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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。
The use of automatic plasma spraying process to repair the worn roller surface of a large roll crusher is of crucial importance for the spray control model. According to the plasma spraying process, the coating thickness model of the spraying point is established and the parameters of spray coating that affect the thickness of the repairing coating are analyzed. The corresponding control model is established by the relationship between the variable parameter and the coating thickness. Finally, the control model is simulated by MATLAB Analysis, verify its reliability. The simulation results show that for the crushing roller with the radius of 600 mm and the length of 1000 mm, the control model controls the amount of powder spray and the spraying pass, and the repair coating with the same wear amount can be obtained.