The flywheel is formed in one piece, the thinner raw material is extruded through the side to thicken, and then machined to produce the flywheel. This process ensures that the core is thin and the edge reaches more than 2 times the thickness of the core. While reducing the weight of the flywheel, ensure the thickness of the gear. Therefore, the material is required to have high plasticity, so as to ensure that the rotary extrusion process does not crack. Valve rocker arm: the engine does work once, and the valve rocker arm needs to work continuously for 4 times, and needs to withstand higher pressure, so the material is required to have high wear resistance and excellent fatigue life.

The slide rail is an important mechanical part of the car seat, to meet the safety, connection, support, adjustment and other four key characteristics, while considering the strength of the slide to take into account the weight (energy saving for the vehicle), the slide rail materials are mostly high-strength or ultra-high strength steel, generally tensile strength above 500MPa, some even reach 900MPa, and the material strength is uniform. The strength of the strip head, middle and tail, as well as the longitudinal, transverse and 45 degree directions, is stable to ensure the stable quality of the slide forming and subsequent welding and assembly.

The gear ring of synchronizer is the key part of shifting operation in the gearbox of automobile. The traditional process is forged with copper alloy, which has high cost and low forming efficiency. The new process adopts high quality low alloy structural steel 16MnCr5 fine punching forming, which can mass produce more complex gear ring parts, and after nitriding treatment, can greatly improve the wear resistance of the material surface.