Back to results
US 5,971,672 AGranted
Milling cutting insert
AssigneeSandvik AB
InventorLars-Ola Hansson
Life of this patent
Estimating the term…
Loading patent…
Loading patent…
AssigneeSandvik AB
InventorLars-Ola Hansson
Estimating the term…
The present invention relates to a milling cutting insert having an upper side, a bottom side, and flank surfaces connecting the upper and bottom sides. At each operative cutting corner there is a projection which is depressed relative to the adjacent main cutting edge and corner cutting edge. At the front upper edge of the projection is the wiper edge that generates the surface on the workpiece. By tipping the cutting insert axially positively and radially negatively, the horizontally located wiper edge may be tipped frontwards into contact with the workpiece, while the vertically located wiper edge is tipped backwardly, so that it does not reach the workpiece. In this way an improved axial clearance is made possible and an undesired groove in the workpiece is avoided, which would otherwise be caused by the vertically located wiper edge.
Milling cutting insert for the chip-breaking machining of an internal, right-angular corner in a workpiece, said cutting insert comprising:
Milling cutter tool for the chip-breaking machining of an internal, right-angular corner in a workpiece, the milling cutter tool being rotatable around a central axis of rotation and including insert seats for accommodating detachable indexable milling cutting inserts, said milling cutter tool comprising at least one milling cutting insert including an upper side, a bottom side, a plurality of flank surfaces connecting said upper and bottom sides, and four corner portions provided between two adjacent said flank surfaces, each of said corner portions including a plurality of corner flank surfaces, said upper side being connected to each said flank surface along a main cutting edge and to each said corner flank surface along a corner cutting edge, each corner portion further including a projection having an upper surface depressed relative to an adjacent said main cutting edge, at least a portion of a front upper edge of said projection forming a wiper edge for generating a generally smooth surface on the workpiece, the wiper edge protruding outwards from a substantially vertical plane of the adjacent said main cutting edge.
Dependencies are inferred from the claim text.