A parameterized deposition rate model of electrostatic spraying rotating bell atomizer / Peilun Zhang in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 20, N° 3 (05/2023)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 20, N° 3 (05/2023) . - p. 1019-1037 Titre : A parameterized deposition rate model of electrostatic spraying rotating bell atomizer Type de document : texte imprimé Auteurs : Peilun Zhang, Auteur ; Weiguo Gao, Auteur ; Chen Zhao, Auteur ; Xuhao Wang, Auteur ; Xiangzhi Meng, Auteur Année de publication : 2023 Article en page(s) : p. 1019-1037 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Atomiseurs Automobiles -- Revêtements Cloche rotative Primaire (revêtement) Pulvérisation électrostatique Revêtements:Peinture Système de projection Index. décimale : 667.9 Revêtements et enduits Résumé : Compared with spray gun painting, electrostatic spraying rotating bell (ESRB) painting can provide better film-forming quality and higher adhesion rate, which is more suitable for automobile base coating. However, the complexity of the spray pattern of the ESRB and the automobile surface geometric makes the spray process planning a more challenging problem. This paper aims to provide a new parameterized model of the ESRB to facilitate the thickness calculation and trajectory planning in the off-line painting programming. Firstly, according to the distribution characteristics of paint particles and the force analysis of adhesion process, a new static deposition rate model—offset asymmetric Gaussian model is proposed on the plane. The parameters in the new model have intuitive practical significance and can fully reflect the characteristics of ESRB coating deposition rate. Then based on the analysis of the relationship between the static model and uniform linear spraying deposition, the static model is established by measuring the layer data of corresponding uniform linear spraying. In order to further simulate the paint thickness on curved surfaces, the projection model with variable spraying distance and deposition point normal deflection is also deduced. Finally, a parameterized static model and sampling points library are established which provide efficient and accurate prediction of static deposition result, and is more suitable for off-line programming. Three different groups of simulation proved that the proposed static deposition rate model has high calculation accuracy for different working conditions and fast simulation speed for different spraying parameters. Note de contenu : - EXPERIMENT - DEPOSITION RATE MODEL OF ESRB : ESRB static deposition rate model - Uniform spraying thickness and static model calculation - ESRB static model curved surface projection - ESRB static model parameter library - VERIFICATION : Universality verification of the static deposition rate model of ESRB - Surface projection model - Parameterized model - Table 1 : Parameters of ESRB spraying - Table 2 : Parameters of ESRB static model at different heights - Table 3 : Value range and reference value of ESRB spraying parameters - Table 4 : DURR EcoBell3 Cx atomizer technical data - Table 5 : Parametric verification experiment DOI : https://doi.org/10.1007/s11998-022-00721-y En ligne : https://link.springer.com/content/pdf/10.1007/s11998-022-00721-y.pdf?pdf=button% [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=39445 [article]

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A parametric distribution model of electrostatic spray rotating bell and application for automobile painting / Peilun Zhang in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 20, N° 5 (09/2023)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 20, N° 5 (09/2023) . - p. 1727-1745 Titre : A parametric distribution model of electrostatic spray rotating bell and application for automobile painting Type de document : texte imprimé Auteurs : Peilun Zhang, Auteur ; Weiguo Gao, Auteur ; Chen Zhao, Auteur ; Hao Liu, Auteur ; Xuhao Wang, Auteur ; Xiangzhi Meng, Auteur Année de publication : 2023 Article en page(s) : p. 1727-1745 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Automobiles -- Revêtements:Automobiles -- Peinture Cloche rotative Pulvérisation électrostatique Tags : '  Atomiseur  ESRB'  'Pulvérisation  automobile'  'Modèle  de  distribution  d'épaisseur'  'Simulation  d'épaisseur  revêtement'  'Programmation  hors  ligne' Index. décimale : 667.9 Revêtements et enduits Résumé : Compared with spray gun spraying, electrostatic spray rotating bell (ESRB) spraying can provide better film forming quality and higher adhesion rate, which is more suitable for the automobile painting. However, the complexity of the automobile surface geometry and the spray pattern produced by ESRB painting makes the trajectory planning and the determination of spraying parameters challenging. This research presents a coating thickness distribution model for ESRB atomizer with uniform motion and establishes a parametric model to express the functional relationship between the thickness distribution model and atomizer parameters. The proposed parametric model aims to provide a guideline for the determination of spraying parameters in the process of off-line programming in the painting industry. Firstly, a novel feature points fitting distribution model was established based on the characteristics of ESRB uniform linear spraying coating. The model can fully visualize the cumulative profile characteristics of coatings. Secondly, the orthogonal experiment, multilevel and multifactor, was designed to analyze the variation of feature points with the painting parameters. Then, based on the requirements of the spraying process, an objective function is established for the coating thickness and other indicators of each area, and a genetic algorithm is used to solve it, so as to determine the ESRB spraying parameters. Finally, three simulation experiments show that the new model is effective and has high prediction accuracy, which can be effectively applied to the ESRB spraying system. Note de contenu : - ESRB SPAYING THICKNESS DISTRIBUTION MODEL AND PARAMETERIZATION METHOD : Working principle and parameters of ESRB - ESRB uniform linear motion spaying distribution model - Experimental design and data processing - ESRB parametric distribution model - APPLICATION OF PARAMETRIC DISTRIBUTION MODEL IN OFF-LINE PLANNING : Spraying trajectory of raster pattern - Optimization of spraying parameters - EXPERIMENTS AND VERIFICATION : Accuracy verification of predicting spray distribution model - Application of parametric distribution model in off-line programming DOI : https://doi.org/10.1007/s11998-023-00777-4 En ligne : https://link.springer.com/content/pdf/10.1007/s11998-023-00777-4.pdf?pdf=button% [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=39984 [article]

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Thin liquid films on a rotary bell atomizer in surface-following coordinates / Mark Doerre in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 19, N° 3 (05/2022)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 19, N° 3 (05/2022) . - p. 939-945 Titre : Thin liquid films on a rotary bell atomizer in surface-following coordinates Type de document : texte imprimé Auteurs : Mark Doerre, Auteur ; Nelson K. Akafuah, Auteur Année de publication : 2022 Article en page(s) : p. 939-945 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Atomisation Automobiles -- Revêtements:Automobiles -- Peinture Cloche rotative Fluides, Mécanique des Revêtements -- Appareils et matériels:Peinture -- Appareils et matériels Index. décimale : 667.9 Revêtements et enduits Résumé : This article analyzes a published formulation of the Navier–Stokes equations cast into surface-following coordinates and provides some additional mathematical background to follow the article. Ubiquitous in the paint shops of automotive plants around the world, a high-speed rotary bell is succinctly described as a rapidly spinning concave axisymmetric surface with liquid paint supplied from a port coinciding with the center of rotation. The spinning surface transfers momentum to the paint film causing it to flow outward. Upon reaching the bell periphery, it is flung off, subsequently forming an atomized spray transferred to an automotive body through advection and electrostatics. Common analytical frameworks of rotating films were spherical or cylindrical coordinate systems where the wetted surface profile of the bell was constrained to follow a coordinate axis. This led to solutions for films modeled with conical, disk-like, or partial hemispherical profiles. An alternative was a more general case using a surface-following orthogonal curvilinear coordinate system along with its derived vector operators. In the unique case of a thin film, these results validated a simpler pattern found in common coordinate systems. Note de contenu : - Example in literature - Surface-following coordinate system - Table 1 : Summary of prior works in common coordinate systems DOI : https://doi.org/10.1007/s11998-021-00571-0 En ligne : https://link.springer.com/content/pdf/10.1007/s11998-021-00571-0.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=38092 [article]

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