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铸铝合金构件R角涡流检测试验研究
Experimental Study on R-angle Eddy Current Detection of Cast Aluminum Alloy Members
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- DOI:
- 作者:
- 汪洪量，卢新亮
WANG Hongliang, LU Xinliang
- 作者单位:
- 国营芜湖机械厂，安徽 芜湖 241000
State-owned Wuhu Machinery Factory, Wuhu 241000, China
- 关键词:
- R 角区域；屏蔽层；激励频率；硅钢；检测幅值
rangle area; shielding layer; excitation frequency; silicon steel; detection amplitude
- 摘要:
- 针对飞机机体结构 R 角区域检测难问题，设计研发了铸铝合金 R 角涡流检测探头，结合 R 角实际检测工
况，提出采用硅钢作为涡流探头的屏蔽层，可有效屏蔽金属对检测信号的影响；进行了检测工艺参数优化试验，确定了
最佳的检测频率，以实现对飞机机体结构 R 角区域裂纹的快速可靠检测。 试验结果表明：在激励频率为 400 kHz 时，检
测信号幅值达到最大，研制的屏蔽涡流探头可有效检出裂纹参数为 5.00 mm×0.13 mm×0.20 mm(长×宽×深)的人工缺陷，
且能够对缺陷进行精准定位，为飞机铸铝合金 R 角裂纹的定量检测提供依据。
Aiming at the difficult problem of detecting the R-angle region of aircraft structure, a die-cast aluminum alloy R-angle eddy current detection probe was designed and developed. Combining with the actual detection condition of R-angle, it was proposed to use silicon steel as the shield layer of eddy current probe, which can effectively shield the influence of metal on the detection signal. In order to realize the rapid and reliable detection of the crack in the R-angle region of the aircraft structure, the optimum detection frequency was determined. The results show that when the excitation frequency is 400 kHz, the detection signal amplitude reaches the maximum. The developed shielded eddy current probe can effectively detect the artificial defects with crack parameters of 5.00 mm×0.13 mm×0.20 mm (length×width×depth), and can accurately locate the defects. It provides the basis for quantitative detection of R-angle crack in aircraft cast aluminum alloy.