The study is concerned with the analysis of redrawing for the prediction of limit drawing ratio and forming load.
The direct redrawing process is analyzed by using an equilibrium approach both for non-workhardening material and for workhardening material. Computations are carried out numerically for the workhardening case. The predictions of limit drawing ratio and forming load are then compared with the experimental results.
For the ordinary lubricated conditions, the comparison shows reasonable agreement between the theory and experimental observation. It is also shown that limit drawing ratio can be increased by using a greater die angle and proper lubrication significantly reduces the punch load.
