A method for manufacturing a tool head includes forming a first and a second part from a powder composition. The first and the second parts include corresponding joining surfaces, and the parts have outer surface portions configured to form portions of a peripheral envelope surface of the tool head. The method further includes forming corresponding grooves in the corresponding joining surfaces, assembling the parts into a shape of a tool head by bringing the joining surfaces into contact to form an interface, so that each pair of corresponding grooves forms a channel extending in the interface, the channel having an inlet opening in a rear end of the tool head and an outlet opening in a front end or in the peripheral envelope surface of the tool head, and joining the assembled parts in a sintering operation to form the tool head.

A method for manufacturing a tool head includes forming a first and a second part from a powder composition. The first and the second parts include corresponding joining surfaces, and the parts have outer surface portions configured to form portions of a peripheral envelope surface of the tool head. The method further includes forming corresponding grooves in the corresponding joining surfaces, assembling the parts into a shape of a tool head by bringing the joining surfaces into contact to form an interface, so that each pair of corresponding grooves forms a channel extending in the interface, the channel having an inlet opening in a rear end of the tool head and an outlet opening in a front end or in the peripheral envelope surface of the tool head, and joining the assembled parts in a sintering operation to form the tool head.

A cutting tool includes a substrate and a diamond layer that covers the substrate. The diamond layer includes a rake face and a flank continuous to the rake face. A ridgeline between the rake face and the flank forms a cutting edge. The substrate includes a top surface opposed to the rake face. When viewed in a direction perpendicular to the top surface, the rake face includes a plurality of protrusions. In a cross-section perpendicular to a direction of extension of the cutting edge, each of the plurality of protrusions includes an inclined portion and a curvature portion continuous to the inclined portion. In the cross-section, a height of the inclined portion in the direction perpendicular to the top surface increases as a distance from the cutting edge increases.

The invention relates to a method for producing a roughing tool (1), particularly a circular milling tool, comprising the following steps: fitting a lateral surface of a tool base body (10) that can be rotatably driven about an axis of rotation (2) with a number of cutting element blanks (20) that are staggered in the axial and/or peripheral direction, such that a free edge of each cutting element blank (20) protrudes out of the lateral surface in the mounted state; inserting a microtoothing comprising a plurality of axially spaced cutting teeth (21) into the respective free edges of the cutting element blanks (20) by a material removal method, preferably by thermal machining, particularly preferably by eroding, in the premounted state on the tool base body (10). The invention further relates to a roughing tool produced by means of such a method.

A shank includes a captive portion, having a longitudinal central axis, a captive end, a first set of first structures, and a second set of second structure. The second set of the second structures is closer to the captive end than the first set of the first structures. The first set of the first structures has a first axial compliance coefficient along the longitudinal central axis. The second set of the second structures has a second axial compliance coefficient along the longitudinal central axis. The first axial compliance coefficient of the first set of the first structures is greater than the second axial compliance coefficient of the second set of the second structures.

A shank includes a captive portion, having a longitudinal central axis, a captive end, a first set of first structures, and a second set of second structure. The second set of the second structures is closer to the captive end than the first set of the first structures. The first set of the first structures has a first axial compliance coefficient along the longitudinal central axis. The second set of the second structures has a second axial compliance coefficient along the longitudinal central axis. The first axial compliance coefficient of the first set of the first structures is greater than the second axial compliance coefficient of the second set of the second structures.

A reusing method of an end mill involves machining a base material of an end mill in advance so as to have coaxiality equal accuracy to coaxiality for a cutting part, and when the cutting part is worn out, cutting off of the cutting part and machining a new cutting part on a shank part while a part of outer peripheral surface of the shank part is left as margin without cutting. The new cutting part has accuracy of coaxiality and an outer diameter identical to those of the cutting part.

A reusing method of an end mill involves machining a base material of an end mill in advance so as to have coaxiality equal accuracy to coaxiality for a cutting part, and when the cutting part is worn out, cutting off of the cutting part and machining a new cutting part on a shank part while a part of outer peripheral surface of the shank part is left as margin without cutting. The new cutting part has accuracy of coaxiality and an outer diameter identical to those of the cutting part.

A machining tool, in particular a drill carrier tool, includes a monolithic base body extending in the axial direction which, at least in one section, has a porous or grid-like core structure that is encased in a solid outer jacket. These measures allow less material to be used, while maintaining good mechanical properties. The porous or grid-like core structure is simultaneously used for transporting coolant. The base body is manufactured in particular by means of a 3D printing method.

A method for producing a cutting tool is described. This method includes the production of a tool body of the cutting tool by means of a generative production method. At least one coolant cavity that has, at least in segments, an essentially triangular cross section is in this case provided in the tool body. Moreover, a cutting tool produced by means of this method is presented. Also proposed is a cutting tool having at least one coolant cavity running therein, wherein the coolant cavity has, at least in segments, an essentially triangular cross section and the cutting tool is produced, at least in segments, by means of a generative production method.