Analysis of Filament Deformation for a Freely Rotating Cup Brush

Abstract

In this paper, a mechanics formulation is outlined and used for evaluating the steady-state, large deflection of a slender member subjected to displacement-dependent centrifugal load. The problem is examined within the context of rotating filamentary cup brushes that are used in surface finishing operations. Several parameters which are closely related to the machining performance and service life of cup brushes are identified and reported, including filament tip spatial distribution and orientation, filament stress, and the steady-state configuration of the working surface of the cup brush during free rotation. Numerical results indicate that filament inertia forces can lead to significant fiber displacement and stress and thus, must be included as an integral part of the design of rotary cup brushes.

Effectiveness of gutter brushes in removing street sweeping waste

“…Likewise, the amount of literature on brushing processes is very limited. Research has been conducted into the behaviour of brushes for surface finishing operations Shia et al, 1989;Heinrich et al, 1991;Stango and Shia, 1997;Fitzpatrick and Paul, 1987), removal of fouling from surfaces (Holm et al, 2003), post-CMP (Chemical Mechanical Planarization) cleaning (Philipossian and Mustapha, 2003;Moumen and Busnaina, 2001), air duct cleaning (e.g., Holopainen and Salonen, 2002), and street sweeping (Wang, 2005;Peel and Parker, 2002;Peel, 2002;Vanegas Useche et al, 2007Abdel Wahab et al, 2007). Relevant details of research into street sweeping and brushing technology are discussed in this section.…”

Characterization of surface polishing with spindle mounted abrasive disk-type filament tool for manufacturing of machine tool sliding guideways

“…In another study, Stango and Shia showed that the bristles on disk-type tools can undergo a significant transverse deflection which is brought about by centrifugal loads generated during free rotation [10]. This deformation of the bristles results in non-uniform bristle/workpiece contact and contributes to uneven material removal rates within the contact zone.…”

“…This deformation of the bristles results in non-uniform bristle/workpiece contact and contributes to uneven material removal rates within the contact zone. Stango and Shia developed a discretized numerical model based on the mechanics of cantilever beams and bristle spacing and performed a parametric study of the total percentage of filaments in contact with the workpiece as a function of normalized penetration depth for various non-dimensional tool speeds [10]. It was found that the magnitude of the deflection was highly dependent on the rotation speed and stiffness of the bristles and could be accurately predicted for both small and large displacements.…”

“…It has been noted by the authors of several studies that there is still a great deal of uncertainty regarding the material removal mechanics of filament tools, so much so, that it has been suggested that trial-and-error experimentation is often necessary before the application of the tool can be implemented in a production environment [9][10][11]. For these reasons, further investigation is needed to determine how process parameters influence the performance of this tool when modifying the surface of hardened cast iron for the application of sliding guideways.…”

Numerical Analysis of Tilted Cutting and F128 Brushes

“…Similarly, research has also been conducted on other types of brushes; however, this research is also limited. Fitzpatrick et al [Fitzpatrick and Paul (1987); Shia, Stango and Heinrich (1989); Stango, Heinrich and Shia (1989); Stango, Cariapa, Prasad et al (1991); Heinrich, Stango and Shia (1991); Stango and Shia (1997)] have studied the behaviour or performance of brushes for surface finishing operations. Holm et al [Holm, Haslbeck and Horinek (2003)] have studied brushes for surface fouling removal.…”