轮毂轴承滚道成形缺陷超声相控阵检测技术

Ultrasonic phased array detection technology of forming defects of wheel hub bearing raceway

为解决第3代汽车轮毂轴承滚道近表面缺陷检测问题,围绕滚道曲面半径小和空间狭窄、超声换能器耦合困难、超声声束畸变与散射严重等问题,开展了检测工艺设计、曲面声场解析及人工缺陷试块检测实验验证工作。针对轮毂轴承滚道复杂曲面结构,设计了水浸超声相控阵检测工艺。通过K-wave软件模拟了换能器声场分布规律并确定了探头参数。开展了轮毂轴承近表面缺陷超声相控阵检测实验,结果表明,该方法可实现近表面1 mm、Ф1 mm缺陷的检出,采用超声相控阵线性聚焦扫描成像算法可以提高曲面结构下的声波入射能量,减小轮毂轴承近表面盲区,提高近表面缺陷分辨率。

To solve the problems of the near surface defects detection of the third generation automobile wheel hub bearing raceway,focusing on the problems of small radius and narrow space of the raceway surface,difficult coupling of the ultrasonic transducer,and serious distortion and scattering of the ultrasonic beam,the inspection process design,surface sound field analysis and artificial defect test block inspection experiments vertification were carried out.Aiming at the complex curved surface structure of wheel hub bearing raceway,the water immersion ultrasonic phased array detection technology was designed.The sound field distribution of the transducer was simulated by K-wave software,and the probe parameters were determined.The ultrasonic phased array detection experiments of near surface defects of wheel hub bearing were carried out.The results show that this method can achieve the near surface 1 mm,Ф1 mm defects detection,using the ultrasonic phased array linear focus scanning imaging algorithm can improve the incident energy of sound wave under the curved structure,reduce the near surface blind area of wheel hub bearing and improve the resolution of near surface defects.