Provided is an endmill. The maximum spindle speed, per one minute, of a main spindle to which the endmill is attached is Smax. The number of teeth of the endmill is N. The outer shape of the endmill is Da. The natural frequency at which vibrations at the end of the endmill reach a maximum level is ω1. ω1 and/or N are set so that when the diameter-direction infeed amount of the endmill is set to Rd: i) ω1×60/N×6<Smax, if Rd is at least 4% of Da; and ii) ω1×60/N×3<Smax, if Rd is less than 4% of Da.

Positioning system with an adjustable clamping force and milling equipment for a rail transit honeycomb workpiece. The positioning system includes a positioning apparatus, including a positioning table to support a workpiece, and a clamping apparatus, including a turntable, which is fixedly disposed on a periphery of the positioning table, a top of the turntable is connected to a mechanical arm, a pressure plate is disposed at an end of the mechanical arm, the pressure plate being capable of cooperating with the positioning table to clamp the workpiece, working regions of all the clamping apparatuses being capable of covering a machining surface of the workpiece, when machining is performed in an intersection region, a clamping apparatus corresponding to the region clamps the workpiece, and when machining is performed in a non-intersection region, a clamping apparatus corresponding to the region dodges, and an adjacent clamping apparatus clamps the workpiece.

The present invention discloses a positioning system with an adjustable clamping force and a milling equipment for a rail transit honeycomb workpiece. The positioning system includes: a positioning apparatus, including a positioning table to support a workpiece; and a clamping apparatus, including a turntable, where the turntable is fixedly disposed on a periphery of the positioning table, a top of the turntable is connected to a mechanical arm, a pressure plate is disposed at an end of the mechanical arm, and the pressure plate is capable of cooperating with the positioning table to clamp the workpiece, where there are a plurality of clamping apparatuses, working regions of adjacent clamping apparatuses have an intersection, and working regions of all the clamping apparatuses are capable of covering a machining surface of the workpiece; and when machining is performed in an intersection region, a clamping apparatus corresponding to the region clamps the workpiece, and when machining is performed in a non-intersection region, a clamping apparatus corresponding to the region dodges, and an adjacent clamping apparatus clamps the workpiece.

A component according to the disclosure may include a body having an aperture therein for receiving one of a turbomachine shaft or a lathe chuck, wherein in response to the body being coupled to the lathe chuck, the aperture is oriented substantially axially relative to an axis of rotation of the body with the lathe chuck; and a flange coupled to and in direct axial contact with the body, the flange including a surface that extends axially relative to the axis of rotation of the body, wherein the surface of the flange comprises a matingly engageable face configured to contact an axially aligned surface during operation of the component and having a sanding indentation thereon, wherein a surface roughness of the surface of the flange is less than a surface roughness of a remainder of the component.

A component according to the disclosure may include a body having an aperture therein for receiving one of a turbomachine shaft or a lathe chuck, wherein in response to the body being coupled to the lathe chuck, the aperture is oriented substantially axially relative to an axis of rotation of the body with the lathe chuck; and a flange coupled to and in direct axial contact with the body, the flange including a surface that extends axially relative to the axis of rotation of the body, wherein the surface of the flange comprises a matingly engageable face configured to contact an axially aligned surface during operation of the component and having a sanding indentation thereon, wherein a surface roughness of the surface of the flange is less than a surface roughness of a remainder of the component.

The invention relates to a method for machining a workpiece by means of a milling tool arranged on a rotatable spindle, the spindle being moved relative to the workpiece or the workpiece being moved relative to the spindle along a machining path and, at the same time, the spindle rotating about a spindle axis. In said method, an improvement in the surface quality is achieved by controlling the rotational speed and/or the phase position of the rotation of the spindle along the machining path, the machining path comprising linear parallel tracks and the phase position of the spindle along the machining path being substantially the same on adjacent tracks, the phase position being controlled by varying the rotational speed of the spindle and/or the advancing speed of the spindle relative to the workpiece along the machining path.

The invention relates to a method for machining a workpiece by means of a milling tool arranged on a rotatable spindle, the spindle being moved relative to the workpiece or the workpiece being moved relative to the spindle along a machining path and, at the same time, the spindle rotating about a spindle axis. In said method, an improvement in the surface quality is achieved by controlling the rotational speed and/or the phase position of the rotation of the spindle along the machining path, the machining path comprising linear parallel tracks and the phase position of the spindle along the machining path being substantially the same on adjacent tracks, the phase position being controlled by varying the rotational speed of the spindle and/or the advancing speed of the spindle relative to the workpiece along the machining path.

A machine tool head for machining internal surfaces of a cavity defined by a monobloc caliper for a disc brake assembly. The tool head is an angle head comprising a cutter for machining said internal surfaces and a drive train configured to connect the cutter to an actuator. The cutter comprises a first cutting edge configured for cutting as the tool head is moved in a first direction and a second cutting edge configured for cutting as the tool head is moved in a second direction.

Provided is a roll mold that has a plurality of linear grooves arranged side by side on its outer peripheral surface and in which an optical step between adjacent linear grooves is sufficiently small. A roll mold comprising, on an outer peripheral surface thereof, n linear grooves extending in a roll axial direction or a direction inclined with respect to the roll axial direction and arranged side by side, where n is 800 or more, wherein the n linear grooves are arranged in a manner that a gradual decrease and a gradual increase in groove depth are repeated, and the number of points at which a transition from the decrease to the increase in groove depth occurs is m or less, where m is selected from 2 to 8.

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.