Patent Number: 6,166,348

Title: Finned tube

Abstract: The invention relates to a finned tube (1), a process for its manufacture and a device for performing the process. The process involves at least one endless strip (4), forming the fins, being wrapped around a rotating tube body (2) in roughly helical fashion and the narrow side of the strip (4) facing the tube body (2) being joined to the tube surface by means of a welding device (7). In order to be able to work with little financial outlay and in an energy-saving manner, and to create a product where the entire width of the base of the fin is optimally joined to the tube surface and the joint area displays good thermal conduction, the working end of the welding device (7) is inserted into the free wedge-shaped space between the tube surface (3) and the strip (4) where, with the aid of the welding device (7) a welding bead (11) is applied, running exactly in the area of the joint between the strip (4) and the tube surface (3), to the tube surface (3) using a filler, before the narrow edge of the strip (4) to be joined makes contact. The narrow edge of the strip (4) to be joined is subsequently pressed into the welding bead (11) while it is still liquid.

Inventors: Brundermann; Georg (49832 Thuine, DE)

Assignee: Brundermann; Georg

International Classification: B21C 37/26 (20060101); B21C 37/15 (20060101); B23K 9/02 (20060101); B23K 9/032 (20060101); B23K 009/032 ()

Expiration Date: 12/26/2017