Method for forging steering knuckle

Abstract

The invention discloses a method for forging a steering knuckle; the steering knuckle is prepared by steps of blank making, pre-forging, final-forging and edge trimming of a heated cylindrical blank, wherein (1) in the blank making step, carrying out upsetting treatment on one end of the cylindrical blank, and then flattening the end subjected to the upsetting treatment; (2) in the pre-forging step, forging the manufactured blank by using a closed die, and arranging a trimming cavity extending along the radial direction at a combination part between an upper die cavity and a lower die cavity of the closed die, wherein the periphery of the trimming cavity is connected with a combination surface between the upper die and the lower die; and (3) in the final-forging step, forging a pre-forged piece by using an open die. According to the method, the utilization rate of materials is greatly increased, the production efficiency is improved, and the rejection rate can be reduced.

Description

technical field [0001] The invention relates to a production technology of automobile components, in particular to a steering knuckle forging method. Background technique [0002] The automobile industry is the pillar industry of the national economy. The steering knuckle is an important part of the automobile, with many varieties and large consumption. At present, the production and manufacturing of blanks is mainly realized through forging. , final forging, edge trimming and shaping, while the shape of steering knuckle production is complicated, the processing is difficult, the material utilization rate is low, the production efficiency is low, and the scrap rate is high. The existing billet making process mostly uses air hammering at both ends of the billet to elongate, such as figure 1 As shown, and then press bending, although this billet making process can ensure that the shaft of the steering knuckle is full, it also has the disadvantages of cumbersome billet making ...

AI Technical Summary

Problems solved by technology

[0002] The automobile industry is the pillar industry of the national economy. The steering knuckle is an important part of the automobile, with many varieties and large consumption. At present, the production and manufacturing of blanks is mainly realized through forging. , final forging, edge trimming and shaping, while the shape of steering knuckle production is complicated, the processing is difficult, the material utilization rate is low, the production efficiency is low, and the scrap rate is high

The existing billet making process mostly uses air hammering at both ends of the billet to elongate, such as figure 1 As shown, and then press bending, although this billet making process can ensure that the shaft of the steering knuckle is full, it also has the disadvantages of cumbersome billet making process, low efficiency, and high labor intensity for workers. It is difficult to achieve one-fire forging, and it needs to be reheated to increase the cost of the product. At the same time, there are relatively small rounded corners at 7 bends after the billet is elongated, and it is easy to fold, which reduces the qualified rate of the product.

The current pre-forging process mostly uses open dies for forging. The forgings are squeezed by punching and forging to produce flashes. Trimming is required before final forging. Phenomenon, quality problems or waste products

Images