56 to drive the upper press head assembly 58 to move downward along the axial direction of the vertical cold rolling and roll forming machine until the wheel blank is pressed tightly by the convex roll forming mould 510 3 controlling the hydraulic motor s to drive the lower transmission assembly 55 and the upper press head assembly 58 to rotate synchronously in order to rotate synchronously the convex roll forming mould 510 the concave roll forming mould 511 along with the wheel blank 4 controlling the oil cylinders for the lateral pressing rollers to drive the lateral pressing roller assemblies to move in the radial direction i e a horizontal direction of the circumference in order to apply a deformation force onto the lateral wall portion of the wheel blank meanwhile controlling the hydraulic motor s for the lateral pressing rollers to drive each lateral pressing roller assembly to rotate around the axis thereof until the roll forming process is completed b 8 extruding a center hole 13 as shown in fig1 b 9 extruding screw holes 14 as shown in fig1 b 10 extruding air holes 15 as shown in fig1 b 11 compressing and shaping placing the wheel blank between a concave shaping mould 17 and a convex shaping mould 16 and pressing the wheel blank in the axial direction of the wheel blank with the concave shaping mould 17 and the convex shaping mould 16 while pressing the primary wheel rim of the wheel blank in the radial direction of the wheel blank by using a lateral pressing shaping mould 18 in order to form a one piece weldless wheel made of metal sheets.