METHOD OF MANUFACTURING CONNECTING ROD BY USING SEMI-CLOSED SINTER FORGING
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United States of America Patent
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Sep 3, 2015
app pub date -
Nov 29, 2014
filing date -
Mar 3, 2014
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Abstract
Disclosed is a method of manufacturing a connecting rod by using semi-closed sinter forging. The method includes: a first step of positioning a metal powder of a sintering material in a closed mold and then forming a preliminary formed body by using a general forming press; a second step of heating the formed preliminary formed body to sinter the preliminary formed body; a third step of semi-closed forging the sintered preliminary formed body to manufacture a forged part; a fourth step of cooling the manufactured forged part to normal temperature; a fifth step of removing a flash from the cooled forged part through a punching process; and a sixth step of manufacturing the connecting rod through a shot blast treatment in order to remove a foreign substance existing on a surface of the forged part from which the flash is removed.
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