Abstract
Flow forming is an effective process for the manufacturing of thin-walled seamless tubes. It has been found that a number of parameters affect the quality and dimensional precision of flow-formed tubes. In this study, the required flow forming tools are manufactured. The out-of-roundness of an annealed and flow-formed AISI 321 steel tubular pre-form is investigated for various levels of effective process parameters experimentally. Taguchi’s method is employed to design of experiments (DOE). The parameters considered are the feed rate, the depth of cut and the roller attack angle. The effects and contributions weight and interaction effects of these parameters on the out of roundness as response function are analysed. It is found that the depth of cut is the most important process parameter affecting out of roundness. The out-of-roundness decreases with increase in the depth of cut and it increases with increase in the feed rate and roller attack angle.