Sensing controlled pulse key-holing condition in plasma arc welding

Chuan bao JIA, Chuan song WU, Yu ming ZHANG

Research output: Contribution to journalArticlepeer-review

46 Scopus citations


According to the strategy of controlled pulse key-holing, a new sensing and control system was developed for monitoring and controlling the keyhole condition during plasma arc welding (PAW). Through sensing and processing the efflux plasma voltage signals, the quantitative relationship among the welding current, efflux plasma voltage and backside weld width of the weld was established. PAW experiments show that the efflux plasma voltage can reflect the state of keyhole and backside weld width accurately. The closed-loop control tests validate the stability and reliability of the developed keyhole PAW system.

Original languageEnglish
Pages (from-to)341-346
Number of pages6
JournalTransactions of Nonferrous Metals Society of China (English Edition)
Issue number2
StatePublished - Apr 2009

Bibliographical note

Funding Information:
Foundation item: Project(50540420570) supported by the National Natural Science Foundation of China; Project(07-12-002) supported by the Innovative Conception Fund of the Welding Institution of Chinese Mechanical Engineering Society Corresponding author: WU Chuan-song; Tel: +86-531-88392711; E-mail: DOI: 10.1016/S1003-6326(08)60275-7


  • controlled pulse key-holing
  • efflux plasma voltage
  • keyhole
  • plasma arc welding

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Geotechnical Engineering and Engineering Geology
  • Metals and Alloys
  • Materials Chemistry


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