Cutting insert

Abstract

Cutting insert (100, 200, 300) with: an upper surface (110, 210, 310), a lower surface (120, 220, 320) and several side surfaces (130, 140, 150, 230, 240, 250) that connect the upper and lower surfaces (110, 210, 310, 120, 220, 320) and form an obtuse angle with the lower surface (120, 220, 320) and an acute angle with the upper surface (110, 210, 310), wherein the side surfaces (130, 140, 150, 230, 240, 250) have a first side surface (132, 142, 232, 242, 332, 342) and a second side surface (134, 144, 234', 234", 244', 244", 334, 344) which, viewed from above, form an obtuse angle with each other, wherein a main cutting edge (160, 170, 260, 270, 360, 370) is formed on a line of intersection between the first side surface (132, 142, 232, 242, 332, 342) and the upper surface (110, 210, 310), and wherein an inclined cutting edge (162, 172, 262, 272, 362, 372) only for plunge milling and a secondary cutting edge (164, 174, 264, 274, 364, 374) on a cutting line between the second side surface (134, 144, 234', 234", 244', 244", 334, 344) and the upper surface (110, 210, 310) are formed, characterized in that an obtuse angle formed by the second face (134, 144, 234', 234", 244', 244", 334, 344) with the lower face (120, 220, 320) is greater than the angle formed by the first face (132, 142, 232, 242, 332, 342) with the lower face (120, 220, 320), and the upper and lower surfaces (110, 120, 210, 220) are triangular in shape.

Description

[0001] Regarding the European patent EP 2 435 204 B1 published on 30 March 2017 with effect for the Federal Republic of Germany (national patent number DE 60 2009 048 733), the German Patent and Trade Mark Office decided at its meeting of 14 October 2025:

[0002] The patent is limited in accordance with Section 64 of the Patent Act by the following amendment to the patent claims:

Claims

[1] Cutting insert (100, 200, 300) with: an upper surface (110, 210, 310), a lower surface (120, 220, 320) and several side surfaces (130, 140, 150, 230, 240, 250) that connect the upper and lower surfaces (110, 210, 310, 120, 220, 320) and form an obtuse angle with the lower surface (120, 220, 320) and an acute angle with the upper surface (110, 210, 310), wherein the side surfaces (130, 140, 150, 230, 240, 250) have a first side surface (132, 142, 232, 242, 332, 342) and a second side surface (134, 144, 234', 234", 244', 244", 334, 344) which, viewed from above, form an obtuse angle with each other, wherein a main cutting edge (160, 170, 260, 270, 360, 370) is formed on a line of intersection between the first side surface (132, 142, 232, 242, 332, 342) and the upper surface (110, 210, 310), and wherein an inclined cutting edge (162, 172, 262, 272, 362, 372) only for plunge milling and a secondary cutting edge (164, 174, 264, 274, 364, 374) on a cutting line between the second side surface (134, 144, 234', 234", 244', 244", 334, 344) and the upper surface (110, 210, 310) are formed, characterized by , that an obtuse angle formed by the second face (134, 144, 234', 234", 244', 244", 334, 344) with the lower face (120, 220, 320) is greater than the angle formed by the first face (132, 142, 232, 242, 332, 342) with the lower face (120, 220, 320), and the upper and lower surfaces (110, 120, 210, 220) are triangular in shape. [2] Cutting insert according to claim 1, wherein the main cutting edge (160, 170, 260, 270, 360, 370) extends obliquely downwards from a corner (180) of the upper surface (110, 210, 310), wherein the inclined cutting edge (162, 172, 262, 272, 362, 372) extends obliquely upwards from a point of contact (X) with the main cutting edge (160, 170, 260, 270, 360, 370) to a point of contact (Y) with the secondary cutting edge (164, 174, 264, 274, 364, 374), wherein the secondary cutting edge (164, 174, 264, 274, 364, 374) extends from a point of contact (Y) with the inclined cutting edge (162, 172, 262, 272, 362, 372) extends obliquely to another corner (182) of the upper surface (110, 210, 310), and wherein an angle at which the secondary cutting edge (164, 174, 264, 274, 364, 374) extends obliquely with respect to the lower surface (120, 220, 320) is smaller than that at which the inclined cutting edge (162, 172, 262, 272, 362, 372) extends with respect to the lower surface (120, 220,320) extends diagonally., [3] Cutting insert (200) according to claim 1, wherein the second side surface (234', 234", 244', 244") has a first flat surface (234') and a second flat surface (234") which form an obtuse angle to each other when viewed from above, wherein the inclined cutting edge (262, 272) is formed on a cutting line between the first flat surface (234') and the upper surface (210), and wherein the secondary cutting edge (264, 274) is formed on a cutting line between the second flat surface (234") and the upper surface (210). [4] Cutting insert (200) according to claim 3, wherein the main cutting edge (260, 270) extends obliquely downwards from a corner of the upper surface (220), and wherein the inclined cutting edge (262, 272) extends obliquely upwards from a point of contact with the main cutting edge (260, 270) to a point of contact with the secondary cutting edge (264, 274). [5] Cutting insert (100, 200, 300) according to any one of claims 2 to 4, wherein an angle formed by the first side surface (132, 142, 232, 242, 332, 342) with the lower surface (110, 210, 310, 120, 220, 320) increases along the main cutting edge (160, 170, 260, 270, 360, 370) from the corner of the upper surface (110, 210, 310) to a point of contact with the inclined cutting edge (162, 172, 262, 272, 362, 372). [6] Cutting insert (100, 200) according to any one of claims 2 to 4, wherein the first side surface (132, 142, 232, 242) has a first curved surface (136, 146) that intersects the main cutting edge (160, 170, 260, 270) and a second flat surface (138, 148) below the first curved surface, and wherein an angle formed by the first curved surface with the lower surface (120, 220) increases along the main cutting edge (160, 170, 260, 270) from the corner of the upper surface (110, 210) to a point of contact with the inclined cutting edge (162, 172, 262, 272). [7] Cutting insert (100, 200) according to one of claims 2 to 4, wherein adjacent side surfaces (134, 142, 234", 242) form a right angle with each other when viewed from above via a corner surface. [8] Cutting insert (300) according to one of claims 2 to 4, wherein the upper and lower surfaces (310, 320) are rectangular, and wherein adjacent side surfaces (332, 342) form an obtuse angle with each other when viewed from above via a corner surface.