Double beam bridge crane main beam lower deflection deformation repair method

The invention provides a double beam bridge crane lower deflection deformation repair method. According to different deformation conditions of a bridge crane main beam lower deflection, different heating portions and area sizes are arranged to be subjected to moderate heating, the heating temperature is 500-1000 DEG C, then repair welding and reinforcement are performed utilizing channel steel, steel plate, angle steel and other materials, the production service life of a bridge crane is recovered and prolonged, and the production requirements are met. 种双梁行车下挠变形修复方法，根据不同行车主梁下挠变形的状况，设置不同的加热部位和区域大小进行适度加热，加热温度500-1000℃；再利用槽钢、钢板及角钢等材料进行修焊加固，恢复和延长行车的生产使用寿命，满足生产要求。