) Shot sleeve before transition |
) Simplified velocity BC before transition |
) Shot sleeve after transition |
) Simplified velocity BC after transition |
EKK, Inc. Newsletter - September/October 2005 If you missed the recent 2005 Computer Modeling Fair hosted by NADCA, you missed out on an impressive display of the capabilities of our CAPCAST software package. In preparation for the show, we ran a series of analyses on a die casting process, including thermal/solidification, fluid flow incorporating shot sleeve and trapped air, and thermal distortion. With results from these analyses, we put together a comprehensive presentation for the show. If you would like to see our presentation, we can send you a copy. We also invite you to let us walk you through the presentation through a live web conference. Please send requests to Sherry Nowak at EKK.
In the last newsletter, we introduced the velocity profile tool in our HPDC WRAFTS GUI. This tool converts the actual shot profile to one that can be used when modeling the metal velocity using a simplified boundary condition applied to the biscuit. Shown below is a comparison of the predicted location of the fluid front before and after the slow-fast transition from a full shot sleeve analysis (on the left) and an analysis that uses the simplified velocity boundary condition (on the right). You will see that using the shot profile from the velocity profile tool in the WRAFTS GUI with the simplified velocity boundary condition does a very good job of approximating the actual shot profile. Note that you can click on any of the four images if you'd like to see a larger view.
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Shot sleeve before transition |
Simplified velocity BC before transition |
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Shot sleeve after transition |
Simplified velocity BC after transition |
Our software can be used to predict tool steel failure after many thermal cycles. This ability is part of our normal stress module and can utilize the same mesh from the other simulations. It will show you the highest stress areas and the amount of strain that is occurring. Our users have had good correlation between these stress results and actual die failure.
Previous newsletters
May/June/July/August 2005
March/April 2005
January/February 2005