aluminum alloyhubThe traditional manufacturing methods include casting molding and spinning forming. Among them, casting molding can be divided into gravity casting and low pressure casting. According to different manufacturing processes, the hub can be divided into single piece (one piece), two piece type and three piece type Mode. The one-piece type is to place the entire aluminum ingot on the forging die for one extrusion molding (here, one time refers to the whole, not the number of times), the spokes and the basic shape of the rim are formed together, and the hub becomes a whole.
The two-piece type means that the rim and the spokes are forged separately, and the three-piece type means that the spokes and the rim are forged separately, and the rim is also forged in two parts. Among them, the three-piece rim should be welded and sealed as a whole to prevent leakage. Air, the spoke part and the rim should be fixed with screws.
Traditional multi-chipAluminum alloy wheelsSpokes and rims are connected by laser welding, welding or bolting. Among them, laser welding has the advantages of fast welding speed and high welding precision, but has the disadvantages of expensive welding equipment, high energy consumption, and prone to welding defects.
Friction stir welding is used to weld the wheel hub, which means that the spokes are placed in the rim, and the joints are squeezed by the high-frequency rotary welding head, so that the parts are melted and fused under high temperature, and the joints are connected due to thermal expansion and contraction.