DETERMINING KEYHOLE STABILITY FOR PLASMA ARC WELDING PROCESS CONTROL

Shaobin Zhang; Yu Ming Zhang

doi:10.1115/IMECE1999-0663

DETERMINING KEYHOLE STABILITY FOR PLASMA ARC WELDING PROCESS CONTROL

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

Abstract

Stability of the keyhole plays a fundamental role in producing quality welds in keyhole plasma arc welding. Currently, keyhole size is assumed to be a measurement of its stability. To verify this idea, keyhole and weld pool were simultaneously imaged from the opposite side of the welding torch. Experimental results revealed that the width of the keyhole was not correlative with the stability of the keyhole: as long as the keyhole mode was maintained, the width remained constant despite the changes in the welding current and speed. However, it can be used to estimate the lower limit of the pool width for preventing keyhole collapse. Also, the upper limit of the pool width for preventing bum-through is approximately fixed for given applications. Hence, in this sWdy, pool width, its upper limit, and keyhole width were used to determine the margins of the process from collapse and bum-through. To measure the state of the stability of the keyhole process, the stability distance and stability factor were proposed. Based on the imaging system used, the state of the stability can be monitored in real-time.

Original language	English
Title of host publication	Manufacturing Science and Engineering
Pages	123-129
Number of pages	7
ISBN (Electronic)	9780791816462
DOIs	https://doi.org/10.1115/IMECE1999-0663
State	Published - 1999
Event	ASME 1999 International Mechanical Engineering Congress and Exposition, IMECE 1999 - Nashville, United States Duration: Nov 14 1999 → Nov 19 1999

Publication series

Name	ASME International Mechanical Engineering Congress and Exposition, Proceedings (IMECE)
Volume	1999-U

Conference

Conference	ASME 1999 International Mechanical Engineering Congress and Exposition, IMECE 1999
Country/Territory	United States
City	Nashville
Period	11/14/99 → 11/19/99

Bibliographical note

Publisher Copyright:
© 1999 American Society of Mechanical Engineers (ASME). All rights reserved.

ASJC Scopus subject areas

Mechanical Engineering

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10.1115/IMECE1999-0663

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@inproceedings{97f3b5da886341068dccde30b22bbca3,

title = "DETERMINING KEYHOLE STABILITY FOR PLASMA ARC WELDING PROCESS CONTROL",

abstract = "Stability of the keyhole plays a fundamental role in producing quality welds in keyhole plasma arc welding. Currently, keyhole size is assumed to be a measurement of its stability. To verify this idea, keyhole and weld pool were simultaneously imaged from the opposite side of the welding torch. Experimental results revealed that the width of the keyhole was not correlative with the stability of the keyhole: as long as the keyhole mode was maintained, the width remained constant despite the changes in the welding current and speed. However, it can be used to estimate the lower limit of the pool width for preventing keyhole collapse. Also, the upper limit of the pool width for preventing bum-through is approximately fixed for given applications. Hence, in this sWdy, pool width, its upper limit, and keyhole width were used to determine the margins of the process from collapse and bum-through. To measure the state of the stability of the keyhole process, the stability distance and stability factor were proposed. Based on the imaging system used, the state of the stability can be monitored in real-time.",

author = "Shaobin Zhang and Zhang, {Yu Ming}",

note = "Publisher Copyright: {\textcopyright} 1999 American Society of Mechanical Engineers (ASME). All rights reserved.; ASME 1999 International Mechanical Engineering Congress and Exposition, IMECE 1999 ; Conference date: 14-11-1999 Through 19-11-1999",

year = "1999",

doi = "10.1115/IMECE1999-0663",

language = "English",

series = "ASME International Mechanical Engineering Congress and Exposition, Proceedings (IMECE)",

pages = "123--129",

booktitle = "Manufacturing Science and Engineering",

}

Zhang, S & Zhang, YM 1999, DETERMINING KEYHOLE STABILITY FOR PLASMA ARC WELDING PROCESS CONTROL. in Manufacturing Science and Engineering. ASME International Mechanical Engineering Congress and Exposition, Proceedings (IMECE), vol. 1999-U, pp. 123-129, ASME 1999 International Mechanical Engineering Congress and Exposition, IMECE 1999, Nashville, United States, 11/14/99. https://doi.org/10.1115/IMECE1999-0663

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AU - Zhang, Shaobin

AU - Zhang, Yu Ming

PY - 1999

Y1 - 1999

N2 - Stability of the keyhole plays a fundamental role in producing quality welds in keyhole plasma arc welding. Currently, keyhole size is assumed to be a measurement of its stability. To verify this idea, keyhole and weld pool were simultaneously imaged from the opposite side of the welding torch. Experimental results revealed that the width of the keyhole was not correlative with the stability of the keyhole: as long as the keyhole mode was maintained, the width remained constant despite the changes in the welding current and speed. However, it can be used to estimate the lower limit of the pool width for preventing keyhole collapse. Also, the upper limit of the pool width for preventing bum-through is approximately fixed for given applications. Hence, in this sWdy, pool width, its upper limit, and keyhole width were used to determine the margins of the process from collapse and bum-through. To measure the state of the stability of the keyhole process, the stability distance and stability factor were proposed. Based on the imaging system used, the state of the stability can be monitored in real-time.

AB - Stability of the keyhole plays a fundamental role in producing quality welds in keyhole plasma arc welding. Currently, keyhole size is assumed to be a measurement of its stability. To verify this idea, keyhole and weld pool were simultaneously imaged from the opposite side of the welding torch. Experimental results revealed that the width of the keyhole was not correlative with the stability of the keyhole: as long as the keyhole mode was maintained, the width remained constant despite the changes in the welding current and speed. However, it can be used to estimate the lower limit of the pool width for preventing keyhole collapse. Also, the upper limit of the pool width for preventing bum-through is approximately fixed for given applications. Hence, in this sWdy, pool width, its upper limit, and keyhole width were used to determine the margins of the process from collapse and bum-through. To measure the state of the stability of the keyhole process, the stability distance and stability factor were proposed. Based on the imaging system used, the state of the stability can be monitored in real-time.

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ER -

DETERMINING KEYHOLE STABILITY FOR PLASMA ARC WELDING PROCESS CONTROL

Abstract

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Conference

Bibliographical note

ASJC Scopus subject areas

Access to Document

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