Method for producing a camshaft for an internal-combustion engine
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United States of America Patent
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Nov 13, 2018
Grant Date -
Dec 3, 2015
app pub date -
Jul 4, 2013
filing date -
Dec 20, 2012
priority date (Note) -
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Abstract
A method for obtaining a camshaft for an internal-combustion engine having a structure made of a single piece includes obtaining the camshaft by starting from a metal tubular element. The cams are obtained by expanding the tubular element within a die using high-pressure fluid. The tubular element can have an enlarged thickness in portions that are to form the cams. Forming with high-pressure fluid can be obtained using gas or liquid (for example, water or oil) at high pressure, at room temperature or at a higher temperature. The piece obtained is subjected to thermal treatment and to a grinding operation.
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