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

汽车油漆使用静电旋转钟（ESRB）雾化器，提供高度均匀的膜厚度。机器人操纵器在车身上移动油漆雾化器，可能需要数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应用时间，同时沉积具有可接受均匀性的薄膜。确定由给定喷涂路径产生的膜厚度并确定给出最佳油漆质量的喷涂参数（例如液滴尺寸分布和速度）将具有显著的商业价值。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ESRB雾化器产生的液滴尺寸分布和喷雾模式相关联。建立将液滴尺寸和喷涂模式的变化与漆膜变化联系起来的物理机制液滴尺寸分布将通过直接对喷涂进行成像并使用图像分析软件确定液滴直径来测量。液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，研究液滴在表面上的撞击，油漆液滴的蒸发速率，并将开发模型，以预测作为液滴质量流量函数的漆膜厚度。

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.