Simulation of near bell paint break-up in electrostatic painting
Björn Andersson, Fraunhofer-Chalmers Centre/Chalmers
Valeri Golovichev, Chalmers
Andreas Mark, Fraunhofer-Chalmers Centre
|Sponsors:||Fraunhofer-Chalmers Centre, Vinnova|
|Start of project:||November 2009|
Paint and surface treatment processes in the car paint shop are to a large extent automated and performed by robots. Having access to tools that incorporate the flexibility of robotic path planning with fast and efficient simulation of the processes is important to reduce the time required for introduction of new car models, reduce the environmental impact and increase the quality.
In spray painting paint primer, color layers and clear coating are applied through the Electrostatic Rotary Bell Sprayer (ERBS) technique. Paint is injected at the centre of a rotating bell; the paint forms a film on the bottom side of the bell and is atomized at the edge. In the current version of the FCC software IPS Virtual Paint the atomization step is not simulated instead measurements of droplet size and velocity distributions close to the bell are required as input.
The objective is to predict the size and velocity
distributions of the droplets at some small distance away
from the bell where the break-up is completed. To achieve
this, the Lagrangian method Smoothed Particle
Hydrodynamics (SPH) is chosen for the liquid paint phase.
The larger volume fraction of the air part is on the
other hand handled with an Eulerian Finite Volume solver.
In the project the two discretization methods are coupled
and models of the relevant physics in the paint break-up
are developed and implemented.
This page, should be part of a frames system at www.tfd.chalmers.se/~lada/projects/proind.html