Swiss turning insert with chip former arrangement comprising upwardly extending ridge

A swiss insert comprising:

• opposite insert first and second side surfaces;
• opposite insert upper and lower surfaces connecting the insert first and second side surfaces;
• opposite insert front and rear surfaces connecting the insert upper and lower surfaces and the insert first and second side surfaces;
• a first corner formed at an intersection of the first and second side surfaces and the insert upper and front surfaces;
• a second corner formed at an intersection of the first and second side surfaces and the insert upper and rear surfaces;
• a third corner formed at an intersection of the first and second side surfaces and the insert lower and front surfaces;
• a fourth corner formed at an intersection of the first and second side surfaces and the insert lower and rear surfaces;
• a screw hole opening out to the insert first and second side surfaces;
• an insert thickness axis (AT) extending perpendicular to, and extending through, the insert first and second side surfaces;
• an insert height axis (AH) extending perpendicular to the insert thickness axis, and extending through the insert upper and lower surfaces;
• an insert length axis (AL) extending orthogonal to the insert thickness and height axes, and extending through the insert front and rear surfaces;
• a length plane (PL) defined by the insert length axis (AL) and the insert height axis (AH);
• a thickness plane (PT) defined by the insert thickness axis (AT) and the insert length axis (AL);
• a height plane (PH) defined by the insert height axis (AH) and the insert thickness axis (AT);
• a maximum insert thickness measurable along the insert thickness axis;
• a maximum insert height measurable along the insert height axis and being greater than the maximum insert thickness;
• a maximum insert length measurable along the insert length axis and being greater than the maximum insert height;
• the insert height axis (AH) defining an upward direction (DU) from the center of the insert towards the insert upper surface, and defining a downward direction (DD) opposite to the upward direction;
• the insert thickness axis (AT) defining a first side direction (DS1) from the center of the insert towards the insert first side surface, and defining a second side direction (DS2) opposite to the first side direction;
• the insert length axis (AL) defining a forward direction (DF) from the center of the insert towards the insert front surface, and defining a rearward direction (DR) opposite to the forward direction;
• the first corner comprising:
• a cutting edge, and
• a chip former arrangement formed at the upper surface;
• the cutting edge comprising:
• a first sub-edge extending along an intersection of the upper surface and the first side surface and following a straight line in a view along the second side direction (DS2);
• a second sub-edge extending along an intersection of the upper surface and the second side surface and following a straight line in a view along the first side direction (DS1);
• a third sub-edge extending along an intersection of the upper surface and the front surface;
• a first corner edge connecting the first sub-edge the third sub-edge;
• and
• a second corner edge connecting the second sub-edge the third sub-edge;
• the chip former arrangement comprising:
• a first chip surface adjacent to the first sub-edge and extending from the third sub-edge to a first rear chip edge, thereby defining a first cutting depth (LC1);
• a second chip surface adjacent to the first sub-edge and extending from the third sub-edge to a second rear chip edge, thereby defining a second cutting depth (LC2);
• a general cutting depth (LGC) of the chip former arrangement being defined as (i) the smaller of the first and second cutting depths (LC1, LC2), or (ii) if the first and second cutting depths are equal, the depth of both the first and second cutting depths (LC1, LC2);
• and
• a ridge connected to the first and second chip surfaces, and comprising a ridge front end proximate to the third sub-edge and a ridge rear end located further than the ridge front end from the third sub-edge, the ridge extending in the upward direction from the location of the upper surface where the ridge and the first and second chip surfaces connect;
• wherein adjacent to the cutting edge the insert's first and second side surfaces and front surface are configured as relief surfaces by:
• the first side surface tapering in a combined downward and second side direction;
• the second side surface tapering in a combined downward and first side direction;
• and
• the front surface tapering in a combined downward and rearward direction.