ＧＭＡ溶接におけるアークセンサの感度向上と信頼性改善に関する研究　（第２報）　直流オープンアークＭＩＧ／ＭＡＧ溶接におけるアークセンサの動特性の解析

• 牛尾 誠夫

  大阪大学溶接工学研究所

• 毛 文傑

  大阪大学大学院

書誌事項

タイトル別名

• A Study of the Improvement in the Sensitivity and the Reliability of the Arc Sensor in GMA Welding. (2nd Report). An Analysis of the Dynamic Characteristics of the Arc Sensor for DC MIG/MAG Welding in Open Arc Mode.
• A Study of the Improvement in the Sensitivity and the Reliability of the Arc Sensor in GMA Welding (2nd Report)
• GMA溶接におけるアークセンサの感度向上と信頼性改善に関する研究(第2報)

抄録

In order to improve the sensitivity and reliability of the arc sensor, it is necessary to know how its characteristics change with the welding circuit conditions and the welding process variables and so on, because the sensor simply uses the electric signals — the weling current and/or the welding voltage as it's outputs. The present work has theoretically analyzed these relationships based on the nonlinear and the linearized models of the arc sensor. The analyses were made in time-domain and in frequency-domain. The results have revealed that the welding loop inductance Lw shows a little effects on the characteristics of the arc sensor if the variation frequency (f) of the torch height is lower than about 6 Hz, but its effect becomes greater in higher frequency range and increases with increasing f. The equivalent output resistance Ks (the slope of U-I (voltage-current) characteristic) of welding power supply exhibits greater effect on the characteristics of the arc sensor in full frequency range. The change in compositions of electrode wire or in welding conditions also effects the characteristics of the arc sensor but these effects are small in extent compared with Lw and Ks.<BR>Finally, the real-time behaviour of the arc sensor during the welding for a V-type joint groove was simulated, and the results were discussed by combination of the frequency-characteristics of the arc sensor and real welding conditions. Based on these results, it may be a better selection to use the welding current rather than the voltage as a detected signal in lower frequency range, but it does not necessarily remain good way in high frequency range for current wave-form generally exihibits greater asymetry with respect to the center of groove and current response also normolly declines with increasing f for a conventional welding system.

収録刊行物

• 溶接学会論文集

  溶接学会論文集 14 (1), 108-115, 1996

  一般社団法人 溶接学会

キーワード

• Arc sensor
• Dynamic characteristic
• GMA welding
• Sensitivity
• Phase
• Inductance
• Welding power supply
• Welding variable
• Electrode wire

詳細情報

• CRID: 1390282679699631104
• NII論文ID: 130003764494
• DOI: 10.2207/qjjws.14.108
• ISSN: 24348252
• ISSN: 02884771
• 本文言語コード: ja
• データソース種別:
  • JaLC
  • Crossref
  • CiNii Articles
• 抄録ライセンスフラグ: 使用不可