Throw-away tip
AssigneeMitsubishi Materials Corporation
InventorHiroyasu Shimizu
Life of this patent
Estimating the term…
Abstract
A throw-away tip comprises a tip body with a rake face and a flank face; a generally plane chamfered surface formed at and along a cutting-edge-forming ridge where the rake face and the flank face cross each other; and a phantom radius surface formed at a crossing ridge between the chamfered surface and the flank face, the phantom radius surface being constituted, as in section perpendicular to the cutting-edge-forming ridge, by a plurality of lines connected to one another to provide a generally convex shape. A throw-away tip is provided which has an improved wear resistance and a tough cutting edge, prevents occurrence of fins, and enables suppression of chipping and breaking.
Claims8
A throw-away tip comprising:
- a tip body with a rake face and a flank face;
- a generally plane chamfered surface formed at and along a cutting-edge-forming ridge where said rake face and said flank face cross each other;
- and
- a phantom radius surface formed at a crossing ridge between said chamfered surface and said flank face, said phantom radius surface being constituted, in cross section perpendicular to said cutting-edge-forming ridge, by a plurality of straight lines connected to one another to provide a generally convex shape, wherein a radius of an arc approximated to said plurality of lines connected in a generally convex shape.
A throw-away tip comprising:
- a tip body with a rake face and a flank face;
- a generally plane chamfered surface formed at and along a cutting-edge-forming ridge where said rake face and said flank face cross each other;
- and
- a phantom radius surface formed at a crossing ridge between said chamfered surface and said flank face, said phantom radius surface being constituted, in cross section perpendicular to said cutting-edge-forming ridge, by a plurality of lines connected to one another to provide a generally convex shape, wherein a radius of an arc approximated to said plurality of lines connected in a generally convex shape as in the section perpendicular to the cutting-edge-forming ridge, is in the range of from 0.02 to 0.07 mm and said phantom radius surface is constituted, in the section perpendicular to the cutting-edge-forming ridge, by a plurality of straight lines, neighboring ones of which cross each other in a convex manner.
Dependencies are inferred from the claim text.