| 摘要 |
The present invention relates to tools for the machining of solid materials, namely an improved end-mill particularly suited for use in an orbital mode in the milling of recesses The orbital milling tool (10) for cutting openings (12) in a solid material, wherein the openings (12) include normal cylindrical through holes, blind holes, holes including recesses, screw threaded holes, tapered holes and double tapered holes, said tool (10) having a shank portion (16) adjoining a cutting portion (18), the axis of the cutting portion being spaced apart from the spindle axis of a machine tool in which the shank is to be held The cutting portion (18) having a plurality of roughing cutting edges (20,22), a plurality of semi-finishing edges (24,26) axially spaced apart by means of a first transition section from the roughing cutting edges (20,22) and a plurality of finishing edges (28,30) axially spaced apart by means of a second transition section from the semi-finishing cutting edges The maximum diameter of the semi-finishing edges being larger than said roughing cutting edges and smaller than the finishing edges |
