電着塗装における仮想表面を使用した自動車ボディー全体の膜厚分布の数値解析

抄録

Because automobile bodies are so large and complicated, in the analyses of film thickness of electrodeposition coating undertaken to date, only the portion with thin coating film was calculable. Therefore, to study matters such as the electrode arrangement, bath structure, body size, coating voltage, coating time, and so on, analyses of the whole body structure are necessary. In this report of our study, a virtual surface with a simplified shape is introduced and analyses of the whole body are described. The area ratio of the actual coating surface and the virtual surface are defined as a surface coefficient, that is used in the governing equation of thickness analyses of coating by electrodeposition. A computer experiment based on the virtual surface was conducted. The calculated results showed good agreement with those from the asperity surface model. Results demonstrated that analyses of the whole body, including the solution of the thickness distribution of the side sill with a bad coating film distribution, are obtainable using the virtual surface model. Results show that the study of bath structure, operating conditions, and so on can be realized through analyses of the whole body using a virtual surface.