Insert attachment mechanism, rotary cutting tool, tool body, wedge member and adjustment member

An insert attachment mechanism (100) for detachably attaching a cutting insert (2) to an insert attachment part (21) of a tool body (3), the insert attachment mechanism comprising:

• a first adjustment member (30) arranged on an inner side of the cutting insert in the insert attachment part to act on the cutting insert, in which a first screw member (40) is screwed into at least one threaded hole formed in at least one of the first adjustment member (30) and the insert attachment part (21), the first adjustment member (30) being advanceable and retractable in a direction of a central axis of the first screw member (40) by rotating the first screw member (40);
• and
• a wedge member (10) arranged together with the cutting insert on an outer side of the first adjustment member (30) in the insert attachment part, the wedge member (10) being attached so as to exert a pressing force against the cutting insert and an inner wall surface of the insert attachment part by a wedge attachment member (20),
• wherein the wedge member (10) is configured such that the first screw member (40) is accessible from an outer side of the wedge member (10), and
• wherein the first screw member (40) includes two screw parts having different winding directions, one of the two screw parts being screwed into a threaded hole formed in the first adjustment member (30) and the other one of the screw parts being screwed into a threaded hole formed in the insert attachment part (21).

An insert attachment mechanism (100) for detachably attaching a cutting insert (2) to an insert attachment part (21) of a tool body (3), the insert attachment mechanism comprising:

• a first adjustment member (30) arranged on an inner side of the cutting insert in the insert attachment part to act on the cutting insert, in which a first screw member (40) is screwed into at least one threaded hole formed in at least one of the first adjustment member (30) and the insert attachment part (21), the first adjustment member (30) being advanceable and retractable in a direction of a central axis of the first screw member (40) by rotating the first screw member (40);
• and
• a wedge member (10) arranged together with the cutting insert on an outer side of the first adjustment member (30) in the insert attachment part, the wedge member (10) being attached so as to exert a pressing force against the cutting insert and an inner wall surface of the insert attachment part by a wedge attachment member (20),
• wherein the wedge member (10) is configured such that the first screw member (40) is accessible from an outer side of the wedge member (10), and
• wherein the first adjustment member (30) has a first engagement part (31) that is engageable with a second engagement part (51) provided on the insert attachment part so as to guide a movement of the first adjustment member in the direction of the central axis of the first screw member (40).

A cutting tool (1) comprising:

• a tool body (3) having an insert attachment mechanism for detachably attaching a cutting insert (2) to an insert attachment part (21) of the tool body (3);
• and
• the cutting insert detachably attached to the tool body (3) by the insert attachment mechanism,
• wherein the insert attachment mechanism comprises:
• a first adjustment member (30) arranged on an inner side of the cutting insert in the insert attachment part to act on the cutting insert, in which a first screw member (40) is screwed into at least one threaded hole formed in at least one of the first adjustment member (30) and the insert attachment part (21), the first adjustment member (30) being advanceable and retractable in a direction of a central axis of the first screw member (40) by rotating the first screw member (40);
• and
• a wedge member (10) arranged together with the cutting insert on an outer side of the first adjustment member (30) in the insert attachment part, the wedge member (10) being attached so as to exert a pressing force against the cutting insert and an inner wall surface of the insert attachment part by a wedge attachment member (20),
• wherein the wedge member (10) is configured such that the first screw member (40) is accessible from an outer side of the wedge member (10), and
• wherein:
• the cutting tool is a rotary cutting tool rotated around an axis of rotation (A);
• the insert attachment mechanism further comprises a second adjustment member (60) for moving the cutting insert in a second direction substantially orthogonal to a moving direction of the first adjustment member (30) associated with a rotation of the first screw member (40), the second adjustment member (60) comprising a second screw member (61) that is advanceable and retractable in the second direction;
• and
• the second direction of the second screw member (61) is a direction substantially parallel to the axis of rotation (A) of the rotary cutting tool.

A tool body (3) having an axis of rotation (A) and a rotating direction (R), and comprising:

• two opposing end surfaces (3a, 3b) and a peripheral part (3c) extending between two end surfaces;
• a plurality of circumferentially spaced apart insert pockets (21) arranged around the peripheral part (3c), each insert pocket (21) having a rear wall surface (3h) facing backward in the rotation direction (R), a front wall surface (3i) facing forward in the rotating direction (R), a bottom wall surface (3j) extending between the rear and front wall surfaces (3h, 3i), a first threaded hole (3m) and a second threaded hole (3k);
• and
• an insert attachment mechanism (100) associated with each insert pocket (21), the insert attachment mechanism comprising:
• a first adjustment member (30) having an adjustment member threaded hole (30c) and an insert contacting surface (30g), the first adjustment member (30) being detachably attached to the insert pocket (21) by a first screw member (40) which passes though the adjustment member threaded hole (3c) and into the insert pocket's first threaded hole (3m), wherein rotation of the first screw member (40) in opposite directions causes the first adjustment member to advance or retract with respect to the insert pocket (21) along a central axis (40c) of the first screw member (40);
• and
• a wedge member (10) detachably attached to the insert pocket (21) by a fastening screw (20) screwed into the insert pocket's second threaded hole (3k);
• wherein:
• within the insert pocket (21), the wedge member (10) is radially outward of the first adjustment member (30);
• and
• the first screw member (40) is accessible only from a radially outer side of the wedge member (10).