An analytical method for prediction of the incremental sheet metal punching process

Incremental forming process is a method for rapid prototyping and low-volume production. Recent ideas have been introduced as “incremental sheet metal punching.” In this study, a new analytical modeling of the process with respect to the forming mechanism and slip line field has been presented. The analysis sheet formation in this process can be divided into two stages: penetration and curve making. At the penetration stage, both approaches of the upper bound method and slip line field were used to calculate the pressure and velocity of the punch. At the second stage, the estimated slip line field was assumed for curve making. This leads to making a suitable prediction with good accordance. Furthermore, the effects of some parameters such as punch diameter and depth on the punch pressure have been evaluated.