起重机起重臂在施工作业时造成意外损坏,用户会针对其损坏变形的程度权衡利弊得失,决定究竟是报废更新还是进行修复。事实上,经过修复继续使用的也不在少数。国外制造商对此一般持否定态度,强调修复的起重臂无法满足起重机的安全性能,而国内起重机制造商则没有要求必须更换新件。用户对损坏的起重臂是否进行修复应作慎重的抉择,决不能将修复质量得不到保证的起重臂盲目使用。至于修复后的起重臂能否承受原有额定的载荷,维修前应做必要的力学计算、材质分析、焊条选用、整形接补和焊接工艺设 Crane boom in construction operations caused by accidental damage, the user will weigh the extent of damage to the pros and cons of the pros and cons, decide whether to scrap or update or repair. In fact, after the repair to continue to use is also a small number. Foreign manufacturers generally negative attitude, emphasizing the repair of the crane can not meet the safety performance of cranes, and domestic crane manufacturers did not require the need to replace the new pieces. The user should make a careful decision as to whether the damaged boom should be repaired, and must never blindly use the jib that can not be repaired. As for the repair of the boom can withstand the original rated load, repair should be done before the necessary mechanical calculations, material analysis, electrode selection, plastic patch and welding technology