Cincinnati Milacron Inc.

Minnesota Mining and Manufacturing Company

Cimcool Industrial Products, Inc.

Soo C Yoon

Roger A Gary

William P Wood

Henry Turchin

Mark K Krueger

Ken G Forney

Cor A Smits

James H Giles, Jr

Impregnated grinding wheel

A method is provided that produces grinding wheels which exhibit improved burn reduction or prevention, lower power consumption and increased penetration of metalworking fluid into the grinding zone in high metal removal rate grinding operations such as for example creep feed grinding. The method comprises the steps of preparing a blend, cold pressing the blend in a mold to the desired shape, size and density to form a cold molded article, removing the cold molded article from the mold and firing the cold molded article to produce the vitreous bonded abrasive article wherein the blend comprises aluminum oxide abrasive grains, non-metallic, inorganic, thermally conductive, solid particles having higher thermal conductivity than the abrasive grains and a particle size at least twice that of the abrasive grains, a vitreous matrix precursor which forms a vitreous matrix having a bond with the thermally conductive, solid particles that is weaker than the bond with the abrasive grains and an organic, open cell producing, solid pore inducer that produces spring back of the cold molded article (i.e. green molding) that is at least equal to the smallest particle size of the article size range of the pore inducer.

Method for producing an improved vitreous bonded abrasive article and

A vitreous bonded abrasive article such as a grinding wheel is provided comprising high density sol-gel alumina-based abrasive grains comprised of alpha alumina and a vitreous bond which binds together the abrasive grains. The grinding wheel of the invention exhibits enhanced G-ratio grinding performance over comparable wheels containing sol-gel alumina-based abrasive grain having a density less than 3.85 grams per cubic centimeter.

High density sol-gel alumina-based abrasive vitreous bonded grinding

There has been discovered the increased E-Modulus and grinding performance of vitreous bonded sol-gel abrasive grit abrasive articles, particularly abrasive grinding wheels, by the incorporation therein of inorganic, non-metallic bubbles. In a practice of the invention the abrasive article comprises a) an abrasive phase having sintered sol-gel alumina abrasive grits and second abrasive grits that are not of the sintered sol-gel type, b) a vitreous bond and c) essentially hollow, essentially spherical alumina particles having a softening temperature at least 50.degree. F. greater than the firing temperature of the vitreous bond.

Vitreous bonded sol-gel abrasive grit article

A method for making vitreous bonded abrasive articles, particularly grinding wheels, is provided that includes the step of blending sugar/starch particles into the other ingredients for making the wheel. The sugar/starch particles are intimate combinations of sugar and starch. Wheels of improved performance are obtained compared to similar wheels made by a comparable method not including the step of blending sugar/starch particles into the abrasive grain, vitreous bond material and other components used for making the wheel.

Method of making vitreous bonded grinding wheels and grinding wheels

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Cincinnati, OH, United States of America

Soo C Yoon