Computer aided procedure for selecting technological parameters in the drawing process
The ability to predict the performance of a particular manufacturing process is not always easy. Many factors are usually involved, and their influence can be critical in some cases. In drawing process there are several parameters that are related to the necessary energy to perform the process. However, the knowledge about the influence of these parameters is already scarce. Although there are several analysis techniques, the Finite Element Method has become an indispensable tool for analysing metal forming problems. In this study the drawing process has been simulated for different values of reduction, friction, die semiangle and back tension. The results show the influence of these parameters on the energy employed to develop the process.
Can I know what is the most complex profile in Upper Bound Theorem (UBT) application lately?
As you suppose, the more complex the finite element model, the more difficult is to get the convergence. In this sense, if you try to include a more realistic material behaviour model, or a more complex geometry of the parts you could find convergence problems.
Training and experience can help us to solve these drawbacks. However, the capacity of calculation is unquestionable, and also the variety of aspects of a process (or whatever the system) that you can study with this numerical technique.
I agree with you that a sensitivity analysis would be very interesting. In fact, this will be a work to develop from now on.
Thank you for your interest,
Ana
Sorry, but I do not know which is the most complex profile in UBT application. What I wanted to say is that, for example, it is possible to analyze a seamless ring rolling process by UBT, where more complex geometries than in drawing process are involved.
Thank you for your comment,
Ana Mª Camacho
Very interesting and useful research. In the paper it is clear that the FEM approach outperforms the traditional analytical methods. Nevertheless, have you found any drawback with the FEM when analysing the influences of the parameters in the drawing mean stress?
Also, as mentioned in the paper, a sensitivity analysis of the parameters would be very interesting.
Thank you,
Gonzalo.