Reduction of Stages in Multi-Stage Metal Forming Process Based on Numerical Optimization in Conjunction with FE Simulation

2007 ◽  
pp. 767-772
Author(s):  
Ryutaro Hino ◽  
Akihiko Sasaki ◽  
Fusahito Yoshida ◽  
Vassili V. Toropov
Keyword(s):  
Metal Forming ◽  
Numerical Optimization ◽  
Fe Simulation ◽  
Forming Process ◽  
Multi Stage ◽  
Metal Forming Process

Reduction of Stages in Multi-Stage Metal Forming Process Based on Numerical Optimization in Conjunction with FE Simulation

2007 ◽  
Vol 340-341 ◽  
pp. 767-772
Author(s):  
Ryutaro Hino ◽  
Akihiko Sasaki ◽  
Fusahito Yoshida ◽  
Vassili V. Toropov
Keyword(s):  
Design Optimization ◽  
Process Design ◽  
Metal Forming ◽  
Numerical Optimization ◽  
Fe Simulation ◽  
Design Technique ◽  
Forming Process ◽  
Multi Stage ◽  
Metal Forming Process ◽  
Stage Process

In this study, a new simulation-based design technique for multi-stage metal forming process is developed with special emphasis on reduction of stages in the process. The developed design technique is an iterative design optimization, which is based on response-surface-based numerical optimization and finite element analysis of the process. The design procedure starts with the initial rough process design. To eliminate one stage in the multi-stage process, the new optimum process design is determined based on the former process design by using numerical optimization in conjunction with FE simulation. This design optimization step is repeated, reducing the stages one by one, until the possible minimum number of stages is reached. The developed design technique is applied to stage reduction of a 3-stage axisymmetric forging process of aluminum billet. We can confirm that a new 2-stage process design is determined successfully and the developed design optimization technique is effective to reduce stages in multi-stage forming process.

NUMERICAL OPTIMIZATION OF SHEET METAL FORMING PROCESS USING NEW FRACTURE CRITERION

2008 ◽  
Vol 22 (31n32) ◽  
pp. 5692-5698 ◽  
Author(s):  
A. HIRAHARA ◽  
R. HINO ◽  
F. YOSHIDA ◽  
V. V. TOROPOV
Keyword(s):  
Sheet Metal ◽  
Sheet Metal Forming ◽  
Metal Forming ◽  
Numerical Optimization ◽  
Fracture Criterion ◽  
Optimization Strategy ◽  
Forming Process ◽  
Optimization System ◽  
Blank Design ◽  
Metal Forming Process

A numerical optimization system for sheet metal forming process has been developed based on a combination of response-surface-based optimization strategy with finite element simulation. The most important feature of the optimization system is introduction of a new fracture criterion to predict fracture limit under non-proportional deformation. In addition, a sheet-edge fracture criterion is also introduced to predict fracture limit under stretch-flanging deformation. The numerical optimization system is developed using the fracture criteria as accurate fracture constraints to avoid sheet breakage. The developed optimization system is applied to the optimum blank design for a square-cup deep drawing process of perforated blank. The optimum blank design, which minimizes the amount of material and avoids the sheet fracture, is obtained successfully. The effect of definition of fracture constraints on optimization calculation is also discussed.

scholarly journals Multiscale friction model for hot sheet metal forming

Friction ◽  
2021 ◽  
Author(s):  
Jenny Venema ◽  
Javad Hazrati ◽  
Eisso Atzema ◽  
David Matthews ◽  
Ton van den Boogaard
Keyword(s):  
Sheet Metal ◽  
Sheet Metal Forming ◽  
Metal Forming ◽  
Fe Simulation ◽  
Normal Load ◽  
Hot Stamping ◽  
Friction Model ◽  
Forming Process ◽  
Surface Evolution ◽  
Metal Forming Process

AbstractThe accurate description of friction is critical in the finite element (FE) simulation of the sheet metal forming process. Usually, friction is oversimplified through the use of a constant Coulomb friction coefficient. In this study, the application of an existing multiscale friction model is extended to the hot stamping process. The model accounts for the effects of tool and sheet metal surface topography as well as the evolution of contact pressure, temperature, and bulk strain during hot stamping. Normal load flattening and strip drawing experiments are performed to calibrate the model. The results show that the model can relatively well predict friction in strip draw experiments when the tool surface evolution due to wear is incorporated. Finally, the application of the formulated multiscale friction model was demonstrated in the FE simulation of a hot-stamped part.

scholarly journals Laser Welding of High-strength Aluminium Alloys for the Sheet Metal Forming Process

Procedia CIRP ◽  
2014 ◽  
Vol 18 ◽  
pp. 203-208 ◽  
Author(s):  
J. Enz ◽  
S. Riekehr ◽  
V. Ventzke ◽  
N. Sotirov ◽  
N. Kashaev
Keyword(s):  
Laser Welding ◽  
Sheet Metal ◽  
Sheet Metal Forming ◽  
Metal Forming ◽  
Aluminium Alloys ◽  
High Strength ◽  
Forming Process ◽  
Metal Forming Process
Sign in / Sign up

Export Citation Format

Share Document