LAUSR

Springback is a significant problem in the sheet metal forming process. When the tools are released after the stage of forming, the product springs out, because of the action of the internal stresses. In many cases the deviation of form is too large and the compensation of the springback is necessary. The precise prediction of the springback of product is increasingly significant for the design of the tools and for compensation because of the higher ratio of the yield stress to the elastic modulus. The main objective of this study is to bring solutions to the problems involved in deformation of metals, and quote the problems of cracking at the time of working. This paper focuses on two essentials parts: in the first part a lot of effort was made by adapting a new U-type stretching-bending device on a tensile testing machine. This apparatus was built and improved to incorporate a number of new features that are motivated by theoretical analysis. Therefore, the second part of this experimental study will investigate the influence of anisotropy grains orientation for Aluminum alloys, and Steel metals on the springback drawing some conclusions how to concept deep drawing tools, to investigate defaults that are showed under this process and the effect of heat treatment on the reduction of springback. From these experiments results, we can conclude that the heats treatments on the springback have a strong influence for aluminum alloys than the steel. Both the temperature and the laminate process must be considered to predict and to improve the springback under stretch bending process. Finally, the conducted work represents a fundamental contribution in industry applications and enabled us to quantify and improve the springback.