Process for producing rollformed sections
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United States of America Patent
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-
Nov 9, 1999
Issued Date -
N/A
app pub date -
Dec 23, 1996
filing date -
Jan 8, 1993
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A cold forming process includes mechanically joining two strips of metal. The process entails two roll passes. The first pass lances and forms short locking areas through both strips of metal. The second pass compresses and flairs the metal at these areas to complete a mechanical interlock. This method can provide a row of closely spaced fastenings at high speed. It is applicable in improving the torsion strength of existing tee grid products. It is also applicable in creating more efficient rollformed shapes by providing a means to use more than one metal strip.
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