E - Fixed Constructions – 04 – C
Patent
E - Fixed Constructions
04
C
80/21, 153/35, 1
E04C 2/32 (2006.01) B21B 1/00 (2006.01) B21B 15/00 (2006.01) B21D 5/08 (2006.01) E04C 2/08 (2006.01) E04C 3/32 (2006.01)
Patent
CA 1316766
COLD ROLL-FORMED STRUCTURES AND METHOD AND APPARATUS FOR PRODUCING SAME ABSTRACT OF THE DISCLOSURE A cold-forming method is disclosed for thinning localized, longitudinally extending portions of sheet metal by lateral shear deformation without any substan- tial longitudinal deformation. With such method, it is possible to produce elongated members which are thinned in zones of low stress and are thicker in zones of higher stress so as to provide high metal use efficiency. The method is performed by an apparatus including a rotating mandrel providing opposed conical surfaces and pressure rolls operable to apply forces substantially perpen- dicular to the axis of rotation of the mandrel to cause a portion of the sheet metal to yield in shear to reduce the thickness of longitudinally extending portions of the sheet metal. The forces are applied in a plane normal to the length of the strip in order to avoid longitudinal elongation.
531799
Alvarez Dennis A.
Bosl George F.
Hocevar Joseph A.
Kelly Patrick M.
Sauer Gale E.
Borden Ladner Gervais Llp
Donn Incorporated
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