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US 2003/0156909 A1Published application
Cutting insert
AssigneeManchester Tool Company
InventorNelson Pao Chung Tong
Life of this patent
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AssigneeManchester Tool Company
InventorNelson Pao Chung Tong
Estimating the term…
A metal cutting insert having a pair of cutting portions disposed on either side of a shank portion. Structure is formed on the metal cutting insert by which the insert is clamped to a tool holder which positions one of the cutting portions in a machining position. Each cutting portion includes a forward cutting edge and two side cutting edges. Each side cutting edge forms part of a shelf that includes chip controlling/breaking structure. Each side cutting edge is defined by the juncture of a cutting surface with an upper boundary of a side face and the chip controlling structure includes a chip deflecting surface located adjacent the side cutting surface that includes a plurality of concave recesses that generate localized stiffening of a chip as it moves along the chip deflecting surface. The forward cutting edge performs cutting operations on a rotating workpiece in a radial direction. Chip controlling structure located adjacent the forward cutting edge includes a downwardly sloping surface that forms part of a channel which extends from the forward cutting edge towards a shank portion of the insert. A pair of ridges located on either side of the channel rise upwardly and reach a height that is above the plane of the forward cutting edge. The width of the channel decreases in width for a portion of its extent. The ridges support and deflect a chip created by the forward cutting edge and generate localized stiffening of the chip in the region of the chip that is unsupported by the ridges. Radiused corner surfaces are provided which are especially effective as chip controlling surfaces during shallow turning operations.
A metal cutting insert having a forward face and spaced apart side faces, an upper boundary of said forward face joining a forward cutting surface, the juncture of the forward cutting surface and said forward face defining a forward cutting edge, each of said side faces having an upper boundary joining a side cutting surface the juncture of a side face and an associated side face upper boundary defining a side cutting edge, each side cutting edge forming part of a shelf that includes a chip controlling structure including a chip deflecting surface positioned immediately adjacent said cutting surface, the width of said chip deflecting surface increasing in a direction away from said front cutting edge and said chip controlling structure including a plurality of recesses spaced along said chip deflecting surface, with each recess increasing in size in a direction away from said forward cutting edge.
A metal cutting insert having a forward face and at least one side face, an upper boundary of said forward face joining a forward cutting surface, the juncture of the forward cutting surface and said forward face defining a forward cutting edge, said side face having an upper boundary joining a side cutting surface the juncture of said side cutting surface and said side face upper boundary defining a side cutting edge, said side cutting edge forming part of a shelf that includes chip controlling structure including a chip deflecting surface positioned immediately adjacent said cutting surface, the width of said chip deflecting surface increasing in a direction away from said front cutting edge and said chip controlling structure including a plurality of recesses spaced along said chip deflecting surface, with each recess increasing in size in a direction away from said forward cutting edge.
A metal cutting insert comprising:
Dependencies are inferred from the claim text.