METHOD FOR PRODUCING A PISTON WITH A COOLING DUCT
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United States of America Patent
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Apr 23, 2015
app pub date -
May 8, 2013
filing date -
May 11, 2012
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Abstract
A method for producing a piston with a cooling duct for an internal combustion engine, wherein a piston blank is provided with a collar protruding beyond the outer diameter of the later formed piston, and is formed on the piston blank by forging, spin-bending or the like. To form the cooling duct, a radially peripheral recess is introduced into the piston blank by forging, spin-bending or the like. In a further method step, a forming operation is performed on the collar, which together with the peripheral recess forms the cooling duct.
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