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.

A clamping device for releasably holding a tool holder shank is formed with an engagement bore in a rear end. The clamping device includes a housing having a mounting bore for receiving the tool holder shank; a drawbar being mounted reciprocally movable inside the housing and which in a forward end is provided with an engagement segment which is arranged to engage with an engagement formation inside the engagement bore of the tool holder shank, wherein the drawbar is in a rear portion formed with a drawbar aperture extending through the drawbar, and a cam shaft extending through the drawbar aperture and comprising a cam formation. The cam shaft is rotatably journalled in the housing and arranged to impart an axial displacement to the drawbar in relation to the housing by the cam formation when rotating the cam shaft. The cam shaft includes two identical cam formations, which are spaced apart by a recess, and the drawbar is on the inside of the aperture formed with a ridge on each side of the aperture which each fits in the recess of the cam shaft when rotating the same.

A cutting tool for boring (40) that is attached to a machining apparatus and used for cutting a hole (13) on a large-diameter side of a stepped hole of a workpiece (10) is provided. The cutting tool for boring (40) is a set of two tools, and each cutting tool for boring (40a, 40b) in the set of two includes a shaft part (41), a cutting blade (42) laterally protruding from the respective shaft parts (41), and an abutment surface (43) formed at the tip of each shaft part (41) and used to cause the tips of the respective shaft parts (41) to butt against each other. Each cutting tool for boring (40a, 40b) performs cutting while the two cutting tools for boring (40a, 40b) rotate integrally around the center line of the shaft parts (41) in a coupled state in which the tips of the cutting tools for boring (40a, 40b) are butted together.

A machining apparatus includes: a shuttle unit (3) that holds a differential case (10) and rotates the differential case (10); a pair of opposed right and left machining units (4); and a tool support (6) that supports a tool (40) for machining the differential case (10), in which the pair of right and left machining units (4) each include a slide mechanism dedicated for uniaxial sliding in right and left directions, the shuttle unit (3) is movable in up and down directions and front and back directions, a tool attached to each of the pair of right and left machining units (4) enables machining an end portion of an inner surface of the differential case (10) and a flange hole of the differential case (10), the end portion surrounding a through hole, and a cutting edge of the tool (40) supported by the tool support (6) enables spherically cutting the inner surface of the differential case (10) held and rotated by the shuttle unit (3).

A cutting tool (35) for machining a differential case, the cutting tool (35) being attached to a machining apparatus and used to perform cutting on a spherical inner surface of a differential case (10), the cutting tool (35) including: a shaft part (50); a cutting edge (51) laterally protruding from the shaft part (50); a fixing part (53) formed at one end side of the shaft part (50) and that is for fixing the shaft part (50) to the machining apparatus; and a retaining part (54) formed at the other end side of the shaft part (50) and that is for retaining the shaft part (50) by the machining apparatus, wherein the cutting tool (35) is able to perform cutting on the spherical inner surface of the rotating differential case (10) in a both-ends-held state in which both the fixing part (53) and the retaining part (54) are supported by the machining apparatus.

A drilling system includes a single robotic drilling unit having a drill end effector positioned inside a barrel section configured as a composite sandwich structure having an inner face sheet. The robotic drilling unit is operable to drill a plurality of perforations into the inner face sheet using the drill end effector. The robotic drilling unit is configured to index a hole pattern of the perforations to one or more cell walls of a honeycomb core of the composite sandwich structure. The robotic drilling unit is configured to form the hole pattern in the inner face sheet such that the perforations are located at a spaced distance from the cell walls of the honeycomb core.

A cutting tool (35) for machining a differential case, the cutting tool (35) being attached to a machining apparatus and used to perform cutting on a spherical inner surface of a differential case (10), the cutting tool (35) including: a shaft part (50); a cutting edge (51) laterally protruding from the shaft part (50); a fixing part (53) formed at one end side of the shaft part (50) and that is for fixing the shaft part (50) to the machining apparatus; and a retaining part (54) formed at the other end side of the shaft part (50) and that is for retaining the shaft part (50) by the machining apparatus, wherein the cutting tool (35) is able to perform cutting on the spherical inner surface of the rotating differential case (10) in a both-ends-held state in which both the fixing part (53) and the retaining part (54) are supported by the machining apparatus.

A machining apparatus includes: a shuttle unit (3) that holds a differential case (10) and rotates the differential case (10); a pair of opposed right and left machining units (4); and a tool support (6) that supports a tool (40) for machining the differential case (10), in which the pair of right and left machining units (4) each include a slide mechanism dedicated for uniaxial sliding in right and left directions, the shuttle unit (3) is movable in up and down directions and front and back directions, a tool attached to each of the pair of right and left machining units (4) enables machining an end portion of an inner surface of the differential case (10) and a flange hole of the differential case (10), the end portion surrounding a through hole, and a cutting edge of the tool (40) supported by the tool support (6) enables spherically cutting the inner surface of the differential case (10) held and rotated by the shuttle unit (3).

A turning tool includes a tool body extending along a tool axis and having a base on a tip of the tool body, a cutting insert detachably attached to the base, and a measurement device attached to the tool body. The measurement device has a first distance sensor which measures a distance to an object located radially outward of the tool axis.

An aluminum component and a method for manufacturing the aluminum component has a forming step and a cutting step. Projections (f) extend in an axial direction and are continuously arranged in a circumferential direction. End portions of the projections (f) are cut along a processing line having a predetermined processing diameter (D) providing splines (S) of predetermined dimensions. Side surfaces (fa) are inclined to be tapered in a direction from a base end to a projecting end. A portion of each side surface (fa) adjacent to the projecting end is an inclined surface (fb) with an inclination angle less than an inclination angle of a portion of the side surface that is adjacent to the base end.