Cutting insert and cutting tool, and method for producing cut workpieces using cutting tool

A cutting insert comprising:

• an insert body comprising
• a polygonal-shaped top surface including a corner section, and a first side and a second side each adjacent to the corner section,
• a polygonal-shaped bottom surface corresponding to the top surface, and
• side surfaces positioned between the top surface and the bottom surface;
• a cutting edge positioned at an intersection between the top surface and the side surfaces, the cutting edge comprising
• a corner cutting edge positioned at the corner section,
• a first cutting edge positioned on the first side, and
• a second cutting edge positioned on the second side;
• a rake face positioned along the cutting edge on the top surface, the rake face sloping downward away from the cutting edge;
• and
• a first raised part positioned inside the rake face on the top surface and rising upward;
• wherein
• the first raised part comprises a protruding section positioned so as to include a bisecting line of the corner section, protruding toward the corner cutting edge, and having a width in a direction orthogonal to the bisecting line that decreases toward the corner cutting edge when viewed from above;
• and
• the cutting insert further comprises a second raised part positioned on a tip side of the protruding section,
• the second raised part comprises
• a first end located in a side of the first cutting edge;
• and
• a second end located in a side of the second cutting edge,
• the second raised part extends toward the first end and the second end from the protruding section,
• the second raised part comprises a convex curved shape in which, when viewed from above, an outer peripheral edge on the corner section side forms a protuberance extending toward the corner section,
• the first end, when compared to other locations of the second raised part adjacent to the first cutting edge, is both furthest away from the corner section and closest to the first cutting edge, and
• the second end, when compared to other locations of the second raised part adjacent to the second cutting edge, is both furthest away from the corner section and closest to the second cutting edge,
• wherein, when a reference plane is provided so as to intersect a central axis that connects a center of the top surface and a center of the bottom surface and to be positioned downward from the top surface,
• the second raised part has a height from the reference plane of the first end and the second end that is greater than a height from the reference plane in a middle portion positioned on the bisecting line.