Simulating Electro-coating Of Automotive Body
Parts Using BEM
Author(s)
J. M. W. Baynham, R. Adey, V. Murugaian & D. Williams
Abstract
The simulation of electro painting has rapidly become a \“must-have” tool for
auto-manufacturers over the past three to four years. Various approaches have
been used in such simulation, including both FE and BE.
In this paper details of the boundary element based \“BEASY” Electro-coat
Modelling software are presented which allow car-body parts to be simulated.
Examples are presented showing application of the method. Drawbacks of the
method are discussed.
1 Introduction
One electro-painting process in use today involves immersing a metallic
(conducting) structure in a tank of water based paint, then passing a direct
current from anodes (also immersed in the paint) to the metallic structure which
forms the cathode.
Electrochemical processes at the cathode surface cause deposition of paint on
the surface. Since the deposited paint has electrical resistance, the electrical
fields in the tank are constantly changing as more and more paint is deposited.
Paint is deposited most rapidly where the current density is greatest. The
metal surfaces inside any cavities initially receive no current, but as the paint
film builds up on exterior surfaces, current begins to penetrate the cavities, and
deposition occurs here too.
The difficulty of coating inside cavities is that the wet paint film is never a
perfect insulator. Consequently current passing along the axis inside a hollow
Keywords
Related Book
Other papers in this volume
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