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.

The invention relates to a method for machining the interior of a brake caliper (1) of a disc brake, on which are formed: a first saddle portion to the one side of the brake disc of the disc brake, a second saddle portion to the other side of the brake disc, and a bridge section connecting the saddle portions and providing a free space for at least a part of the brake disc. At least one of the saddle portions is provided with a hollow space (7) for receiving a brake application device, wherein said hollow space comprises a mounting opening (4) towards the free space and extends in the opposite direction until a saddle rear wall (18). At least one support surface for the forces acting during the brake application is formed on the inner side of the saddle rear wall. The machining of the support surface (20) is carried out from the direction of the free space and, for this purpose, a tool (55) is brought from outside of the brake caliper (1) into the hollow space. In order to provide a method for machining the interior of a brake caliper of a disc brake, which allows a high-precision machining of the support surfaces inside the brake caliper even in the case of the narrow space conditions which are typical for the machining of a single-piece brake caliper, the tool (55) is guided into the cavity through another opening (25) than the mounting opening (4).

An electromechanical rotary pipe mill or hone including a body, a motor with a mill or hone disposed thereon in radially adjustable position with respect to the body, a clamping device extendable from the body and configured for anchoring the tool in a tubular, and a portion of the body that is rotatable about an axis of the electromechanical pipe mill or hone. A method for removing material in a tubular including running on electric wireline an electromechanical rotary pipe mill or hone as in any prior embodiment to a target location in a tubular, registering the mill or hone with a feature identified for removal of material, deploying the clamping device, rotating the mill or hone on its own axis, rotating a portion of the body about its own axis, and radially displacing the mill or hone to remove material.

A mold machining method using an endmill, the contour of a cross section of the mold being concave and continuous in an area, a ratio of the maximum to the minimum of radius of curvature of the contour of a portion of the area (a first area) being 2 or greater, and a blade of the endmill having a second area where the contour of a cross section is similar to the contour of the first area, the method comprising the steps of: determining a spiral path of the endmill such that each point of the first area is machined by a portion of the second area, corresponding to said each point in the similarity, and a radial interval between the spiral tool path is maximized while keeping surface roughness of the machined mold at or below a predetermined value; and machining the mold along the path.

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 chamfering device includes: a main body including, at a proximal end side thereof, a shank to be attached to a main shaft of a machine tool, the main body including, at a distal end side thereof, a shaft portion extending in a rotational axis direction; a movable body whose proximal end portion is mounted to the shaft portion, the movable body being configured to rotate together with the shaft portion and be movable in the rotational axis direction; an urging member configured to urge the movable body in a direction toward the distal end of the main body; a chamfering tool mounted to a distal end portion of the movable body and configured to rotate together with the movable body to perform chamfering on an edge portion of a workpiece; and a following member mounted to the movable body such that a position of the following member relative to the movable body in the rotational axis direction is invariable and the following member is rotatable relative to the movable body, the following member being configured such that a distal end thereof comes into contact with a surface of the workpiece.

A milling device for machining a slot into an inner surface of a casing for a gas turbine engine. The milling device includes a frame assembly including multiple structural guides configured to engage structural features on the inner surface of the casing to maintain an axial position of the milling device relative to a longitudinal axis of the casing. The milling device also includes a milling cutter coupled to the frame assembly. The milling device is configured to be displaced in a circumferential direction relative to the longitudinal axis to machine the slot, via the milling cutter, along the inner surface of the casing in the circumferential direction.

The invention relates to a method for machining the interior of a brake caliper (1) of a disc brake, on which are formed: a first saddle portion to the one side of the brake disc of the disc brake, a second saddle portion to the other side of the brake disc, and a bridge section connecting the saddle portions and providing a free space for at least a part of the brake disc. At least one of the saddle portions is provided with a hollow space (7) for receiving a brake application device, wherein said hollow space comprises a mounting opening (4) towards the free space and extends in the opposite direction until a saddle rear wall (18). At least one support surface for the forces acting during the brake application is formed on the inner side of the saddle rear wall. The machining of the support surface (20) is carried out from the direction of the free space and, for this purpose, a tool (55) is brought from outside of the brake caliper (1) into the hollow space. In order to provide a method for machining the interior of a brake caliper of a disc brake, which allows a high-precision machining of the support surfaces inside the brake caliper even in the case of the narrow space conditions which are typical for the machining of a single-piece brake caliper, the tool (55) is guided into the cavity through another opening (25) than the mounting opening (4).

Various embodiments of manufacturing pistol frames are described. According to various embodiments, a left pistol frame portion is fabricated. A separate right pistol frame portion is also fabricated. The left pistol frame portion is attached to the right pistol frame portion to form a pistol frame.

An attrition liner machining tool, configured to machine the surface of an attrition liner provided radially outward of a set of a plurality of fan blades in a gas turbine engine. The tool includes at least one rotating machine tool having a connector at a first end and a cutter at a second end. The connector is configured to rigidly connect to a rotating fan blade mount of the gas turbine engine that, in use of the gas turbine engine, supports the fan blades. The cutter is configured to machine the attrition liner. The at least one rotating machine tool is configured such that, when it is connected to said rotating fan blade mount of a gas turbine engine, the cutter is passed across the surface of the attrition liner when said rotating fan blade mount is rotated.