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Proceedings Paper

Improvement of process security in sensor-guided welding by the use of computer-based devices
Author(s): Alexandra Pischetsrieder; Hans-Simon Meier
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Paper Abstract

High reliability and fault tolerance of workcells for laser welding often require the use of adequate seam tracking sensor systems. Moreover flawless path processing demands vibration-free path tracking. This is not always guaranteed since the system sensor-robot is prone to vibrations under unfavorable circumstances. To determine the reasons for the vibrations critical contours are welded while the path of the robot is recorded simultaneously. From these results possibilities to compensate the vibrations are derived. Furthermore the detection of a faulty seam position is desired. This includes missing or wrongly positioned parts as well as a gradual change in the seam positioning, due to wear of tools or clamping devices, for example. By the implementation of a computer based system to compare the actual path to a reference path deviations in the position of the seam as well as the current gap height can be detected, amounted, visualized and recorded. The data may be used to detect a gradual change of the position of the seam, to avoid collisions or to recognize and single out faulty parts. By combining both means a possibility to improve the process security in laser material processing was developed.

Paper Details

Date Published: 18 August 1997
PDF: 8 pages
Proc. SPIE 3097, Lasers in Material Processing, (18 August 1997); doi: 10.1117/12.281069
Show Author Affiliations
Alexandra Pischetsrieder, Technical Univ. of Munich (Germany)
Hans-Simon Meier, Technical Univ. of Munich (Germany)

Published in SPIE Proceedings Vol. 3097:
Lasers in Material Processing
Leo H. J. F. Beckmann, Editor(s)

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