大型辊式破碎机磨损辊面的等离子喷涂控制模型研究

Study on control model of plasma spraying on wearing roll surface of large roll crusher

采用自动等离子喷涂工艺修复大型辊式破碎机磨损辊面,喷涂控制模型的研究至关重要。针对等离子喷涂工艺,建立了喷涂点的涂层厚度模型,分析影响修复涂层厚度的喷涂变参数;通过变参数与涂层厚度的关系,建立相应的控制模型;最后通过MATLAB对控制模型进行仿真分析,验证了其可靠性。仿真结果表明,对于半径为600 mm、长为1 000 mm的破碎辊,按控制模型控制喷粉量和喷涂道次,能获得与磨损量大体一致的修复涂层。

Study on control model of plasma spraying is vital on repairing wearing of roll surface of large roll crusher by using automatic plasma spraying process. According to the plasma spraying process, the model of coating thickness at spraying points was built, and spraying variable parameters affecting the coating thickness were analyzed. Corresponding control model was built after analyzing the relationship between spraying variable parameters and coating thickness. At last, MATLAB was applied to simulate and analyze the control model, and its reliability was verified. The simulation results showed the coating thickness obtained according to the spraying powder and the time of spraying of the control model approximately consisted with wearing amount for the crushing roll with radius being 600 mm and length being 1 000 mm.