1. First, the overhead brideg crane steel plate should have blasting derusting processing, in order to improve paint adhesion.
2. Abdomen steel plate and upper cover plate should have camber, according to overhead bridge crane span process conditions, first apply corresponding second degree curve, forth degree curve and superimposed curve, calculated by the computer to select the high point, produce model, according to model to cut steel.
3. The overhead bridge crane main beam have special welding tools and reasonable welding procedure, automaticly symmetrical welding, rationally select current size and welding speed, reduce welding deformation.
4. The main beam, end beam, abdomen steel plate and upper cover plate's butt welds and longitudinal welds all apply union melt welding, and 100% inspection after welding.
5. The bridge beam's butt joint and mian beam, end beam butt joint all apply platform lofting, position, lifting flip, to ensure the physical dimension, control welding deformation.
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