分析过磷酸钙混化工段化成室内切削机传动竖轴外伸轴颈断裂原因,改进竖轴轴头结构和提高轴头表面加工精度,有效减小轴颈部位的应力集中,提高疲劳极限,延长了竖轴使用时间,并改用焊接修复断轴的方法,抢修时间由原来的4～5d减少到12h。 Analyze the reasons that the superphosphate mixing section is transformed into the outburst shaft breakage of the vertical shaft of the indoor cutting machine, improve the vertical shaft head structure and improve the machining precision of the shaft head surface, effectively reduce the stress concentration at the journal portion, increase the fatigue limit, The use of vertical axis to extend the time, and use the method of repairing the broken shaft instead of welding, repair time from the original 4 ~ 5d reduced to 12h.