METHOD FOR PRODUCING FORGED CRANKSHAFT
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United States of America Patent
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Issued Date -
Apr 16, 2020
app pub date -
Dec 21, 2016
filing date -
Dec 25, 2015
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Abstract
Disclosed is a method for producing a forged crankshaft. This production method includes: a pressing step of pressing a part in a longitudinal direction (first region) of a bar-like member with a pair of first dies, thereby decreasing a cross sectional area of the first region; and a decentering step of decentering a second region of the bar-like member with a second die with the first region being held. The second region is at least a part of the region of the bar-like member excepting the first region. The decentering direction by the second die is a direction perpendicular to each of the pressing direction by the first dies and the longitudinal direction of the bar-like member.
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