Insert clamping wedge and insert-detachable type cutter

An insert clamping wedge for clamp-fixing a cutting insert formed in a flat plate shape having a rake face and a seat surface, seated in an insert attachment seat formed in a cutter body, to a recessed portion formed in the insert attachment seat, the insert clamping wedge comprising:

• a wedge body;
• wherein the insert clamping wedge is pressed into the cutter body,
• wherein the wedge body includes a clamp surface which comes into close contact with the cutting insert and a wedge surface having a gap between itself and the clamp surface that becomes smaller in a press-insertion direction of the wedge body,
• wherein the clamp surface includes a protrusion accommodated in a hole formed in the rake face of the cutting insert so as to maintain an engagement between the protrusion and the hole, and
• wherein the protrusion has a shape such that a corner change operation can be carried out by allowing the cutting insert to be rotatable about the protrusion, when the insert clamping wedge and the cutting insert are drawn out to a rear side in a press-insertion direction in a range that the engagement between the protrusion and the hole so as to prevent dropping of the insert clamping wedge and the cutting insert from the cutter body.