大尺寸表面喷涂的交界区涂层均匀性分析

Analysis of Coating Uniformity in Boundary Zone of Surface Spraying with Large-size

针对喷涂机器人利用空气喷枪在大尺寸表面自动喷涂时面片交界区的涂层厚度均匀性难以保证问题,首先分析了导致涂层厚度偏差的原因,然后通过对平板匀速直行实验数据进行拟合,建立了一个具有喷涂起始、终止位置处涂层厚度分布描述的喷枪模型。在此模型基础上,对面片交界区的横向搭接参数进行了分析与数学最优值区间求解,得到了最优取值区间为0.2~0.4的结论。最终通过多组对比试验证明此参数准确,能够有效改善面片交界区的涂层厚度均匀性。

In response to the difficulty in ensuring uniformity of coating thickness in the boundary area of face sheets when the sparying robot automatically coats a large surface with an air spraying gun, the causes of coating thickness deviation were firstly analyzed, and then a spraying gun model with the description of coating thickness distribution at the start and end positions of spraying was established by fitting the experimental data of the flat plate at a uniform straight line. On the basis of the present model, the transverse lap parameters of the boundary area of the face sheet were analyzed and optimal value interval solving,and the optimal value interval is 0.2-0.4 was obtained. Finally, the present processing parameter is proved to be accurate and can effectively improve the coating thickness uniformity in the boundary area of the face sheet through multiple comparison tests.