Reinforced bonded abrasive tools
First Claim
Patent Images
1. A bonded abrasive wheel comprising:
- a disc shaped body, the disc shaped body comprising;
a neutral axis lying along a central plane of the disc shaped body;
an arbor hole extending through the body;
a generally flat first face extending from the arbor hole to a wheel outer diameter;
a generally flat second face extending from the arbor hole to the wheel outer diameter opposite the first face;
a non-grinding zone adjacent to the arbor hole between the first face and the second face;
a grinding zone extending from the non-grinding zone to a wheel outer diameter along the first face and the second face;
a first reinforcement layer between the neutral axis and the first face;
a second reinforcement layer between the neutral axis and the second face opposite the first reinforcement layer, wherein one or more of said reinforcements are fiberglass webs, andwherein the fiberglass web is coated with a sizing system and a second coating that excludes wax.
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Accused Products
Abstract
Bonded abrasive tools, e.g., grinding wheels, can be reinforced using, for instance, one or more fiberglass web(s) having a surface of glass per unit of at least 0.2. Alternatively or in addition, the fiberglass web has a thickness of 2 mm or less. The web can be designed to provide improved adhesion between the fiberglass reinforcement and the mixture employed to form the bonded abrasive tool. In some examples, the middle reinforcement at the neutral zone of the wheel can be eliminated or minimized.
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Citations
31 Claims
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1. A bonded abrasive wheel comprising:
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a disc shaped body, the disc shaped body comprising; a neutral axis lying along a central plane of the disc shaped body; an arbor hole extending through the body; a generally flat first face extending from the arbor hole to a wheel outer diameter; a generally flat second face extending from the arbor hole to the wheel outer diameter opposite the first face; a non-grinding zone adjacent to the arbor hole between the first face and the second face; a grinding zone extending from the non-grinding zone to a wheel outer diameter along the first face and the second face; a first reinforcement layer between the neutral axis and the first face; a second reinforcement layer between the neutral axis and the second face opposite the first reinforcement layer, wherein one or more of said reinforcements are fiberglass webs, and wherein the fiberglass web is coated with a sizing system and a second coating that excludes wax. - View Dependent Claims (8, 9, 10, 11, 12, 13, 14, 15)
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2. A bonded abrasive wheel comprising:
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a disc shaped body, the disc shaped body comprising; a neutral axis lying along a central plane of the disc shaped body; an arbor hole extending through the body; a generally flat first face extending from the arbor hole to a wheel outer diameter; a generally flat second face extending from the arbor hole to the wheel outer diameter opposite the first face; a non-grinding zone adjacent to the arbor hole between the first face and the second face; a grinding zone extending from the non-grinding zone to a wheel outer diameter along the first face and the second face; a first reinforcement layer between the neutral axis and the first face; a second reinforcement layer between the neutral axis and the second face opposite the first reinforcement layer, wherein one or more of said reinforcements are fiberglass webs, and wherein the fiberglass web is produced by partially curing a second coating applied to the fiberglass web. - View Dependent Claims (16, 17, 18, 19, 20, 21, 22, 23)
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3. A bonded abrasive wheel comprising:
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a disc shaped body, the disc shaped body comprising; a neutral axis lying along a central plane of the disc shaped body; an arbor hole extending through the body; a generally flat first face extending from the arbor hole to a wheel outer diameter; a generally flat second face extending from the arbor hole to the wheel outer diameter opposite the first face; a non-grinding zone adjacent to the arbor hole between the first face and the second face; a grinding zone extending from the non-grinding zone to a wheel outer diameter along the first face and the second face; a first reinforcement layer between the neutral axis and the first face; a second reinforcement layer between the neutral axis and the second face opposite the first reinforcement layer, wherein one or more of said reinforcements are fiberglass webs, and wherein at least 99% of the fiber interface surfaces are coated with the second coating. - View Dependent Claims (24, 25, 26, 27, 28, 29, 30, 31)
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- 4. A bonded abrasive tool comprising one or more fiberglass webs, wherein at least one fiberglass web has a fiberglass surface per unit area that is no greater than about 0.95, and wherein the at least one fiberglass web has a second coating that excludes wax or a second coating produced by a process in which polymeric materials present in the second coating are partially crosslinked.
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6. A method for producing a bonded abrasive article, the method comprising:
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a. combining abrasive grains and a bonding material to prepare a mixture; b. molding the mixture into a green body that includes at least one fiberglass reinforcement; and c. curing the bonding material to produce the bonded abrasive article, wherein (i) the fiberglass reinforcement is coated with a second coating that does not include wax, is partially cross-linked or both;
or (ii) the fiberglass reinforcement has a fiberglass surface density that is no greater than 0.95, wherein at least 99 percent of fiberglass interface surfaces are coated with the second coating. - View Dependent Claims (7)
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Specification