Suspension system is an important part of modern automobile, which has a great influence on the ride comfort and handling stability of the vehicle.

The control arm (also known as swing arm) is the guide and force transmission component of automobile suspension system, which transfers various forces acting on the wheel to the vehicle body, and ensures that the wheel moves according to a certain trajectory. The vehicle control arm connects the wheel and the vehicle body elastically through the ball joint or bushing. The automobile control arm (including the bushing and ball joint connected with it) shall have enough rigidity, strength and service life.