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Member Webinar: Exit Temperatures
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When: Wednesday, November 20, 2019
1:30 PM
Where: United States
Contact: Lisse Jurcenko

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AECMeets Member Webinar

Exit Temperatures
Presented by Richard Dickson, Hydro Metals; Paul Robbins, Castool Tooling Systems
Wednesday, November 20, 2019
2:30-3:30 PM EST

Temperature is the key factor that determines the surface quality of the extrusion, but does a pyrometer tells us enough about the exit temperature of the extrusion?

Experimental measurements of temperature at the die bearing and simulations show that the maximum temperature that the extrusion surface is experiencing is much higher than the pyrometer readings. The reason is that the sever shear and friction at the surface of the extrusion causes the immediate temperature jump at the surface of extrusion as it is entering the die opening and passing through the bearing. Due to high conductivity of aluminum, this localized heat would dissipate instantly and the temperature would equilibrate across the section before extrusion reaches the die exit where the pyrometer reads the temperature. So that understanding the actual temperature that the extrusion surface is experiencing needs different tools and techniques.

Here we are going to talk about tools available for estimating the actual surface temperature at die bearing and it’s sensitivity to process and tooling parameters such as ram speed, container temperature, die design and conductivity.

The art is to optimize these parameters so that the surface exit temperature is below the critical value while getting the most benefit from press and tooling system capabilities to achieve an optimum productivity.
Presenters are Richard Dickson of Hydro Metals, and Paul Robbins of Castool Tooling Systems.


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