In July of 2007, Keith Nagel and Rob Riehbrandt of Miller Tool and Die received a United States Patent ( 7,237,423 B1 ) . The patent is for a traveling step ledge that applies side wall stretch to a deep drawn part. Stretching the side walls puts a "set" to the drawn shell. Once trimmed the part will have minimal springing.
If this is an application that fits your needs, please contact us for a review of your component.
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