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US 8,808,413 B2Granted
Abrasive tool having controlled porosity distribution
AssigneesSaint-Gobain Abrasives, Inc., Saint-Gobain Abrasifs
InventorsEmmanuel C. Francois, Konstantin S. Zuyev, Muthu Jeevanantham, Anne M. Bonner, Michael W. Klett, Dean S. Matsumoto
Life of this patent
Estimating the term…
Abstract
An abrasive tool having a body including an abrasive portion having abrasive grains contained within a matrix material and porosity characterized by a bimodal distribution of pores including large pores having an average large pore size (Pl) and small pores having an average small pore size (Ps), wherein Pl>Ps. The body of the abrasive tool further includes a first reinforcing member contained within the abrasive portion, and a percent thermal expansion over a temperature range for 25° C. to 450° C. of not greater than about 0.7%.
Claims20
A large diameter abrasive wheel comprising:
- a body having an aspect ratio defined as a ratio between diameter to thickness of at least about 10:1, wherein the body includes:
- an abrasive portion in the form of a layer and having abrasive grains contained within a matrix material and porosity characterized by a bimodal distribution of pores including large pores having an average large pore size (Pl), small pores having an average small pore size (Ps), and a percent difference between the average large pore size (Pl) and average small pore size (Ps) of at least 25% based on the equation ((Pl−Ps)/Pl)×100), wherein Pl>Ps, wherein the abrasive portion comprises between at least about 40 vol % and about 60 vol % of abrasive grains and between at least about 30 vol % and about 56 vol % of matrix material, and wherein the matrix material comprises between at least about 60 vol % and about 85 vol % of an organic material;
- a first glass-fiber reinforcing member in the form of a layer distinct from the abrasive portion and contained within the body, wherein the first reinforcing member and the abrasive portion are in direct contact with each other at an interface extending through a diameter of the body;
- a percent thermal expansion over a temperature range of 25° C. to 450° C. of not greater than about 0.7%.
1 more element
A large diameter abrasive wheel comprising:
- a body having an aspect ratio defined as a ratio between diameter to thickness of at least about 10:1, wherein the body includes:
- an abrasive portion in the form of a layer and having abrasive grains contained within a matrix material and porosity characterized by a bimodal distribution of pores including large pores having an average large pore size (Pl) and small pores having an average small pore size (Ps), wherein the small pores have an average small pore size (Ps) of not greater than about 0.70 mm, wherein Pl>Ps, wherein the abrasive portion comprises between at least about 40 vol % and about 60 vol % of abrasive grains and between at least about 30 vol % and about 56 vol % of matrix material, and wherein the matrix material comprises between at least about 60 vol % and about 85 vol % of an organic material;
- a first glass-fiber reinforcing member in the form of a layer distinct from the abrasive portion and contained within the body, wherein the first reinforcing member and the abrasive portion are in direct contact with each other at an interface extending through a diameter of the body;
- a percent thermal expansion over a temperature range of 25° C. to 450° C. of not greater than about 0.7%.
1 more element
A large diameter abrasive wheel comprising:
- a body having an aspect ratio defined as a ratio between diameter to thickness of at least about 10:1, wherein the body includes:
- an abrasive portion in the form of a layer and having abrasive grains contained within a matrix material and porosity characterized by a bimodal distribution of pores including large pores having an average large pore size (Pl) and small pores having an average small pore size (Ps), wherein the large pores have an average large pore size (Pl) of at least about 0.75 mm, wherein Pl>Ps, wherein the abrasive portion comprises between at least about 40 vol % and about 60 vol % of abrasive grains and between at least about 30 vol % and about 56 vol % of matrix material, and wherein the matrix material comprises between at least about 60 vol % and about 85 vol % of an organic material;
- a first glass-fiber reinforcing member in the form of a layer distinct from the abrasive portion and contained within the body, wherein the first reinforcing member and the abrasive portion are in direct contact with each other at an interface extending through a diameter of the body;
- a percent thermal expansion over a temperature range of 25° C. to 450° C. of not greater than about 0.7%.
1 more element
Dependencies are inferred from the claim text.