800吨剪床是φ825初轧机的重要辅助设备(图1),在使用过程中压板系统的曲杆(图2)、双臂杆(图3)等构件多次发生显著塑性变形和疲劳断裂,严重影响了初轧机的正常生产.为找出变形和断裂的真正原因,防止类似事故发生,便对剪床进行了电测试验和分析. The 800 ton shear bed is an important auxiliary equipment for the φ825 primary rolling mill (Fig. 1). During the process, significant bending deformation and fatigue failure occurred in the bending bars (Figure 2) and double-arm bars (Figure 3) Seriously affecting the normal production of the initial rolling mill.In order to find out the true cause of deformation and fracture, to prevent similar accidents, the electric shears were tested and analyzed.