, and abrasive grain and bond in amounts effective for grinding, and having an air permeability measured in cc air/second/inch of water of at least 0.22 times the cross-sectional width of the abrasive grain, wherein the interconnected porosity provides an open structure of channels permitting passage of fluid or debris through the abrasive article during grinding, and wherein the fibrous particles consist of materials selected from the group consisting of abrasive grain, filler, combinations thereof, and agglomerates thereof.
An abrasive article, having an air permeability measured in cc air/second/inch of water of at least 0.44 times the cross-sectional width of the abrasive grain, and comprising:
- (a) prior to curing the abrasive article, a matrix of fibrous particles, the fibrous particles having a length to diameter aspect ratio of at least 5:1;
- (b) after curing the abrasive article, about 55% to about 80%, by volume, interconnected porosity, the interconnected porosity being defined by the matrix of fibrous particles;
- and
- (c) abrasive grain and bond in amounts effective for grinding;
- wherein the interconnected porosity provides an open structure of channels permitting passage of fluid or debris through the abrasive article during grinding;
- and
- wherein the matrix of fibrous particles is at least one layer of structured filler selected from the group consisting of glass mat, organic mat, ceramic fiber mat, and combinations thereof.
Dependencies are inferred from the claim text.