Process for forging rear axle shaft flange of automobile

Abstract

The invention discloses a process for forging a rear axle shaft flange of an automobile. The process comprises the following steps of: heating a round bar to the temperature of between 1,150 and 1,250 DEG C; upsetting and blanking the round bar on a horizontal forging machine by using a mold cone cavity so as to form a rear axle shaft middle blank of the automobile, wherein the rear axle shaft middle blank of the automobile is provided with a round table-shaped part which has a thicker front part and a thinner rear part, the length-to-diameter ratio of the round table-shaped part is 0.9 to 1.5, and the diameter is an average diameter of the round table-shaped part; controlling time for an upsetting and blanking process; keeping the temperature of the rear axle shaft middle blank of the automobile to be between 1,000 and 1,100 DEG C; and performing pendulum grinding and molding on the rear axle shaft middle blank of the automobile directly on a pendulum grinding machine so as to obtain the rear axle shaft flange of the automobile. The process has the advantages of improving the production efficiency of forging the rear axle shaft flange of the automobile, along with small required blanking and forging equipment, a small amount of scale produced by heating a forging piece, better surface quality of the forging piece, and the uniform deformation and high dimensional accuracy of the forged rear axle shaft of the automobile.

Description

technical field [0001] The invention relates to a forging process for automobile forgings, in particular to a forging process for a rear axle axle flange of an automobile, which is formed by forming blanks on a flat forging machine and pendulum rolling on a pendulum mill. technical background [0002] The rear axle shaft of the automobile is the direct drive for the rotation of the wheels and an important part for the torque transmission of the automobile. When the car is running, the torque output by the engine is transmitted to the half shaft of the rear axle of the car through multi-stage transmission, and then transferred to the wheels by the half shaft of the rear axle of the car to push the car forward or backward. Therefore, the half shaft of the rear axle of the car is working It has the function of bearing impact, alternating bending fatigue load and torsion, which requires the rear axle axle of the automobile to have sufficient bending strength, shear strength and ...

AI Technical Summary

Problems solved by technology

[0003] At present, the forging process of the semi-shaft flange of the rear axle of the automobile using the pendulum mill is mostly a secondary fire process. After the first heating of the semi-shaft blank of the automobile rear axle, the billet is made by free forging or hydraulic press and other equipment, and the billet making time is longer. The workpiece dissipates heat quickly during blank making, causing the temperature of the blank to drop to about 600°C after the first heating, and the plasticity of the blank is reduced, which cannot meet the requirements of the pendulum milling process. secondary heating

This process has problems such as large scale of forgings, poor surface quality of forgings, high production costs, and low production efficiency.

Images