Cutting insert with scallops
AssigneeKennametal India Limited
InventorSreekala Pacheri
Life of this patent
Estimating the term…
Abstract
A polygonal indexable cutting insert including a pair of faces, a plurality of peripheral side surfaces, a plurality of rounded corners, a plurality of cutting edges formed with an edge radius, a plurality of triangular-shaped areas proximate the rounded corners; and a plurality of chip breaking scallops positioned along the cutting edges. Each scallop has a bottom surface formed by a rake face and an arcuate back wall having a varying depth. The arcuate back wall of each scallop intersects the arcuate back wall of adjacent scallops at a point located at a distance from each cutting edge for providing a wedge effect that facilitates in dividing and breaking chips.
Claims18
A polygonal indexable cutting insert, comprising:
- a pair of faces and a plurality of peripheral side surfaces normal to said parallel faces, said faces and said side surfaces being joined to form rounded corners, each face having a rake face and a central plateau;
- a plurality of cutting edges formed at an intersection between said faces and plurality of side surfaces;
- and
- a plurality of chip breaking scallops positioned along the cutting edges, each scallop comprises a bottom surface formed by the rake face and an arcuate back wall joining said bottom surface and said central plateau to form a chip breaker,
- wherein said central plateau of each face includes a triangular-shaped area proximate the rounded corners, each triangular-shaped area including an apex that lies along a bisector passing through a central axis and opposite rounded corners.
A polygonal indexable cutting insert comprising:
- a pair of faces and a plurality of peripheral side surfaces normal to said parallel faces, said faces and said side surfaces being joined to form rounded corners, each face having a central plateau that includes a triangular-shaped area proximate each rounded corner;
- a plurality of cutting edges formed at an intersection between said faces and plurality of side surfaces, each cutting edge formed with an edge radius;
- a rake face extending inwardly and downwardly at an angle with respect to a plane that is parallel to the pair of faces;
- and
- a plurality of chip breaking scallops positioned along the cutting edges comprising a bottom surface formed by the rake face and an arcuate back wall joining said bottom surface and said central plateau to form a chip breaker,
- wherein a depth of the arcuate back wall of each scallop varies, thereby increasing side curl of the chips and formation of short helical chips.
A polygonal indexable cutting insert, comprising:
- a pair of faces and a plurality of peripheral side surfaces normal to said parallel faces, said faces and said side surfaces being joined to form rounded corners, each face having a central plateau that includes a triangular-shaped area proximate each rounded corner;
- a plurality of cutting edges formed at an intersection between said faces and plurality of side surfaces, each cutting edge formed with an edge radius;
- a rake face extending inwardly and downwardly at an angle with respect to a plane that is parallel to the pair of faces;
- a triangular-shaped area proximate the rounded corners, each triangular-shaped area including an apex that lies along a bisector passing through a central axis and opposite rounded corners;
- and
- a plurality of chip breaking scallops positioned along the cutting edges comprising a bottom surface formed by the rake face and an arcuate back wall joining said bottom surface and said central plateau to form a chip breaker,
- wherein the arcuate back wall of each scallop intersects the arcuate back wall of adjacent scallops at a point located at a distance from each cutting edge for providing a wedge effect that facilitates in dividing and breaking chips, and
- wherein a depth of the arcuate back wall of each scallop is smallest proximate the point and largest between adjacent points, thereby increasing side curl of the chips and formation of short helical chips.
Dependencies are inferred from the claim text.