42nd International Deep Drawing Research Group Conference - IDDRG 2023

The geometrical accuracy of the bent components as well as their surface quality are crucial parameters to evaluate the feasibility of a bent geometry in free-form bending. In the process the deformation of the part is obtained by displacing and rotating a movable bending head with respect to the fixed holder with a given relative velocity with respect to the feed velocity. High process...

In this paper, the AUTOFORM stamping simulation software is used to analyze the formability and springback of A pillar part, and the influence of part features on springback and its robustness was studied. The results show that when stamped with the third generation advanced high strength steel QP1180, the maximum local thinning rate of the part is 0.157 without cracking risk. And the maximum...

Lightweight materials and lightweight technologies gained significant attention from all EV vehicle manufacturers. Aluminium has been commonly used as a lightweight replacement for steel in the automotive industry for many years. High-strength aluminium alloys have high specific strength, and their formability increases significantly at elevated temperatures. New manufacturing technologies...

Appearance of an automobile is one of the appealing points to customers. Character lines in outer panels such as hood and door panels play an important role to make automobiles attractive, and a sharp character line which has a ridge of small curvature radius is much more preferred to a blunt character line. However, a skid line, a kind of appearance defect, is apt to generate along the...

Paint appearance is an important requirement for outer automobile panels. Since the last decade automotive manufactures start reducing paint thickness for environment issues. As a result, the surface roughening of steel substrate due to stamping becomes a critical factor for paint appearance. Although many research work has been conducted on surface roughening, limited research has been...

High-strength aluminum alloys have drawn a lot of attention because of the expanding demand for lightweight vehicle design in the automotive sector. Due to poor formability at room temperature warm and hot forming have been advised. However, warm and hot forming methods need more steps in the production process and an advanced tooling system. In contrast, since ordinary tools can be used,...

Both advanced high strength steels and aluminum alloys gained increasing popularity because of the constant effort to meet the social pressure of reducing the vehicle weight while keeping their safety. The ratio between material strength and weight is much higher when compared to other materials, while the ductility is similar. Thus, the high springback after forming is one of the...

The present study is concerned with the prediction of deformation in incremental sheet forming (ISF) for a Ti6Al4V sheet. To investigate anisotropic and asymmetric behaviors, uniaxial tension and compression tests were conducted along the rolling direction (RD), diagonal direction (DD), and transverse direction (TD). A representative yield function for a HCP material, the...

The hairpin is a crucial component of the drive motor of an electric vehicle, consisting of a copper coil and a very thin enamel layer. It is manufactured using successive forming processes due to its complex shape. After the forming processes, springback is inevitably observed, which causes critical issues in fabricating the drive motor. Compensating for springback is a time and...

A developable surface is one that can be flattened into a plane without distortion. Thin sheet metal is often treated as a developable surface. The classical theory of folded developables proves that curved crease, origami-style folding can be applied to thin sheet metal of high strength to manufacture parts with rather complex geometries. However, its applications are found to be limited to...