导纸辊轴头断裂的原因分析及改进措施

Analysis about Rupture Shaft of Paper Guide Roll and Reform It

昆山钞票纸厂新安装的牵引压榨部等设备在正式投入试生产的初期,牵引压榨部的导纸辊操作面轴头频繁地出现断裂情况,严重影响了纸机的正常生产。对多个断裂轴头进行详尽分析后,发现该导纸辊在设计上存在不足之处:导纸辊操作侧轴头的疲劳强度过低,导致承受交变应力的轴头产生疲劳断裂。为此,针对提高轴头疲劳强度和降低交变应力,从2方面进行了相应的改进。改进后的导纸辊投入使用后,效果良好,经半年多运行,未发生轴头断裂现象。

The operating shafts of paper guide rolls are frequently ruptured after the new press equipment have been erected and run for a period of time in KunShan BankNote Paper Mill which influences our normal production. After analysing some ruptured shafts ,I made a conclusion that there are some shortage in designing. Because of low fatigue limitation of shaft enduring dynamic-load stress rupture is happened. To improve this I made a modification from two sides：to increase the fatigue limitation of shaft and to decrease dynamic-load stress. After modification we have a excellent result that no rolls are ruptured from then on.