ENGINE BORE MILLING PROCESS
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United States of America Patent
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May 4, 2017
app pub date -
Oct 30, 2015
filing date -
Oct 30, 2015
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Abstract
A method of milling an engine bore is disclosed. The method may include inserting a milling tool having a plurality of cutting edges along a longitudinal axis into an engine bore, rotating the milling tool about the longitudinal axis and moving the milling tool around a perimeter of the engine bore to remove material from the engine bore, and rough honing the bore. The milling may generate a tapered bore (e.g., frustoconical). The rough honing process may increase a minimum diameter of the tapered bore by at least 60 μm. A total time of the milling and honing process may be less than 60 seconds. In one embodiment, the honing step may include using a grit size of at least 200 μm and/or using a honing force of at least 200 kgf. The method may reduce the cycle time and tooling requirements of forming engine bores.
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