Reference

(1) M. Weber, 'Comparison of Advanced Procedures and

Economics for Production of Connecting Rods',

Powder Metallurgy International, Vol. 26, No. 3,

(1993), pp. 125-128.

(2)M. Weber, 'Powder Forging of Automotive

Connecting Rods', Paper C427/31/227, Seminar 31,

Autotech 1991, I. Mech. E.

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外文原文：

The role of link

The role of the piston rod to withstand the force passed tothe crankshaft, and to the reciprocating piston motion into rotary crankshaft motion.Body by the connecting rod connecting rod, connecting rod cap, connecting rod bolts and connecting rod bearing and other parts, connecting rod connecting rod body and the connecting rod cap into a small head, shaft and connecting rod. Connecting rod small end is used to install the piston pin to connect the piston.  Connecting rod is connected with the crankshaft rod journal.Generally made of separate type, and cut half of the known link shaft cover, both by the connecting rod bolts into one. Installed in the connecting rod connecting rod bearing hole in the seat, and crank mounted on the rod journal and together, the engine of the most important one with the vice. Used mainly by run whte gold alloy, copper-lead alloy and aluminum alloy. 

Linkage in both ends of the hinge with the active and driven components to transmit motion and power bars.  For example, in power machinery and reciprocating piston compressor with a piston and connecting rod to crank. Mostly steel rod, the main part of the multisection-shaped or round, both ends of the hole,  hole fitted with bronze bushings or needle bearings for the load axis constitute hinge pins. Automobile engine connecting rod is an important part, which connects  the piston and crank shaft, its role is to piston reciprocating movement into rotary crankshaft motion,and the force acting on the piston to the crankshaft output power  to pass. Link at work, in addition withstand  the pressure generated by gas com bustion, but also to withstand the vertical and horizontal inertia force. Therefore,  the connecting rod in a complex state of stress at work. Both subject to alternating tension and compression stress, at work. Both subject to alternating tension and compression stress, but also by the bending stress. The main damage to the rod form of fatigue fracture and excessive deformation. Usually the site of fatigue  fracture in the connecting rod on the three high-stress areas. Working conditions require connecting rod connecting rod has higher strength and fatigue resistance; and requires  a sufficient rigidity and toughness. connecting  rod in its traditional materials processing technology commonly  used 45 steel, 40Cr or 40MnB other quenched and tempered steel.

Automobile engine connecting rod is the important parts,it connects the piston and crankshaft, and its function is to change the reciprocating motion  of the piston to the rotarymotion of the crankshaft, and the role of the force on the piston to the crankshaft output power.  The connecting rod in work, except under pressure from the gas  combustion chamber, and bear the lateral and longitudinal inertial force. Therefore, the connecting rod in a complex stress state work. It is influenced by  both the alternating compressive stress, and again by bending stress.

The main damage form is connecting rod fatigue fracture and excess deformation. Usually the fatigue fracture  of the parts of the connecting rod is three high stress area. The connecting rod working conditions demand connecting  rod with high strength and antifati -gue performance; And with adequate rigidity and toughness. The traditional processing technology of the material in connecting general use  45 steel, 40 Cr or 40 MnB etc, but now the  tempering steel foreign widespread USES advanced connecting rod cracking (conrod fracture splitting) processing technology  requirements brittleness is bigger, hardness higher,therefore, the German auto enterprise production of new  materials for connecting rod C70S6 high carbon micro alloy steel, not the SPLITASCO series forging steel, frACTIM forging steel and S53CV-FS forging steel etc (above all on German din standards). Although have the high strength steel, but on the stress concentration is very sensitive. So,  in the connecting rod appearance, transition round, etc, must strictly requirements should also pay attention to the surface processing quality in order to improve the fatigue strength, otherwise the application of high strength steel alloy and can't achieve expected fruit.