Aluminum alloy control arm
The car control arm is also called the swing arm, which is an important part of the car chassis system. Its comprehensive mechanical properties play a vital role in the safety and stability of the vehicle. It is generally made of 6082 aluminum alloy. The control arm is divided into a front control arm and a lower control arm. The front control arm is the guide and support of the suspension, and its deformation will affect the positioning of the wheels and reduce the driving stability; the lower control arm is mainly used to support the body and the shock absorber And cushion the vibration during driving.
Early control arms were mostly made of cast iron, cast steel or steel plate by stamping and welding. With the improvement of material processing technology, forged aluminum alloy control arms are gradually replacing steel control arms, and they have been applied in batches on medium and high-end vehicles at home and abroad. Such as Japanese Sylphy, Qashqai, Qijun, Korean Langdong, American Aiweiou, Carnival, European Sagitar, Passat and so on. The typical forging process of an aluminum alloy control arm generally includes blanking, heating, blanking, forming, trimming, heat treatment and surface cleaning processes. Among them, the billet making process can adopt roll forging, diagonal cross rolling and other methods according to the different product shapes and structures. Some products also need to be bent and pre-forged to reduce the difficulty of final forging. The heat treatment is generally solid solution and aging treatment to improve the mechanical properties of the product, and the surface cleaning can be shot blasting or sandblasting to remove the oxide scale on the surface of the workpiece and improve the mechanical properties of the workpiece.
Steering Knuckle
The steering knuckle is a key structural component in the front axle assembly and the front suspension system of the car. It connects the front axle and the steering system. It not only carries the full weight of the car and transmits steering power, but also bears the impact from the ground and the lateral braking of the wheels. The load generated by the vehicle is a strong guarantee for the safety of the car during driving. The steering knuckle is a complex shape security part in the automobile chassis parts.
The forging process of aluminum alloy steering knuckles generally includes blanking, heating, billeting, pre-forging, final forging, trimming, heat treatment and surface cleaning processes. Depending on the structure and forming difficulty of the product, it can be heated once or multiple times. The heating process can be before any process of billeting, pre-forging and final forging. The heat treatment generally also adopts solid solution and aging treatment.
Conclusion
The application of aluminum alloy forging technology in the automotive industry is gradually increasing. However, due to the high price of automotive aluminum forgings, which are mainly used in high-end models, the total market demand is not large, and because there are many OEMs that have the right to speak in the international market. For foreign companies, it is difficult to enter the supplier system. Most domestic companies producing aluminum alloy forgings can only provide products for the after-sales market. The product quality requirements are not high, and they lack the motivation to continuously improve aluminum forging technology. With the continuous development of automobile lightweight and electrification, global automobile manufacturers are facing increasingly fierce competition and cost pressures. More and more aluminum forging products will be directly produced in China, providing domestic enterprises with aluminum forging production capacity. Provides unprecedented development opportunities.