Weld Penetration Control with Radiographic Feedback on Weld Pool Depression

  • A. C. Guu
  • S. I. Rokhlin
Part of the Review of Progress in Quantitative Nondestructive Evaluation book series


Recently [1,2], a method for remote arc weld process control using real-time radiography as a vision system was described. In this work information on weld quality extracted from real-time radiographic images was used in feedback to change welding conditions to maintain weld quality. Principal attention was given to automatic control of weld penetration [2]. The radiographic image was analyzed at some distance behind the welding pool where the weld became solidified. An early detection, from the image, of depth of weld penetration was performed and based on this information the welding current was adjusted automatically to obtain complete penetration. The time (and space) delay in extracting information on weld penetration leads to the appearance of small areas of weld with lack of penetration.


Welding Pool Welding Speed Molten Pool Weld Quality Weld Penetration 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.


Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.


  1. 1.
    S. I. Rokhlin, “In-Process Radiographic Control of Arc Welding”, Materials Evaluation, 47, 225–232 (1989).Google Scholar
  2. 2.
    S. I. Rokhlin, K. Cho and A. C. Guu, “Closed-Loop Control of Weld Penetration Using Real-Time Radiography”, Materials Evaluation, 47, 350–369 (1989).Google Scholar

Copyright information

© Springer Science+Business Media New York 1990

Authors and Affiliations

  • A. C. Guu
    • 1
  • S. I. Rokhlin
    • 1
  1. 1.Department of Welding EngineeringThe Ohio State UniversityColumbusUSA

Personalised recommendations