Abrasive tools having a permeable structure
First Claim
1. A bonded abrasive tool comprising:
- a) a blend of abrasive grains including;
i) a filamentary sol-gel alumina abrasive grain having a length-to-cross-sectional-width aspect ratio of greater than about 1.0, or an agglomerate thereof; and
ii) agglomerated abrasive grain granules including a plurality of abrasive grains held in a three-dimensional shape by a binding material;
b) a bond; and
c) at least about 35 volume percent porosity.
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Accused Products
Abstract
A bonded abrasive tool comprises a blend of abrasive grains and a bond component. The blend of abrasive grains comprises a filamentary sol-gel alumina abrasive grain and agglomerated abrasive grain granules. A bonded abrasive tool comprising an agglomerate of filamentary sol-gel alumina abrasive and non-filamentary abrasive grains, and a bond component is also disclosed. The filamentary sol-gel alumina abrasive grain has a length-to-cross-sectional-width aspect ratio of greater than 1.0. The agglomerated abrasive grain granules comprise a plurality of abrasive grains held in a three-dimensional shape by a binding material. A method of making such a bonded abrasive tool as described above is also disclosed.
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Citations
29 Claims
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1. A bonded abrasive tool comprising:
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a) a blend of abrasive grains including;
i) a filamentary sol-gel alumina abrasive grain having a length-to-cross-sectional-width aspect ratio of greater than about 1.0, or an agglomerate thereof; and
ii) agglomerated abrasive grain granules including a plurality of abrasive grains held in a three-dimensional shape by a binding material;
b) a bond; and
c) at least about 35 volume percent porosity. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. A bonded abrasive tool comprising:
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a) an agglomerate comprising;
i) a filamentary sol-gel alumina abrasive grain having a length-to-cross-sectional-width aspect ratio of greater than about 1.0;
ii) a non-filamentary abrasive grain; and
iii) a binding material, wherein the non-filamentary abrasive grain and filamentary sol-gel alumina abrasive grain are held in a three-dimensional shape by the binding material;
b) a bond; and
c) at least about 35 volume percent porosity. - View Dependent Claims (18, 19, 20, 21, 22)
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23. A method of making a bonded abrasive tool, comprising:
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a) forming a blend of abrasives, the blend comprising;
i) a filamentary sol-gel alumina abrasive grain having a length-to-cross-sectional-width aspect ratio of greater than about 1.0 or an agglomerate thereof; and
ii) agglomerated abrasive grain granules comprising a plurality of abrasive grains held in a three-dimensional shape by a binding material;
b) combining the blend of abrasives and a bond component;
c) molding the combined blend of abrasives and bond component into a shaped composite comprising at least about 35 volume percent porosity; and
d) heating the shaped composite to form the bonded abrasive tool. - View Dependent Claims (24, 25, 26, 27, 28, 29)
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Specification