Effect of single point incremental forming parameters on spring back and micro-crack density

Abstract

In this paper Single Point Incremental Forming (SPIF) process was applied without using a dedicated die depending on Iso-planar tool path. The aim of this work is to study the effect of forming parameters (incremental step size, product angle and tool rotational speed) on the spring back of wall angle and micro crack density of truncated cone made from low carbon steel workpiece (1008-AISI). The Box-Behnken design of experiment was used in this study. The results show that the incremental step size has the great significant on wall angle spring back among the other parameters and the wall angle of product was the great significant on micro crack density. The contribution percent of (incremental step size, rotational speed and wall angle) on spring back were (33.81, 30.11 and 20.46) % respectively and on micro crack density were (21.99, 15.19 and 40.64) % respectively.