Method of manufacturing connecting rod by using semi-closed sinter forging
A semi-closed, connecting rod technology, used in connecting rods, rotating parts that resist centrifugal force, bearings, etc., can solve problems such as deterioration of mechanical properties, and achieve the effect of improving mechanical properties and reducing manufacturing costs.
Inactive Publication Date: 2015-09-09
HYUNDAI MOTOR CO LTD
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However, the mechanical properties may be poor due to the absence of metal flow in them
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[0058] Hereinafter, the present invention will be illustrated in more detail by way of examples. These examples are only for illustrating the present invention, and it is obvious to those skilled in the art that the scope of the present invention should not be construed as being limited by these examples.
[0059] The yield strength and tensile strength of the examples manufactured by the method of manufacturing connecting rods using the semi-closed sintered forging method according to various exemplary embodiments of the present invention were compared with those manufactured by using the sintered forging method in the prior art. The yield strength and tensile strength of Comparative Examples were compared.
[0060] [Table 1]
[0061] Classification
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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.
Description
[0001] Cross References to Related Applications [0002] This application claims priority based on 35 U.S.C. §119 from Korean Patent Application No. 10-2014-25174 filed with the Korean Intellectual Property Office on March 3, 2014, the disclosure of which is incorporated herein by reference in its entirety. technical field [0003] The invention relates to a method of manufacturing a connecting rod for connecting a piston and a crankpin of a vehicle engine. Specifically, the connecting rod manufacturing method can provide improved yield strength, tensile strength, etc., by using semi-closed sintered forging including a step of forming a preliminary formed body, a step of sintering , forging steps, etc. Background technique [0004] Vehicle production technologies have been continuously developed so as to achieve many purposes of diversification, high performance, and high quality that meet customers' current needs. Furthermore, manufacturing costs have been significantly ...
Claims
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IPC IPC(8): B22F3/17
CPCB22F3/12B22F3/24B22F2003/248B22F2003/247B22F3/17B22F5/00F02F3/0015B22F3/1007B22F2003/033B22F2998/10B22F2999/00F16C7/023F16C2220/20F16C2220/46F16C2223/08B22F3/02B22F2203/11B22F2201/013B22F2201/02
Inventor 金鹤洙郑富龙
Owner HYUNDAI MOTOR CO LTD