Cutting Insert, Cutting Tool Using The Same, and Cutting Method
AssigneeKYOCERA Corporation
InventorKaoru Hatta
Life of this patent
Estimating the term…
Abstract
A cutting edge is formed at a ridge between an upper surface and a side surface. In the side surface, a plurality of grooves are formed so as to extend from the side surface to the upper surface to divide the cutting edge, and the clearance angles within these grooves are formed so as to increase from one end of the cutting edge toward the other end of the cutting edge. This achieves a cutting insert having small cutting force and excellent cutting performance. Among the plurality of grooves, the groove nearest to the one end of the cutting edge has preferably a width increasing from the upper surface of the cutting insert toward the lower surface.
Claims18
A cutting insert comprising a cutting edge formed at a ridge between an upper surface and a side surface, wherein
- the side surface has a plurality of grooves extending from the side surface to the upper surface to divide the cutting edge, and
- a clearance angle within each of the grooves increases from one end of the cutting edge toward the other end of the cutting edge.
A cutting insert comprising:
- an insert main body having an upper surface and a plurality of side surfaces;
- a cutting edge located between both ends of a ridge which is between at least one side surface among the side surfaces and the upper surface;
- a high-positioned portion located at one end of the ridge;
- and
- a low-positioned portion located lower in a thickness direction of the insert main body than the high-positioned portion, and located at the other end of the ridge, wherein
- a plurality of grooves extends from at least one side surface to the upper surface to divide the cutting edge by the grooves, and
- in the plurality of grooves, the clearance angle within the groove nearest to the low-positioned portion is greater than the clearance angle within the groove nearest to the high-positioned portion.
A cutting insert comprising:
- an insert main body having an upper surface and a plurality of side surfaces;
- a cutting edge located between both ends of a ridge which is between at least one side surface among the side surfaces and the upper surface;
- a high-positioned portion located at one end of the ridge;
- and
- a low-positioned portion located lower in a thickness direction of the insert main body than the high-positioned portion, and located at the other end of the ridge, wherein
- the cutting edge comprises:
- a first flat cutting edge having substantially the same height as the high-positioned portion;
- a second flat cutting edge having substantially the same height as the low-positioned portion;
- and
- a tilted cutting edge having a height decreasing from the high-positioned portion toward the low-positioned portion, and located between the first flat cutting edge and the second flat cutting edge,
- a plurality of grooves extends from at least one side surface to the upper surface to divide the cutting edge by the grooves,
- the side surface comprises:
- a first flank connecting to the first flat cutting edge;
- a second flank connecting to the tilted cutting edge;
- and
- a third flank connecting to the second flat cutting edge, and
- “a”, “b” and “c” satisfy the relationship of a<b<c, wherein “a” represents the clearance angle within the groove formed at the first flank, “b” represents the clearance angle within the groove formed at the second flank, and “c” represents the clearance angle within the groove formed at the third flank.
Dependencies are inferred from the claim text.