METHOD FOR CONNECTING TUBES OF A TUBE BUNDLE HEAT EXCHANGER TO A TUBESHEET OF THE TUBE BUNDLE HEAT EXCHANGER
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United States of America Patent
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Jan 17, 2019
app pub date -
Jan 18, 2017
filing date -
Jan 18, 2017
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Abstract
The present invention relates to a method for connecting tubes (125) of a tube bundle heat exchanger to a tube plate (130) of the tube bundle heat exchanger, wherein the tubes (125) are cohesively connected to the tube plate (130) by laser welding, during the course of which a laser beam (211) is generated and is focused on a location to be welded in a connecting region (250) between tube (125) and tube plate (130), wherein the laser beam (211) is moved so as to perform a first movement over the connecting region (250) and a second movement which is superposed on the first movement and which differs from the first movement, and wherein, by means of the second movement, melt bath dynamics are influenced in targeted fashion and/or a vapour capillary that forms is modified in targeted fashion.
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