Patent ID: 11969807
Assignee: TAEGUTEC LTD.
Field: Machine tools (Mechanical engineering)
Classification: CPC B | IPC B

Claim 0:
1. A rectangular insert configured to be assembled to a tool holder for cutting a workpiece, the insert comprising:
an upper surface including first, second, third, and fourth upper corner portions formed in respective quadrants divided by a first imaginary vertical axis and a first imaginary horizontal axis that are perpendicular to each other;
a lower surface formed below the upper surface in a height direction and including first, second, third, and fourth lower corner portions formed in respective quadrants divided by a second imaginary vertical axis and a second imaginary horizontal axis that are perpendicular to each other, the first lower corner portion and the second lower corner portion defining a first side surface therebetween, the second lower corner portion and the third lower corner portion defining a second side surface therebetween, the first side surface having a first length in a direction parallel to the second imaginary horizontal axis, the second side surface having a second length in a direction parallel to the second imaginary vertical axis, the second length being different from the first length, and
a height direction center line (M1) passing through the upper surface and the lower surface,
wherein the first upper corner portion and the first lower corner portion are respectively disposed on an upper side in a longitudinal direction of the tool holder and an inner side in a radial direction of the tool holder,
wherein the first, second, third, and fourth upper corner portions are arranged in order in a counterclockwise direction about the height direction center line (M1) in a top view of the insert, with respect to the first upper corner portion,
wherein the first, second, third, and fourth lower corner portions are arranged in order in the counterclockwise direction about the height direction center line (M1) in said top view of the insert, with respect to the first lower corner portion,
wherein the second lower corner portion and the fourth lower corner portion are rotationally symmetrical with one another about said height direction center line,
wherein the first lower corner portion and the third lower corner portion are rotationally symmetrical with one another about said height direction center line and are located above the second and fourth lower corner portions in the height direction,
wherein the lower surface is configured to be seated in an insert pocket of the tool holder,
wherein the lower surface comprises:
a lower ridge portion protruding downward in the height direction and having a central longitudinal ridge axis, the central longitudinal ridge axis extending between the second and fourth lower corner portions in a diagonal direction, the lower ridge portion passing through the second and fourth lower corner portions;
a first lower support surface formed on a side of the lower ridge portion; and
a second lower support surface formed on an opposite side of the lower ridge portion, and

wherein the first lower support surface extends from the lower ridge portion to a peripheral edge of the lower surface in the first lower corner portion, wherein the first lower support surface is inclined upward in the height direction from the lower ridge portion toward the first lower corner portion and the second lower support surface extends from the lower ridge portion to a peripheral edge of the lower surface in the third lower corner portion, wherein the second lower support surface is inclined upward in the height direction from the lower ridge portion toward the third lower corner portion.