Balancing shaft and its forging method for engine

A technology of balance shaft and engine, applied in manufacturing tools, furnace types, furnaces, etc., can solve the problems of shortened service life, poor mechanical properties, poor metallographic structure of balance shaft forgings, etc., to prolong service life and improve metal structure. structure, the effect of improving mechanical strength

Inactive Publication Date: 2007-09-05
温州三联锻造有限公司
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  • Abstract
  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

Due to the large amount of impurities in the medium carbon steel material, the metallographic structure and

Method used

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Embodiment Construction

[0007] In the engine balance shaft of the present invention, the chemical composition of the engine balance shaft material is calculated by weight, and its composition is: 0.47-0.55% carbon (C), 0.17-0.37% silicon (Si), and 0.50-0.80% manganese (Mn) , 0.01-0.03% vanadium (V), 0.001-0.002% niobium (Nb), phosphorus (P) not more than 0.035%, sulfur (S) not more than 0.035%, copper (Cu) not more than 0.17%, the balance is iron (Fe). If the chemical composition of the aforementioned engine balance shaft material does not contain the two elements of vanadium (V) and niobium (Nb), the material is called No. 50 steel; if it contains the two elements of vanadium (V) and niobium (Nb), the The material is called special 50 steel.

[0008] In order to improve the mechanical strength of the balance shaft forgings, the crystal grains must be refined. Therefore, the special 50 steel is designed in an innovative way, that is, the metal elements vanadium (V) and niobium (Nb) are added to the 50 st...

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PUM

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Abstract

A balancing shaft of engine and its forging method are disclosed. The balancing shaft consists of carbon 0.47-0.55%, silicon 0.17-0.37%, manganese 0.50-0.80%, vanadium 0.01-0.03%, niobium 0.001-0.002%, phosphor<=0.035, sulfur<=0.035%, copper<=0.17% and iron residues. The process is carried out by cutting carbon steel, heating, blanking and forming to obtain blank, heating, blanking, cutting fringe and drawing slope, transferring by conveyor belt, cooling, heat treating, heat correcting and surface treating to obtain the final product. It has better quality and longer usage life, improves metal tissue structure, mechanical strength and impact toughness and saves energy resources.

Description

1. Technical Field [0001] The invention relates to a balance shaft for an automobile engine and a forging method thereof. 2. Background technology [0002] The balance shaft is a key component in the auxiliary balance mechanism next to the crankshaft of the automobile engine. When the crankshaft rotates, the crankshaft gear drives the balance shaft gear to rotate the balance shaft. At this time, the centrifugal force or torque generated by the balance weight on the balance shaft is balanced with the reciprocating inertial force or torque generated by the crankshaft. Due to the function of the balance shaft, the vibration and noise of the engine are effectively eliminated, the ride comfort is improved, and the durability of the car and the engine is increased. At present, the material used for the engine balance shaft and its forging method are: ordinary medium carbon steel is used to make balance shaft forgings through cutting, heating, billeting, forming, trimming, correction, h...

Claims

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Application Information

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IPC IPC(8): C22C38/12F16F15/26B21J1/00B21J5/00B21J1/06C21D9/28
Inventor 孙国奉张松满孙国敏张宣明杨春玥
Owner 温州三联锻造有限公司
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