Vorrichtung, insbesondere Oberfräse zur spanabhebenden Bearbeitung eines Werkstückes

摘要

A device for cutting a workpiece by means of a rotatingly driven tool bit has a suction hood surrounding the tool bit in annular manner with a through-opening (21) for the workpiece to pass through. The suction hood (20) forms a suction duct (23) open to the tool bit which is limited by an outer wall (26). At least a part of the outer wall is curved in a perpendicular plane in the form of a parabola, and the focal point (27) of the parabola lies beneath the workpiece engagement surface formed by the suction hood. Because of this parabola shape, chips thrown by the tool bit against the outer wall are reflected essentially parallel to the workpiece engagement surface and thus do not escape up through the through-opening. $$