介绍了一种适用于小型杆状零件的双工位磁粉探伤机。该机采用复合磁化方法进行探伤检查, 其中周向磁化利用交流电完成, 纵向磁化利用两个磁化线圈中通入的脉冲直流电实现。详细说明了该机的机械结构和磁化电流调整线路。实际使用时可根据需要选择复合磁化、周向磁化或纵向磁化。该机可通过调节控制面板上的电位器, 方便地调节磁化电流。试验表明, 该机能够高效地实现杆状零件的探伤检查, 满足探伤规范要求, 保证检查结果可靠性。

A kind of duplex working positioned magnetic particle testing machine for miniature rod-shaped parts was introduced, where composite magnetization method was used. Circumferential magnetization was completed by the alternating current, while longitudinal magnetization was completed by the rectified alternating current in two magnetizing coils. The characters of its mechanical structure and magnetization current regulation circuitry were described in detail. Magnetization method should be selected among composite magnetization, circumferential magnetization and longitudinal magnetization according to the demands. Magnetization current could be regulated conveniently by the potentiometers in the control panel. Experiments had proved that the inspection of rod-shaped parts by the machine was efficient, meanwhile, the inspection met the requirements of magnetic particle testing and guaranteed the reliability.