METAL FORGED CRANKSHAFT, APPARATUS FOR METAL FORGING A CRANKSHAFT AND METHOD OF METAL FORGING A CRANKSHAFT
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United States of America Patent
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Issued Date -
Dec 30, 2010
app pub date -
Feb 29, 2008
filing date -
Feb 29, 2008
priority date (Note) -
Abandoned
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Abstract
An apparatus (30) for metal forging a crankshaft (100) having a plurality of throws (6, 7, 8, 9) having parallel axes (31, 32, 33, 34) comprises an upper die (40) and a lower die (50) each having cavities defining a negative shape of a corresponding half of the crankshaft (100). The two dies (40, 50) have mating surfaces (62, 63, 64, 65) lying on different parallel planes. A metal forged crankshaft (100) forged by such apparatus (30) comprises a plurality of throws (6, 7, 8, 9) having parallel throw axes (31, 32, 33, 34) lying in a same plane of symmetry (41) and split-lines (17, 18, 19, 20) from the forging process lying in planes (42, 43) substantially orthogonal to said plane of symmetry (41).
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