Boss -specific Paint Deposition Modeling and Evaluation of Paint Blocking in Spray Painting Robot

This study developed and validated a boss-specific paint deposition model that considers the phenomenon of paint blockage during boss painting. In our previous study, we focused on variations in the film thickness distribution depending on the impact angle and spray distance but did not consider painting on protruding shapes such as bosses. In boss painting, there is a shadow space in which the paint is blocked and difficult to apply. Therefore, we geometrically and mathematically derived the shadow space. To confirm the validity of the boss-specific paint deposition model, qualitative and quantitative evaluations were performed. In the qualitative evaluation, the results of the prediction using the model were compared with the results of computational fluid dynamics and the actual phenomena to confirm whether the prediction was appropriate. For quantitative evaluation, we conducted painting tests on a target with a boss placed in the center of a flat plate and compared the results of actual measurements and predictions to verify the validity of the predictions. Consequently, the results confirmed that the prediction of film thickness using the model appropriately considered paint blockage. The accuracy of the predicted values was also confirmed. Thus, the validity of the proposed model was confirmed.