Technological Representation of Forming Limits for Negative Incremental Forming of Thin Aluminum Sheets

The purpose of the study is to describe the effect on formability of various process parameters. The results of several experiments and some theoretical developments are presented. The investigation is used to propose a new space for representation of forming limits, based on technological parameters, alternative to the frequently used forming limit diagram (FLD). The validity of the proposed formability space has been tested by means of a statistical tool called binary logistic regression.