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Title: Dynamic Reflection Behaviors of Weld Pool Surface in Pulsed GTAW

Abstract

Here in this paper, a method was studied to determine the weld pool penetration based on the dynamic behaviors of the weld pool surface. To this end, relative works were per- formed to observe, measure, and analyze the development of a weld pool through the imaged laser matrix dots and correlate the changes in the imaged dots to the weld pool penetration. It was found that during partial joint penetration, the imaged dot matrix on the weld pool was clear and bright, but became fuzzier and dimmer when critical/complete joint penetration was reached. Results showed this was related to the root damping force in partial penetration, which obstructed the oscillation of the weld pool and made the surface relatively still for imaging. When critical/complete joint penetration was reached, the root damping force was diminished, and thus the pool surface oscillation was stronger, which led to dimmer and fuzzier images. By quantifying the relation between the image grayness variations with the penetration stages, a method was found for the automated control of the welding process.

Authors:
 [1]; ORCiD logo [2];  [3]; ORCiD logo [2];  [1]
  1. Univ. of Kentucky, Lexington, KY (United States). Inst. for Sustainable Manufacturing and Dept. of Electrical and Computer Engineering
  2. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Materials Joining and Processing Division
  3. Univ. of Kentucky, Lexington, KY (United States). Inst. for Sustainable Manufacturing and Dept. of Electrical and Computer Engineering; Shanghai Jiao Tong Univ., Shanghai (China). School of Materials Sciences and Engineering Inst. for Laser Processing
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1471896
Grant/Contract Number:  
AC05-00OR22725
Resource Type:
Accepted Manuscript
Journal Name:
Welding Journal
Additional Journal Information:
Journal Volume: 97; Journal ID: ISSN 0043-2296
Publisher:
American Welding Society
Country of Publication:
United States
Language:
English
Subject:
42 ENGINEERING; 97 MATHEMATICS AND COMPUTING; Sensor; Process Control/Monitoring; Robotics; Automation; GTAW

Citation Formats

Chen, Jinsong, Chen, Jian, Zhang, Ke, Feng, Zhili, and Zhang, Yu-Ming. Dynamic Reflection Behaviors of Weld Pool Surface in Pulsed GTAW. United States: N. p., 2018. Web. doi:10.29391/2018.97.017.
Chen, Jinsong, Chen, Jian, Zhang, Ke, Feng, Zhili, & Zhang, Yu-Ming. Dynamic Reflection Behaviors of Weld Pool Surface in Pulsed GTAW. United States. doi:10.29391/2018.97.017.
Chen, Jinsong, Chen, Jian, Zhang, Ke, Feng, Zhili, and Zhang, Yu-Ming. Fri . "Dynamic Reflection Behaviors of Weld Pool Surface in Pulsed GTAW". United States. doi:10.29391/2018.97.017. https://www.osti.gov/servlets/purl/1471896.
@article{osti_1471896,
title = {Dynamic Reflection Behaviors of Weld Pool Surface in Pulsed GTAW},
author = {Chen, Jinsong and Chen, Jian and Zhang, Ke and Feng, Zhili and Zhang, Yu-Ming},
abstractNote = {Here in this paper, a method was studied to determine the weld pool penetration based on the dynamic behaviors of the weld pool surface. To this end, relative works were per- formed to observe, measure, and analyze the development of a weld pool through the imaged laser matrix dots and correlate the changes in the imaged dots to the weld pool penetration. It was found that during partial joint penetration, the imaged dot matrix on the weld pool was clear and bright, but became fuzzier and dimmer when critical/complete joint penetration was reached. Results showed this was related to the root damping force in partial penetration, which obstructed the oscillation of the weld pool and made the surface relatively still for imaging. When critical/complete joint penetration was reached, the root damping force was diminished, and thus the pool surface oscillation was stronger, which led to dimmer and fuzzier images. By quantifying the relation between the image grayness variations with the penetration stages, a method was found for the automated control of the welding process.},
doi = {10.29391/2018.97.017},
journal = {Welding Journal},
number = ,
volume = 97,
place = {United States},
year = {2018},
month = {6}
}

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