Location

Brunswick, ME

Start Date

1-1-1990 12:00 AM

Description

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.

Book Title

Review of Progress in Quantitative Nondestructive Evaluation

Volume

9B

Chapter

Chapter 9: Manufacturing and Process Control

Pages

1973-1980

Language

en

File Format

application/pdf

Share

COinS
 
Jan 1st, 12:00 AM

Weld Penetration Control with Radiographic Feedback on Weld Pool Depression

Brunswick, ME

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.