A beveling cutter can include a body with a shaft hole formed through the center. The cutter can also include a plurality of 10 cutter blades arranged at predetermined distances on the circumferential surface of the body, each having a radial primary blade with a radial primary relief angle (a) ranging from about 5 to about 15 degrees and a radial secondary blade with a radial secondary relief angle (b) ranging from about 16 to about 30 degrees. The cutter can also include discharge grooves formed longitudinally between the cutter blades to discharge chips produced in beveling, and a key groove formed at a portion inside the body, in which the helix angle (d) of the cutter blades ranges from about 5 to about 45 degrees. With the beveling cutter, it is possible to smoothly discharge chips produced in beveling and to prevent damage to the cutter blades.

A beveling cutter can include a body with a shaft hole formed through the center. The cutter can also include a plurality of 10 cutter blades arranged at predetermined distances on the circumferential surface of the body, each having a radial primary blade with a radial primary relief angle (a) ranging from about 5 to about 15 degrees and a radial secondary blade with a radial secondary relief angle (b) ranging from about 16 to about 30 degrees. The cutter can also include discharge grooves formed longitudinally between the cutter blades to discharge chips produced in beveling, and a key groove formed at a portion inside the body, in which the helix angle (d) of the cutter blades ranges from about 5 to about 45 degrees. With the beveling cutter, it is possible to smoothly discharge chips produced in beveling and to prevent damage to the cutter blades.

A method of manufacturing an extrusion die (102, 152, 302). The method comprises providing the extrusion die (102, 152, 302), the extrusion die (102, 152, 302) having a plurality of die pins (154, 316) defining a plurality of slots (156, 320), the plurality of die pins (154, 316) having an initial die pin width and an initial die pin depth and the plurality of slots having an initial slot width (Ws) and an initial slot depth (Ds), providing a micro-milling machine (104) with a spindle (122), providing a micro-cutting tool (120) coupled to the spindle (122), mounting the extrusion die (102, 152, 302) proximate the micro-cutting tool (120), and removing material from one or more die pins (154, 316) using the micro-cutting tool (120), the micro-cutting tool (120) making one or more cutting passes against the one or more die pins (154, 316) to remove the material. Micro-milling apparatuses and further methods are provided, as are other aspects.

A method of manufacturing an extrusion die (102, 152, 302). The method comprises providing the extrusion die (102, 152, 302), the extrusion die (102, 152, 302) having a plurality of die pins (154, 316) defining a plurality of slots (156, 320), the plurality of die pins (154, 316) having an initial die pin width and an initial die pin depth and the plurality of slots having an initial slot width (Ws) and an initial slot depth (Ds), providing a micro-milling machine (104) with a spindle (122), providing a micro-cutting tool (120) coupled to the spindle (122), mounting the extrusion die (102, 152, 302) proximate the micro-cutting tool (120), and removing material from one or more die pins (154, 316) using the micro-cutting tool (120), the micro-cutting tool (120) making one or more cutting passes against the one or more die pins (154, 316) to remove the material. Micro-milling apparatuses and further methods are provided, as are other aspects.

Bell-shaped milling cutter for producing preferably profiled, arcuate grooves, has a main body in the form of a circular disk and a plurality of cutting edge carriers which extend substantially perpendicularly to the plane of the main body and which are arranged in succession in the peripheral direction along a circular path about the center of the main body and are mounted releasably to the main body. To provide a bell-shaped milling cutter having the features set out in the opening part of this specification, which permits simplified and less expensive production of arcuate grooves without having to forego the precise arrangement and orientation of the cutting bits of the known bell-shaped milling cutters, provided at the main body are positioning devices which permit mounting of the cutting edge carriers in a plurality of mutually different radial spacings on the main body.

Bell-shaped milling cutter for producing preferably profiled, arcuate grooves, has a main body in the form of a circular disk and a plurality of cutting edge carriers which extend substantially perpendicularly to the plane of the main body and which are arranged in succession in the peripheral direction along a circular path about the center of the main body and are mounted releasably to the main body. To provide a bell-shaped milling cutter having the features set out in the opening part of this specification, which permits simplified and less expensive production of arcuate grooves without having to forego the precise arrangement and orientation of the cutting bits of the known bell-shaped milling cutters, provided at the main body are positioning devices which permit mounting of the cutting edge carriers in a plurality of mutually different radial spacings on the main body.

A formed rotary cutting tool includes a cutting edge defining a cutting edge diameter that is increased and reduced in a direction of an axis of the tool, so as to have at least one neck portion in which the cutting edge diameter is minimized. The cutting tool includes a roughing portion which is provided on a periphery thereof and which is constituted by a succession of protrusions and recesses arranged in the direction of the axis. The roughing portion includes (i) a fine roughing portion that is provided in at least one of the at least one neck portion, and (ii) another portion that is provided in a portion that is other than the at least one of the at least one neck portion. The fine roughing portion of the roughing portion is different in characteristics from the above-described another portion of the roughing portion.

A machining tool having has a body that includes a central tubular portion forming a duct centered on a longitudinal axis. A peripheral tubular portion is coaxial with the central tubular portion and surrounds the central tubular portion. A first machining stage has a first arm and a second arm that extend on either side of the central tubular portion. The first arm and the second arm each have a machining member at the end thereof. The first arm and the second arm are each integral with the central tubular portion and the peripheral tubular portion. The machining tool body also includes a baseplate. The peripheral tubular portion has at least one linking arch connecting the first arm and the second arm and bypassing the central tubular portion.

A machining tool having has a body that includes a central tubular portion forming a duct centered on a longitudinal axis. A peripheral tubular portion is coaxial with the central tubular portion and surrounds the central tubular portion. A first machining stage has a first arm and a second arm that extend on either side of the central tubular portion. The first arm and the second arm each have a machining member at the end thereof. The first arm and the second arm are each integral with the central tubular portion and the peripheral tubular portion. The machining tool body also includes a baseplate. The peripheral tubular portion has at least one linking arch connecting the first arm and the second arm and bypassing the central tubular portion.

A tool head is for machining edges of a workpiece and includes a first tool section with first blades and a second tool section with second blades. The second blades are positioned between the first blades when seen in the circumferential direction. The second section is movable relative to the first section in the direction of the longitudinal axis between a passive and active position. The second blades are axially recessed relative to the first blades in the passive position and project axially outwards between the first blades in the active position. The tool head has a pressure switching mechanism for moving the second tool section between the passive and active position. In a tool system, the tool head and an actuation element can be moved axially relative to each other. The at least one actuation surface and the actuation element are configured to be axially pressed towards each other.