Saturday, October 19, 2013
Die forging process (open and closed die)
Forging is dirty. There's no doubt about it, but forging is just so amazing to watch, especially when the scale peels off of the piece as pressure is increased.
This video goes through the advantages for forging (reduce crosssection, improve microstructure, provide directional grain flow, and eliminate porosity of castings), and two types of forging (open die, impression or closed die forging). We get to see multiple steps in the process as well as eventual removal of the flash.
Great intro video, folks. Thanks to Rebecca for passing it along.
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Open die surfaces cools faster than the metal towards the center of the part. Also cooler die surfaces is more resistant to deformation and will expand causing a barreling effect.
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