Method and production line for forging forged piece of automobile rear axle driving spiral bevel gear

Abstract

The invention relates to a method and a production line for forging a forged piece of an automobile rear axle driving spiral bevel gear. The method comprises two processes, namely performing roll forging to prepare a blank and performing finish forging to mold, wherein the process of performing roll forging to prepare the blank comprises four roll forging steps; and the process of performing finish forging to mold comprises the following steps of: placing the fourth working position roll forged piece in a finish forging mold die, molding by downwards gathering the blank along the inner wall of the cover die under the pressure of a male die, and jacking the forged piece out with a jacking rod after the forged piece is de-molded. The production line comprises a roll forging machine and a press machine, wherein four sets of fan-shaped dies are arranged on an upper shaft roller and a lower shaft roller of the roll forging machine, and the process of performing roll forging to prepare the blank is finished through the dies to obtain the fourth working position roll forged piece; a sleeve forging die is arranged on the press machine and is a die cavity mainly comprising a female die, the male die, the cover die and the jacking rod, and the process of performing finish forging to mold the fourth working position roll forged piece is finished through the die cavity to obtain the forged piece, namely the forged piece of the automobile rear axle driving spiral bevel gear. In a forging production process, the method and the production line have the advantages of low noise, high production efficiency, high material utilization rate and the like.

Description

technical field [0001] The invention relates to a method and production line for forging a driving spiral bevel gear forging of an automobile rear axle. Background technique [0002] The driving spiral bevel gear of the automobile rear axle is one of the key parts for the power transmission of the main gearbox of the automobile rear axle. It is manufactured by cutting the forging. The quality of the forging directly affects the service life of the parts. Such as figure 1 . At present, the main production method and production line for producing the forgings of the active spiral bevel gear of the automobile rear axle are: drawing on the hammer, forming by die forging with a die forging press. The main disadvantages of this process are: [0003] (1) The length of the hammer is forged by striking force. The tonnage of the equipment is high, the noise is loud, the number of blows needs to be many, the production efficiency is low, the working environment is poor, the surface o...

AI Technical Summary

Problems solved by technology

[0003] (1) The length of the hammer is forged by striking force, the tonnage of the equipment is high, the noise is loud, the number of blows needs to be many, the production efficiency is low, the working environment is poor, the surface of the formed blank is rough, and the straightness is very low

[0004] (2) General die forging is prone to bending during forging and forming, resulting in large flash, which reduces the utilization rate of materials

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