Quantitative Evaluation of Porthole Dies Design Practices by means of FE Analyses

Nowadays, die-makers are called to produce higher productivity tools without compromising knock-off rates. One of the main aspects to be considered while designing a porthole extrusion die is the geometry of legs and ports in the mandrel plate. In fact, the mandrel geometry modifies locally the strain (ε) and the strain rate (έ) levels thus influencing the required ram force for a given ram speed, the stress on the legs (and consequently their performance), the pressure in the welding chamber and the temperatures.

In order to quantitatively evaluate the effects of the best practices adopted in the design of porthole extrusion dies, a new methodology and its preliminary results are presented and discussed in this contribution.

The Author

Dr. Tommaso Pinter
Business Development
Alumat & Almax Mori