Abrasive Tools Having a Permeable Structure
First Claim
1. A method of making a bonded abrasive tool, comprising:
- a) forming a blend of abrasives, the blend comprising;
i) agglomerates including filamentary sol-gel alumina abrasive grain having a length-to-cross-sectional-width aspect ratio of at least about 2;
1 and non-filamentary abrasive grains; and
ii) agglomerated abrasive grain granules including a plurality of abrasive grains held in a three-dimensional shape by a binding material, the abrasive grains having a length-to-cross-sectional-width aspect ratio of about 1.0, wherein a total amount of non-filamentary abrasive grains present in the blend is less than or equal to 50% of the weight of the blend;
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 to 80 volume percent porosity; and
d) heating the shaped composite to form the bonded abrasive tool.
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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
11 Claims
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1. A method of making a bonded abrasive tool, comprising:
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a) forming a blend of abrasives, the blend comprising; i) agglomerates including filamentary sol-gel alumina abrasive grain having a length-to-cross-sectional-width aspect ratio of at least about 2;
1 and non-filamentary abrasive grains; andii) agglomerated abrasive grain granules including a plurality of abrasive grains held in a three-dimensional shape by a binding material, the abrasive grains having a length-to-cross-sectional-width aspect ratio of about 1.0, wherein a total amount of non-filamentary abrasive grains present in the blend is less than or equal to 50% of the weight of the blend; 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 to 80 volume percent porosity; and d) heating the shaped composite to form the bonded abrasive tool. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A bonded abrasive tool comprising:
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a) a blend of abrasive grains including; i) agglomerates of filamentary sol-gel alumina abrasive grain having a length-to-cross-sectional-width aspect ratio of at least about 2;
1 held by a binding material; andii) agglomerated abrasive grain granules including a plurality of abrasive grains held in a three-dimensional shape by the binding material, the abrasive grains having a length-to-cross-sectional-width aspect ratio of about 1.0; b) a bond; and c) about 50 volume percent to 75 volume percent porosity. - View Dependent Claims (9, 10, 11)
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Specification