| 摘要 |
<p>The present invention relates to a method for in process weld seam testing of a weld seam joining two metallic parts, said method comprising the steps of: providing two laser beams, directing the first laser beam on a first predetermined position on the first metallic part and directing the second laser beam on a second predetermined position on the second metallic part, and detecting the reflected light of the laser beams along the weld seam. The invention further relates to an apparaturs for weld seam testing of a laser weld seam joining a metallic container or tube and a metallic cap, said apparatus comprising: two laser beam emitting devices or a scanning laser beam emitting device, a means for positioning of the container or tube and the cap in a position such that the first beam is directed on a first predetermined positon on the container or tube or that the scanning laser beams scans the first and second predetermined position, and optionally stopping means, a means for moving the container or tube and cap so as to allow for scanning of the laser beam(s) along weld seam, and a detector for detecting the reflected light of the laser beam(s) along the weld seam.</p> |
