Tool for chip-removing machining

A tool for chip-removing machining comprising a chip-removing cutting insert, a holder for the insert, and a fixing element for fixing the insert to a seat of the holder, wherein:

• the insert defines a center axis and includes a male part protruding in the direction of the axis from a bottom side thereof, the male part having first contact surfaces disposed thereon;
• and
• the seat including a plurality of elastically flexible portions and having second contact surfaces formed thereon and arranged to be contacted by respective first contact surfaces as the insert is pressed onto the seat in an axial direction of insertion for flexing the flexible portions in the axial direction as the insert is being fixed in the seat, wherein the second contact surfaces are arranged in pairs that converge in a direction in which the insert is fixed onto the holder in the direction of the axis, for wedgingly receiving the fingers therebetween.

A tool for chip-removing machining comprising a chip-removing cutting insert, a holder for the insert, and a fixing element for fixing the insert to a seat of the holder, wherein:

• the insert defines a center axis and includes a male part protruding in the direction of the axis from a bottom side thereof, the male part having first contact surfaces disposed thereon;
• and
• the seat including a plurality of elastically flexible portions and having second contact surfaces formed thereon and arranged to be contacted by respective first contact surfaces as the insert is pressed onto the seat in an axial direction of insertion for flexing the flexible portions in the axial direction as the insert is being fixed in the seat, wherein the fixing element comprises a screw passing through the insert and the seat and threadedly secured in the holder.

A tool for chip-removing machining comprising a chip-removing cutting insert, a holder for the insert, and a fixing element for fixing the insert to a seat of the holder, wherein:

• the insert defines a center axis and includes a male part protruding in the direction of the axis from a bottom side thereof, the male part having first contact surfaces disposed thereon;
• and
• the seat including a plurality of elastically flexible portions and having second contact surfaces formed thereon and arranged to be contacted by respective first contact surfaces as the insert is pressed onto the seat in an axial direction of insertion for flexing the flexible portions in the axial direction as the insert is being fixed in the seat, wherein the fixing element comprises a clamp threadedly secured at one end thereof to the holder and engaging the insert at another end thereof.

An insert holder comprising a body in which an insert seat is formed, the seat defining a center axis extending through the body and including elastically flexible portions having free ends arranged to flex elastically substantially in the direction of the axis, contact surfaces formed on the flexible portions and extending generally in the direction of the axis, wherein the seat comprises a hole formed in a rigid surface of the body and extending along the axis, the flexible portions extending inwardly from a wall of the hole.

A method of mounting a chip-removing cutting insert in a holder, the insert defining a center axis, the method comprising the steps of:

• A) positioning a bottom side of the insert over the holder, wherein a protrusion extending axially from the bottom side faces a seat of the holder, the seat including flexible portions elastically flexible relative to a rigid portion of the holder in a direction of the axis;
• and
• B) clamping the insert to the holder to cause the protrusion to press against the flexible portions in the direction of the axis to elastically flex the flexible portions in the direction of the axis until the bottom side of the insert engages the rigid contact portion of the holder, wherein the flexible portions extend inwardly from a side of a hole formed in the rigid portion of the holder, the protrusion comprises fingers arranged to enter recesses disposed between the flexible portions, the recesses and the fingers tapering in the direction of flexing, wherein the fingers enter the respective recesses during step B to become wedged between the flexible portions.

An insert holder comprising a body in which an insert seat is formed, the seat defining a center axis extending through the body and including elastically flexible portions having free ends arranged to flex elastically substantially in the direction of the axis, contact surfaces formed on the flexible portions and extending generally in the direction of the axis, wherein the body includes a threaded hole formed therein along the axis for receiving a fastening screw.