Cutting insert for chip forming machining

Details Cutting insert for chip forming machining Cutting insert for chip forming machining

1990-06-12

1991-12-24

Schwartz, Larry I.

Cutters, for shaping

Including tool having plural alternatively usable cutting edges

With integral chip breaker, guide or deflector

407116, B23B 2722

Patent

active

050747207

ABSTRACT:
A cutting insert for chip forming machining of metal workpieces, especially for milling, has an upper face, a lower face and edge faces intersecting the upper face to form cutting edges. A chip upsetting face extends inwardly from the cutting edge and a concavely curved chip face extends inwardly from the chip upsetting face to form a transition edge therewith. The upper face is provided with a number of depressions which are spaced apart along the transition edge. The depressions intersect the transition edge and extend inwardly therefrom. The depression extend non-perpendicularly relative to the cutting edge to form an acute angle with a line perpendicular to the cutting edge. The acute angle is in the range of 5 to 45 degrees. During a cutting action in the depressions cause runners to be formed on the chip bottom, and the runners tend to climb up the sides of the depressions.

REFERENCES:
patent: 3973308 (1976-08-01), Lundgren
patent: 4273480 (1981-06-01), Shirai et al.
patent: 4479744 (1984-10-01), Stricker
patent: 4710069 (1987-12-01), Loqvist
patent: 4776733 (1988-10-01), Pettersson
patent: 4880338 (1989-11-01), Stashko
patent: 4988242 (1991-01-01), Pettersson et al.

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