A wire electric discharge machining apparatus is provided. The wire electric discharge machining apparatus includes an upper support that supports an upper guide unit that guides a wire electrode on an upper side. The upper support includes an arm having a lower end provided with the upper guide unit, an axis drive portion moving the arm in at least one axial direction and made of a material that has a larger coefficient of linear expansion than ceramics, and an adjustment block connecting the arm and the axis drive portion and made of ceramics. The adjustment block is fixed at a position where a displacement of the upper guide unit caused by expansion and contraction of the upper support is suppressed by a bimetal effect occurring on a fastening surface of the axis drive portion and the adjustment block.

A wire electric discharge machining apparatus is provided. The wire electric discharge machining apparatus includes an upper support that supports an upper guide unit that guides a wire electrode on an upper side. The upper support includes an arm having a lower end provided with the upper guide unit, an axis drive portion moving the arm in at least one axial direction and made of a material that has a larger coefficient of linear expansion than ceramics, and an adjustment block connecting the arm and the axis drive portion and made of ceramics. The adjustment block is fixed at a position where a displacement of the upper guide unit caused by expansion and contraction of the upper support is suppressed by a bimetal effect occurring on a fastening surface of the axis drive portion and the adjustment block.

A method for producing a rotor disk or a rotor blade for a gas turbine compressor stage or turbine stage of an aeroengine, wherein at least one blade groove of the rotor disk for arrangement of a blade foot of a rotor blade for fastening the rotor blade to the rotor disk, or a blade foot of the rotor blade for arrangement in a blade groove of a rotor disk for fastening the rotor blade to the rotor disk is fabricated using an electrochemical material removal and in the axial direction has a profile which is curved once or more.

The present disclosure relates to an electrical discharge machining (EDM) device, and a method for machining a workpiece by the EDM device. The EDM device includes a spindle, a guide structure including a plurality of guideways, and a plurality of electrodes, the electrode coupled to the spindle via a flexible link, and slidably engaged with a respective one of the plurality of guideways.

The present disclosure relates to an electrical discharge machining (EDM) device, and a method for machining a workpiece by the EDM device. The EDM device includes a spindle, a guide structure including a plurality of guideways, and a plurality of electrodes, the electrode coupled to the spindle via a flexible link, and slidably engaged with a respective one of the plurality of guideways.

The present disclosure relates to an electrical discharge machining (EDM) device, and a method for machining a workpiece by the EDM device. The EDM device includes a spindle, a guide structure including a plurality of guideways, and a plurality of electrodes, the electrode coupled to the spindle via a flexible link, and slidably engaged with a respective one of the plurality of guideways.

The present disclosure relates to an electrical discharge machining (EDM) device, and a method for machining a workpiece by the EDM device. The EDM device includes a spindle, a guide structure including a plurality of guideways, and a plurality of electrodes, the electrode coupled to the spindle via a flexible link, and slidably engaged with a respective one of the plurality of guideways.

An electrochemical machining assembly for boring a passage in an electrically conductive workpiece. The electrochemical machining assembly includes an electrochemical machining tool having a telescoping collar with an articulating head coupled thereto. The telescoping collar is hydraulically actuatable between a contracted configuration and an extended configuration responsive to fluid pressure provided by an electrolyte fluid circulated by the electrochemical machining assembly to advance the telescoping collar stepwise in the passage. The articulating head is tiltable relative to the telescoping collar to determine a direction of the passage. The electrochemical machining assembly is configured to remove material from the workpiece upon application of a voltage between the articulating head and the workpiece via the electrolyte fluid to lengthen the passage.

An electrochemical machining assembly for boring a passage in an electrically conductive workpiece. The electrochemical machining assembly includes an electrochemical machining tool having a telescoping collar with an articulating head coupled thereto. The telescoping collar is hydraulically actuatable between a contracted configuration and an extended configuration responsive to fluid pressure provided by an electrolyte fluid circulated by the electrochemical machining assembly to advance the telescoping collar stepwise in the passage. The articulating head is tiltable relative to the telescoping collar to determine a direction of the passage. The electrochemical machining assembly is configured to remove material from the workpiece upon application of a voltage between the articulating head and the workpiece via the electrolyte fluid to lengthen the passage.

An electrochemical machining assembly for boring a passage in an electrically conductive workpiece. The electrochemical machining assembly includes an electrochemical machining tool having a telescoping collar with an articulating head coupled thereto. The telescoping collar is actuated between a contracted configuration and an extended configuration to advance the telescoping collar stepwise in the passage. The articulating head is tiltable relative to the telescoping collar to determine a direction of the passage. The electrochemical machining assembly is configured to remove material from the workpiece upon application of a voltage between the articulating head and the workpiece via a circulating electrolyte fluid to lengthen the passage.