依据铁道部标准,钢轨必须经过超声探伤才能出厂。因进口设备的机械部分与现场的具体生产工艺不适应,所以作者主持开发了一套钢轨在线超声探伤仪的探头工作机构。两年多的运行结果表明,该机构运行性能良好。本文全面地介绍了这套设备的各个组成部分和设计原理。 According to the standards of the Ministry of Railways, the rail must be ultrasonic flawed before it leaves the factory. Due to the mechanical part of the imported equipment is not suitable for the specific production process at the scene, the author presided over the development of a set of probe working mechanism of on-line ultrasonic flaw detector. More than two years of operation results show that the agency operating performance is good. This article presents a comprehensive introduction to the various components and design principles of this device.