Method for manufacturing special vehicle wheels with 7000 series aluminum alloy

A method for manufacturing special purpose vehicle wheels using 7000 series aluminum alloys, wherein the method comprises the following steps:

• Step 1, smelting 7000 series aluminum alloys in a smelting furnace to obtain a solution;
• Step 2, making the solution obtained in step 1 into an aluminum alloy ingot blank through a spray forming process;
• Step 3, extruding the aluminum alloy ingot blank of step 2 to obtain an extrusion bar;
• Step 4, sawing the extrusion bar into blanks and heating them;
• Step 5, putting the blank into a rotary forging press and rotary forging the blank into a cake;
• Step 6, putting the cake into a press for forging and forming;
• Step 7, performing spinning and forming on a wheel rim initially formed in step 6;
• and
• Step 8, performing solid solution, quenching process and ageing treatment sequentially on the wheel rim,
• wherein during the quenching process, the wheel rim is swung up and down for more than 30 times,
• wherein step 6 comprises an initial forging process and a final forging process, the initial forging process is carried out in an initial forging press, and the spokes, wheel rims and windows are initially formed, and
• the final forging process is carried out in a final forging press, and the spokes and windows are completely formed,
• wherein a trimming and reaming process is further included between step 6 and step 7.