Forming of a cylindrical cup in 7075-T6 under warm temperature conditions

• Published in: IOP Conference Series: Materials Science and Engineering
• Main Authors: Royne, S, Laurent, H, Maillard, A
• Other Authors: Institut de Recherche Dupuy de Lôme (IRDL), École Nationale d'Ingénieurs de Brest (ENIB)-Université de Bretagne Sud (UBS)-Université de Brest (UBO)-École Nationale Supérieure de Techniques Avancées Bretagne (ENSTA Bretagne)-Centre National de la Recherche Scientifique (CNRS), CEntre Technique des Industries Mécaniques (CETIM), CEntre Technique des Industries Mécaniques - Cetim (FRANCE)
• Format: Conference Object
• Language: English
• Published: HAL CCSD 2023
• Subjects: [PHYS.MECA]Physics [physics]/Mechanics [physics]; Luleå
• Online Access: https://hal.science/hal-04650009; https://doi.org/10.1088/1757-899X/1284/1/012026

International audience Abstract The high mechanical properties of aluminum alloys are very interesting for reducing the weight of parts in the automotive sector. However, a formability issue prevents the use of these alloys at room temperature especially for complex shapes where part failure occurs before full drawing. The use of a warm forming process, which consists of heating the part between 150°C and 250°C for aluminium alloys, allows to increase formability and therefore to perform complex shapes. In this study, the forming of a cylindrical cup in 7075-T6 is carried out at 200° C in two steps by two successive reductions in the diameter of the blank. Numerical simulations of these two forming steps are performed with Abaqus. The influence of friction coefficient is analysed in these two forming steps by comparing the evolutions of punch force.