Walter Ag

Wolfgang Votsch

Siegfried Bohnet

Thomas Schneider

Lothar Fauser

Hans Peter Durr

A milling tool (1) has at least one insert seat (14) which is adjustable in the axial direction. Provided for this purpose as an insert seat is a cartridge (47) which is received in a groove (41) but does not have a supporting face for the bottom face of the insert (25). The insert (25) consequently rests on a side wall (42) of the groove (41). As a result, the insert seat (14) is formed by a combination of the plane face of the tool body (2) and bearing faces (51, 52) of the cartridge (47). This achieves a particularly small installation space (close tooth spacing) and rigid mounting of the insert (25).

Milling tool with axial adjustment

To facilitate manufacture and stocking of inserts for the ball end of a ball milling cutter, identical asymmetrical cutting inserts which are of generally pointed, elongated leaf shape, define two end points or tips, with two cutting edges opposite a theoretical straight line connecting the tips. The cutting edges (14, 15) each have at least one curved portion (24, 26) and an adjoining elongated, roughly straight portion (23, 25). The lengths of the respective curved portions and straight portions on the two cutting edges are different, and the edges and their respective lengths and positions with respect to an attachment hole (17) are so arranged that the first cutting edge of one insert on one side cuts on a ball surface which extends at least up to approximately the center line of the milling tool, and the straight cutting edge merges into a cylindrical surface. The curved portion (26) of the other cutting edge (15) of a second, identical insert completes the ball cutting surface and also merges into a cylindrical surface, so that, in operation, one longer and one shorter curved portion, respectively, on both inserts are actively cutting. When the cutting edges are worn, the inserts are interchanged on the respective plate seats of the milling cutter so that the previously inactive shorter or longer curved edge, cut at the end surface.

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Rangendingen, Germany

Wolfgang Votsch