A method for performing a cutting operation on a workpiece is provided. The method comprises providing a workpiece being made of a metal characterized by a thermal conductivity of no greater than about 100 W100 .sup.W/.sub.(m.Math.K) (approximately 57.8 .sup.Btu/.sub.(hr ft ° F.)), providing a cutting device comprising an internal cooling cavity defined on one side thereof by a thin-walled structure, and performing a cutting operation on the workpiece using the cutting device. The cutting speed is no less than about 500 .sup.m/.sub.min. (approximately 1640 .sup.ft/.sub.min).

A cutting tool may include a main body having a bar shape extended along a central axis. The main body may include a cutting edge, a first flow path, a second flow path, a third flow and a fourth flow path. The first flow path is located along the central axis and may include an inflow port. The second flow path is located along the central axis and may include a smaller inner diameter than the first flow path. The third flow path may connect to the first flow path and may include a first outflow port. The fourth flow path may connect to the second flow path and may include a second outflow port. The first outflow port is located more away from an imaginary plane including the central axis and the cutting edge than the second outflow port.

A cutting tool may include a main body having a bar shape extended along a central axis. The main body may include a cutting edge, a first flow path, a second flow path, a third flow and a fourth flow path. The first flow path is located along the central axis and may include an inflow port. The second flow path is located along the central axis and may include a smaller inner diameter than the first flow path. The third flow path may connect to the first flow path and may include a first outflow port. The fourth flow path may connect to the second flow path and may include a second outflow port. The first outflow port is located more away from an imaginary plane including the central axis and the cutting edge than the second outflow port.

An apparatus and corresponding method for machining at least one spline in an aeronautical component. The apparatus comprises a holder defining an axial direction about which the holder is moveable, and a cutting insert attachable to the holder. The apparatus further comprises a coupling for attaching the cutting insert to the holder about a second direction that is perpendicular to the axial direction of the holder. The holder may comprise a first alignment feature for orientating the cutting insert at a single orientation with respect to the holder. The cutting insert may comprise at least one cutting tooth, wherein each cutting tooth comprises a cutting edge. The cutting insert may comprise a first datum surface which is spaced from each cutting edge by a respective predetermined spacing.

An apparatus and corresponding method for machining at least one spline in an aeronautical component. The apparatus comprises a holder defining an axial direction about which the holder is moveable, and a cutting insert attachable to the holder. The apparatus further comprises a coupling for attaching the cutting insert to the holder about a second direction that is perpendicular to the axial direction of the holder. The holder may comprise a first alignment feature for orientating the cutting insert at a single orientation with respect to the holder. The cutting insert may comprise at least one cutting tooth, wherein each cutting tooth comprises a cutting edge. The cutting insert may comprise a first datum surface which is spaced from each cutting edge by a respective predetermined spacing.

A clamping device is configured to clamp a cutting insert onto a holder of a cutting tool. The clamping device contains a clamping bolt and a locking bolt, wherein the clamping bolt is configured to be inserted into each of the cutting insert and the holder. The locking bolt is configured to be inserted into the holder, such that the locking bolt pre-strains the clamping bolt into clamping the cutting insert onto the holder. The clamping bolt is configured rotatable about a longitudinal clamping axis of the clamping bolt relative to each of the cutting insert and the locking bolt, such that the clamping bolt wedge engages with the locking bolt during a clamping bolt rotation about the longitudinal clamping axis.

A cutting tool holder according to one embodiment supports a cutting insert including a rake face, a flank face, and a cutting edge. The cutting tool holder according to one embodiment includes: a holder body having a seat face on which the cutting insert is placed; a pressing member that positions and fixes the cutting insert to the holder body; and a fixing member that fixes the pressing member to the holder body. The pressing member has: a front end portion close to the cutting edge; and a base end portion distant away from the cutting edge. The front end portion is provided with a first coolant ejection hole. A first flow path is provided inside the holder body. A coolant reservoir and a second flow path are provided inside the pressing member.

A cutting tool holder according to one embodiment supports a cutting insert including a rake face, a flank face, and a cutting edge. The cutting tool holder according to one embodiment includes: a holder body having a seat face on which the cutting insert is placed; a pressing member that positions and fixes the cutting insert to the holder body; and a fixing member that fixes the pressing member to the holder body. The pressing member has: a front end portion close to the cutting edge; and a base end portion distant away from the cutting edge. The front end portion is provided with a first coolant ejection hole. A first flow path is provided inside the holder body. A coolant reservoir and a second flow path are provided inside the pressing member.

An insert includes a base which includes a first surface, a second surface connecting to the first surface, and a cutting edge located on at least a part of a ridgeline of the first surface and the second surface. The first surface includes a plurality of grooves located at a position away from the ridgeline and extended at an angle of 20-90° relative to the ridgeline. The grooves are away from the ridgeline in a range of 40-700 μm. A width W of the grooves is 50-700 μm, and a depth D of the grooves is 20-700 μm. Spacing S between the grooves adjacent to each other is 50-700 μm. A cutting tool includes a holder, which has a length extending from a first end to a second end and includes a pocket located on a side of the first end, and the insert is located in the pocket.

Improvements in tooling for machining systems that utilize machining fluids comprising a supercritical fluid are disclosed. In some embodiments a tool may include a plurality of orifices configured to direct a supercritical machining fluid towards a cutting interface of the tool. In other embodiments, a tool holder may include one or more outlets configured to direct a supercritical machining fluid towards a cutting interface. Moreover, some embodiments, may relate to machining systems including one or more venting channels configured to provide pressure relief for a cavity located behind a tool holder. Embodiments related to machine tools including upstream fluid restrictions for controlling a flow of supercritical machining fluid through a tool are also disclosed.