A slot milling sequence includes a plurality of material removal processes or operations. Each of the material removal operations includes utilization of an end mill tool. Some of the material removal operations utilize trochoidal tool paths, whereas other material removal processes utilize one or more profile cuts. Some material removal operations that utilize profile cuts remove material from both sides of the cut in a single pass, whereas other material removal operations remove material from one side of the cut via a first pass of the end mill tool and remove material from the opposing side of the cut via a second pass of the end mill tool.

A slot milling sequence includes a plurality of material removal processes or operations. Each of the material removal operations includes utilization of an end mill tool. Some of the material removal operations utilize trochoidal tool paths, whereas other material removal processes utilize one or more profile cuts. Some material removal operations that utilize profile cuts remove material from both sides of the cut in a single pass, whereas other material removal operations remove material from one side of the cut via a first pass of the end mill tool and remove material from the opposing side of the cut via a second pass of the end mill tool.

A milling tool is suggested having a base body (3), a central axis (M), and a front side (5), whereby at least two geometrically defined first front edges (9) that are arranged, respectively, at front side (5) of base body (3) exhibit a first edge section (13) facing central axis (M). Milling tool (1) distinguishes itself by the first edge sections (13) of the at least two front edges (9) being formed in an ascending fashion towards center axis (M), so that they form a centering tip (15), and that centering tip (15) is arranged in a recessed manner in an axial direction when compared with an axial outermost point (17) of at least two of the first front edges (9) (FIG. 1).

A milling tool is suggested having a base body (3), a central axis (M), and a front side (5), whereby at least two geometrically defined first front edges (9) that are arranged, respectively, at front side (5) of base body (3) exhibit a first edge section (13) facing central axis (M). Milling tool (1) distinguishes itself by the first edge sections (13) of the at least two front edges (9) being formed in an ascending fashion towards center axis (M), so that they form a centering tip (15), and that centering tip (15) is arranged in a recessed manner in an axial direction when compared with an axial outermost point (17) of at least two of the first front edges (9) (FIG. 1).

A bit cutter is used to cut a bit, where the bit cutter matches the configuration of a recess in a corresponding fastener. The resulting bit contacts the top of the recess of a fastener, along a plurality of lines of contact. The fact that the contact is along a plurality of lines, as opposed to mere points, provides for improved frictional adhesion or stick fit between the bit and the fastener.

A milling method includes moving a milling tool having at least two axially spaced apart sets of cutting inserts to an axial position within a bore in a material and rotating the milling tool about a longitudinal axis. The method further includes initiating contact between the milling tool and a wall of the bore in a region of the wall having a least amount of material at the axial position. The method further includes moving the milling tool around a perimeter of the bore.

A milling method includes moving a milling tool having at least two axially spaced apart sets of cutting inserts to an axial position within a bore in a material and rotating the milling tool about a longitudinal axis. The method further includes initiating contact between the milling tool and a wall of the bore in a region of the wall having a least amount of material at the axial position. The method further includes moving the milling tool around a perimeter of the bore.

A cutting apparatus includes a cassette table on which a first cassette in which a frame unit, ring-shaped frame and wafer are housed, and a second cassette in which a simple wafer is housed. A first conveying unit having a first frame holding part holds the ring-shaped frame of the frame unit withdrawn from the first cassette and conveys the frame unit to a chuck table. A first wafer holding part holds the simple wafer withdrawn from the second cassette and conveys the simple wafer to the chuck table. A cutting unit cuts the wafer, and a second conveying unit conveys the frame unit from the chuck table to a cleaning unit. A second wafer holding part holds the cut simple wafer and conveys it from the chuck table to the cleaning unit.

Certain embodiments of the present disclosure provide an acoustic inlet barrel of an engine. The acoustic inlet barrel may include an inner barrel configured to provide a boundary for directing airflow through the engine. The inner barrel may include an inner face sheet separated from an outer face sheet by an acoustic core. The inner barrel may include a plurality of elongated, non-circular perforations formed through the inner face sheet.

Certain embodiments of the present disclosure provide an acoustic inlet barrel of an engine. The acoustic inlet barrel may include an inner barrel configured to provide a boundary for directing airflow through the engine. The inner barrel may include an inner face sheet separated from an outer face sheet by an acoustic core. The inner barrel may include a plurality of elongated, non-circular perforations formed through the inner face sheet.