Tool-transition-free machining method and clamp for wheel outer rim

A tool-transition-free machining method for a wheel outer rim comprising:

• first, a primary turning is conducted, then holes are drilled out by a machining center, and finally a secondary turning is conducted,
• wherein during the primary turning, an outer rim from the inner flange to the outer wheel edge is roughly turned, and after the outer rim is roughly turned, 0.2-0.3 mm of process redundancy is reserved for fine turning, and
• wherein during the secondary turning, a flange surface machined by primary turning is used for radial positioning, the center hole machined by primary turning is used for radial positioning, an inclined surface on the upper portion of a straight table of the center hole machined by primary turning is used for compression, then the outer rim which is not machined during primary turning is roughly turned at first and 0.2-0.3 mm of process redundancy is reserved, finally, the whole wheel outer rim is finely turned once or twice, so that the whole outer rim is machined in one effort.