The invention relates to a tool device in which a profile tool is detachably secured to a toolholder.
Such a tool device, with stops on the toolholder and tool for positioning the cutting profile of the tool relative to the holder, is the subject of EP A-0 132350. The profile tool shown there is annular in construction and comprises teeth at its outer circumference. The toolholder comprises an annular body on which the profile tool is seated and is locked through an annular bush, by means of a nut. In the course of this, the inner edge of the profile tool comes to bear against an annular shoulder of the bush. In order to ensure a precisely centric arrangement of the profile tool on the toolholder, there must be a relatively tight fit between the inner edge of the profile tool and the annular shoulder of the bush, but this is not guaranteed in the case in question because the profile tool in the clamped state is deformed in the shape of the rim of a plate.
In order to ensure accurate positioning of the profile tool in the circumferential direction, the bush has a bore which runs substantially parallel to its axis and extends into the annular body, which bore intersects the inner edge of the profile tool which has a recess at this inner edge. The profile tool is arranged so that this recess is in alignment with the bore in which a pin is then inserted. If the recess at the inner edge of the profile tool is not precisely in alignment with the bore, there is the danger of the recess being deformed when the pin is inserted so that a satisfactory positioning of the profile tool in the circumferential direction is no longer guaranteed.
It is an object of the present invention to provide a simple means for ensuring a reproducible alignment of a profile tool on a toolholder.