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Application of Infrared Imaging for Quality Inspection in Resistance Spot Welds

机译：红外成像在电阻点焊质量检测中的应用

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摘要

Infrared thermal imaging method was applied for the development of a non-destructive inspection technique to determine the quality of resistance spot welds. The current work is an initial feasibility study based on post-mortem inspection. First, resistance spot welds were fabricated on dual phase steel sheets (DP 590 steel) with carefully-controlled welding parameters. It created welds with desirable and undesirable qualities in terms of nugget size, indentation depth, and voids and cracks. Second, five different heating and cooling methods were evaluated. The heating or cooling source was applied on one side of the weld stack while the surface temperature change on the other side of the weld was recorded using an infrared camera. Correlation between the weld quality and the "thermal signature" of each weld was established. Finally, a simplified thermal finite element analysis was developed to simulate the heat flow during inspection. The thermal model provided insight into the effect of the nugget size and indentation depth on the peak temperature and heating rate. The results reported in this work indicate that the IR thermography technique is feasible for weld quality inspection due to the distinguish temperature profiles for different welds and the repeatability and consistency in measurement.
机译：红外热成像法被用于无损检测技术的发展，以确定电阻点焊的质量。当前的工作是基于验尸的初步可行性研究。首先，电阻点焊是在双相钢板（DP 590钢板）上进行的，焊接参数受到严格控制。就熔核尺寸，压痕深度以及空洞和裂纹而言，它创建了具有理想和不良质量的焊缝。其次，评估了五种不同的加热和冷却方法。将加热或冷却源施加在焊缝堆的一侧，同时使用红外热像仪记录焊缝另一侧的表面温度变化。建立了焊缝质量和每个焊缝的“热特征”之间的相关性。最后，开发了简化的热有限元分析来模拟检查过程中的热流。通过热模型，可以洞悉熔核大小和压痕深度对峰值温度和加热速率的影响。这项工作报告的结果表明，红外热成像技术可用于焊接质量检查，这是因为不同焊缝的温度曲线具有明显的区别以及测量的可重复性和一致性。

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  • 来源
    《》|2009年|729912.1-729912.10|共10页
  • 会议地点 Orlando FL(US)
  • 作者

    Wanchuck Woo; Charles W. Chin; Zhili Feng; Hsin Wang; Wei Zhang; Hanbing Xu; Philip S. Sklad;

  • 作者单位

    Materials Science and Technology Division, Oak Ridge National Laboratory, Oak Ridge, TN, USA 37831 Neutron Science Division, Korea Atomic Energy research Institute, Daejeon, 305-353, South Korea;

    Department of Materials Science and Engineering, Johns Hopkins University, Baltimore, MD, USA 21218;

    rnMaterials Science and Technology Division, Oak Ridge National Laboratory, Oak Ridge, TN, USA 37831;

    rnMaterials Science and Technology Division, Oak Ridge National Laboratory, Oak Ridge, TN, USA 37831;

    rnMaterials Science and Technology Division, Oak Ridge National Laboratory, Oak Ridge, TN, USA 37831;

    rnMaterials Science and Technology Division, Oak Ridge National Laboratory, Oak Ridge, TN, USA 37831;

    rnMaterials Science and Technology Division, Oak Ridge National Laboratory, Oak Ridge, TN, USA 37831;

  • 会议组织
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 红外技术及仪器;
  • 关键词

    infrared imaging; resistance spot welding; non-destructive evaluation; dual phase steel; quality inspection; heat conduction; finite element analysis;

    机译：红外成像电阻点焊；无损评估；双相钢质量检验;导热有限元分析;

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