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.

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 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 hob for a cutting apparatus including a hollow body of a sintered hard metal composition and a cavity located within the body, the cavity having a volume in the range of about 10% to about 90% of the volume of the body.

A hob for a cutting apparatus including a hollow body of a sintered hard metal composition and a cavity located within the body, the cavity having a volume in the range of about 10% to about 90% of the volume of the body.

A method and apparatus for the refurbishment and repowering of wind turbines through the extension of existing installed blades so that they can catch more wind energy and therefore enable an increase in the overall average power output of the wind turbine.

A system for machining an abradable material of a gas turbine engine and associated methods. The system includes a frame including a first arm extending from a central location. The system further includes an attachment structure coupled to the frame at the central location. Moreover, the attachment structure is configured to couple to at least a fan rotor of the gas turbine engine. Additionally, the system includes a cutting apparatus coupled to a first distal end of the first arm opposite the central location. The cutting apparatus includes a rotating shaft and plurality of cutting disks coupled to the rotating shaft. Further, the plurality of cutting disks define a helical cutting profile configured to machine a contour within the abradable material complementary to at least one fan blade of the gas turbine engine.

A system for machining an abradable material of a gas turbine engine and associated methods. The system includes a frame including a first arm extending from a central location. The system further includes an attachment structure coupled to the frame at the central location. Moreover, the attachment structure is configured to couple to at least a fan rotor of the gas turbine engine. Additionally, the system includes a cutting apparatus coupled to a first distal end of the first arm opposite the central location. The cutting apparatus includes a rotating shaft and plurality of cutting disks coupled to the rotating shaft. Further, the plurality of cutting disks define a helical cutting profile configured to machine a contour within the abradable material complementary to at least one fan blade of the gas turbine engine.

A plurality of cutting bodies each having a cutting edge are arranged on the main body of a machining tool. During operation, the plurality of cutting bodies rotate in a direction of rotation which runs around an axis of rotation. Each cutting edge has exactly one reference point. The reference points are mutually spaced in the direction perpendicular to the direction of rotation. Reference points of cutting bodies that are directly adjacent in the direction perpendicular to the direction of rotation are arranged with mutual angular spacings with respect to the axis of rotation. The spacings are integer multiples of angle values which lie in an angle range of +/−5° with respect to the golden angle. The sum of the golden angle and an opposite angle produces the round angle. The ratio of golden angle to opposite angle is equal to the ratio of opposite angle to round angle.