Effect of electrostatic rotating bell atomizer parameters on automotive paint quality and deposition efficiency

汽车涂料使用静电旋转钟(ESRB)雾化器，可提供高度均匀的薄膜厚度。机器人操作员在车身上移动油漆雾化器，可能需要几个月的时间来优化机器人路径，以最大限度地减少油漆消耗和涂抹时间，同时沉积出可接受的均匀薄膜。确定给定喷涂路径产生的膜厚并确定雾滴大小分布和速度等喷涂参数将具有重要的商业价值，从而提供最佳的涂料质量。在这个合作项目中，我们建议：-将涂料质量和转移效率的变化与液滴尺寸分布和ESRB雾化器产生的喷雾图案相关联。-建立将液滴尺寸和喷雾图案的变化与漆膜变化联系起来的物理机制。将通过直接对喷雾成像并使用图像分析软件来确定液滴直径来测量液滴尺寸分布。水滴大小的变化将与油漆颜色的变化相关。将拍摄液滴撞击表面的高速视频。将进行实验室实验，研究液滴对表面的撞击，涂料液滴的蒸发速度，并建立预测涂料膜厚度随液滴质量通量的函数关系的模型。

Automotive paints are applied using Electrostatic Rotating Bell (ESRB) atomizers that deliver a highly uniform film thickness. Robot manipulators move the paint atomizers over the car body and it can take months to optimize the robot path to minimize paint consumption and application time while depositing a film with acceptable uniformity. It would be of significant commercial value to identify the film thickness resulting from a given spray path and determine spray parameters such as droplet size distribution and velocity that gives the best paint quality. In this collaborative project we propose to:- Correlate changes in paint quality and transfer efficiency with droplet size distributions and the spray pattern produced by ESRB atomizers.- Establish the physical mechanism that links changes in droplet size and spray pattern to changes in the paint filmDroplet size distributions will be measured by directly imaging the spray and using image analysis software to determine droplet diameters. Changes in droplets sizes will be correlated with shifts in paint colour. High speed videos will be taken of droplet impingement on surfaces. Laboratory experiments will be done to study droplet impingement on surfaces, the rate of evaporation of paint droplets and models will be developed to predict paint film thickness as a function of the droplet mass flux.