The chassis frame parts built by pressing and welding have unavoidable large gaps that makes the joining process relatively difficult to perform a sound welded joint. A one-pass weld seam tracking arc welding system that utilizes a robot and laser sensor is developed to perform high quality and high speed joining for thin plate joints in automobile chassis. The laser sensor installed on the welding torch detects the welding position, gap size and relative offset of the joint ahead of welding point. The controller incorporates the feedback data from laser sensor controller and changes the welding position and condition based on the welding condition database already loaded in the controller. Welding speed and amount of metal deposition have also been improved by applying a newly introduced method based on melting the part of the edge of base metal. Moreover, using the tracking function, one is able to track the three-dimensional weld line of the thin plate at higher speed and accuracy. Consequently, this paper outlines the tracking system, adaptive control of welding process, the principle of high speed joining with increased metal deposition, examples in automotive manufacturing industry and an alternative future application field of robots.
Real-time seam tracking high speed and high quality laser sensor guided arc welding system for thin metal joints of automobile chassis
Lasersensorgeführtes Hochgeschwindigkeits- und Hochqualitäts-Echtzeitnahtverfolgungs-Lichtbogenschweißsystem für dünne Metallverbindungen von Automobilfahrgestellen
1999
11 Seiten, 5 Bilder, 3 Tabellen, 7 Quellen
Conference paper
English
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