Before the construction of steel structure, it is indispensable to do a good job of the corresponding work, so as to improve the construction efficiency, but also to ensure its quality. Among them, it needs to do a good job of pre-treatment, what work should be done?
1. Joint design: The unilateral clearance of the joint of steel structure should be controlled between 0.08 and 0.2 mm, and the length of the weld is generally not more than 30 mm.
2. Surface treatment: Use alkali or metal cleaning fluid to clean the oil stain and other contaminants in the welded joint of steel structure, and then use a scraper (or coarse sandpaper, or copper brush, or wire brush) to scrape the insulation layer on the welded joint surface.
3. Welding of copper bar and aluminium bar (or copper wire and aluminium wire): Use alkali or metal cleaning fluid to clean the oil stain and other contaminants at the welding site, and then use copper brush (or steel wire brush, scraper, or rough sandpaper) to scrape the insulating layer on the surface of the welded joint.
Note: The steel structure can not be polished, because the brazing filler metal is welded by capillary action, which is not conducive to welding after polishing.
The above is a detailed introduction of the pre-treatment of steel structure. Before construction, we should do the corresponding preparatory work to minimize its damage, and pay attention to regular maintenance and maintenance, which is good for itself.