Process and apparatus for spot welding with a laser beam
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United States of America Patent
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Nov 6, 2012
Grant Date -
Nov 18, 2004
app pub date -
May 7, 2004
filing date -
May 13, 2003
priority date (Note) -
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Abstract
The invention relates to a laser spot welding process for executing a spot weld in two successive steps, namely a first step of preparing the surface state of the material to be welded and a second step of welding as such. The luminous energy (BR) reflected by the weld region of the material is measured in real time during the first step and then processed by a controller circuit (37) connected to a control circuit (30) of the laser source (31). In this way, the characteristics (LM) of the laser beam are adjusted in real time as a function of the measurements effected to allow effective control of the quality of the weld obtained, and in particular of its dimensions.
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