A flexible shear spinning of truncated conical shells with a general-purpose mandrel

An experimental study was conducted to survey the technological possibility of the die-less shear spinning of truncated conical shells with a cylindrical mandrel for general purposes using A1050-H and A1050-O commercially pure aluminum sheets of 1 mm thickness. It was clarified that there exist forming limits to prevent the occurrence of wall fractures and flange wrinkles during the die-less shear spinning process. The sine law was also realized in the die-less shear spinning. Truncated conical shells can be manufactured practically with a certain degree of accuracy by the die-less shear spinning with a cylindrical mandrel for general purposes.