Structural member and method of making by cold rolling followed by induction or resistance welding
AssigneeTube Technology Pty. Ltd.
InventorLeslie D. Goleby
Life of this patent
Estimating the term…
Abstract
A multiple component structural member is made by cold roll forming two continuous strips of metal on opposite sides of a third continuous strip of metal. The cold rolling process creates two hollow flange elements with a continuous aperture in which the edges of the third continuous strip of metal is partly extended, followed by resistance or induction welding to create the multiple component structural member.
Claims18
A method for the continuous formation of a structural member having at least one web element and at least one hollow flange element extending longitudinally of an edge of said web element, said method including the steps of:
- cold roll forming a first continuous strip of metal to form said at least one hollow flange element, the free edges of which are spaced to form a continuous aperture therein;
- guiding a second continuous strip of metal between said free edges and at least partially into said aperture;
- and
- continuously fusing said free edges to opposed faces of said web element by high frequency electrical induction or resistance welding.
A method for the continuous formation of a structural member comprising at least one web element and at least one hollow flange element extending longitudinally of an edge of said web element, said method including the steps of:
- continuously fusing a first edge of a first continuous strip of metal to the surface of a second continuous strip of metal intermediate the edges of said second continuous strip;
- and
- subsequently cold roll forming said second continuous strip to form a closed hollow flange element extending longitudinally of an edge of said first continuous strip, said first continuous strip forming said web element.
Dependencies are inferred from the claim text.