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Method utilizing power adjusted sweep device

  • US 7,530,249 B2
  • Filed: 10/26/2007
  • Issued: 05/12/2009
  • Est. Priority Date: 06/13/2005
  • Status: Active Grant
First Claim
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1. A method comprising steps of:

  • providing a sheet of high strength material having a tensile strength of at least 80 KSI;

    providing a roll-forming apparatus capable of forming the sheet at speeds of at least about 900 feet per hour, the roll-forming apparatus including an adjustable sweep station, an actuator, and a controller operably connected thereto for automatically rapidly adjusting the sweep station to generate different sweep radii; and

    roll-forming the sheet to form a continuous beam having a continuous cross section and, simultaneous with and near an end of the roll-forming, sequentially and repeatedly imparting different sweeps while running the roll-forming at a line speed of at least about 900 feet per hour, the step of roll-forming the continuous beam and imparting different sweeps including forming at least one first section with a radius R1 and at least one second section with a radius R2 different from the first radius R1, and including a step of cutting off the continuous beam into beam segments at a location in a center of the one section with radius R1 with each of the beam segments having the segment with radius R2 centrally located and a portion of the segment with radius R1 located at each end.

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