Regrindable chip controlling insert

Details Regrindable chip controlling insert Regrindable chip controlling insert

B - Operations, Transporting

23

Q

29/32, 29/45

B23Q 3/00 (2006.01) B23B 27/08 (2006.01) B23B 27/14 (2006.01)

Patent

CA 1194283

ABSTRACT A regrindable metal cutting insert (10) having a cutting edge (31) and an associated chip control surface (52) and at least one additional chip control surface (62) diesposed behind the cutting edge (31) and being exposed only when a selected portion of the insert is ground away to form a new cutting edge. Chip configuration control is effected by means of a cutting edge formed with a transverse rake face (52) extending to a top shoulder (64) above and behind the cutting edge (31) and a rearward extending channel (50) that penetrates both the top of the insert (64) and the shelf type cutting edge (31). Additional transverse shelves (62) are formed at spaced apart locations behind the cutting edge (31). When regrinding is necessary, the insert (10) can be ground back to the next rearward disposed shelf (62) forming a new cutting edge with an associated chip control configuration. The rake face (52) associated with a cutting edge (31) of the insert can be coated with a suitable material such as titanium nitride. The insert (10) after grinding will still have a coated rake face associated with the new cutting edge.

393272

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