A hobbing cutter with a hob body which circumferentially has at least one helically shaped flight or a plurality of annular flights, including flanks on either side of a flight apex, wherein the flanks have alternately mounted thereon indexable inserts by means of screws and the indexable inserts extend into the flight apex, wherein the cutting edges of adjoining hobbing flights further are at a twisted offset from a line which runs in parallel with the axis of the hob body, and wherein the indexable inserts have associated therewith radially outwardly open chutes which transversely extend through the flight apex, wherein the cutting edges of the indexable inserts of adjoining flights are disposed at such an offset from each other that a straight shank of a screwdriver can be passed through a close-to-apex portion of the chutes in order to be engaged with a mounting bolt of an indexable insert on the adjoining flight.
Description
BRIEF DESCRIPTION OF THE SEVERAL VIEWS OF THE DRAWINGS
An embodiment of the invention will be explained below with reference to the drawings.
FIG. 1 shows a developed portion of a hobbing cutter of the invention.
FIG. 2 shows a side view of a hobbing cutter of the invention and the use of a screwdriver.
Claims
1. A hobbing cutter with a hob body which circumferentially has at least one helically shaped flight or a plurality of annular flights, including flanks on either side of a flight apex, wherein the flanks have alternately mounted thereon indexable inserts by means of screws and the indexable inserts extend into the flight apex, wherein the cutting edges of adjoining hobbing flights further are at a twisted offset from a line which runs in parallel with the axis of the hob body, and wherein the indexable inserts have associated therewith radially outwardly open chutes which transversely extend through the flight apex, characterized in that the cutting edges of the indexable inserts (16, 18) of adjoining flights (12) are disposed at such an offset from each other that a straight shank (26) of a screwdriver (24, 30) can be passed through a close-to-apex portion of the chutes (22) in order to be engaged with a mounting bolt (20) of an indexable insert (16, 18) on the adjoining flight (12).
2. The hobbing cutter according to claim 1, characterized in that a basic body has provided thereon a plurality of identical toothed segments helically disposed in succession which are attached to the basic body by means of screws (14).
3. The hobbing cutter according to claim 1, characterized in that the hob body has juxtaposed discs with flanks and an apex.
4. The hobbing cutter according to claim 1, characterized in that the cutting edges of the indexable inserts (16, 18) of adjoining flights (12) are disposed at an offset of half a pitch T/2 from each other.
Patent Application
20070172316
