空気超音波によるスポット溶接ナゲット径の定量評価法の検討

• 徐 晨艶

  長岡技術科学大学 工学部

• 井原 郁夫

  長岡技術科学大学 工学部

• 高橋 学

  仙台高等専門学校 機械システム工学科

書誌事項

タイトル別名

• Non-Contact Determination of Nugget Size of Spot-Welding Using Focused Air-Coupled Ultrasound

抄録

Since the size and shape of a nugget of a spot weld are closely related to the bonding strength of the weld, their quantitative evaluations are very important to improve the reliability of the welded structures. In this work, a focused air-coupled ultrasound technique has been used for non-contact measurements of spot welds of steel plates. One-dimensional scanning in transmission configuration using a pair of focused air-coupled ultrasonic transducers operating with tone burst waves at 0.3 MHz is performed to obtain the amplitude profile of the transmitted ultrasound through the nugget area of a spot weld. A simple method for determining the nugget size from the amplitude profile is proposed. The validity of the method is verified using a calibration sample which imitates a spot weld. The proposed method has then been applied to the evaluations of spot welds fabricated with different electric currents.

収録刊行物

• 日本機械学会論文集Ａ編

  日本機械学会論文集Ａ編 77 (777), 745-748, 2011

  一般社団法人 日本機械学会

キーワード

• Ultrasonic Inspection
• Nondestructive Inspection
• Weld
• Nugget Size
• Air-Coupled Ultrasound
• Focused Ultrasound
• Steel Plate

詳細情報

• CRID: 1390001204478033920
• NII論文ID: 130000874061
• DOI: 10.1299/kikaia.77.745
• ISSN: 18848338
• ISSN: 03875008
• Web Site: http://www.jstage.jst.go.jp/article/kikaia/77/777/77_777_745/_pdf
• データソース種別:
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  • Crossref
  • CiNii Articles
  • KAKEN
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