Using either Mean or RMS values to represent current in modeling of arc welding bead geometries

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• 作者：Diego Costa Correia Silva ^{diego.dccs@gmail.com" class="auth_mail" title="E-mail the corresponding author} ; Amé ; rico Scotti ; ^{ascotti@ufu.br" class="auth_mail" title="E-mail the corresponding author} ; ^{ascotti@mecanica.ufu.br" class="auth_mail" title="E-mail the corresponding author}
• 关键词：Welding bead modeling ; Current ; Mean value ; RMS value
• 刊名：Journal of Materials Processing Technology
• 出版年：2017
• 出版时间：February 2017
• 年：2017
• 卷：240
• 期：Complete
• 页码：382-387
• 全文大小：1257 K

文摘

With the objective of assessing the representability of current signal on modeling of bead geometries, a series of experiments were carried with GTAW under parametric conditions in which the RMS values were increased while the Mean values were kept the same and vice-verse. The weight of each current representation on bead geometry was searched using penetration, fused area and bead width as responses. To confirm the results, the potential heat transferred into the plate was estimated by cryogenic calorimetry and the weights of current representations were also assessed. It was concluded that both forms of current representation (Mean and RMS values) must be used if a more precise model of bead geometry is pursued, at least for GTAW with no material feeding.