Electrochemical grinding tool and method
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United States of America Patent
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Dec 9, 2014
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app pub date -
Aug 6, 2012
filing date -
Aug 6, 2012
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Abstract
An electrochemical grinding tool and method capable of rounding sharp edges that may be prone to cracking, for example, edge regions of cooling slots within dovetail slots of turbine wheels. The electrochemical grinding tool includes a drilling assembly, a conductive bit, and a motor for rotating the conductive bit about an axis thereof. The conductive bit of the electrochemical grinding tool is inserted into a first slot, an electrolyte solution is applied between the conductive bit of the electrochemical grinding tool and a second slot that intersects the first slot, an electrical potential is applied to the conductive bit and the turbine wheel to create a potential gradient between the conductive bit and the edge of the second slot, and material is removed from the edge of the second slot by displacing the conductive bit about and along the edge.
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