Investigating the Effective Parameters in the Spring Back of Two Layers Sheet Copper-Austenitic Stainless Steel in the Incremental Sheet Forming

The Incremental Sheet metal forming is one of the dieless forming processes. In this process, the ball nose tool runs the predetermined path to form the sheet by applying the local pressure on the sheet. One of the disadvantages of the incremental forming process is the springback phenomenon. In this paper, the effect of parameters on the springback in the two layear sheet Cu / Austenite St produced by the Single Point Incremental Sheet Forming has been investigated. The input parameters of this process include the tool diameter, vertical step, sheet thickness, depth of form, forward velocity, and arrangement of layers of the double layer sheet. Using the finite element simulation via Abaqus software and the Taguchi design of experiments method via Minitab software, the effect of input parameters on springback and forming force has been investigated. Also, the results of the simulation were validated by the empirical test and it was determined that the finite element has an appropriate overlap in extraction of the final results. At the end, the effect of each of the parameters mentioned on the springback and forming force was analyzed. It was determined that the thickness of the sheet had the greatest effect on both springback and forming force.