In order to ensure the quality of main beam production, the stop-check point system table of key process quality of main beam production is established. The quality of each process in the production of the main beam is strictly carried out according to its inspection. The welding team adopts a rigid and fixed way to ensure that the dimensions between each part meet the requirements of the drawing. The splicing of the steel plate is performed by argon-rich mixed gas shielded welding (MAG) + submerged arc automatic welding (SAW), the internal seam is welded by argon-rich mixed gas shielded welding (MAG), and the external fillet weld is welded by submerged arc automatic welding (SAW). Ensure external and internal weld quality. UT inspection of upper cover plate, lower cover plate and web butt weld. Welding specifications are selected according to the thickness of the material and the welding position. Before welding, clean the rust, oil, water and other debris within 20mm on both sides of the groove and weld area, and use the arc plate and arc plate.
