Orbital welding deformation control ends of the rails in advance paving height, according to the rail of the species, as well as fixed length and ambient temperature and other factors may be used in advance, gantry crane rail installation specifications, with copper plate and steel plate rail End paving 30 ~ 40mm, the use of ready-made bolts and plate and other couplings, tighten the nut in the rail track fixed beam, rail joints near each provided with at least four fixed points. Welded rail joint order is bottom-up, after the end of the first rail waist rail, rail head, layer by layer by road surfacing, patching around final. Range two ends of each rail 40mm, Hefei gantry crane rails, while inter-preheat, preheat and temperature control system at 300 ℃ ~ 350 ℃. The first layer of weld (base): Current 120A ~ 130A, gantry crane rails installed to prevent permanent steel plate copper plate will burn and melt, gantry crane rail installation, thereby reducing excluding copper plate The difficulty, shorten the track air cooling time, facilitate maintaining the temperature between layers, preventing hardening; later layers can be used (130 ± 15) A, each finished welding slag must be cleaned to continue welding; welding rail waist: Current 130 ~ 140A, from the lower back up welding, attention slag. Hefei gantry crane rail exhibition of Commerce Bo _ _ gantry crane rail prices provided by the Hefei exhibition Bo Trading Company. Hefei gantry crane rail exhibition of Commerce Bo _ _ gantry crane rail price Hefei Show Bo Trading Company (www.hfzhanbo.com) (www.hfzhanbo.com) this year introduced a new upgrade, the above picture is for reference only, please call Tel or pictures on this page, for the latest information, contact: Mr. Huang.