Zerrendatu honen arabera: egilea "84a86375a35255808eece13c87e3db76"
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AA5754 aluminium alloy springback reduction by post forming electro plastic effect (PFEPE)
Otegi, Nagore; Trinidad Naranjo, Javier; Barrenetxea, Manex; Aizpuru, Iosu; Mendiguren, Joseba (Elsevier, 2024)Post Forming Electro Plastic Effect (PFEPE) has been proposed as a promising technology for mitigating forming forces and addressing springback challenges in the metal forming industry. However, several research gaps remain ... -
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Agirre, Julen; Otegi, Nagore; GALDOS, Lander; Arrese Irazabal, Peio (UEU, 2021)Hammer forging is a widely employed manufacturing process to produce parts with excellent mechanical properties. In order to achieve an optimal process design, finite element modelling is broadly utilized in industry and ... -
An automatic thermo-mechanical testing apparatus for metal forming applications
Agirre, Julen; Abedul Moreno, David; Sáenz de Argandoña, Eneko; Otegi, Nagore; GALDOS, Lander; Erice, Borja (Elsevier, 2023)Dynamic testing of materials is necessary to model high-speed forming processes (e.g. hammer forging, blanking, forming, etc.) and crash/impact behaviour of structures, amongst others. The most common machines to perform ... -
Contact pressure, sliding velocity and viscosity dependent friction behavior of lubricants used in tube hydroforming processes
GALDOS, Lander; Otegi, Nagore; Mendiguren, Joseba; Trinidad Naranjo, Javier; Sáenz de Argandoña, Eneko (2021)The final quality of sheet and tube metal formed components strongly depends of the tribology and friction conditions between the tools and the material to be formed. Furthermore, it has been recently demonstrated that ... -
Drawbead uplift force analytical model for deep drawing operations
Gil, Imanol; GALDOS, Lander; Mendiguren, Joseba; Otegi, Nagore; Sáenz de Argandoña, Eneko (IOP Publishing Ltd., 2018)Drawbead uplift force calculation has been an open issue among the deep drawing tool maker and software developers in the last years. Starting from the original work of Stoughton (1988) many have been the models presented ... -
Friction Modelling for Tube Hydroforming Processes : A Numerical and Experimental Study with Different Viscosity Lubricants
GALDOS, Lander; Trinidad Naranjo, Javier; Otegi, Nagore; García-Crespo, Carlos (MDPI, 2022)The final quality of sheet and tube metal–formed components strongly depends on the tribology and friction conditions between the tools and the material to be formed. Furthermore, it has been recently demonstrated that ... -
High-temperature tribological performance of functionally graded Stellite 6/WC metal matrix composite coatings manufactured by laser-directed energy deposition
Zabala, Alaitz; Llavori, Inigo; Otegi, Nagore (Springer, 2024)Wear-driven tool failure is one of the main hurdles in the industry. This issue can be addressed through surface coating with ceramic-reinforced metal matrix composites. However, the maximum ceramic content is limited by ... -
The influence of the kinematic hardening on the FEM simulation of Tension Levelling Process
Garcia, Aitor; Trinidad Naranjo, Javier; Otegi, Nagore; Mendiguren, Joseba; Sáenz de Argandoña, Eneko; GALDOS, Lander (Elsevier Ltd., 2020)Tension levelling is used in the steel industry to remove shape defects present in cold rolled strip. This technology is increasingly being employed by steel makers to level AHSS steels, because conventional roll levelers ... -
Monitoring of a Hammer Forging Testing Machine for High-Speed Material Characterization
Agirre, Julen; Otegi, Nagore; Abedul Moreno, David; Oruna Otalora, Angel; GALDOS, Lander (Elsevier Ltd., 2020)Dynamic testing of materials is necessary to model high-speed forming processes (i.e. hammer forging, blanking) and crash/impact behavior of structures, among others. The most common machines to perform medium to high-speed ... -
Numerical analysis of AISI 321 alloy material parameters on rubber pad diaphragm forming
Sanchez Barros, Pablo; Otegi, Nagore; GALDOS, Lander; Sáenz de Argandoña, Eneko (IOP Publishing, 2022)Rubber pad diaphragm forming is a technology that uses a rigid die in conjunction with a flexible polyurethane tool and fluid pressure action in order to shape metal sheets. In this process, the action of the fluid forms ... -
Numerical study of advanced friction modelling for sheet metal forming: influence of the die local roughness
Zabala, Alaitz; Sáenz de Argandoña, Eneko; Llavori, Inigo; Otegi, Nagore; Mendiguren, Joseba (Elsevier Ltd., 2022)Numerical simulation of sheet metal forming processes has become indispensable in the last decades. Although the complexity of the frictional behaviour is identified as a key factor for the prediction accuracy, the industry ... -
On the accurate characterization of the drawbead up-lift forces
Gil, Imanol; GALDOS, Lander; Otegi, Nagore; Mendiguren, Joseba; Sáenz de Argandoña, Eneko (IOP Publishing Ltd., 2018)The competitiveness of the automotive sector has led to a high demand of accuracy and reduction in lead-time of the deep drawing tool making process. In that regard, the numerical simulation of the deep drawing process has ... -
Optimization of superplastic forming production of Al-5083-SPF parts via finite element analysis
Otegi, Nagore (Mondragon Unibertsitatea. Goi Eskola Politeknikoa, 2012)For the aerospace industry, improving the fuel efficiency and emissions profile of aircraft is a major area of focus. Thereby, research is centred in the study and development of lightweight materials and in fabrication ... -
Post-forming, electro-plastic effect internal stress reduction in AA5754 aluminium alloy
Otegi, Nagore; Barrenetxea, Manex; Aizpuru, Iosu; Mendiguren, Joseba (Elsevier, 2022)Aluminium alloys are one of the most efficient materials for weight reduction in the car industry. However, the favourable performance of alloys conflicts with the difficulties of transforming these materials through plastic ... -
Simulation of Cold Forging Processes Using a Mixed Isotropic-Kinematik Hardening Model
GALDOS, Lander; Agirre, Julen; Otegi, Nagore; Mendiguren, Joseba; Sáenz de Argandoña, Eneko (Springer, 2021)Cold forging is a manufacturing process where a bar stock is inserted into a die and squeezed with a second closed die. It is one of the most widely used chipless forming processes, often requiring no machining or additional ... -
Substitutive Press-Bolster and Press-Ram Models for the Virtual Estimation of Stamping-Tool Cambering
Abbasi, Farshad; Trinidad Naranjo, Javier; Otegi, Nagore; Sáenz de Argandoña, Eneko; GALDOS, Lander (MDPI, 2021)Today’s stamping simulations are realized by ignoring the elastic deformation of the press and tooling system through the assumption of a rigid behavior and a perfect press stroke. However, in reality, the press and tool ...
