ROTARY ABRASIVE BRUSH FOR DEBURRING AND METHOD OF MANUFACTURING

摘要

A rotary tool containing a core hub with helical groove on its outer surface filled in with continuous abrasive filament formed by folding of a pre-cut abrasive sheet including multiple bristle like straps extending radially from the hub. The method of manufacturing includes the steps of providing a hub, and forming a helical groove with inverted V-shaped cross-section along its cylindrical surface. An abrasive element is wound around the hub so that the folded edge is fed in the V-grove and is buckled inside the groove providing, along with securing it by sufficient pre-tension of the abrasive element, a secure anchoring of the abrasive element through locking of the buckled edge. The abrasive filament is formed from a roll of abrasive cloth as one continuous piece using a cutting operation and is provided with center-line perforations. These perforations assist folding the filament by providing it with discrete and desired flexibility as well as weakening it in such way that it assists the process of folded edge buckling inside the groove during winding and therefore forms a tight anchoring junction with the hub without need for an adhesive.

主权项

1. An abrasive tool, comprising:
a rotatable body having a helical groove formed within its outer surface; a continuous abrasive filament having a plurality of abrasive straps extending outwardly and integral with said filament having a fold center line in said filament, said filament being positioned within said groove by its folded edge, the ends of said filament being secured in said body.