| CPC B23C 5/202 (2013.01) [B23C 3/13 (2013.01)] | 9 Claims |
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1. A cutting insert, comprising:
a base body comprising
a first surface,
a second surface located on a side opposite to the first surface,
a first lateral surface connecting to the first surface and the second surface,
a second lateral surface connecting to the first surface, the second surface and the first lateral surface,
a first recess opening into the first surface, the first lateral surface and the second lateral surface, and
a second recess opening into the second surface, the first lateral surface and the second lateral surface;
a first part located in the first recess and comprising a first cutting edge located at an intersection of two adjacent surfaces; and
a second part located in the second recess and comprising a second cutting edge located at an intersection of two adjacent surfaces, wherein
the first recess comprises
a first bottom surface located away from the first surface,
a first wall surface located between the first bottom surface and the first surface, and
a first valley line located on an intersection of the first bottom surface and the first wall surface,
the second recess comprises
a second bottom surface located away from the second surface,
a second wall surface located between the second bottom surface and the second surface, and
a second valley line located on an intersection of the second bottom surface and the second wall surface, and
in a transparent plan view of the first surface, the first valley line is different from the second valley line and the first valley line intersects with the second valley line.
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