METHOD FOR MANUFACTURING ONE-PIECE WHEEL HAVING HOLLOW STRUCTURE FOR REDUCING NOISE, AND ONE-PIECE WHEEL USING SAME
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United States of America Patent
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Issued Date -
Dec 22, 2022
app pub date -
Feb 27, 2020
filing date -
Feb 27, 2020
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Abstract
The present disclosure provides a method of manufacturing a one-piece wheel having a hollow structure for noise reduction. At least one embodiment of the present disclosure provides a method of manufacturing a one-piece wheel having a hollow structure for noise reduction, the method comprising: fabricating, by using one or both of gravity casting and low-pressure casting, an integral casting in which a disk portion and a wheel rim portion are integrally formed, wherein the rim portion includes an annular protrusion radially protruding from an outer circumferential surface; forming at least one cavity by bending the annular protrusion through flow forming to provide a bending portion, resulting in the cavity using the bending portion and one side of the disk portion; and performing a friction stir welding between the one side of the disk portion and one end of the bending portion.
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