基于斜入射模式的点焊接头超声检测方法  

Spot weld ultrasonic testing method based on oblique incidence mode

作　　者：汤传业[1,2] 

机构地区：[1]东南大学仪器科学与工程学院,江苏南京210096 [2]安徽新华学院电子通信工程学院,安徽合肥230088

出　　处：《合肥工业大学学报（自然科学版）》2013年第3期265-270,共6页Journal of Hefei University of Technology：Natural Science

基　　金：安徽省高校省级自然科学研究资助项目(KJ2010B074);安徽省高校省级优秀青年人才基金资助项目(2010SQRL198)

摘　　要：文章提出了一种基于斜入射模式的点焊超声检测方法;详细阐述了斜入射模式检测原理,研究了基于斜入射模式的点焊接头焊核直径的定量测量方法和焊点气隙薄层的定性评价与定量检测方法,讨论了焊点压痕、焊核形状和声束散射等因素对实际焊点检测的影响;对实际焊点进行了超声检测,结合破坏性试验测量数据,对比分析了声压幅值-熔核直径理论曲线与实际特性。结果表明,理论与实验吻合较好,该方法可用于定量测量焊核直径以及定性评价焊点质量。A spot weld ultrasonic testing method based on oblique incidence mode is presented.The testing principle of oblique incidence mode is illustrated.The methods of quantitative testing of welding core diameter based on oblique incidence mode and qualitative estimation and quantitative testing of air gap layer are studied.The effect of several factors including spot weld indentation,welding core shape and beam scattering on the spot weld testing is discussed.Theoretical and fitting curves of ultrasonic pressure amplitude and welding core diameter are analyzed comparatively with the data of practical spot weld ultrasonic testing and destructive measurement.The results indicate that the theoretical results and the experiment results coincide,and this method can be used for quantitatively calculating the welding core diameter and qualitatively evaluating the spot weld quality.

关 键 词：斜入射模式 焊核直径 气隙薄层 焊点检测 

分 类 号：TG115.285[金属学及工艺—物理冶金]