Uhlmann, E.E.UhlmannSommerfeld, C.C.Sommerfeld2022-03-142022-03-142017https://publica.fraunhofer.de/handle/publica/411201Abrasive brushes are often used for surface finishing and deburring and consist of a brush body with fixed, highly flexible abrasive filaments. During the brushing process the highly flexible abrasive filaments deform tangentially and axially and adapt to the shape of the workpiece. The contact behaviour of abrasive brushes in the machining process is very complex and has been insufficiently investigated so far. To obtain a better understanding of the brushing process, a filament model based on Lagrangian mechanics is presented in this study. The model describes with a differential-algebraic equation system the dynamic behaviour of a single filament in contact with the workpiece. Therefore, the filament is modeled as a discrete system of rigid links which are connected with rotational springs and rotational dampers. A geometrical constraint defines the workpiece surface and includes the effect of friction. Furthermore, material and contact properties of the filament as a composite of a plastic matrix and abrasive grains are determined to solve the corresponding differential-algebraic equations numerically. A comparison of the calculated with experimental determined data shows good agreements.en658670conference paper