A flexible shear spinning of axi-symmetrical shells with a general-purpose mandrel

An experimental study is conducted to survey the technological possibility of the shear spinning of truncated hemispherical shells with a cylindrical mandrel for general purposes using A1050-H and A1050-O commercially pure aluminum sheets of 1 mm thickness. It is found that there exist forming limits to prevent the occurrence of wall fractures and flange wrinkles during the spinning process of truncated hemispherical shells. It is also found that the sine law is not realized exactly in shear spinning of truncated hemispherical shells with a cylindrical mandrel for general purposes due to the spring back of the workpiece.