Selected articles from July/August 2009 issue published on TheFabricator.com:
Usually the first place stampers look to reduce cost is the labor burden per part, which leads to the inevitable pursuit of producing parts faster. The speed capability of a stamping die is determined by how fast the part physically can be produced and at what speed the tooling fails. The strength of the carrier, how high the part must be lifted, and the mechanical limits of the springs and side action cams (mandrels) limit how fast the tool can run.
Warm forming, or forming material heated in the 200-degree-C to 500-degree-C range, offers dramatic improvement in forming properties over room temperature forming for many aluminum or magnesium alloys—without exotic heat sources or tooling.
It seems like every time there is a problem making a good part, the steel is blamed. Often the root problem is the process used to cut and form the steel — the combination of the die, the press, and the lubricant.
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