The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 15, 2006
Filed:
Mar. 01, 2004
Wolfgang Becker, Ulm, DE;
Markus Beck, Oberelchingen, DE;
Klaus Goth, Sindelfingen, DE;
Mike Paelmer, Weil der Stadt, DE;
Claus-dieter Reiniger, Remshalden, DE;
Daniel Zauner, Ballendorf, DE;
Wolfgang Becker, Ulm, DE;
Markus Beck, Oberelchingen, DE;
Klaus Goth, Sindelfingen, DE;
Mike Paelmer, Weil der Stadt, DE;
Claus-Dieter Reiniger, Remshalden, DE;
Daniel Zauner, Ballendorf, DE;
DaimlerChrysler AG, , DE;
Abstract
During laser beam welding a so-called end crater forms at the end of the weld seam. The end crater is formed by the volume shrinkage of the solidifying melt after the laser beam reaches the seam end and is switched off or repositioned. The end crater acts as a geometric notch and decreases the mechanical characteristics, in particular the operational stability, of the weld seam so that holes or tears in the area of the end crater can occur. The task of the present invention is thus comprised of providing a process for reducing end crater formation. The task is solved in that towards the seam end the focus of the laser beam is distanced from the surface to be welded and/or a transverse movement of the beam occurs.