Cutting insert and cutting tool
AssigneeTungaloy Corporation
InventorYuki Oikawa
Life of this patent
Estimating the term…
Abstract
A cutting insert has an upper surface (21), a lower surface (91) and a side surface (61) that connects the two surfaces. A cutting edge is formed at an intersecting edge between the upper surface (21) and the side surface (61). The cutting edge includes at least a major cutting edge (33), a corner edge (34) connected to the major cutting edge (33), and a curved wiper edge (35) located on the opposite side of the major cutting edge (33) across the corner edge (34). A first angle θ made by the major cutting edge (33) and the chord of the wiper edge (35) is 155°≤θ<180°, and a positive land is formed in the wiper edge (35). The cutting edge may further include an inner cutting edge (36) located on an opposite side of the corner edge (34) across the wiper edge (35).
Claims17
A cutting insert (10) comprising an upper surface (21), a lower surface (91), and a side surface (61) that connects the upper surface (21) and the lower surface (91), wherein:
- a cutting edge is formed at an intersecting edge between the upper surface (21) and the side surface (61);
- the cutting edge is at least comprised of a major cutting edge (33), a corner edge (34) connected to the major cutting edge (33), and an outwardly-curved wiper edge (35) located on an opposite side to the major cutting edge (33) with respect to the corner edge (34);
- an angle θ made by the major cutting edge (33) and a chord of the wiper edge (35) is 155°≤θ<180°;
- and
- a land (41) is formed in the wiper edge (35), the land (41) being a positive land.
A cutting insert (10) comprising an upper surface (21), a lower surface (91), and a side surface (61) that connects the upper surface (21) and the lower surface (91), wherein:
- a cutting edge is formed at an intersecting edge between the upper surface (21) and the side surface (61);
- the cutting edge is at least comprised of a major cutting edge (33), a corner edge (34) connected to the major cutting edge (33), and a linear wiper edge (35) located on an opposite side to the major cutting edge (33) with respect to the corner edge (34);
- an angle θ made by the major cutting edge (33) and the wiper edge (35) is 155°≤θ<180°;
- a land (41) is formed in the wiper edge (35), the land (41) being a positive land;
- and
- the cutting edge further comprises an inner cutting edge (36), the inner cutting edge (36) being located on an opposite side to the corner edge (34) with respect to the wiper edge (35).
Dependencies are inferred from the claim text.