Face miller and use thereof
The face miller is equipped with a plurality of plate-shaped hard material cutting inserts that are distributed over the circumference. The hard material cutting inserts are located on a graduated circle in pockets of a blade carrier and have a main cutting edge, which is adjusted at a cutting edge angle smaller than 90° relative to the working plane of the miller. In order to ensure maximum machining performance at a good service life, the cutting edge angle is selected to range between 10° and 30°, wherein the main cutting edge at the same time has a slightly convex design. The main cutting edge transitions into the secondary cutting edge via a transition radius having a value that ranges between 0.5 and 1.5 mm. The axial rake angle ranges between 20 and 30°. According to an advantageous further development, the radial rake angle ranges between −6° and −10°.
1. A face miller comprising:
a plurality of plate-shaped hard-material cutting inserts which are distributed over a circumference of the face miller, and which are accommodated on a reference circle lying in compartments of a cutter carrier, each cutting insert having a main cutting edge and a corresponding auxiliary cutting edge,
each main cutting edge positioned at a setting angle K r , which is smaller than 90° relative to an operating plane of the miller,
the setting angle K r lying in the range between 10° and 30°,
each main cutting edge constructed in a slightly convex manner,
each main cutting edge merging into each corresponding auxiliary cutting edge via a small transition radius with a value in the range between 0.5 and 1.5 mm, and
each main cutting edge having an axial milling angle γ a lying in the range between 20 and 30°, and
each main cutting edge being longer than the corresponding auxiliary cutting edge.
2. The face miller according to claim 1 , wherein the main cutting edge essentially follows a radius, which lies in the range between 80 and 120 mm.
3. The face miller according to claim 1 , wherein each main cutting edge comprises a radial milling angle γ r , each radial milling angle γ r lying in the range between −6 and −10°
4. The face miller according to claim 1 , wherein each cutting insert comprises a clearance angle α, each clearance angle α lying in the range between 8 and 12°.
5. The face miller according to claim 1 , wherein each hard-material cutting insert has a cutting plate made from polycrystalline diamond or cubic boron nitride encompassing the main cutting edge at least, wherein a thickness of the cutting plate lies in the range from 0.4 to 0.6 mm.
6. The face miller according to claim 5 , wherein each cutting plate is fastened on a cutter carrier plate, the material of which is selected from among steel, hard-metal, aluminium, carbon-fibre-reinforced, and glass-fibre-reinforced materials.
7. The face miller according to claim 6 , wherein each cutting plate is adhesively bonded or soldered to a respective one of the cutter carrierplates.
8. The face miller according to claim 1 , wherein each hard-material cutting insert is soldered, clamped, or adhesively bonded to a respective one of the compartments of the cutter carrier.
9. The face miller according to claim 1 , wherein the hard-material cutting inserts are arranged with irregular circumferential spacing with respect to one another.
10. The face miller according to claim 1 , wherein each hard-material cutting insert is provided with a wear-reducing coating at least in certain sections.
11. The face miller according to claim 1 , wherein the face miller comprises internal coolant channels which have outlet openings directed onto the main cutting edges.
12. A method comprising contacting a face miller according to claim 1 with an aluminium material.
13. A method comprising operating a face miller according to claim 1 at a cutting speed of up to 4000 m/min.