Patent ID: 7131305

Claim:
An apparatus for spin forming a portion of a workpiece, comprising: a carrier rotatable about a spin axis; at least a first roller and a second roller operatively supported on said carrier, said first roller being radially and axially offset from said second roller, said first and second rollers radially movable toward and away from the spin axis; a rotational drive mechanism having an axial drive shaft for spinning said carrier about a spin axis; a radial drive mechanism for radially translating said first roller and said second roller toward and away from the spin axis to position said rollers for a forming pass, wherein said radial drive mechanism further comprising: a shaft supported coaxially by said axial drive shaft, radially inboard of said first and second rollers, for guided movement along said spin axis; an actuator for moving said shaft along said drive shaft coaxial to said spin axis; and a translation mechanism operable between said shaft and rollers for translating the axial motion of said shaft into radial motion of said rollers; and an axial drive mechanism for reciprocating one of said first and second rollers or workpiece along a spin axis to sequentially engage said first roller and then said second roller to the workpiece where said first roller and said second roller sequentially reduce the diameter of a portion of the workpiece during a forming pass.