Cutting insert with trapezoidal indentations along the cutting edge
AssigneeWidia GmbH
InventorJose Agustin Paya
Life of this patent
Estimating the term…
Abstract
The invention relates to a cutting insert for chip-forming machining, in particular for roughing of metallic work-pieces with a high feed speed. To increase the chip movement during cutting it is suggested that indentations (14) be provided in the region of a cutting edge (12) which are arranged in a row extending along the cutting edge (12), which interrupt same and which have a generally trapezoidal sectional shape parallel to the cutting edge (12) and perpendicular to the chip surface (10) with trapezoidal sides open toward the chip surface, the indentations having a chip-surface base extending at a negative or 0.degree. chip angle (19) to the cutting edge (12), the chip surface (16) in the region between the indentations (14) at the cutting edge (12) has a positive chip angle (17).
Claims20
In a cutting insert for chip-forming machining having
- a chip surface provided at a cutting edge with a plurality of indentations arranged in a row extending along the cutting edge and each having a generally trapezoidal sectional shape parallel to the cutting edge and perpendicular to the chip surface with trapezoidal sides open toward the chip surface, the improvement wherein
- the indentations each have a chip-surface base extending at a substantially negative chip angle to the cutting edge,
- the chip surface has in regions between the indentations at the cutting edge a positive chip angle of at least 5.degree.,
- the indentations extend to and interrupt the cutting edge, and
- transitions from each chip-surface base to the respective trapezoidal sides or from the trapezoidal sides to the respective chip-surface regions between the indentations are rounded to a radius of at least 0.3 mm.
Dependencies are inferred from the claim text.