Laser brazing process
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United States of America Patent
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May 21, 2024
Grant Date -
Nov 12, 2020
app pub date -
Jul 23, 2020
filing date -
Feb 5, 2018
priority date (Note) -
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Abstract
A process for joining first and second metal workpieces by laser brazing for forming a vehicle structure includes providing the workpieces in contacting relationship so as to form an elongated contact region, wherein at least one of the workpieces is made of hot-dip galvanized steel material, supplying a laser beam having a beam parameter product lower than 10 mm·mrad from a laser source, guiding the laser beam through a laser focus head having a total optical magnification in the range of 1:0.5-1:1.5, directing the laser beam along the elongated contact region, wherein a beam spot formed where the laser beam hits the contact region has a size in the range of 2-6 mm, and supplying a consumable wire of filler material to the beam spot to melt the consumable wire and braze the workpieces together, wherein the consumable wire comprises at least 95% copper.
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