At present, there are many manufacturing methods of automobile wheel hub. The traditional manufacturing method of wheel hub is mainly based on casting technology, which is integral casting. In the casting process, the wall thickness of wheel hub itself is not completely uniform. For example, the wall thickness at the joint of wheel disc and wheel flange is greater than that of the outer wall of wheel flange. In the solidification process of aluminum alloy melt, the solidification time of the area with larger wall thickness is longer Thermal connection effect and thermal stress, resulting in wheel hub, the next small series will take you to understand the manufacturing method and process of aluminum alloy hub.

　　A new manufacturing method of wheel hub has appeared, which is to bend the aluminum alloy plate into a ring, then weld the two ends of the aluminum alloy plate, and then roll it into a rim, and then fix another disc on the rim. In this method, the rim manufactured is not only difficult to reach the standard round shape, but also the rim is welded, which will make the joint material deteriorate and the stress is concentrated on the joint It leads to poor mechanical properties.

　　The aluminum alloy wheel hub is characterized by: heat treatment of aluminum rod, the heated aluminum rod is extruded into a tube through an extruder, the pipe is cut into a cylinder of corresponding size according to the wheel hub size, and the cylinder body is rotated into a rim by the spinning machine by using the heating spinning method, and the prefabricated wheel disc is fixed on the edge of the wheel disc.

　　The cylinder is directly extruded by extruder. Compared with the way of bending the plate into the cylinder, the produced cylinder has higher concentricity, and the output hub has higher concentricity. In addition, due to the absence of hot seam effect in the casting process, the stress concentration of welding method and the existence of air hole in the weld seam effectively improve the mechanical properties and anti leakage performance of the hub.