Comprehensive optimization technology of scraper angle in sunk roll system for hot dip galvanizing unit
The zinc slag was not scraped clean on the surface of sunk roll system in hot dip galvanizing unit,which resulted in many roll printing defects on the surface of galvanized steel strip,so the quality grade of the strip products was seriously decreased.Fully considering the equipment and process characteristics of the hot-dip galvanizing unit,a scraper force correction model based on influencing factors is established according to the force analysis of the sinking roller system scraper mechanism.The net force of the external load and its direction angle of each roller in the system were established by using strip element method,and the contact condition criterion of journal and bearing bush of the roll system was formed.On this basis,a comprehensive optimization model of scraper angle was established,which took the thickness of residual zinc residue on the surface of sunk roller system as the optimization objective function.Finally,the comprehensive technology of scraper angle for sunk roll system was applied to the hot dip galvanizing unit of a domestic iron and steel enterprise.Two typical steel strips were selected to compare the thickness of residual zinc slag on roll surfaces before and after optimization.Field measurement shows that the optimization technology reduces the deposition of zinc slag thickness on each roll surface of sunk roller system and can effectively reduce the incidence of roller printing defects on the strip surface.
hot dip galvanizingsunk roll systemcomprehensive optimization of scraper anglecontact condi-tion criterionresidual zinc slag thickness
万方数据
维普
