Cutting insert having main and secondary chip formers
AssigneeIscar, Ltd.
InventorsMichael Abramson, Eitan Gonen
Life of this patent
Estimating the term…
Abstract
As seen in a side view of a cutting insert, the cutting insert is provided with cutting edges that slope in opposite directions. A rake surface extends at the upper surface inwardly from the cutting edges. An inward portion of the rake surface forms a main chip former. A first end of the rake surface adjacent a raised cutting corner and distal a lower cutting corner is provided with a secondary chip former that extends from adjacent the raised cutting corner to the main chip former.
Claims29
A cutting insert comprising an upper surface, a lower surface defining a lower plane, and a peripheral surface extending between the upper surface and the lower surface,
- the peripheral surface is provided with a first pair of opposing first side surfaces and a second pair of opposing second side surfaces, each of the first side surfaces merges with each of the adjacent second side surfaces at a side edge,
- an intersection of each of the first side surfaces and the upper surface forms a cutting edge, the intersection of each of the side edges and the upper surface forms a cutting corner, each of the cutting edges merges with a lower cutting corner at a first end thereof and with a raised cutting corner at a second end thereof, each of the cutting edges is associated with a rake surface extending inwardly therefrom at the upper surface, the cutting edges slope in opposite directions as seen in a side view of the cutting insert,
- an inward portion of the rake surface distal the cutting edge forms a main chip former having an upper end, each portion of the upper end is distanced from the lower plane by an end distance that is larger than a respective distance from the lower plane to an adjacent cutting edge portion that lies on a line perpendicular to the cutting edge and passing through the associated portion of the upper end, wherein:
- a first end of the rake surface adjacent the raised cutting corner and distal the lower cutting corner is provided with a secondary chip former that extends from adjacent the raised cutting corner to the main chip former.
A cutting insert comprising:
- an upper surface;
- a lower surface defining a lower plane;
- a peripheral surface extending between the upper surface and the lower surface, the peripheral surface being provided with a first pair of opposing first side surfaces and a second pair of opposing second side surfaces, each of the first side surfaces being connected to each of the second side surfaces;
- a cutting edge formed at an intersection of each first side surface and the upper surface, each cutting edge having a raised end and a lowered end, the cutting edges sloping in opposite directions as seen in a side view of the cutting insert;
- a rake surface associated with each cutting edge and extending inwardly therefrom at the upper surface, an inward portion of the rake surface distal a given cutting edge forming a main chip former having an upper end, each portion of the upper end being distanced from the lower plane by an end distance that is larger than a respective distance from the lower plane to an adjacent cutting edge portion that lies on a line perpendicular to said given cutting edge and passing through the associated portion of the upper end;
- and
- a secondary chip former associated with each cutting edge and extending from proximate the raised end of the associated cutting edge to the main chip former, the secondary chip former having an outward end adjacent the raised end of the associated cutting edge and an inward end adjacent the main chip former.
Dependencies are inferred from the claim text.