Tool and cutting insert for internal cooling, and method of manufacturing thereof

A cutting insert, comprising:

• a top surface;
• a bottom surface;
• a side surface between the top surface and the bottom surface;
• a cutting edge defined at a portion of said top and side surfaces;
• and
• a cavity formed therein, said cavity having an opening formed in said bottom surface and converging upwardly toward a top end thereof disposed adjacent to said cutting edge, said side surface and said top end of the cavity defining a thin-walled structure therebetween, the cutting insert further comprising one or more auxiliary discharge apertures spanning between said top end of the cavity and said side surface.

A cutting insert, comprising:

• a top surface;
• a bottom surface;
• a side surface between the top surface and the bottom surface;
• and
• a cutting edge defined at a portion of said top and side surfaces;
• a cavity formed therein, an internal surface of the cavity comprising a front interior surface adjacent said side surface and a rear interior surface, said front and rear interior surfaces spanning between an opening formed in said bottom surface and converging upwardly toward a top end of the internal surface being disposed adjacent to said cutting edge, said side surface and said top end of the cavity defining a thin-walled structure therebetween;
• and
• one or more ribs projecting into the cavity from its top end;
• at least some of said ribs being characterized by side faces forming a cuspated edge at a first part of a distal portion thereof being closer to said rear interior surface, and being spaced from one another and having a bottom-facing surface at a second part of a distal portion thereof being closer to said front interior surface.