Metal cutting insert with rounded cutting edge
AssigneeSandvik AB
InventorLars Lindstedt
Life of this patent
Estimating the term…
Abstract
An insert for metal turning and grooving has an annular cutting edge. A chipformer surface is disposed radially inside of the cutting edge. A chip breaking wall is disposed radially inside of the chipformer surface. The chip breaking wall is inclined upwardly. A first section of the chip breaking wall located adjacent a front end of the insert has a steeper inclination than a second section thereof spaced circumferentially from the first section in a direction toward the rear end of the insert. The inclination of the chip breaking wall varies progressively from the first section to the second section.
Claims7
A cutting insert for turning and grooving tools, comprising:
- upper and lower front-to-rear extending surfaces,
- two oppositely disposed side surfaces interconnecting said upper and lower front-to-rear extending surfaces, and
- front and rear end surfaces each intersecting said upper and lower front-to-rear extending surfaces and said side surfaces,
- a front portion of said upper front-to-rear extending surface including
- a generally annularly extending cutting edge for cutting a chip having a varying thickness along the cut depth, wherein the chip has a smaller thickness adjacent a forward end of said front portion than adjacent a location spaced circumferentially from said forward end in a direction toward said rear end surface,
- a chipforming surface disposed radially inside of said cutting edge, and
- a chip breaking rear wall disposed radially inside of said chipforming surface, and extending upwardly therefrom,
- a first section of said rear wall disposed adjacent said forward end of said front portion having a steeper upward inclination than a second section of said rear wall, disposed adjacent said location so that said first section acts on a smaller chip thickness than does said second section.
Dependencies are inferred from the claim text.