Extraction of Three-Dimensional Parameters for Weld Pool Surface in Pulsed GTAW With Wire Filler-Reference-Cited by-同舟云学术

Extraction of Three-Dimensional Parameters for Weld Pool Surface in Pulsed GTAW With Wire Filler

Published:2003-07-23 Issue:3 Volume:125 Page:493-503
ISSN:1087-1357
Container-title:Journal of Manufacturing Science and Engineering
language:en
Short-container-title:

Author:

Zhao D. B.¹,Yi J. Q.¹,Chen S. B.²,Wu L.³,Chen Q.⁴

Affiliation:

1. Laboratory of Complex Systems and Intelligence Science, Institute of Automation, Chinese Academy of Sciences, Beijing 100080, P. R. China

2. Institute of Welding Technology, Shanghai Jiao Tong University, Shanghai, 200030, P. R. China

3. National Key Laboratory of Advanced Welding Production Technology, Harbin Institute of Technology, Harbin 150001, P.R. China

4. Department of Mechanical Engineering, Tsinghua University, Beijing 100084, P. R. China

Abstract

By viewing the topside of a weld pool, a skilled operator can estimate the weld joint penetration. The weld pool shape or the solidified bead shape is crucial for weld quality. Automatic control of pulsed GTAW with wire filler is achieved by recording the image of the weld pool with an optical sensing method and then calculating shape parameters with an image processing algorithm. Three-dimensional shape parameters of the weld pool were determined that uniquely and accurately describe various weld pool shapes. Two-dimensional shape parameters were extracted from a two-dimensional image processing algorithm. Finally, a shape from shading (SFS) algorithm on a single image was used to recover the surface height from a single weld pool image. The extracted three-dimensional parameters for the weld pool surface were verified and used for double-sided shape control.

Publisher

ASME International

Subject

Industrial and Manufacturing Engineering,Computer Science Applications,Mechanical Engineering,Control and Systems Engineering

Link

http://asmedigitalcollection.asme.org/manufacturingscience/article-pdf/125/3/493/5933591/493_1.pdf

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