Process for manufacturing ribbed tubes and ribbed tubes thus manufactured
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United States of America Patent
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Apr 25, 2000
Issued Date -
N/A
app pub date -
Jul 15, 1998
filing date -
Jul 17, 1996
priority date (Note) -
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Abstract
The invention concerns a process for manufacturing ribbed tubes, wherein a stainless steel tube is provided with ribs by helicoidally winding a copper strip around it, and a ribbed tube thus manufactured. In joining the tube and rib, the unmelted copper strip is set on the tube surface edgewise into a melted area produced by a laser beam exclusively on the tube surface, thereby bonding the strip onto the tube by the solidification of the melted tube material. In this manner ribbed tubes can be provided, featuring an internal tube made of corrosion-resistant stainless steel and a helicoidal rib made of copper for increasing the heat exchange surface of the tube, which is distinguished by high thermal conductivity.
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