河北迁安唐钢棒磨山铁矿河北迁安064409电动挖掘机WK-4在使用过程中斗杆经常出现前挡板与前齿条接合处沿斗杆高度方向开裂现象。当裂纹沿腹板厚度、高度方向延伸,斗杆就报废了。为了延长旧斗杆的使用寿命,对斗杆的结构、工况等进行了分析和控制。1斗杆工作特点细长杆、大变载荷 Hebei Qian’an Tangshan Bangmoshan Iron Mine Hebei Qian’an 064409 Electric excavator WK-4 in the course of the stick often appear before the bezel and the front rack joints along the height direction of the arm cracking phenomenon. When the crack along the web thickness, height direction, the stick scrapped. In order to extend the service life of the old stick, the structure of the stick, working conditions were analyzed and controlled. 1 stick features slender rod, great load change