A classification framework for identifying correlations between 3D surfaces in the context of sheet metal forming, especially Asymmetric Incremental Sheet Forming (AISF), is described. The objective is to predict “springback”, the deformation that results as a consequence of the application of a sheet metal forming processes. Central to the framework there are two proposed mechanisms to represe...

Springback is a common defect caused by elastic recovery in the plastic forming process, which can cause formed workpiece to deviate from target shape. The purpose of this paper grasp influence law process parameters on springback deviation so as optimize reduce springback. Taking Y-profile research object, such horizontal bending radius, vertical transition zone length, radius roller dies, and...

Fueled by pressures to reduce scrap and tooling costs, the modeling and prediction of springback has become a major focus of interest in sheet metal forming. Finite element codes and packages are being developed or improved but face the demand for higher predictive accuracy which, in turn, requires accurate property data and a more complete understanding of the stresses that are responsible for...

One of the biggest challenges in automotive industry focuses on weight reduction in sheet metal forming operations, in order to produce a high quality metal part with minimal cost production. Stamping is the most widely used sheet metal forming process; but its implementation introduces several difficulties such as springback and failure. A global and simple approach to circumvent these unwante...

The recently developed Spring Back Reflector has low stiffness in the deployed configuration. A general method of stiffening this type of reflector without changing its folding properties is presented. The stiffening is achieved by adding a conical skirt around the edge of the dish; this skirt snaps elastically when the dish is folded. The paper concludes that it is possible to design spring ba...

An intelligent V-bending process developed by the authors is briefly described and the importance of change in Young's modulus due to plastic deformation, which influences the amount of springback and therefore the accuracy, is emphasized. The change in Young's modulus in simple tension of a cold rolled steel sheet is experimentally investigated by affixing strain gauges on the specimen. It is ...

The study of deformability of metal sheets subjected to complex deformation states has become a topic of present interest; this fact is also a consequence of the emergence of new materials meant for auto bodies fabrication, whose forming processes imply knowledge about the influence of their modified mechanic characteristics on their behaviour during the deformation, and also on the quality of ...

Sheet metal forming is a major industrial process, mainly due to its cost efficiency after the establishment of the process design. However, the process design from tools geometry to load conditions is not straightforward, as a consequence of the side effects associated with sheet metal forming. The emphasis in this area goes to the springback effect or elastic recovery, which is one of the mai...

When a sheet metal forming operation, such as deep drawing, is followed by a trimming operation the numerical springback is influenced by various physical parameters and numerical factors. Two techniques of taking into the account the stress state change due to cutting in the FE plate model are discussed in the present paper. The first technique concentrates on the effect of the element mesh cu...

Abstract The use of advanced high-strength steels (AHSS) is associated with increased springback and represents a great challenge for today’s press shops regard to the dimensional accuracy cold-formed sheet metal parts. Springback, its appearance characteristics are mainly dependent on stress state introduced by forming process part geometry before opening tools. With aim determining influence ...