Patent ID: 8561451
Filing Date: 2013-10-22
Classification: B21C,B21D,B21H,B23P,F28D,F28F,Y10T

Abstract:
1. A method of producing a flat tube, comprising: forming turbulators in a strip of material, each turbulator spaced from adjacent turbulators; passing the strip of material through rollers in a longitudinal direction of the strip; forming corrugations in the portion of the strip of material by passing the strip of material through the rollers, the corrugations including a plurality of alternating peaks and troughs, each of the plurality of alternating peaks and troughs extending in the longitudinal direction, wherein the turbulators are positioned between adjacent peaks and troughs of the plurality of alternating peaks and troughs; forming wall parts of the flat tube; positioning the portion of the strip of material between the wall parts of the flat tube; closing the wall parts of the flat tube around the strip of material; and cutting the strip in the transverse direction after the turbulators and the corrugations are formed.